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/* ----------------------------------------------------------------------------
Copyright (c) 2024-2025, Microsoft Research, Daan Leijen
This is free software; you can redistribute it and/or modify it under the
terms of the MIT license. A copy of the license can be found in the file
"LICENSE" at the root of this distribution.
-----------------------------------------------------------------------------*/
#pragma once
#ifndef MIMALLOC_STATS_H
#define MIMALLOC_STATS_H
#include <mimalloc.h>
#include <stdint.h>
#define MI_STAT_VERSION 3 // increased on every backward incompatible change
// alignment for atomic fields
#if defined(_MSC_VER)
#define mi_decl_align(a) __declspec(align(a))
#elif defined(__GNUC__)
#define mi_decl_align(a) __attribute__((aligned(a)))
#elif __cplusplus >= 201103L
#define mi_decl_align(a) alignas(a)
#else
#define mi_decl_align(a)
#endif
// count allocation over time
typedef struct mi_stat_count_s {
int64_t total; // total allocated
int64_t peak; // peak allocation
int64_t current; // current allocation
} mi_stat_count_t;
// counters only increase
typedef struct mi_stat_counter_s {
int64_t total; // total count
} mi_stat_counter_t;
#define MI_STAT_FIELDS() \
MI_STAT_COUNT(pages) /* count of mimalloc pages */ \
MI_STAT_COUNT(reserved) /* reserved memory bytes */ \
MI_STAT_COUNT(committed) /* committed bytes */ \
MI_STAT_COUNTER(reset) /* reset bytes */ \
MI_STAT_COUNTER(purged) /* purged bytes */ \
MI_STAT_COUNT(page_committed) /* committed memory inside pages */ \
MI_STAT_COUNT(pages_abandoned) /* abandonded pages count */ \
MI_STAT_COUNT(threads) /* number of threads */ \
MI_STAT_COUNT(malloc_normal) /* allocated bytes <= MI_LARGE_OBJ_SIZE_MAX */ \
MI_STAT_COUNT(malloc_huge) /* allocated bytes in huge pages */ \
MI_STAT_COUNT(malloc_requested) /* malloc requested bytes */ \
\
MI_STAT_COUNTER(mmap_calls) \
MI_STAT_COUNTER(commit_calls) \
MI_STAT_COUNTER(reset_calls) \
MI_STAT_COUNTER(purge_calls) \
MI_STAT_COUNTER(arena_count) /* number of memory arena's */ \
MI_STAT_COUNTER(malloc_normal_count) /* number of blocks <= MI_LARGE_OBJ_SIZE_MAX */ \
MI_STAT_COUNTER(malloc_huge_count) /* number of huge bloks */ \
MI_STAT_COUNTER(malloc_guarded_count) /* number of allocations with guard pages */ \
\
/* internal statistics */ \
MI_STAT_COUNTER(arena_rollback_count) \
MI_STAT_COUNTER(arena_purges) \
MI_STAT_COUNTER(pages_extended) /* number of page extensions */ \
MI_STAT_COUNTER(pages_retire) /* number of pages that are retired */ \
MI_STAT_COUNTER(page_searches) /* total pages searched for a fresh page */ \
MI_STAT_COUNTER(page_searches_count) /* searched count for a fresh page */ \
/* only on v1 and v2 */ \
MI_STAT_COUNT(segments) \
MI_STAT_COUNT(segments_abandoned) \
MI_STAT_COUNT(segments_cache) \
MI_STAT_COUNT(_segments_reserved) \
/* only on v3 */ \
MI_STAT_COUNT(heaps) \
MI_STAT_COUNTER(pages_reclaim_on_alloc) \
MI_STAT_COUNTER(pages_reclaim_on_free) \
MI_STAT_COUNTER(pages_reabandon_full) \
MI_STAT_COUNTER(pages_unabandon_busy_wait)
// Size bins for chunks
typedef enum mi_chunkbin_e {
MI_CBIN_SMALL, // slice_count == 1
MI_CBIN_OTHER, // slice_count: any other from the other bins, and 1 <= slice_count <= MI_BCHUNK_BITS
MI_CBIN_MEDIUM, // slice_count == 8
MI_CBIN_LARGE, // slice_count == MI_SIZE_BITS (only used if MI_ENABLE_LARGE_PAGES is 1)
MI_CBIN_HUGE, // slice_count > MI_BCHUNK_BITS
MI_CBIN_NONE, // no bin assigned yet (the chunk is completely free)
MI_CBIN_COUNT
} mi_chunkbin_t;
// Define the statistics structure
#define MI_BIN_HUGE (73U) // see types.h
#define MI_STAT_COUNT(stat) mi_stat_count_t stat;
#define MI_STAT_COUNTER(stat) mi_stat_counter_t stat;
typedef struct mi_stats_s
{
int version;
mi_decl_align(8) MI_STAT_FIELDS()
// future extension
mi_stat_count_t _stat_reserved[4];
mi_stat_counter_t _stat_counter_reserved[4];
// size segregated statistics
mi_stat_count_t malloc_bins[MI_BIN_HUGE+1]; // allocation per size bin
mi_stat_count_t page_bins[MI_BIN_HUGE+1]; // pages allocated per size bin
mi_stat_count_t chunk_bins[MI_CBIN_COUNT]; // chunks per page sizes
} mi_stats_t;
#undef MI_STAT_COUNT
#undef MI_STAT_COUNTER
// Exported definitions
#ifdef __cplusplus
extern "C" {
#endif
// stats from a heap
mi_decl_export void mi_heap_stats_get(mi_heap_t* heap, size_t stats_size, mi_stats_t* stats) mi_attr_noexcept;
mi_decl_export char* mi_heap_stats_get_json(mi_heap_t* heap, size_t buf_size, char* buf) mi_attr_noexcept; // use mi_free to free the result if the input buf == NULL
mi_decl_export void mi_heap_stats_print_out(mi_heap_t* heap, mi_output_fun* out, void* arg) mi_attr_noexcept;
mi_decl_export void mi_heap_stats_merge_to_subproc(mi_heap_t* heap);
// subprocess stats
mi_decl_export void mi_subproc_stats_get(mi_subproc_id_t subproc_id, size_t stats_size, mi_stats_t* stats) mi_attr_noexcept;
mi_decl_export char* mi_subproc_stats_get_json(mi_subproc_id_t subproc_id, size_t buf_size, char* buf) mi_attr_noexcept; // use mi_free to free the result if the input buf == NULL
mi_decl_export void mi_subproc_stats_print_out(mi_subproc_id_t subproc_id, mi_output_fun* out, void* arg) mi_attr_noexcept;
// subprocess and its heap stats segregated
mi_decl_export void mi_subproc_heap_stats_print_out(mi_subproc_id_t subproc_id, mi_output_fun* out, void* arg) mi_attr_noexcept;
// stats aggregated for the current subprocess and all its heaps.
mi_decl_export void mi_stats_get(size_t stats_size, mi_stats_t* stats) mi_attr_noexcept;
mi_decl_export char* mi_stats_get_json(size_t buf_size, char* buf) mi_attr_noexcept; // use mi_free to free the result if the input buf == NULL
mi_decl_export void mi_stats_print_out(mi_output_fun* out, void* arg) mi_attr_noexcept;
mi_decl_export size_t mi_stats_get_bin_size(size_t bin) mi_attr_noexcept;
#ifdef __cplusplus
}
#endif
#endif // MIMALLOC_STATS_H
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