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fix: Limit allocation-bias update to the Mutator partition

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This commit is contained in:
Xiaolong Peng 2026-06-03 09:15:36 -07:00
parent e972be7793
commit ca0c2ffa27
1 changed files with 5 additions and 1 deletions
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6
src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
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@ -351,7 +351,11 @@ size_t ShenandoahFreeSet::retire_region(ShenandoahFreeSetPartitionId partition,
template<ShenandoahFreeSetPartitionId PARTITION>
ShenandoahHeapRegion* ShenandoahFreeSet::find_region_for_alloc(size_t min_size_words, bool& in_new_region) {
shenandoah_assert_heaplocked();
update_allocation_bias();
// Allocation bias is a Mutator-only heuristic; updating it for collector allocations would
// perturb mutator placement and burn down the shared bias weight.
if constexpr (PARTITION == ShenandoahFreeSetPartitionId::Mutator) {
update_allocation_bias();
}
if (_partitions.is_empty(PARTITION)) {
return nullptr;