diff -r 8ab1fa795124 -r 2d278f82253d hotspot/src/share/vm/gc_implementation/shared/gcTrace.cpp
--- a/hotspot/src/share/vm/gc_implementation/shared/gcTrace.cpp	Wed Jun 12 15:50:14 2013 +0200
+++ b/hotspot/src/share/vm/gc_implementation/shared/gcTrace.cpp	Wed Jun 12 15:21:41 2013 +0200
@@ -30,6 +30,7 @@
 #include "gc_implementation/shared/objectCountEventSender.hpp"
 #include "memory/heapInspection.hpp"
 #include "memory/referenceProcessorStats.hpp"
+#include "runtime/os.hpp"
 #include "utilities/globalDefinitions.hpp"
 
 #if INCLUDE_ALL_GCS
@@ -96,17 +97,19 @@
   const GCId _gc_id;
   const double _size_threshold_percentage;
   const size_t _total_size_in_words;
+  const jlong _timestamp;
 
  public:
-  ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words) :
+  ObjectCountEventSenderClosure(GCId gc_id, size_t total_size_in_words, jlong timestamp) :
     _gc_id(gc_id),
     _size_threshold_percentage(ObjectCountCutOffPercent / 100),
-    _total_size_in_words(total_size_in_words)
+    _total_size_in_words(total_size_in_words),
+    _timestamp(timestamp)
   {}
 
   virtual void do_cinfo(KlassInfoEntry* entry) {
     if (should_send_event(entry)) {
-      ObjectCountEventSender::send(entry, _gc_id);
+      ObjectCountEventSender::send(entry, _gc_id, _timestamp);
     }
   }
 
@@ -129,7 +132,8 @@
       HeapInspection hi(false, false, false, NULL);
       hi.populate_table(&cit, is_alive_cl);
 
-      ObjectCountEventSenderClosure event_sender(_shared_gc_info.id(), cit.size_of_instances_in_words());
+      jlong timestamp = os::elapsed_counter();
+      ObjectCountEventSenderClosure event_sender(_shared_gc_info.id(), cit.size_of_instances_in_words(), timestamp);
       cit.iterate(&event_sender);
     }
   }