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Rework the bin locking around tcache refill / flush.

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Previously, tcache fill/flush (as well as small alloc/dalloc on the arena) may
potentially drop the bin lock for slab_alloc and slab_dalloc.  This commit
refactors the logic so that the slab calls happen in the same function / level
as the bin lock / unlock.  The main purpose is to be able to use flat combining
without having to keep track of stack state.

In the meantime, this change reduces the locking, especially for slab_dalloc
calls, where nothing happens after the call.
This commit is contained in:
Qi Wang
2020-02-07 14:53:36 -08:00
committed by Qi Wang
parent 7fd22f7b2e
commit ba0e35411c
3 changed files with 259 additions and 194 deletions
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3
include/jemalloc/internal/arena_externs.h
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@@ -63,8 +63,9 @@ void *arena_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize,
void arena_prof_promote(tsdn_t *tsdn, void *ptr, size_t usize);
void arena_dalloc_promoted(tsdn_t *tsdn, void *ptr, tcache_t *tcache,
bool slow_path);
void arena_dalloc_bin_junked_locked(tsdn_t *tsdn, arena_t *arena, bin_t *bin,
bool arena_dalloc_bin_junked_locked(tsdn_t *tsdn, arena_t *arena, bin_t *bin,
szind_t binind, edata_t *edata, void *ptr);
void arena_slab_dalloc(tsdn_t *tsdn, arena_t *arena, edata_t *slab);
void arena_dalloc_small(tsdn_t *tsdn, void *ptr);
bool arena_ralloc_no_move(tsdn_t *tsdn, void *ptr, size_t oldsize, size_t size,
size_t extra, bool zero, size_t *newsize);