83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
#ifndef JEMALLOC_INTERNAL_BIN_H
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#define JEMALLOC_INTERNAL_BIN_H
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#include "jemalloc/internal/bin_stats.h"
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#include "jemalloc/internal/bin_types.h"
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#include "jemalloc/internal/edata.h"
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#include "jemalloc/internal/mutex.h"
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#include "jemalloc/internal/sc.h"
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/*
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* A bin contains a set of extents that are currently being used for slab
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* allocations.
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*/
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typedef struct bin_s bin_t;
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struct bin_s {
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/* All operations on bin_t fields require lock ownership. */
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malloc_mutex_t lock;
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/*
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* Bin statistics. These get touched every time the lock is acquired,
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* so put them close by in the hopes of getting some cache locality.
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*/
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bin_stats_t stats;
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/*
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* Current slab being used to service allocations of this bin's size
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* class. slabcur is independent of slabs_{nonfull,full}; whenever
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* slabcur is reassigned, the previous slab must be deallocated or
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* inserted into slabs_{nonfull,full}.
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*/
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edata_t *slabcur;
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/*
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* Heap of non-full slabs. This heap is used to assure that new
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* allocations come from the non-full slab that is oldest/lowest in
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* memory.
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*/
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edata_heap_t slabs_nonfull;
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/* List used to track full slabs. */
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edata_list_active_t slabs_full;
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};
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/* A set of sharded bins of the same size class. */
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typedef struct bins_s bins_t;
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struct bins_s {
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/* Sharded bins. Dynamically sized. */
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bin_t *bin_shards;
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};
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void bin_shard_sizes_boot(unsigned bin_shards[SC_NBINS]);
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bool bin_update_shard_size(unsigned bin_shards[SC_NBINS], size_t start_size,
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size_t end_size, size_t nshards);
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/* Initializes a bin to empty. Returns true on error. */
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bool bin_init(bin_t *bin);
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/* Forking. */
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void bin_prefork(tsdn_t *tsdn, bin_t *bin);
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void bin_postfork_parent(tsdn_t *tsdn, bin_t *bin);
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void bin_postfork_child(tsdn_t *tsdn, bin_t *bin);
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/* Stats. */
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static inline void
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bin_stats_merge(tsdn_t *tsdn, bin_stats_data_t *dst_bin_stats, bin_t *bin) {
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malloc_mutex_lock(tsdn, &bin->lock);
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malloc_mutex_prof_accum(tsdn, &dst_bin_stats->mutex_data, &bin->lock);
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bin_stats_t *stats = &dst_bin_stats->stats_data;
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stats->nmalloc += bin->stats.nmalloc;
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stats->ndalloc += bin->stats.ndalloc;
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stats->nrequests += bin->stats.nrequests;
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stats->curregs += bin->stats.curregs;
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stats->nfills += bin->stats.nfills;
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stats->nflushes += bin->stats.nflushes;
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stats->nslabs += bin->stats.nslabs;
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stats->reslabs += bin->stats.reslabs;
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stats->curslabs += bin->stats.curslabs;
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stats->nonfull_slabs += bin->stats.nonfull_slabs;
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malloc_mutex_unlock(tsdn, &bin->lock);
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}
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#endif /* JEMALLOC_INTERNAL_BIN_H */
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