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Better handle burst allocation on tcache_alloc_small_hard

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Shirui Cheng 2024-08-22 14:50:08 -07:00 • committed by Qi Wang
parent 0c88be9e0a
commit 7c99686165
3 changed files with 104 additions and 15 deletions
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10
include/jemalloc/internal/cache_bin.h
View file

@ -600,6 +600,16 @@ cache_bin_nitems_get_remote(cache_bin_t *bin, cache_bin_sz_t *ncached,
*/
}
/*
* For small bins, used to calculate how many items to fill at a time.
* The final nfill is calculated by (ncached_max >> (base - offset)).
*/
typedef struct cache_bin_fill_ctl_s cache_bin_fill_ctl_t;
struct cache_bin_fill_ctl_s {
uint8_t base;
uint8_t offset;
};
/*
* Limit how many items can be flushed in a batch (Which is the upper bound
* for the nflush parameter in tcache_bin_flush_impl()).

4
include/jemalloc/internal/tcache_structs.h
View file

@ -39,8 +39,8 @@ struct tcache_slow_s {
szind_t next_gc_bin;
szind_t next_gc_bin_small;
szind_t next_gc_bin_large;
/* For small bins, fill (ncached_max >> lg_fill_div). */
uint8_t lg_fill_div[SC_NBINS];
/* For small bins, help determine how many items to fill at a time. */
cache_bin_fill_ctl_t bin_fill_ctl_do_not_access_directly[SC_NBINS];
/* For small bins, whether has been refilled since last GC. */
bool bin_refilled[SC_NBINS];
/*