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remove reset_decommits option

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This commit is contained in:
daan 2019-11-11 09:46:02 -08:00
parent d2279b2a3f
commit 83a066fd2d
4 changed files with 19 additions and 39 deletions
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28
src/memory.c
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@ -350,12 +350,12 @@ void _mi_mem_free(void* p, size_t size, size_t id, mi_stats_t* stats) {
mi_assert_internal(size <= MI_REGION_MAX_OBJ_SIZE); if (size > MI_REGION_MAX_OBJ_SIZE) return;
// we can align the size up to page size (as we allocate that way too)
// this ensures we fully commit/decommit/reset
size = _mi_align_up(size, _mi_os_page_size());
const size_t blocks = mi_region_block_count(size);
size = _mi_align_up(size, _mi_os_page_size());
const size_t blocks = mi_region_block_count(size);
mi_region_info_t info = mi_atomic_read(&region->info);
bool is_large;
bool is_eager_committed;
void* start = mi_region_info_read(info,&is_large,&is_eager_committed);
bool is_committed;
void* start = mi_region_info_read(info, &is_large, &is_committed);
mi_assert_internal(start != NULL);
void* blocks_start = (uint8_t*)start + (bit_idx * MI_SEGMENT_SIZE);
mi_assert_internal(blocks_start == p); // not a pointer in our area?
@ -366,18 +366,14 @@ void _mi_mem_free(void* p, size_t size, size_t id, mi_stats_t* stats) {
// TODO: implement delayed decommit/reset as these calls are too expensive
// if the memory is reused soon.
// reset: 10x slowdown on malloc-large, decommit: 17x slowdown on malloc-large
if (!is_large) {
if (mi_option_is_enabled(mi_option_segment_reset)) {
if (!is_eager_committed && // cannot reset large pages
(mi_option_is_enabled(mi_option_eager_commit) || // cannot reset halfway committed segments, use `option_page_reset` instead
mi_option_is_enabled(mi_option_reset_decommits))) // but we can decommit halfway committed segments
{
_mi_os_reset(p, size, stats);
//_mi_os_decommit(p, size, stats); // todo: and clear dirty bits?
}
}
}
if (!is_eager_committed) {
if (!is_large &&
mi_option_is_enabled(mi_option_segment_reset) &&
mi_option_is_enabled(mi_option_eager_commit)) // cannot reset halfway committed segments, use `option_page_reset` instead
{
_mi_os_reset(p, size, stats);
//_mi_os_decommit(p, size, stats); // todo: and clear dirty bits?
}
if (!is_committed) {
// adjust commit statistics as we commit again when re-using the same slot
_mi_stat_decrease(&stats->committed, mi_good_commit_size(size));
}