diff -r 4b60f23c4223 -r 56507bcd639e src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp
--- a/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Thu Apr 01 20:48:50 2010 -0400
+++ b/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp	Tue Mar 30 15:36:55 2010 -0400
@@ -215,6 +215,8 @@
   SurvRateGroup*        _survivor_surv_rate_group;
   // add here any more surv rate groups
 
+  double                _gc_overhead_perc;
+
   bool during_marking() {
     return _during_marking;
   }