src/share/vm/gc/cms/parNewGeneration.hpp

rev 8461 : 8086056: ParNew: auto-tune ParGCCardsPerStrideChunk
Summary: Automatically calculate ParGCCardsPerStrideChunk based on the old gen capacity.
Reviewed-by:
rev 8409 : 8080879: Remove FlexibleWorkGang::set_for_termination
Reviewed-by: brutisso, kbarrett, pliden
rev 8396 : 8080110: Remove usage of CollectedHeap::n_par_threads() from root processing
Reviewed-by: jmasa, kbarrett
rev 8362 : 8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david

@@ -343,17 +343,23 @@
   // word being overwritten with a self-forwarding-pointer.
   void preserve_mark_if_necessary(oop obj, markOop m);
 
   void handle_promotion_failed(GenCollectedHeap* gch, ParScanThreadStateSet& thread_state_set);
 
- protected:
-
   bool _survivor_overflow;
 
   bool survivor_overflow() { return _survivor_overflow; }
   void set_survivor_overflow(bool v) { _survivor_overflow = v; }
 
+  // true -> should automatically calculate ParGCCardsPerStrideChunk
+  // before each young GC
+  bool _should_adjust_cards_per_stride;
+
+  // automatically calculate ParGCCardsPerStrideChunk based on the old
+  // gen capacity before each young GC
+  void adjust_cards_per_stride(const Generation& old_gen);
+
  public:
   ParNewGeneration(ReservedSpace rs, size_t initial_byte_size, int level);
 
   ~ParNewGeneration() {
     for (uint i = 0; i < ParallelGCThreads; i++)