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This commit is contained in:
Jason Evans 2012-05-10 00:18:46 -07:00
parent 80fe0478e6
commit 53bd42c1fe
1 changed files with 9 additions and 9 deletions
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18
include/jemalloc/internal/arena.h
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@ -93,13 +93,13 @@ struct arena_chunk_map_s {
* Run address (or size) and various flags are stored together. The bit
* layout looks like (assuming 32-bit system):
*
* ???????? ???????? ????---- ----dula
* ???????? ???????? ????nnnn nnnndula
*
* ? : Unallocated: Run address for first/last pages, unset for internal
* pages.
* Small: Run page offset.
* Large: Run size for first page, unset for trailing pages.
* - : Unused.
* n : binind for small size class, BININD_INVALID for large size class.
* d : dirty?
* u : unzeroed?
* l : large?
@ -118,14 +118,14 @@ struct arena_chunk_map_s {
* [dula] : bit unset
*
* Unallocated (clean):
* ssssssss ssssssss ssss1111 1111du-a
* ssssssss ssssssss ssss++++ ++++du-a
* xxxxxxxx xxxxxxxx xxxxxxxx xxxx-Uxx
* ssssssss ssssssss ssss1111 1111dU-a
* ssssssss ssssssss ssss++++ ++++dU-a
*
* Unallocated (dirty):
* ssssssss ssssssss ssss1111 1111D--a
* ssssssss ssssssss ssss++++ ++++D--a
* xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
* ssssssss ssssssss ssss1111 1111D--a
* ssssssss ssssssss ssss++++ ++++D--a
*
* Small:
* pppppppp pppppppp ppppnnnn nnnnd--A
@ -133,15 +133,15 @@ struct arena_chunk_map_s {
* pppppppp pppppppp ppppnnnn nnnnd--A
*
* Large:
* ssssssss ssssssss ssss1111 1111D-LA
* ssssssss ssssssss ssss++++ ++++D-LA
* xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
* -------- -------- ----1111 1111D-LA
* -------- -------- ----++++ ++++D-LA
*
* Large (sampled, size <= PAGE):
* ssssssss ssssssss ssssnnnn nnnnD-LA
*
* Large (not sampled, size == PAGE):
* ssssssss ssssssss ssss1111 1111D-LA
* ssssssss ssssssss ssss++++ ++++D-LA
*/
size_t bits;
#define CHUNK_MAP_BININD_SHIFT 4