kiper220/mimalloc
1
0
Fork 0
mirror of https://github.com/microsoft/mimalloc.git synced 2025-05-03 22:19:32 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

ensure we dont reclaim a segment on a free if that would go above the target segment count

Browse source
This commit is contained in:
Daan 2024-10-29 22:40:58 -07:00
parent 3f3aee918a
commit 4f46cf7d5a
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/segment.c
View file

@ -1261,6 +1261,8 @@ bool _mi_segment_attempt_reclaim(mi_heap_t* heap, mi_segment_t* segment) {
if (mi_atomic_load_relaxed(&segment->thread_id) != 0) return false; // it is not abandoned if (mi_atomic_load_relaxed(&segment->thread_id) != 0) return false; // it is not abandoned
if (segment->subproc != heap->tld->segments.subproc) return false; // only reclaim within the same subprocess if (segment->subproc != heap->tld->segments.subproc) return false; // only reclaim within the same subprocess
if (!_mi_heap_memid_is_suitable(heap,segment->memid)) return false; // don't reclaim between exclusive and non-exclusive arena's if (!_mi_heap_memid_is_suitable(heap,segment->memid)) return false; // don't reclaim between exclusive and non-exclusive arena's
const long target = _mi_option_get_fast(mi_option_target_segments_per_thread);
if (target > 0 && (size_t)target <= heap->tld->segments.count) return false; // don't reclaim if going above the target count
// don't reclaim more from a `free` call than half the current segments // don't reclaim more from a `free` call than half the current segments
// this is to prevent a pure free-ing thread to start owning too many segments // this is to prevent a pure free-ing thread to start owning too many segments
// (but not for out-of-arena segments as that is the main way to be reclaimed for those) // (but not for out-of-arena segments as that is the main way to be reclaimed for those)