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Store the bin shard selection in TSD.

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This avoids having to choose bin shard on the fly, also will allow flexible bin
binding for each thread.
This commit is contained in:
Qi Wang 2018-11-27 12:38:47 -08:00 • committed by Qi Wang
parent 45bb4483ba
commit 98b56ab23d
5 changed files with 30 additions and 10 deletions
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3
src/arena.c
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@ -1349,8 +1349,7 @@ arena_bin_choose_lock(tsdn_t *tsdn, arena_t *arena, szind_t binind,
if (tsdn_null(tsdn) || tsd_arena_get(tsdn_tsd(tsdn)) == NULL) {
*binshard = 0;
} else {
*binshard = tsd_binshard_get(tsdn_tsd(tsdn)) %
bin_infos[binind].n_shards;
*binshard = tsd_binshardsp_get(tsdn_tsd(tsdn))->binshard[binind];
}
assert(*binshard < bin_infos[binind].n_shards);
bin = &arena->bins[binind].bin_shards[*binshard];

11
src/jemalloc.c
View file

@ -379,9 +379,14 @@ arena_bind(tsd_t *tsd, unsigned ind, bool internal) {
tsd_iarena_set(tsd, arena);
} else {
tsd_arena_set(tsd, arena);
unsigned binshard = atomic_fetch_add_u(&arena->binshard_next, 1,
ATOMIC_RELAXED) % BIN_SHARDS_MAX;
tsd_binshard_set(tsd, binshard);
unsigned shard = atomic_fetch_add_u(&arena->binshard_next, 1,
ATOMIC_RELAXED);
tsd_binshards_t *bins = tsd_binshardsp_get(tsd);
for (unsigned i = 0; i < SC_NBINS; i++) {
assert(bin_infos[i].n_shards > 0 &&
bin_infos[i].n_shards <= BIN_SHARDS_MAX);
bins->binshard[i] = shard % bin_infos[i].n_shards;
}
}
}