Mercurial > hg > graal-jvmci-8
diff src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 20302:3bf2fc51186b
8048085: Aborting marking just before remark results in useless additional clearing of the next mark bitmap
Summary: Skip clearing the next bitmap if we just recently aborted since the full GC already clears this bitmap.
Reviewed-by: brutisso
| author | tschatzl |
|---|---|
| date | Mon, 21 Jul 2014 09:59:46 +0200 |
| parents | f3aeae1f9fc5 |
| children | e02e18f40eae |
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--- a/src/share/vm/gc_implementation/g1/concurrentMark.cpp Mon Jul 21 09:59:37 2014 +0200 +++ b/src/share/vm/gc_implementation/g1/concurrentMark.cpp Mon Jul 21 09:59:46 2014 +0200 @@ -890,6 +890,10 @@ guarantee(!g1h->mark_in_progress(), "invariant"); } +bool ConcurrentMark::nextMarkBitmapIsClear() { + return _nextMarkBitMap->getNextMarkedWordAddress(_heap_start, _heap_end) == _heap_end; +} + class NoteStartOfMarkHRClosure: public HeapRegionClosure { public: bool doHeapRegion(HeapRegion* r) { @@ -3358,7 +3362,8 @@ // abandon current marking iteration due to a Full GC void ConcurrentMark::abort() { - // Clear all marks to force marking thread to do nothing + // Clear all marks in the next bitmap for the next marking cycle. This will allow us to skip the next + // concurrent bitmap clearing. _nextMarkBitMap->clearAll(); // Clear the liveness counting data clear_all_count_data();