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Finish arena_prof_ctx_set() optimization.

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Delay reading the mapbits until it's unavoidable.
This commit is contained in:
Jason Evans 2013-12-15 22:08:44 -08:00
parent 6e62984ef6
commit 5fbad0902b
1 changed files with 7 additions and 7 deletions
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14
include/jemalloc/internal/arena.h
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@ -889,7 +889,7 @@ JEMALLOC_INLINE void
arena_prof_ctx_set(const void *ptr, size_t usize, prof_ctx_t *ctx)
{
arena_chunk_t *chunk;
size_t pageind, mapbits;
size_t pageind;
cassert(config_prof);
assert(ptr != NULL);
@ -897,17 +897,17 @@ arena_prof_ctx_set(const void *ptr, size_t usize, prof_ctx_t *ctx)
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(ptr);
pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> LG_PAGE;
mapbits = arena_mapbits_get(chunk, pageind);
assert((mapbits & CHUNK_MAP_ALLOCATED) != 0);
assert(arena_mapbits_allocated_get(chunk, pageind) != 0);
if (usize > SMALL_MAXCLASS || (prof_promote &&
((uintptr_t)ctx != (uintptr_t)1U || ((mapbits & CHUNK_MAP_LARGE) !=
0)))) {
assert((mapbits & CHUNK_MAP_LARGE) != 0);
((uintptr_t)ctx != (uintptr_t)1U || arena_mapbits_large_get(chunk,
pageind) != 0))) {
assert(arena_mapbits_large_get(chunk, pageind) != 0);
arena_mapp_get(chunk, pageind)->prof_ctx = ctx;
} else {
assert((mapbits & CHUNK_MAP_LARGE) == 0);
assert(arena_mapbits_large_get(chunk, pageind) == 0);
if (prof_promote == false) {
size_t mapbits = arena_mapbits_get(chunk, pageind);
arena_run_t *run = (arena_run_t *)((uintptr_t)chunk +
(uintptr_t)((pageind - (mapbits >> LG_PAGE)) <<
LG_PAGE));