// This method contains all heap specific policy for invoking mark sweep.
// PSMarkSweep::invoke_no_policy() will only attempt to mark-sweep-compact
// the heap. It will do nothing further. If we need to bail out for policy
// reasons, scavenge before full gc, or any other specialized behavior, it
// needs to be added here.
//
// Note that this method should only be called from the vm_thread while
// at a safepoint!
void PSMarkSweep::invoke(bool maximum_heap_compaction) {
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
assert(!Universe::heap()->is_gc_active(), "not reentrant");
ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
GCCause::Cause gc_cause = heap->gc_cause();
PSAdaptiveSizePolicy* policy = heap->size_policy();
// Before each allocation/collection attempt, find out from the
// policy object if GCs are, on the whole, taking too long. If so,
// bail out without attempting a collection. The exceptions are
// for explicitly requested GC's.
if (!policy->gc_time_limit_exceeded() ||
GCCause::is_user_requested_gc(gc_cause) ||
GCCause::is_serviceability_requested_gc(gc_cause)) {
IsGCActiveMark mark;
if (ScavengeBeforeFullGC) {
PSScavenge::invoke_no_policy();
}
int count = (maximum_heap_compaction)?1:MarkSweepAlwaysCompactCount;
IntFlagSetting flag_setting(MarkSweepAlwaysCompactCount, count);
PSMarkSweep::invoke_no_policy(maximum_heap_compaction);
}
}
void PSMarkSweep::invoke(bool maximum_heap_compaction) {
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
assert(!ParallelScavengeHeap::heap()->is_gc_active(), "not reentrant");
ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();
GCCause::Cause gc_cause = heap->gc_cause();
PSAdaptiveSizePolicy* policy = heap->size_policy();
IsGCActiveMark mark;
if (ScavengeBeforeFullGC) {
PSScavenge::invoke_no_policy();
}
const bool clear_all_soft_refs =
heap->collector_policy()->should_clear_all_soft_refs();
uint count = maximum_heap_compaction ? 1 : MarkSweepAlwaysCompactCount;
UIntFlagSetting flag_setting(MarkSweepAlwaysCompactCount, count);
PSMarkSweep::invoke_no_policy(clear_all_soft_refs || maximum_heap_compaction);
}
// This method contains all heap specific policy for invoking mark sweep.
// PSMarkSweep::invoke_no_policy() will only attempt to mark-sweep-compact
// the heap. It will do nothing further. If we need to bail out for policy
// reasons, scavenge before full gc, or any other specialized behavior, it
// needs to be added here.
//
// Note that this method should only be called from the vm_thread while
// at a safepoint!
void PSMarkSweep::invoke(bool& notify_ref_lock, bool maximum_heap_compaction) {
assert(SafepointSynchronize::is_at_safepoint(), "should be at safepoint");
assert(Thread::current() == (Thread*)VMThread::vm_thread(), "should be in vm thread");
assert(!Universe::heap()->is_gc_active(), "not reentrant");
AdaptiveSizePolicy* policy = ParallelScavengeHeap::size_policy();
// Before each allocation/collection attempt, find out from the
// policy object if GCs are, on the whole, taking too long. If so,
// bail out without attempting a collection.
if (!policy->gc_time_limit_exceeded()) {
IsGCActiveMark mark;
if (ScavengeBeforeFullGC) {
PSScavenge::invoke_no_policy(notify_ref_lock);
}
int count = (maximum_heap_compaction)?1:MarkSweepAlwaysCompactCount;
IntFlagSetting flag_setting(MarkSweepAlwaysCompactCount, count);
PSMarkSweep::invoke_no_policy(notify_ref_lock, maximum_heap_compaction);
}
}
