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8243323: Shenandoah: Recycle immediate garbage before concurrent class unloading

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Reviewed-by: shade
This commit is contained in:
Zhengyu Gu 2020-04-22 17:59:59 -04:00
parent 82e43b2527
commit 58e284c017
4 changed files with 100 additions and 19 deletions
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12
src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp
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@ -26,12 +26,13 @@
#include "gc/shenandoah/shenandoahConcurrentMark.inline.hpp"
#include "gc/shenandoah/shenandoahCollectorPolicy.hpp"
#include "gc/shenandoah/shenandoahControlThread.hpp"
#include "gc/shenandoah/shenandoahFreeSet.hpp"
#include "gc/shenandoah/shenandoahPhaseTimings.hpp"
#include "gc/shenandoah/shenandoahHeap.inline.hpp"
#include "gc/shenandoah/shenandoahHeuristics.hpp"
#include "gc/shenandoah/shenandoahMonitoringSupport.hpp"
#include "gc/shenandoah/shenandoahControlThread.hpp"
#include "gc/shenandoah/shenandoahRootProcessor.inline.hpp"
#include "gc/shenandoah/shenandoahUtils.hpp"
#include "gc/shenandoah/shenandoahVMOperations.hpp"
#include "gc/shenandoah/shenandoahWorkerPolicy.hpp"
@ -347,7 +348,9 @@ void ShenandoahControlThread::service_concurrent_normal_cycle(GCCause::Cause cau
heap->vmop_entry_final_mark();
// Process weak roots that might still point to regions that would be broken by cleanup
heap->entry_weak_roots();
if (heap->is_concurrent_weak_root_in_progress()) {
heap->entry_weak_roots();
}
// Final mark might have reclaimed some immediate garbage, kick cleanup to reclaim
// the space. This would be the last action if there is nothing to evacuate.
@ -358,6 +361,11 @@ void ShenandoahControlThread::service_concurrent_normal_cycle(GCCause::Cause cau
heap->free_set()->log_status();
}
// Perform concurrent class unloading
if (heap->is_concurrent_weak_root_in_progress()) {
heap->entry_class_unloading();
}
// Processing strong roots
// This may be skipped if there is nothing to update/evacuate.
// If so, strong_root_in_progress would be unset.