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Fix background_thread creation for the oversize_arena.

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Bypassing background thread creation for the oversize_arena used to be an
optimization since that arena had eager purging.  However #2466 changed the
purging policy for the oversize_arena -- specifically it switched to the default
decay time when background_thread is enabled.

This issue is noticable when the number of arenas is low: whenever the total #
of arenas is <= 4 (which is the default max # of background threads), in which
case the purging will be stalled since no background thread is created for the
oversize_arena.
This commit is contained in:
Qi Wang 2024-05-02 12:53:42 -07:00 • committed by Qi Wang
parent 47d69b4eab
commit 8d8379da44
4 changed files with 2 additions and 25 deletions
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include/jemalloc/internal/arena_externs.h
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@ -103,7 +103,6 @@ void arena_nthreads_inc(arena_t *arena, bool internal);
void arena_nthreads_dec(arena_t *arena, bool internal);
arena_t *arena_new(tsdn_t *tsdn, unsigned ind, const arena_config_t *config);
bool arena_init_huge(arena_t *a0);
bool arena_is_huge(unsigned arena_ind);
arena_t *arena_choose_huge(tsd_t *tsd);
bin_t *arena_bin_choose(tsdn_t *tsdn, arena_t *arena, szind_t binind,
unsigned *binshard);