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add good-fit for allowing larger blocks in smaller segments

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This commit is contained in:
daan 2019-08-09 11:18:38 -07:00
parent 5e56b40fe6
commit 442bad9190
7 changed files with 214 additions and 35 deletions
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9
src/alloc.c
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@ -57,6 +57,7 @@ extern inline void* mi_malloc_small(size_t size) mi_attr_noexcept {
return mi_heap_malloc_small(mi_get_default_heap(), size);
}
// zero initialized small block
void* mi_zalloc_small(size_t size) mi_attr_noexcept {
void* p = mi_malloc_small(size);
@ -71,7 +72,7 @@ extern inline void* mi_heap_malloc(mi_heap_t* heap, size_t size) mi_attr_noexcep
void* p;
if (mi_likely(size <= MI_SMALL_SIZE_MAX)) {
p = mi_heap_malloc_small(heap, size);
}
}
else {
p = _mi_malloc_generic(heap, size);
}
@ -235,11 +236,11 @@ void mi_free(void* p) mi_attr_noexcept
// huge page stat is accounted for in `_mi_page_retire`
#endif
// adjust if it might be an un-aligned block
uintptr_t tid = _mi_thread_id();
if (mi_likely(tid == page->flags.value)) { // local, and not full or aligned
if (mi_likely(tid == page->flags.value)) {
// local, and not full or aligned
mi_block_t* block = (mi_block_t*)p;
mi_block_set_next(page, block, page->local_free); // note: moving this write earlier does not matter for performance
mi_block_set_next(page, block, page->local_free);
page->local_free = block;
page->used--;
if (mi_unlikely(mi_page_all_free(page))) { _mi_page_retire(page); }