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8242041: Shenandoah: adaptive heuristics should account evac reserve in free target

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Reviewed-by: rkennke
This commit is contained in:
Aleksey Shipilev 2020-04-02 20:11:01 +02:00
parent 6570425dc4
commit 487070cc09
2 changed files with 5 additions and 4 deletions
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4
src/hotspot/share/gc/shenandoah/heuristics/shenandoahAdaptiveHeuristics.cpp
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@ -60,9 +60,9 @@ void ShenandoahAdaptiveHeuristics::choose_collection_set_from_regiondata(Shenand
// ShenandoahGarbageThreshold is the soft threshold which would be ignored until min_garbage is hit.
size_t capacity = ShenandoahHeap::heap()->max_capacity();
size_t free_target = capacity / 100 * ShenandoahMinFreeThreshold;
size_t min_garbage = free_target > actual_free ? (free_target - actual_free) : 0;
size_t max_cset = (size_t)((1.0 * capacity / 100 * ShenandoahEvacReserve) / ShenandoahEvacWaste);
size_t free_target = (capacity / 100 * ShenandoahMinFreeThreshold) + max_cset;
size_t min_garbage = (free_target > actual_free ? (free_target - actual_free) : 0);
log_info(gc, ergo)("Adaptive CSet Selection. Target Free: " SIZE_FORMAT "%s, Actual Free: "
SIZE_FORMAT "%s, Max CSet: " SIZE_FORMAT "%s, Min Garbage: " SIZE_FORMAT "%s",

5
src/hotspot/share/gc/shenandoah/heuristics/shenandoahTraversalHeuristics.cpp
View File

@ -100,9 +100,10 @@ void ShenandoahTraversalHeuristics::choose_collection_set(ShenandoahCollectionSe
size_t capacity = heap->max_capacity();
size_t actual_free = heap->free_set()->available();
size_t free_target = capacity / 100 * ShenandoahMinFreeThreshold;
size_t min_garbage = free_target > actual_free ? (free_target - actual_free) : 0;
size_t max_cset = (size_t)((1.0 * capacity / 100 * ShenandoahEvacReserve) / ShenandoahEvacWaste);
size_t free_target = (capacity / 100 * ShenandoahMinFreeThreshold) + max_cset;
size_t min_garbage = free_target > actual_free ? (free_target - actual_free) : 0;
log_info(gc, ergo)("Adaptive CSet Selection. Target Free: " SIZE_FORMAT "%s, Actual Free: "
SIZE_FORMAT "%s, Max CSet: " SIZE_FORMAT "%s, Min Garbage: " SIZE_FORMAT "%s",