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call page_free_collect less often from a page search

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daanx 2025-02-04 20:15:38 -08:00
parent 54c90fcac4
commit df172843d1
1 changed files with 9 additions and 7 deletions
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16
src/page.c
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@ -175,7 +175,7 @@ static void mi_page_thread_free_collect(mi_page_t* page)
mi_thread_free_t tfree = mi_atomic_load_relaxed(&page->xthread_free);
do {
head = mi_tf_block(tfree);
if (head == NULL) return; // return if the list is empty
if mi_likely(head == NULL) return; // return if the list is empty
tfreex = mi_tf_create(NULL,mi_tf_is_owned(tfree)); // set the thread free list to NULL
} while (!mi_atomic_cas_weak_acq_rel(&page->xthread_free, &tfree, tfreex)); // release is enough?
mi_assert_internal(head != NULL);
@ -717,14 +717,16 @@ static mi_decl_noinline mi_page_t* mi_page_queue_find_free_ex(mi_heap_t* heap, m
count++;
#endif
candidate_limit--;
// collect freed blocks by us and other threads
_mi_page_free_collect(page, false);
// search up to N pages for a best candidate
// is the local free list non-empty?
const bool immediate_available = mi_page_immediate_available(page);
bool immediate_available = mi_page_immediate_available(page);
if (!immediate_available) {
// collect freed blocks by us and other threads to we get a proper use count
_mi_page_free_collect(page, false);
immediate_available = mi_page_immediate_available(page);
}
// if the page is completely full, move it to the `mi_pages_full`
// queue so we don't visit long-lived pages too often.
@ -742,7 +744,7 @@ static mi_decl_noinline mi_page_t* mi_page_queue_find_free_ex(mi_heap_t* heap, m
page_candidate = page;
candidate_limit = _mi_option_get_fast(mi_option_page_max_candidates);
}
else if (mi_page_all_free(page_candidate)) {
else if (mi_page_all_free(page_candidate)) {
_mi_page_free(page_candidate, pq);
page_candidate = page;
}