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Fast-path improvement: reduce # of branches and unnecessary operations.

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- Combine multiple runtime branches into a single malloc_slow check.
- Avoid calling arena_choose / size2index / index2size on fast path.
- A few micro optimizations.
This commit is contained in:
Qi Wang 2015-10-27 15:12:10 -07:00 • committed by Jason Evans
parent 710ca112e3
commit f4a0f32d34
11 changed files with 357 additions and 214 deletions
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6
src/huge.c
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@ -75,7 +75,7 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t size, size_t alignment,
arena = arena_choose(tsd, arena);
if (unlikely(arena == NULL) || (ret = arena_chunk_alloc_huge(arena,
size, alignment, &is_zeroed)) == NULL) {
idalloctm(tsd, node, tcache, true);
idalloctm(tsd, node, tcache, true, true);
return (NULL);
}
@ -83,7 +83,7 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t size, size_t alignment,
if (huge_node_set(ret, node)) {
arena_chunk_dalloc_huge(arena, ret, size);
idalloctm(tsd, node, tcache, true);
idalloctm(tsd, node, tcache, true, true);
return (NULL);
}
@ -372,7 +372,7 @@ huge_dalloc(tsd_t *tsd, void *ptr, tcache_t *tcache)
extent_node_size_get(node));
arena_chunk_dalloc_huge(extent_node_arena_get(node),
extent_node_addr_get(node), extent_node_size_get(node));
idalloctm(tsd, node, tcache, true);
idalloctm(tsd, node, tcache, true, true);
}
arena_t *