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SC: Make some key size classes static.

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The largest small class, smallest large class, and largest large class may all
be needed down fast paths; to avoid the risk of touching another cache line, we
can make them available as constants.
This commit is contained in:
David Goldblatt
2018-07-11 16:05:58 -07:00
committed by David Goldblatt
parent 5112d9e5fd
commit 55e5cc1341
18 changed files with 129 additions and 96 deletions
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14
src/large.c
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@@ -28,7 +28,7 @@ large_palloc(tsdn_t *tsdn, arena_t *arena, size_t usize, size_t alignment,
assert(!tsdn_null(tsdn) || arena != NULL);
ausize = sz_sa2u(usize, alignment);
if (unlikely(ausize == 0 || ausize > sc_data_global.large_maxclass)) {
if (unlikely(ausize == 0 || ausize > SC_LARGE_MAXCLASS)) {
return NULL;
}
@@ -221,10 +221,10 @@ large_ralloc_no_move(tsdn_t *tsdn, extent_t *extent, size_t usize_min,
size_t oldusize = extent_usize_get(extent);
/* The following should have been caught by callers. */
assert(usize_min > 0 && usize_max <= sc_data_global.large_maxclass);
assert(usize_min > 0 && usize_max <= SC_LARGE_MAXCLASS);
/* Both allocation sizes must be large to avoid a move. */
assert(oldusize >= sc_data_global.large_minclass
&& usize_max >= sc_data_global.large_minclass);
assert(oldusize >= SC_LARGE_MINCLASS
&& usize_max >= SC_LARGE_MINCLASS);
if (usize_max > oldusize) {
/* Attempt to expand the allocation in-place. */
@@ -278,10 +278,10 @@ large_ralloc(tsdn_t *tsdn, arena_t *arena, void *ptr, size_t usize,
size_t oldusize = extent_usize_get(extent);
/* The following should have been caught by callers. */
assert(usize > 0 && usize <= sc_data_global.large_maxclass);
assert(usize > 0 && usize <= SC_LARGE_MAXCLASS);
/* Both allocation sizes must be large to avoid a move. */
assert(oldusize >= sc_data_global.large_minclass
&& usize >= sc_data_global.large_minclass);
assert(oldusize >= SC_LARGE_MINCLASS
&& usize >= SC_LARGE_MINCLASS);
/* Try to avoid moving the allocation. */
if (!large_ralloc_no_move(tsdn, extent, usize, usize, zero)) {