romenskiy2012/jemalloc
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Use the flat bitmap for eset and psset bitmaps.

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This is simpler (note that the eset field comment was actually incorrect!), and
slightly faster.
This commit is contained in:
David Goldblatt 2021-02-08 11:04:46 -08:00 • committed by David Goldblatt
parent 271a676dcd
commit 154aa5fcc1
4 changed files with 21 additions and 27 deletions
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11
src/psset.c
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@ -5,15 +5,12 @@
#include "jemalloc/internal/flat_bitmap.h"
static const bitmap_info_t psset_bitmap_info =
BITMAP_INFO_INITIALIZER(PSSET_NPSIZES);
void
psset_init(psset_t *psset) {
for (unsigned i = 0; i < PSSET_NPSIZES; i++) {
hpdata_age_heap_new(&psset->pageslabs[i]);
}
bitmap_init(psset->bitmap, &psset_bitmap_info, /* fill */ true);
fb_init(psset->bitmap, PSSET_NPSIZES);
memset(&psset->merged_stats, 0, sizeof(psset->merged_stats));
memset(&psset->stats, 0, sizeof(psset->stats));
hpdata_empty_list_init(&psset->empty);
@ -101,14 +98,14 @@ static void
psset_hpdata_heap_remove(psset_t *psset, pszind_t pind, hpdata_t *ps) {
hpdata_age_heap_remove(&psset->pageslabs[pind], ps);
if (hpdata_age_heap_empty(&psset->pageslabs[pind])) {
bitmap_set(psset->bitmap, &psset_bitmap_info, (size_t)pind);
fb_unset(psset->bitmap, PSSET_NPSIZES, (size_t)pind);
}
}
static void
psset_hpdata_heap_insert(psset_t *psset, pszind_t pind, hpdata_t *ps) {
if (hpdata_age_heap_empty(&psset->pageslabs[pind])) {
bitmap_unset(psset->bitmap, &psset_bitmap_info, (size_t)pind);
fb_set(psset->bitmap, PSSET_NPSIZES, (size_t)pind);
}
hpdata_age_heap_insert(&psset->pageslabs[pind], ps);
}
@ -266,7 +263,7 @@ psset_pick_alloc(psset_t *psset, size_t size) {
assert(size <= HUGEPAGE);
pszind_t min_pind = sz_psz2ind(sz_psz_quantize_ceil(size));
pszind_t pind = (pszind_t)bitmap_ffu(psset->bitmap, &psset_bitmap_info,
pszind_t pind = (pszind_t)fb_ffs(psset->bitmap, PSSET_NPSIZES,
(size_t)min_pind);
if (pind == PSSET_NPSIZES) {
return hpdata_empty_list_first(&psset->empty);