server-skynet-source-3rd-je.../include/jemalloc/internal/hpa.h

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#ifndef JEMALLOC_INTERNAL_HPA_H
#define JEMALLOC_INTERNAL_HPA_H
#include "jemalloc/internal/exp_grow.h"
#include "jemalloc/internal/hpa_central.h"
#include "jemalloc/internal/pai.h"
#include "jemalloc/internal/psset.h"
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/* Used only by CTL; not actually stored here (i.e., all derived). */
typedef struct hpa_shard_stats_s hpa_shard_stats_t;
struct hpa_shard_stats_s {
psset_stats_t psset_stats;
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};
typedef struct hpa_shard_s hpa_shard_t;
struct hpa_shard_s {
/*
* pai must be the first member; we cast from a pointer to it to a
* pointer to the hpa_shard_t.
*/
pai_t pai;
malloc_mutex_t grow_mtx;
malloc_mutex_t mtx;
/* The base metadata allocator. */
base_t *base;
/*
* This edata cache is the one we use when allocating a small extent
* from a pageslab. The pageslab itself comes from the centralized
* allocator, and so will use its edata_cache.
*/
edata_cache_small_t ecs;
psset_t psset;
/*
* The largest size we'll allocate out of the shard. For those
* allocations refused, the caller (in practice, the PA module) will
* fall back to the more general (for now) PAC, which can always handle
* any allocation request.
*/
size_t alloc_max;
/*
* Slabs currently purged away. They are hugepage-sized and
* hugepage-aligned, but have had pages_nohuge and pages_purge_forced
* called on them.
*
* Guarded by grow_mtx.
*/
hpdata_list_t unused_slabs;
/*
* How many grow operations have occurred.
*
* Guarded by grow_mtx.
*/
uint64_t age_counter;
/*
* Either NULL (if empty), or some integer multiple of a
* hugepage-aligned number of hugepages. We carve them off one at a
* time to satisfy new pageslab requests.
*
* Guarded by grow_mtx.
*/
void *eden;
size_t eden_len;
/* The arena ind we're associated with. */
unsigned ind;
emap_t *emap;
};
/*
* Whether or not the HPA can be used given the current configuration. This is
* is not necessarily a guarantee that it backs its allocations by hugepages,
* just that it can function properly given the system it's running on.
*/
bool hpa_supported();
bool hpa_shard_init(hpa_shard_t *shard, emap_t *emap, base_t *base,
edata_cache_t *edata_cache, unsigned ind, size_t alloc_max);
void hpa_shard_stats_accum(hpa_shard_stats_t *dst, hpa_shard_stats_t *src);
void hpa_shard_stats_merge(tsdn_t *tsdn, hpa_shard_t *shard,
hpa_shard_stats_t *dst);
/*
* Notify the shard that we won't use it for allocations much longer. Due to
* the possibility of races, we don't actually prevent allocations; just flush
* and disable the embedded edata_cache_small.
*/
void hpa_shard_disable(tsdn_t *tsdn, hpa_shard_t *shard);
void hpa_shard_destroy(tsdn_t *tsdn, hpa_shard_t *shard);
/*
* We share the fork ordering with the PA and arena prefork handling; that's why
* these are 3 and 4 rather than 0 and 1.
*/
void hpa_shard_prefork3(tsdn_t *tsdn, hpa_shard_t *shard);
void hpa_shard_prefork4(tsdn_t *tsdn, hpa_shard_t *shard);
void hpa_shard_postfork_parent(tsdn_t *tsdn, hpa_shard_t *shard);
void hpa_shard_postfork_child(tsdn_t *tsdn, hpa_shard_t *shard);
#endif /* JEMALLOC_INTERNAL_HPA_H */