51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
#ifndef JEMALLOC_INTERNAL_BIN_INFO_H
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#define JEMALLOC_INTERNAL_BIN_INFO_H
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#include "jemalloc/internal/bitmap.h"
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/*
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* Read-only information associated with each element of arena_t's bins array
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* is stored separately, partly to reduce memory usage (only one copy, rather
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* than one per arena), but mainly to avoid false cacheline sharing.
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*
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* Each slab has the following layout:
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*
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* /--------------------\
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* | region 0 |
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* |--------------------|
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* | region 1 |
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* |--------------------|
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* | ... |
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* | ... |
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* | ... |
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* |--------------------|
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* | region nregs-1 |
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* \--------------------/
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*/
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typedef struct bin_info_s bin_info_t;
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struct bin_info_s {
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/* Size of regions in a slab for this bin's size class. */
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size_t reg_size;
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/* Total size of a slab for this bin's size class. */
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size_t slab_size;
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/* Total number of regions in a slab for this bin's size class. */
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uint32_t nregs;
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/* Number of sharded bins in each arena for this size class. */
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uint32_t n_shards;
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/*
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* Metadata used to manipulate bitmaps for slabs associated with this
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* bin.
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*/
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bitmap_info_t bitmap_info;
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};
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extern bin_info_t bin_infos[SC_NBINS];
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void bin_info_boot(sc_data_t *sc_data, unsigned bin_shard_sizes[SC_NBINS]);
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#endif /* JEMALLOC_INTERNAL_BIN_INFO_H */
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