Mercurial > hg > graal-compiler
diff src/share/vm/runtime/globals.hpp @ 534:5cfd8d19e546
6786503: Overflow list performance can be improved
Summary: Avoid overflow list walk in CMS & ParNew when it is unnecessary. Fix a couple of correctness issues, including a C-heap leak, in ParNew at the intersection of promotion failure, work queue overflow and object array chunking. Add stress testing option and related assertion checking.
Reviewed-by: jmasa
| author | ysr |
|---|---|
| date | Mon, 26 Jan 2009 12:47:21 -0800 |
| parents | c81d2ef51ca3 |
| children | 23673011938d |
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--- a/src/share/vm/runtime/globals.hpp Wed Jan 21 13:40:10 2009 -0800 +++ b/src/share/vm/runtime/globals.hpp Mon Jan 26 12:47:21 2009 -0800 @@ -1307,7 +1307,14 @@ product(intx, ParGCArrayScanChunk, 50, \ "Scan a subset and push remainder, if array is bigger than this") \ \ - product(intx, ParGCDesiredObjsFromOverflowList, 20, \ + notproduct(bool, ParGCWorkQueueOverflowALot, false, \ + "Whether we should simulate work queue overflow in ParNew") \ + \ + notproduct(uintx, ParGCWorkQueueOverflowInterval, 1000, \ + "An `interval' counter that determines how frequently" \ + " we simulate overflow; a smaller number increases frequency") \ + \ + product(uintx, ParGCDesiredObjsFromOverflowList, 20, \ "The desired number of objects to claim from the overflow list") \ \ product(uintx, CMSParPromoteBlocksToClaim, 50, \ @@ -1429,8 +1436,8 @@ "Whether we should simulate frequent marking stack / work queue" \ " overflow") \ \ - notproduct(intx, CMSMarkStackOverflowInterval, 1000, \ - "A per-thread `interval' counter that determines how frequently" \ + notproduct(uintx, CMSMarkStackOverflowInterval, 1000, \ + "An `interval' counter that determines how frequently" \ " we simulate overflow; a smaller number increases frequency") \ \ product(uintx, CMSMaxAbortablePrecleanLoops, 0, \ @@ -1648,7 +1655,7 @@ develop(uintx, WorkStealingYieldsBeforeSleep, 1000, \ "Number of yields before a sleep is done during workstealing") \ \ - product(uintx, PreserveMarkStackSize, 40, \ + product(uintx, PreserveMarkStackSize, 1024, \ "Size for stack used in promotion failure handling") \ \ product_pd(bool, UseTLAB, "Use thread-local object allocation") \