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diff src/share/vm/runtime/thread.cpp @ 1166:7b0e9cba0307

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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 9b9c1ee9b3f6
children 6deeaebad47a
line wrap: on
line diff
--- a/src/share/vm/runtime/thread.cpp	Tue Jan 12 14:56:46 2010 -0800
+++ b/src/share/vm/runtime/thread.cpp	Wed Jan 13 15:26:39 2010 -0800
@@ -2357,9 +2357,8 @@
 };
 
 void JavaThread::oops_do(OopClosure* f, CodeBlobClosure* cf) {
-  // Flush deferred store-barriers, if any, associated with
-  // initializing stores done by this JavaThread in the current epoch.
-  Universe::heap()->flush_deferred_store_barrier(this);
+  // Verify that the deferred card marks have been flushed.
+  assert(deferred_card_mark().is_empty(), "Should be empty during GC");
 
   // The ThreadProfiler oops_do is done from FlatProfiler::oops_do
   // since there may be more than one thread using each ThreadProfiler.