project-base/server-skynet-source-3rd-jemalloc
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refactoring for bits splitting

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This commit is contained in:
Ben Maurer 2014-04-06 13:24:16 -07:00
parent 46c0af68bd
commit f9ff60346d
1 changed files with 40 additions and 36 deletions
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76
src/arena.c
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@ -53,6 +53,22 @@ static void arena_bin_lower_run(arena_t *arena, arena_chunk_t *chunk,
/******************************************************************************/
JEMALLOC_INLINE_C size_t
arena_mapelm_to_pageind(arena_chunk_map_t *mapelm)
{
uintptr_t map_offset =
CHUNK_ADDR2OFFSET(mapelm) - offsetof(arena_chunk_t, map);
return ((map_offset / sizeof(arena_chunk_map_t)) + map_bias);
}
JEMALLOC_INLINE_C size_t
arena_mapelm_to_bits(arena_chunk_map_t *mapelm)
{
return (mapelm->bits);
}
static inline int
arena_run_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
{
@ -73,26 +89,19 @@ static inline int
arena_avail_comp(arena_chunk_map_t *a, arena_chunk_map_t *b)
{
int ret;
size_t a_size = a->bits & ~PAGE_MASK;
size_t b_size = b->bits & ~PAGE_MASK;
size_t a_size;
size_t b_size = arena_mapelm_to_bits(b) & ~PAGE_MASK;
uintptr_t a_mapelm = (uintptr_t)a;
uintptr_t b_mapelm = (uintptr_t)b;
if (a_mapelm & CHUNK_MAP_KEY)
a_size = a_mapelm & ~PAGE_MASK;
else
a_size = arena_mapelm_to_bits(a) & ~PAGE_MASK;
ret = (a_size > b_size) - (a_size < b_size);
if (ret == 0) {
uintptr_t a_mapelm, b_mapelm;
if ((a->bits & CHUNK_MAP_KEY) != CHUNK_MAP_KEY)
a_mapelm = (uintptr_t)a;
else {
/*
* Treat keys as though they are lower than anything
* else.
*/
a_mapelm = 0;
}
b_mapelm = (uintptr_t)b;
if (ret == 0 && (!(a_mapelm & CHUNK_MAP_KEY)))
ret = (a_mapelm > b_mapelm) - (a_mapelm < b_mapelm);
}
return (ret);
}
@ -663,15 +672,14 @@ static arena_run_t *
arena_run_alloc_large_helper(arena_t *arena, size_t size, bool zero)
{
arena_run_t *run;
arena_chunk_map_t *mapelm, key;
arena_chunk_map_t *mapelm;
arena_chunk_map_t *key;
key.bits = size | CHUNK_MAP_KEY;
mapelm = arena_avail_tree_nsearch(&arena->runs_avail, &key);
key = (arena_chunk_map_t *)(size | CHUNK_MAP_KEY);
mapelm = arena_avail_tree_nsearch(&arena->runs_avail, key);
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
size_t pageind = arena_mapelm_to_pageind(mapelm);
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
LG_PAGE));
@ -718,15 +726,14 @@ static arena_run_t *
arena_run_alloc_small_helper(arena_t *arena, size_t size, size_t binind)
{
arena_run_t *run;
arena_chunk_map_t *mapelm, key;
arena_chunk_map_t *mapelm;
arena_chunk_map_t *key;
key.bits = size | CHUNK_MAP_KEY;
mapelm = arena_avail_tree_nsearch(&arena->runs_avail, &key);
key = (arena_chunk_map_t *)(size | CHUNK_MAP_KEY);
mapelm = arena_avail_tree_nsearch(&arena->runs_avail, key);
if (mapelm != NULL) {
arena_chunk_t *run_chunk = CHUNK_ADDR2BASE(mapelm);
size_t pageind = (((uintptr_t)mapelm -
(uintptr_t)run_chunk->map) / sizeof(arena_chunk_map_t))
+ map_bias;
size_t pageind = arena_mapelm_to_pageind(mapelm);
run = (arena_run_t *)((uintptr_t)run_chunk + (pageind <<
LG_PAGE));
@ -897,8 +904,7 @@ arena_chunk_purge_stashed(arena_t *arena, arena_chunk_t *chunk,
bool unzeroed;
size_t flag_unzeroed, i;
pageind = (((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t)) + map_bias;
pageind = arena_mapelm_to_pageind(mapelm);
npages = arena_mapbits_large_size_get(chunk, pageind) >>
LG_PAGE;
assert(pageind + npages <= chunk_npages);
@ -942,8 +948,7 @@ arena_chunk_unstash_purged(arena_t *arena, arena_chunk_t *chunk,
mapelm = ql_first(mapelms)) {
arena_run_t *run;
pageind = (((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t)) + map_bias;
pageind = arena_mapelm_to_pageind(mapelm);
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)(pageind <<
LG_PAGE));
ql_remove(mapelms, mapelm, u.ql_link);
@ -1307,8 +1312,7 @@ arena_bin_runs_first(arena_bin_t *bin)
arena_run_t *run;
chunk = (arena_chunk_t *)CHUNK_ADDR2BASE(mapelm);
pageind = ((((uintptr_t)mapelm - (uintptr_t)chunk->map) /
sizeof(arena_chunk_map_t))) + map_bias;
pageind = arena_mapelm_to_pageind(mapelm);
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
arena_mapbits_small_runind_get(chunk, pageind)) <<
LG_PAGE));
@ -1882,7 +1886,7 @@ arena_dalloc_bin_locked(arena_t *arena, arena_chunk_t *chunk, void *ptr,
run = (arena_run_t *)((uintptr_t)chunk + (uintptr_t)((pageind -
arena_mapbits_small_runind_get(chunk, pageind)) << LG_PAGE));
bin = run->bin;
binind = arena_ptr_small_binind_get(ptr, mapelm->bits);
binind = arena_ptr_small_binind_get(ptr, arena_mapbits_get(chunk, pageind));
bin_info = &arena_bin_info[binind];
if (config_fill || config_stats)
size = bin_info->reg_size;