Mercurial > hg > truffle
diff src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 1166:7b0e9cba0307
6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc
author | ysr |
---|---|
date | Wed, 13 Jan 2010 15:26:39 -0800 |
parents | ed52bcc32739 |
children | 34fb2662f6c2 |
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--- a/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp Tue Jan 12 14:56:46 2010 -0800 +++ b/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp Wed Jan 13 15:26:39 2010 -0800 @@ -1007,6 +1007,10 @@ return true; } + virtual bool card_mark_must_follow_store() const { + return true; + } + bool is_in_young(oop obj) { HeapRegion* hr = heap_region_containing(obj); return hr != NULL && hr->is_young();