AuroraMiddleware/mimalloc
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use more conservative retire strategy

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This commit is contained in:
daan 2019-10-28 14:12:06 -07:00
parent 081e2d1eb6
commit 87bdfbb9b6
1 changed files with 6 additions and 4 deletions
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10
src/page.c
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@ -407,16 +407,18 @@ void _mi_page_retire(mi_page_t* page) {
// (or we end up retiring and re-allocating most of the time)
// NOTE: refine this more: we should not retire if this
// is the only page left with free blocks. It is not clear
// how to check this efficiently though... for now we just check
// if its neighbours are almost fully used.
// how to check this efficiently though...
// for now, we don't retire if it is the only page left of this size class.
mi_page_queue_t* pq = mi_page_queue_of(page);
if (mi_likely(page->block_size <= (MI_SMALL_SIZE_MAX/4))) {
if (mi_page_mostly_used(page->prev) && mi_page_mostly_used(page->next)) {
// if (mi_page_mostly_used(page->prev) && mi_page_mostly_used(page->next)) {
if (pq->last==page && pq->first==page) {
mi_stat_counter_increase(_mi_stats_main.page_no_retire,1);
return; // dont't retire after all
}
}
_mi_page_free(page, mi_page_queue_of(page), false);
_mi_page_free(page, pq, false);
}