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328 lines
11 KiB
Markdown
328 lines
11 KiB
Markdown
# easy_profiler [](https://github.com/yse/easy_profiler/releases) [](https://github.com/yse/easy_profiler)
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[](https://travis-ci.org/yse/easy_profiler)
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[](https://ci.appveyor.com/project/yse/easy-profiler/branch/develop)
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[](https://opensource.org/licenses/MIT)
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[](https://www.apache.org/licenses/LICENSE-2.0)
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1. [About](#about)
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2. [Key features](#key-features)
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3. [Usage](#usage)
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- [Integration](#integration)
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- [General build system](#general)
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- [CMake](#if-using-cmake)
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- [Inserting blocks](#inserting-blocks)
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- [Storing variables](#storing-variables)
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- [Collect profiling data](#collect-profiling-data)
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- [Streaming over network](#streaming-over-network)
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- [Dump to file](#dump-to-file)
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- [Note about thread context-switch events](#note-about-thread-context-switch-events)
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- [Profiling application startup](#profiling-application-startup)
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4. [Build](#build)
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- [Linux](#linux)
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- [MacOS](#macos)
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- [Windows](#windows)
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- [QNX](#qnx)
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- [Android](#android)
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5. [Notes about major release (1.0 -> 2.0)](#status)
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6. [License](#license)
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# About
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Lightweight cross-platform profiler library for c++
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You can profile any function in you code. Furthermore this library provide measuring time of any block of code.
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For example, information for 12 millions of blocks is using less than 300Mb of memory.
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Working profiler slows your application execution for only 1-2%.
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_Average overhead per block is about 15ns/block (tested on Intel Core i7-5930K 3.5GHz, Win7)_
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Disabled profiler will not affect your application execution in any way. You can leave it in your Release build
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and enable it at run-time at any moment during application launch to see what is happening at the moment.
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Also the library can capture system's context switch events between threads. Context switch information includes
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duration, target thread id, thread owner process id, thread owner process name.
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You can see the results of measuring in simple GUI application which provides full statistics and renders beautiful time-line.
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_Profiling CryEngine SDK example_
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_New UI style in version 2.0_
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# Key features
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- Extremely low overhead
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- Low additional memory usage
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- Cross-platform
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- Profiling over network
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- Capture thread context-switch events
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- Store user variables (both single values and arrays)
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- GUI could be connected to an application which is already profiling (so you can profile initialization of your application)
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- Monitor main thread fps at real-time in GUI even if profiling is disabled or draw your own HUD/fps-plot directly in your application using data provided by profiler
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- Save a snapshot (selected area) of profiled data from file
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- Add bookmarks at any place on the timeline
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- Configurable timer type with CMakeLists or preprocessor macros
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# Usage
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## Integration
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### General
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First of all you can specify path to include directory which contains `include/profiler` directory and define macro `BUILD_WITH_EASY_PROFILER`.
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For linking with easy_profiler you can specify path to library.
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### If using CMake
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If you are using `cmake` set `CMAKE_PREFIX_PATH` to `lib/cmake/easy_profiler` directory (from [release](https://github.com/yse/easy_profiler/releases) package) and use function `find_package(easy_profiler)` with `target_link_libraries(... easy_profiler)`.
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Example:
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``` cmake
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project(my_application)
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set(SOURCES
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main.cpp
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)
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# CMAKE_PREFIX_PATH should be set to <easy_profiler-release_dir>/lib/cmake/easy_profiler
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find_package(easy_profiler REQUIRED) # STEP 1 #########################
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add_executable(my_application ${SOURCES})
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target_link_libraries(my_application easy_profiler) # STEP 2 ##########
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```
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## Inserting blocks
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Example of usage.
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```cpp
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#include <easy/profiler.h>
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void foo() {
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EASY_FUNCTION(profiler::colors::Magenta); // Magenta block with name "foo"
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EASY_BLOCK("Calculating sum"); // Begin block with default color == Amber100
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int sum = 0;
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for (int i = 0; i < 10; ++i) {
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EASY_BLOCK("Addition", profiler::colors::Red); // Scoped red block (no EASY_END_BLOCK needed)
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sum += i;
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}
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EASY_END_BLOCK; // End of "Calculating sum" block
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EASY_BLOCK("Calculating multiplication", profiler::colors::Blue500); // Blue block
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int mul = 1;
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for (int i = 1; i < 11; ++i)
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mul *= i;
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//EASY_END_BLOCK; // This is not needed because all blocks are ended on destructor when closing braces met
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}
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void bar() {
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EASY_FUNCTION(0xfff080aa); // Function block with custom ARGB color
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}
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void baz() {
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EASY_FUNCTION(); // Function block with default color == Amber100
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}
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```
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EasyProfiler is using Google Material-Design colors palette, but you can use custom colors in ARGB format (like shown in example above).
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The default color is `Amber100` (it is used when you do not specify color explicitly).
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## Storing variables
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Example of storing variables:
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```cpp
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#include <easy/profiler.h>
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#include <easy/arbitrary_value.h> // EASY_VALUE, EASY_ARRAY are defined here
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class Object {
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Vector3 m_position; // Let's suppose Vector3 is a struct { float x, y, z; };
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unsigned int m_id;
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public:
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void act() {
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EASY_FUNCTION(profiler::colors::Cyan);
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// Dump variables values
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constexpr auto Size = sizeof(Vector3) / sizeof(float);
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EASY_VALUE("id", m_id);
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EASY_ARRAY("position", &m_position.x, Size, profiler::color::Red);
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// Do something ...
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}
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void loop(uint32_t N) {
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EASY_FUNCTION();
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EASY_VALUE("N", N, EASY_VIN("N")); /* EASY_VIN is used here to ensure
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that this value id will always be
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the same, because the address of N
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can change */
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for (uint32_t i = 0; i < N; ++i) {
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// Do something
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}
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}
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};
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```
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## Collect profiling data
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There are two ways to collect profiling data: streaming over network and dumping data to file.
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### Streaming over network
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This is the most preferred and convenient method in many cases.
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1. (In profiled app) Invoke `profiler::startListen()`. This will start new thread to listen `28077` port for the start-capture-signal from profiler_gui.
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2. (In UI) Connect profiler_gui to your application using `hostname` or `IP-address`.
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3. (In UI) Press `Start capture` button in profiler_gui.
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4. (In UI) Press `Stop capture` button in profiler_gui to stop capturing and wait until profiled data will be passed over network.
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5. (Optional step)(In profiled app) Invoke `profiler::stopListen()` to stop listening.
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Example:
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```cpp
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void main() {
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profiler::startListen();
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/* do work */
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}
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```
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### Dump to file
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1. (Profiled application) Start capturing by putting `EASY_PROFILER_ENABLE` macro somewhere into the code.
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2. (Profiled application) Dump profiled data to file in any place you want by `profiler::dumpBlocksToFile("test_profile.prof")` function.
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Example:
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```cpp
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void main() {
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EASY_PROFILER_ENABLE;
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/* do work */
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profiler::dumpBlocksToFile("test_profile.prof");
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}
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```
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### Note about thread context-switch events
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To capture a thread context-switch events you need:
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- On Windows: launch your application "as Administrator"
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- On Linux: you can launch special `systemtap` script with root privileges as follow (example on Fedora):
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```bash
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#stap -o /tmp/cs_profiling_info.log scripts/context_switch_logger.stp name APPLICATION_NAME
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```
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APPLICATION_NAME - name of your application
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There are some known issues on a linux based systems (for more information see [wiki](https://github.com/yse/easy_profiler/wiki/Known-bugs-and-issues))
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### Profiling application startup
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To profile your application startup (when using [network](#streaming-over-network) method) add `EASY_PROFILER_ENABLE` macro into the code together with `profiler::startListen()`.
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Example:
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```cpp
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void main() {
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EASY_PROFILER_ENABLE;
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profiler::startListen();
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/* do work */
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}
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```
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This will allow you to collect profiling data before profiler_gui connection. profiler_gui will automatically display capturing dialog window after successful connection to the profiled application.
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# Build
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## Prerequisites
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* CMake 3.0 or higher
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* Compiler with c++11 support
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* for Unix systems: compiler with `thread_local` support is **highly recommended**: _GCC >=4.8_, _Clang >=3.3_
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Additional requirements for GUI:
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* Qt 5.3.0 or higher
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## Linux
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```bash
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_BUILD_TYPE="Release" ..
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$ make
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```
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## MacOS
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```bash
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_CXX_COMPILER=g++-5 -DCMAKE_C_COMPILER=gcc-5 -DCMAKE_BUILD_TYPE="Release" ..
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$ make
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```
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## Windows
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If you are using QtCreator IDE you can just open `CMakeLists.txt` file in root directory.
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If you are using Visual Studio you can generate solution by cmake generator command.
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Examples shows how to generate Win64 solution for Visual Studio 2013. To generate for another version use proper cmake generator (-G "name of generator").
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### Way 1
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Specify path to cmake scripts in Qt5 dir (usually in lib/cmake subdir) and execute cmake generator command,
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for example:
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```batch
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_PREFIX_PATH="C:\Qt\5.3\msvc2013_64\lib\cmake" .. -G "Visual Studio 12 2013 Win64"
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```
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### Way 2
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Create system variable "Qt5Widgets_DIR" and set it's value to "[path-to-Qt5-binaries]\lib\cmake\Qt5Widgets".
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For example, "C:\Qt\5.3\msvc2013_64\lib\cmake\Qt5Widgets".
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And then run cmake generator as follows:
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```batch
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$ mkdir build
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$ cd build
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$ cmake .. -G "Visual Studio 12 2013 Win64"
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```
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## QNX
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```bash
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$ souce $QNX_ENVIRONMENT
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$ mkdir build
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$ cd build
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$ cmake -DCMAKE_TOOLCHAIN_FILE=/path/to/QNXToolchain.cmake ..
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```
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For more information and example for `QNXToolchain.cmake` see [this PR](https://github.com/yse/easy_profiler/pull/145)
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## Android
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You can build native library for android by using NDK and standalone toolchain. See [comment for this PR](https://github.com/yse/easy_profiler/pull/137#issuecomment-436167127) to get a more detailed instruction.
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# Status
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Branch `develop` contains all v2.0.0 features and new UI style.
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Please, note that .prof file header has changed in v2.0.0:
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```cpp
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struct EasyFileHeader {
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uint32_t signature = 0;
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uint32_t version = 0;
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profiler::processid_t pid = 0;
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int64_t cpu_frequency = 0;
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profiler::timestamp_t begin_time = 0;
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profiler::timestamp_t end_time = 0;
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// Changed order of memory_size and blocks_number relative to v1.3.0
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uint64_t memory_size = 0;
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uint64_t descriptors_memory_size = 0;
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uint32_t total_blocks_number = 0;
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uint32_t total_descriptors_number = 0;
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};
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```
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# License
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Licensed under either of
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- MIT license ([LICENSE.MIT](LICENSE.MIT) or http://opensource.org/licenses/MIT)
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- Apache License, Version 2.0, ([LICENSE.APACHE](LICENSE.APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
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at your option.
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