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improve display of arenas and contained blocks

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daanx 2024-03-01 16:24:28 -08:00
parent f5f61a65f5
commit 16c0948ee5
3 changed files with 38 additions and 12 deletions
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2
include/mimalloc.h
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@ -274,6 +274,8 @@ mi_decl_export int mi_reserve_huge_os_pages_at(size_t pages, int numa_node, size
mi_decl_export int mi_reserve_os_memory(size_t size, bool commit, bool allow_large) mi_attr_noexcept;
mi_decl_export bool mi_manage_os_memory(void* start, size_t size, bool is_committed, bool is_large, bool is_zero, int numa_node) mi_attr_noexcept;
mi_decl_export void mi_debug_show_arenas(bool show_inuse, bool show_abandoned, bool show_purge) mi_attr_noexcept;
// Experimental: heaps associated with specific memory arena's
typedef int mi_arena_id_t;
mi_decl_export void* mi_arena_area(mi_arena_id_t arena_id, size_t* size);

45
src/arena.c
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@ -949,32 +949,55 @@ int mi_reserve_os_memory(size_t size, bool commit, bool allow_large) mi_attr_noe
Debugging
----------------------------------------------------------- */
static size_t mi_debug_show_bitmap(const char* prefix, mi_bitmap_field_t* fields, size_t field_count ) {
static size_t mi_debug_show_bitmap(const char* prefix, const char* header, size_t block_count, mi_bitmap_field_t* fields, size_t field_count ) {
_mi_verbose_message("%s%s:\n", prefix, header);
size_t bcount = 0;
size_t inuse_count = 0;
for (size_t i = 0; i < field_count; i++) {
char buf[MI_BITMAP_FIELD_BITS + 1];
uintptr_t field = mi_atomic_load_relaxed(&fields[i]);
for (size_t bit = 0; bit < MI_BITMAP_FIELD_BITS; bit++) {
bool inuse = ((((uintptr_t)1 << bit) & field) != 0);
if (inuse) inuse_count++;
buf[MI_BITMAP_FIELD_BITS - 1 - bit] = (inuse ? 'x' : '.');
for (size_t bit = 0; bit < MI_BITMAP_FIELD_BITS; bit++, bcount++) {
if (bcount < block_count) {
bool inuse = ((((uintptr_t)1 << bit) & field) != 0);
if (inuse) inuse_count++;
buf[bit] = (inuse ? 'x' : '.');
}
else {
buf[bit] = ' ';
}
}
buf[MI_BITMAP_FIELD_BITS] = 0;
_mi_verbose_message("%s%s\n", prefix, buf);
_mi_verbose_message("%s %s\n", prefix, buf);
}
_mi_verbose_message("%s total ('x'): %zu\n", prefix, inuse_count);
return inuse_count;
}
void mi_debug_show_arenas(void) mi_attr_noexcept {
void mi_debug_show_arenas(bool show_inuse, bool show_abandoned, bool show_purge) mi_attr_noexcept {
size_t max_arenas = mi_atomic_load_relaxed(&mi_arena_count);
size_t inuse_total = 0;
size_t abandoned_total = 0;
size_t purge_total = 0;
for (size_t i = 0; i < max_arenas; i++) {
mi_arena_t* arena = mi_atomic_load_ptr_relaxed(mi_arena_t, &mi_arenas[i]);
if (arena == NULL) break;
size_t inuse_count = 0;
_mi_verbose_message("arena %zu: %zu blocks with %zu fields\n", i, arena->block_count, arena->field_count);
inuse_count += mi_debug_show_bitmap(" ", arena->blocks_inuse, arena->field_count);
_mi_verbose_message(" blocks in use ('x'): %zu\n", inuse_count);
_mi_verbose_message("arena %zu: %zu blocks of size %zuMiB (in %zu fields) %s\n", i, arena->block_count, MI_ARENA_BLOCK_SIZE / MI_MiB, arena->field_count, (arena->memid.is_pinned ? ", pinned" : ""));
if (show_inuse) {
inuse_total += mi_debug_show_bitmap(" ", "inuse blocks", arena->block_count, arena->blocks_inuse, arena->field_count);
}
if (arena->blocks_committed != NULL) {
mi_debug_show_bitmap(" ", "committed blocks", arena->block_count, arena->blocks_committed, arena->field_count);
}
if (show_abandoned) {
abandoned_total += mi_debug_show_bitmap(" ", "abandoned blocks", arena->block_count, arena->blocks_abandoned, arena->field_count);
}
if (show_purge && arena->blocks_purge != NULL) {
purge_total += mi_debug_show_bitmap(" ", "purgeable blocks", arena->block_count, arena->blocks_purge, arena->field_count);
}
}
if (show_inuse) _mi_verbose_message("total inuse blocks : %zu\n", inuse_total);
if (show_abandoned) _mi_verbose_message("total abandoned blocks: %zu\n", abandoned_total);
if (show_purge) _mi_verbose_message("total purgeable blocks: %zu\n", purge_total);
}

3
test/test-stress.c
View File

@ -267,7 +267,8 @@ int main(int argc, char** argv) {
#ifndef USE_STD_MALLOC
#ifndef NDEBUG
mi_collect(true);
// mi_collect(true);
mi_debug_show_arenas(true,true,true);
#endif
mi_stats_print(NULL);
#endif