--- a/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Mon Aug 03 12:59:30 2009 -0700
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Tue Aug 04 16:00:17 2009 -0700
@@ -112,7 +112,6 @@
     return 8*M;
   }
 
-
   double _cur_collection_start_sec;
   size_t _cur_collection_pause_used_at_start_bytes;
   size_t _cur_collection_pause_used_regions_at_start;
@@ -122,6 +121,15 @@
   double _cur_clear_ct_time_ms;
   bool   _satb_drain_time_set;
 
+#ifndef PRODUCT
+  // Card Table Count Cache stats
+  double _min_clear_cc_time_ms;         // min
+  double _max_clear_cc_time_ms;         // max
+  double _cur_clear_cc_time_ms;         // clearing time during current pause
+  double _cum_clear_cc_time_ms;         // cummulative clearing time
+  jlong  _num_cc_clears;                // number of times the card count cache has been cleared
+#endif
+
   double _cur_CH_strong_roots_end_sec;
   double _cur_CH_strong_roots_dur_ms;
   double _cur_G1_strong_roots_end_sec;
@@ -931,6 +939,18 @@
     _cur_aux_times_ms[i] += ms;
   }
 
+#ifndef PRODUCT
+  void record_cc_clear_time(double ms) {
+    if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms)
+      _min_clear_cc_time_ms = ms;
+    if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms)
+      _max_clear_cc_time_ms = ms;
+    _cur_clear_cc_time_ms = ms;
+    _cum_clear_cc_time_ms += ms;
+    _num_cc_clears++;
+  }
+#endif
+
   // Record the fact that "bytes" bytes allocated in a region.
   void record_before_bytes(size_t bytes);
   void record_after_bytes(size_t bytes);