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diff src/share/vm/gc_implementation/g1/g1ParScanThreadState.cpp @ 24077:8a2db0a6c499 jdk8u102-b35

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8152438: Threads may do significant work out of the non-shared overflow buffer Summary: Before processing an element in the non-shared overflow buffer, try to push it into the local shared buffer to keep it full. Reviewed-by: jmasa, ehelin, sjohanss
author shshahma
date Thu, 01 Sep 2016 06:16:05 -0700
parents c132be0fb74d
children
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line diff
--- a/src/share/vm/gc_implementation/g1/g1ParScanThreadState.cpp	Thu Sep 15 09:06:56 2016 -0700
+++ b/src/share/vm/gc_implementation/g1/g1ParScanThreadState.cpp	Thu Sep 01 06:16:05 2016 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -148,7 +148,9 @@
   do {
     // Drain the overflow stack first, so other threads can steal.
     while (_refs->pop_overflow(ref)) {
-      dispatch_reference(ref);
+      if (!_refs->try_push_to_taskqueue(ref)) {
+        dispatch_reference(ref);
+      }
     }
 
     while (_refs->pop_local(ref)) {