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Optimizing TSD and thread cache layout.

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1) Re-organize TSD so that frequently accessed fields are closer to the
beginning and more compact.  Assuming 64-bit, the first 2.5 cachelines now
contains everything needed on tcache fast path, expect the tcache struct itself.

2) Re-organize tcache and tbins.  Take lg_fill_div out of tbin, and reduce tbin
to 24 bytes (down from 32). Split tbins into tbins_small and tbins_large, and
place tbins_small close to the beginning.
This commit is contained in:
Qi Wang
2017-04-06 12:35:22 -07:00
committed by Qi Wang
parent 4dec507546
commit 36bd90b962
10 changed files with 189 additions and 103 deletions
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include/jemalloc/internal/arena_externs.h
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@@ -51,7 +51,7 @@ bool arena_muzzy_decay_time_set(tsdn_t *tsdn, arena_t *arena,
void arena_decay(tsdn_t *tsdn, arena_t *arena, bool all);
void arena_reset(tsd_t *tsd, arena_t *arena);
void arena_destroy(tsd_t *tsd, arena_t *arena);
void arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena,
void arena_tcache_fill_small(tsdn_t *tsdn, arena_t *arena, tcache_t *tcache,
tcache_bin_t *tbin, szind_t binind, uint64_t prof_accumbytes);
void arena_alloc_junk_small(void *ptr, const arena_bin_info_t *bin_info,
bool zero);