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| author | Joerg Koenig <jck@techsat.com> | 2018-01-19 10:53:15 (GMT) |
|---|---|---|
| committer | Joerg Koenig <jck@techsat.com> | 2018-01-19 10:53:15 (GMT) |
| commit | aa502047980c13cdbe5a1adb7f024199c367254d (patch) | |
| tree | 8cc6a214bde51a42beb77ac92fe0d00dd44c0c90 /include/jemalloc/internal/bin.h | |
| parent | 3f5049340e66c6929c3270f7359617f62e053b11 (diff) | |
| parent | f78d4ca3fbff6cab0c704c787706a53ddafcbe13 (diff) | |
| download | jemalloc-master.zip jemalloc-master.tar.gz jemalloc-master.tar.bz2 | |
Change-Id: I44881ca21f4710f7ad5154a45c4a7204ae71c84c
Diffstat (limited to 'include/jemalloc/internal/bin.h')
| -rw-r--r-- | include/jemalloc/internal/bin.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/include/jemalloc/internal/bin.h b/include/jemalloc/internal/bin.h new file mode 100644 index 0000000..9b416ad --- /dev/null +++ b/include/jemalloc/internal/bin.h @@ -0,0 +1,106 @@ +#ifndef JEMALLOC_INTERNAL_BIN_H +#define JEMALLOC_INTERNAL_BIN_H + +#include "jemalloc/internal/extent_types.h" +#include "jemalloc/internal/extent_structs.h" +#include "jemalloc/internal/mutex.h" +#include "jemalloc/internal/bin_stats.h" + +/* + * A bin contains a set of extents that are currently being used for slab + * allocations. + */ + +/* + * Read-only information associated with each element of arena_t's bins array + * is stored separately, partly to reduce memory usage (only one copy, rather + * than one per arena), but mainly to avoid false cacheline sharing. + * + * Each slab has the following layout: + * + * /--------------------\ + * | region 0 | + * |--------------------| + * | region 1 | + * |--------------------| + * | ... | + * | ... | + * | ... | + * |--------------------| + * | region nregs-1 | + * \--------------------/ + */ +typedef struct bin_info_s bin_info_t; +struct bin_info_s { + /* Size of regions in a slab for this bin's size class. */ + size_t reg_size; + + /* Total size of a slab for this bin's size class. */ + size_t slab_size; + + /* Total number of regions in a slab for this bin's size class. */ + uint32_t nregs; + + /* + * Metadata used to manipulate bitmaps for slabs associated with this + * bin. + */ + bitmap_info_t bitmap_info; +}; + +extern const bin_info_t bin_infos[NBINS]; + + +typedef struct bin_s bin_t; +struct bin_s { + /* All operations on bin_t fields require lock ownership. */ + malloc_mutex_t lock; + + /* + * Current slab being used to service allocations of this bin's size + * class. slabcur is independent of slabs_{nonfull,full}; whenever + * slabcur is reassigned, the previous slab must be deallocated or + * inserted into slabs_{nonfull,full}. + */ + extent_t *slabcur; + + /* + * Heap of non-full slabs. This heap is used to assure that new + * allocations come from the non-full slab that is oldest/lowest in + * memory. + */ + extent_heap_t slabs_nonfull; + + /* List used to track full slabs. */ + extent_list_t slabs_full; + + /* Bin statistics. */ + bin_stats_t stats; +}; + +/* Initializes a bin to empty. Returns true on error. */ +bool bin_init(bin_t *bin); + +/* Forking. */ +void bin_prefork(tsdn_t *tsdn, bin_t *bin); +void bin_postfork_parent(tsdn_t *tsdn, bin_t *bin); +void bin_postfork_child(tsdn_t *tsdn, bin_t *bin); + +/* Stats. */ +static inline void +bin_stats_merge(tsdn_t *tsdn, bin_stats_t *dst_bin_stats, bin_t *bin) { + malloc_mutex_lock(tsdn, &bin->lock); + malloc_mutex_prof_read(tsdn, &dst_bin_stats->mutex_data, &bin->lock); + dst_bin_stats->nmalloc += bin->stats.nmalloc; + dst_bin_stats->ndalloc += bin->stats.ndalloc; + dst_bin_stats->nrequests += bin->stats.nrequests; + dst_bin_stats->curregs += bin->stats.curregs; + dst_bin_stats->nfills += bin->stats.nfills; + dst_bin_stats->nflushes += bin->stats.nflushes; + dst_bin_stats->nslabs += bin->stats.nslabs; + dst_bin_stats->reslabs += bin->stats.reslabs; + dst_bin_stats->curslabs += bin->stats.curslabs; + malloc_mutex_unlock(tsdn, &bin->lock); +} + +#endif /* JEMALLOC_INTERNAL_BIN_H */ |