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tqcq 2024-12-19 13:14:37 +08:00
commit 4c1b3da5e4
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.clang-format Normal file
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# Generated from CLion C/C++ Code Style settings
BinPackParameters: false
BasedOnStyle: LLVM
AccessModifierOffset: -4
AlignArrayOfStructures: Left
AlignAfterOpenBracket: Align
AlignConsecutiveAssignments:
Enabled: true
AcrossEmptyLines: true
AcrossComments: false
AlignOperands: DontAlign
AllowAllArgumentsOnNextLine: false
AllowAllConstructorInitializersOnNextLine: false
AllowAllParametersOfDeclarationOnNextLine: false
AllowShortBlocksOnASingleLine: Always
AllowShortCaseLabelsOnASingleLine: false
AllowShortFunctionsOnASingleLine: All
AllowShortIfStatementsOnASingleLine: true
AllowShortLambdasOnASingleLine: All
AllowShortLoopsOnASingleLine: true
AlwaysBreakTemplateDeclarations: Yes
# 函数和返回类型分两行，方便阅读
AlwaysBreakAfterReturnType: TopLevelDefinitions
BreakBeforeBraces: Custom
BraceWrapping:
AfterCaseLabel: false
AfterClass: false
AfterControlStatement: Never
AfterEnum: false
AfterFunction: true
AfterNamespace: false
AfterUnion: false
BeforeCatch: false
BeforeElse: false
IndentBraces: false
SplitEmptyFunction: false
SplitEmptyRecord: true
BreakBeforeBinaryOperators: NonAssignment
BreakBeforeTernaryOperators: true
BreakConstructorInitializers: BeforeColon
ConstructorInitializerAllOnOneLineOrOnePerLine: true
BreakInheritanceList: BeforeColon
ColumnLimit: 120
CompactNamespaces: false
ContinuationIndentWidth: 4
EmptyLineBeforeAccessModifier: LogicalBlock
SeparateDefinitionBlocks: Always
IndentCaseLabels: false
IndentPPDirectives: None
IndentWidth: 4
KeepEmptyLinesAtTheStartOfBlocks: true
MaxEmptyLinesToKeep: 1
NamespaceIndentation: None
ObjCSpaceAfterProperty: false
ObjCSpaceBeforeProtocolList: false
PointerAlignment: Right
ReflowComments: false
SortIncludes: CaseSensitive
SpaceAfterCStyleCast: true
SpaceAfterLogicalNot: false
SpaceAfterTemplateKeyword: false
SpaceBeforeAssignmentOperators: true
SpaceBeforeCpp11BracedList: false
SpaceBeforeCtorInitializerColon: true
SpaceBeforeInheritanceColon: true
SpaceBeforeParens: ControlStatements
SpaceBeforeRangeBasedForLoopColon: true
SpaceInEmptyParentheses: false
SpacesBeforeTrailingComments: 0
SpacesInAngles: false
SpacesInCStyleCastParentheses: false
SpacesInContainerLiterals: false
SpacesInParentheses: false
SpacesInSquareBrackets: false
TabWidth: 4
UseTab: Never
PenaltyIndentedWhitespace: 1

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.gitattributes vendored Normal file
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*.gz filter=lfs diff=lfs merge=lfs -text
*.png filter=lfs diff=lfs merge=lfs -text
*.jpeg filter=lfs diff=lfs merge=lfs -text
*.jpg filter=lfs diff=lfs merge=lfs -text

72
.gitea/workflows/android.yml Normal file
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name: android
on:
push:
paths:
- ".github/workflows/android.yml"
- "cmake/**"
- "CMakeLists.txt"
- "tile/**"
- "third_party/**"
pull_request:
paths:
- ".github/workflows/android.yml"
- "cmake/**"
- "CMakeLists.txt"
- "tile/**"
- "third_party/**"
concurrency:
group: android-${{github.ref}}
cancel-in-progress: true
jobs:
build:
runs-on: ubuntu-20.04
env:
TILE_CMAKE_OPTIONS: |
-DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_LATEST_HOME/build/cmake/android.toolchain.cmake \
-DANDROID_PLATFORM=android-21 \
-DCMAKE_INSTALL_PREFIX=install \
-DCMAKE_BUILD_TYPE=Release \
-DNCNN_VULKAN=ON \
steps:
- uses: actions/checkout@v4
with:
submodules: true
- name: install-tools
run: |
apt-get update -y
apt-get install -y ninja-build
- name: armeabi-v7a
run: |
mkdir build-armeabi-v7a && cd build-armeabi-v7a
cmake -GNinja .. ${{ env.TILE_CMAKE_OPTIONS}} -DCMAKE_ABI="armeabi-v7a" -DANDROID_ARM_NEON=ON
cmake --build . -j $(nproc)
- name: arm64-v8a
run: |
mkdir build-arm64-v8a && cd build-arm64-v8a
cmake -GNinja .. ${{ env.TILE_CMAKE_OPTIONS}} -DCMAKE_ABI="arm64-v8a"
cmake --build . -j $(nproc)
- name: x86
run: |
mkdir build-x86 && cd build-x86
cmake -GNinja .. ${{ env.TILE_CMAKE_OPTIONS}} -DCMAKE_ABI="x86"
cmake --build . -j $(nproc)
- name: x86_64
run: |
mkdir build-x86_64 && cd build-x86_64
cmake -GNinja .. ${{ env.TILE_CMAKE_OPTIONS}} -DCMAKE_ABI="x86_64"
cmake --build . -j $(nproc)

58
.gitea/workflows/linux-aarch64-gcc.yml Normal file
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---
name: linux-aarch64-cpu-gcc
on:
push:
paths:
- ".gitea/workflows/linux-aarch64-gcc.yml"
- "cmake/**"
- "toolchains/aarch64-linux-gnu.toolchain.cmake"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_aarch64.*"
- "CMakeLists.txt"
- "cmake/**"
pull_request:
paths:
- ".gitea/workflows/linux-aarch64-gcc.yml"
- "cmake/**"
- "toolchains/aarch64-linux-gnu.toolchain.cmake"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_aarch64.*"
- "CMakeLists.txt"
- "cmake/**"
concurrency:
group: linux-aarch64-cpu-gcc-${{ github.ref }}
cancel-in-progress: true
permissions:
contents: read
jobs:
linux-gcc-aarch64:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y g++-aarch64-linux-gnu qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/aarch64-linux-gnu.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_BENCHMARKS=ON ..
- name: build
run: |
cd build
cmake --build . -j $(nproc)
- name: test
run: |-
cd build
sudo ln -sf /usr/aarch64-linux-gnu/lib/ld-linux-aarch64.so.1 /lib/ld-linux-aarch64.so.1
export LD_LIBRARY_PATH=/usr/aarch64-linux-gnu/lib
ctest --output-on-failure -j $(nproc)

84
.gitea/workflows/linux-arm-gcc.yml Normal file
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---
name: linux-arm-gcc
on:
push:
paths:
- .gitea/workflows/linux-arm-gcc.yml
- "cmake/**"
- toolchains/arm-linux-gnueabi.toolchain.cmake
- toolchains/arm-linux-gnueabihf.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_arm.*"
- CMakeLists.txt
- cmake/**
pull_request:
paths:
- .gitea/workflows/linux-arm-gcc.yml
- "cmake/**"
- toolchains/arm-linux-gnueabi.toolchain.cmake
- toolchains/arm-linux-gnueabihf.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_arm.*"
- CMakeLists.txt
- cmake/**
concurrency:
group: linux-arm-gcc-${{ github.ref }}
cancel-in-progress: true
jobs:
linux-gcc-arm:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y g++-arm-linux-gnueabi qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/arm-linux-gnueabi.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_TESTS=ON ..
- name: build
run: |
cd build
cmake --build . -j $(nproc)
- name: test
run: |
cd build
sudo ln -sf /usr/arm-linux-gnueabi/lib/ld-linux.so.3 /lib/ld-linux.so.3
export LD_LIBRARY_PATH=/usr/arm-linux-gnueabi/lib
ctest --output-on-failure -j $(nproc)
linux-gcc-armhf:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: arm-gnu-toolchain
run: |
sudo apt-get update -y
sudo apt-get install -y g++-arm-linux-gnueabihf qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/arm-linux-gnueabihf.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_BENCHMARKS=ON ..
- name: build
run: |
cd build
cmake --build . -j $(nproc)
- name: test
run: |-
cd build
sudo ln -sf /usr/arm-linux-gnueabihf/lib/ld-linux-armhf.so.3 /lib/ld-linux-armhf.so.3
export LD_LIBRARY_PATH=/usr/arm-linux-gnueabihf/lib/
ctest --output-on-failure -j $(nproc)

53
.gitea/workflows/linux-mips-gcc.yml Normal file
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---
name: linux-mips-gcc
on:
push:
paths:
- .gitea/workflows/linux-mips-gcc.yml
- "toolchains/mips-linux-gnu.toolchain.cmake"
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_mips32.*"
- CMakeLists.txt
- cmake/**
pull_request:
paths:
- .gitea/workflows/linux-mips-gcc.yml
- "toolchains/mips-linux-gnu.toolchain.cmake"
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_mips32.*"
- CMakeLists.txt
- cmake/**
concurrency:
group: linux-mips-gcc-${{ github.ref }}
cancel-in-progress: true
permissions: read-all
jobs:
linux-gcc-mipsel:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: [Debug, Release]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y g++-mipsel-linux-gnu qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/mips-linux-gnu.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_BENCHMARKS=ON ..
- name: build
run: cmake --build build --target all -j $(nproc)
- name: test
run: |-
cd build
sudo ln -sf /usr/mipsel-linux-gnu/lib/ld.so.1 /lib/ld.so.1
export LD_LIBRARY_PATH=/usr/mipsel-linux-gnu/lib/
ctest --output-on-failure -j $(nproc)

54
.gitea/workflows/linux-mips64-gcc.yml Normal file
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@ -0,0 +1,54 @@
---
name: linux-mips64-gcc
on:
push:
paths:
- .gitea/workflows/linux-mips64-gcc.yml
- toolchains/mips64el-linux-gnuabi64.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_mips64.*"
- CMakeLists.txt
- cmake/**
pull_request:
paths:
- .gitea/workflows/linux-mips64-gcc.yml
- "cmake/**"
- toolchains/mips64el-linux-gnuabi64.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_mips64.*"
- CMakeLists.txt
- cmake/**
concurrency:
group: linux-mips64-gcc-${{ github.ref }}
cancel-in-progress: true
permissions: read-all
jobs:
linux-gcc-mips64el:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: [Debug, Release]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y g++-mips64el-linux-gnuabi64 qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/mips64el-linux-gnuabi64.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_BENCHMARKS=ON ..
- name: build
run: cmake --build build --target all -j $(nproc)
- name: test
run: |-
cd build
sudo ln -sf /usr/mips64el-linux-gnuabi64/lib64/ld.so.1 /lib64/ld.so.1
export LD_LIBRARY_PATH=/usr/mips64el-linux-gnuabi64/lib
ctest --output-on-failure -j $(nproc)

55
.gitea/workflows/linux-riscv64-gcc.yml Normal file
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@ -0,0 +1,55 @@
---
name: linux-riscv64-gcc
on:
push:
paths:
- .gitea/workflows/linux-riscv64-gcc.yml
- "cmake/**"
- toolchains/riscv64-linux-gnu.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_riscv64.*"
- CMakeLists.txt
- cmake/**
pull_request:
paths:
- .gitea/workflows/linux-riscv64-gcc.yml
- "cmake/**"
- toolchains/riscv64-linux-gnu.toolchain.cmake
- third_party/**
- tile/**
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_riscv64.*"
- CMakeLists.txt
- cmake/**
concurrency:
group: linux-riscv64-gcc-${{ github.ref }}
cancel-in-progress: true
permissions: read-all
jobs:
linux-gcc-riscv64:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: [Debug, Release]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y g++-riscv64-linux-gnu qemu-user-binfmt ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/riscv64-linux-gnu.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_TESTS=ON -DTILE_BUILD_BENCHMARKS=ON ..
- name: build
run: cmake --build build --target all -j $(nproc)
- name: test
run: |-
cd build
sudo ln -sf /usr/riscv64-linux-gnu/lib/ld-linux-riscv64-lp64d.so.1 /lib/ld-linux-riscv64-lp64d.so.1
export LD_LIBRARY_PATH=/usr/riscv64-linux-gnu/lib
ctest --output-on-failure -j $(nproc)

52
.gitea/workflows/linux-x64-clang.yml Normal file
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name: linux-x64-clang
on:
push:
paths:
- ".gitea/workflows/linux-x64-clang.yml"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "CMakeLists.txt"
pull_request:
paths:
- ".gitea/workflows/linux-x64-clang.yml"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "CMakeLists.txt"
concurrency:
group: linux-x64-clang-${{ github.ref }}
cancel-in-progress: true
jobs:
linux-clang:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y ninja-build
- name: configure
env:
CC: clang
CXX: clang++
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON ..
- name: build
run: |
cmake --build build -j $(nproc)
- name: test
run: |
cd build
ctest --output-on-failure
# - name: benchmark
# run: |
# ./build/sled_benchmark

53
.gitea/workflows/linux-x64-gcc.yml Normal file
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@ -0,0 +1,53 @@
name: linux-x64-gcc
on:
push:
paths:
- ".gitea/workflows/linux-x64-gcc.yml"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_x64.*"
- "CMakeLists.txt"
pull_request:
paths:
- ".gitea/workflows/linux-x64-gcc.yml"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_x64.*"
- "CMakeLists.txt"
concurrency:
group: linux-x64-gcc-${{ github.ref }}
cancel-in-progress: true
jobs:
linux-gcc:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON ..
- name: build
run: |
cmake --build build -j $(nproc)
- name: test
run: |
cd build
ctest --output-on-failure -j $(nproc)
- name: benchmark
run: |
./build/bin/tile_bm_all

55
.gitea/workflows/linux-x86-gcc.yml Normal file
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@ -0,0 +1,55 @@
name: linux-x86-gcc
on:
push:
paths:
- ".gitea/workflows/linux-x86-gcc.yml"
- "toolchains/host.gcc-m32.toolchain.cmake"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_x86.*"
- "CMakeLists.txt"
pull_request:
paths:
- ".gitea/workflows/linux-x86-gcc.yml"
- "toolchains/host.gcc-m32.toolchain.cmake"
- "cmake/**"
- "third_party/**"
- "tile/**"
- "!tile/fiber/detail/asm/*"
- "tile/fiber/detail/asm/ucontext_x86.*"
- "CMakeLists.txt"
concurrency:
group: linux-x86-gcc-${{ github.ref }}
cancel-in-progress: true
jobs:
linux-gcc:
runs-on: ubuntu-20.04
strategy:
matrix:
build_type: ["Debug", "Release"]
steps:
- uses: actions/checkout@v4
with:
submodules: recursive
- name: install-tools
run: |
sudo apt-get update -y
sudo apt-get install -y gcc-multilib g++-multilib ninja-build
- name: configure
run: |
mkdir build && cd build
cmake -GNinja -DCMAKE_TOOLCHAIN_FILE=../toolchains/host.gcc-m32.toolchain.cmake -DCMAKE_BUILD_TYPE=${{matrix.build_type}} -DTILE_BUILD_BENCHMARKS=ON -DTILE_BUILD_TESTS=ON ..
- name: build
run: |
cmake --build build -j $(nproc)
- name: test
run: |
cd build
ctest --output-on-failure -j $(nproc)
- name: benchmark
run: |
./build/bin/tile_bm_all

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.gitignore vendored Normal file
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out/
build/
.cache/
compile_commands.json
.gdb_history
.cmake.conf

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CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.5)
set(tile_VERSION_MAJOR 0)
set(tile_VERSION_MINOR 1)
set(tile_VERSION_PATCH 1)
set(tile_VERSION_BUILD $ENV{CI_STEP_NUMBER})
if(NOT tile_VERSION_BUILD)
set(tile_VERSION_BUILD "0")
endif()
set(TILE_VERSION
"${tile_VERSION_MAJOR}.${tile_VERSION_MINOR}.${tile_VERSION_PATCH}.${tile_VERSION_BUILD}"
)
project(
tile
VERSION "${tile_VERSION_MAJOR}.${tile_VERSION_MINOR}.${tile_VERSION_PATCH}"
LANGUAGES C CXX)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
# add static libgcc and libstdc++ for static linking set(CMAKE_C_FLAGS
# "${CMAKE_C_FLAGS} -static-libgcc -static-libstdc++") set(CMAKE_CXX_FLAGS
# "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
option(TILE_BUILD_TESTS "Build tests" OFF)
option(TILE_BUILD_BENCHMARKS "Build tests" OFF)
option(TILE_WITH_OPENSSL "Build wih openssl" OFF)
option(TILE_BUILD_SHARED "Build shared library" ON)
option(TILE_WITH_MIMALLOC "Build with mimalloc" OFF)
if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
set(TILE_BUILD_TESTS ON)
set(TILE_BUILD_BENCHMARKS ON)
endif()
if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE "Release")
endif()
# if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") # set(CMAKE_CXX_FLAGS
# "${CMAKE_CXX_FLAGS} -gz") # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz") #
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS #
# "${CMAKE_CXX_FLAGS} -static") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} #
# -fsanitize=address ") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=address #
# ")
#
# set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load") # set(NO_WHOLE_ARCHIVE_PREFIX "")
# elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang") # set(CMAKE_CXX_FLAGS
# "${CMAKE_CXX_FLAGS} -gz") # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz") #
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static") set(CMAKE_C_FLAGS #
# "${CMAKE_CXX_FLAGS} -static")
#
# set(WHOLE_ARCHIVE_PREFIX "-Wl,-force_load,") # set(NO_WHOLE_ARCHIVE_PREFIX "")
# elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU") set(CMAKE_CXX_FLAGS
# "${CMAKE_CXX_FLAGS} -gz") set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -gz") #
# set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++") #
# set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -static-libgcc -static-libstdc++")
#
# set(STATIC_BINARY_FLAGS "-static-libgcc -static-libstdc++")
# set(WHOLE_ARCHIVE_PREFIX "-Wl,--whole-archive") set(WHOLE_ARCHIVE_SUFFIX
# "-Wl,--no-whole-archive") endif()
# extern int getifaddrs(struct ifaddrs **ifap); extern void freeifaddrs(struct
# ifaddrs *ifa);
include(CheckSymbolExists)
include(cmake/BuildInfo.cmake)
check_symbol_exists("getifaddrs" "ifaddrs.h" TILE_HAVE_GETIFADDRS)
check_symbol_exists("freeifaddrs" "ifaddrs.h" TILE_HAVE_FREEIFADDRS)
# find_package(Git REQUIRED)
#
# get_git_commit_hash(GIT_COMMIT_HASH) get_git_commit_date(GIT_COMMIT_DATE)
# get_git_commit_subject(GIT_COMMIT_SUBJECT)
set(THIRD_PARTY_INCLUDE_DIRS # "third_party/json" "third_party/inja"
"third_party/sigslot"
"${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include")
include_directories(${THIRD_PARTY_INCLUDE_DIRS})
add_subdirectory("third_party/zlib")
if(TILE_WITH_MIMALLOC)
add_subdirectory("third_party/mimalloc")
endif()
add_subdirectory("third_party/jsoncpp")
add_subdirectory("third_party/fmt")
add_subdirectory("third_party/googletest")
add_subdirectory("third_party/gflags")
set(GFLAGS_USE_TARGET_NAMESPACE ON)
set(gflags_DIR "${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags")
# add_subdirectory("third_party/context")
set(CURL_DISABLE_TESTS ON)
set(CURL_CA_PATH
"none"
CACHE STRING "" FORCE)
set(CURL_ENABLE_SSL
OFF
CACHE BOOL "" FORCE)
set(USE_LIBIDN2
OFF
CACHE BOOL "" FORCE)
set(CURL_USE_LIBPSL
OFF
CACHE BOOL "" FORCE)
set(CURL_USE_LIBSSH
OFF
CACHE BOOL "" FORCE)
set(CURL_USE_LIBSSH2
OFF
CACHE BOOL "" FORCE)
set(CURL_USE_GSSAPI
OFF
CACHE BOOL "" FORCE)
set(CURL_USE_RTMP
OFF
CACHE BOOL "" FORCE)
set(USE_OPENSSL_QUIC
OFF
CACHE BOOL "" FORCE)
set(USE_MSH3
OFF
CACHE BOOL "" FORCE)
set(CURL_DISABLE_LDAP
ON
CACHE BOOL "" FORCE)
set(ZLIB_FOUND ON)
set(ZLIB_INCLUDE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/third_party/zlib")
set(ZLIB_LIBRARIES zlib)
add_subdirectory("third_party/curl")
# add_subdirectory("third_party/date")
if(TILE_WITH_OPENSSL)
add_subdirectory("third_party/openssl-cmake")
list(APPEND TILE_LINK_LIBS ssl crypto)
endif()
configure_file("tile/base/config.h.in"
"${CMAKE_CURRENT_BINARY_DIR}/tile/base/config.h" @ONLY)
# file(GLOB zlib_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/third_party/zlib/zlib/*.c")
set(TILE_SRCS
"tile/base/buffer/builtin_buffer_block.cc"
"tile/base/buffer/compression_output_stream.cc"
"tile/base/buffer/polymorphic_buffer.cc"
"tile/base/buffer.cc"
"tile/base/chrono.cc"
"tile/base/compression.cc"
"tile/base/compression/compression.cc"
"tile/base/compression/gzip.cc"
"tile/base/compression/util.cc"
"tile/base/demangle.cc"
"tile/base/encoding/base64.cc"
"tile/base/encoding/detail/hex_chars.cc"
"tile/base/encoding/hex.cc"
"tile/base/encoding/percent.cc"
"tile/base/exposed_var.cc"
"tile/base/internal/background_task_host.cc"
"tile/base/internal/background_task_host.h"
"tile/base/internal/case_insensitive_hash_map.h"
"tile/base/internal/curl.cc"
"tile/base/internal/curl.h"
"tile/base/internal/early_init.h"
"tile/base/internal/index_alloc.cc"
"tile/base/internal/logging.cc"
"tile/base/internal/logging.h"
"tile/base/internal/thread_pool.cc"
"tile/base/internal/time_keeper.cc"
"tile/base/internal/time_keeper.h"
"tile/base/logging/basic_file_sink.cc"
"tile/base/logging/splitter_sink.cc"
"tile/base/logging/console_sink.cc"
"tile/base/net/endpoint.cc"
"tile/base/object_pool/disabled.cc"
"tile/base/object_pool/global.cc"
"tile/base/object_pool/thread_local.cc"
"tile/base/option.cc"
"tile/base/option/gflags_provider.cc"
"tile/base/option/json_parser.cc"
"tile/base/option/key.cc"
"tile/base/option/option_provider.cc"
"tile/base/option/option_service.cc"
"tile/base/slice.cc"
"tile/base/status.cc"
"tile/base/string.cc"
"tile/base/thread/cond_var.cc"
"tile/base/thread/latch.cc"
"tile/base/thread/mutex.cc"
"tile/base/thread/rw_mutex.cc"
"tile/base/thread/scoped_lock.cc"
"tile/base/thread/spinlock.cc"
"tile/base/memory_barrier.cc"
# "tile/fiber/detail/fiber.cc"
"tile/io/detail/eintr_safe.cc"
"tile/io/native/acceptor.cc"
"tile/io/descriptor.cc"
"tile/io/util/rate_limiter.cc"
"tile/io/event_loop.cc"
"tile/init.cc"
"tile/init/on_init.cc"
"tile/init/override_flag.cc"
"tile/net/http/http_headers.cc"
"tile/net/http/http_message.cc"
"tile/net/http/http_request.cc"
"tile/net/http/http_response.cc"
"tile/net/http/http_client.cc"
"tile/net/http/types.cc"
"tile/net/internal/http_task.cc"
"tile/net/internal/http_engine.cc"
"tile/testing/internal/random_string.cc"
"tile/rpc/protocol/http/buffer_io.cc"
"tile/rpc/protocol/message.cc"
# "tile/rpc/server.cc"
"tile/base/config/configuration.cc"
"tile/base/config/ini_file_configuration.cc"
"tile/base/config/json_configuration.cc"
"tile/base/config/layered_configuration.cc"
"tile/base/config/toml_configuration.cc"
"tile/system/os.cc")
if((NOT TILE_HAVE_GETIFADDRS) OR (NOT TILE_HAVE_FREEIFADDRS))
list(APPEND TILE_SRCS "tile/base/net/detail/android/ifaddrs.c")
endif()
if(TILE_BUILD_SHARED)
add_library(tile SHARED ${TILE_SRCS})
else()
add_library(tile STATIC ${TILE_SRCS})
endif()
set_target_properties(tile PROPERTIES VERSION ${PROJECT_VERSION}
SOVERSION ${PROJECT_VERSION_MAJOR})
target_precompile_headers(
tile
PUBLIC
${CMAKE_CURRENT_SOURCE_DIR}/third_party/header_only/toml.hpp
# ${CMAKE_CURRENT_SOURCE_DIR}/third_party/inja/inja/string_view.h
# ${CMAKE_CURRENT_SOURCE_DIR}/third_party/inja/inja/inja.h
# ${CMAKE_CURRENT_SOURCE_DIR}/jsoncpp/json/nlohann/json.hpp
)
# target_sources(tile PRIVATE ${TILE_SRCS})
target_include_directories(
tile
PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/third_party/mustache.hpp"
"${CMAKE_CURRENT_BINARY_DIR}"
"${CMAKE_CURRENT_SOURCE_DIR}/third_party/fmt/include"
# "${CMAKE_CURRENT_BINARY_DIR}/third_party/glog"
# "${CMAKE_CURRENT_SOURCE_DIR}/third_party/glog/src"
"${CMAKE_CURRENT_SOURCE_DIR}"
${THIRD_PARTY_INCLUDE_DIRS}
RPIVATE
"${CMAKE_CURRENT_SOURCE_DIR}/third_party/header_only/"
"${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include")
if(TILE_WITH_MIMALLOC)
target_link_libraries(tile PUBLIC mimalloc-obj)
endif()
target_link_libraries(
tile
PUBLIC # -Wl,--start-group nova_context
zlib
gflags::gflags # glog::glog
jsoncpp_static
# -Wl,--end-group
libcurl
fmt)
if((CMAKE_SYSTEM_PROCESSOR MATCHES "riscv64") OR (CMAKE_SYSTEM_PROCESSOR MATCHES
"mips*"))
if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
target_link_libraries(tile PUBLIC atomic)
endif()
endif()
# set(LIB_NAMES tile)
#
# if(("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") OR (MINGW) OR (HAIKU) OR
# ("${CMAKE_SYSTEM_NAME}" STREQUAL "FreeBSD") OR ("${CMAKE_SYSTEM_NAME}"
# STREQUAL "GNU") OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "OpenBSD") OR
# ("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia") OR ("${CMAKE_SYSTEM_NAME}"
# STREQUAL "DragonFly") OR ("${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS")) # FIXME:
# It should be "GNU ld # for elf" set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES}
# -Wl,--no-whole-archive) elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
# set(LIB_NAMES -Wl,-all_load ${LIB_NAMES}) endif()
add_library(tile::tile ALIAS tile)
# add_library(tile SHARED $<TARGET_OBJECTS:tile>) target_include_directories(
# tile PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/third_party/fmt/include"
# "${CMAKE_CURRENT_BINARY_DIR}/third_party/glog"
# "${CMAKE_CURRENT_SOURCE_DIR}/third_party/glog/src"
# "${CMAKE_CURRENT_SOURCE_DIR}" RPIVATE
# "${CMAKE_CURRENT_BINARY_DIR}/third_party/gflags/include")
# target_link_libraries( tile PRIVATE ${WHOLE_ARCHIVE_PREFIX} gflags::gflags
# glog::glog libcurl fmt::fmt ${NO_WHOLE_ARCHIVE_PREFIX})
if(TILE_BUILD_TESTS)
enable_testing()
add_executable(tile_test_all "tile/testing/main.cc")
target_link_libraries(tile_test_all PRIVATE gtest gmock tile::tile)
macro(tile_add_custom_test test_name test_file)
add_executable(${test_name} ${test_file} "tile/testing/main.cc")
target_link_libraries(
${test_name} PUBLIC gtest gmock ${WHOLE_ARCHIVE_PREFIX} tile::tile
${WHOLE_ARCHIVE_SUFFIX})
target_sources(${PROJECT_NAME}_test_all PRIVATE ${test_file})
endmacro()
macro(tile_add_test test_name test_file)
tile_add_custom_test(${test_name} ${test_file})
add_test(NAME ${test_name} COMMAND ${test_name})
endmacro()
function(add_test_group prefix group_name)
file(GLOB_RECURSE TEST_FILES "${prefix}/**/*_test.cc" "${prefix}/*_test.cc")
foreach(SRC_FILE ${TEST_FILES})
if(IS_DIRECTORY ${SRC_FILE})
continue()
endif()
# convert to relative path message(STATUS "${prefix} -> ${TEST_FILE}")
file(RELATIVE_PATH TEST_NAME "${prefix}" "${SRC_FILE}")
string(REPLACE "/" "_" TEST_NAME "${TEST_NAME}")
string(REPLACE "_test.cc" "_test" TEST_NAME "${TEST_NAME}")
# if group_name is not empty, add suffix _
if(NOT group_name STREQUAL "")
set(TEST_NAME "${group_name}_${TEST_NAME}")
endif()
tile_add_test(${TEST_NAME} ${SRC_FILE})
endforeach()
endfunction(add_test_group)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/system system)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/base base)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/init init)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/io io)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/net net)
add_test_group(${CMAKE_CURRENT_SOURCE_DIR}/tile/rpc rpc)
tile_add_custom_test("custom_http_client_test" "tests/http_client_test.cc")
endif(TILE_BUILD_TESTS)
if(TILE_BUILD_BENCHMARKS)
add_subdirectory("third_party/benchmark")
add_executable(tile_bm_all "tile/testing/bm_main.cc")
target_link_libraries(tile_bm_all PRIVATE benchmark::benchmark tile::tile)
macro(tile_add_bm benchmark_name benchmark_file)
add_executable(${benchmark_name} ${benchmark_file}
"tile/testing/bm_main.cc")
target_link_libraries(${benchmark_name} PRIVATE benchmark::benchmark
tile::tile)
target_sources(tile_bm_all PRIVATE ${benchmark_file})
endmacro()
# tile_add_bm(fiber_detail_fiber_benchmark
# "tile/fiber/detail/fiber_benchmark.cc")
tile_add_bm(base_buffer_benchmark "tile/base/buffer_benchmark.cc")
tile_add_bm(base_casting_benchmark "tile/base/casting_benchmark.cc")
tile_add_bm(base_thread_mutex_benchmark "tile/base/thread/mutex_benchmark.cc")
tile_add_bm(base_encoding_benchmark "tile/base/encoding_benchmark.cc")
tile_add_bm(base_internal_time_keeper_benchmark
"tile/base/internal/time_keeper_benchmark.cc")
tile_add_bm(base_chrono_benchmark "tile/base/chrono_benchmark.cc")
endif(TILE_BUILD_BENCHMARKS)

3
README.md Normal file
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## TILE
一个`C++11`工具库，集成常见的编码工具

26
cmake/BuildInfo.cmake Normal file
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macro(get_git_commit_hash output)
# full commit hash
execute_process(
COMMAND ${GIT_EXECUTABLE} log -1 --format="%H"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE ${output}
OUTPUT_STRIP_TRAILING_WHITESPACE)
endmacro()
macro(get_git_commit_date output)
# 2024-06-02T20:17:41+00:00
execute_process(
COMMAND ${GIT_EXECUTABLE} log -1 --format="%cI"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE ${output}
OUTPUT_STRIP_TRAILING_WHITESPACE)
endmacro()
macro(get_git_commit_subject output)
# message from `git commit -m "message"`
execute_process(
COMMAND ${GIT_EXECUTABLE} log -1 --format="%s"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE GIT_COMMIT_SUBJECT
OUTPUT_STRIP_TRAILING_WHITESPACE)
endmacro()

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custom_data_source: {
name: "dir"
base_data_source: "compileunits"
rewrite: {
pattern: "^(.*/)(third_party/\\w+)"
replacement: "\\2"
}
rewrite: {
pattern: "^(.*/)(3party/\\w+)"
replacement: "\\2"
}
}

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#include "tile/net/http/http_client.h"
#include "gtest/gtest.h"
#include "tile/base/thread/latch.h"
const std::string url = "http://127.0.0.1:8000/";
TEST(HttpClient, Request) {
tile::HttpClient client;
std::vector<tile::Future<
std::expected<tile::HttpResponse, tile::HttpClient::ErrorCode>>>
v;
tile::HttpClient::RequestOptions options;
options.timeout = std::chrono::seconds(20);
std::atomic<int> count{0};
for (int i = 0; i != 1000; ++i) {
for (auto code : tile::AllHttpStatus) {
if (static_cast<int>(code) < 200) {
continue;
}
v.emplace_back(
client.AsyncGet(url + std::to_string(static_cast<int>(code)), options)
.Then([&](std::expected<tile::HttpResponse,
tile::HttpClient::ErrorCode> &&res) {
int cnt = count.fetch_add(1) + 1;
TILE_LOG_INFO_EVERY_SECOND("complete {}", cnt);
return res;
}));
}
}
int j = 0;
for (int i = 0; i != 1000; ++i) {
for (auto &code : tile::AllHttpStatus) {
if (static_cast<int>(code) < 200) {
continue;
}
auto resp = tile::future::BlockingGet(std::move(v[j++]));
EXPECT_TRUE(resp) << tile::HttpClient::ErrorCodeToString(resp.error());
EXPECT_EQ(resp->status(), code);
}
}
}
TEST(HttpClient, RequestNoWait) {
tile::HttpClient client;
tile::HttpClient::RequestOptions options;
options.timeout = std::chrono::seconds(20);
int cnt = 0;
for (int i = 0; i != 1000; ++i) {
for (auto code : tile::AllHttpStatus) {
if (static_cast<int>(code) < 200) {
continue;
}
++cnt;
}
}
tile::Latch latch(cnt);
std::atomic<int> count{0};
for (int i = 0; i != 1000; ++i) {
for (auto code : tile::AllHttpStatus) {
if (static_cast<int>(code) < 200) {
continue;
}
client.AsyncGet(url + std::to_string(static_cast<int>(code)), options)
.Then([&](std::expected<tile::HttpResponse,
tile::HttpClient::ErrorCode> &&) {
int cnt = count.fetch_add(1) + 1;
TILE_LOG_INFO_EVERY_SECOND("complete {}", cnt);
latch.CountDown();
});
}
}
latch.Wait();
}

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#!/usr/bin/python3
import http.server
import socket
import socketserver
from http.server import HTTPServer, BaseHTTPRequestHandler
PORT = 8000
class Request(BaseHTTPRequestHandler):
def do_GET(self):
code = int(self.path.split("/")[1])
self.send_response(code)
self.send_header('Content-type', 'text/plain')
self.end_headers()
class HTTPServer(socketserver.TCPServer):
def server_bind(self):
self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.socket.bind(self.server_address)
Handler = http.server.SimpleHTTPRequestHandler
with HTTPServer(("", PORT), Request) as httpd:
httpd.serve_forever()

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third_party/README.md vendored Normal file
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# Library
- [toml11](https://github.com/ToruNiina/toml11/archive/refs/tags/v4.2.0.tar.gz)

5
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---
Language: Cpp
BasedOnStyle: Google
PointerAlignment: Left
...

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third_party/benchmark/.clang-tidy vendored Normal file
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---
Checks: 'clang-analyzer-*,readability-redundant-*,performance-*'
WarningsAsErrors: 'clang-analyzer-*,readability-redundant-*,performance-*'
HeaderFilterRegex: '.*'
FormatStyle: none
User: user

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third_party/benchmark/.gitignore vendored Normal file
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*.a
*.so
*.so.?*
*.dll
*.exe
*.dylib
*.cmake
!/cmake/*.cmake
!/test/AssemblyTests.cmake
*~
*.swp
*.pyc
__pycache__
.DS_Store
# lcov
*.lcov
/lcov
# cmake files.
/Testing
CMakeCache.txt
CMakeFiles/
cmake_install.cmake
# makefiles.
Makefile
# in-source build.
bin/
lib/
/test/*_test
# exuberant ctags.
tags
# YouCompleteMe configuration.
.ycm_extra_conf.pyc
# ninja generated files.
.ninja_deps
.ninja_log
build.ninja
install_manifest.txt
rules.ninja
# bazel output symlinks.
bazel-*
MODULE.bazel.lock
# out-of-source build top-level folders.
build/
_build/
build*/
# in-source dependencies
/googletest/
# Visual Studio 2015/2017 cache/options directory
.vs/
CMakeSettings.json
# Visual Studio Code cache/options directory
.vscode/
# Python build stuff
dist/
*.egg-info*

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repos:
- repo: https://github.com/keith/pre-commit-buildifier
rev: 6.4.0
hooks:
- id: buildifier
- id: buildifier-lint
- repo: https://github.com/pre-commit/mirrors-mypy
rev: v1.8.0
hooks:
- id: mypy
types_or: [ python, pyi ]
args: [ "--ignore-missing-imports", "--scripts-are-modules" ]
- repo: https://github.com/astral-sh/ruff-pre-commit
rev: v0.3.1
hooks:
- id: ruff
args: [ --fix, --exit-non-zero-on-fix ]
- id: ruff-format

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sudo: required
dist: trusty
language: cpp
matrix:
include:
- compiler: gcc
addons:
apt:
packages:
- lcov
env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Coverage
- compiler: gcc
addons:
apt:
packages:
- g++-multilib
- libc6:i386
env:
- COMPILER=g++
- C_COMPILER=gcc
- BUILD_TYPE=Debug
- BUILD_32_BITS=ON
- EXTRA_FLAGS="-m32"
- compiler: gcc
addons:
apt:
packages:
- g++-multilib
- libc6:i386
env:
- COMPILER=g++
- C_COMPILER=gcc
- BUILD_TYPE=Release
- BUILD_32_BITS=ON
- EXTRA_FLAGS="-m32"
- compiler: gcc
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=g++-6 C_COMPILER=gcc-6 BUILD_TYPE=Debug
- ENABLE_SANITIZER=1
- EXTRA_FLAGS="-fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fuse-ld=gold"
# Clang w/ libc++
- compiler: clang
dist: xenial
addons:
apt:
packages:
clang-3.8
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
- LIBCXX_BUILD=1
- EXTRA_CXX_FLAGS="-stdlib=libc++"
- compiler: clang
dist: xenial
addons:
apt:
packages:
clang-3.8
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
- LIBCXX_BUILD=1
- EXTRA_CXX_FLAGS="-stdlib=libc++"
# Clang w/ 32bit libc++
- compiler: clang
dist: xenial
addons:
apt:
packages:
- clang-3.8
- g++-multilib
- libc6:i386
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
- LIBCXX_BUILD=1
- BUILD_32_BITS=ON
- EXTRA_FLAGS="-m32"
- EXTRA_CXX_FLAGS="-stdlib=libc++"
# Clang w/ 32bit libc++
- compiler: clang
dist: xenial
addons:
apt:
packages:
- clang-3.8
- g++-multilib
- libc6:i386
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
- LIBCXX_BUILD=1
- BUILD_32_BITS=ON
- EXTRA_FLAGS="-m32"
- EXTRA_CXX_FLAGS="-stdlib=libc++"
# Clang w/ libc++, ASAN, UBSAN
- compiler: clang
dist: xenial
addons:
apt:
packages:
clang-3.8
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
- LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
- ENABLE_SANITIZER=1
- EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=undefined,address -fno-sanitize-recover=all"
- EXTRA_CXX_FLAGS="-stdlib=libc++"
- UBSAN_OPTIONS=print_stacktrace=1
# Clang w/ libc++ and MSAN
- compiler: clang
dist: xenial
addons:
apt:
packages:
clang-3.8
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
- LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
- ENABLE_SANITIZER=1
- EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
- EXTRA_CXX_FLAGS="-stdlib=libc++"
# Clang w/ libc++ and MSAN
- compiler: clang
dist: xenial
addons:
apt:
packages:
clang-3.8
env:
- INSTALL_GCC6_FROM_PPA=1
- COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=RelWithDebInfo
- LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
- ENABLE_SANITIZER=1
- EXTRA_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
- EXTRA_CXX_FLAGS="-stdlib=libc++"
- os: osx
osx_image: xcode8.3
compiler: clang
env:
- COMPILER=clang++
- BUILD_TYPE=Release
- BUILD_32_BITS=ON
- EXTRA_FLAGS="-m32"
before_script:
- if [ -n "${LIBCXX_BUILD}" ]; then
source .libcxx-setup.sh;
fi
- if [ -n "${ENABLE_SANITIZER}" ]; then
export EXTRA_OPTIONS="-DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF";
else
export EXTRA_OPTIONS="";
fi
- mkdir -p build && cd build
before_install:
- if [ -z "$BUILD_32_BITS" ]; then
export BUILD_32_BITS=OFF && echo disabling 32 bit build;
fi
- if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test";
sudo apt-get update --option Acquire::Retries=100 --option Acquire::http::Timeout="60";
fi
install:
- if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
travis_wait sudo -E apt-get -yq --no-install-suggests --no-install-recommends install g++-6;
fi
- if [ "${TRAVIS_OS_NAME}" == "linux" -a "${BUILD_32_BITS}" == "OFF" ]; then
travis_wait sudo -E apt-get -y --no-install-suggests --no-install-recommends install llvm-3.9-tools;
sudo cp /usr/lib/llvm-3.9/bin/FileCheck /usr/local/bin/;
fi
- if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
PATH=~/.local/bin:${PATH};
pip install --user --upgrade pip;
travis_wait pip install --user cpp-coveralls;
fi
- if [ "${C_COMPILER}" == "gcc-7" -a "${TRAVIS_OS_NAME}" == "osx" ]; then
rm -f /usr/local/include/c++;
brew update;
travis_wait brew install gcc@7;
fi
- if [ "${TRAVIS_OS_NAME}" == "linux" ]; then
sudo apt-get update -qq;
sudo apt-get install -qq unzip cmake3;
wget https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-linux-x86_64.sh --output-document bazel-installer.sh;
travis_wait sudo bash bazel-installer.sh;
fi
- if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
curl -L -o bazel-installer.sh https://github.com/bazelbuild/bazel/releases/download/3.2.0/bazel-3.2.0-installer-darwin-x86_64.sh;
travis_wait sudo bash bazel-installer.sh;
fi
script:
- cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_C_FLAGS="${EXTRA_FLAGS}" -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS} ${EXTRA_CXX_FLAGS}" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON -DBENCHMARK_BUILD_32_BITS=${BUILD_32_BITS} ${EXTRA_OPTIONS} ..
- make
- ctest -C ${BUILD_TYPE} --output-on-failure
- bazel test -c dbg --define google_benchmark.have_regex=posix --announce_rc --verbose_failures --test_output=errors --keep_going //test/...
after_success:
- if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
coveralls --include src --include include --gcov-options '\-lp' --root .. --build-root .;
fi

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import os
import ycm_core
# These are the compilation flags that will be used in case there's no
# compilation database set (by default, one is not set).
# CHANGE THIS LIST OF FLAGS. YES, THIS IS THE DROID YOU HAVE BEEN LOOKING FOR.
flags = [
"-Wall",
"-Werror",
"-pedantic-errors",
"-std=c++0x",
"-fno-strict-aliasing",
"-O3",
"-DNDEBUG",
# ...and the same thing goes for the magic -x option which specifies the
# language that the files to be compiled are written in. This is mostly
# relevant for c++ headers.
# For a C project, you would set this to 'c' instead of 'c++'.
"-x",
"c++",
"-I",
"include",
"-isystem",
"/usr/include",
"-isystem",
"/usr/local/include",
]
# Set this to the absolute path to the folder (NOT the file!) containing the
# compile_commands.json file to use that instead of 'flags'. See here for
# more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
#
# Most projects will NOT need to set this to anything; you can just change the
# 'flags' list of compilation flags. Notice that YCM itself uses that approach.
compilation_database_folder = ""
if os.path.exists(compilation_database_folder):
database = ycm_core.CompilationDatabase(compilation_database_folder)
else:
database = None
SOURCE_EXTENSIONS = [".cc"]
def DirectoryOfThisScript():
return os.path.dirname(os.path.abspath(__file__))
def MakeRelativePathsInFlagsAbsolute(flags, working_directory):
if not working_directory:
return list(flags)
new_flags = []
make_next_absolute = False
path_flags = ["-isystem", "-I", "-iquote", "--sysroot="]
for flag in flags:
new_flag = flag
if make_next_absolute:
make_next_absolute = False
if not flag.startswith("/"):
new_flag = os.path.join(working_directory, flag)
for path_flag in path_flags:
if flag == path_flag:
make_next_absolute = True
break
if flag.startswith(path_flag):
path = flag[len(path_flag) :]
new_flag = path_flag + os.path.join(working_directory, path)
break
if new_flag:
new_flags.append(new_flag)
return new_flags
def IsHeaderFile(filename):
extension = os.path.splitext(filename)[1]
return extension in [".h", ".hxx", ".hpp", ".hh"]
def GetCompilationInfoForFile(filename):
# The compilation_commands.json file generated by CMake does not have entries
# for header files. So we do our best by asking the db for flags for a
# corresponding source file, if any. If one exists, the flags for that file
# should be good enough.
if IsHeaderFile(filename):
basename = os.path.splitext(filename)[0]
for extension in SOURCE_EXTENSIONS:
replacement_file = basename + extension
if os.path.exists(replacement_file):
compilation_info = database.GetCompilationInfoForFile(
replacement_file
)
if compilation_info.compiler_flags_:
return compilation_info
return None
return database.GetCompilationInfoForFile(filename)
def FlagsForFile(filename, **kwargs):
if database:
# Bear in mind that compilation_info.compiler_flags_ does NOT return a
# python list, but a "list-like" StringVec object
compilation_info = GetCompilationInfoForFile(filename)
if not compilation_info:
return None
final_flags = MakeRelativePathsInFlagsAbsolute(
compilation_info.compiler_flags_,
compilation_info.compiler_working_dir_,
)
else:
relative_to = DirectoryOfThisScript()
final_flags = MakeRelativePathsInFlagsAbsolute(flags, relative_to)
return {"flags": final_flags, "do_cache": True}

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# This is the official list of benchmark authors for copyright purposes.
# This file is distinct from the CONTRIBUTORS files.
# See the latter for an explanation.
#
# Names should be added to this file as:
# Name or Organization <email address>
# The email address is not required for organizations.
#
# Please keep the list sorted.
Albert Pretorius <pretoalb@gmail.com>
Alex Steele <steeleal123@gmail.com>
Andriy Berestovskyy <berestovskyy@gmail.com>
Arne Beer <arne@twobeer.de>
Carto
Cezary Skrzyński <czars1988@gmail.com>
Christian Wassermann <christian_wassermann@web.de>
Christopher Seymour <chris.j.seymour@hotmail.com>
Colin Braley <braley.colin@gmail.com>
Daniel Harvey <danielharvey458@gmail.com>
David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
Deniz Evrenci <denizevrenci@gmail.com>
Dirac Research
Dominik Czarnota <dominik.b.czarnota@gmail.com>
Dominik Korman <kormandominik@gmail.com>
Donald Aingworth <donalds_junk_mail@yahoo.com>
Eric Backus <eric_backus@alum.mit.edu>
Eric Fiselier <eric@efcs.ca>
Eugene Zhuk <eugene.zhuk@gmail.com>
Evgeny Safronov <division494@gmail.com>
Fabien Pichot <pichot.fabien@gmail.com>
Federico Ficarelli <federico.ficarelli@gmail.com>
Felix Homann <linuxaudio@showlabor.de>
Gergely Meszaros <maetveis@gmail.com>
Gergő Szitár <szitar.gergo@gmail.com>
Google Inc.
Henrique Bucher <hbucher@gmail.com>
International Business Machines Corporation
Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
Jern-Kuan Leong <jernkuan@gmail.com>
JianXiong Zhou <zhoujianxiong2@gmail.com>
Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
Jordan Williams <jwillikers@protonmail.com>
Jussi Knuuttila <jussi.knuuttila@gmail.com>
Kaito Udagawa <umireon@gmail.com>
Kishan Kumar <kumar.kishan@outlook.com>
Lei Xu <eddyxu@gmail.com>
Marcel Jacobse <mjacobse@uni-bremen.de>
Matt Clarkson <mattyclarkson@gmail.com>
Maxim Vafin <maxvafin@gmail.com>
Mike Apodaca <gatorfax@gmail.com>
Min-Yih Hsu <yihshyng223@gmail.com>
MongoDB Inc.
Nick Hutchinson <nshutchinson@gmail.com>
Norman Heino <norman.heino@gmail.com>
Oleksandr Sochka <sasha.sochka@gmail.com>
Ori Livneh <ori.livneh@gmail.com>
Paul Redmond <paul.redmond@gmail.com>
Radoslav Yovchev <radoslav.tm@gmail.com>
Raghu Raja <raghu@enfabrica.net>
Rainer Orth <ro@cebitec.uni-bielefeld.de>
Roman Lebedev <lebedev.ri@gmail.com>
Sayan Bhattacharjee <aero.sayan@gmail.com>
Shapr3D <google-contributors@shapr3d.com>
Shuo Chen <chenshuo@chenshuo.com>
Staffan Tjernstrom <staffantj@gmail.com>
Steinar H. Gunderson <sgunderson@bigfoot.com>
Stripe, Inc.
Tobias Schmidt <tobias.schmidt@in.tum.de>
Yixuan Qiu <yixuanq@gmail.com>
Yusuke Suzuki <utatane.tea@gmail.com>
Zbigniew Skowron <zbychs@gmail.com>

114
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licenses(["notice"])
COPTS = [
"-pedantic",
"-pedantic-errors",
"-std=c++11",
"-Wall",
"-Wconversion",
"-Wextra",
"-Wshadow",
# "-Wshorten-64-to-32",
"-Wfloat-equal",
"-fstrict-aliasing",
## assert() are used a lot in tests upstream, which may be optimised out leading to
## unused-variable warning.
"-Wno-unused-variable",
"-Werror=old-style-cast",
]
config_setting(
name = "qnx",
constraint_values = ["@platforms//os:qnx"],
values = {
"cpu": "x64_qnx",
},
visibility = [":__subpackages__"],
)
config_setting(
name = "windows",
constraint_values = ["@platforms//os:windows"],
values = {
"cpu": "x64_windows",
},
visibility = [":__subpackages__"],
)
config_setting(
name = "macos",
constraint_values = ["@platforms//os:macos"],
visibility = ["//visibility:public"],
)
config_setting(
name = "perfcounters",
define_values = {
"pfm": "1",
},
visibility = [":__subpackages__"],
)
cc_library(
name = "benchmark",
srcs = glob(
[
"src/*.cc",
"src/*.h",
],
exclude = ["src/benchmark_main.cc"],
),
hdrs = [
"include/benchmark/benchmark.h",
"include/benchmark/export.h",
],
copts = select({
":windows": [],
"//conditions:default": COPTS,
}),
defines = [
"BENCHMARK_STATIC_DEFINE",
"BENCHMARK_VERSION=\\\"" + (module_version() if module_version() != None else "") + "\\\"",
] + select({
":perfcounters": ["HAVE_LIBPFM"],
"//conditions:default": [],
}),
linkopts = select({
":windows": ["-DEFAULTLIB:shlwapi.lib"],
"//conditions:default": ["-pthread"],
}),
# Only static linking is allowed; no .so will be produced.
# Using `defines` (i.e. not `local_defines`) means that no
# dependent rules need to bother about defining the macro.
linkstatic = True,
local_defines = [
# Turn on Large-file Support
"_FILE_OFFSET_BITS=64",
"_LARGEFILE64_SOURCE",
"_LARGEFILE_SOURCE",
],
strip_include_prefix = "include",
visibility = ["//visibility:public"],
deps = select({
":perfcounters": ["@libpfm"],
"//conditions:default": [],
}),
)
cc_library(
name = "benchmark_main",
srcs = ["src/benchmark_main.cc"],
hdrs = [
"include/benchmark/benchmark.h",
"include/benchmark/export.h",
],
strip_include_prefix = "include",
visibility = ["//visibility:public"],
deps = [":benchmark"],
)
cc_library(
name = "benchmark_internal_headers",
hdrs = glob(["src/*.h"]),
visibility = ["//test:__pkg__"],
)

355
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# Require CMake 3.10. If available, use the policies up to CMake 3.22.
cmake_minimum_required (VERSION 3.10...3.22)
project (benchmark VERSION 1.8.4 LANGUAGES CXX)
option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." OFF)
option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
option(BENCHMARK_ENABLE_WERROR "Build Release candidates with -Werror." ON)
option(BENCHMARK_FORCE_WERROR "Build Release candidates with -Werror regardless of compiler issues." OFF)
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "PGI")
# PGC++ maybe reporting false positives.
set(BENCHMARK_ENABLE_WERROR OFF)
endif()
if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "NVHPC")
set(BENCHMARK_ENABLE_WERROR OFF)
endif()
if(BENCHMARK_FORCE_WERROR)
set(BENCHMARK_ENABLE_WERROR ON)
endif(BENCHMARK_FORCE_WERROR)
if(NOT (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC"))
option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
else()
set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
endif()
option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
option(BENCHMARK_ENABLE_DOXYGEN "Build documentation with Doxygen." OFF)
option(BENCHMARK_INSTALL_DOCS "Enable installation of documentation." OFF)
# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
# may require downloading the source code.
option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
# This option can be used to disable building and running unit tests which depend on gtest
# in cases where it is not possible to build or find a valid version of gtest.
option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" OFF)
option(BENCHMARK_USE_BUNDLED_GTEST "Use bundled GoogleTest. If disabled, the find_package(GTest) will be used." ON)
option(BENCHMARK_ENABLE_LIBPFM "Enable performance counters provided by libpfm" OFF)
# Export only public symbols
set(CMAKE_CXX_VISIBILITY_PRESET hidden)
set(CMAKE_VISIBILITY_INLINES_HIDDEN ON)
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# As of CMake 3.18, CMAKE_SYSTEM_PROCESSOR is not set properly for MSVC and
# cross-compilation (e.g. Host=x86_64, target=aarch64) requires using the
# undocumented, but working variable.
# See https://gitlab.kitware.com/cmake/cmake/-/issues/15170
set(CMAKE_SYSTEM_PROCESSOR ${MSVC_CXX_ARCHITECTURE_ID})
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "ARM")
set(CMAKE_CROSSCOMPILING TRUE)
endif()
endif()
set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
function(should_enable_assembly_tests)
if(CMAKE_BUILD_TYPE)
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
# FIXME: The --coverage flag needs to be removed when building assembly
# tests for this to work.
return()
endif()
endif()
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
return()
elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
return()
elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
# FIXME: Make these work on 32 bit builds
return()
elseif(BENCHMARK_BUILD_32_BITS)
# FIXME: Make these work on 32 bit builds
return()
endif()
find_program(LLVM_FILECHECK_EXE FileCheck)
if (LLVM_FILECHECK_EXE)
set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
else()
message(STATUS "Failed to find LLVM FileCheck")
return()
endif()
set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
endfunction()
should_enable_assembly_tests()
# This option disables the building and running of the assembly verification tests
option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
${ENABLE_ASSEMBLY_TESTS_DEFAULT})
# Make sure we can import out CMake functions
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
# Read the git tags to determine the project version
include(GetGitVersion)
get_git_version(GIT_VERSION)
# If no git version can be determined, use the version
# from the project() command
if ("${GIT_VERSION}" STREQUAL "0.0.0")
set(VERSION "v${benchmark_VERSION}")
else()
set(VERSION "${GIT_VERSION}")
endif()
# Normalize version: drop "v" prefix, replace first "-" with ".",
# drop everything after second "-" (including said "-").
string(STRIP ${VERSION} VERSION)
if(VERSION MATCHES v[^-]*-)
string(REGEX REPLACE "v([^-]*)-([0-9]+)-.*" "\\1.\\2" NORMALIZED_VERSION ${VERSION})
else()
string(REGEX REPLACE "v(.*)" "\\1" NORMALIZED_VERSION ${VERSION})
endif()
# Tell the user what versions we are using
message(STATUS "Google Benchmark version: ${VERSION}, normalized to ${NORMALIZED_VERSION}")
# The version of the libraries
set(GENERIC_LIB_VERSION ${NORMALIZED_VERSION})
string(SUBSTRING ${NORMALIZED_VERSION} 0 1 GENERIC_LIB_SOVERSION)
# Import our CMake modules
include(AddCXXCompilerFlag)
include(CheckCXXCompilerFlag)
include(CheckLibraryExists)
include(CXXFeatureCheck)
check_library_exists(rt shm_open "" HAVE_LIB_RT)
if (BENCHMARK_BUILD_32_BITS)
add_required_cxx_compiler_flag(-m32)
endif()
if (MSVC OR CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
set(BENCHMARK_CXX_STANDARD 14)
else()
set(BENCHMARK_CXX_STANDARD 11)
endif()
set(CMAKE_CXX_STANDARD ${BENCHMARK_CXX_STANDARD})
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_EXTENSIONS OFF)
if (MSVC)
# Turn compiler warnings up to 11
string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-EHs-)
add_cxx_compiler_flag(-EHa-)
add_definitions(-D_HAS_EXCEPTIONS=0)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
endif()
else()
# Turn on Large-file Support
add_definitions(-D_FILE_OFFSET_BITS=64)
add_definitions(-D_LARGEFILE64_SOURCE)
add_definitions(-D_LARGEFILE_SOURCE)
# Turn compiler warnings up to 11
add_cxx_compiler_flag(-Wall)
add_cxx_compiler_flag(-Wextra)
add_cxx_compiler_flag(-Wshadow)
add_cxx_compiler_flag(-Wfloat-equal)
add_cxx_compiler_flag(-Wold-style-cast)
add_cxx_compiler_flag(-Wconversion)
if(BENCHMARK_ENABLE_WERROR)
add_cxx_compiler_flag(-Werror)
endif()
if (NOT BENCHMARK_ENABLE_TESTING)
# Disable warning when compiling tests as gtest does not use 'override'.
add_cxx_compiler_flag(-Wsuggest-override)
endif()
add_cxx_compiler_flag(-pedantic)
add_cxx_compiler_flag(-pedantic-errors)
add_cxx_compiler_flag(-Wshorten-64-to-32)
add_cxx_compiler_flag(-fstrict-aliasing)
# Disable warnings regarding deprecated parts of the library while building
# and testing those parts of the library.
add_cxx_compiler_flag(-Wno-deprecated-declarations)
if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel" OR CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
# Intel silently ignores '-Wno-deprecated-declarations',
# warning no. 1786 must be explicitly disabled.
# See #631 for rationale.
add_cxx_compiler_flag(-wd1786)
add_cxx_compiler_flag(-fno-finite-math-only)
endif()
# Disable deprecation warnings for release builds (when -Werror is enabled).
if(BENCHMARK_ENABLE_WERROR)
add_cxx_compiler_flag(-Wno-deprecated)
endif()
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-fno-exceptions)
endif()
if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel" AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM") #ICC17u2: Many false positives for Wstrict-aliasing
add_cxx_compiler_flag(-Wstrict-aliasing)
endif()
endif()
# ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
# (because of deprecated overload)
add_cxx_compiler_flag(-wd654)
add_cxx_compiler_flag(-Wthread-safety)
if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
cxx_feature_check(THREAD_SAFETY_ATTRIBUTES "-DINCLUDE_DIRECTORIES=${PROJECT_SOURCE_DIR}/include")
endif()
# On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
# predefined macro, which turns on all of the wonderful libc extensions.
# However g++ doesn't do this in Cygwin so we have to define it ourselves
# since we depend on GNU/POSIX/BSD extensions.
if (CYGWIN)
add_definitions(-D_GNU_SOURCE=1)
endif()
if (QNXNTO)
add_definitions(-D_QNX_SOURCE)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
add_cxx_compiler_flag(-flto)
add_cxx_compiler_flag(-Wno-lto-type-mismatch)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
find_program(GCC_AR gcc-ar)
if (GCC_AR)
set(CMAKE_AR ${GCC_AR})
endif()
find_program(GCC_RANLIB gcc-ranlib)
if (GCC_RANLIB)
set(CMAKE_RANLIB ${GCC_RANLIB})
endif()
elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
include(llvm-toolchain)
endif()
endif()
# Coverage build type
set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE)
set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE)
set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE)
mark_as_advanced(
BENCHMARK_CXX_FLAGS_COVERAGE
BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
add_cxx_compiler_flag(--coverage COVERAGE)
endif()
if (BENCHMARK_USE_LIBCXX)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
add_cxx_compiler_flag(-stdlib=libc++)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "IntelLLVM")
add_cxx_compiler_flag(-nostdinc++)
message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
# Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
# configuration checks such as 'find_package(Threads)'
list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
# -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
# linker flags appear before all linker inputs and -lc++ must appear after.
list(APPEND BENCHMARK_CXX_LIBRARIES c++)
else()
message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
endif()
endif(BENCHMARK_USE_LIBCXX)
set(EXTRA_CXX_FLAGS "")
if (WIN32 AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
# Clang on Windows fails to compile the regex feature check under C++11
set(EXTRA_CXX_FLAGS "-DCMAKE_CXX_STANDARD=14")
endif()
# C++ feature checks
# Determine the correct regular expression engine to use
cxx_feature_check(STD_REGEX ${EXTRA_CXX_FLAGS})
cxx_feature_check(GNU_POSIX_REGEX ${EXTRA_CXX_FLAGS})
cxx_feature_check(POSIX_REGEX ${EXTRA_CXX_FLAGS})
if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
endif()
if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(WARNING "Using std::regex with exceptions disabled is not fully supported")
endif()
cxx_feature_check(STEADY_CLOCK)
# Ensure we have pthreads
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
cxx_feature_check(PTHREAD_AFFINITY)
if (BENCHMARK_ENABLE_LIBPFM)
find_package(PFM REQUIRED)
endif()
# Set up directories
include_directories(${PROJECT_SOURCE_DIR}/include)
# Build the targets
add_subdirectory(src)
if (BENCHMARK_ENABLE_TESTING)
enable_testing()
if (BENCHMARK_ENABLE_GTEST_TESTS AND
NOT (TARGET gtest AND TARGET gtest_main AND
TARGET gmock AND TARGET gmock_main))
if (BENCHMARK_USE_BUNDLED_GTEST)
include(GoogleTest)
else()
find_package(GTest CONFIG REQUIRED)
add_library(gtest ALIAS GTest::gtest)
add_library(gtest_main ALIAS GTest::gtest_main)
add_library(gmock ALIAS GTest::gmock)
add_library(gmock_main ALIAS GTest::gmock_main)
endif()
endif()
add_subdirectory(test)
endif()

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# How to contribute #
We'd love to accept your patches and contributions to this project. There are
a just a few small guidelines you need to follow.
## Contributor License Agreement ##
Contributions to any Google project must be accompanied by a Contributor
License Agreement. This is not a copyright **assignment**, it simply gives
Google permission to use and redistribute your contributions as part of the
project.
* If you are an individual writing original source code and you're sure you
own the intellectual property, then you'll need to sign an [individual
CLA][].
* If you work for a company that wants to allow you to contribute your work,
then you'll need to sign a [corporate CLA][].
You generally only need to submit a CLA once, so if you've already submitted
one (even if it was for a different project), you probably don't need to do it
again.
[individual CLA]: https://developers.google.com/open-source/cla/individual
[corporate CLA]: https://developers.google.com/open-source/cla/corporate
Once your CLA is submitted (or if you already submitted one for
another Google project), make a commit adding yourself to the
[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
of your first [pull request][].
[AUTHORS]: AUTHORS
[CONTRIBUTORS]: CONTRIBUTORS
## Submitting a patch ##
1. It's generally best to start by opening a new issue describing the bug or
feature you're intending to fix. Even if you think it's relatively minor,
it's helpful to know what people are working on. Mention in the initial
issue that you are planning to work on that bug or feature so that it can
be assigned to you.
1. Follow the normal process of [forking][] the project, and setup a new
branch to work in. It's important that each group of changes be done in
separate branches in order to ensure that a pull request only includes the
commits related to that bug or feature.
1. Do your best to have [well-formed commit messages][] for each change.
This provides consistency throughout the project, and ensures that commit
messages are able to be formatted properly by various git tools.
1. Finally, push the commits to your fork and submit a [pull request][].
[forking]: https://help.github.com/articles/fork-a-repo
[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
[pull request]: https://help.github.com/articles/creating-a-pull-request

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# People who have agreed to one of the CLAs and can contribute patches.
# The AUTHORS file lists the copyright holders; this file
# lists people. For example, Google employees are listed here
# but not in AUTHORS, because Google holds the copyright.
#
# Names should be added to this file only after verifying that
# the individual or the individual's organization has agreed to
# the appropriate Contributor License Agreement, found here:
#
# https://developers.google.com/open-source/cla/individual
# https://developers.google.com/open-source/cla/corporate
#
# The agreement for individuals can be filled out on the web.
#
# When adding J Random Contributor's name to this file,
# either J's name or J's organization's name should be
# added to the AUTHORS file, depending on whether the
# individual or corporate CLA was used.
#
# Names should be added to this file as:
# Name <email address>
#
# Please keep the list sorted.
Abhina Sreeskantharajan <abhina.sreeskantharajan@ibm.com>
Albert Pretorius <pretoalb@gmail.com>
Alex Steele <steelal123@gmail.com>
Andriy Berestovskyy <berestovskyy@gmail.com>
Arne Beer <arne@twobeer.de>
Bátor Tallér <bator.taller@shapr3d.com>
Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
Cezary Skrzyński <czars1988@gmail.com>
Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
Christian Wassermann <christian_wassermann@web.de>
Christopher Seymour <chris.j.seymour@hotmail.com>
Colin Braley <braley.colin@gmail.com>
Cyrille Faucheux <cyrille.faucheux@gmail.com>
Daniel Harvey <danielharvey458@gmail.com>
David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
Deniz Evrenci <denizevrenci@gmail.com>
Dominic Hamon <dma@stripysock.com> <dominic@google.com>
Dominik Czarnota <dominik.b.czarnota@gmail.com>
Dominik Korman <kormandominik@gmail.com>
Donald Aingworth <donalds_junk_mail@yahoo.com>
Eric Backus <eric_backus@alum.mit.edu>
Eric Fiselier <eric@efcs.ca>
Eugene Zhuk <eugene.zhuk@gmail.com>
Evgeny Safronov <division494@gmail.com>
Fabien Pichot <pichot.fabien@gmail.com>
Fanbo Meng <fanbo.meng@ibm.com>
Federico Ficarelli <federico.ficarelli@gmail.com>
Felix Homann <linuxaudio@showlabor.de>
Geoffrey Martin-Noble <gcmn@google.com> <gmngeoffrey@gmail.com>
Gergely Meszaros <maetveis@gmail.com>
Gergő Szitár <szitar.gergo@gmail.com>
Hannes Hauswedell <h2@fsfe.org>
Henrique Bucher <hbucher@gmail.com>
Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
Iakov Sergeev <yahontu@gmail.com>
Jern-Kuan Leong <jernkuan@gmail.com>
JianXiong Zhou <zhoujianxiong2@gmail.com>
Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
John Millikin <jmillikin@stripe.com>
Jordan Williams <jwillikers@protonmail.com>
Jussi Knuuttila <jussi.knuuttila@gmail.com>
Kaito Udagawa <umireon@gmail.com>
Kai Wolf <kai.wolf@gmail.com>
Kishan Kumar <kumar.kishan@outlook.com>
Lei Xu <eddyxu@gmail.com>
Marcel Jacobse <mjacobse@uni-bremen.de>
Matt Clarkson <mattyclarkson@gmail.com>
Maxim Vafin <maxvafin@gmail.com>
Mike Apodaca <gatorfax@gmail.com>
Min-Yih Hsu <yihshyng223@gmail.com>
Nick Hutchinson <nshutchinson@gmail.com>
Norman Heino <norman.heino@gmail.com>
Oleksandr Sochka <sasha.sochka@gmail.com>
Ori Livneh <ori.livneh@gmail.com>
Pascal Leroy <phl@google.com>
Paul Redmond <paul.redmond@gmail.com>
Pierre Phaneuf <pphaneuf@google.com>
Radoslav Yovchev <radoslav.tm@gmail.com>
Raghu Raja <raghu@enfabrica.net>
Rainer Orth <ro@cebitec.uni-bielefeld.de>
Raul Marin <rmrodriguez@cartodb.com>
Ray Glover <ray.glover@uk.ibm.com>
Robert Guo <robert.guo@mongodb.com>
Roman Lebedev <lebedev.ri@gmail.com>
Sayan Bhattacharjee <aero.sayan@gmail.com>
Shuo Chen <chenshuo@chenshuo.com>
Steven Wan <wan.yu@ibm.com>
Tobias Schmidt <tobias.schmidt@in.tum.de>
Tobias Ulvgård <tobias.ulvgard@dirac.se>
Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
Yixuan Qiu <yixuanq@gmail.com>
Yusuke Suzuki <utatane.tea@gmail.com>
Zbigniew Skowron <zbychs@gmail.com>

202
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Apache License
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41
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module(
name = "google_benchmark",
version = "1.8.4",
)
bazel_dep(name = "bazel_skylib", version = "1.5.0")
bazel_dep(name = "platforms", version = "0.0.8")
bazel_dep(name = "rules_foreign_cc", version = "0.10.1")
bazel_dep(name = "rules_cc", version = "0.0.9")
bazel_dep(name = "rules_python", version = "0.31.0", dev_dependency = True)
bazel_dep(name = "googletest", version = "1.12.1", dev_dependency = True, repo_name = "com_google_googletest")
bazel_dep(name = "libpfm", version = "4.11.0")
# Register a toolchain for Python 3.9 to be able to build numpy. Python
# versions >=3.10 are problematic.
# A second reason for this is to be able to build Python hermetically instead
# of relying on the changing default version from rules_python.
python = use_extension("@rules_python//python/extensions:python.bzl", "python", dev_dependency = True)
python.toolchain(python_version = "3.8")
python.toolchain(python_version = "3.9")
python.toolchain(python_version = "3.10")
python.toolchain(python_version = "3.11")
python.toolchain(
is_default = True,
python_version = "3.12",
)
pip = use_extension("@rules_python//python/extensions:pip.bzl", "pip", dev_dependency = True)
pip.parse(
hub_name = "tools_pip_deps",
python_version = "3.9",
requirements_lock = "//tools:requirements.txt",
)
use_repo(pip, "tools_pip_deps")
# -- bazel_dep definitions -- #
bazel_dep(name = "nanobind_bazel", version = "1.0.0", dev_dependency = True)

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# Benchmark
[![build-and-test](https://github.com/google/benchmark/workflows/build-and-test/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Abuild-and-test)
[![bazel](https://github.com/google/benchmark/actions/workflows/bazel.yml/badge.svg)](https://github.com/google/benchmark/actions/workflows/bazel.yml)
[![pylint](https://github.com/google/benchmark/workflows/pylint/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Apylint)
[![test-bindings](https://github.com/google/benchmark/workflows/test-bindings/badge.svg)](https://github.com/google/benchmark/actions?query=workflow%3Atest-bindings)
[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
[![Discord](https://discordapp.com/api/guilds/1125694995928719494/widget.png?style=shield)](https://discord.gg/cz7UX7wKC2)
A library to benchmark code snippets, similar to unit tests. Example:
```c++
#include <benchmark/benchmark.h>
static void BM_SomeFunction(benchmark::State& state) {
// Perform setup here
for (auto _ : state) {
// This code gets timed
SomeFunction();
}
}
// Register the function as a benchmark
BENCHMARK(BM_SomeFunction);
// Run the benchmark
BENCHMARK_MAIN();
```
## Getting Started
To get started, see [Requirements](#requirements) and
[Installation](#installation). See [Usage](#usage) for a full example and the
[User Guide](docs/user_guide.md) for a more comprehensive feature overview.
It may also help to read the [Google Test documentation](https://github.com/google/googletest/blob/main/docs/primer.md)
as some of the structural aspects of the APIs are similar.
## Resources
[Discussion group](https://groups.google.com/d/forum/benchmark-discuss)
IRC channels:
* [libera](https://libera.chat) #benchmark
[Additional Tooling Documentation](docs/tools.md)
[Assembly Testing Documentation](docs/AssemblyTests.md)
[Building and installing Python bindings](docs/python_bindings.md)
## Requirements
The library can be used with C++03. However, it requires C++11 to build,
including compiler and standard library support.
The following minimum versions are required to build the library:
* GCC 4.8
* Clang 3.4
* Visual Studio 14 2015
* Intel 2015 Update 1
See [Platform-Specific Build Instructions](docs/platform_specific_build_instructions.md).
## Installation
This describes the installation process using cmake. As pre-requisites, you'll
need git and cmake installed.
_See [dependencies.md](docs/dependencies.md) for more details regarding supported
versions of build tools._
```bash
# Check out the library.
$ git clone https://github.com/google/benchmark.git
# Go to the library root directory
$ cd benchmark
# Make a build directory to place the build output.
$ cmake -E make_directory "build"
# Generate build system files with cmake, and download any dependencies.
$ cmake -E chdir "build" cmake -DBENCHMARK_DOWNLOAD_DEPENDENCIES=on -DCMAKE_BUILD_TYPE=Release ../
# or, starting with CMake 3.13, use a simpler form:
# cmake -DCMAKE_BUILD_TYPE=Release -S . -B "build"
# Build the library.
$ cmake --build "build" --config Release
```
This builds the `benchmark` and `benchmark_main` libraries and tests.
On a unix system, the build directory should now look something like this:
```
/benchmark
/build
/src
/libbenchmark.a
/libbenchmark_main.a
/test
...
```
Next, you can run the tests to check the build.
```bash
$ cmake -E chdir "build" ctest --build-config Release
```
If you want to install the library globally, also run:
```
sudo cmake --build "build" --config Release --target install
```
Note that Google Benchmark requires Google Test to build and run the tests. This
dependency can be provided two ways:
* Checkout the Google Test sources into `benchmark/googletest`.
* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
configuration as above, the library will automatically download and build
any required dependencies.
If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
to `CMAKE_ARGS`.
### Debug vs Release
By default, benchmark builds as a debug library. You will see a warning in the
output when this is the case. To build it as a release library instead, add
`-DCMAKE_BUILD_TYPE=Release` when generating the build system files, as shown
above. The use of `--config Release` in build commands is needed to properly
support multi-configuration tools (like Visual Studio for example) and can be
skipped for other build systems (like Makefile).
To enable link-time optimisation, also add `-DBENCHMARK_ENABLE_LTO=true` when
generating the build system files.
If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake
cache variables, if autodetection fails.
If you are using clang, you may need to set `LLVMAR_EXECUTABLE`,
`LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
To enable sanitizer checks (eg., `asan` and `tsan`), add:
```
-DCMAKE_C_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=address -fsanitize=thread -fno-sanitize-recover=all"
-DCMAKE_CXX_FLAGS="-g -O2 -fno-omit-frame-pointer -fsanitize=address -fsanitize=thread -fno-sanitize-recover=all "
```
### Stable and Experimental Library Versions
The main branch contains the latest stable version of the benchmarking library;
the API of which can be considered largely stable, with source breaking changes
being made only upon the release of a new major version.
Newer, experimental, features are implemented and tested on the
[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
to use, test, and provide feedback on the new features are encouraged to try
this branch. However, this branch provides no stability guarantees and reserves
the right to change and break the API at any time.
## Usage
### Basic usage
Define a function that executes the code to measure, register it as a benchmark
function using the `BENCHMARK` macro, and ensure an appropriate `main` function
is available:
```c++
#include <benchmark/benchmark.h>
static void BM_StringCreation(benchmark::State& state) {
for (auto _ : state)
std::string empty_string;
}
// Register the function as a benchmark
BENCHMARK(BM_StringCreation);
// Define another benchmark
static void BM_StringCopy(benchmark::State& state) {
std::string x = "hello";
for (auto _ : state)
std::string copy(x);
}
BENCHMARK(BM_StringCopy);
BENCHMARK_MAIN();
```
To run the benchmark, compile and link against the `benchmark` library
(libbenchmark.a/.so). If you followed the build steps above, this library will
be under the build directory you created.
```bash
# Example on linux after running the build steps above. Assumes the
# `benchmark` and `build` directories are under the current directory.
$ g++ mybenchmark.cc -std=c++11 -isystem benchmark/include \
-Lbenchmark/build/src -lbenchmark -lpthread -o mybenchmark
```
Alternatively, link against the `benchmark_main` library and remove
`BENCHMARK_MAIN();` above to get the same behavior.
The compiled executable will run all benchmarks by default. Pass the `--help`
flag for option information or see the [User Guide](docs/user_guide.md).
### Usage with CMake
If using CMake, it is recommended to link against the project-provided
`benchmark::benchmark` and `benchmark::benchmark_main` targets using
`target_link_libraries`.
It is possible to use ```find_package``` to import an installed version of the
library.
```cmake
find_package(benchmark REQUIRED)
```
Alternatively, ```add_subdirectory``` will incorporate the library directly in
to one's CMake project.
```cmake
add_subdirectory(benchmark)
```
Either way, link to the library as follows.
```cmake
target_link_libraries(MyTarget benchmark::benchmark)
```

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workspace(name = "com_github_google_benchmark")
load("//:bazel/benchmark_deps.bzl", "benchmark_deps")
benchmark_deps()
load("@rules_foreign_cc//foreign_cc:repositories.bzl", "rules_foreign_cc_dependencies")
rules_foreign_cc_dependencies()
load("@rules_python//python:repositories.bzl", "py_repositories")
py_repositories()
load("@rules_python//python:pip.bzl", "pip_parse")
pip_parse(
name = "tools_pip_deps",
requirements_lock = "//tools:requirements.txt",
)
load("@tools_pip_deps//:requirements.bzl", "install_deps")
install_deps()

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# This file marks the root of the Bazel workspace.
# See MODULE.bazel for dependencies and setup.

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theme: jekyll-theme-midnight
markdown: GFM

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version: '{build}'
image: Visual Studio 2017
configuration:
- Debug
- Release
environment:
matrix:
- compiler: msvc-15-seh
generator: "Visual Studio 15 2017"
- compiler: msvc-15-seh
generator: "Visual Studio 15 2017 Win64"
- compiler: msvc-14-seh
generator: "Visual Studio 14 2015"
- compiler: msvc-14-seh
generator: "Visual Studio 14 2015 Win64"
- compiler: gcc-5.3.0-posix
generator: "MinGW Makefiles"
cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
matrix:
fast_finish: true
install:
# git bash conflicts with MinGW makefiles
- if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
- if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
build_script:
- md _build -Force
- cd _build
- echo %configuration%
- cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
- cmake --build . --config %configuration%
test_script:
- ctest --build-config %configuration% --timeout 300 --output-on-failure
artifacts:
- path: '_build/CMakeFiles/*.log'
name: logs
- path: '_build/Testing/**/*.xml'
name: test_results

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# - Adds a compiler flag if it is supported by the compiler
#
# This function checks that the supplied compiler flag is supported and then
# adds it to the corresponding compiler flags
#
# add_cxx_compiler_flag(<FLAG> [<VARIANT>])
#
# - Example
#
# include(AddCXXCompilerFlag)
# add_cxx_compiler_flag(-Wall)
# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
# Requires CMake 2.6+
if(__add_cxx_compiler_flag)
return()
endif()
set(__add_cxx_compiler_flag INCLUDED)
include(CheckCXXCompilerFlag)
function(mangle_compiler_flag FLAG OUTPUT)
string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
endfunction(mangle_compiler_flag)
function(add_cxx_compiler_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
if(${MANGLED_FLAG})
if(ARGC GREATER 1)
set(VARIANT ${ARGV1})
string(TOUPPER "_${VARIANT}" VARIANT)
else()
set(VARIANT "")
endif()
set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
endif()
endfunction()
function(add_required_cxx_compiler_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
if(${MANGLED_FLAG})
if(ARGC GREATER 1)
set(VARIANT ${ARGV1})
string(TOUPPER "_${VARIANT}" VARIANT)
else()
set(VARIANT "")
endif()
set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
else()
message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
endif()
endfunction()
function(check_cxx_warning_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
# Add -Werror to ensure the compiler generates an error if the warning flag
# doesn't exist.
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
endfunction()

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# - Compile and run code to check for C++ features
#
# This functions compiles a source file under the `cmake` folder
# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
# environment
#
# cxx_feature_check(<FLAG> [<VARIANT>])
#
# - Example
#
# include(CXXFeatureCheck)
# cxx_feature_check(STD_REGEX)
# Requires CMake 2.8.12+
if(__cxx_feature_check)
return()
endif()
set(__cxx_feature_check INCLUDED)
option(CXXFEATURECHECK_DEBUG OFF)
function(cxx_feature_check FILE)
string(TOLOWER ${FILE} FILE)
string(TOUPPER ${FILE} VAR)
string(TOUPPER "HAVE_${VAR}" FEATURE)
if (DEFINED HAVE_${VAR})
set(HAVE_${VAR} 1 PARENT_SCOPE)
add_definitions(-DHAVE_${VAR})
return()
endif()
set(FEATURE_CHECK_CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
if (ARGC GREATER 1)
message(STATUS "Enabling additional flags: ${ARGV1}")
list(APPEND FEATURE_CHECK_CMAKE_FLAGS ${ARGV1})
endif()
if (NOT DEFINED COMPILE_${FEATURE})
if(CMAKE_CROSSCOMPILING)
message(STATUS "Cross-compiling to test ${FEATURE}")
try_compile(COMPILE_${FEATURE}
${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
CXX_STANDARD 11
CXX_STANDARD_REQUIRED ON
CMAKE_FLAGS ${FEATURE_CHECK_CMAKE_FLAGS}
LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES}
OUTPUT_VARIABLE COMPILE_OUTPUT_VAR)
if(COMPILE_${FEATURE})
message(WARNING
"If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
set(RUN_${FEATURE} 0 CACHE INTERNAL "")
else()
set(RUN_${FEATURE} 1 CACHE INTERNAL "")
endif()
else()
message(STATUS "Compiling and running to test ${FEATURE}")
try_run(RUN_${FEATURE} COMPILE_${FEATURE}
${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
CXX_STANDARD 11
CXX_STANDARD_REQUIRED ON
CMAKE_FLAGS ${FEATURE_CHECK_CMAKE_FLAGS}
LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES}
COMPILE_OUTPUT_VARIABLE COMPILE_OUTPUT_VAR)
endif()
endif()
if(RUN_${FEATURE} EQUAL 0)
message(STATUS "Performing Test ${FEATURE} -- success")
set(HAVE_${VAR} 1 PARENT_SCOPE)
add_definitions(-DHAVE_${VAR})
else()
if(NOT COMPILE_${FEATURE})
if(CXXFEATURECHECK_DEBUG)
message(STATUS "Performing Test ${FEATURE} -- failed to compile: ${COMPILE_OUTPUT_VAR}")
else()
message(STATUS "Performing Test ${FEATURE} -- failed to compile")
endif()
else()
message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
endif()
endif()
endfunction()

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@PACKAGE_INIT@
include (CMakeFindDependencyMacro)
find_dependency (Threads)
include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")

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# - Returns a version string from Git tags
#
# This function inspects the annotated git tags for the project and returns a string
# into a CMake variable
#
# get_git_version(<var>)
#
# - Example
#
# include(GetGitVersion)
# get_git_version(GIT_VERSION)
#
# Requires CMake 2.8.11+
find_package(Git)
if(__get_git_version)
return()
endif()
set(__get_git_version INCLUDED)
function(get_git_version var)
if(GIT_EXECUTABLE)
execute_process(COMMAND ${GIT_EXECUTABLE} describe --tags --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8 --dirty
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
RESULT_VARIABLE status
OUTPUT_VARIABLE GIT_VERSION
ERROR_QUIET)
if(status)
set(GIT_VERSION "v0.0.0")
endif()
else()
set(GIT_VERSION "v0.0.0")
endif()
set(${var} ${GIT_VERSION} PARENT_SCOPE)
endfunction()

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# Download and unpack googletest at configure time
set(GOOGLETEST_PREFIX "${benchmark_BINARY_DIR}/third_party/googletest")
configure_file(${benchmark_SOURCE_DIR}/cmake/GoogleTest.cmake.in ${GOOGLETEST_PREFIX}/CMakeLists.txt @ONLY)
set(GOOGLETEST_PATH "${CMAKE_CURRENT_SOURCE_DIR}/googletest" CACHE PATH "") # Mind the quotes
execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
-DALLOW_DOWNLOADING_GOOGLETEST=${BENCHMARK_DOWNLOAD_DEPENDENCIES} -DGOOGLETEST_PATH:PATH=${GOOGLETEST_PATH} .
RESULT_VARIABLE result
WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
)
if(result)
message(FATAL_ERROR "CMake step for googletest failed: ${result}")
endif()
execute_process(
COMMAND ${CMAKE_COMMAND} --build .
RESULT_VARIABLE result
WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
)
if(result)
message(FATAL_ERROR "Build step for googletest failed: ${result}")
endif()
# Prevent overriding the parent project's compiler/linker
# settings on Windows
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
include(${GOOGLETEST_PREFIX}/googletest-paths.cmake)
# Add googletest directly to our build. This defines
# the gtest and gtest_main targets.
add_subdirectory(${GOOGLETEST_SOURCE_DIR}
${GOOGLETEST_BINARY_DIR}
EXCLUDE_FROM_ALL)
# googletest doesn't seem to want to stay build warning clean so let's not hurt ourselves.
if (MSVC)
target_compile_options(gtest PRIVATE "/wd4244" "/wd4722")
target_compile_options(gtest_main PRIVATE "/wd4244" "/wd4722")
target_compile_options(gmock PRIVATE "/wd4244" "/wd4722")
target_compile_options(gmock_main PRIVATE "/wd4244" "/wd4722")
else()
target_compile_options(gtest PRIVATE "-w")
target_compile_options(gtest_main PRIVATE "-w")
target_compile_options(gmock PRIVATE "-w")
target_compile_options(gmock_main PRIVATE "-w")
endif()
if(NOT DEFINED GTEST_COMPILE_COMMANDS)
set(GTEST_COMPILE_COMMANDS ON)
endif()
set_target_properties(gtest PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
set_target_properties(gtest_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
set_target_properties(gmock PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})
set_target_properties(gmock_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock_main,INTERFACE_INCLUDE_DIRECTORIES> EXPORT_COMPILE_COMMANDS ${GTEST_COMPILE_COMMANDS})

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cmake_minimum_required(VERSION 2.8.12)
project(googletest-download NONE)
# Enable ExternalProject CMake module
include(ExternalProject)
option(ALLOW_DOWNLOADING_GOOGLETEST "If googletest src tree is not found in location specified by GOOGLETEST_PATH, do fetch the archive from internet" OFF)
set(GOOGLETEST_PATH "/usr/src/googletest" CACHE PATH
"Path to the googletest root tree. Should contain googletest and googlemock subdirs. And CMakeLists.txt in root, and in both of these subdirs")
# Download and install GoogleTest
message(STATUS "Looking for Google Test sources")
message(STATUS "Looking for Google Test sources in ${GOOGLETEST_PATH}")
if(EXISTS "${GOOGLETEST_PATH}" AND IS_DIRECTORY "${GOOGLETEST_PATH}" AND EXISTS "${GOOGLETEST_PATH}/CMakeLists.txt" AND
EXISTS "${GOOGLETEST_PATH}/googletest" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googletest" AND EXISTS "${GOOGLETEST_PATH}/googletest/CMakeLists.txt" AND
EXISTS "${GOOGLETEST_PATH}/googlemock" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googlemock" AND EXISTS "${GOOGLETEST_PATH}/googlemock/CMakeLists.txt")
message(STATUS "Found Google Test in ${GOOGLETEST_PATH}")
ExternalProject_Add(
googletest
PREFIX "${CMAKE_BINARY_DIR}"
DOWNLOAD_DIR "${CMAKE_BINARY_DIR}/download"
SOURCE_DIR "${GOOGLETEST_PATH}" # use existing src dir.
BINARY_DIR "${CMAKE_BINARY_DIR}/build"
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
TEST_COMMAND ""
)
else()
if(NOT ALLOW_DOWNLOADING_GOOGLETEST)
message(SEND_ERROR "Did not find Google Test sources! Either pass correct path in GOOGLETEST_PATH, or enable BENCHMARK_DOWNLOAD_DEPENDENCIES, or disable BENCHMARK_USE_BUNDLED_GTEST, or disable BENCHMARK_ENABLE_GTEST_TESTS / BENCHMARK_ENABLE_TESTING.")
return()
else()
message(WARNING "Did not find Google Test sources! Fetching from web...")
ExternalProject_Add(
googletest
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG "release-1.11.0"
PREFIX "${CMAKE_BINARY_DIR}"
STAMP_DIR "${CMAKE_BINARY_DIR}/stamp"
DOWNLOAD_DIR "${CMAKE_BINARY_DIR}/download"
SOURCE_DIR "${CMAKE_BINARY_DIR}/src"
BINARY_DIR "${CMAKE_BINARY_DIR}/build"
CONFIGURE_COMMAND ""
BUILD_COMMAND ""
INSTALL_COMMAND ""
TEST_COMMAND ""
)
endif()
endif()
ExternalProject_Get_Property(googletest SOURCE_DIR BINARY_DIR)
file(WRITE googletest-paths.cmake
"set(GOOGLETEST_SOURCE_DIR \"${SOURCE_DIR}\")
set(GOOGLETEST_BINARY_DIR \"${BINARY_DIR}\")
")

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prefix=@CMAKE_INSTALL_PREFIX@
exec_prefix=${prefix}
libdir=@CMAKE_INSTALL_FULL_LIBDIR@
includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
Name: @PROJECT_NAME@
Description: Google microbenchmark framework
Version: @VERSION@
Libs: -L${libdir} -lbenchmark
Libs.private: -lpthread
Cflags: -I${includedir}

7
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libdir=@CMAKE_INSTALL_FULL_LIBDIR@
Name: @PROJECT_NAME@
Description: Google microbenchmark framework (with main() function)
Version: @VERSION@
Requires: benchmark
Libs: -L${libdir} -lbenchmark_main

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#include <gnuregex.h>
#include <string>
int main() {
std::string str = "test0159";
regex_t re;
int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
return ec;
}
return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
}

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find_package(LLVMAr REQUIRED)
set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
find_package(LLVMNm REQUIRED)
set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
find_package(LLVMRanLib REQUIRED)
set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)

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#include <regex.h>
#include <string>
int main() {
std::string str = "test0159";
regex_t re;
int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
return ec;
}
int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
regfree(&re);
return ret;
}

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#include <pthread.h>
int main() {
cpu_set_t set;
CPU_ZERO(&set);
for (int i = 0; i < CPU_SETSIZE; ++i) {
CPU_SET(i, &set);
CPU_CLR(i, &set);
}
pthread_t self = pthread_self();
int ret;
ret = pthread_getaffinity_np(self, sizeof(set), &set);
if (ret != 0) return ret;
ret = pthread_setaffinity_np(self, sizeof(set), &set);
if (ret != 0) return ret;
return 0;
}

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macro(split_list listname)
string(REPLACE ";" " " ${listname} "${${listname}}")
endmacro()

10
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#include <regex>
#include <string>
int main() {
const std::string str = "test0159";
std::regex re;
re = std::regex("^[a-z]+[0-9]+$",
std::regex_constants::extended | std::regex_constants::nosubs);
return std::regex_search(str, re) ? 0 : -1;
}

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#include <chrono>
int main() {
typedef std::chrono::steady_clock Clock;
Clock::time_point tp = Clock::now();
((void)tp);
}

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#define HAVE_THREAD_SAFETY_ATTRIBUTES
#include "../src/mutex.h"
int main() {}

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#ifndef BENCHMARK_EXPORT_H
#define BENCHMARK_EXPORT_H
#if defined(_WIN32)
#define EXPORT_ATTR __declspec(dllexport)
#define IMPORT_ATTR __declspec(dllimport)
#define NO_EXPORT_ATTR
#define DEPRECATED_ATTR __declspec(deprecated)
#else // _WIN32
#define EXPORT_ATTR __attribute__((visibility("default")))
#define IMPORT_ATTR __attribute__((visibility("default")))
#define NO_EXPORT_ATTR __attribute__((visibility("hidden")))
#define DEPRECATE_ATTR __attribute__((__deprecated__))
#endif // _WIN32
#ifdef BENCHMARK_STATIC_DEFINE
#define BENCHMARK_EXPORT
#define BENCHMARK_NO_EXPORT
#else // BENCHMARK_STATIC_DEFINE
#ifndef BENCHMARK_EXPORT
#ifdef benchmark_EXPORTS
/* We are building this library */
#define BENCHMARK_EXPORT EXPORT_ATTR
#else // benchmark_EXPORTS
/* We are using this library */
#define BENCHMARK_EXPORT IMPORT_ATTR
#endif // benchmark_EXPORTS
#endif // !BENCHMARK_EXPORT
#ifndef BENCHMARK_NO_EXPORT
#define BENCHMARK_NO_EXPORT NO_EXPORT_ATTR
#endif // !BENCHMARK_NO_EXPORT
#endif // BENCHMARK_STATIC_DEFINE
#ifndef BENCHMARK_DEPRECATED
#define BENCHMARK_DEPRECATED DEPRECATE_ATTR
#endif // BENCHMARK_DEPRECATED
#ifndef BENCHMARK_DEPRECATED_EXPORT
#define BENCHMARK_DEPRECATED_EXPORT BENCHMARK_EXPORT BENCHMARK_DEPRECATED
#endif // BENCHMARK_DEPRECATED_EXPORT
#ifndef BENCHMARK_DEPRECATED_NO_EXPORT
#define BENCHMARK_DEPRECATED_NO_EXPORT BENCHMARK_NO_EXPORT BENCHMARK_DEPRECATED
#endif // BENCHMARK_DEPRECATED_EXPORT
#endif /* BENCHMARK_EXPORT_H */

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[build-system]
requires = ["setuptools", "setuptools-scm[toml]", "wheel"]
build-backend = "setuptools.build_meta"
[project]
name = "google_benchmark"
description = "A library to benchmark code snippets."
requires-python = ">=3.8"
license = {file = "LICENSE"}
keywords = ["benchmark"]
authors = [
{name = "Google", email = "benchmark-discuss@googlegroups.com"},
]
classifiers = [
"Development Status :: 4 - Beta",
"Intended Audience :: Developers",
"Intended Audience :: Science/Research",
"License :: OSI Approved :: Apache Software License",
"Programming Language :: Python :: 3.8",
"Programming Language :: Python :: 3.9",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
"Programming Language :: Python :: 3.12",
"Topic :: Software Development :: Testing",
"Topic :: System :: Benchmark",
]
dynamic = ["readme", "version"]
dependencies = [
"absl-py>=0.7.1",
]
[project.optional-dependencies]
dev = [
"pre-commit>=3.3.3",
]
[project.urls]
Homepage = "https://github.com/google/benchmark"
Documentation = "https://github.com/google/benchmark/tree/main/docs"
Repository = "https://github.com/google/benchmark.git"
Discord = "https://discord.gg/cz7UX7wKC2"
[tool.setuptools]
package-dir = {"" = "bindings/python"}
zip-safe = false
[tool.setuptools.packages.find]
where = ["bindings/python"]
[tool.setuptools.dynamic]
readme = { file = "README.md", content-type = "text/markdown" }
[tool.setuptools_scm]
[tool.mypy]
check_untyped_defs = true
disallow_incomplete_defs = true
pretty = true
python_version = "3.11"
strict_optional = false
warn_unreachable = true
[[tool.mypy.overrides]]
module = ["yaml"]
ignore_missing_imports = true
[tool.ruff]
# explicitly tell ruff the source directory to correctly identify first-party package.
src = ["bindings/python"]
line-length = 80
target-version = "py311"
[tool.ruff.lint]
# Enable pycodestyle (`E`, `W`), Pyflakes (`F`), and isort (`I`) codes by default.
select = ["E", "F", "I", "W"]
ignore = [
"E501", # line too long
]
[tool.ruff.lint.isort]
combine-as-imports = true

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import contextlib
import os
import platform
import re
import shutil
from pathlib import Path
from typing import Any, Generator
import setuptools
from setuptools.command import build_ext
IS_WINDOWS = platform.system() == "Windows"
IS_MAC = platform.system() == "Darwin"
IS_LINUX = platform.system() == "Linux"
# hardcoded SABI-related options. Requires that each Python interpreter
# (hermetic or not) participating is of the same major-minor version.
version_tuple = tuple(int(i) for i in platform.python_version_tuple())
py_limited_api = version_tuple >= (3, 12)
options = {"bdist_wheel": {"py_limited_api": "cp312"}} if py_limited_api else {}
def is_cibuildwheel() -> bool:
return os.getenv("CIBUILDWHEEL") is not None
@contextlib.contextmanager
def _maybe_patch_toolchains() -> Generator[None, None, None]:
"""
Patch rules_python toolchains to ignore root user error
when run in a Docker container on Linux in cibuildwheel.
"""
def fmt_toolchain_args(matchobj):
suffix = "ignore_root_user_error = True"
callargs = matchobj.group(1)
# toolchain def is broken over multiple lines
if callargs.endswith("\n"):
callargs = callargs + " " + suffix + ",\n"
# toolchain def is on one line.
else:
callargs = callargs + ", " + suffix
return "python.toolchain(" + callargs + ")"
CIBW_LINUX = is_cibuildwheel() and IS_LINUX
try:
if CIBW_LINUX:
module_bazel = Path("MODULE.bazel")
content: str = module_bazel.read_text()
module_bazel.write_text(
re.sub(
r"python.toolchain\(([\w\"\s,.=]*)\)",
fmt_toolchain_args,
content,
)
)
yield
finally:
if CIBW_LINUX:
module_bazel.write_text(content)
class BazelExtension(setuptools.Extension):
"""A C/C++ extension that is defined as a Bazel BUILD target."""
def __init__(self, name: str, bazel_target: str, **kwargs: Any):
super().__init__(name=name, sources=[], **kwargs)
self.bazel_target = bazel_target
stripped_target = bazel_target.split("//")[-1]
self.relpath, self.target_name = stripped_target.split(":")
class BuildBazelExtension(build_ext.build_ext):
"""A command that runs Bazel to build a C/C++ extension."""
def run(self):
for ext in self.extensions:
self.bazel_build(ext)
super().run()
# explicitly call `bazel shutdown` for graceful exit
self.spawn(["bazel", "shutdown"])
def copy_extensions_to_source(self):
"""
Copy generated extensions into the source tree.
This is done in the ``bazel_build`` method, so it's not necessary to
do again in the `build_ext` base class.
"""
pass
def bazel_build(self, ext: BazelExtension) -> None:
"""Runs the bazel build to create the package."""
temp_path = Path(self.build_temp)
# omit the patch version to avoid build errors if the toolchain is not
# yet registered in the current @rules_python version.
# patch version differences should be fine.
python_version = ".".join(platform.python_version_tuple()[:2])
bazel_argv = [
"bazel",
"build",
ext.bazel_target,
f"--symlink_prefix={temp_path / 'bazel-'}",
f"--compilation_mode={'dbg' if self.debug else 'opt'}",
# C++17 is required by nanobind
f"--cxxopt={'/std:c++17' if IS_WINDOWS else '-std=c++17'}",
f"--@rules_python//python/config_settings:python_version={python_version}",
]
if ext.py_limited_api:
bazel_argv += ["--@nanobind_bazel//:py-limited-api=cp312"]
if IS_WINDOWS:
# Link with python*.lib.
for library_dir in self.library_dirs:
bazel_argv.append("--linkopt=/LIBPATH:" + library_dir)
elif IS_MAC:
# C++17 needs macOS 10.14 at minimum
bazel_argv.append("--macos_minimum_os=10.14")
with _maybe_patch_toolchains():
self.spawn(bazel_argv)
if IS_WINDOWS:
suffix = ".pyd"
else:
suffix = ".abi3.so" if ext.py_limited_api else ".so"
ext_name = ext.target_name + suffix
ext_bazel_bin_path = temp_path / "bazel-bin" / ext.relpath / ext_name
ext_dest_path = Path(self.get_ext_fullpath(ext.name)).with_name(
ext_name
)
shutil.copyfile(ext_bazel_bin_path, ext_dest_path)
setuptools.setup(
cmdclass=dict(build_ext=BuildBazelExtension),
ext_modules=[
BazelExtension(
name="google_benchmark._benchmark",
bazel_target="//bindings/python/google_benchmark:_benchmark",
py_limited_api=py_limited_api,
)
],
options=options,
)

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# Allow the source files to find headers in src/
include(GNUInstallDirs)
include_directories(${PROJECT_SOURCE_DIR}/src)
if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
endif()
file(GLOB
SOURCE_FILES
*.cc
${PROJECT_SOURCE_DIR}/include/benchmark/*.h
${CMAKE_CURRENT_SOURCE_DIR}/*.h)
file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
foreach(item ${BENCHMARK_MAIN})
list(REMOVE_ITEM SOURCE_FILES "${item}")
endforeach()
add_library(benchmark ${SOURCE_FILES})
add_library(benchmark::benchmark ALIAS benchmark)
set_target_properties(benchmark PROPERTIES
OUTPUT_NAME "benchmark"
VERSION ${GENERIC_LIB_VERSION}
SOVERSION ${GENERIC_LIB_SOVERSION}
)
target_include_directories(benchmark PUBLIC
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
)
set_property(
SOURCE benchmark.cc
APPEND
PROPERTY COMPILE_DEFINITIONS
BENCHMARK_VERSION="${VERSION}"
)
# libpfm, if available
if (PFM_FOUND)
target_link_libraries(benchmark PRIVATE PFM::libpfm)
target_compile_definitions(benchmark PRIVATE -DHAVE_LIBPFM)
endif()
# pthread affinity, if available
if(HAVE_PTHREAD_AFFINITY)
target_compile_definitions(benchmark PRIVATE -DBENCHMARK_HAS_PTHREAD_AFFINITY)
endif()
# Link threads.
target_link_libraries(benchmark PRIVATE Threads::Threads)
target_link_libraries(benchmark PRIVATE ${BENCHMARK_CXX_LIBRARIES})
if(HAVE_LIB_RT)
target_link_libraries(benchmark PRIVATE rt)
endif(HAVE_LIB_RT)
# We need extra libraries on Windows
if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
target_link_libraries(benchmark PRIVATE shlwapi)
endif()
# We need extra libraries on Solaris
if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
target_link_libraries(benchmark PRIVATE kstat)
endif()
if (NOT BUILD_SHARED_LIBS)
target_compile_definitions(benchmark PUBLIC -DBENCHMARK_STATIC_DEFINE)
endif()
# Benchmark main library
add_library(benchmark_main "benchmark_main.cc")
add_library(benchmark::benchmark_main ALIAS benchmark_main)
set_target_properties(benchmark_main PROPERTIES
OUTPUT_NAME "benchmark_main"
VERSION ${GENERIC_LIB_VERSION}
SOVERSION ${GENERIC_LIB_SOVERSION}
DEFINE_SYMBOL benchmark_EXPORTS
)
target_link_libraries(benchmark_main PUBLIC benchmark::benchmark)
set(generated_dir "${PROJECT_BINARY_DIR}")
set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
set(pkg_config_main "${generated_dir}/${PROJECT_NAME}_main.pc")
set(targets_to_export benchmark benchmark_main)
set(targets_export_name "${PROJECT_NAME}Targets")
set(namespace "${PROJECT_NAME}::")
include(CMakePackageConfigHelpers)
configure_package_config_file (
${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in
${project_config}
INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
NO_SET_AND_CHECK_MACRO
NO_CHECK_REQUIRED_COMPONENTS_MACRO
)
write_basic_package_version_file(
"${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
)
configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark_main.pc.in" "${pkg_config_main}" @ONLY)
export (
TARGETS ${targets_to_export}
NAMESPACE "${namespace}"
FILE ${generated_dir}/${targets_export_name}.cmake
)
if (BENCHMARK_ENABLE_INSTALL)
# Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
install(
TARGETS ${targets_to_export}
EXPORT ${targets_export_name}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(
DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
"${PROJECT_BINARY_DIR}/include/benchmark"
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
FILES_MATCHING PATTERN "*.*h")
install(
FILES "${project_config}" "${version_config}"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
install(
FILES "${pkg_config}" "${pkg_config_main}"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
install(
EXPORT "${targets_export_name}"
NAMESPACE "${namespace}"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
endif()
if (BENCHMARK_ENABLE_DOXYGEN)
find_package(Doxygen REQUIRED)
set(DOXYGEN_QUIET YES)
set(DOXYGEN_RECURSIVE YES)
set(DOXYGEN_GENERATE_HTML YES)
set(DOXYGEN_GENERATE_MAN NO)
set(DOXYGEN_MARKDOWN_SUPPORT YES)
set(DOXYGEN_BUILTIN_STL_SUPPORT YES)
set(DOXYGEN_EXTRACT_PACKAGE YES)
set(DOXYGEN_EXTRACT_STATIC YES)
set(DOXYGEN_SHOW_INCLUDE_FILES YES)
set(DOXYGEN_BINARY_TOC YES)
set(DOXYGEN_TOC_EXPAND YES)
set(DOXYGEN_USE_MDFILE_AS_MAINPAGE "index.md")
doxygen_add_docs(benchmark_doxygen
docs
include
src
ALL
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
COMMENT "Building documentation with Doxygen.")
if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
install(
DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/html/"
DESTINATION ${CMAKE_INSTALL_DOCDIR})
endif()
else()
if (BENCHMARK_ENABLE_INSTALL AND BENCHMARK_INSTALL_DOCS)
install(
DIRECTORY "${PROJECT_SOURCE_DIR}/docs/"
DESTINATION ${CMAKE_INSTALL_DOCDIR})
endif()
endif()

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#ifndef BENCHMARK_ARRAYSIZE_H_
#define BENCHMARK_ARRAYSIZE_H_
#include "internal_macros.h"
namespace benchmark {
namespace internal {
// The arraysize(arr) macro returns the # of elements in an array arr.
// The expression is a compile-time constant, and therefore can be
// used in defining new arrays, for example. If you use arraysize on
// a pointer by mistake, you will get a compile-time error.
//
// This template function declaration is used in defining arraysize.
// Note that the function doesn't need an implementation, as we only
// use its type.
template <typename T, size_t N>
char (&ArraySizeHelper(T (&array)[N]))[N];
// That gcc wants both of these prototypes seems mysterious. VC, for
// its part, can't decide which to use (another mystery). Matching of
// template overloads: the final frontier.
#ifndef COMPILER_MSVC
template <typename T, size_t N>
char (&ArraySizeHelper(const T (&array)[N]))[N];
#endif
#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
} // end namespace internal
} // end namespace benchmark
#endif // BENCHMARK_ARRAYSIZE_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "benchmark_api_internal.h"
#include "benchmark_runner.h"
#include "internal_macros.h"
#ifndef BENCHMARK_OS_WINDOWS
#if !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <atomic>
#include <condition_variable>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <limits>
#include <map>
#include <memory>
#include <random>
#include <string>
#include <thread>
#include <utility>
#include "check.h"
#include "colorprint.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "counter.h"
#include "internal_macros.h"
#include "log.h"
#include "mutex.h"
#include "perf_counters.h"
#include "re.h"
#include "statistics.h"
#include "string_util.h"
#include "thread_manager.h"
#include "thread_timer.h"
namespace benchmark {
// Print a list of benchmarks. This option overrides all other options.
BM_DEFINE_bool(benchmark_list_tests, false);
// A regular expression that specifies the set of benchmarks to execute. If
// this flag is empty, or if this flag is the string \"all\", all benchmarks
// linked into the binary are run.
BM_DEFINE_string(benchmark_filter, "");
// Specification of how long to run the benchmark.
//
// It can be either an exact number of iterations (specified as `<integer>x`),
// or a minimum number of seconds (specified as `<float>s`). If the latter
// format (ie., min seconds) is used, the system may run the benchmark longer
// until the results are considered significant.
//
// For backward compatibility, the `s` suffix may be omitted, in which case,
// the specified number is interpreted as the number of seconds.
//
// For cpu-time based tests, this is the lower bound
// on the total cpu time used by all threads that make up the test. For
// real-time based tests, this is the lower bound on the elapsed time of the
// benchmark execution, regardless of number of threads.
BM_DEFINE_string(benchmark_min_time, kDefaultMinTimeStr);
// Minimum number of seconds a benchmark should be run before results should be
// taken into account. This e.g can be necessary for benchmarks of code which
// needs to fill some form of cache before performance is of interest.
// Note: results gathered within this period are discarded and not used for
// reported result.
BM_DEFINE_double(benchmark_min_warmup_time, 0.0);
// The number of runs of each benchmark. If greater than 1, the mean and
// standard deviation of the runs will be reported.
BM_DEFINE_int32(benchmark_repetitions, 1);
// If set, enable random interleaving of repetitions of all benchmarks.
// See http://github.com/google/benchmark/issues/1051 for details.
BM_DEFINE_bool(benchmark_enable_random_interleaving, false);
// Report the result of each benchmark repetitions. When 'true' is specified
// only the mean, standard deviation, and other statistics are reported for
// repeated benchmarks. Affects all reporters.
BM_DEFINE_bool(benchmark_report_aggregates_only, false);
// Display the result of each benchmark repetitions. When 'true' is specified
// only the mean, standard deviation, and other statistics are displayed for
// repeated benchmarks. Unlike benchmark_report_aggregates_only, only affects
// the display reporter, but *NOT* file reporter, which will still contain
// all the output.
BM_DEFINE_bool(benchmark_display_aggregates_only, false);
// The format to use for console output.
// Valid values are 'console', 'json', or 'csv'.
BM_DEFINE_string(benchmark_format, "console");
// The format to use for file output.
// Valid values are 'console', 'json', or 'csv'.
BM_DEFINE_string(benchmark_out_format, "json");
// The file to write additional output to.
BM_DEFINE_string(benchmark_out, "");
// Whether to use colors in the output. Valid values:
// 'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use colors if
// the output is being sent to a terminal and the TERM environment variable is
// set to a terminal type that supports colors.
BM_DEFINE_string(benchmark_color, "auto");
// Whether to use tabular format when printing user counters to the console.
// Valid values: 'true'/'yes'/1, 'false'/'no'/0. Defaults to false.
BM_DEFINE_bool(benchmark_counters_tabular, false);
// List of additional perf counters to collect, in libpfm format. For more
// information about libpfm: https://man7.org/linux/man-pages/man3/libpfm.3.html
BM_DEFINE_string(benchmark_perf_counters, "");
// Extra context to include in the output formatted as comma-separated key-value
// pairs. Kept internal as it's only used for parsing from env/command line.
BM_DEFINE_kvpairs(benchmark_context, {});
// Set the default time unit to use for reports
// Valid values are 'ns', 'us', 'ms' or 's'
BM_DEFINE_string(benchmark_time_unit, "");
// The level of verbose logging to output
BM_DEFINE_int32(v, 0);
namespace internal {
std::map<std::string, std::string>* global_context = nullptr;
BENCHMARK_EXPORT std::map<std::string, std::string>*& GetGlobalContext() {
return global_context;
}
static void const volatile* volatile global_force_escape_pointer;
// FIXME: Verify if LTO still messes this up?
void UseCharPointer(char const volatile* const v) {
// We want to escape the pointer `v` so that the compiler can not eliminate
// computations that produced it. To do that, we escape the pointer by storing
// it into a volatile variable, since generally, volatile store, is not
// something the compiler is allowed to elide.
global_force_escape_pointer = reinterpret_cast<void const volatile*>(v);
}
} // namespace internal
State::State(std::string name, IterationCount max_iters,
const std::vector<int64_t>& ranges, int thread_i, int n_threads,
internal::ThreadTimer* timer, internal::ThreadManager* manager,
internal::PerfCountersMeasurement* perf_counters_measurement)
: total_iterations_(0),
batch_leftover_(0),
max_iterations(max_iters),
started_(false),
finished_(false),
skipped_(internal::NotSkipped),
range_(ranges),
complexity_n_(0),
name_(std::move(name)),
thread_index_(thread_i),
threads_(n_threads),
timer_(timer),
manager_(manager),
perf_counters_measurement_(perf_counters_measurement) {
BM_CHECK(max_iterations != 0) << "At least one iteration must be run";
BM_CHECK_LT(thread_index_, threads_)
<< "thread_index must be less than threads";
// Add counters with correct flag now. If added with `counters[name]` in
// `PauseTiming`, a new `Counter` will be inserted the first time, which
// won't have the flag. Inserting them now also reduces the allocations
// during the benchmark.
if (perf_counters_measurement_) {
for (const std::string& counter_name :
perf_counters_measurement_->names()) {
counters[counter_name] = Counter(0.0, Counter::kAvgIterations);
}
}
// Note: The use of offsetof below is technically undefined until C++17
// because State is not a standard layout type. However, all compilers
// currently provide well-defined behavior as an extension (which is
// demonstrated since constexpr evaluation must diagnose all undefined
// behavior). However, GCC and Clang also warn about this use of offsetof,
// which must be suppressed.
#if defined(__INTEL_COMPILER)
#pragma warning push
#pragma warning(disable : 1875)
#elif defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Winvalid-offsetof"
#endif
#if defined(__NVCC__)
#pragma nv_diagnostic push
#pragma nv_diag_suppress 1427
#endif
#if defined(__NVCOMPILER)
#pragma diagnostic push
#pragma diag_suppress offset_in_non_POD_nonstandard
#endif
// Offset tests to ensure commonly accessed data is on the first cache line.
const int cache_line_size = 64;
static_assert(
offsetof(State, skipped_) <= (cache_line_size - sizeof(skipped_)), "");
#if defined(__INTEL_COMPILER)
#pragma warning pop
#elif defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#if defined(__NVCC__)
#pragma nv_diagnostic pop
#endif
#if defined(__NVCOMPILER)
#pragma diagnostic pop
#endif
}
void State::PauseTiming() {
// Add in time accumulated so far
BM_CHECK(started_ && !finished_ && !skipped());
timer_->StopTimer();
if (perf_counters_measurement_) {
std::vector<std::pair<std::string, double>> measurements;
if (!perf_counters_measurement_->Stop(measurements)) {
BM_CHECK(false) << "Perf counters read the value failed.";
}
for (const auto& name_and_measurement : measurements) {
const std::string& name = name_and_measurement.first;
const double measurement = name_and_measurement.second;
// Counter was inserted with `kAvgIterations` flag by the constructor.
assert(counters.find(name) != counters.end());
counters[name].value += measurement;
}
}
}
void State::ResumeTiming() {
BM_CHECK(started_ && !finished_ && !skipped());
timer_->StartTimer();
if (perf_counters_measurement_) {
perf_counters_measurement_->Start();
}
}
void State::SkipWithMessage(const std::string& msg) {
skipped_ = internal::SkippedWithMessage;
{
MutexLock l(manager_->GetBenchmarkMutex());
if (internal::NotSkipped == manager_->results.skipped_) {
manager_->results.skip_message_ = msg;
manager_->results.skipped_ = skipped_;
}
}
total_iterations_ = 0;
if (timer_->running()) timer_->StopTimer();
}
void State::SkipWithError(const std::string& msg) {
skipped_ = internal::SkippedWithError;
{
MutexLock l(manager_->GetBenchmarkMutex());
if (internal::NotSkipped == manager_->results.skipped_) {
manager_->results.skip_message_ = msg;
manager_->results.skipped_ = skipped_;
}
}
total_iterations_ = 0;
if (timer_->running()) timer_->StopTimer();
}
void State::SetIterationTime(double seconds) {
timer_->SetIterationTime(seconds);
}
void State::SetLabel(const std::string& label) {
MutexLock l(manager_->GetBenchmarkMutex());
manager_->results.report_label_ = label;
}
void State::StartKeepRunning() {
BM_CHECK(!started_ && !finished_);
started_ = true;
total_iterations_ = skipped() ? 0 : max_iterations;
manager_->StartStopBarrier();
if (!skipped()) ResumeTiming();
}
void State::FinishKeepRunning() {
BM_CHECK(started_ && (!finished_ || skipped()));
if (!skipped()) {
PauseTiming();
}
// Total iterations has now wrapped around past 0. Fix this.
total_iterations_ = 0;
finished_ = true;
manager_->StartStopBarrier();
}
namespace internal {
namespace {
// Flushes streams after invoking reporter methods that write to them. This
// ensures users get timely updates even when streams are not line-buffered.
void FlushStreams(BenchmarkReporter* reporter) {
if (!reporter) return;
std::flush(reporter->GetOutputStream());
std::flush(reporter->GetErrorStream());
}
// Reports in both display and file reporters.
void Report(BenchmarkReporter* display_reporter,
BenchmarkReporter* file_reporter, const RunResults& run_results) {
auto report_one = [](BenchmarkReporter* reporter, bool aggregates_only,
const RunResults& results) {
assert(reporter);
// If there are no aggregates, do output non-aggregates.
aggregates_only &= !results.aggregates_only.empty();
if (!aggregates_only) reporter->ReportRuns(results.non_aggregates);
if (!results.aggregates_only.empty())
reporter->ReportRuns(results.aggregates_only);
};
report_one(display_reporter, run_results.display_report_aggregates_only,
run_results);
if (file_reporter)
report_one(file_reporter, run_results.file_report_aggregates_only,
run_results);
FlushStreams(display_reporter);
FlushStreams(file_reporter);
}
void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks,
BenchmarkReporter* display_reporter,
BenchmarkReporter* file_reporter) {
// Note the file_reporter can be null.
BM_CHECK(display_reporter != nullptr);
// Determine the width of the name field using a minimum width of 10.
bool might_have_aggregates = FLAGS_benchmark_repetitions > 1;
size_t name_field_width = 10;
size_t stat_field_width = 0;
for (const BenchmarkInstance& benchmark : benchmarks) {
name_field_width =
std::max<size_t>(name_field_width, benchmark.name().str().size());
might_have_aggregates |= benchmark.repetitions() > 1;
for (const auto& Stat : benchmark.statistics())
stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
}
if (might_have_aggregates) name_field_width += 1 + stat_field_width;
// Print header here
BenchmarkReporter::Context context;
context.name_field_width = name_field_width;
// Keep track of running times of all instances of each benchmark family.
std::map<int /*family_index*/, BenchmarkReporter::PerFamilyRunReports>
per_family_reports;
if (display_reporter->ReportContext(context) &&
(!file_reporter || file_reporter->ReportContext(context))) {
FlushStreams(display_reporter);
FlushStreams(file_reporter);
size_t num_repetitions_total = 0;
// This perfcounters object needs to be created before the runners vector
// below so it outlasts their lifetime.
PerfCountersMeasurement perfcounters(
StrSplit(FLAGS_benchmark_perf_counters, ','));
// Vector of benchmarks to run
std::vector<internal::BenchmarkRunner> runners;
runners.reserve(benchmarks.size());
// Count the number of benchmarks with threads to warn the user in case
// performance counters are used.
int benchmarks_with_threads = 0;
// Loop through all benchmarks
for (const BenchmarkInstance& benchmark : benchmarks) {
BenchmarkReporter::PerFamilyRunReports* reports_for_family = nullptr;
if (benchmark.complexity() != oNone)
reports_for_family = &per_family_reports[benchmark.family_index()];
benchmarks_with_threads += (benchmark.threads() > 1);
runners.emplace_back(benchmark, &perfcounters, reports_for_family);
int num_repeats_of_this_instance = runners.back().GetNumRepeats();
num_repetitions_total +=
static_cast<size_t>(num_repeats_of_this_instance);
if (reports_for_family)
reports_for_family->num_runs_total += num_repeats_of_this_instance;
}
assert(runners.size() == benchmarks.size() && "Unexpected runner count.");
// The use of performance counters with threads would be unintuitive for
// the average user so we need to warn them about this case
if ((benchmarks_with_threads > 0) && (perfcounters.num_counters() > 0)) {
GetErrorLogInstance()
<< "***WARNING*** There are " << benchmarks_with_threads
<< " benchmarks with threads and " << perfcounters.num_counters()
<< " performance counters were requested. Beware counters will "
"reflect the combined usage across all "
"threads.\n";
}
std::vector<size_t> repetition_indices;
repetition_indices.reserve(num_repetitions_total);
for (size_t runner_index = 0, num_runners = runners.size();
runner_index != num_runners; ++runner_index) {
const internal::BenchmarkRunner& runner = runners[runner_index];
std::fill_n(std::back_inserter(repetition_indices),
runner.GetNumRepeats(), runner_index);
}
assert(repetition_indices.size() == num_repetitions_total &&
"Unexpected number of repetition indexes.");
if (FLAGS_benchmark_enable_random_interleaving) {
std::random_device rd;
std::mt19937 g(rd());
std::shuffle(repetition_indices.begin(), repetition_indices.end(), g);
}
for (size_t repetition_index : repetition_indices) {
internal::BenchmarkRunner& runner = runners[repetition_index];
runner.DoOneRepetition();
if (runner.HasRepeatsRemaining()) continue;
// FIXME: report each repetition separately, not all of them in bulk.
display_reporter->ReportRunsConfig(
runner.GetMinTime(), runner.HasExplicitIters(), runner.GetIters());
if (file_reporter)
file_reporter->ReportRunsConfig(
runner.GetMinTime(), runner.HasExplicitIters(), runner.GetIters());
RunResults run_results = runner.GetResults();
// Maybe calculate complexity report
if (const auto* reports_for_family = runner.GetReportsForFamily()) {
if (reports_for_family->num_runs_done ==
reports_for_family->num_runs_total) {
auto additional_run_stats = ComputeBigO(reports_for_family->Runs);
run_results.aggregates_only.insert(run_results.aggregates_only.end(),
additional_run_stats.begin(),
additional_run_stats.end());
per_family_reports.erase(
static_cast<int>(reports_for_family->Runs.front().family_index));
}
}
Report(display_reporter, file_reporter, run_results);
}
}
display_reporter->Finalize();
if (file_reporter) file_reporter->Finalize();
FlushStreams(display_reporter);
FlushStreams(file_reporter);
}
// Disable deprecated warnings temporarily because we need to reference
// CSVReporter but don't want to trigger -Werror=-Wdeprecated-declarations
BENCHMARK_DISABLE_DEPRECATED_WARNING
std::unique_ptr<BenchmarkReporter> CreateReporter(
std::string const& name, ConsoleReporter::OutputOptions output_opts) {
typedef std::unique_ptr<BenchmarkReporter> PtrType;
if (name == "console") {
return PtrType(new ConsoleReporter(output_opts));
}
if (name == "json") {
return PtrType(new JSONReporter());
}
if (name == "csv") {
return PtrType(new CSVReporter());
}
std::cerr << "Unexpected format: '" << name << "'\n";
std::exit(1);
}
BENCHMARK_RESTORE_DEPRECATED_WARNING
} // end namespace
bool IsZero(double n) {
return std::abs(n) < std::numeric_limits<double>::epsilon();
}
ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
int output_opts = ConsoleReporter::OO_Defaults;
auto is_benchmark_color = [force_no_color]() -> bool {
if (force_no_color) {
return false;
}
if (FLAGS_benchmark_color == "auto") {
return IsColorTerminal();
}
return IsTruthyFlagValue(FLAGS_benchmark_color);
};
if (is_benchmark_color()) {
output_opts |= ConsoleReporter::OO_Color;
} else {
output_opts &= ~ConsoleReporter::OO_Color;
}
if (FLAGS_benchmark_counters_tabular) {
output_opts |= ConsoleReporter::OO_Tabular;
} else {
output_opts &= ~ConsoleReporter::OO_Tabular;
}
return static_cast<ConsoleReporter::OutputOptions>(output_opts);
}
} // end namespace internal
BenchmarkReporter* CreateDefaultDisplayReporter() {
static auto default_display_reporter =
internal::CreateReporter(FLAGS_benchmark_format,
internal::GetOutputOptions())
.release();
return default_display_reporter;
}
size_t RunSpecifiedBenchmarks() {
return RunSpecifiedBenchmarks(nullptr, nullptr, FLAGS_benchmark_filter);
}
size_t RunSpecifiedBenchmarks(std::string spec) {
return RunSpecifiedBenchmarks(nullptr, nullptr, std::move(spec));
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) {
return RunSpecifiedBenchmarks(display_reporter, nullptr,
FLAGS_benchmark_filter);
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
std::string spec) {
return RunSpecifiedBenchmarks(display_reporter, nullptr, std::move(spec));
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
BenchmarkReporter* file_reporter) {
return RunSpecifiedBenchmarks(display_reporter, file_reporter,
FLAGS_benchmark_filter);
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
BenchmarkReporter* file_reporter,
std::string spec) {
if (spec.empty() || spec == "all")
spec = "."; // Regexp that matches all benchmarks
// Setup the reporters
std::ofstream output_file;
std::unique_ptr<BenchmarkReporter> default_display_reporter;
std::unique_ptr<BenchmarkReporter> default_file_reporter;
if (!display_reporter) {
default_display_reporter.reset(CreateDefaultDisplayReporter());
display_reporter = default_display_reporter.get();
}
auto& Out = display_reporter->GetOutputStream();
auto& Err = display_reporter->GetErrorStream();
std::string const& fname = FLAGS_benchmark_out;
if (fname.empty() && file_reporter) {
Err << "A custom file reporter was provided but "
"--benchmark_out=<file> was not specified."
<< std::endl;
Out.flush();
Err.flush();
std::exit(1);
}
if (!fname.empty()) {
output_file.open(fname);
if (!output_file.is_open()) {
Err << "invalid file name: '" << fname << "'" << std::endl;
Out.flush();
Err.flush();
std::exit(1);
}
if (!file_reporter) {
default_file_reporter = internal::CreateReporter(
FLAGS_benchmark_out_format, FLAGS_benchmark_counters_tabular
? ConsoleReporter::OO_Tabular
: ConsoleReporter::OO_None);
file_reporter = default_file_reporter.get();
}
file_reporter->SetOutputStream(&output_file);
file_reporter->SetErrorStream(&output_file);
}
std::vector<internal::BenchmarkInstance> benchmarks;
if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) {
Out.flush();
Err.flush();
return 0;
}
if (benchmarks.empty()) {
Err << "Failed to match any benchmarks against regex: " << spec << "\n";
Out.flush();
Err.flush();
return 0;
}
if (FLAGS_benchmark_list_tests) {
for (auto const& benchmark : benchmarks)
Out << benchmark.name().str() << "\n";
} else {
internal::RunBenchmarks(benchmarks, display_reporter, file_reporter);
}
Out.flush();
Err.flush();
return benchmarks.size();
}
namespace {
// stores the time unit benchmarks use by default
TimeUnit default_time_unit = kNanosecond;
} // namespace
TimeUnit GetDefaultTimeUnit() { return default_time_unit; }
void SetDefaultTimeUnit(TimeUnit unit) { default_time_unit = unit; }
std::string GetBenchmarkFilter() { return FLAGS_benchmark_filter; }
void SetBenchmarkFilter(std::string value) {
FLAGS_benchmark_filter = std::move(value);
}
int32_t GetBenchmarkVerbosity() { return FLAGS_v; }
void RegisterMemoryManager(MemoryManager* manager) {
internal::memory_manager = manager;
}
void AddCustomContext(const std::string& key, const std::string& value) {
if (internal::global_context == nullptr) {
internal::global_context = new std::map<std::string, std::string>();
}
if (!internal::global_context->emplace(key, value).second) {
std::cerr << "Failed to add custom context \"" << key << "\" as it already "
<< "exists with value \"" << value << "\"\n";
}
}
namespace internal {
void (*HelperPrintf)();
void PrintUsageAndExit() {
HelperPrintf();
exit(0);
}
void SetDefaultTimeUnitFromFlag(const std::string& time_unit_flag) {
if (time_unit_flag == "s") {
return SetDefaultTimeUnit(kSecond);
}
if (time_unit_flag == "ms") {
return SetDefaultTimeUnit(kMillisecond);
}
if (time_unit_flag == "us") {
return SetDefaultTimeUnit(kMicrosecond);
}
if (time_unit_flag == "ns") {
return SetDefaultTimeUnit(kNanosecond);
}
if (!time_unit_flag.empty()) {
PrintUsageAndExit();
}
}
void ParseCommandLineFlags(int* argc, char** argv) {
using namespace benchmark;
BenchmarkReporter::Context::executable_name =
(argc && *argc > 0) ? argv[0] : "unknown";
for (int i = 1; argc && i < *argc; ++i) {
if (ParseBoolFlag(argv[i], "benchmark_list_tests",
&FLAGS_benchmark_list_tests) ||
ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
ParseStringFlag(argv[i], "benchmark_min_time",
&FLAGS_benchmark_min_time) ||
ParseDoubleFlag(argv[i], "benchmark_min_warmup_time",
&FLAGS_benchmark_min_warmup_time) ||
ParseInt32Flag(argv[i], "benchmark_repetitions",
&FLAGS_benchmark_repetitions) ||
ParseBoolFlag(argv[i], "benchmark_enable_random_interleaving",
&FLAGS_benchmark_enable_random_interleaving) ||
ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
&FLAGS_benchmark_report_aggregates_only) ||
ParseBoolFlag(argv[i], "benchmark_display_aggregates_only",
&FLAGS_benchmark_display_aggregates_only) ||
ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
ParseStringFlag(argv[i], "benchmark_out_format",
&FLAGS_benchmark_out_format) ||
ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
ParseBoolFlag(argv[i], "benchmark_counters_tabular",
&FLAGS_benchmark_counters_tabular) ||
ParseStringFlag(argv[i], "benchmark_perf_counters",
&FLAGS_benchmark_perf_counters) ||
ParseKeyValueFlag(argv[i], "benchmark_context",
&FLAGS_benchmark_context) ||
ParseStringFlag(argv[i], "benchmark_time_unit",
&FLAGS_benchmark_time_unit) ||
ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
--(*argc);
--i;
} else if (IsFlag(argv[i], "help")) {
PrintUsageAndExit();
}
}
for (auto const* flag :
{&FLAGS_benchmark_format, &FLAGS_benchmark_out_format}) {
if (*flag != "console" && *flag != "json" && *flag != "csv") {
PrintUsageAndExit();
}
}
SetDefaultTimeUnitFromFlag(FLAGS_benchmark_time_unit);
if (FLAGS_benchmark_color.empty()) {
PrintUsageAndExit();
}
for (const auto& kv : FLAGS_benchmark_context) {
AddCustomContext(kv.first, kv.second);
}
}
int InitializeStreams() {
static std::ios_base::Init init;
return 0;
}
} // end namespace internal
std::string GetBenchmarkVersion() {
#ifdef BENCHMARK_VERSION
return {BENCHMARK_VERSION};
#else
return {""};
#endif
}
void PrintDefaultHelp() {
fprintf(stdout,
"benchmark"
" [--benchmark_list_tests={true|false}]\n"
" [--benchmark_filter=<regex>]\n"
" [--benchmark_min_time=`<integer>x` OR `<float>s` ]\n"
" [--benchmark_min_warmup_time=<min_warmup_time>]\n"
" [--benchmark_repetitions=<num_repetitions>]\n"
" [--benchmark_enable_random_interleaving={true|false}]\n"
" [--benchmark_report_aggregates_only={true|false}]\n"
" [--benchmark_display_aggregates_only={true|false}]\n"
" [--benchmark_format=<console|json|csv>]\n"
" [--benchmark_out=<filename>]\n"
" [--benchmark_out_format=<json|console|csv>]\n"
" [--benchmark_color={auto|true|false}]\n"
" [--benchmark_counters_tabular={true|false}]\n"
#if defined HAVE_LIBPFM
" [--benchmark_perf_counters=<counter>,...]\n"
#endif
" [--benchmark_context=<key>=<value>,...]\n"
" [--benchmark_time_unit={ns|us|ms|s}]\n"
" [--v=<verbosity>]\n");
}
void Initialize(int* argc, char** argv, void (*HelperPrintf)()) {
internal::HelperPrintf = HelperPrintf;
internal::ParseCommandLineFlags(argc, argv);
internal::LogLevel() = FLAGS_v;
}
void Shutdown() { delete internal::global_context; }
bool ReportUnrecognizedArguments(int argc, char** argv) {
for (int i = 1; i < argc; ++i) {
fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0],
argv[i]);
}
return argc > 1;
}
} // end namespace benchmark

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#include "benchmark_api_internal.h"
#include <cinttypes>
#include "string_util.h"
namespace benchmark {
namespace internal {
BenchmarkInstance::BenchmarkInstance(Benchmark* benchmark, int family_idx,
int per_family_instance_idx,
const std::vector<int64_t>& args,
int thread_count)
: benchmark_(*benchmark),
family_index_(family_idx),
per_family_instance_index_(per_family_instance_idx),
aggregation_report_mode_(benchmark_.aggregation_report_mode_),
args_(args),
time_unit_(benchmark_.GetTimeUnit()),
measure_process_cpu_time_(benchmark_.measure_process_cpu_time_),
use_real_time_(benchmark_.use_real_time_),
use_manual_time_(benchmark_.use_manual_time_),
complexity_(benchmark_.complexity_),
complexity_lambda_(benchmark_.complexity_lambda_),
statistics_(benchmark_.statistics_),
repetitions_(benchmark_.repetitions_),
min_time_(benchmark_.min_time_),
min_warmup_time_(benchmark_.min_warmup_time_),
iterations_(benchmark_.iterations_),
threads_(thread_count) {
name_.function_name = benchmark_.name_;
size_t arg_i = 0;
for (const auto& arg : args) {
if (!name_.args.empty()) {
name_.args += '/';
}
if (arg_i < benchmark->arg_names_.size()) {
const auto& arg_name = benchmark_.arg_names_[arg_i];
if (!arg_name.empty()) {
name_.args += StrFormat("%s:", arg_name.c_str());
}
}
name_.args += StrFormat("%" PRId64, arg);
++arg_i;
}
if (!IsZero(benchmark->min_time_)) {
name_.min_time = StrFormat("min_time:%0.3f", benchmark_.min_time_);
}
if (!IsZero(benchmark->min_warmup_time_)) {
name_.min_warmup_time =
StrFormat("min_warmup_time:%0.3f", benchmark_.min_warmup_time_);
}
if (benchmark_.iterations_ != 0) {
name_.iterations = StrFormat(
"iterations:%lu", static_cast<unsigned long>(benchmark_.iterations_));
}
if (benchmark_.repetitions_ != 0) {
name_.repetitions = StrFormat("repeats:%d", benchmark_.repetitions_);
}
if (benchmark_.measure_process_cpu_time_) {
name_.time_type = "process_time";
}
if (benchmark_.use_manual_time_) {
if (!name_.time_type.empty()) {
name_.time_type += '/';
}
name_.time_type += "manual_time";
} else if (benchmark_.use_real_time_) {
if (!name_.time_type.empty()) {
name_.time_type += '/';
}
name_.time_type += "real_time";
}
if (!benchmark_.thread_counts_.empty()) {
name_.threads = StrFormat("threads:%d", threads_);
}
setup_ = benchmark_.setup_;
teardown_ = benchmark_.teardown_;
}
State BenchmarkInstance::Run(
IterationCount iters, int thread_id, internal::ThreadTimer* timer,
internal::ThreadManager* manager,
internal::PerfCountersMeasurement* perf_counters_measurement) const {
State st(name_.function_name, iters, args_, thread_id, threads_, timer,
manager, perf_counters_measurement);
benchmark_.Run(st);
return st;
}
void BenchmarkInstance::Setup() const {
if (setup_) {
State st(name_.function_name, /*iters*/ 1, args_, /*thread_id*/ 0, threads_,
nullptr, nullptr, nullptr);
setup_(st);
}
}
void BenchmarkInstance::Teardown() const {
if (teardown_) {
State st(name_.function_name, /*iters*/ 1, args_, /*thread_id*/ 0, threads_,
nullptr, nullptr, nullptr);
teardown_(st);
}
}
} // namespace internal
} // namespace benchmark

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#ifndef BENCHMARK_API_INTERNAL_H
#define BENCHMARK_API_INTERNAL_H
#include <cmath>
#include <iosfwd>
#include <limits>
#include <memory>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
#include "commandlineflags.h"
namespace benchmark {
namespace internal {
// Information kept per benchmark we may want to run
class BenchmarkInstance {
public:
BenchmarkInstance(Benchmark* benchmark, int family_index,
int per_family_instance_index,
const std::vector<int64_t>& args, int threads);
const BenchmarkName& name() const { return name_; }
int family_index() const { return family_index_; }
int per_family_instance_index() const { return per_family_instance_index_; }
AggregationReportMode aggregation_report_mode() const {
return aggregation_report_mode_;
}
TimeUnit time_unit() const { return time_unit_; }
bool measure_process_cpu_time() const { return measure_process_cpu_time_; }
bool use_real_time() const { return use_real_time_; }
bool use_manual_time() const { return use_manual_time_; }
BigO complexity() const { return complexity_; }
BigOFunc* complexity_lambda() const { return complexity_lambda_; }
const std::vector<Statistics>& statistics() const { return statistics_; }
int repetitions() const { return repetitions_; }
double min_time() const { return min_time_; }
double min_warmup_time() const { return min_warmup_time_; }
IterationCount iterations() const { return iterations_; }
int threads() const { return threads_; }
void Setup() const;
void Teardown() const;
State Run(IterationCount iters, int thread_id, internal::ThreadTimer* timer,
internal::ThreadManager* manager,
internal::PerfCountersMeasurement* perf_counters_measurement) const;
private:
BenchmarkName name_;
Benchmark& benchmark_;
const int family_index_;
const int per_family_instance_index_;
AggregationReportMode aggregation_report_mode_;
const std::vector<int64_t>& args_;
TimeUnit time_unit_;
bool measure_process_cpu_time_;
bool use_real_time_;
bool use_manual_time_;
BigO complexity_;
BigOFunc* complexity_lambda_;
UserCounters counters_;
const std::vector<Statistics>& statistics_;
int repetitions_;
double min_time_;
double min_warmup_time_;
IterationCount iterations_;
int threads_; // Number of concurrent threads to us
typedef void (*callback_function)(const benchmark::State&);
callback_function setup_ = nullptr;
callback_function teardown_ = nullptr;
};
bool FindBenchmarksInternal(const std::string& re,
std::vector<BenchmarkInstance>* benchmarks,
std::ostream* Err);
bool IsZero(double n);
BENCHMARK_EXPORT
ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
} // end namespace internal
} // end namespace benchmark
#endif // BENCHMARK_API_INTERNAL_H

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// Copyright 2018 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
BENCHMARK_EXPORT int main(int, char**);
BENCHMARK_MAIN();

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <benchmark/benchmark.h>
namespace benchmark {
namespace {
// Compute the total size of a pack of std::strings
size_t size_impl() { return 0; }
template <typename Head, typename... Tail>
size_t size_impl(const Head& head, const Tail&... tail) {
return head.size() + size_impl(tail...);
}
// Join a pack of std::strings using a delimiter
// TODO: use absl::StrJoin
void join_impl(std::string&, char) {}
template <typename Head, typename... Tail>
void join_impl(std::string& s, const char delimiter, const Head& head,
const Tail&... tail) {
if (!s.empty() && !head.empty()) {
s += delimiter;
}
s += head;
join_impl(s, delimiter, tail...);
}
template <typename... Ts>
std::string join(char delimiter, const Ts&... ts) {
std::string s;
s.reserve(sizeof...(Ts) + size_impl(ts...));
join_impl(s, delimiter, ts...);
return s;
}
} // namespace
BENCHMARK_EXPORT
std::string BenchmarkName::str() const {
return join('/', function_name, args, min_time, min_warmup_time, iterations,
repetitions, time_type, threads);
}
} // namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark_register.h"
#ifndef BENCHMARK_OS_WINDOWS
#if !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <atomic>
#include <cinttypes>
#include <condition_variable>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <memory>
#include <numeric>
#include <sstream>
#include <thread>
#include "benchmark/benchmark.h"
#include "benchmark_api_internal.h"
#include "check.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "internal_macros.h"
#include "log.h"
#include "mutex.h"
#include "re.h"
#include "statistics.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
namespace {
// For non-dense Range, intermediate values are powers of kRangeMultiplier.
static constexpr int kRangeMultiplier = 8;
// The size of a benchmark family determines is the number of inputs to repeat
// the benchmark on. If this is "large" then warn the user during configuration.
static constexpr size_t kMaxFamilySize = 100;
static constexpr char kDisabledPrefix[] = "DISABLED_";
} // end namespace
namespace internal {
//=============================================================================//
// BenchmarkFamilies
//=============================================================================//
// Class for managing registered benchmarks. Note that each registered
// benchmark identifies a family of related benchmarks to run.
class BenchmarkFamilies {
public:
static BenchmarkFamilies* GetInstance();
// Registers a benchmark family and returns the index assigned to it.
size_t AddBenchmark(std::unique_ptr<Benchmark> family);
// Clear all registered benchmark families.
void ClearBenchmarks();
// Extract the list of benchmark instances that match the specified
// regular expression.
bool FindBenchmarks(std::string re,
std::vector<BenchmarkInstance>* benchmarks,
std::ostream* Err);
private:
BenchmarkFamilies() {}
std::vector<std::unique_ptr<Benchmark>> families_;
Mutex mutex_;
};
BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
static BenchmarkFamilies instance;
return &instance;
}
size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
MutexLock l(mutex_);
size_t index = families_.size();
families_.push_back(std::move(family));
return index;
}
void BenchmarkFamilies::ClearBenchmarks() {
MutexLock l(mutex_);
families_.clear();
families_.shrink_to_fit();
}
bool BenchmarkFamilies::FindBenchmarks(
std::string spec, std::vector<BenchmarkInstance>* benchmarks,
std::ostream* ErrStream) {
BM_CHECK(ErrStream);
auto& Err = *ErrStream;
// Make regular expression out of command-line flag
std::string error_msg;
Regex re;
bool is_negative_filter = false;
if (spec[0] == '-') {
spec.replace(0, 1, "");
is_negative_filter = true;
}
if (!re.Init(spec, &error_msg)) {
Err << "Could not compile benchmark re: " << error_msg << std::endl;
return false;
}
// Special list of thread counts to use when none are specified
const std::vector<int> one_thread = {1};
int next_family_index = 0;
MutexLock l(mutex_);
for (std::unique_ptr<Benchmark>& family : families_) {
int family_index = next_family_index;
int per_family_instance_index = 0;
// Family was deleted or benchmark doesn't match
if (!family) continue;
if (family->ArgsCnt() == -1) {
family->Args({});
}
const std::vector<int>* thread_counts =
(family->thread_counts_.empty()
? &one_thread
: &static_cast<const std::vector<int>&>(family->thread_counts_));
const size_t family_size = family->args_.size() * thread_counts->size();
// The benchmark will be run at least 'family_size' different inputs.
// If 'family_size' is very large warn the user.
if (family_size > kMaxFamilySize) {
Err << "The number of inputs is very large. " << family->name_
<< " will be repeated at least " << family_size << " times.\n";
}
// reserve in the special case the regex ".", since we know the final
// family size. this doesn't take into account any disabled benchmarks
// so worst case we reserve more than we need.
if (spec == ".") benchmarks->reserve(benchmarks->size() + family_size);
for (auto const& args : family->args_) {
for (int num_threads : *thread_counts) {
BenchmarkInstance instance(family.get(), family_index,
per_family_instance_index, args,
num_threads);
const auto full_name = instance.name().str();
if (full_name.rfind(kDisabledPrefix, 0) != 0 &&
((re.Match(full_name) && !is_negative_filter) ||
(!re.Match(full_name) && is_negative_filter))) {
benchmarks->push_back(std::move(instance));
++per_family_instance_index;
// Only bump the next family index once we've estabilished that
// at least one instance of this family will be run.
if (next_family_index == family_index) ++next_family_index;
}
}
}
}
return true;
}
Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
std::unique_ptr<Benchmark> bench_ptr(bench);
BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
families->AddBenchmark(std::move(bench_ptr));
return bench;
}
// FIXME: This function is a hack so that benchmark.cc can access
// `BenchmarkFamilies`
bool FindBenchmarksInternal(const std::string& re,
std::vector<BenchmarkInstance>* benchmarks,
std::ostream* Err) {
return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
}
//=============================================================================//
// Benchmark
//=============================================================================//
Benchmark::Benchmark(const std::string& name)
: name_(name),
aggregation_report_mode_(ARM_Unspecified),
time_unit_(GetDefaultTimeUnit()),
use_default_time_unit_(true),
range_multiplier_(kRangeMultiplier),
min_time_(0),
min_warmup_time_(0),
iterations_(0),
repetitions_(0),
measure_process_cpu_time_(false),
use_real_time_(false),
use_manual_time_(false),
complexity_(oNone),
complexity_lambda_(nullptr),
setup_(nullptr),
teardown_(nullptr) {
ComputeStatistics("mean", StatisticsMean);
ComputeStatistics("median", StatisticsMedian);
ComputeStatistics("stddev", StatisticsStdDev);
ComputeStatistics("cv", StatisticsCV, kPercentage);
}
Benchmark::~Benchmark() {}
Benchmark* Benchmark::Name(const std::string& name) {
SetName(name);
return this;
}
Benchmark* Benchmark::Arg(int64_t x) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
args_.push_back({x});
return this;
}
Benchmark* Benchmark::Unit(TimeUnit unit) {
time_unit_ = unit;
use_default_time_unit_ = false;
return this;
}
Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
std::vector<int64_t> arglist;
AddRange(&arglist, start, limit, range_multiplier_);
for (int64_t i : arglist) {
args_.push_back({i});
}
return this;
}
Benchmark* Benchmark::Ranges(
const std::vector<std::pair<int64_t, int64_t>>& ranges) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
std::vector<std::vector<int64_t>> arglists(ranges.size());
for (std::size_t i = 0; i < ranges.size(); i++) {
AddRange(&arglists[i], ranges[i].first, ranges[i].second,
range_multiplier_);
}
ArgsProduct(arglists);
return this;
}
Benchmark* Benchmark::ArgsProduct(
const std::vector<std::vector<int64_t>>& arglists) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(arglists.size()));
std::vector<std::size_t> indices(arglists.size());
const std::size_t total = std::accumulate(
std::begin(arglists), std::end(arglists), std::size_t{1},
[](const std::size_t res, const std::vector<int64_t>& arglist) {
return res * arglist.size();
});
std::vector<int64_t> args;
args.reserve(arglists.size());
for (std::size_t i = 0; i < total; i++) {
for (std::size_t arg = 0; arg < arglists.size(); arg++) {
args.push_back(arglists[arg][indices[arg]]);
}
args_.push_back(args);
args.clear();
std::size_t arg = 0;
do {
indices[arg] = (indices[arg] + 1) % arglists[arg].size();
} while (indices[arg++] == 0 && arg < arglists.size());
}
return this;
}
Benchmark* Benchmark::ArgName(const std::string& name) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
arg_names_ = {name};
return this;
}
Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
arg_names_ = names;
return this;
}
Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
BM_CHECK_LE(start, limit);
for (int64_t arg = start; arg <= limit; arg += step) {
args_.push_back({arg});
}
return this;
}
Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
BM_CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
args_.push_back(args);
return this;
}
Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
custom_arguments(this);
return this;
}
Benchmark* Benchmark::Setup(void (*setup)(const benchmark::State&)) {
BM_CHECK(setup != nullptr);
setup_ = setup;
return this;
}
Benchmark* Benchmark::Teardown(void (*teardown)(const benchmark::State&)) {
BM_CHECK(teardown != nullptr);
teardown_ = teardown;
return this;
}
Benchmark* Benchmark::RangeMultiplier(int multiplier) {
BM_CHECK(multiplier > 1);
range_multiplier_ = multiplier;
return this;
}
Benchmark* Benchmark::MinTime(double t) {
BM_CHECK(t > 0.0);
BM_CHECK(iterations_ == 0);
min_time_ = t;
return this;
}
Benchmark* Benchmark::MinWarmUpTime(double t) {
BM_CHECK(t >= 0.0);
BM_CHECK(iterations_ == 0);
min_warmup_time_ = t;
return this;
}
Benchmark* Benchmark::Iterations(IterationCount n) {
BM_CHECK(n > 0);
BM_CHECK(IsZero(min_time_));
BM_CHECK(IsZero(min_warmup_time_));
iterations_ = n;
return this;
}
Benchmark* Benchmark::Repetitions(int n) {
BM_CHECK(n > 0);
repetitions_ = n;
return this;
}
Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
aggregation_report_mode_ = value ? ARM_ReportAggregatesOnly : ARM_Default;
return this;
}
Benchmark* Benchmark::DisplayAggregatesOnly(bool value) {
// If we were called, the report mode is no longer 'unspecified', in any case.
aggregation_report_mode_ = static_cast<AggregationReportMode>(
aggregation_report_mode_ | ARM_Default);
if (value) {
aggregation_report_mode_ = static_cast<AggregationReportMode>(
aggregation_report_mode_ | ARM_DisplayReportAggregatesOnly);
} else {
aggregation_report_mode_ = static_cast<AggregationReportMode>(
aggregation_report_mode_ & ~ARM_DisplayReportAggregatesOnly);
}
return this;
}
Benchmark* Benchmark::MeasureProcessCPUTime() {
// Can be used together with UseRealTime() / UseManualTime().
measure_process_cpu_time_ = true;
return this;
}
Benchmark* Benchmark::UseRealTime() {
BM_CHECK(!use_manual_time_)
<< "Cannot set UseRealTime and UseManualTime simultaneously.";
use_real_time_ = true;
return this;
}
Benchmark* Benchmark::UseManualTime() {
BM_CHECK(!use_real_time_)
<< "Cannot set UseRealTime and UseManualTime simultaneously.";
use_manual_time_ = true;
return this;
}
Benchmark* Benchmark::Complexity(BigO complexity) {
complexity_ = complexity;
return this;
}
Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
complexity_lambda_ = complexity;
complexity_ = oLambda;
return this;
}
Benchmark* Benchmark::ComputeStatistics(const std::string& name,
StatisticsFunc* statistics,
StatisticUnit unit) {
statistics_.emplace_back(name, statistics, unit);
return this;
}
Benchmark* Benchmark::Threads(int t) {
BM_CHECK_GT(t, 0);
thread_counts_.push_back(t);
return this;
}
Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
BM_CHECK_GT(min_threads, 0);
BM_CHECK_GE(max_threads, min_threads);
AddRange(&thread_counts_, min_threads, max_threads, 2);
return this;
}
Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
int stride) {
BM_CHECK_GT(min_threads, 0);
BM_CHECK_GE(max_threads, min_threads);
BM_CHECK_GE(stride, 1);
for (auto i = min_threads; i < max_threads; i += stride) {
thread_counts_.push_back(i);
}
thread_counts_.push_back(max_threads);
return this;
}
Benchmark* Benchmark::ThreadPerCpu() {
thread_counts_.push_back(CPUInfo::Get().num_cpus);
return this;
}
void Benchmark::SetName(const std::string& name) { name_ = name; }
const char* Benchmark::GetName() const { return name_.c_str(); }
int Benchmark::ArgsCnt() const {
if (args_.empty()) {
if (arg_names_.empty()) return -1;
return static_cast<int>(arg_names_.size());
}
return static_cast<int>(args_.front().size());
}
const char* Benchmark::GetArgName(int arg) const {
BM_CHECK_GE(arg, 0);
size_t uarg = static_cast<size_t>(arg);
BM_CHECK_LT(uarg, arg_names_.size());
return arg_names_[uarg].c_str();
}
TimeUnit Benchmark::GetTimeUnit() const {
return use_default_time_unit_ ? GetDefaultTimeUnit() : time_unit_;
}
//=============================================================================//
// FunctionBenchmark
//=============================================================================//
void FunctionBenchmark::Run(State& st) { func_(st); }
} // end namespace internal
void ClearRegisteredBenchmarks() {
internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
}
std::vector<int64_t> CreateRange(int64_t lo, int64_t hi, int multi) {
std::vector<int64_t> args;
internal::AddRange(&args, lo, hi, multi);
return args;
}
std::vector<int64_t> CreateDenseRange(int64_t start, int64_t limit, int step) {
BM_CHECK_LE(start, limit);
std::vector<int64_t> args;
for (int64_t arg = start; arg <= limit; arg += step) {
args.push_back(arg);
}
return args;
}
} // end namespace benchmark

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#ifndef BENCHMARK_REGISTER_H
#define BENCHMARK_REGISTER_H
#include <algorithm>
#include <limits>
#include <vector>
#include "check.h"
namespace benchmark {
namespace internal {
// Append the powers of 'mult' in the closed interval [lo, hi].
// Returns iterator to the start of the inserted range.
template <typename T>
typename std::vector<T>::iterator AddPowers(std::vector<T>* dst, T lo, T hi,
int mult) {
BM_CHECK_GE(lo, 0);
BM_CHECK_GE(hi, lo);
BM_CHECK_GE(mult, 2);
const size_t start_offset = dst->size();
static const T kmax = std::numeric_limits<T>::max();
// Space out the values in multiples of "mult"
for (T i = static_cast<T>(1); i <= hi; i = static_cast<T>(i * mult)) {
if (i >= lo) {
dst->push_back(i);
}
// Break the loop here since multiplying by
// 'mult' would move outside of the range of T
if (i > kmax / mult) break;
}
return dst->begin() + static_cast<int>(start_offset);
}
template <typename T>
void AddNegatedPowers(std::vector<T>* dst, T lo, T hi, int mult) {
// We negate lo and hi so we require that they cannot be equal to 'min'.
BM_CHECK_GT(lo, std::numeric_limits<T>::min());
BM_CHECK_GT(hi, std::numeric_limits<T>::min());
BM_CHECK_GE(hi, lo);
BM_CHECK_LE(hi, 0);
// Add positive powers, then negate and reverse.
// Casts necessary since small integers get promoted
// to 'int' when negating.
const auto lo_complement = static_cast<T>(-lo);
const auto hi_complement = static_cast<T>(-hi);
const auto it = AddPowers(dst, hi_complement, lo_complement, mult);
std::for_each(it, dst->end(), [](T& t) { t = static_cast<T>(t * -1); });
std::reverse(it, dst->end());
}
template <typename T>
void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
static_assert(std::is_integral<T>::value && std::is_signed<T>::value,
"Args type must be a signed integer");
BM_CHECK_GE(hi, lo);
BM_CHECK_GE(mult, 2);
// Add "lo"
dst->push_back(lo);
// Handle lo == hi as a special case, so we then know
// lo < hi and so it is safe to add 1 to lo and subtract 1
// from hi without falling outside of the range of T.
if (lo == hi) return;
// Ensure that lo_inner <= hi_inner below.
if (lo + 1 == hi) {
dst->push_back(hi);
return;
}
// Add all powers of 'mult' in the range [lo+1, hi-1] (inclusive).
const auto lo_inner = static_cast<T>(lo + 1);
const auto hi_inner = static_cast<T>(hi - 1);
// Insert negative values
if (lo_inner < 0) {
AddNegatedPowers(dst, lo_inner, std::min(hi_inner, T{-1}), mult);
}
// Treat 0 as a special case (see discussion on #762).
if (lo < 0 && hi >= 0) {
dst->push_back(0);
}
// Insert positive values
if (hi_inner > 0) {
AddPowers(dst, std::max(lo_inner, T{1}), hi_inner, mult);
}
// Add "hi" (if different from last value).
if (hi != dst->back()) {
dst->push_back(hi);
}
}
} // namespace internal
} // namespace benchmark
#endif // BENCHMARK_REGISTER_H

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark_runner.h"
#include "benchmark/benchmark.h"
#include "benchmark_api_internal.h"
#include "internal_macros.h"
#ifndef BENCHMARK_OS_WINDOWS
#if !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <atomic>
#include <climits>
#include <cmath>
#include <condition_variable>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <limits>
#include <memory>
#include <string>
#include <thread>
#include <utility>
#include "check.h"
#include "colorprint.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "counter.h"
#include "internal_macros.h"
#include "log.h"
#include "mutex.h"
#include "perf_counters.h"
#include "re.h"
#include "statistics.h"
#include "string_util.h"
#include "thread_manager.h"
#include "thread_timer.h"
namespace benchmark {
namespace internal {
MemoryManager* memory_manager = nullptr;
namespace {
static constexpr IterationCount kMaxIterations = 1000000000000;
const double kDefaultMinTime =
std::strtod(::benchmark::kDefaultMinTimeStr, /*p_end*/ nullptr);
BenchmarkReporter::Run CreateRunReport(
const benchmark::internal::BenchmarkInstance& b,
const internal::ThreadManager::Result& results,
IterationCount memory_iterations,
const MemoryManager::Result* memory_result, double seconds,
int64_t repetition_index, int64_t repeats) {
// Create report about this benchmark run.
BenchmarkReporter::Run report;
report.run_name = b.name();
report.family_index = b.family_index();
report.per_family_instance_index = b.per_family_instance_index();
report.skipped = results.skipped_;
report.skip_message = results.skip_message_;
report.report_label = results.report_label_;
// This is the total iterations across all threads.
report.iterations = results.iterations;
report.time_unit = b.time_unit();
report.threads = b.threads();
report.repetition_index = repetition_index;
report.repetitions = repeats;
if (!report.skipped) {
if (b.use_manual_time()) {
report.real_accumulated_time = results.manual_time_used;
} else {
report.real_accumulated_time = results.real_time_used;
}
report.use_real_time_for_initial_big_o = b.use_manual_time();
report.cpu_accumulated_time = results.cpu_time_used;
report.complexity_n = results.complexity_n;
report.complexity = b.complexity();
report.complexity_lambda = b.complexity_lambda();
report.statistics = &b.statistics();
report.counters = results.counters;
if (memory_iterations > 0) {
assert(memory_result != nullptr);
report.memory_result = memory_result;
report.allocs_per_iter =
memory_iterations ? static_cast<double>(memory_result->num_allocs) /
static_cast<double>(memory_iterations)
: 0;
}
internal::Finish(&report.counters, results.iterations, seconds,
b.threads());
}
return report;
}
// Execute one thread of benchmark b for the specified number of iterations.
// Adds the stats collected for the thread into manager->results.
void RunInThread(const BenchmarkInstance* b, IterationCount iters,
int thread_id, ThreadManager* manager,
PerfCountersMeasurement* perf_counters_measurement) {
internal::ThreadTimer timer(
b->measure_process_cpu_time()
? internal::ThreadTimer::CreateProcessCpuTime()
: internal::ThreadTimer::Create());
State st =
b->Run(iters, thread_id, &timer, manager, perf_counters_measurement);
BM_CHECK(st.skipped() || st.iterations() >= st.max_iterations)
<< "Benchmark returned before State::KeepRunning() returned false!";
{
MutexLock l(manager->GetBenchmarkMutex());
internal::ThreadManager::Result& results = manager->results;
results.iterations += st.iterations();
results.cpu_time_used += timer.cpu_time_used();
results.real_time_used += timer.real_time_used();
results.manual_time_used += timer.manual_time_used();
results.complexity_n += st.complexity_length_n();
internal::Increment(&results.counters, st.counters);
}
manager->NotifyThreadComplete();
}
double ComputeMinTime(const benchmark::internal::BenchmarkInstance& b,
const BenchTimeType& iters_or_time) {
if (!IsZero(b.min_time())) return b.min_time();
// If the flag was used to specify number of iters, then return the default
// min_time.
if (iters_or_time.tag == BenchTimeType::ITERS) return kDefaultMinTime;
return iters_or_time.time;
}
IterationCount ComputeIters(const benchmark::internal::BenchmarkInstance& b,
const BenchTimeType& iters_or_time) {
if (b.iterations() != 0) return b.iterations();
// We've already concluded that this flag is currently used to pass
// iters but do a check here again anyway.
BM_CHECK(iters_or_time.tag == BenchTimeType::ITERS);
return iters_or_time.iters;
}
} // end namespace
BenchTimeType ParseBenchMinTime(const std::string& value) {
BenchTimeType ret;
if (value.empty()) {
ret.tag = BenchTimeType::TIME;
ret.time = 0.0;
return ret;
}
if (value.back() == 'x') {
char* p_end;
// Reset errno before it's changed by strtol.
errno = 0;
IterationCount num_iters = std::strtol(value.c_str(), &p_end, 10);
// After a valid parse, p_end should have been set to
// point to the 'x' suffix.
BM_CHECK(errno == 0 && p_end != nullptr && *p_end == 'x')
<< "Malformed iters value passed to --benchmark_min_time: `" << value
<< "`. Expected --benchmark_min_time=<integer>x.";
ret.tag = BenchTimeType::ITERS;
ret.iters = num_iters;
return ret;
}
bool has_suffix = value.back() == 's';
if (!has_suffix) {
BM_VLOG(0) << "Value passed to --benchmark_min_time should have a suffix. "
"Eg., `30s` for 30-seconds.";
}
char* p_end;
// Reset errno before it's changed by strtod.
errno = 0;
double min_time = std::strtod(value.c_str(), &p_end);
// After a successful parse, p_end should point to the suffix 's',
// or the end of the string if the suffix was omitted.
BM_CHECK(errno == 0 && p_end != nullptr &&
((has_suffix && *p_end == 's') || *p_end == '\0'))
<< "Malformed seconds value passed to --benchmark_min_time: `" << value
<< "`. Expected --benchmark_min_time=<float>x.";
ret.tag = BenchTimeType::TIME;
ret.time = min_time;
return ret;
}
BenchmarkRunner::BenchmarkRunner(
const benchmark::internal::BenchmarkInstance& b_,
PerfCountersMeasurement* pcm_,
BenchmarkReporter::PerFamilyRunReports* reports_for_family_)
: b(b_),
reports_for_family(reports_for_family_),
parsed_benchtime_flag(ParseBenchMinTime(FLAGS_benchmark_min_time)),
min_time(ComputeMinTime(b_, parsed_benchtime_flag)),
min_warmup_time((!IsZero(b.min_time()) && b.min_warmup_time() > 0.0)
? b.min_warmup_time()
: FLAGS_benchmark_min_warmup_time),
warmup_done(!(min_warmup_time > 0.0)),
repeats(b.repetitions() != 0 ? b.repetitions()
: FLAGS_benchmark_repetitions),
has_explicit_iteration_count(b.iterations() != 0 ||
parsed_benchtime_flag.tag ==
BenchTimeType::ITERS),
pool(static_cast<size_t>(b.threads() - 1)),
iters(has_explicit_iteration_count
? ComputeIters(b_, parsed_benchtime_flag)
: 1),
perf_counters_measurement_ptr(pcm_) {
run_results.display_report_aggregates_only =
(FLAGS_benchmark_report_aggregates_only ||
FLAGS_benchmark_display_aggregates_only);
run_results.file_report_aggregates_only =
FLAGS_benchmark_report_aggregates_only;
if (b.aggregation_report_mode() != internal::ARM_Unspecified) {
run_results.display_report_aggregates_only =
(b.aggregation_report_mode() &
internal::ARM_DisplayReportAggregatesOnly);
run_results.file_report_aggregates_only =
(b.aggregation_report_mode() & internal::ARM_FileReportAggregatesOnly);
BM_CHECK(FLAGS_benchmark_perf_counters.empty() ||
(perf_counters_measurement_ptr->num_counters() == 0))
<< "Perf counters were requested but could not be set up.";
}
}
BenchmarkRunner::IterationResults BenchmarkRunner::DoNIterations() {
BM_VLOG(2) << "Running " << b.name().str() << " for " << iters << "\n";
std::unique_ptr<internal::ThreadManager> manager;
manager.reset(new internal::ThreadManager(b.threads()));
// Run all but one thread in separate threads
for (std::size_t ti = 0; ti < pool.size(); ++ti) {
pool[ti] = std::thread(&RunInThread, &b, iters, static_cast<int>(ti + 1),
manager.get(), perf_counters_measurement_ptr);
}
// And run one thread here directly.
// (If we were asked to run just one thread, we don't create new threads.)
// Yes, we need to do this here *after* we start the separate threads.
RunInThread(&b, iters, 0, manager.get(), perf_counters_measurement_ptr);
// The main thread has finished. Now let's wait for the other threads.
manager->WaitForAllThreads();
for (std::thread& thread : pool) thread.join();
IterationResults i;
// Acquire the measurements/counters from the manager, UNDER THE LOCK!
{
MutexLock l(manager->GetBenchmarkMutex());
i.results = manager->results;
}
// And get rid of the manager.
manager.reset();
// Adjust real/manual time stats since they were reported per thread.
i.results.real_time_used /= b.threads();
i.results.manual_time_used /= b.threads();
// If we were measuring whole-process CPU usage, adjust the CPU time too.
if (b.measure_process_cpu_time()) i.results.cpu_time_used /= b.threads();
BM_VLOG(2) << "Ran in " << i.results.cpu_time_used << "/"
<< i.results.real_time_used << "\n";
// By using KeepRunningBatch a benchmark can iterate more times than
// requested, so take the iteration count from i.results.
i.iters = i.results.iterations / b.threads();
// Base decisions off of real time if requested by this benchmark.
i.seconds = i.results.cpu_time_used;
if (b.use_manual_time()) {
i.seconds = i.results.manual_time_used;
} else if (b.use_real_time()) {
i.seconds = i.results.real_time_used;
}
return i;
}
IterationCount BenchmarkRunner::PredictNumItersNeeded(
const IterationResults& i) const {
// See how much iterations should be increased by.
// Note: Avoid division by zero with max(seconds, 1ns).
double multiplier = GetMinTimeToApply() * 1.4 / std::max(i.seconds, 1e-9);
// If our last run was at least 10% of FLAGS_benchmark_min_time then we
// use the multiplier directly.
// Otherwise we use at most 10 times expansion.
// NOTE: When the last run was at least 10% of the min time the max
// expansion should be 14x.
const bool is_significant = (i.seconds / GetMinTimeToApply()) > 0.1;
multiplier = is_significant ? multiplier : 10.0;
// So what seems to be the sufficiently-large iteration count? Round up.
const IterationCount max_next_iters = static_cast<IterationCount>(
std::llround(std::max(multiplier * static_cast<double>(i.iters),
static_cast<double>(i.iters) + 1.0)));
// But we do have *some* limits though..
const IterationCount next_iters = std::min(max_next_iters, kMaxIterations);
BM_VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
return next_iters; // round up before conversion to integer.
}
bool BenchmarkRunner::ShouldReportIterationResults(
const IterationResults& i) const {
// Determine if this run should be reported;
// Either it has run for a sufficient amount of time
// or because an error was reported.
return i.results.skipped_ ||
i.iters >= kMaxIterations || // Too many iterations already.
i.seconds >=
GetMinTimeToApply() || // The elapsed time is large enough.
// CPU time is specified but the elapsed real time greatly exceeds
// the minimum time.
// Note that user provided timers are except from this test.
((i.results.real_time_used >= 5 * GetMinTimeToApply()) &&
!b.use_manual_time());
}
double BenchmarkRunner::GetMinTimeToApply() const {
// In order to re-use functionality to run and measure benchmarks for running
// a warmup phase of the benchmark, we need a way of telling whether to apply
// min_time or min_warmup_time. This function will figure out if we are in the
// warmup phase and therefore need to apply min_warmup_time or if we already
// in the benchmarking phase and min_time needs to be applied.
return warmup_done ? min_time : min_warmup_time;
}
void BenchmarkRunner::FinishWarmUp(const IterationCount& i) {
warmup_done = true;
iters = i;
}
void BenchmarkRunner::RunWarmUp() {
// Use the same mechanisms for warming up the benchmark as used for actually
// running and measuring the benchmark.
IterationResults i_warmup;
// Dont use the iterations determined in the warmup phase for the actual
// measured benchmark phase. While this may be a good starting point for the
// benchmark and it would therefore get rid of the need to figure out how many
// iterations are needed if min_time is set again, this may also be a complete
// wrong guess since the warmup loops might be considerably slower (e.g
// because of caching effects).
const IterationCount i_backup = iters;
for (;;) {
b.Setup();
i_warmup = DoNIterations();
b.Teardown();
const bool finish = ShouldReportIterationResults(i_warmup);
if (finish) {
FinishWarmUp(i_backup);
break;
}
// Although we are running "only" a warmup phase where running enough
// iterations at once without measuring time isn't as important as it is for
// the benchmarking phase, we still do it the same way as otherwise it is
// very confusing for the user to know how to choose a proper value for
// min_warmup_time if a different approach on running it is used.
iters = PredictNumItersNeeded(i_warmup);
assert(iters > i_warmup.iters &&
"if we did more iterations than we want to do the next time, "
"then we should have accepted the current iteration run.");
}
}
void BenchmarkRunner::DoOneRepetition() {
assert(HasRepeatsRemaining() && "Already done all repetitions?");
const bool is_the_first_repetition = num_repetitions_done == 0;
// In case a warmup phase is requested by the benchmark, run it now.
// After running the warmup phase the BenchmarkRunner should be in a state as
// this warmup never happened except the fact that warmup_done is set. Every
// other manipulation of the BenchmarkRunner instance would be a bug! Please
// fix it.
if (!warmup_done) RunWarmUp();
IterationResults i;
// We *may* be gradually increasing the length (iteration count)
// of the benchmark until we decide the results are significant.
// And once we do, we report those last results and exit.
// Please do note that the if there are repetitions, the iteration count
// is *only* calculated for the *first* repetition, and other repetitions
// simply use that precomputed iteration count.
for (;;) {
b.Setup();
i = DoNIterations();
b.Teardown();
// Do we consider the results to be significant?
// If we are doing repetitions, and the first repetition was already done,
// it has calculated the correct iteration time, so we have run that very
// iteration count just now. No need to calculate anything. Just report.
// Else, the normal rules apply.
const bool results_are_significant = !is_the_first_repetition ||
has_explicit_iteration_count ||
ShouldReportIterationResults(i);
if (results_are_significant) break; // Good, let's report them!
// Nope, bad iteration. Let's re-estimate the hopefully-sufficient
// iteration count, and run the benchmark again...
iters = PredictNumItersNeeded(i);
assert(iters > i.iters &&
"if we did more iterations than we want to do the next time, "
"then we should have accepted the current iteration run.");
}
// Oh, one last thing, we need to also produce the 'memory measurements'..
MemoryManager::Result* memory_result = nullptr;
IterationCount memory_iterations = 0;
if (memory_manager != nullptr) {
// TODO(vyng): Consider making BenchmarkReporter::Run::memory_result an
// optional so we don't have to own the Result here.
// Can't do it now due to cxx03.
memory_results.push_back(MemoryManager::Result());
memory_result = &memory_results.back();
// Only run a few iterations to reduce the impact of one-time
// allocations in benchmarks that are not properly managed.
memory_iterations = std::min<IterationCount>(16, iters);
memory_manager->Start();
std::unique_ptr<internal::ThreadManager> manager;
manager.reset(new internal::ThreadManager(1));
b.Setup();
RunInThread(&b, memory_iterations, 0, manager.get(),
perf_counters_measurement_ptr);
manager->WaitForAllThreads();
manager.reset();
b.Teardown();
memory_manager->Stop(*memory_result);
}
// Ok, now actually report.
BenchmarkReporter::Run report =
CreateRunReport(b, i.results, memory_iterations, memory_result, i.seconds,
num_repetitions_done, repeats);
if (reports_for_family) {
++reports_for_family->num_runs_done;
if (!report.skipped) reports_for_family->Runs.push_back(report);
}
run_results.non_aggregates.push_back(report);
++num_repetitions_done;
}
RunResults&& BenchmarkRunner::GetResults() {
assert(!HasRepeatsRemaining() && "Did not run all repetitions yet?");
// Calculate additional statistics over the repetitions of this instance.
run_results.aggregates_only = ComputeStats(run_results.non_aggregates);
return std::move(run_results);
}
} // end namespace internal
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef BENCHMARK_RUNNER_H_
#define BENCHMARK_RUNNER_H_
#include <thread>
#include <vector>
#include "benchmark_api_internal.h"
#include "internal_macros.h"
#include "perf_counters.h"
#include "thread_manager.h"
namespace benchmark {
BM_DECLARE_string(benchmark_min_time);
BM_DECLARE_double(benchmark_min_warmup_time);
BM_DECLARE_int32(benchmark_repetitions);
BM_DECLARE_bool(benchmark_report_aggregates_only);
BM_DECLARE_bool(benchmark_display_aggregates_only);
BM_DECLARE_string(benchmark_perf_counters);
namespace internal {
extern MemoryManager* memory_manager;
struct RunResults {
std::vector<BenchmarkReporter::Run> non_aggregates;
std::vector<BenchmarkReporter::Run> aggregates_only;
bool display_report_aggregates_only = false;
bool file_report_aggregates_only = false;
};
struct BENCHMARK_EXPORT BenchTimeType {
enum { ITERS, TIME } tag;
union {
IterationCount iters;
double time;
};
};
BENCHMARK_EXPORT
BenchTimeType ParseBenchMinTime(const std::string& value);
class BenchmarkRunner {
public:
BenchmarkRunner(const benchmark::internal::BenchmarkInstance& b_,
benchmark::internal::PerfCountersMeasurement* pmc_,
BenchmarkReporter::PerFamilyRunReports* reports_for_family);
int GetNumRepeats() const { return repeats; }
bool HasRepeatsRemaining() const {
return GetNumRepeats() != num_repetitions_done;
}
void DoOneRepetition();
RunResults&& GetResults();
BenchmarkReporter::PerFamilyRunReports* GetReportsForFamily() const {
return reports_for_family;
}
double GetMinTime() const { return min_time; }
bool HasExplicitIters() const { return has_explicit_iteration_count; }
IterationCount GetIters() const { return iters; }
private:
RunResults run_results;
const benchmark::internal::BenchmarkInstance& b;
BenchmarkReporter::PerFamilyRunReports* reports_for_family;
BenchTimeType parsed_benchtime_flag;
const double min_time;
const double min_warmup_time;
bool warmup_done;
const int repeats;
const bool has_explicit_iteration_count;
int num_repetitions_done = 0;
std::vector<std::thread> pool;
std::vector<MemoryManager::Result> memory_results;
IterationCount iters; // preserved between repetitions!
// So only the first repetition has to find/calculate it,
// the other repetitions will just use that precomputed iteration count.
PerfCountersMeasurement* const perf_counters_measurement_ptr = nullptr;
struct IterationResults {
internal::ThreadManager::Result results;
IterationCount iters;
double seconds;
};
IterationResults DoNIterations();
IterationCount PredictNumItersNeeded(const IterationResults& i) const;
bool ShouldReportIterationResults(const IterationResults& i) const;
double GetMinTimeToApply() const;
void FinishWarmUp(const IterationCount& i);
void RunWarmUp();
};
} // namespace internal
} // end namespace benchmark
#endif // BENCHMARK_RUNNER_H_

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#include "check.h"
namespace benchmark {
namespace internal {
static AbortHandlerT* handler = &std::abort;
BENCHMARK_EXPORT AbortHandlerT*& GetAbortHandler() { return handler; }
} // namespace internal
} // namespace benchmark

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#ifndef CHECK_H_
#define CHECK_H_
#include <cmath>
#include <cstdlib>
#include <ostream>
#include "benchmark/export.h"
#include "internal_macros.h"
#include "log.h"
#if defined(__GNUC__) || defined(__clang__)
#define BENCHMARK_NOEXCEPT noexcept
#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
#elif defined(_MSC_VER) && !defined(__clang__)
#if _MSC_VER >= 1900
#define BENCHMARK_NOEXCEPT noexcept
#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
#else
#define BENCHMARK_NOEXCEPT
#define BENCHMARK_NOEXCEPT_OP(x)
#endif
#define __func__ __FUNCTION__
#else
#define BENCHMARK_NOEXCEPT
#define BENCHMARK_NOEXCEPT_OP(x)
#endif
namespace benchmark {
namespace internal {
typedef void(AbortHandlerT)();
BENCHMARK_EXPORT
AbortHandlerT*& GetAbortHandler();
BENCHMARK_NORETURN inline void CallAbortHandler() {
GetAbortHandler()();
std::abort(); // fallback to enforce noreturn
}
// CheckHandler is the class constructed by failing BM_CHECK macros.
// CheckHandler will log information about the failures and abort when it is
// destructed.
class CheckHandler {
public:
CheckHandler(const char* check, const char* file, const char* func, int line)
: log_(GetErrorLogInstance()) {
log_ << file << ":" << line << ": " << func << ": Check `" << check
<< "' failed. ";
}
LogType& GetLog() { return log_; }
#if defined(COMPILER_MSVC)
#pragma warning(push)
#pragma warning(disable : 4722)
#endif
BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
log_ << std::endl;
CallAbortHandler();
}
#if defined(COMPILER_MSVC)
#pragma warning(pop)
#endif
CheckHandler& operator=(const CheckHandler&) = delete;
CheckHandler(const CheckHandler&) = delete;
CheckHandler() = delete;
private:
LogType& log_;
};
} // end namespace internal
} // end namespace benchmark
// The BM_CHECK macro returns a std::ostream object that can have extra
// information written to it.
#ifndef NDEBUG
#define BM_CHECK(b) \
(b ? ::benchmark::internal::GetNullLogInstance() \
: ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
.GetLog())
#else
#define BM_CHECK(b) ::benchmark::internal::GetNullLogInstance()
#endif
// clang-format off
// preserve whitespacing between operators for alignment
#define BM_CHECK_EQ(a, b) BM_CHECK((a) == (b))
#define BM_CHECK_NE(a, b) BM_CHECK((a) != (b))
#define BM_CHECK_GE(a, b) BM_CHECK((a) >= (b))
#define BM_CHECK_LE(a, b) BM_CHECK((a) <= (b))
#define BM_CHECK_GT(a, b) BM_CHECK((a) > (b))
#define BM_CHECK_LT(a, b) BM_CHECK((a) < (b))
#define BM_CHECK_FLOAT_EQ(a, b, eps) BM_CHECK(std::fabs((a) - (b)) < (eps))
#define BM_CHECK_FLOAT_NE(a, b, eps) BM_CHECK(std::fabs((a) - (b)) >= (eps))
#define BM_CHECK_FLOAT_GE(a, b, eps) BM_CHECK((a) - (b) > -(eps))
#define BM_CHECK_FLOAT_LE(a, b, eps) BM_CHECK((b) - (a) > -(eps))
#define BM_CHECK_FLOAT_GT(a, b, eps) BM_CHECK((a) - (b) > (eps))
#define BM_CHECK_FLOAT_LT(a, b, eps) BM_CHECK((b) - (a) > (eps))
//clang-format on
#endif // CHECK_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "colorprint.h"
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <memory>
#include <string>
#include "check.h"
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <io.h>
#include <windows.h>
#else
#include <unistd.h>
#endif // BENCHMARK_OS_WINDOWS
namespace benchmark {
namespace {
#ifdef BENCHMARK_OS_WINDOWS
typedef WORD PlatformColorCode;
#else
typedef const char* PlatformColorCode;
#endif
PlatformColorCode GetPlatformColorCode(LogColor color) {
#ifdef BENCHMARK_OS_WINDOWS
switch (color) {
case COLOR_RED:
return FOREGROUND_RED;
case COLOR_GREEN:
return FOREGROUND_GREEN;
case COLOR_YELLOW:
return FOREGROUND_RED | FOREGROUND_GREEN;
case COLOR_BLUE:
return FOREGROUND_BLUE;
case COLOR_MAGENTA:
return FOREGROUND_BLUE | FOREGROUND_RED;
case COLOR_CYAN:
return FOREGROUND_BLUE | FOREGROUND_GREEN;
case COLOR_WHITE: // fall through to default
default:
return 0;
}
#else
switch (color) {
case COLOR_RED:
return "1";
case COLOR_GREEN:
return "2";
case COLOR_YELLOW:
return "3";
case COLOR_BLUE:
return "4";
case COLOR_MAGENTA:
return "5";
case COLOR_CYAN:
return "6";
case COLOR_WHITE:
return "7";
default:
return nullptr;
};
#endif
}
} // end namespace
std::string FormatString(const char* msg, va_list args) {
// we might need a second shot at this, so pre-emptivly make a copy
va_list args_cp;
va_copy(args_cp, args);
std::size_t size = 256;
char local_buff[256];
auto ret = vsnprintf(local_buff, size, msg, args_cp);
va_end(args_cp);
// currently there is no error handling for failure, so this is hack.
BM_CHECK(ret >= 0);
if (ret == 0) { // handle empty expansion
return {};
}
if (static_cast<size_t>(ret) < size) {
return local_buff;
}
// we did not provide a long enough buffer on our first attempt.
size = static_cast<size_t>(ret) + 1; // + 1 for the null byte
std::unique_ptr<char[]> buff(new char[size]);
ret = vsnprintf(buff.get(), size, msg, args);
BM_CHECK(ret > 0 && (static_cast<size_t>(ret)) < size);
return buff.get();
}
std::string FormatString(const char* msg, ...) {
va_list args;
va_start(args, msg);
auto tmp = FormatString(msg, args);
va_end(args);
return tmp;
}
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ColorPrintf(out, color, fmt, args);
va_end(args);
}
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
va_list args) {
#ifdef BENCHMARK_OS_WINDOWS
((void)out); // suppress unused warning
const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
// Gets the current text color.
CONSOLE_SCREEN_BUFFER_INFO buffer_info;
GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
const WORD old_color_attrs = buffer_info.wAttributes;
// We need to flush the stream buffers into the console before each
// SetConsoleTextAttribute call lest it affect the text that is already
// printed but has not yet reached the console.
out.flush();
SetConsoleTextAttribute(stdout_handle,
GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
out << FormatString(fmt, args);
out.flush();
// Restores the text color.
SetConsoleTextAttribute(stdout_handle, old_color_attrs);
#else
const char* color_code = GetPlatformColorCode(color);
if (color_code) out << FormatString("\033[0;3%sm", color_code);
out << FormatString(fmt, args) << "\033[m";
#endif
}
bool IsColorTerminal() {
#if BENCHMARK_OS_WINDOWS
// On Windows the TERM variable is usually not set, but the
// console there does support colors.
return 0 != _isatty(_fileno(stdout));
#else
// On non-Windows platforms, we rely on the TERM variable. This list of
// supported TERM values is copied from Google Test:
// <https://github.com/google/googletest/blob/v1.13.0/googletest/src/gtest.cc#L3225-L3259>.
const char* const SUPPORTED_TERM_VALUES[] = {
"xterm",
"xterm-color",
"xterm-256color",
"screen",
"screen-256color",
"tmux",
"tmux-256color",
"rxvt-unicode",
"rxvt-unicode-256color",
"linux",
"cygwin",
"xterm-kitty",
"alacritty",
"foot",
"foot-extra",
"wezterm",
};
const char* const term = getenv("TERM");
bool term_supports_color = false;
for (const char* candidate : SUPPORTED_TERM_VALUES) {
if (term && 0 == strcmp(term, candidate)) {
term_supports_color = true;
break;
}
}
return 0 != isatty(fileno(stdout)) && term_supports_color;
#endif // BENCHMARK_OS_WINDOWS
}
} // end namespace benchmark

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#ifndef BENCHMARK_COLORPRINT_H_
#define BENCHMARK_COLORPRINT_H_
#include <cstdarg>
#include <iostream>
#include <string>
namespace benchmark {
enum LogColor {
COLOR_DEFAULT,
COLOR_RED,
COLOR_GREEN,
COLOR_YELLOW,
COLOR_BLUE,
COLOR_MAGENTA,
COLOR_CYAN,
COLOR_WHITE
};
std::string FormatString(const char* msg, va_list args);
std::string FormatString(const char* msg, ...);
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
va_list args);
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
// Returns true if stdout appears to be a terminal that supports colored
// output, false otherwise.
bool IsColorTerminal();
} // end namespace benchmark
#endif // BENCHMARK_COLORPRINT_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "commandlineflags.h"
#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <limits>
#include <map>
#include <utility>
#include "../src/string_util.h"
namespace benchmark {
namespace {
// Parses 'str' for a 32-bit signed integer. If successful, writes
// the result to *value and returns true; otherwise leaves *value
// unchanged and returns false.
bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
// Parses the environment variable as a decimal integer.
char* end = nullptr;
const long long_value = strtol(str, &end, 10); // NOLINT
// Has strtol() consumed all characters in the string?
if (*end != '\0') {
// No - an invalid character was encountered.
std::cerr << src_text << " is expected to be a 32-bit integer, "
<< "but actually has value \"" << str << "\".\n";
return false;
}
// Is the parsed value in the range of an Int32?
const int32_t result = static_cast<int32_t>(long_value);
if (long_value == std::numeric_limits<long>::max() ||
long_value == std::numeric_limits<long>::min() ||
// The parsed value overflows as a long. (strtol() returns
// LONG_MAX or LONG_MIN when the input overflows.)
result != long_value
// The parsed value overflows as an Int32.
) {
std::cerr << src_text << " is expected to be a 32-bit integer, "
<< "but actually has value \"" << str << "\", "
<< "which overflows.\n";
return false;
}
*value = result;
return true;
}
// Parses 'str' for a double. If successful, writes the result to *value and
// returns true; otherwise leaves *value unchanged and returns false.
bool ParseDouble(const std::string& src_text, const char* str, double* value) {
// Parses the environment variable as a decimal integer.
char* end = nullptr;
const double double_value = strtod(str, &end); // NOLINT
// Has strtol() consumed all characters in the string?
if (*end != '\0') {
// No - an invalid character was encountered.
std::cerr << src_text << " is expected to be a double, "
<< "but actually has value \"" << str << "\".\n";
return false;
}
*value = double_value;
return true;
}
// Parses 'str' into KV pairs. If successful, writes the result to *value and
// returns true; otherwise leaves *value unchanged and returns false.
bool ParseKvPairs(const std::string& src_text, const char* str,
std::map<std::string, std::string>* value) {
std::map<std::string, std::string> kvs;
for (const auto& kvpair : StrSplit(str, ',')) {
const auto kv = StrSplit(kvpair, '=');
if (kv.size() != 2) {
std::cerr << src_text << " is expected to be a comma-separated list of "
<< "<key>=<value> strings, but actually has value \"" << str
<< "\".\n";
return false;
}
if (!kvs.emplace(kv[0], kv[1]).second) {
std::cerr << src_text << " is expected to contain unique keys but key \""
<< kv[0] << "\" was repeated.\n";
return false;
}
}
*value = kvs;
return true;
}
// Returns the name of the environment variable corresponding to the
// given flag. For example, FlagToEnvVar("foo") will return
// "BENCHMARK_FOO" in the open-source version.
static std::string FlagToEnvVar(const char* flag) {
const std::string flag_str(flag);
std::string env_var;
for (size_t i = 0; i != flag_str.length(); ++i)
env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
return env_var;
}
} // namespace
BENCHMARK_EXPORT
bool BoolFromEnv(const char* flag, bool default_val) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value_str = getenv(env_var.c_str());
return value_str == nullptr ? default_val : IsTruthyFlagValue(value_str);
}
BENCHMARK_EXPORT
int32_t Int32FromEnv(const char* flag, int32_t default_val) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value_str = getenv(env_var.c_str());
int32_t value = default_val;
if (value_str == nullptr ||
!ParseInt32(std::string("Environment variable ") + env_var, value_str,
&value)) {
return default_val;
}
return value;
}
BENCHMARK_EXPORT
double DoubleFromEnv(const char* flag, double default_val) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value_str = getenv(env_var.c_str());
double value = default_val;
if (value_str == nullptr ||
!ParseDouble(std::string("Environment variable ") + env_var, value_str,
&value)) {
return default_val;
}
return value;
}
BENCHMARK_EXPORT
const char* StringFromEnv(const char* flag, const char* default_val) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value = getenv(env_var.c_str());
return value == nullptr ? default_val : value;
}
BENCHMARK_EXPORT
std::map<std::string, std::string> KvPairsFromEnv(
const char* flag, std::map<std::string, std::string> default_val) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value_str = getenv(env_var.c_str());
if (value_str == nullptr) return default_val;
std::map<std::string, std::string> value;
if (!ParseKvPairs("Environment variable " + env_var, value_str, &value)) {
return default_val;
}
return value;
}
// Parses a string as a command line flag. The string should have
// the format "--flag=value". When def_optional is true, the "=value"
// part can be omitted.
//
// Returns the value of the flag, or nullptr if the parsing failed.
const char* ParseFlagValue(const char* str, const char* flag,
bool def_optional) {
// str and flag must not be nullptr.
if (str == nullptr || flag == nullptr) return nullptr;
// The flag must start with "--".
const std::string flag_str = std::string("--") + std::string(flag);
const size_t flag_len = flag_str.length();
if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
// Skips the flag name.
const char* flag_end = str + flag_len;
// When def_optional is true, it's OK to not have a "=value" part.
if (def_optional && (flag_end[0] == '\0')) return flag_end;
// If def_optional is true and there are more characters after the
// flag name, or if def_optional is false, there must be a '=' after
// the flag name.
if (flag_end[0] != '=') return nullptr;
// Returns the string after "=".
return flag_end + 1;
}
BENCHMARK_EXPORT
bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, true);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Converts the string value to a bool.
*value = IsTruthyFlagValue(value_str);
return true;
}
BENCHMARK_EXPORT
bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Sets *value to the value of the flag.
return ParseInt32(std::string("The value of flag --") + flag, value_str,
value);
}
BENCHMARK_EXPORT
bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Sets *value to the value of the flag.
return ParseDouble(std::string("The value of flag --") + flag, value_str,
value);
}
BENCHMARK_EXPORT
bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
*value = value_str;
return true;
}
BENCHMARK_EXPORT
bool ParseKeyValueFlag(const char* str, const char* flag,
std::map<std::string, std::string>* value) {
const char* const value_str = ParseFlagValue(str, flag, false);
if (value_str == nullptr) return false;
for (const auto& kvpair : StrSplit(value_str, ',')) {
const auto kv = StrSplit(kvpair, '=');
if (kv.size() != 2) return false;
value->emplace(kv[0], kv[1]);
}
return true;
}
BENCHMARK_EXPORT
bool IsFlag(const char* str, const char* flag) {
return (ParseFlagValue(str, flag, true) != nullptr);
}
BENCHMARK_EXPORT
bool IsTruthyFlagValue(const std::string& value) {
if (value.size() == 1) {
char v = value[0];
return isalnum(v) &&
!(v == '0' || v == 'f' || v == 'F' || v == 'n' || v == 'N');
}
if (!value.empty()) {
std::string value_lower(value);
std::transform(value_lower.begin(), value_lower.end(), value_lower.begin(),
[](char c) { return static_cast<char>(::tolower(c)); });
return !(value_lower == "false" || value_lower == "no" ||
value_lower == "off");
}
return true;
}
} // end namespace benchmark

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#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
#define BENCHMARK_COMMANDLINEFLAGS_H_
#include <cstdint>
#include <map>
#include <string>
#include "benchmark/export.h"
// Macro for referencing flags.
#define FLAG(name) FLAGS_##name
// Macros for declaring flags.
#define BM_DECLARE_bool(name) BENCHMARK_EXPORT extern bool FLAG(name)
#define BM_DECLARE_int32(name) BENCHMARK_EXPORT extern int32_t FLAG(name)
#define BM_DECLARE_double(name) BENCHMARK_EXPORT extern double FLAG(name)
#define BM_DECLARE_string(name) BENCHMARK_EXPORT extern std::string FLAG(name)
#define BM_DECLARE_kvpairs(name) \
BENCHMARK_EXPORT extern std::map<std::string, std::string> FLAG(name)
// Macros for defining flags.
#define BM_DEFINE_bool(name, default_val) \
BENCHMARK_EXPORT bool FLAG(name) = benchmark::BoolFromEnv(#name, default_val)
#define BM_DEFINE_int32(name, default_val) \
BENCHMARK_EXPORT int32_t FLAG(name) = \
benchmark::Int32FromEnv(#name, default_val)
#define BM_DEFINE_double(name, default_val) \
BENCHMARK_EXPORT double FLAG(name) = \
benchmark::DoubleFromEnv(#name, default_val)
#define BM_DEFINE_string(name, default_val) \
BENCHMARK_EXPORT std::string FLAG(name) = \
benchmark::StringFromEnv(#name, default_val)
#define BM_DEFINE_kvpairs(name, default_val) \
BENCHMARK_EXPORT std::map<std::string, std::string> FLAG(name) = \
benchmark::KvPairsFromEnv(#name, default_val)
namespace benchmark {
// Parses a bool from the environment variable corresponding to the given flag.
//
// If the variable exists, returns IsTruthyFlagValue() value; if not,
// returns the given default value.
BENCHMARK_EXPORT
bool BoolFromEnv(const char* flag, bool default_val);
// Parses an Int32 from the environment variable corresponding to the given
// flag.
//
// If the variable exists, returns ParseInt32() value; if not, returns
// the given default value.
BENCHMARK_EXPORT
int32_t Int32FromEnv(const char* flag, int32_t default_val);
// Parses an Double from the environment variable corresponding to the given
// flag.
//
// If the variable exists, returns ParseDouble(); if not, returns
// the given default value.
BENCHMARK_EXPORT
double DoubleFromEnv(const char* flag, double default_val);
// Parses a string from the environment variable corresponding to the given
// flag.
//
// If variable exists, returns its value; if not, returns
// the given default value.
BENCHMARK_EXPORT
const char* StringFromEnv(const char* flag, const char* default_val);
// Parses a set of kvpairs from the environment variable corresponding to the
// given flag.
//
// If variable exists, returns its value; if not, returns
// the given default value.
BENCHMARK_EXPORT
std::map<std::string, std::string> KvPairsFromEnv(
const char* flag, std::map<std::string, std::string> default_val);
// Parses a string for a bool flag, in the form of either
// "--flag=value" or "--flag".
//
// In the former case, the value is taken as true if it passes IsTruthyValue().
//
// In the latter case, the value is taken as true.
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
BENCHMARK_EXPORT
bool ParseBoolFlag(const char* str, const char* flag, bool* value);
// Parses a string for an Int32 flag, in the form of "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
BENCHMARK_EXPORT
bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
// Parses a string for a Double flag, in the form of "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
BENCHMARK_EXPORT
bool ParseDoubleFlag(const char* str, const char* flag, double* value);
// Parses a string for a string flag, in the form of "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
BENCHMARK_EXPORT
bool ParseStringFlag(const char* str, const char* flag, std::string* value);
// Parses a string for a kvpairs flag in the form "--flag=key=value,key=value"
//
// On success, stores the value of the flag in *value and returns true. On
// failure returns false, though *value may have been mutated.
BENCHMARK_EXPORT
bool ParseKeyValueFlag(const char* str, const char* flag,
std::map<std::string, std::string>* value);
// Returns true if the string matches the flag.
BENCHMARK_EXPORT
bool IsFlag(const char* str, const char* flag);
// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
// some non-alphanumeric character. Also returns false if the value matches
// one of 'no', 'false', 'off' (case-insensitive). As a special case, also
// returns true if value is the empty string.
BENCHMARK_EXPORT
bool IsTruthyFlagValue(const std::string& value);
} // end namespace benchmark
#endif // BENCHMARK_COMMANDLINEFLAGS_H_

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Source project : https://github.com/ismaelJimenez/cpp.leastsq
// Adapted to be used with google benchmark
#include "complexity.h"
#include <algorithm>
#include <cmath>
#include "benchmark/benchmark.h"
#include "check.h"
namespace benchmark {
// Internal function to calculate the different scalability forms
BigOFunc* FittingCurve(BigO complexity) {
static const double kLog2E = 1.44269504088896340736;
switch (complexity) {
case oN:
return [](IterationCount n) -> double { return static_cast<double>(n); };
case oNSquared:
return [](IterationCount n) -> double { return std::pow(n, 2); };
case oNCubed:
return [](IterationCount n) -> double { return std::pow(n, 3); };
case oLogN:
/* Note: can't use log2 because Android's GNU STL lacks it */
return [](IterationCount n) {
return kLog2E * std::log(static_cast<double>(n));
};
case oNLogN:
/* Note: can't use log2 because Android's GNU STL lacks it */
return [](IterationCount n) {
return kLog2E * static_cast<double>(n) *
std::log(static_cast<double>(n));
};
case o1:
default:
return [](IterationCount) { return 1.0; };
}
}
// Function to return an string for the calculated complexity
std::string GetBigOString(BigO complexity) {
switch (complexity) {
case oN:
return "N";
case oNSquared:
return "N^2";
case oNCubed:
return "N^3";
case oLogN:
return "lgN";
case oNLogN:
return "NlgN";
case o1:
return "(1)";
default:
return "f(N)";
}
}
// Find the coefficient for the high-order term in the running time, by
// minimizing the sum of squares of relative error, for the fitting curve
// given by the lambda expression.
// - n : Vector containing the size of the benchmark tests.
// - time : Vector containing the times for the benchmark tests.
// - fitting_curve : lambda expression (e.g. [](ComplexityN n) {return n; };).
// For a deeper explanation on the algorithm logic, please refer to
// https://en.wikipedia.org/wiki/Least_squares#Least_squares,_regression_analysis_and_statistics
LeastSq MinimalLeastSq(const std::vector<ComplexityN>& n,
const std::vector<double>& time,
BigOFunc* fitting_curve) {
double sigma_gn_squared = 0.0;
double sigma_time = 0.0;
double sigma_time_gn = 0.0;
// Calculate least square fitting parameter
for (size_t i = 0; i < n.size(); ++i) {
double gn_i = fitting_curve(n[i]);
sigma_gn_squared += gn_i * gn_i;
sigma_time += time[i];
sigma_time_gn += time[i] * gn_i;
}
LeastSq result;
result.complexity = oLambda;
// Calculate complexity.
result.coef = sigma_time_gn / sigma_gn_squared;
// Calculate RMS
double rms = 0.0;
for (size_t i = 0; i < n.size(); ++i) {
double fit = result.coef * fitting_curve(n[i]);
rms += std::pow((time[i] - fit), 2);
}
// Normalized RMS by the mean of the observed values
double mean = sigma_time / static_cast<double>(n.size());
result.rms = std::sqrt(rms / static_cast<double>(n.size())) / mean;
return result;
}
// Find the coefficient for the high-order term in the running time, by
// minimizing the sum of squares of relative error.
// - n : Vector containing the size of the benchmark tests.
// - time : Vector containing the times for the benchmark tests.
// - complexity : If different than oAuto, the fitting curve will stick to
// this one. If it is oAuto, it will be calculated the best
// fitting curve.
LeastSq MinimalLeastSq(const std::vector<ComplexityN>& n,
const std::vector<double>& time, const BigO complexity) {
BM_CHECK_EQ(n.size(), time.size());
BM_CHECK_GE(n.size(), 2); // Do not compute fitting curve is less than two
// benchmark runs are given
BM_CHECK_NE(complexity, oNone);
LeastSq best_fit;
if (complexity == oAuto) {
std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
// Take o1 as default best fitting curve
best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
best_fit.complexity = o1;
// Compute all possible fitting curves and stick to the best one
for (const auto& fit : fit_curves) {
LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
if (current_fit.rms < best_fit.rms) {
best_fit = current_fit;
best_fit.complexity = fit;
}
}
} else {
best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
best_fit.complexity = complexity;
}
return best_fit;
}
std::vector<BenchmarkReporter::Run> ComputeBigO(
const std::vector<BenchmarkReporter::Run>& reports) {
typedef BenchmarkReporter::Run Run;
std::vector<Run> results;
if (reports.size() < 2) return results;
// Accumulators.
std::vector<ComplexityN> n;
std::vector<double> real_time;
std::vector<double> cpu_time;
// Populate the accumulators.
for (const Run& run : reports) {
BM_CHECK_GT(run.complexity_n, 0)
<< "Did you forget to call SetComplexityN?";
n.push_back(run.complexity_n);
real_time.push_back(run.real_accumulated_time /
static_cast<double>(run.iterations));
cpu_time.push_back(run.cpu_accumulated_time /
static_cast<double>(run.iterations));
}
LeastSq result_cpu;
LeastSq result_real;
if (reports[0].complexity == oLambda) {
result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
} else {
const BigO* InitialBigO = &reports[0].complexity;
const bool use_real_time_for_initial_big_o =
reports[0].use_real_time_for_initial_big_o;
if (use_real_time_for_initial_big_o) {
result_real = MinimalLeastSq(n, real_time, *InitialBigO);
InitialBigO = &result_real.complexity;
// The Big-O complexity for CPU time must have the same Big-O function!
}
result_cpu = MinimalLeastSq(n, cpu_time, *InitialBigO);
InitialBigO = &result_cpu.complexity;
if (!use_real_time_for_initial_big_o) {
result_real = MinimalLeastSq(n, real_time, *InitialBigO);
}
}
// Drop the 'args' when reporting complexity.
auto run_name = reports[0].run_name;
run_name.args.clear();
// Get the data from the accumulator to BenchmarkReporter::Run's.
Run big_o;
big_o.run_name = run_name;
big_o.family_index = reports[0].family_index;
big_o.per_family_instance_index = reports[0].per_family_instance_index;
big_o.run_type = BenchmarkReporter::Run::RT_Aggregate;
big_o.repetitions = reports[0].repetitions;
big_o.repetition_index = Run::no_repetition_index;
big_o.threads = reports[0].threads;
big_o.aggregate_name = "BigO";
big_o.aggregate_unit = StatisticUnit::kTime;
big_o.report_label = reports[0].report_label;
big_o.iterations = 0;
big_o.real_accumulated_time = result_real.coef;
big_o.cpu_accumulated_time = result_cpu.coef;
big_o.report_big_o = true;
big_o.complexity = result_cpu.complexity;
// All the time results are reported after being multiplied by the
// time unit multiplier. But since RMS is a relative quantity it
// should not be multiplied at all. So, here, we _divide_ it by the
// multiplier so that when it is multiplied later the result is the
// correct one.
double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
// Only add label to mean/stddev if it is same for all runs
Run rms;
rms.run_name = run_name;
rms.family_index = reports[0].family_index;
rms.per_family_instance_index = reports[0].per_family_instance_index;
rms.run_type = BenchmarkReporter::Run::RT_Aggregate;
rms.aggregate_name = "RMS";
rms.aggregate_unit = StatisticUnit::kPercentage;
rms.report_label = big_o.report_label;
rms.iterations = 0;
rms.repetition_index = Run::no_repetition_index;
rms.repetitions = reports[0].repetitions;
rms.threads = reports[0].threads;
rms.real_accumulated_time = result_real.rms / multiplier;
rms.cpu_accumulated_time = result_cpu.rms / multiplier;
rms.report_rms = true;
rms.complexity = result_cpu.complexity;
// don't forget to keep the time unit, or we won't be able to
// recover the correct value.
rms.time_unit = reports[0].time_unit;
results.push_back(big_o);
results.push_back(rms);
return results;
}
} // end namespace benchmark

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Source project : https://github.com/ismaelJimenez/cpp.leastsq
// Adapted to be used with google benchmark
#ifndef COMPLEXITY_H_
#define COMPLEXITY_H_
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
namespace benchmark {
// Return a vector containing the bigO and RMS information for the specified
// list of reports. If 'reports.size() < 2' an empty vector is returned.
std::vector<BenchmarkReporter::Run> ComputeBigO(
const std::vector<BenchmarkReporter::Run>& reports);
// This data structure will contain the result returned by MinimalLeastSq
// - coef : Estimated coefficient for the high-order term as
// interpolated from data.
// - rms : Normalized Root Mean Squared Error.
// - complexity : Scalability form (e.g. oN, oNLogN). In case a scalability
// form has been provided to MinimalLeastSq this will return
// the same value. In case BigO::oAuto has been selected, this
// parameter will return the best fitting curve detected.
struct LeastSq {
LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
double coef;
double rms;
BigO complexity;
};
// Function to return an string for the calculated complexity
std::string GetBigOString(BigO complexity);
} // end namespace benchmark
#endif // COMPLEXITY_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <algorithm>
#include <cstdint>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#include "benchmark/benchmark.h"
#include "check.h"
#include "colorprint.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "counter.h"
#include "internal_macros.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
BENCHMARK_EXPORT
bool ConsoleReporter::ReportContext(const Context& context) {
name_field_width_ = context.name_field_width;
printed_header_ = false;
prev_counters_.clear();
PrintBasicContext(&GetErrorStream(), context);
#ifdef BENCHMARK_OS_WINDOWS
if ((output_options_ & OO_Color)) {
auto stdOutBuf = std::cout.rdbuf();
auto outStreamBuf = GetOutputStream().rdbuf();
if (stdOutBuf != outStreamBuf) {
GetErrorStream()
<< "Color printing is only supported for stdout on windows."
" Disabling color printing\n";
output_options_ = static_cast<OutputOptions>(output_options_ & ~OO_Color);
}
}
#endif
return true;
}
BENCHMARK_EXPORT
void ConsoleReporter::PrintHeader(const Run& run) {
std::string str =
FormatString("%-*s %13s %15s %12s", static_cast<int>(name_field_width_),
"Benchmark", "Time", "CPU", "Iterations");
if (!run.counters.empty()) {
if (output_options_ & OO_Tabular) {
for (auto const& c : run.counters) {
str += FormatString(" %10s", c.first.c_str());
}
} else {
str += " UserCounters...";
}
}
std::string line = std::string(str.length(), '-');
GetOutputStream() << line << "\n" << str << "\n" << line << "\n";
}
BENCHMARK_EXPORT
void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
for (const auto& run : reports) {
// print the header:
// --- if none was printed yet
bool print_header = !printed_header_;
// --- or if the format is tabular and this run
// has different fields from the prev header
print_header |= (output_options_ & OO_Tabular) &&
(!internal::SameNames(run.counters, prev_counters_));
if (print_header) {
printed_header_ = true;
prev_counters_ = run.counters;
PrintHeader(run);
}
// As an alternative to printing the headers like this, we could sort
// the benchmarks by header and then print. But this would require
// waiting for the full results before printing, or printing twice.
PrintRunData(run);
}
}
static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
...) {
va_list args;
va_start(args, fmt);
out << FormatString(fmt, args);
va_end(args);
}
static std::string FormatTime(double time) {
// For the time columns of the console printer 13 digits are reserved. One of
// them is a space and max two of them are the time unit (e.g ns). That puts
// us at 10 digits usable for the number.
// Align decimal places...
if (time < 1.0) {
return FormatString("%10.3f", time);
}
if (time < 10.0) {
return FormatString("%10.2f", time);
}
if (time < 100.0) {
return FormatString("%10.1f", time);
}
// Assuming the time is at max 9.9999e+99 and we have 10 digits for the
// number, we get 10-1(.)-1(e)-1(sign)-2(exponent) = 5 digits to print.
if (time > 9999999999 /*max 10 digit number*/) {
return FormatString("%1.4e", time);
}
return FormatString("%10.0f", time);
}
BENCHMARK_EXPORT
void ConsoleReporter::PrintRunData(const Run& result) {
typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
auto& Out = GetOutputStream();
PrinterFn* printer = (output_options_ & OO_Color)
? static_cast<PrinterFn*>(ColorPrintf)
: IgnoreColorPrint;
auto name_color =
(result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
printer(Out, name_color, "%-*s ", name_field_width_,
result.benchmark_name().c_str());
if (internal::SkippedWithError == result.skipped) {
printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
result.skip_message.c_str());
printer(Out, COLOR_DEFAULT, "\n");
return;
} else if (internal::SkippedWithMessage == result.skipped) {
printer(Out, COLOR_WHITE, "SKIPPED: \'%s\'", result.skip_message.c_str());
printer(Out, COLOR_DEFAULT, "\n");
return;
}
const double real_time = result.GetAdjustedRealTime();
const double cpu_time = result.GetAdjustedCPUTime();
const std::string real_time_str = FormatTime(real_time);
const std::string cpu_time_str = FormatTime(cpu_time);
if (result.report_big_o) {
std::string big_o = GetBigOString(result.complexity);
printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ", real_time,
big_o.c_str(), cpu_time, big_o.c_str());
} else if (result.report_rms) {
printer(Out, COLOR_YELLOW, "%10.0f %-4s %10.0f %-4s ", real_time * 100, "%",
cpu_time * 100, "%");
} else if (result.run_type != Run::RT_Aggregate ||
result.aggregate_unit == StatisticUnit::kTime) {
const char* timeLabel = GetTimeUnitString(result.time_unit);
printer(Out, COLOR_YELLOW, "%s %-4s %s %-4s ", real_time_str.c_str(),
timeLabel, cpu_time_str.c_str(), timeLabel);
} else {
assert(result.aggregate_unit == StatisticUnit::kPercentage);
printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ",
(100. * result.real_accumulated_time), "%",
(100. * result.cpu_accumulated_time), "%");
}
if (!result.report_big_o && !result.report_rms) {
printer(Out, COLOR_CYAN, "%10lld", result.iterations);
}
for (auto& c : result.counters) {
const std::size_t cNameLen =
std::max(std::string::size_type(10), c.first.length());
std::string s;
const char* unit = "";
if (result.run_type == Run::RT_Aggregate &&
result.aggregate_unit == StatisticUnit::kPercentage) {
s = StrFormat("%.2f", 100. * c.second.value);
unit = "%";
} else {
s = HumanReadableNumber(c.second.value, c.second.oneK);
if (c.second.flags & Counter::kIsRate)
unit = (c.second.flags & Counter::kInvert) ? "s" : "/s";
}
if (output_options_ & OO_Tabular) {
printer(Out, COLOR_DEFAULT, " %*s%s", cNameLen - strlen(unit), s.c_str(),
unit);
} else {
printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(), unit);
}
}
if (!result.report_label.empty()) {
printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
}
printer(Out, COLOR_DEFAULT, "\n");
}
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "counter.h"
namespace benchmark {
namespace internal {
double Finish(Counter const& c, IterationCount iterations, double cpu_time,
double num_threads) {
double v = c.value;
if (c.flags & Counter::kIsRate) {
v /= cpu_time;
}
if (c.flags & Counter::kAvgThreads) {
v /= num_threads;
}
if (c.flags & Counter::kIsIterationInvariant) {
v *= static_cast<double>(iterations);
}
if (c.flags & Counter::kAvgIterations) {
v /= static_cast<double>(iterations);
}
if (c.flags & Counter::kInvert) { // Invert is *always* last.
v = 1.0 / v;
}
return v;
}
void Finish(UserCounters* l, IterationCount iterations, double cpu_time,
double num_threads) {
for (auto& c : *l) {
c.second.value = Finish(c.second, iterations, cpu_time, num_threads);
}
}
void Increment(UserCounters* l, UserCounters const& r) {
// add counters present in both or just in *l
for (auto& c : *l) {
auto it = r.find(c.first);
if (it != r.end()) {
c.second.value = c.second + it->second;
}
}
// add counters present in r, but not in *l
for (auto const& tc : r) {
auto it = l->find(tc.first);
if (it == l->end()) {
(*l)[tc.first] = tc.second;
}
}
}
bool SameNames(UserCounters const& l, UserCounters const& r) {
if (&l == &r) return true;
if (l.size() != r.size()) {
return false;
}
for (auto const& c : l) {
if (r.find(c.first) == r.end()) {
return false;
}
}
return true;
}
} // end namespace internal
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef BENCHMARK_COUNTER_H_
#define BENCHMARK_COUNTER_H_
#include "benchmark/benchmark.h"
namespace benchmark {
// these counter-related functions are hidden to reduce API surface.
namespace internal {
void Finish(UserCounters* l, IterationCount iterations, double time,
double num_threads);
void Increment(UserCounters* l, UserCounters const& r);
bool SameNames(UserCounters const& l, UserCounters const& r);
} // end namespace internal
} // end namespace benchmark
#endif // BENCHMARK_COUNTER_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <algorithm>
#include <cstdint>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#include "benchmark/benchmark.h"
#include "check.h"
#include "complexity.h"
#include "string_util.h"
#include "timers.h"
// File format reference: http://edoceo.com/utilitas/csv-file-format.
namespace benchmark {
namespace {
std::vector<std::string> elements = {
"name", "iterations", "real_time", "cpu_time",
"time_unit", "bytes_per_second", "items_per_second", "label",
"error_occurred", "error_message"};
} // namespace
std::string CsvEscape(const std::string& s) {
std::string tmp;
tmp.reserve(s.size() + 2);
for (char c : s) {
switch (c) {
case '"':
tmp += "\"\"";
break;
default:
tmp += c;
break;
}
}
return '"' + tmp + '"';
}
BENCHMARK_EXPORT
bool CSVReporter::ReportContext(const Context& context) {
PrintBasicContext(&GetErrorStream(), context);
return true;
}
BENCHMARK_EXPORT
void CSVReporter::ReportRuns(const std::vector<Run>& reports) {
std::ostream& Out = GetOutputStream();
if (!printed_header_) {
// save the names of all the user counters
for (const auto& run : reports) {
for (const auto& cnt : run.counters) {
if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
continue;
user_counter_names_.insert(cnt.first);
}
}
// print the header
for (auto B = elements.begin(); B != elements.end();) {
Out << *B++;
if (B != elements.end()) Out << ",";
}
for (auto B = user_counter_names_.begin();
B != user_counter_names_.end();) {
Out << ",\"" << *B++ << "\"";
}
Out << "\n";
printed_header_ = true;
} else {
// check that all the current counters are saved in the name set
for (const auto& run : reports) {
for (const auto& cnt : run.counters) {
if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
continue;
BM_CHECK(user_counter_names_.find(cnt.first) !=
user_counter_names_.end())
<< "All counters must be present in each run. "
<< "Counter named \"" << cnt.first
<< "\" was not in a run after being added to the header";
}
}
}
// print results for each run
for (const auto& run : reports) {
PrintRunData(run);
}
}
BENCHMARK_EXPORT
void CSVReporter::PrintRunData(const Run& run) {
std::ostream& Out = GetOutputStream();
Out << CsvEscape(run.benchmark_name()) << ",";
if (run.skipped) {
Out << std::string(elements.size() - 3, ',');
Out << std::boolalpha << (internal::SkippedWithError == run.skipped) << ",";
Out << CsvEscape(run.skip_message) << "\n";
return;
}
// Do not print iteration on bigO and RMS report
if (!run.report_big_o && !run.report_rms) {
Out << run.iterations;
}
Out << ",";
if (run.run_type != Run::RT_Aggregate ||
run.aggregate_unit == StatisticUnit::kTime) {
Out << run.GetAdjustedRealTime() << ",";
Out << run.GetAdjustedCPUTime() << ",";
} else {
assert(run.aggregate_unit == StatisticUnit::kPercentage);
Out << run.real_accumulated_time << ",";
Out << run.cpu_accumulated_time << ",";
}
// Do not print timeLabel on bigO and RMS report
if (run.report_big_o) {
Out << GetBigOString(run.complexity);
} else if (!run.report_rms &&
run.aggregate_unit != StatisticUnit::kPercentage) {
Out << GetTimeUnitString(run.time_unit);
}
Out << ",";
if (run.counters.find("bytes_per_second") != run.counters.end()) {
Out << run.counters.at("bytes_per_second");
}
Out << ",";
if (run.counters.find("items_per_second") != run.counters.end()) {
Out << run.counters.at("items_per_second");
}
Out << ",";
if (!run.report_label.empty()) {
Out << CsvEscape(run.report_label);
}
Out << ",,"; // for error_occurred and error_message
// Print user counters
for (const auto& ucn : user_counter_names_) {
auto it = run.counters.find(ucn);
if (it == run.counters.end()) {
Out << ",";
} else {
Out << "," << it->second;
}
}
Out << '\n';
}
} // end namespace benchmark

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// ----------------------------------------------------------------------
// CycleClock
// A CycleClock tells you the current time in Cycles. The "time"
// is actually time since power-on. This is like time() but doesn't
// involve a system call and is much more precise.
//
// NOTE: Not all cpu/platform/kernel combinations guarantee that this
// clock increments at a constant rate or is synchronized across all logical
// cpus in a system.
//
// If you need the above guarantees, please consider using a different
// API. There are efforts to provide an interface which provides a millisecond
// granularity and implemented as a memory read. A memory read is generally
// cheaper than the CycleClock for many architectures.
//
// Also, in some out of order CPU implementations, the CycleClock is not
// serializing. So if you're trying to count at cycles granularity, your
// data might be inaccurate due to out of order instruction execution.
// ----------------------------------------------------------------------
#ifndef BENCHMARK_CYCLECLOCK_H_
#define BENCHMARK_CYCLECLOCK_H_
#include <cstdint>
#include "benchmark/benchmark.h"
#include "internal_macros.h"
#if defined(BENCHMARK_OS_MACOSX)
#include <mach/mach_time.h>
#endif
// For MSVC, we want to use '_asm rdtsc' when possible (since it works
// with even ancient MSVC compilers), and when not possible the
// __rdtsc intrinsic, declared in <intrin.h>. Unfortunately, in some
// environments, <windows.h> and <intrin.h> have conflicting
// declarations of some other intrinsics, breaking compilation.
// Therefore, we simply declare __rdtsc ourselves. See also
// http://connect.microsoft.com/VisualStudio/feedback/details/262047
#if defined(COMPILER_MSVC) && !defined(_M_IX86) && !defined(_M_ARM64) && \
!defined(_M_ARM64EC)
extern "C" uint64_t __rdtsc();
#pragma intrinsic(__rdtsc)
#endif
#if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)
#include <sys/time.h>
#include <time.h>
#endif
#ifdef BENCHMARK_OS_EMSCRIPTEN
#include <emscripten.h>
#endif
namespace benchmark {
// NOTE: only i386 and x86_64 have been well tested.
// PPC, sparc, alpha, and ia64 are based on
// http://peter.kuscsik.com/wordpress/?p=14
// with modifications by m3b. See also
// https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
namespace cycleclock {
// This should return the number of cycles since power-on. Thread-safe.
inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
#if defined(BENCHMARK_OS_MACOSX)
// this goes at the top because we need ALL Macs, regardless of
// architecture, to return the number of "mach time units" that
// have passed since startup. See sysinfo.cc where
// InitializeSystemInfo() sets the supposed cpu clock frequency of
// macs to the number of mach time units per second, not actual
// CPU clock frequency (which can change in the face of CPU
// frequency scaling). Also note that when the Mac sleeps, this
// counter pauses; it does not continue counting, nor does it
// reset to zero.
return static_cast<int64_t>(mach_absolute_time());
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// this goes above x86-specific code because old versions of Emscripten
// define __x86_64__, although they have nothing to do with it.
return static_cast<int64_t>(emscripten_get_now() * 1e+6);
#elif defined(__i386__)
int64_t ret;
__asm__ volatile("rdtsc" : "=A"(ret));
return ret;
#elif defined(__x86_64__) || defined(__amd64__)
uint64_t low, high;
__asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
return static_cast<int64_t>((high << 32) | low);
#elif defined(__powerpc__) || defined(__ppc__)
// This returns a time-base, which is not always precisely a cycle-count.
#if defined(__powerpc64__) || defined(__ppc64__)
int64_t tb;
asm volatile("mfspr %0, 268" : "=r"(tb));
return tb;
#else
uint32_t tbl, tbu0, tbu1;
asm volatile(
"mftbu %0\n"
"mftb %1\n"
"mftbu %2"
: "=r"(tbu0), "=r"(tbl), "=r"(tbu1));
tbl &= -static_cast<int32_t>(tbu0 == tbu1);
// high 32 bits in tbu1; low 32 bits in tbl (tbu0 is no longer needed)
return (static_cast<uint64_t>(tbu1) << 32) | tbl;
#endif
#elif defined(__sparc__)
int64_t tick;
asm(".byte 0x83, 0x41, 0x00, 0x00");
asm("mov %%g1, %0" : "=r"(tick));
return tick;
#elif defined(__ia64__)
int64_t itc;
asm("mov %0 = ar.itc" : "=r"(itc));
return itc;
#elif defined(COMPILER_MSVC) && defined(_M_IX86)
// Older MSVC compilers (like 7.x) don't seem to support the
// __rdtsc intrinsic properly, so I prefer to use _asm instead
// when I know it will work. Otherwise, I'll use __rdtsc and hope
// the code is being compiled with a non-ancient compiler.
_asm rdtsc
#elif defined(COMPILER_MSVC) && (defined(_M_ARM64) || defined(_M_ARM64EC))
// See // https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics
// and https://reviews.llvm.org/D53115
int64_t virtual_timer_value;
virtual_timer_value = _ReadStatusReg(ARM64_CNTVCT);
return virtual_timer_value;
#elif defined(COMPILER_MSVC)
return __rdtsc();
#elif defined(BENCHMARK_OS_NACL)
// Native Client validator on x86/x86-64 allows RDTSC instructions,
// and this case is handled above. Native Client validator on ARM
// rejects MRC instructions (used in the ARM-specific sequence below),
// so we handle it here. Portable Native Client compiles to
// architecture-agnostic bytecode, which doesn't provide any
// cycle counter access mnemonics.
// Native Client does not provide any API to access cycle counter.
// Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
// because is provides nanosecond resolution (which is noticeable at
// least for PNaCl modules running on x86 Mac & Linux).
// Initialize to always return 0 if clock_gettime fails.
struct timespec ts = {0, 0};
clock_gettime(CLOCK_MONOTONIC, &ts);
return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
#elif defined(__aarch64__)
// System timer of ARMv8 runs at a different frequency than the CPU's.
// The frequency is fixed, typically in the range 1-50MHz. It can be
// read at CNTFRQ special register. We assume the OS has set up
// the virtual timer properly.
int64_t virtual_timer_value;
asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
return virtual_timer_value;
#elif defined(__ARM_ARCH)
// V6 is the earliest arch that has a standard cyclecount
// Native Client validator doesn't allow MRC instructions.
#if (__ARM_ARCH >= 6)
uint32_t pmccntr;
uint32_t pmuseren;
uint32_t pmcntenset;
// Read the user mode perf monitor counter access permissions.
asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
if (pmuseren & 1) { // Allows reading perfmon counters for user mode code.
asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
if (pmcntenset & 0x80000000ul) { // Is it counting?
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
// The counter is set up to count every 64th cycle
return static_cast<int64_t>(pmccntr) * 64; // Should optimize to << 6
}
}
#endif
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__mips__) || defined(__m68k__)
// mips apparently only allows rdtsc for superusers, so we fall
// back to gettimeofday. It's possible clock_gettime would be better.
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__loongarch__) || defined(__csky__)
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__s390__) // Covers both s390 and s390x.
// Return the CPU clock.
uint64_t tsc;
#if defined(BENCHMARK_OS_ZOS)
// z/OS HLASM syntax.
asm(" stck %0" : "=m"(tsc) : : "cc");
#else
// Linux on Z syntax.
asm("stck %0" : "=Q"(tsc) : : "cc");
#endif
return tsc;
#elif defined(__riscv) // RISC-V
// Use RDTIME (and RDTIMEH on riscv32).
// RDCYCLE is a privileged instruction since Linux 6.6.
#if __riscv_xlen == 32
uint32_t cycles_lo, cycles_hi0, cycles_hi1;
// This asm also includes the PowerPC overflow handling strategy, as above.
// Implemented in assembly because Clang insisted on branching.
asm volatile(
"rdtimeh %0\n"
"rdtime %1\n"
"rdtimeh %2\n"
"sub %0, %0, %2\n"
"seqz %0, %0\n"
"sub %0, zero, %0\n"
"and %1, %1, %0\n"
: "=r"(cycles_hi0), "=r"(cycles_lo), "=r"(cycles_hi1));
return (static_cast<uint64_t>(cycles_hi1) << 32) | cycles_lo;
#else
uint64_t cycles;
asm volatile("rdtime %0" : "=r"(cycles));
return cycles;
#endif
#elif defined(__e2k__) || defined(__elbrus__)
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__hexagon__)
uint64_t pcycle;
asm volatile("%0 = C15:14" : "=r"(pcycle));
return static_cast<double>(pcycle);
#elif defined(__alpha__)
// Alpha has a cycle counter, the PCC register, but it is an unsigned 32-bit
// integer and thus wraps every ~4s, making using it for tick counts
// unreliable beyond this time range. The real-time clock is low-precision,
// roughtly ~1ms, but it is the only option that can reasonable count
// indefinitely.
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#else
// The soft failover to a generic implementation is automatic only for ARM.
// For other platforms the developer is expected to make an attempt to create
// a fast implementation and use generic version if nothing better is
// available.
#error You need to define CycleTimer for your OS and CPU
#endif
}
} // end namespace cycleclock
} // end namespace benchmark
#endif // BENCHMARK_CYCLECLOCK_H_

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third_party/benchmark/src/internal_macros.h vendored Normal file
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#ifndef BENCHMARK_INTERNAL_MACROS_H_
#define BENCHMARK_INTERNAL_MACROS_H_
/* Needed to detect STL */
#include <cstdlib>
// clang-format off
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#if defined(__clang__)
#if !defined(COMPILER_CLANG)
#define COMPILER_CLANG
#endif
#elif defined(_MSC_VER)
#if !defined(COMPILER_MSVC)
#define COMPILER_MSVC
#endif
#elif defined(__GNUC__)
#if !defined(COMPILER_GCC)
#define COMPILER_GCC
#endif
#endif
#if __has_feature(cxx_attributes)
#define BENCHMARK_NORETURN [[noreturn]]
#elif defined(__GNUC__)
#define BENCHMARK_NORETURN __attribute__((noreturn))
#elif defined(COMPILER_MSVC)
#define BENCHMARK_NORETURN __declspec(noreturn)
#else
#define BENCHMARK_NORETURN
#endif
#if defined(__CYGWIN__)
#define BENCHMARK_OS_CYGWIN 1
#elif defined(_WIN32)
#define BENCHMARK_OS_WINDOWS 1
// WINAPI_FAMILY_PARTITION is defined in winapifamily.h.
// We include windows.h which implicitly includes winapifamily.h for compatibility.
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h>
#if defined(WINAPI_FAMILY_PARTITION)
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
#define BENCHMARK_OS_WINDOWS_WIN32 1
#elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
#define BENCHMARK_OS_WINDOWS_RT 1
#endif
#endif
#if defined(__MINGW32__)
#define BENCHMARK_OS_MINGW 1
#endif
#elif defined(__APPLE__)
#define BENCHMARK_OS_APPLE 1
#include "TargetConditionals.h"
#if defined(TARGET_OS_MAC)
#define BENCHMARK_OS_MACOSX 1
#if defined(TARGET_OS_IPHONE)
#define BENCHMARK_OS_IOS 1
#endif
#endif
#elif defined(__FreeBSD__)
#define BENCHMARK_OS_FREEBSD 1
#elif defined(__NetBSD__)
#define BENCHMARK_OS_NETBSD 1
#elif defined(__OpenBSD__)
#define BENCHMARK_OS_OPENBSD 1
#elif defined(__DragonFly__)
#define BENCHMARK_OS_DRAGONFLY 1
#elif defined(__linux__)
#define BENCHMARK_OS_LINUX 1
#elif defined(__native_client__)
#define BENCHMARK_OS_NACL 1
#elif defined(__EMSCRIPTEN__)
#define BENCHMARK_OS_EMSCRIPTEN 1
#elif defined(__rtems__)
#define BENCHMARK_OS_RTEMS 1
#elif defined(__Fuchsia__)
#define BENCHMARK_OS_FUCHSIA 1
#elif defined (__SVR4) && defined (__sun)
#define BENCHMARK_OS_SOLARIS 1
#elif defined(__QNX__)
#define BENCHMARK_OS_QNX 1
#elif defined(__MVS__)
#define BENCHMARK_OS_ZOS 1
#elif defined(__hexagon__)
#define BENCHMARK_OS_QURT 1
#endif
#if defined(__ANDROID__) && defined(__GLIBCXX__)
#define BENCHMARK_STL_ANDROID_GNUSTL 1
#endif
#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
&& !defined(__EXCEPTIONS)
#define BENCHMARK_HAS_NO_EXCEPTIONS
#endif
#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
#define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
#else
#define BENCHMARK_MAYBE_UNUSED
#endif
// clang-format on
#endif // BENCHMARK_INTERNAL_MACROS_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <algorithm>
#include <cmath>
#include <cstdint>
#include <iomanip> // for setprecision
#include <iostream>
#include <limits>
#include <string>
#include <tuple>
#include <vector>
#include "benchmark/benchmark.h"
#include "complexity.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
namespace {
std::string StrEscape(const std::string& s) {
std::string tmp;
tmp.reserve(s.size());
for (char c : s) {
switch (c) {
case '\b':
tmp += "\\b";
break;
case '\f':
tmp += "\\f";
break;
case '\n':
tmp += "\\n";
break;
case '\r':
tmp += "\\r";
break;
case '\t':
tmp += "\\t";
break;
case '\\':
tmp += "\\\\";
break;
case '"':
tmp += "\\\"";
break;
default:
tmp += c;
break;
}
}
return tmp;
}
std::string FormatKV(std::string const& key, std::string const& value) {
return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
StrEscape(value).c_str());
}
std::string FormatKV(std::string const& key, const char* value) {
return StrFormat("\"%s\": \"%s\"", StrEscape(key).c_str(),
StrEscape(value).c_str());
}
std::string FormatKV(std::string const& key, bool value) {
return StrFormat("\"%s\": %s", StrEscape(key).c_str(),
value ? "true" : "false");
}
std::string FormatKV(std::string const& key, int64_t value) {
std::stringstream ss;
ss << '"' << StrEscape(key) << "\": " << value;
return ss.str();
}
std::string FormatKV(std::string const& key, double value) {
std::stringstream ss;
ss << '"' << StrEscape(key) << "\": ";
if (std::isnan(value))
ss << (value < 0 ? "-" : "") << "NaN";
else if (std::isinf(value))
ss << (value < 0 ? "-" : "") << "Infinity";
else {
const auto max_digits10 =
std::numeric_limits<decltype(value)>::max_digits10;
const auto max_fractional_digits10 = max_digits10 - 1;
ss << std::scientific << std::setprecision(max_fractional_digits10)
<< value;
}
return ss.str();
}
int64_t RoundDouble(double v) { return std::lround(v); }
} // end namespace
bool JSONReporter::ReportContext(const Context& context) {
std::ostream& out = GetOutputStream();
out << "{\n";
std::string inner_indent(2, ' ');
// Open context block and print context information.
out << inner_indent << "\"context\": {\n";
std::string indent(4, ' ');
std::string walltime_value = LocalDateTimeString();
out << indent << FormatKV("date", walltime_value) << ",\n";
out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
if (Context::executable_name) {
out << indent << FormatKV("executable", Context::executable_name) << ",\n";
}
CPUInfo const& info = context.cpu_info;
out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
<< ",\n";
out << indent
<< FormatKV("mhz_per_cpu",
RoundDouble(info.cycles_per_second / 1000000.0))
<< ",\n";
if (CPUInfo::Scaling::UNKNOWN != info.scaling) {
out << indent
<< FormatKV("cpu_scaling_enabled",
info.scaling == CPUInfo::Scaling::ENABLED ? true : false)
<< ",\n";
}
out << indent << "\"caches\": [\n";
indent = std::string(6, ' ');
std::string cache_indent(8, ' ');
for (size_t i = 0; i < info.caches.size(); ++i) {
auto& CI = info.caches[i];
out << indent << "{\n";
out << cache_indent << FormatKV("type", CI.type) << ",\n";
out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
<< ",\n";
out << cache_indent << FormatKV("size", static_cast<int64_t>(CI.size))
<< ",\n";
out << cache_indent
<< FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
<< "\n";
out << indent << "}";
if (i != info.caches.size() - 1) out << ",";
out << "\n";
}
indent = std::string(4, ' ');
out << indent << "],\n";
out << indent << "\"load_avg\": [";
for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
out << *it++;
if (it != info.load_avg.end()) out << ",";
}
out << "],\n";
out << indent << FormatKV("library_version", GetBenchmarkVersion());
out << ",\n";
#if defined(NDEBUG)
const char build_type[] = "release";
#else
const char build_type[] = "debug";
#endif
out << indent << FormatKV("library_build_type", build_type);
out << ",\n";
// NOTE: our json schema is not strictly tied to the library version!
out << indent << FormatKV("json_schema_version", int64_t(1));
std::map<std::string, std::string>* global_context =
internal::GetGlobalContext();
if (global_context != nullptr) {
for (const auto& kv : *global_context) {
out << ",\n";
out << indent << FormatKV(kv.first, kv.second);
}
}
out << "\n";
// Close context block and open the list of benchmarks.
out << inner_indent << "},\n";
out << inner_indent << "\"benchmarks\": [\n";
return true;
}
void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
if (reports.empty()) {
return;
}
std::string indent(4, ' ');
std::ostream& out = GetOutputStream();
if (!first_report_) {
out << ",\n";
}
first_report_ = false;
for (auto it = reports.begin(); it != reports.end(); ++it) {
out << indent << "{\n";
PrintRunData(*it);
out << indent << '}';
auto it_cp = it;
if (++it_cp != reports.end()) {
out << ",\n";
}
}
}
void JSONReporter::Finalize() {
// Close the list of benchmarks and the top level object.
GetOutputStream() << "\n ]\n}\n";
}
void JSONReporter::PrintRunData(Run const& run) {
std::string indent(6, ' ');
std::ostream& out = GetOutputStream();
out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
out << indent << FormatKV("family_index", run.family_index) << ",\n";
out << indent
<< FormatKV("per_family_instance_index", run.per_family_instance_index)
<< ",\n";
out << indent << FormatKV("run_name", run.run_name.str()) << ",\n";
out << indent << FormatKV("run_type", [&run]() -> const char* {
switch (run.run_type) {
case BenchmarkReporter::Run::RT_Iteration:
return "iteration";
case BenchmarkReporter::Run::RT_Aggregate:
return "aggregate";
}
BENCHMARK_UNREACHABLE();
}()) << ",\n";
out << indent << FormatKV("repetitions", run.repetitions) << ",\n";
if (run.run_type != BenchmarkReporter::Run::RT_Aggregate) {
out << indent << FormatKV("repetition_index", run.repetition_index)
<< ",\n";
}
out << indent << FormatKV("threads", run.threads) << ",\n";
if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
out << indent << FormatKV("aggregate_unit", [&run]() -> const char* {
switch (run.aggregate_unit) {
case StatisticUnit::kTime:
return "time";
case StatisticUnit::kPercentage:
return "percentage";
}
BENCHMARK_UNREACHABLE();
}()) << ",\n";
}
if (internal::SkippedWithError == run.skipped) {
out << indent << FormatKV("error_occurred", true) << ",\n";
out << indent << FormatKV("error_message", run.skip_message) << ",\n";
} else if (internal::SkippedWithMessage == run.skipped) {
out << indent << FormatKV("skipped", true) << ",\n";
out << indent << FormatKV("skip_message", run.skip_message) << ",\n";
}
if (!run.report_big_o && !run.report_rms) {
out << indent << FormatKV("iterations", run.iterations) << ",\n";
if (run.run_type != Run::RT_Aggregate ||
run.aggregate_unit == StatisticUnit::kTime) {
out << indent << FormatKV("real_time", run.GetAdjustedRealTime())
<< ",\n";
out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
} else {
assert(run.aggregate_unit == StatisticUnit::kPercentage);
out << indent << FormatKV("real_time", run.real_accumulated_time)
<< ",\n";
out << indent << FormatKV("cpu_time", run.cpu_accumulated_time);
}
out << ",\n"
<< indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
} else if (run.report_big_o) {
out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
<< ",\n";
out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
<< ",\n";
out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
} else if (run.report_rms) {
out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
}
for (auto& c : run.counters) {
out << ",\n" << indent << FormatKV(c.first, c.second);
}
if (run.memory_result) {
const MemoryManager::Result memory_result = *run.memory_result;
out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
out << ",\n"
<< indent << FormatKV("max_bytes_used", memory_result.max_bytes_used);
auto report_if_present = [&out, &indent](const std::string& label,
int64_t val) {
if (val != MemoryManager::TombstoneValue)
out << ",\n" << indent << FormatKV(label, val);
};
report_if_present("total_allocated_bytes",
memory_result.total_allocated_bytes);
report_if_present("net_heap_growth", memory_result.net_heap_growth);
}
if (!run.report_label.empty()) {
out << ",\n" << indent << FormatKV("label", run.report_label);
}
out << '\n';
}
const int64_t MemoryManager::TombstoneValue =
std::numeric_limits<int64_t>::max();
} // end namespace benchmark

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#ifndef BENCHMARK_LOG_H_
#define BENCHMARK_LOG_H_
#include <iostream>
#include <ostream>
// NOTE: this is also defined in benchmark.h but we're trying to avoid a
// dependency.
// The _MSVC_LANG check should detect Visual Studio 2015 Update 3 and newer.
#if __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
#define BENCHMARK_HAS_CXX11
#endif
namespace benchmark {
namespace internal {
typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
class LogType {
friend LogType& GetNullLogInstance();
friend LogType& GetErrorLogInstance();
// FIXME: Add locking to output.
template <class Tp>
friend LogType& operator<<(LogType&, Tp const&);
friend LogType& operator<<(LogType&, EndLType*);
private:
LogType(std::ostream* out) : out_(out) {}
std::ostream* out_;
// NOTE: we could use BENCHMARK_DISALLOW_COPY_AND_ASSIGN but we shouldn't have
// a dependency on benchmark.h from here.
#ifndef BENCHMARK_HAS_CXX11
LogType(const LogType&);
LogType& operator=(const LogType&);
#else
LogType(const LogType&) = delete;
LogType& operator=(const LogType&) = delete;
#endif
};
template <class Tp>
LogType& operator<<(LogType& log, Tp const& value) {
if (log.out_) {
*log.out_ << value;
}
return log;
}
inline LogType& operator<<(LogType& log, EndLType* m) {
if (log.out_) {
*log.out_ << m;
}
return log;
}
inline int& LogLevel() {
static int log_level = 0;
return log_level;
}
inline LogType& GetNullLogInstance() {
static LogType null_log(static_cast<std::ostream*>(nullptr));
return null_log;
}
inline LogType& GetErrorLogInstance() {
static LogType error_log(&std::clog);
return error_log;
}
inline LogType& GetLogInstanceForLevel(int level) {
if (level <= LogLevel()) {
return GetErrorLogInstance();
}
return GetNullLogInstance();
}
} // end namespace internal
} // end namespace benchmark
// clang-format off
#define BM_VLOG(x) \
(::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
" ")
// clang-format on
#endif

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#ifndef BENCHMARK_MUTEX_H_
#define BENCHMARK_MUTEX_H_
#include <condition_variable>
#include <mutex>
#include "check.h"
// Enable thread safety attributes only with clang.
// The attributes can be safely erased when compiling with other compilers.
#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
#define THREAD_ANNOTATION_ATTRIBUTE_(x) __attribute__((x))
#else
#define THREAD_ANNOTATION_ATTRIBUTE_(x) // no-op
#endif
#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(capability(x))
#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE_(scoped_lockable)
#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(guarded_by(x))
#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE_(pt_guarded_by(x))
#define ACQUIRED_BEFORE(...) \
THREAD_ANNOTATION_ATTRIBUTE_(acquired_before(__VA_ARGS__))
#define ACQUIRED_AFTER(...) \
THREAD_ANNOTATION_ATTRIBUTE_(acquired_after(__VA_ARGS__))
#define REQUIRES(...) \
THREAD_ANNOTATION_ATTRIBUTE_(requires_capability(__VA_ARGS__))
#define REQUIRES_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE_(requires_shared_capability(__VA_ARGS__))
#define ACQUIRE(...) \
THREAD_ANNOTATION_ATTRIBUTE_(acquire_capability(__VA_ARGS__))
#define ACQUIRE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE_(acquire_shared_capability(__VA_ARGS__))
#define RELEASE(...) \
THREAD_ANNOTATION_ATTRIBUTE_(release_capability(__VA_ARGS__))
#define RELEASE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE_(release_shared_capability(__VA_ARGS__))
#define TRY_ACQUIRE(...) \
THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_capability(__VA_ARGS__))
#define TRY_ACQUIRE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE_(try_acquire_shared_capability(__VA_ARGS__))
#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE_(locks_excluded(__VA_ARGS__))
#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(assert_capability(x))
#define ASSERT_SHARED_CAPABILITY(x) \
THREAD_ANNOTATION_ATTRIBUTE_(assert_shared_capability(x))
#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE_(lock_returned(x))
#define NO_THREAD_SAFETY_ANALYSIS \
THREAD_ANNOTATION_ATTRIBUTE_(no_thread_safety_analysis)
namespace benchmark {
typedef std::condition_variable Condition;
// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
// we can annotate them with thread safety attributes and use the
// -Wthread-safety warning with clang. The standard library types cannot be
// used directly because they do not provide the required annotations.
class CAPABILITY("mutex") Mutex {
public:
Mutex() {}
void lock() ACQUIRE() { mut_.lock(); }
void unlock() RELEASE() { mut_.unlock(); }
std::mutex& native_handle() { return mut_; }
private:
std::mutex mut_;
};
class SCOPED_CAPABILITY MutexLock {
typedef std::unique_lock<std::mutex> MutexLockImp;
public:
MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
~MutexLock() RELEASE() {}
MutexLockImp& native_handle() { return ml_; }
private:
MutexLockImp ml_;
};
class Barrier {
public:
Barrier(int num_threads) : running_threads_(num_threads) {}
// Called by each thread
bool wait() EXCLUDES(lock_) {
bool last_thread = false;
{
MutexLock ml(lock_);
last_thread = createBarrier(ml);
}
if (last_thread) phase_condition_.notify_all();
return last_thread;
}
void removeThread() EXCLUDES(lock_) {
MutexLock ml(lock_);
--running_threads_;
if (entered_ != 0) phase_condition_.notify_all();
}
private:
Mutex lock_;
Condition phase_condition_;
int running_threads_;
// State for barrier management
int phase_number_ = 0;
int entered_ = 0; // Number of threads that have entered this barrier
// Enter the barrier and wait until all other threads have also
// entered the barrier. Returns iff this is the last thread to
// enter the barrier.
bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
BM_CHECK_LT(entered_, running_threads_);
entered_++;
if (entered_ < running_threads_) {
// Wait for all threads to enter
int phase_number_cp = phase_number_;
auto cb = [this, phase_number_cp]() {
return this->phase_number_ > phase_number_cp ||
entered_ == running_threads_; // A thread has aborted in error
};
phase_condition_.wait(ml.native_handle(), cb);
if (phase_number_ > phase_number_cp) return false;
// else (running_threads_ == entered_) and we are the last thread.
}
// Last thread has reached the barrier
phase_number_++;
entered_ = 0;
return true;
}
};
} // end namespace benchmark
#endif // BENCHMARK_MUTEX_H_

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// Copyright 2021 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "perf_counters.h"
#include <cstring>
#include <memory>
#include <vector>
#if defined HAVE_LIBPFM
#include "perfmon/pfmlib.h"
#include "perfmon/pfmlib_perf_event.h"
#endif
namespace benchmark {
namespace internal {
constexpr size_t PerfCounterValues::kMaxCounters;
#if defined HAVE_LIBPFM
size_t PerfCounterValues::Read(const std::vector<int>& leaders) {
// Create a pointer for multiple reads
const size_t bufsize = values_.size() * sizeof(values_[0]);
char* ptr = reinterpret_cast<char*>(values_.data());
size_t size = bufsize;
for (int lead : leaders) {
auto read_bytes = ::read(lead, ptr, size);
if (read_bytes >= ssize_t(sizeof(uint64_t))) {
// Actual data bytes are all bytes minus initial padding
std::size_t data_bytes =
static_cast<std::size_t>(read_bytes) - sizeof(uint64_t);
// This should be very cheap since it's in hot cache
std::memmove(ptr, ptr + sizeof(uint64_t), data_bytes);
// Increment our counters
ptr += data_bytes;
size -= data_bytes;
} else {
int err = errno;
GetErrorLogInstance() << "Error reading lead " << lead << " errno:" << err
<< " " << ::strerror(err) << "\n";
return 0;
}
}
return (bufsize - size) / sizeof(uint64_t);
}
const bool PerfCounters::kSupported = true;
// Initializes libpfm only on the first call. Returns whether that single
// initialization was successful.
bool PerfCounters::Initialize() {
// Function-scope static gets initialized only once on first call.
static const bool success = []() {
return pfm_initialize() == PFM_SUCCESS;
}();
return success;
}
bool PerfCounters::IsCounterSupported(const std::string& name) {
Initialize();
perf_event_attr_t attr;
std::memset(&attr, 0, sizeof(attr));
pfm_perf_encode_arg_t arg;
std::memset(&arg, 0, sizeof(arg));
arg.attr = &attr;
const int mode = PFM_PLM3; // user mode only
int ret = pfm_get_os_event_encoding(name.c_str(), mode, PFM_OS_PERF_EVENT_EXT,
&arg);
return (ret == PFM_SUCCESS);
}
PerfCounters PerfCounters::Create(
const std::vector<std::string>& counter_names) {
if (!counter_names.empty()) {
Initialize();
}
// Valid counters will populate these arrays but we start empty
std::vector<std::string> valid_names;
std::vector<int> counter_ids;
std::vector<int> leader_ids;
// Resize to the maximum possible
valid_names.reserve(counter_names.size());
counter_ids.reserve(counter_names.size());
const int kCounterMode = PFM_PLM3; // user mode only
// Group leads will be assigned on demand. The idea is that once we cannot
// create a counter descriptor, the reason is that this group has maxed out
// so we set the group_id again to -1 and retry - giving the algorithm a
// chance to create a new group leader to hold the next set of counters.
int group_id = -1;
// Loop through all performance counters
for (size_t i = 0; i < counter_names.size(); ++i) {
// we are about to push into the valid names vector
// check if we did not reach the maximum
if (valid_names.size() == PerfCounterValues::kMaxCounters) {
// Log a message if we maxed out and stop adding
GetErrorLogInstance()
<< counter_names.size() << " counters were requested. The maximum is "
<< PerfCounterValues::kMaxCounters << " and " << valid_names.size()
<< " were already added. All remaining counters will be ignored\n";
// stop the loop and return what we have already
break;
}
// Check if this name is empty
const auto& name = counter_names[i];
if (name.empty()) {
GetErrorLogInstance()
<< "A performance counter name was the empty string\n";
continue;
}
// Here first means first in group, ie the group leader
const bool is_first = (group_id < 0);
// This struct will be populated by libpfm from the counter string
// and then fed into the syscall perf_event_open
struct perf_event_attr attr {};
attr.size = sizeof(attr);
// This is the input struct to libpfm.
pfm_perf_encode_arg_t arg{};
arg.attr = &attr;
const int pfm_get = pfm_get_os_event_encoding(name.c_str(), kCounterMode,
PFM_OS_PERF_EVENT, &arg);
if (pfm_get != PFM_SUCCESS) {
GetErrorLogInstance()
<< "Unknown performance counter name: " << name << "\n";
continue;
}
// We then proceed to populate the remaining fields in our attribute struct
// Note: the man page for perf_event_create suggests inherit = true and
// read_format = PERF_FORMAT_GROUP don't work together, but that's not the
// case.
attr.disabled = is_first;
attr.inherit = true;
attr.pinned = is_first;
attr.exclude_kernel = true;
attr.exclude_user = false;
attr.exclude_hv = true;
// Read all counters in a group in one read.
attr.read_format = PERF_FORMAT_GROUP;
int id = -1;
while (id < 0) {
static constexpr size_t kNrOfSyscallRetries = 5;
// Retry syscall as it was interrupted often (b/64774091).
for (size_t num_retries = 0; num_retries < kNrOfSyscallRetries;
++num_retries) {
id = perf_event_open(&attr, 0, -1, group_id, 0);
if (id >= 0 || errno != EINTR) {
break;
}
}
if (id < 0) {
// If the file descriptor is negative we might have reached a limit
// in the current group. Set the group_id to -1 and retry
if (group_id >= 0) {
// Create a new group
group_id = -1;
} else {
// At this point we have already retried to set a new group id and
// failed. We then give up.
break;
}
}
}
// We failed to get a new file descriptor. We might have reached a hard
// hardware limit that cannot be resolved even with group multiplexing
if (id < 0) {
GetErrorLogInstance() << "***WARNING** Failed to get a file descriptor "
"for performance counter "
<< name << ". Ignoring\n";
// We give up on this counter but try to keep going
// as the others would be fine
continue;
}
if (group_id < 0) {
// This is a leader, store and assign it to the current file descriptor
leader_ids.push_back(id);
group_id = id;
}
// This is a valid counter, add it to our descriptor's list
counter_ids.push_back(id);
valid_names.push_back(name);
}
// Loop through all group leaders activating them
// There is another option of starting ALL counters in a process but
// that would be far reaching an intrusion. If the user is using PMCs
// by themselves then this would have a side effect on them. It is
// friendlier to loop through all groups individually.
for (int lead : leader_ids) {
if (ioctl(lead, PERF_EVENT_IOC_ENABLE) != 0) {
// This should never happen but if it does, we give up on the
// entire batch as recovery would be a mess.
GetErrorLogInstance() << "***WARNING*** Failed to start counters. "
"Claring out all counters.\n";
// Close all peformance counters
for (int id : counter_ids) {
::close(id);
}
// Return an empty object so our internal state is still good and
// the process can continue normally without impact
return NoCounters();
}
}
return PerfCounters(std::move(valid_names), std::move(counter_ids),
std::move(leader_ids));
}
void PerfCounters::CloseCounters() const {
if (counter_ids_.empty()) {
return;
}
for (int lead : leader_ids_) {
ioctl(lead, PERF_EVENT_IOC_DISABLE);
}
for (int fd : counter_ids_) {
close(fd);
}
}
#else // defined HAVE_LIBPFM
size_t PerfCounterValues::Read(const std::vector<int>&) { return 0; }
const bool PerfCounters::kSupported = false;
bool PerfCounters::Initialize() { return false; }
bool PerfCounters::IsCounterSupported(const std::string&) { return false; }
PerfCounters PerfCounters::Create(
const std::vector<std::string>& counter_names) {
if (!counter_names.empty()) {
GetErrorLogInstance() << "Performance counters not supported.\n";
}
return NoCounters();
}
void PerfCounters::CloseCounters() const {}
#endif // defined HAVE_LIBPFM
PerfCountersMeasurement::PerfCountersMeasurement(
const std::vector<std::string>& counter_names)
: start_values_(counter_names.size()), end_values_(counter_names.size()) {
counters_ = PerfCounters::Create(counter_names);
}
PerfCounters& PerfCounters::operator=(PerfCounters&& other) noexcept {
if (this != &other) {
CloseCounters();
counter_ids_ = std::move(other.counter_ids_);
leader_ids_ = std::move(other.leader_ids_);
counter_names_ = std::move(other.counter_names_);
}
return *this;
}
} // namespace internal
} // namespace benchmark

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// Copyright 2021 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef BENCHMARK_PERF_COUNTERS_H
#define BENCHMARK_PERF_COUNTERS_H
#include <array>
#include <cstdint>
#include <cstring>
#include <memory>
#include <vector>
#include "benchmark/benchmark.h"
#include "check.h"
#include "log.h"
#include "mutex.h"
#ifndef BENCHMARK_OS_WINDOWS
#include <unistd.h>
#endif
#if defined(_MSC_VER)
#pragma warning(push)
// C4251: <symbol> needs to have dll-interface to be used by clients of class
#pragma warning(disable : 4251)
#endif
namespace benchmark {
namespace internal {
// Typically, we can only read a small number of counters. There is also a
// padding preceding counter values, when reading multiple counters with one
// syscall (which is desirable). PerfCounterValues abstracts these details.
// The implementation ensures the storage is inlined, and allows 0-based
// indexing into the counter values.
// The object is used in conjunction with a PerfCounters object, by passing it
// to Snapshot(). The Read() method relocates individual reads, discarding
// the initial padding from each group leader in the values buffer such that
// all user accesses through the [] operator are correct.
class BENCHMARK_EXPORT PerfCounterValues {
public:
explicit PerfCounterValues(size_t nr_counters) : nr_counters_(nr_counters) {
BM_CHECK_LE(nr_counters_, kMaxCounters);
}
// We are reading correctly now so the values don't need to skip padding
uint64_t operator[](size_t pos) const { return values_[pos]; }
// Increased the maximum to 32 only since the buffer
// is std::array<> backed
static constexpr size_t kMaxCounters = 32;
private:
friend class PerfCounters;
// Get the byte buffer in which perf counters can be captured.
// This is used by PerfCounters::Read
std::pair<char*, size_t> get_data_buffer() {
return {reinterpret_cast<char*>(values_.data()),
sizeof(uint64_t) * (kPadding + nr_counters_)};
}
// This reading is complex and as the goal of this class is to
// abstract away the intrincacies of the reading process, this is
// a better place for it
size_t Read(const std::vector<int>& leaders);
// Move the padding to 2 due to the reading algorithm (1st padding plus a
// current read padding)
static constexpr size_t kPadding = 2;
std::array<uint64_t, kPadding + kMaxCounters> values_;
const size_t nr_counters_;
};
// Collect PMU counters. The object, once constructed, is ready to be used by
// calling read(). PMU counter collection is enabled from the time create() is
// called, to obtain the object, until the object's destructor is called.
class BENCHMARK_EXPORT PerfCounters final {
public:
// True iff this platform supports performance counters.
static const bool kSupported;
// Returns an empty object
static PerfCounters NoCounters() { return PerfCounters(); }
~PerfCounters() { CloseCounters(); }
PerfCounters() = default;
PerfCounters(PerfCounters&&) = default;
PerfCounters(const PerfCounters&) = delete;
PerfCounters& operator=(PerfCounters&&) noexcept;
PerfCounters& operator=(const PerfCounters&) = delete;
// Platform-specific implementations may choose to do some library
// initialization here.
static bool Initialize();
// Check if the given counter is supported, if the app wants to
// check before passing
static bool IsCounterSupported(const std::string& name);
// Return a PerfCounters object ready to read the counters with the names
// specified. The values are user-mode only. The counter name format is
// implementation and OS specific.
// In case of failure, this method will in the worst case return an
// empty object whose state will still be valid.
static PerfCounters Create(const std::vector<std::string>& counter_names);
// Take a snapshot of the current value of the counters into the provided
// valid PerfCounterValues storage. The values are populated such that:
// names()[i]'s value is (*values)[i]
BENCHMARK_ALWAYS_INLINE bool Snapshot(PerfCounterValues* values) const {
#ifndef BENCHMARK_OS_WINDOWS
assert(values != nullptr);
return values->Read(leader_ids_) == counter_ids_.size();
#else
(void)values;
return false;
#endif
}
const std::vector<std::string>& names() const { return counter_names_; }
size_t num_counters() const { return counter_names_.size(); }
private:
PerfCounters(const std::vector<std::string>& counter_names,
std::vector<int>&& counter_ids, std::vector<int>&& leader_ids)
: counter_ids_(std::move(counter_ids)),
leader_ids_(std::move(leader_ids)),
counter_names_(counter_names) {}
void CloseCounters() const;
std::vector<int> counter_ids_;
std::vector<int> leader_ids_;
std::vector<std::string> counter_names_;
};
// Typical usage of the above primitives.
class BENCHMARK_EXPORT PerfCountersMeasurement final {
public:
PerfCountersMeasurement(const std::vector<std::string>& counter_names);
size_t num_counters() const { return counters_.num_counters(); }
std::vector<std::string> names() const { return counters_.names(); }
BENCHMARK_ALWAYS_INLINE bool Start() {
if (num_counters() == 0) return true;
// Tell the compiler to not move instructions above/below where we take
// the snapshot.
ClobberMemory();
valid_read_ &= counters_.Snapshot(&start_values_);
ClobberMemory();
return valid_read_;
}
BENCHMARK_ALWAYS_INLINE bool Stop(
std::vector<std::pair<std::string, double>>& measurements) {
if (num_counters() == 0) return true;
// Tell the compiler to not move instructions above/below where we take
// the snapshot.
ClobberMemory();
valid_read_ &= counters_.Snapshot(&end_values_);
ClobberMemory();
for (size_t i = 0; i < counters_.names().size(); ++i) {
double measurement = static_cast<double>(end_values_[i]) -
static_cast<double>(start_values_[i]);
measurements.push_back({counters_.names()[i], measurement});
}
return valid_read_;
}
private:
PerfCounters counters_;
bool valid_read_ = true;
PerfCounterValues start_values_;
PerfCounterValues end_values_;
};
} // namespace internal
} // namespace benchmark
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
#endif // BENCHMARK_PERF_COUNTERS_H

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef BENCHMARK_RE_H_
#define BENCHMARK_RE_H_
#include "internal_macros.h"
// clang-format off
#if !defined(HAVE_STD_REGEX) && \
!defined(HAVE_GNU_POSIX_REGEX) && \
!defined(HAVE_POSIX_REGEX)
// No explicit regex selection; detect based on builtin hints.
#if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
#define HAVE_POSIX_REGEX 1
#elif __cplusplus >= 199711L
#define HAVE_STD_REGEX 1
#endif
#endif
// Prefer C regex libraries when compiling w/o exceptions so that we can
// correctly report errors.
#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
defined(HAVE_STD_REGEX) && \
(defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
#undef HAVE_STD_REGEX
#endif
#if defined(HAVE_STD_REGEX)
#include <regex>
#elif defined(HAVE_GNU_POSIX_REGEX)
#include <gnuregex.h>
#elif defined(HAVE_POSIX_REGEX)
#include <regex.h>
#else
#error No regular expression backend was found!
#endif
// clang-format on
#include <string>
#include "check.h"
namespace benchmark {
// A wrapper around the POSIX regular expression API that provides automatic
// cleanup
class Regex {
public:
Regex() : init_(false) {}
~Regex();
// Compile a regular expression matcher from spec. Returns true on success.
//
// On failure (and if error is not nullptr), error is populated with a human
// readable error message if an error occurs.
bool Init(const std::string& spec, std::string* error);
// Returns whether str matches the compiled regular expression.
bool Match(const std::string& str);
private:
bool init_;
// Underlying regular expression object
#if defined(HAVE_STD_REGEX)
std::regex re_;
#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
regex_t re_;
#else
#error No regular expression backend implementation available
#endif
};
#if defined(HAVE_STD_REGEX)
inline bool Regex::Init(const std::string& spec, std::string* error) {
#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
((void)error); // suppress unused warning
#else
try {
#endif
re_ = std::regex(spec, std::regex_constants::extended);
init_ = true;
#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
}
catch (const std::regex_error& e) {
if (error) {
*error = e.what();
}
}
#endif
return init_;
}
inline Regex::~Regex() {}
inline bool Regex::Match(const std::string& str) {
if (!init_) {
return false;
}
return std::regex_search(str, re_);
}
#else
inline bool Regex::Init(const std::string& spec, std::string* error) {
int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
if (error) {
size_t needed = regerror(ec, &re_, nullptr, 0);
char* errbuf = new char[needed];
regerror(ec, &re_, errbuf, needed);
// regerror returns the number of bytes necessary to null terminate
// the string, so we move that when assigning to error.
BM_CHECK_NE(needed, 0);
error->assign(errbuf, needed - 1);
delete[] errbuf;
}
return false;
}
init_ = true;
return true;
}
inline Regex::~Regex() {
if (init_) {
regfree(&re_);
}
}
inline bool Regex::Match(const std::string& str) {
if (!init_) {
return false;
}
return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
}
#endif
} // end namespace benchmark
#endif // BENCHMARK_RE_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cstdlib>
#include <iostream>
#include <map>
#include <string>
#include <tuple>
#include <vector>
#include "benchmark/benchmark.h"
#include "check.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
BenchmarkReporter::BenchmarkReporter()
: output_stream_(&std::cout), error_stream_(&std::cerr) {}
BenchmarkReporter::~BenchmarkReporter() {}
void BenchmarkReporter::PrintBasicContext(std::ostream *out,
Context const &context) {
BM_CHECK(out) << "cannot be null";
auto &Out = *out;
#ifndef BENCHMARK_OS_QURT
// Date/time information is not available on QuRT.
// Attempting to get it via this call cause the binary to crash.
Out << LocalDateTimeString() << "\n";
#endif
if (context.executable_name)
Out << "Running " << context.executable_name << "\n";
const CPUInfo &info = context.cpu_info;
Out << "Run on (" << info.num_cpus << " X "
<< (info.cycles_per_second / 1000000.0) << " MHz CPU "
<< ((info.num_cpus > 1) ? "s" : "") << ")\n";
if (info.caches.size() != 0) {
Out << "CPU Caches:\n";
for (auto &CInfo : info.caches) {
Out << " L" << CInfo.level << " " << CInfo.type << " "
<< (CInfo.size / 1024) << " KiB";
if (CInfo.num_sharing != 0)
Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
Out << "\n";
}
}
if (!info.load_avg.empty()) {
Out << "Load Average: ";
for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
Out << StrFormat("%.2f", *It++);
if (It != info.load_avg.end()) Out << ", ";
}
Out << "\n";
}
std::map<std::string, std::string> *global_context =
internal::GetGlobalContext();
if (global_context != nullptr) {
for (const auto &kv : *global_context) {
Out << kv.first << ": " << kv.second << "\n";
}
}
if (CPUInfo::Scaling::ENABLED == info.scaling) {
Out << "***WARNING*** CPU scaling is enabled, the benchmark "
"real time measurements may be noisy and will incur extra "
"overhead.\n";
}
#ifndef NDEBUG
Out << "***WARNING*** Library was built as DEBUG. Timings may be "
"affected.\n";
#endif
}
// No initializer because it's already initialized to NULL.
const char *BenchmarkReporter::Context::executable_name;
BenchmarkReporter::Context::Context()
: cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
std::string BenchmarkReporter::Run::benchmark_name() const {
std::string name = run_name.str();
if (run_type == RT_Aggregate) {
name += "_" + aggregate_name;
}
return name;
}
double BenchmarkReporter::Run::GetAdjustedRealTime() const {
double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
if (iterations != 0) new_time /= static_cast<double>(iterations);
return new_time;
}
double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
if (iterations != 0) new_time /= static_cast<double>(iterations);
return new_time;
}
} // end namespace benchmark

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
// Copyright 2017 Roman Lebedev. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "statistics.h"
#include <algorithm>
#include <cmath>
#include <numeric>
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
#include "check.h"
namespace benchmark {
auto StatisticsSum = [](const std::vector<double>& v) {
return std::accumulate(v.begin(), v.end(), 0.0);
};
double StatisticsMean(const std::vector<double>& v) {
if (v.empty()) return 0.0;
return StatisticsSum(v) * (1.0 / static_cast<double>(v.size()));
}
double StatisticsMedian(const std::vector<double>& v) {
if (v.size() < 3) return StatisticsMean(v);
std::vector<double> copy(v);
auto center = copy.begin() + v.size() / 2;
std::nth_element(copy.begin(), center, copy.end());
// Did we have an odd number of samples? If yes, then center is the median.
// If not, then we are looking for the average between center and the value
// before. Instead of resorting, we just look for the max value before it,
// which is not necessarily the element immediately preceding `center` Since
// `copy` is only partially sorted by `nth_element`.
if (v.size() % 2 == 1) return *center;
auto center2 = std::max_element(copy.begin(), center);
return (*center + *center2) / 2.0;
}
// Return the sum of the squares of this sample set
auto SumSquares = [](const std::vector<double>& v) {
return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
};
auto Sqr = [](const double dat) { return dat * dat; };
auto Sqrt = [](const double dat) {
// Avoid NaN due to imprecision in the calculations
if (dat < 0.0) return 0.0;
return std::sqrt(dat);
};
double StatisticsStdDev(const std::vector<double>& v) {
const auto mean = StatisticsMean(v);
if (v.empty()) return mean;
// Sample standard deviation is undefined for n = 1
if (v.size() == 1) return 0.0;
const double avg_squares =
SumSquares(v) * (1.0 / static_cast<double>(v.size()));
return Sqrt(static_cast<double>(v.size()) /
(static_cast<double>(v.size()) - 1.0) *
(avg_squares - Sqr(mean)));
}
double StatisticsCV(const std::vector<double>& v) {
if (v.size() < 2) return 0.0;
const auto stddev = StatisticsStdDev(v);
const auto mean = StatisticsMean(v);
if (std::fpclassify(mean) == FP_ZERO) return 0.0;
return stddev / mean;
}
std::vector<BenchmarkReporter::Run> ComputeStats(
const std::vector<BenchmarkReporter::Run>& reports) {
typedef BenchmarkReporter::Run Run;
std::vector<Run> results;
auto error_count = std::count_if(reports.begin(), reports.end(),
[](Run const& run) { return run.skipped; });
if (reports.size() - static_cast<size_t>(error_count) < 2) {
// We don't report aggregated data if there was a single run.
return results;
}
// Accumulators.
std::vector<double> real_accumulated_time_stat;
std::vector<double> cpu_accumulated_time_stat;
real_accumulated_time_stat.reserve(reports.size());
cpu_accumulated_time_stat.reserve(reports.size());
// All repetitions should be run with the same number of iterations so we
// can take this information from the first benchmark.
const IterationCount run_iterations = reports.front().iterations;
// create stats for user counters
struct CounterStat {
Counter c;
std::vector<double> s;
};
std::map<std::string, CounterStat> counter_stats;
for (Run const& r : reports) {
for (auto const& cnt : r.counters) {
auto it = counter_stats.find(cnt.first);
if (it == counter_stats.end()) {
it = counter_stats
.emplace(cnt.first,
CounterStat{cnt.second, std::vector<double>{}})
.first;
it->second.s.reserve(reports.size());
} else {
BM_CHECK_EQ(it->second.c.flags, cnt.second.flags);
}
}
}
// Populate the accumulators.
for (Run const& run : reports) {
BM_CHECK_EQ(reports[0].benchmark_name(), run.benchmark_name());
BM_CHECK_EQ(run_iterations, run.iterations);
if (run.skipped) continue;
real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
// user counters
for (auto const& cnt : run.counters) {
auto it = counter_stats.find(cnt.first);
BM_CHECK_NE(it, counter_stats.end());
it->second.s.emplace_back(cnt.second);
}
}
// Only add label if it is same for all runs
std::string report_label = reports[0].report_label;
for (std::size_t i = 1; i < reports.size(); i++) {
if (reports[i].report_label != report_label) {
report_label = "";
break;
}
}
const double iteration_rescale_factor =
double(reports.size()) / double(run_iterations);
for (const auto& Stat : *reports[0].statistics) {
// Get the data from the accumulator to BenchmarkReporter::Run's.
Run data;
data.run_name = reports[0].run_name;
data.family_index = reports[0].family_index;
data.per_family_instance_index = reports[0].per_family_instance_index;
data.run_type = BenchmarkReporter::Run::RT_Aggregate;
data.threads = reports[0].threads;
data.repetitions = reports[0].repetitions;
data.repetition_index = Run::no_repetition_index;
data.aggregate_name = Stat.name_;
data.aggregate_unit = Stat.unit_;
data.report_label = report_label;
// It is incorrect to say that an aggregate is computed over
// run's iterations, because those iterations already got averaged.
// Similarly, if there are N repetitions with 1 iterations each,
// an aggregate will be computed over N measurements, not 1.
// Thus it is best to simply use the count of separate reports.
data.iterations = static_cast<IterationCount>(reports.size());
data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
if (data.aggregate_unit == StatisticUnit::kTime) {
// We will divide these times by data.iterations when reporting, but the
// data.iterations is not necessarily the scale of these measurements,
// because in each repetition, these timers are sum over all the iters.
// And if we want to say that the stats are over N repetitions and not
// M iterations, we need to multiply these by (N/M).
data.real_accumulated_time *= iteration_rescale_factor;
data.cpu_accumulated_time *= iteration_rescale_factor;
}
data.time_unit = reports[0].time_unit;
// user counters
for (auto const& kv : counter_stats) {
// Do *NOT* rescale the custom counters. They are already properly scaled.
const auto uc_stat = Stat.compute_(kv.second.s);
auto c = Counter(uc_stat, counter_stats[kv.first].c.flags,
counter_stats[kv.first].c.oneK);
data.counters[kv.first] = c;
}
results.push_back(data);
}
return results;
}
} // end namespace benchmark

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
// Copyright 2017 Roman Lebedev. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STATISTICS_H_
#define STATISTICS_H_
#include <vector>
#include "benchmark/benchmark.h"
namespace benchmark {
// Return a vector containing the mean, median and standard deviation
// information (and any user-specified info) for the specified list of reports.
// If 'reports' contains less than two non-errored runs an empty vector is
// returned
BENCHMARK_EXPORT
std::vector<BenchmarkReporter::Run> ComputeStats(
const std::vector<BenchmarkReporter::Run>& reports);
BENCHMARK_EXPORT
double StatisticsMean(const std::vector<double>& v);
BENCHMARK_EXPORT
double StatisticsMedian(const std::vector<double>& v);
BENCHMARK_EXPORT
double StatisticsStdDev(const std::vector<double>& v);
BENCHMARK_EXPORT
double StatisticsCV(const std::vector<double>& v);
} // end namespace benchmark
#endif // STATISTICS_H_

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#include "string_util.h"
#include <array>
#ifdef BENCHMARK_STL_ANDROID_GNUSTL
#include <cerrno>
#endif
#include <cmath>
#include <cstdarg>
#include <cstdio>
#include <memory>
#include <sstream>
#include "arraysize.h"
#include "benchmark/benchmark.h"
namespace benchmark {
namespace {
// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
const char* const kBigSIUnits[] = {"k", "M", "G", "T", "P", "E", "Z", "Y"};
// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
const char* const kBigIECUnits[] = {"Ki", "Mi", "Gi", "Ti",
"Pi", "Ei", "Zi", "Yi"};
// milli, micro, nano, pico, femto, atto, zepto, yocto.
const char* const kSmallSIUnits[] = {"m", "u", "n", "p", "f", "a", "z", "y"};
// We require that all three arrays have the same size.
static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
"SI and IEC unit arrays must be the same size");
static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
"Small SI and Big SI unit arrays must be the same size");
static const int64_t kUnitsSize = arraysize(kBigSIUnits);
void ToExponentAndMantissa(double val, int precision, double one_k,
std::string* mantissa, int64_t* exponent) {
std::stringstream mantissa_stream;
if (val < 0) {
mantissa_stream << "-";
val = -val;
}
// Adjust threshold so that it never excludes things which can't be rendered
// in 'precision' digits.
const double adjusted_threshold =
std::max(1.0, 1.0 / std::pow(10.0, precision));
const double big_threshold = (adjusted_threshold * one_k) - 1;
const double small_threshold = adjusted_threshold;
// Values in ]simple_threshold,small_threshold[ will be printed as-is
const double simple_threshold = 0.01;
if (val > big_threshold) {
// Positive powers
double scaled = val;
for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
scaled /= one_k;
if (scaled <= big_threshold) {
mantissa_stream << scaled;
*exponent = static_cast<int64_t>(i + 1);
*mantissa = mantissa_stream.str();
return;
}
}
mantissa_stream << val;
*exponent = 0;
} else if (val < small_threshold) {
// Negative powers
if (val < simple_threshold) {
double scaled = val;
for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
scaled *= one_k;
if (scaled >= small_threshold) {
mantissa_stream << scaled;
*exponent = -static_cast<int64_t>(i + 1);
*mantissa = mantissa_stream.str();
return;
}
}
}
mantissa_stream << val;
*exponent = 0;
} else {
mantissa_stream << val;
*exponent = 0;
}
*mantissa = mantissa_stream.str();
}
std::string ExponentToPrefix(int64_t exponent, bool iec) {
if (exponent == 0) return "";
const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
if (index >= kUnitsSize) return "";
const char* const* array =
(exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
return std::string(array[index]);
}
std::string ToBinaryStringFullySpecified(double value, int precision,
Counter::OneK one_k) {
std::string mantissa;
int64_t exponent;
ToExponentAndMantissa(value, precision,
one_k == Counter::kIs1024 ? 1024.0 : 1000.0, &mantissa,
&exponent);
return mantissa + ExponentToPrefix(exponent, one_k == Counter::kIs1024);
}
std::string StrFormatImp(const char* msg, va_list args) {
// we might need a second shot at this, so pre-emptivly make a copy
va_list args_cp;
va_copy(args_cp, args);
// TODO(ericwf): use std::array for first attempt to avoid one memory
// allocation guess what the size might be
std::array<char, 256> local_buff;
// 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
// in the android-ndk
auto ret = vsnprintf(local_buff.data(), local_buff.size(), msg, args_cp);
va_end(args_cp);
// handle empty expansion
if (ret == 0) return std::string{};
if (static_cast<std::size_t>(ret) < local_buff.size())
return std::string(local_buff.data());
// we did not provide a long enough buffer on our first attempt.
// add 1 to size to account for null-byte in size cast to prevent overflow
std::size_t size = static_cast<std::size_t>(ret) + 1;
auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
// 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
// in the android-ndk
vsnprintf(buff_ptr.get(), size, msg, args);
return std::string(buff_ptr.get());
}
} // end namespace
std::string HumanReadableNumber(double n, Counter::OneK one_k) {
return ToBinaryStringFullySpecified(n, 1, one_k);
}
std::string StrFormat(const char* format, ...) {
va_list args;
va_start(args, format);
std::string tmp = StrFormatImp(format, args);
va_end(args);
return tmp;
}
std::vector<std::string> StrSplit(const std::string& str, char delim) {
if (str.empty()) return {};
std::vector<std::string> ret;
size_t first = 0;
size_t next = str.find(delim);
for (; next != std::string::npos;
first = next + 1, next = str.find(delim, first)) {
ret.push_back(str.substr(first, next - first));
}
ret.push_back(str.substr(first));
return ret;
}
#ifdef BENCHMARK_STL_ANDROID_GNUSTL
/*
* GNU STL in Android NDK lacks support for some C++11 functions, including
* stoul, stoi, stod. We reimplement them here using C functions strtoul,
* strtol, strtod. Note that reimplemented functions are in benchmark::
* namespace, not std:: namespace.
*/
unsigned long stoul(const std::string& str, size_t* pos, int base) {
/* Record previous errno */
const int oldErrno = errno;
errno = 0;
const char* strStart = str.c_str();
char* strEnd = const_cast<char*>(strStart);
const unsigned long result = strtoul(strStart, &strEnd, base);
const int strtoulErrno = errno;
/* Restore previous errno */
errno = oldErrno;
/* Check for errors and return */
if (strtoulErrno == ERANGE) {
throw std::out_of_range("stoul failed: " + str +
" is outside of range of unsigned long");
} else if (strEnd == strStart || strtoulErrno != 0) {
throw std::invalid_argument("stoul failed: " + str + " is not an integer");
}
if (pos != nullptr) {
*pos = static_cast<size_t>(strEnd - strStart);
}
return result;
}
int stoi(const std::string& str, size_t* pos, int base) {
/* Record previous errno */
const int oldErrno = errno;
errno = 0;
const char* strStart = str.c_str();
char* strEnd = const_cast<char*>(strStart);
const long result = strtol(strStart, &strEnd, base);
const int strtolErrno = errno;
/* Restore previous errno */
errno = oldErrno;
/* Check for errors and return */
if (strtolErrno == ERANGE || long(int(result)) != result) {
throw std::out_of_range("stoul failed: " + str +
" is outside of range of int");
} else if (strEnd == strStart || strtolErrno != 0) {
throw std::invalid_argument("stoul failed: " + str + " is not an integer");
}
if (pos != nullptr) {
*pos = static_cast<size_t>(strEnd - strStart);
}
return int(result);
}
double stod(const std::string& str, size_t* pos) {
/* Record previous errno */
const int oldErrno = errno;
errno = 0;
const char* strStart = str.c_str();
char* strEnd = const_cast<char*>(strStart);
const double result = strtod(strStart, &strEnd);
/* Restore previous errno */
const int strtodErrno = errno;
errno = oldErrno;
/* Check for errors and return */
if (strtodErrno == ERANGE) {
throw std::out_of_range("stoul failed: " + str +
" is outside of range of int");
} else if (strEnd == strStart || strtodErrno != 0) {
throw std::invalid_argument("stoul failed: " + str + " is not an integer");
}
if (pos != nullptr) {
*pos = static_cast<size_t>(strEnd - strStart);
}
return result;
}
#endif
} // end namespace benchmark

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#ifndef BENCHMARK_STRING_UTIL_H_
#define BENCHMARK_STRING_UTIL_H_
#include <sstream>
#include <string>
#include <utility>
#include <vector>
#include "benchmark/benchmark.h"
#include "benchmark/export.h"
#include "check.h"
#include "internal_macros.h"
namespace benchmark {
BENCHMARK_EXPORT
std::string HumanReadableNumber(double n, Counter::OneK one_k);
BENCHMARK_EXPORT
#if defined(__MINGW32__)
__attribute__((format(__MINGW_PRINTF_FORMAT, 1, 2)))
#elif defined(__GNUC__)
__attribute__((format(printf, 1, 2)))
#endif
std::string
StrFormat(const char* format, ...);
inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
return out;
}
template <class First, class... Rest>
inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
out << std::forward<First>(f);
return StrCatImp(out, std::forward<Rest>(rest)...);
}
template <class... Args>
inline std::string StrCat(Args&&... args) {
std::ostringstream ss;
StrCatImp(ss, std::forward<Args>(args)...);
return ss.str();
}
BENCHMARK_EXPORT
std::vector<std::string> StrSplit(const std::string& str, char delim);
// Disable lint checking for this block since it re-implements C functions.
// NOLINTBEGIN
#ifdef BENCHMARK_STL_ANDROID_GNUSTL
/*
* GNU STL in Android NDK lacks support for some C++11 functions, including
* stoul, stoi, stod. We reimplement them here using C functions strtoul,
* strtol, strtod. Note that reimplemented functions are in benchmark::
* namespace, not std:: namespace.
*/
unsigned long stoul(const std::string& str, size_t* pos = nullptr,
int base = 10);
int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
double stod(const std::string& str, size_t* pos = nullptr);
#else
using std::stod; // NOLINT(misc-unused-using-decls)
using std::stoi; // NOLINT(misc-unused-using-decls)
using std::stoul; // NOLINT(misc-unused-using-decls)
#endif
// NOLINTEND
} // end namespace benchmark
#endif // BENCHMARK_STRING_UTIL_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#if !defined(WINVER) || WINVER < 0x0600
#undef WINVER
#define WINVER 0x0600
#endif // WINVER handling
#include <shlwapi.h>
#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
#include <versionhelpers.h>
#include <windows.h>
#include <codecvt>
#else
#include <fcntl.h>
#if !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <sys/types.h> // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
#include <unistd.h>
#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD || \
defined BENCHMARK_OS_DRAGONFLY
#define BENCHMARK_HAS_SYSCTL
#include <sys/sysctl.h>
#endif
#endif
#if defined(BENCHMARK_OS_SOLARIS)
#include <kstat.h>
#include <netdb.h>
#endif
#if defined(BENCHMARK_OS_QNX)
#include <sys/syspage.h>
#endif
#if defined(BENCHMARK_OS_QURT)
#include <qurt.h>
#endif
#if defined(BENCHMARK_HAS_PTHREAD_AFFINITY)
#include <pthread.h>
#endif
#include <algorithm>
#include <array>
#include <bitset>
#include <cerrno>
#include <climits>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <iterator>
#include <limits>
#include <locale>
#include <memory>
#include <random>
#include <sstream>
#include <utility>
#include "benchmark/benchmark.h"
#include "check.h"
#include "cycleclock.h"
#include "internal_macros.h"
#include "log.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
namespace {
void PrintImp(std::ostream& out) { out << std::endl; }
template <class First, class... Rest>
void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
out << std::forward<First>(f);
PrintImp(out, std::forward<Rest>(rest)...);
}
template <class... Args>
BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
PrintImp(std::cerr, std::forward<Args>(args)...);
std::exit(EXIT_FAILURE);
}
#ifdef BENCHMARK_HAS_SYSCTL
/// ValueUnion - A type used to correctly alias the byte-for-byte output of
/// `sysctl` with the result type it's to be interpreted as.
struct ValueUnion {
union DataT {
int32_t int32_value;
int64_t int64_value;
// For correct aliasing of union members from bytes.
char bytes[8];
};
using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
// The size of the data union member + its trailing array size.
std::size_t size;
DataPtr buff;
public:
ValueUnion() : size(0), buff(nullptr, &std::free) {}
explicit ValueUnion(std::size_t buff_size)
: size(sizeof(DataT) + buff_size),
buff(::new (std::malloc(size)) DataT(), &std::free) {}
ValueUnion(ValueUnion&& other) = default;
explicit operator bool() const { return bool(buff); }
char* data() const { return buff->bytes; }
std::string GetAsString() const { return std::string(data()); }
int64_t GetAsInteger() const {
if (size == sizeof(buff->int32_value))
return buff->int32_value;
else if (size == sizeof(buff->int64_value))
return buff->int64_value;
BENCHMARK_UNREACHABLE();
}
template <class T, int N>
std::array<T, N> GetAsArray() {
const int arr_size = sizeof(T) * N;
BM_CHECK_LE(arr_size, size);
std::array<T, N> arr;
std::memcpy(arr.data(), data(), arr_size);
return arr;
}
};
ValueUnion GetSysctlImp(std::string const& name) {
#if defined BENCHMARK_OS_OPENBSD
int mib[2];
mib[0] = CTL_HW;
if ((name == "hw.ncpu") || (name == "hw.cpuspeed")) {
ValueUnion buff(sizeof(int));
if (name == "hw.ncpu") {
mib[1] = HW_NCPU;
} else {
mib[1] = HW_CPUSPEED;
}
if (sysctl(mib, 2, buff.data(), &buff.size, nullptr, 0) == -1) {
return ValueUnion();
}
return buff;
}
return ValueUnion();
#else
std::size_t cur_buff_size = 0;
if (sysctlbyname(name.c_str(), nullptr, &cur_buff_size, nullptr, 0) == -1)
return ValueUnion();
ValueUnion buff(cur_buff_size);
if (sysctlbyname(name.c_str(), buff.data(), &buff.size, nullptr, 0) == 0)
return buff;
return ValueUnion();
#endif
}
BENCHMARK_MAYBE_UNUSED
bool GetSysctl(std::string const& name, std::string* out) {
out->clear();
auto buff = GetSysctlImp(name);
if (!buff) return false;
out->assign(buff.data());
return true;
}
template <class Tp,
class = typename std::enable_if<std::is_integral<Tp>::value>::type>
bool GetSysctl(std::string const& name, Tp* out) {
*out = 0;
auto buff = GetSysctlImp(name);
if (!buff) return false;
*out = static_cast<Tp>(buff.GetAsInteger());
return true;
}
template <class Tp, size_t N>
bool GetSysctl(std::string const& name, std::array<Tp, N>* out) {
auto buff = GetSysctlImp(name);
if (!buff) return false;
*out = buff.GetAsArray<Tp, N>();
return true;
}
#endif
template <class ArgT>
bool ReadFromFile(std::string const& fname, ArgT* arg) {
*arg = ArgT();
std::ifstream f(fname.c_str());
if (!f.is_open()) return false;
f >> *arg;
return f.good();
}
CPUInfo::Scaling CpuScaling(int num_cpus) {
// We don't have a valid CPU count, so don't even bother.
if (num_cpus <= 0) return CPUInfo::Scaling::UNKNOWN;
#if defined(BENCHMARK_OS_QNX)
return CPUInfo::Scaling::UNKNOWN;
#elif !defined(BENCHMARK_OS_WINDOWS)
// On Linux, the CPUfreq subsystem exposes CPU information as files on the
// local file system. If reading the exported files fails, then we may not be
// running on Linux, so we silently ignore all the read errors.
std::string res;
for (int cpu = 0; cpu < num_cpus; ++cpu) {
std::string governor_file =
StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
if (ReadFromFile(governor_file, &res) && res != "performance")
return CPUInfo::Scaling::ENABLED;
}
return CPUInfo::Scaling::DISABLED;
#else
return CPUInfo::Scaling::UNKNOWN;
#endif
}
int CountSetBitsInCPUMap(std::string val) {
auto CountBits = [](std::string part) {
using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
part = "0x" + part;
CPUMask mask(benchmark::stoul(part, nullptr, 16));
return static_cast<int>(mask.count());
};
std::size_t pos;
int total = 0;
while ((pos = val.find(',')) != std::string::npos) {
total += CountBits(val.substr(0, pos));
val = val.substr(pos + 1);
}
if (!val.empty()) {
total += CountBits(val);
}
return total;
}
BENCHMARK_MAYBE_UNUSED
std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
std::vector<CPUInfo::CacheInfo> res;
std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
int idx = 0;
while (true) {
CPUInfo::CacheInfo info;
std::string fpath = StrCat(dir, "index", idx++, "/");
std::ifstream f(StrCat(fpath, "size").c_str());
if (!f.is_open()) break;
std::string suffix;
f >> info.size;
if (f.fail())
PrintErrorAndDie("Failed while reading file '", fpath, "size'");
if (f.good()) {
f >> suffix;
if (f.bad())
PrintErrorAndDie(
"Invalid cache size format: failed to read size suffix");
else if (f && suffix != "K")
PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
else if (suffix == "K")
info.size *= 1024;
}
if (!ReadFromFile(StrCat(fpath, "type"), &info.type))
PrintErrorAndDie("Failed to read from file ", fpath, "type");
if (!ReadFromFile(StrCat(fpath, "level"), &info.level))
PrintErrorAndDie("Failed to read from file ", fpath, "level");
std::string map_str;
if (!ReadFromFile(StrCat(fpath, "shared_cpu_map"), &map_str))
PrintErrorAndDie("Failed to read from file ", fpath, "shared_cpu_map");
info.num_sharing = CountSetBitsInCPUMap(map_str);
res.push_back(info);
}
return res;
}
#ifdef BENCHMARK_OS_MACOSX
std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
std::vector<CPUInfo::CacheInfo> res;
std::array<int, 4> cache_counts{{0, 0, 0, 0}};
GetSysctl("hw.cacheconfig", &cache_counts);
struct {
std::string name;
std::string type;
int level;
int num_sharing;
} cases[] = {{"hw.l1dcachesize", "Data", 1, cache_counts[1]},
{"hw.l1icachesize", "Instruction", 1, cache_counts[1]},
{"hw.l2cachesize", "Unified", 2, cache_counts[2]},
{"hw.l3cachesize", "Unified", 3, cache_counts[3]}};
for (auto& c : cases) {
int val;
if (!GetSysctl(c.name, &val)) continue;
CPUInfo::CacheInfo info;
info.type = c.type;
info.level = c.level;
info.size = val;
info.num_sharing = c.num_sharing;
res.push_back(std::move(info));
}
return res;
}
#elif defined(BENCHMARK_OS_WINDOWS)
std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
std::vector<CPUInfo::CacheInfo> res;
DWORD buffer_size = 0;
using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
using CInfo = CACHE_DESCRIPTOR;
using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
GetLogicalProcessorInformation(nullptr, &buffer_size);
UPtr buff(static_cast<PInfo*>(std::malloc(buffer_size)), &std::free);
if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
GetLastError());
PInfo* it = buff.get();
PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
for (; it != end; ++it) {
if (it->Relationship != RelationCache) continue;
using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
BitSet b(it->ProcessorMask);
// To prevent duplicates, only consider caches where CPU 0 is specified
if (!b.test(0)) continue;
const CInfo& cache = it->Cache;
CPUInfo::CacheInfo C;
C.num_sharing = static_cast<int>(b.count());
C.level = cache.Level;
C.size = static_cast<int>(cache.Size);
C.type = "Unknown";
switch (cache.Type) {
case CacheUnified:
C.type = "Unified";
break;
case CacheInstruction:
C.type = "Instruction";
break;
case CacheData:
C.type = "Data";
break;
case CacheTrace:
C.type = "Trace";
break;
}
res.push_back(C);
}
return res;
}
#elif BENCHMARK_OS_QNX
std::vector<CPUInfo::CacheInfo> GetCacheSizesQNX() {
std::vector<CPUInfo::CacheInfo> res;
struct cacheattr_entry* cache = SYSPAGE_ENTRY(cacheattr);
uint32_t const elsize = SYSPAGE_ELEMENT_SIZE(cacheattr);
int num = SYSPAGE_ENTRY_SIZE(cacheattr) / elsize;
for (int i = 0; i < num; ++i) {
CPUInfo::CacheInfo info;
switch (cache->flags) {
case CACHE_FLAG_INSTR:
info.type = "Instruction";
info.level = 1;
break;
case CACHE_FLAG_DATA:
info.type = "Data";
info.level = 1;
break;
case CACHE_FLAG_UNIFIED:
info.type = "Unified";
info.level = 2;
break;
case CACHE_FLAG_SHARED:
info.type = "Shared";
info.level = 3;
break;
default:
continue;
break;
}
info.size = cache->line_size * cache->num_lines;
info.num_sharing = 0;
res.push_back(std::move(info));
cache = SYSPAGE_ARRAY_ADJ_OFFSET(cacheattr, cache, elsize);
}
return res;
}
#endif
std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
#ifdef BENCHMARK_OS_MACOSX
return GetCacheSizesMacOSX();
#elif defined(BENCHMARK_OS_WINDOWS)
return GetCacheSizesWindows();
#elif defined(BENCHMARK_OS_QNX)
return GetCacheSizesQNX();
#elif defined(BENCHMARK_OS_QURT)
return std::vector<CPUInfo::CacheInfo>();
#else
return GetCacheSizesFromKVFS();
#endif
}
std::string GetSystemName() {
#if defined(BENCHMARK_OS_WINDOWS)
std::string str;
static constexpr int COUNT = MAX_COMPUTERNAME_LENGTH + 1;
TCHAR hostname[COUNT] = {'\0'};
DWORD DWCOUNT = COUNT;
if (!GetComputerName(hostname, &DWCOUNT)) return std::string("");
#ifndef UNICODE
str = std::string(hostname, DWCOUNT);
#else
// `WideCharToMultiByte` returns `0` when conversion fails.
int len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, hostname,
DWCOUNT, NULL, 0, NULL, NULL);
str.resize(len);
WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, hostname, DWCOUNT, &str[0],
str.size(), NULL, NULL);
#endif
return str;
#elif defined(BENCHMARK_OS_QURT)
std::string str = "Hexagon DSP";
qurt_arch_version_t arch_version_struct;
if (qurt_sysenv_get_arch_version(&arch_version_struct) == QURT_EOK) {
str += " v";
str += std::to_string(arch_version_struct.arch_version);
}
return str;
#else
#ifndef HOST_NAME_MAX
#ifdef BENCHMARK_HAS_SYSCTL // BSD/Mac doesn't have HOST_NAME_MAX defined
#define HOST_NAME_MAX 64
#elif defined(BENCHMARK_OS_NACL)
#define HOST_NAME_MAX 64
#elif defined(BENCHMARK_OS_QNX)
#define HOST_NAME_MAX 154
#elif defined(BENCHMARK_OS_RTEMS)
#define HOST_NAME_MAX 256
#elif defined(BENCHMARK_OS_SOLARIS)
#define HOST_NAME_MAX MAXHOSTNAMELEN
#elif defined(BENCHMARK_OS_ZOS)
#define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
#else
#pragma message("HOST_NAME_MAX not defined. using 64")
#define HOST_NAME_MAX 64
#endif
#endif // def HOST_NAME_MAX
char hostname[HOST_NAME_MAX];
int retVal = gethostname(hostname, HOST_NAME_MAX);
if (retVal != 0) return std::string("");
return std::string(hostname);
#endif // Catch-all POSIX block.
}
int GetNumCPUsImpl() {
#ifdef BENCHMARK_HAS_SYSCTL
int num_cpu = -1;
if (GetSysctl("hw.ncpu", &num_cpu)) return num_cpu;
PrintErrorAndDie("Err: ", strerror(errno));
#elif defined(BENCHMARK_OS_WINDOWS)
SYSTEM_INFO sysinfo;
// Use memset as opposed to = {} to avoid GCC missing initializer false
// positives.
std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
GetSystemInfo(&sysinfo);
// number of logical processors in the current group
return static_cast<int>(sysinfo.dwNumberOfProcessors);
#elif defined(BENCHMARK_OS_SOLARIS)
// Returns -1 in case of a failure.
long num_cpu = sysconf(_SC_NPROCESSORS_ONLN);
if (num_cpu < 0) {
PrintErrorAndDie("sysconf(_SC_NPROCESSORS_ONLN) failed with error: ",
strerror(errno));
}
return (int)num_cpu;
#elif defined(BENCHMARK_OS_QNX)
return static_cast<int>(_syspage_ptr->num_cpu);
#elif defined(BENCHMARK_OS_QURT)
qurt_sysenv_max_hthreads_t hardware_threads;
if (qurt_sysenv_get_max_hw_threads(&hardware_threads) != QURT_EOK) {
hardware_threads.max_hthreads = 1;
}
return hardware_threads.max_hthreads;
#else
int num_cpus = 0;
int max_id = -1;
std::ifstream f("/proc/cpuinfo");
if (!f.is_open()) {
PrintErrorAndDie("Failed to open /proc/cpuinfo");
}
#if defined(__alpha__)
const std::string Key = "cpus detected";
#else
const std::string Key = "processor";
#endif
std::string ln;
while (std::getline(f, ln)) {
if (ln.empty()) continue;
std::size_t split_idx = ln.find(':');
std::string value;
#if defined(__s390__)
// s390 has another format in /proc/cpuinfo
// it needs to be parsed differently
if (split_idx != std::string::npos)
value = ln.substr(Key.size() + 1, split_idx - Key.size() - 1);
#else
if (split_idx != std::string::npos) value = ln.substr(split_idx + 1);
#endif
if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
num_cpus++;
if (!value.empty()) {
const int cur_id = benchmark::stoi(value);
max_id = std::max(cur_id, max_id);
}
}
}
if (f.bad()) {
PrintErrorAndDie("Failure reading /proc/cpuinfo");
}
if (!f.eof()) {
PrintErrorAndDie("Failed to read to end of /proc/cpuinfo");
}
f.close();
if ((max_id + 1) != num_cpus) {
fprintf(stderr,
"CPU ID assignments in /proc/cpuinfo seem messed up."
" This is usually caused by a bad BIOS.\n");
}
return num_cpus;
#endif
BENCHMARK_UNREACHABLE();
}
int GetNumCPUs() {
const int num_cpus = GetNumCPUsImpl();
if (num_cpus < 1) {
PrintErrorAndDie(
"Unable to extract number of CPUs. If your platform uses "
"/proc/cpuinfo, custom support may need to be added.");
}
return num_cpus;
}
class ThreadAffinityGuard final {
public:
ThreadAffinityGuard() : reset_affinity(SetAffinity()) {
if (!reset_affinity)
std::cerr << "***WARNING*** Failed to set thread affinity. Estimated CPU "
"frequency may be incorrect."
<< std::endl;
}
~ThreadAffinityGuard() {
if (!reset_affinity) return;
#if defined(BENCHMARK_HAS_PTHREAD_AFFINITY)
int ret = pthread_setaffinity_np(self, sizeof(previous_affinity),
&previous_affinity);
if (ret == 0) return;
#elif defined(BENCHMARK_OS_WINDOWS_WIN32)
DWORD_PTR ret = SetThreadAffinityMask(self, previous_affinity);
if (ret != 0) return;
#endif // def BENCHMARK_HAS_PTHREAD_AFFINITY
PrintErrorAndDie("Failed to reset thread affinity");
}
ThreadAffinityGuard(ThreadAffinityGuard&&) = delete;
ThreadAffinityGuard(const ThreadAffinityGuard&) = delete;
ThreadAffinityGuard& operator=(ThreadAffinityGuard&&) = delete;
ThreadAffinityGuard& operator=(const ThreadAffinityGuard&) = delete;
private:
bool SetAffinity() {
#if defined(BENCHMARK_HAS_PTHREAD_AFFINITY)
int ret;
self = pthread_self();
ret = pthread_getaffinity_np(self, sizeof(previous_affinity),
&previous_affinity);
if (ret != 0) return false;
cpu_set_t affinity;
memcpy(&affinity, &previous_affinity, sizeof(affinity));
bool is_first_cpu = true;
for (int i = 0; i < CPU_SETSIZE; ++i)
if (CPU_ISSET(i, &affinity)) {
if (is_first_cpu)
is_first_cpu = false;
else
CPU_CLR(i, &affinity);
}
if (is_first_cpu) return false;
ret = pthread_setaffinity_np(self, sizeof(affinity), &affinity);
return ret == 0;
#elif defined(BENCHMARK_OS_WINDOWS_WIN32)
self = GetCurrentThread();
DWORD_PTR mask = static_cast<DWORD_PTR>(1) << GetCurrentProcessorNumber();
previous_affinity = SetThreadAffinityMask(self, mask);
return previous_affinity != 0;
#else
return false;
#endif // def BENCHMARK_HAS_PTHREAD_AFFINITY
}
#if defined(BENCHMARK_HAS_PTHREAD_AFFINITY)
pthread_t self;
cpu_set_t previous_affinity;
#elif defined(BENCHMARK_OS_WINDOWS_WIN32)
HANDLE self;
DWORD_PTR previous_affinity;
#endif // def BENCHMARK_HAS_PTHREAD_AFFINITY
bool reset_affinity;
};
double GetCPUCyclesPerSecond(CPUInfo::Scaling scaling) {
// Currently, scaling is only used on linux path here,
// suppress diagnostics about it being unused on other paths.
(void)scaling;
#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
long freq;
// If the kernel is exporting the tsc frequency use that. There are issues
// where cpuinfo_max_freq cannot be relied on because the BIOS may be
// exporintg an invalid p-state (on x86) or p-states may be used to put the
// processor in a new mode (turbo mode). Essentially, those frequencies
// cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
// well.
if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
// If CPU scaling is disabled, use the *current* frequency.
// Note that we specifically don't want to read cpuinfo_cur_freq,
// because it is only readable by root.
|| (scaling == CPUInfo::Scaling::DISABLED &&
ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
&freq))
// Otherwise, if CPU scaling may be in effect, we want to use
// the *maximum* frequency, not whatever CPU speed some random processor
// happens to be using now.
|| ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
&freq)) {
// The value is in kHz (as the file name suggests). For example, on a
// 2GHz warpstation, the file contains the value "2000000".
return static_cast<double>(freq) * 1000.0;
}
const double error_value = -1;
double bogo_clock = error_value;
std::ifstream f("/proc/cpuinfo");
if (!f.is_open()) {
std::cerr << "failed to open /proc/cpuinfo\n";
return error_value;
}
auto StartsWithKey = [](std::string const& Value, std::string const& Key) {
if (Key.size() > Value.size()) return false;
auto Cmp = [&](char X, char Y) {
return std::tolower(X) == std::tolower(Y);
};
return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
};
std::string ln;
while (std::getline(f, ln)) {
if (ln.empty()) continue;
std::size_t split_idx = ln.find(':');
std::string value;
if (split_idx != std::string::npos) value = ln.substr(split_idx + 1);
// When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
// accept positive values. Some environments (virtual machines) report zero,
// which would cause infinite looping in WallTime_Init.
if (StartsWithKey(ln, "cpu MHz")) {
if (!value.empty()) {
double cycles_per_second = benchmark::stod(value) * 1000000.0;
if (cycles_per_second > 0) return cycles_per_second;
}
} else if (StartsWithKey(ln, "bogomips")) {
if (!value.empty()) {
bogo_clock = benchmark::stod(value) * 1000000.0;
if (bogo_clock < 0.0) bogo_clock = error_value;
}
}
}
if (f.bad()) {
std::cerr << "Failure reading /proc/cpuinfo\n";
return error_value;
}
if (!f.eof()) {
std::cerr << "Failed to read to end of /proc/cpuinfo\n";
return error_value;
}
f.close();
// If we found the bogomips clock, but nothing better, we'll use it (but
// we're not happy about it); otherwise, fallback to the rough estimation
// below.
if (bogo_clock >= 0.0) return bogo_clock;
#elif defined BENCHMARK_HAS_SYSCTL
constexpr auto* freqStr =
#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
"machdep.tsc_freq";
#elif defined BENCHMARK_OS_OPENBSD
"hw.cpuspeed";
#elif defined BENCHMARK_OS_DRAGONFLY
"hw.tsc_frequency";
#else
"hw.cpufrequency";
#endif
unsigned long long hz = 0;
#if defined BENCHMARK_OS_OPENBSD
if (GetSysctl(freqStr, &hz)) return static_cast<double>(hz * 1000000);
#else
if (GetSysctl(freqStr, &hz)) return static_cast<double>(hz);
#endif
fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
freqStr, strerror(errno));
fprintf(stderr,
"This does not affect benchmark measurements, only the "
"metadata output.\n");
#elif defined BENCHMARK_OS_WINDOWS_WIN32
// In NT, read MHz from the registry. If we fail to do so or we're in win9x
// then make a crude estimate.
DWORD data, data_size = sizeof(data);
if (IsWindowsXPOrGreater() &&
SUCCEEDED(
SHGetValueA(HKEY_LOCAL_MACHINE,
"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
"~MHz", nullptr, &data, &data_size)))
return static_cast<double>(static_cast<int64_t>(data) *
static_cast<int64_t>(1000 * 1000)); // was mhz
#elif defined(BENCHMARK_OS_SOLARIS)
kstat_ctl_t* kc = kstat_open();
if (!kc) {
std::cerr << "failed to open /dev/kstat\n";
return -1;
}
kstat_t* ksp = kstat_lookup(kc, const_cast<char*>("cpu_info"), -1,
const_cast<char*>("cpu_info0"));
if (!ksp) {
std::cerr << "failed to lookup in /dev/kstat\n";
return -1;
}
if (kstat_read(kc, ksp, NULL) < 0) {
std::cerr << "failed to read from /dev/kstat\n";
return -1;
}
kstat_named_t* knp = (kstat_named_t*)kstat_data_lookup(
ksp, const_cast<char*>("current_clock_Hz"));
if (!knp) {
std::cerr << "failed to lookup data in /dev/kstat\n";
return -1;
}
if (knp->data_type != KSTAT_DATA_UINT64) {
std::cerr << "current_clock_Hz is of unexpected data type: "
<< knp->data_type << "\n";
return -1;
}
double clock_hz = knp->value.ui64;
kstat_close(kc);
return clock_hz;
#elif defined(BENCHMARK_OS_QNX)
return static_cast<double>(
static_cast<int64_t>(SYSPAGE_ENTRY(cpuinfo)->speed) *
static_cast<int64_t>(1000 * 1000));
#elif defined(BENCHMARK_OS_QURT)
// QuRT doesn't provide any API to query Hexagon frequency.
return 1000000000;
#endif
// If we've fallen through, attempt to roughly estimate the CPU clock rate.
// Make sure to use the same cycle counter when starting and stopping the
// cycle timer. We just pin the current thread to a cpu in the previous
// affinity set.
ThreadAffinityGuard affinity_guard;
static constexpr double estimate_time_s = 1.0;
const double start_time = ChronoClockNow();
const auto start_ticks = cycleclock::Now();
// Impose load instead of calling sleep() to make sure the cycle counter
// works.
using PRNG = std::minstd_rand;
using Result = PRNG::result_type;
PRNG rng(static_cast<Result>(start_ticks));
Result state = 0;
do {
static constexpr size_t batch_size = 10000;
rng.discard(batch_size);
state += rng();
} while (ChronoClockNow() - start_time < estimate_time_s);
DoNotOptimize(state);
const auto end_ticks = cycleclock::Now();
const double end_time = ChronoClockNow();
return static_cast<double>(end_ticks - start_ticks) / (end_time - start_time);
// Reset the affinity of current thread when the lifetime of affinity_guard
// ends.
}
std::vector<double> GetLoadAvg() {
#if (defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) || \
defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD || \
defined BENCHMARK_OS_OPENBSD || defined BENCHMARK_OS_DRAGONFLY) && \
!(defined(__ANDROID__) && __ANDROID_API__ < 29)
static constexpr int kMaxSamples = 3;
std::vector<double> res(kMaxSamples, 0.0);
const size_t nelem = static_cast<size_t>(getloadavg(res.data(), kMaxSamples));
if (nelem < 1) {
res.clear();
} else {
res.resize(nelem);
}
return res;
#else
return {};
#endif
}
} // end namespace
const CPUInfo& CPUInfo::Get() {
static const CPUInfo* info = new CPUInfo();
return *info;
}
CPUInfo::CPUInfo()
: num_cpus(GetNumCPUs()),
scaling(CpuScaling(num_cpus)),
cycles_per_second(GetCPUCyclesPerSecond(scaling)),
caches(GetCacheSizes()),
load_avg(GetLoadAvg()) {}
const SystemInfo& SystemInfo::Get() {
static const SystemInfo* info = new SystemInfo();
return *info;
}
SystemInfo::SystemInfo() : name(GetSystemName()) {}
} // end namespace benchmark

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#ifndef BENCHMARK_THREAD_MANAGER_H
#define BENCHMARK_THREAD_MANAGER_H
#include <atomic>
#include "benchmark/benchmark.h"
#include "mutex.h"
namespace benchmark {
namespace internal {
class ThreadManager {
public:
explicit ThreadManager(int num_threads)
: alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
return benchmark_mutex_;
}
bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
return start_stop_barrier_.wait();
}
void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
start_stop_barrier_.removeThread();
if (--alive_threads_ == 0) {
MutexLock lock(end_cond_mutex_);
end_condition_.notify_all();
}
}
void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
MutexLock lock(end_cond_mutex_);
end_condition_.wait(lock.native_handle(),
[this]() { return alive_threads_ == 0; });
}
struct Result {
IterationCount iterations = 0;
double real_time_used = 0;
double cpu_time_used = 0;
double manual_time_used = 0;
int64_t complexity_n = 0;
std::string report_label_;
std::string skip_message_;
internal::Skipped skipped_ = internal::NotSkipped;
UserCounters counters;
};
GUARDED_BY(GetBenchmarkMutex()) Result results;
private:
mutable Mutex benchmark_mutex_;
std::atomic<int> alive_threads_;
Barrier start_stop_barrier_;
Mutex end_cond_mutex_;
Condition end_condition_;
};
} // namespace internal
} // namespace benchmark
#endif // BENCHMARK_THREAD_MANAGER_H

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#ifndef BENCHMARK_THREAD_TIMER_H
#define BENCHMARK_THREAD_TIMER_H
#include "check.h"
#include "timers.h"
namespace benchmark {
namespace internal {
class ThreadTimer {
explicit ThreadTimer(bool measure_process_cpu_time_)
: measure_process_cpu_time(measure_process_cpu_time_) {}
public:
static ThreadTimer Create() {
return ThreadTimer(/*measure_process_cpu_time_=*/false);
}
static ThreadTimer CreateProcessCpuTime() {
return ThreadTimer(/*measure_process_cpu_time_=*/true);
}
// Called by each thread
void StartTimer() {
running_ = true;
start_real_time_ = ChronoClockNow();
start_cpu_time_ = ReadCpuTimerOfChoice();
}
// Called by each thread
void StopTimer() {
BM_CHECK(running_);
running_ = false;
real_time_used_ += ChronoClockNow() - start_real_time_;
// Floating point error can result in the subtraction producing a negative
// time. Guard against that.
cpu_time_used_ +=
std::max<double>(ReadCpuTimerOfChoice() - start_cpu_time_, 0);
}
// Called by each thread
void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
bool running() const { return running_; }
// REQUIRES: timer is not running
double real_time_used() const {
BM_CHECK(!running_);
return real_time_used_;
}
// REQUIRES: timer is not running
double cpu_time_used() const {
BM_CHECK(!running_);
return cpu_time_used_;
}
// REQUIRES: timer is not running
double manual_time_used() const {
BM_CHECK(!running_);
return manual_time_used_;
}
private:
double ReadCpuTimerOfChoice() const {
if (measure_process_cpu_time) return ProcessCPUUsage();
return ThreadCPUUsage();
}
// should the thread, or the process, time be measured?
const bool measure_process_cpu_time;
bool running_ = false; // Is the timer running
double start_real_time_ = 0; // If running_
double start_cpu_time_ = 0; // If running_
// Accumulated time so far (does not contain current slice if running_)
double real_time_used_ = 0;
double cpu_time_used_ = 0;
// Manually set iteration time. User sets this with SetIterationTime(seconds).
double manual_time_used_ = 0;
};
} // namespace internal
} // namespace benchmark
#endif // BENCHMARK_THREAD_TIMER_H

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "timers.h"
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <shlwapi.h>
#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
#include <versionhelpers.h>
#include <windows.h>
#else
#include <fcntl.h>
#if !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <sys/types.h> // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
#include <unistd.h>
#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_DRAGONFLY || \
defined BENCHMARK_OS_MACOSX
#include <sys/sysctl.h>
#endif
#if defined(BENCHMARK_OS_MACOSX)
#include <mach/mach_init.h>
#include <mach/mach_port.h>
#include <mach/thread_act.h>
#endif
#if defined(BENCHMARK_OS_QURT)
#include <qurt.h>
#endif
#endif
#ifdef BENCHMARK_OS_EMSCRIPTEN
#include <emscripten.h>
#endif
#include <cerrno>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <limits>
#include <mutex>
#include "check.h"
#include "log.h"
#include "string_util.h"
namespace benchmark {
// Suppress unused warnings on helper functions.
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
#if defined(__NVCOMPILER)
#pragma diag_suppress declared_but_not_referenced
#endif
namespace {
#if defined(BENCHMARK_OS_WINDOWS)
double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
ULARGE_INTEGER kernel;
ULARGE_INTEGER user;
kernel.HighPart = kernel_time.dwHighDateTime;
kernel.LowPart = kernel_time.dwLowDateTime;
user.HighPart = user_time.dwHighDateTime;
user.LowPart = user_time.dwLowDateTime;
return (static_cast<double>(kernel.QuadPart) +
static_cast<double>(user.QuadPart)) *
1e-7;
}
#elif !defined(BENCHMARK_OS_FUCHSIA) && !defined(BENCHMARK_OS_QURT)
double MakeTime(struct rusage const& ru) {
return (static_cast<double>(ru.ru_utime.tv_sec) +
static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
static_cast<double>(ru.ru_stime.tv_sec) +
static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
}
#endif
#if defined(BENCHMARK_OS_MACOSX)
double MakeTime(thread_basic_info_data_t const& info) {
return (static_cast<double>(info.user_time.seconds) +
static_cast<double>(info.user_time.microseconds) * 1e-6 +
static_cast<double>(info.system_time.seconds) +
static_cast<double>(info.system_time.microseconds) * 1e-6);
}
#endif
#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
double MakeTime(struct timespec const& ts) {
return static_cast<double>(ts.tv_sec) +
(static_cast<double>(ts.tv_nsec) * 1e-9);
}
#endif
BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
std::cerr << "ERROR: " << msg << std::endl;
std::exit(EXIT_FAILURE);
}
} // end namespace
double ProcessCPUUsage() {
#if defined(BENCHMARK_OS_WINDOWS)
HANDLE proc = GetCurrentProcess();
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
&user_time))
return MakeTime(kernel_time, user_time);
DiagnoseAndExit("GetProccessTimes() failed");
#elif defined(BENCHMARK_OS_QURT)
return static_cast<double>(
qurt_timer_timetick_to_us(qurt_timer_get_ticks())) *
1.0e-6;
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
// Use Emscripten-specific API. Reported CPU time would be exactly the
// same as total time, but this is ok because there aren't long-latency
// synchronous system calls in Emscripten.
return emscripten_get_now() * 1e-3;
#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
// FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
// See https://github.com/google/benchmark/pull/292
struct timespec spec;
if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
return MakeTime(spec);
DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
#else
struct rusage ru;
if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
#endif
}
double ThreadCPUUsage() {
#if defined(BENCHMARK_OS_WINDOWS)
HANDLE this_thread = GetCurrentThread();
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
&user_time);
return MakeTime(kernel_time, user_time);
#elif defined(BENCHMARK_OS_QURT)
return static_cast<double>(
qurt_timer_timetick_to_us(qurt_timer_get_ticks())) *
1.0e-6;
#elif defined(BENCHMARK_OS_MACOSX)
// FIXME We want to use clock_gettime, but its not available in MacOS 10.11.
// See https://github.com/google/benchmark/pull/292
mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
thread_basic_info_data_t info;
mach_port_t thread = pthread_mach_thread_np(pthread_self());
if (thread_info(thread, THREAD_BASIC_INFO,
reinterpret_cast<thread_info_t>(&info),
&count) == KERN_SUCCESS) {
return MakeTime(info);
}
DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// Emscripten doesn't support traditional threads
return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_RTEMS)
// RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
// https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_ZOS)
// z/OS doesn't support CLOCK_THREAD_CPUTIME_ID.
return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_SOLARIS)
struct rusage ru;
if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
#elif defined(CLOCK_THREAD_CPUTIME_ID)
struct timespec ts;
if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
#else
#error Per-thread timing is not available on your system.
#endif
}
std::string LocalDateTimeString() {
// Write the local time in RFC3339 format yyyy-mm-ddTHH:MM:SS+/-HH:MM.
typedef std::chrono::system_clock Clock;
std::time_t now = Clock::to_time_t(Clock::now());
const std::size_t kTzOffsetLen = 6;
const std::size_t kTimestampLen = 19;
std::size_t tz_len;
std::size_t timestamp_len;
long int offset_minutes;
char tz_offset_sign = '+';
// tz_offset is set in one of three ways:
// * strftime with %z - This either returns empty or the ISO 8601 time. The
// maximum length an
// ISO 8601 string can be is 7 (e.g. -03:30, plus trailing zero).
// * snprintf with %c%02li:%02li - The maximum length is 41 (one for %c, up to
// 19 for %02li,
// one for :, up to 19 %02li, plus trailing zero).
// * A fixed string of "-00:00". The maximum length is 7 (-00:00, plus
// trailing zero).
//
// Thus, the maximum size this needs to be is 41.
char tz_offset[41];
// Long enough buffer to avoid format-overflow warnings
char storage[128];
#if defined(BENCHMARK_OS_WINDOWS)
std::tm* timeinfo_p = ::localtime(&now);
#else
std::tm timeinfo;
std::tm* timeinfo_p = &timeinfo;
::localtime_r(&now, &timeinfo);
#endif
tz_len = std::strftime(tz_offset, sizeof(tz_offset), "%z", timeinfo_p);
if (tz_len < kTzOffsetLen && tz_len > 1) {
// Timezone offset was written. strftime writes offset as +HHMM or -HHMM,
// RFC3339 specifies an offset as +HH:MM or -HH:MM. To convert, we parse
// the offset as an integer, then reprint it to a string.
offset_minutes = ::strtol(tz_offset, NULL, 10);
if (offset_minutes < 0) {
offset_minutes *= -1;
tz_offset_sign = '-';
}
tz_len = static_cast<size_t>(
::snprintf(tz_offset, sizeof(tz_offset), "%c%02li:%02li",
tz_offset_sign, offset_minutes / 100, offset_minutes % 100));
BM_CHECK(tz_len == kTzOffsetLen);
((void)tz_len); // Prevent unused variable warning in optimized build.
} else {
// Unknown offset. RFC3339 specifies that unknown local offsets should be
// written as UTC time with -00:00 timezone.
#if defined(BENCHMARK_OS_WINDOWS)
// Potential race condition if another thread calls localtime or gmtime.
timeinfo_p = ::gmtime(&now);
#else
::gmtime_r(&now, &timeinfo);
#endif
strncpy(tz_offset, "-00:00", kTzOffsetLen + 1);
}
timestamp_len =
std::strftime(storage, sizeof(storage), "%Y-%m-%dT%H:%M:%S", timeinfo_p);
BM_CHECK(timestamp_len == kTimestampLen);
// Prevent unused variable warning in optimized build.
((void)kTimestampLen);
std::strncat(storage, tz_offset, sizeof(storage) - timestamp_len - 1);
return std::string(storage);
}
} // end namespace benchmark

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#ifndef BENCHMARK_TIMERS_H
#define BENCHMARK_TIMERS_H
#include <chrono>
#include <string>
namespace benchmark {
// Return the CPU usage of the current process
double ProcessCPUUsage();
// Return the CPU usage of the children of the current process
double ChildrenCPUUsage();
// Return the CPU usage of the current thread
double ThreadCPUUsage();
#if defined(HAVE_STEADY_CLOCK)
template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
struct ChooseSteadyClock {
typedef std::chrono::high_resolution_clock type;
};
template <>
struct ChooseSteadyClock<false> {
typedef std::chrono::steady_clock type;
};
#endif
struct ChooseClockType {
#if defined(HAVE_STEADY_CLOCK)
typedef ChooseSteadyClock<>::type type;
#else
typedef std::chrono::high_resolution_clock type;
#endif
};
inline double ChronoClockNow() {
typedef ChooseClockType::type ClockType;
using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
return FpSeconds(ClockType::now().time_since_epoch()).count();
}
std::string LocalDateTimeString();
} // end namespace benchmark
#endif // BENCHMARK_TIMERS_H

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24
third_party/curl/CMake/CMakeConfigurableFile.in vendored Normal file
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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
@CMAKE_CONFIGURABLE_FILE_CONTENT@

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