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Arena: share bin offsets in a global.

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This saves us a cache miss when lookup up the arena bin offset in a remote
arena during tcache flush.  All arenas share the base offset, and so we don't
need to look it up repeatedly for each arena.  Secondarily, it shaves 288 bytes
off the arena on, e.g., x86-64.
This commit is contained in:
David Goldblatt
2021-01-30 15:35:33 -08:00
committed by David Goldblatt
parent 2fcbd18115
commit 3967329813
7 changed files with 50 additions and 49 deletions
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4
src/inspect.c
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@@ -52,11 +52,11 @@ inspect_extent_util_stats_verbose_get(tsdn_t *tsdn, const void *ptr,
assert(*nfree <= *nregs);
assert(*nfree * edata_usize_get(edata) <= *size);
const arena_t *arena = (arena_t *)atomic_load_p(
arena_t *arena = (arena_t *)atomic_load_p(
&arenas[edata_arena_ind_get(edata)], ATOMIC_RELAXED);
assert(arena != NULL);
const unsigned binshard = edata_binshard_get(edata);
bin_t *bin = &arena->bins[szind].bin_shards[binshard];
bin_t *bin = arena_get_bin(arena, szind, binshard);
malloc_mutex_lock(tsdn, &bin->lock);
if (config_stats) {