project-base/server-skynet-source-3rd-jemalloc
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Change CHUNK_MAP_ZEROED to CHUNK_MAP_UNZEROED.

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Invert the chunk map bit that tracks whether a page is zeroed, so that
for zeroed arena chunks, the interior of the page map does not need to
be initialized (as it consists entirely of zero bytes).
This commit is contained in:
Jason Evans
2010-10-01 17:53:37 -07:00
parent 7393f44ff0
commit 3377ffa1f4
2 changed files with 32 additions and 26 deletions
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12
jemalloc/include/jemalloc/internal/arena.h
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@@ -125,13 +125,13 @@ struct arena_chunk_map_s {
* x : don't care
* - : 0
* + : 1
* [DZLA] : bit set
* [dzla] : bit unset
* [DULA] : bit set
* [dula] : bit unset
*
* Unallocated (clean):
* ssssssss ssssssss ssss---- ----dz--
* xxxxxxxx xxxxxxxx xxxx---- -----Zxx
* ssssssss ssssssss ssss---- ----dZ--
* ssssssss ssssssss ssss---- ----du--
* xxxxxxxx xxxxxxxx xxxx---- -----Uxx
* ssssssss ssssssss ssss---- ----dU--
*
* Unallocated (dirty):
* ssssssss ssssssss ssss---- ----D---
@@ -161,7 +161,7 @@ struct arena_chunk_map_s {
#endif
#define CHUNK_MAP_FLAGS_MASK ((size_t)0xfU)
#define CHUNK_MAP_DIRTY ((size_t)0x8U)
#define CHUNK_MAP_ZEROED ((size_t)0x4U)
#define CHUNK_MAP_UNZEROED ((size_t)0x4U)
#define CHUNK_MAP_LARGE ((size_t)0x2U)
#define CHUNK_MAP_ALLOCATED ((size_t)0x1U)
#define CHUNK_MAP_KEY CHUNK_MAP_ALLOCATED