archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-23 20:44:41 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

8062943: REDO - Parallelize clearing the next mark bitmap

Browse source 
Reviewed-by: kbarrett, tschatzl
This commit is contained in:
Marcus Larsson 2014-11-25 11:59:55 +01:00
parent 561b51f5ce
commit 89dca54c74
6 changed files with 44 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

28
hotspot/src/share/vm/gc_implementation/g1/concurrentMark.cpp
View file

@ -180,9 +180,32 @@ class ClearBitmapHRClosure : public HeapRegionClosure {
}
};
class ParClearNextMarkBitmapTask : public AbstractGangTask {
ClearBitmapHRClosure* _cl;
HeapRegionClaimer _hrclaimer;
bool _suspendible; // If the task is suspendible, workers must join the STS.
public:
ParClearNextMarkBitmapTask(ClearBitmapHRClosure *cl, uint n_workers, bool suspendible) :
_cl(cl), _suspendible(suspendible), AbstractGangTask("Parallel Clear Bitmap Task"), _hrclaimer(n_workers) {}
void work(uint worker_id) {
if (_suspendible) {
SuspendibleThreadSet::join();
}
G1CollectedHeap::heap()->heap_region_par_iterate(_cl, worker_id, &_hrclaimer, true);
if (_suspendible) {
SuspendibleThreadSet::leave();
}
}
};
void CMBitMap::clearAll() {
G1CollectedHeap* g1h = G1CollectedHeap::heap();
ClearBitmapHRClosure cl(NULL, this, false /* may_yield */);
G1CollectedHeap::heap()->heap_region_iterate(&cl);
uint n_workers = g1h->workers()->active_workers();
ParClearNextMarkBitmapTask task(&cl, n_workers, false);
g1h->workers()->run_task(&task);
guarantee(cl.complete(), "Must have completed iteration.");
return;
}
@ -861,7 +884,8 @@ void ConcurrentMark::clearNextBitmap() {
guarantee(!g1h->mark_in_progress(), "invariant");
ClearBitmapHRClosure cl(this, _nextMarkBitMap, true /* may_yield */);
g1h->heap_region_iterate(&cl);
ParClearNextMarkBitmapTask task(&cl, parallel_marking_threads(), true);
_parallel_workers->run_task(&task);
// Clear the liveness counting data. If the marking has been aborted, the abort()
// call already did that.