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diff src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp @ 2038:74ee0db180fa

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6807801: CMS: could save/restore fewer header words during scavenge Summary: Age bits need not enter the mark-word preservation calculus; also affected, in addition to CMS, per CR synopsis above, were ParNew (but not DefNew), ParallelScavenge and G1, albeit to a lesser degree than CMS. Reviewed-by: tonyp, johnc
author ysr
date Fri, 17 Dec 2010 23:41:31 -0800
parents f95d63e2154a
children 92da084fefc9
line wrap: on
line diff
--- a/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	Fri Dec 17 11:26:53 2010 -0800
+++ b/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp	Fri Dec 17 23:41:31 2010 -0800
@@ -694,6 +694,8 @@
 void PSScavenge::oop_promotion_failed(oop obj, markOop obj_mark) {
   _promotion_failed = true;
   if (obj_mark->must_be_preserved_for_promotion_failure(obj)) {
+    // Should use per-worker private stakcs hetre rather than
+    // locking a common pair of stacks.
     ThreadCritical tc;
     _preserved_oop_stack.push(obj);
     _preserved_mark_stack.push(obj_mark);