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diff src/share/vm/runtime/vmStructs.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 c18cbe5936b8 1a5913bf5e19
line wrap: on
line diff
--- a/src/share/vm/runtime/vmStructs.cpp	Tue Jan 12 14:56:46 2010 -0800
+++ b/src/share/vm/runtime/vmStructs.cpp	Wed Jan 13 15:26:39 2010 -0800
@@ -309,6 +309,7 @@
   nonstatic_field(CollectedHeap,               _reserved,                                     MemRegion)                             \
   nonstatic_field(SharedHeap,                  _perm_gen,                                     PermGen*)                              \
   nonstatic_field(CollectedHeap,               _barrier_set,                                  BarrierSet*)                           \
+  nonstatic_field(CollectedHeap,               _defer_initial_card_mark,                      bool)                                  \
   nonstatic_field(CollectedHeap,               _is_gc_active,                                 bool)                                  \
   nonstatic_field(CompactibleSpace,            _compaction_top,                               HeapWord*)                             \
   nonstatic_field(CompactibleSpace,            _first_dead,                                   HeapWord*)                             \