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diff src/share/vm/memory/cardTableRS.cpp @ 4095:bca17e38de00

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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads Summary: Select number of GC threads dynamically based on heap usage and number of Java threads Reviewed-by: johnc, ysr, jcoomes
author jmasa
date Tue, 09 Aug 2011 10:16:01 -0700
parents fc2b798ab316
children c7a555a9449a
line wrap: on
line diff
--- a/src/share/vm/memory/cardTableRS.cpp	Tue Nov 22 04:47:10 2011 -0500
+++ b/src/share/vm/memory/cardTableRS.cpp	Tue Aug 09 10:16:01 2011 -0700
@@ -164,7 +164,13 @@
 ClearNoncleanCardWrapper::ClearNoncleanCardWrapper(
   DirtyCardToOopClosure* dirty_card_closure, CardTableRS* ct) :
     _dirty_card_closure(dirty_card_closure), _ct(ct) {
+    // Cannot yet substitute active_workers for n_par_threads
+    // in the case where parallelism is being turned off by
+    // setting n_par_threads to 0.
     _is_par = (SharedHeap::heap()->n_par_threads() > 0);
+    assert(!_is_par ||
+           (SharedHeap::heap()->n_par_threads() ==
+            SharedHeap::heap()->workers()->active_workers()), "Mismatch");
 }
 
 void ClearNoncleanCardWrapper::do_MemRegion(MemRegion mr) {