140 lines
3.8 KiB
C
140 lines
3.8 KiB
C
#ifndef JEMALLOC_INTERNAL_HPA_H
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#define JEMALLOC_INTERNAL_HPA_H
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#include "jemalloc/internal/exp_grow.h"
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#include "jemalloc/internal/hpa_central.h"
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#include "jemalloc/internal/pai.h"
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#include "jemalloc/internal/psset.h"
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typedef struct hpa_shard_nonderived_stats_s hpa_shard_nonderived_stats_t;
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struct hpa_shard_nonderived_stats_s {
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/*
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* The number of times we've purged within a hugepage.
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*
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* Guarded by mtx.
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*/
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uint64_t npurge_passes;
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/*
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* The number of individual purge calls we perform (which should always
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* be bigger than npurge_passes, since each pass purges at least one
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* extent within a hugepage.
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*
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* Guarded by mtx.
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*/
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uint64_t npurges;
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/*
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* The number of times we've hugified a pageslab.
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*
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* Guarded by mtx.
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*/
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uint64_t nhugifies;
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/*
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* The number of times we've dehugified a pageslab.
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*
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* Guarded by mtx.
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*/
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uint64_t ndehugifies;
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};
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/* Completely derived; only used by CTL. */
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typedef struct hpa_shard_stats_s hpa_shard_stats_t;
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struct hpa_shard_stats_s {
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psset_stats_t psset_stats;
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hpa_shard_nonderived_stats_t nonderived_stats;
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};
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typedef struct hpa_shard_s hpa_shard_t;
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struct hpa_shard_s {
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/*
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* pai must be the first member; we cast from a pointer to it to a
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* pointer to the hpa_shard_t.
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*/
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pai_t pai;
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malloc_mutex_t grow_mtx;
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malloc_mutex_t mtx;
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/* The base metadata allocator. */
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base_t *base;
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/*
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* This edata cache is the one we use when allocating a small extent
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* from a pageslab. The pageslab itself comes from the centralized
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* allocator, and so will use its edata_cache.
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*/
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edata_cache_small_t ecs;
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psset_t psset;
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/*
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* The largest size we'll allocate out of the shard. For those
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* allocations refused, the caller (in practice, the PA module) will
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* fall back to the more general (for now) PAC, which can always handle
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* any allocation request.
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*/
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size_t alloc_max;
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/*
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* How many grow operations have occurred.
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*
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* Guarded by grow_mtx.
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*/
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uint64_t age_counter;
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/*
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* Either NULL (if empty), or some integer multiple of a
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* hugepage-aligned number of hugepages. We carve them off one at a
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* time to satisfy new pageslab requests.
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*
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* Guarded by grow_mtx.
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*/
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void *eden;
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size_t eden_len;
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/* The arena ind we're associated with. */
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unsigned ind;
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emap_t *emap;
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/*
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* How many pages have we started but not yet finished purging in this
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* hpa shard.
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*/
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size_t npending_purge;
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/*
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* Those stats which are copied directly into the CTL-centric hpa shard
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* stats.
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*/
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hpa_shard_nonderived_stats_t stats;
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};
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/*
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* Whether or not the HPA can be used given the current configuration. This is
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* is not necessarily a guarantee that it backs its allocations by hugepages,
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* just that it can function properly given the system it's running on.
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*/
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bool hpa_supported();
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bool hpa_shard_init(hpa_shard_t *shard, emap_t *emap, base_t *base,
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edata_cache_t *edata_cache, unsigned ind, size_t alloc_max);
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void hpa_shard_stats_accum(hpa_shard_stats_t *dst, hpa_shard_stats_t *src);
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void hpa_shard_stats_merge(tsdn_t *tsdn, hpa_shard_t *shard,
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hpa_shard_stats_t *dst);
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/*
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* Notify the shard that we won't use it for allocations much longer. Due to
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* the possibility of races, we don't actually prevent allocations; just flush
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* and disable the embedded edata_cache_small.
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*/
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void hpa_shard_disable(tsdn_t *tsdn, hpa_shard_t *shard);
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void hpa_shard_destroy(tsdn_t *tsdn, hpa_shard_t *shard);
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/*
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* We share the fork ordering with the PA and arena prefork handling; that's why
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* these are 3 and 4 rather than 0 and 1.
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*/
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void hpa_shard_prefork3(tsdn_t *tsdn, hpa_shard_t *shard);
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void hpa_shard_prefork4(tsdn_t *tsdn, hpa_shard_t *shard);
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void hpa_shard_postfork_parent(tsdn_t *tsdn, hpa_shard_t *shard);
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void hpa_shard_postfork_child(tsdn_t *tsdn, hpa_shard_t *shard);
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#endif /* JEMALLOC_INTERNAL_HPA_H */
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