kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-07-07 03:48:42 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

update comments

Browse source
This commit is contained in:
Daan Leijen 2024-03-25 07:35:49 -07:00
parent 7c17c3d33e
commit cc8d89a085
3 changed files with 46 additions and 33 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/page.c
View file

@ -455,7 +455,7 @@ void _mi_page_retire(mi_page_t* page) mi_attr_noexcept {
if mi_likely( /* bsize < MI_MAX_RETIRE_SIZE && */ !mi_page_queue_is_special(pq)) { // not full or huge queue?
if (pq->last==page && pq->first==page) { // the only page in the queue?
mi_stat_counter_increase(_mi_stats_main.page_no_retire,1);
page->retire_expire = 1+(bsize <= MI_SMALL_OBJ_SIZE_MAX ? MI_RETIRE_CYCLES : MI_RETIRE_CYCLES/4);
page->retire_expire = (bsize <= MI_SMALL_OBJ_SIZE_MAX ? MI_RETIRE_CYCLES : MI_RETIRE_CYCLES/4);
mi_heap_t* heap = mi_page_heap(page);
mi_assert_internal(pq >= heap->pages);
const size_t index = pq - heap->pages;

20
src/segment.c
View file

@ -11,7 +11,11 @@ terms of the MIT license. A copy of the license can be found in the file
#include <string.h> // memset
#include <stdio.h>
#define MI_PAGE_HUGE_ALIGN (256*1024)
// -------------------------------------------------------------------
// Segments
// mimalloc pages reside in segments. See `mi_segment_valid` for invariants.
// -------------------------------------------------------------------
static void mi_segment_try_purge(mi_segment_t* segment, bool force, mi_stats_t* stats);
@ -146,10 +150,6 @@ size_t _mi_commit_mask_next_run(const mi_commit_mask_t* cm, size_t* idx) {
/* --------------------------------------------------------------------------------
Segment allocation
If a thread ends, it "abandons" pages with used blocks
and there is an abandoned segment list whose segments can
be reclaimed by still running threads, much like work-stealing.
-------------------------------------------------------------------------------- */
@ -268,10 +268,10 @@ static bool mi_segment_is_valid(mi_segment_t* segment, mi_segments_tld_t* tld) {
mi_assert_internal(slice->slice_offset == 0);
size_t index = mi_slice_index(slice);
size_t maxindex = (index + slice->slice_count >= segment->slice_entries ? segment->slice_entries : index + slice->slice_count) - 1;
if (mi_slice_is_used(slice)) { // a page in use, we need at least MAX_SLICE_OFFSET valid back offsets
if (mi_slice_is_used(slice)) { // a page in use, we need at least MAX_SLICE_OFFSET_COUNT valid back offsets
used_count++;
if (segment->kind == MI_SEGMENT_HUGE) { mi_assert_internal(slice->is_huge); }
for (size_t i = 0; i <= MI_MAX_SLICE_OFFSET && index + i <= maxindex; i++) {
mi_assert_internal(slice->is_huge == (segment->kind == MI_SEGMENT_HUGE));
for (size_t i = 0; i <= MI_MAX_SLICE_OFFSET_COUNT && index + i <= maxindex; i++) {
mi_assert_internal(segment->slices[index + i].slice_offset == i*sizeof(mi_slice_t));
mi_assert_internal(i==0 || segment->slices[index + i].slice_count == 0);
mi_assert_internal(i==0 || segment->slices[index + i].block_size == 1);
@ -720,9 +720,9 @@ static mi_page_t* mi_segment_span_allocate(mi_segment_t* segment, size_t slice_i
mi_page_t* page = mi_slice_to_page(slice);
mi_assert_internal(mi_page_block_size(page) == bsize);
// set slice back pointers for the first MI_MAX_SLICE_OFFSET entries
// set slice back pointers for the first MI_MAX_SLICE_OFFSET_COUNT entries
size_t extra = slice_count-1;
if (extra > MI_MAX_SLICE_OFFSET) extra = MI_MAX_SLICE_OFFSET;
if (extra > MI_MAX_SLICE_OFFSET_COUNT) extra = MI_MAX_SLICE_OFFSET_COUNT;
if (slice_index + extra >= segment->slice_entries) extra = segment->slice_entries - slice_index - 1; // huge objects may have more slices than avaiable entries in the segment->slices
mi_slice_t* slice_next = slice + 1;