--- old/src/share/vm/gc/g1/g1StringDedupStat.hpp	2016-06-27 15:23:15.949992719 +0200
+++ new/src/share/vm/gc/g1/g1StringDedupStat.hpp	2016-06-27 15:23:15.860988970 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -30,11 +30,14 @@
 
 // Macros for GC log output formating
 #define G1_STRDEDUP_OBJECTS_FORMAT         UINTX_FORMAT_W(12)
-#define G1_STRDEDUP_TIME_FORMAT            "%1.7lf secs"
-#define G1_STRDEDUP_PERCENT_FORMAT         "%5.1lf%%"
-#define G1_STRDEDUP_PERCENT_FORMAT_NS      "%.1lf%%"
-#define G1_STRDEDUP_BYTES_FORMAT           "%8.1lf%s"
-#define G1_STRDEDUP_BYTES_FORMAT_NS        "%.1lf%s"
+#define G1_STRDEDUP_TIME_FORMAT            "%.3fs"
+#define G1_STRDEDUP_TIME_PARAM(time)       (time)
+#define G1_STRDEDUP_TIME_FORMAT_MS         "%.3fms"
+#define G1_STRDEDUP_TIME_PARAM_MS(time)    ((time) * MILLIUNITS)
+#define G1_STRDEDUP_PERCENT_FORMAT         "%5.1f%%"
+#define G1_STRDEDUP_PERCENT_FORMAT_NS      "%.1f%%"
+#define G1_STRDEDUP_BYTES_FORMAT           "%8.1f%s"
+#define G1_STRDEDUP_BYTES_FORMAT_NS        "%.1f%s"
 #define G1_STRDEDUP_BYTES_PARAM(bytes)     byte_size_in_proper_unit((double)(bytes)), proper_unit_for_byte_size((bytes))
 
 //
@@ -60,7 +63,9 @@
   uintx  _block;
 
   // Time spent by the deduplication thread in different phases
-  double _start;
+  double _start_concurrent;
+  double _end_concurrent;
+  double _start_phase;
   double _idle_elapsed;
   double _exec_elapsed;
   double _block_elapsed;
@@ -104,38 +109,41 @@
   }
 
   void mark_idle() {
-    _start = os::elapsedTime();
+    _start_phase = os::elapsedTime();
     _idle++;
   }
 
   void mark_exec() {
     double now = os::elapsedTime();
-    _idle_elapsed = now - _start;
-    _start = now;
+    _idle_elapsed = now - _start_phase;
+    _start_phase = now;
+    _start_concurrent = now;
     _exec++;
   }
 
   void mark_block() {
     double now = os::elapsedTime();
-    _exec_elapsed += now - _start;
-    _start = now;
+    _exec_elapsed += now - _start_phase;
+    _start_phase = now;
     _block++;
   }
 
   void mark_unblock() {
     double now = os::elapsedTime();
-    _block_elapsed += now - _start;
-    _start = now;
+    _block_elapsed += now - _start_phase;
+    _start_phase = now;
   }
 
   void mark_done() {
     double now = os::elapsedTime();
-    _exec_elapsed += now - _start;
+    _exec_elapsed += now - _start_phase;
+    _end_concurrent = now;
   }
 
   void add(const G1StringDedupStat& stat);
 
-  static void print_summary(const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat);
+  static void print_start(const G1StringDedupStat& last_stat);
+  static void print_end(const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat);
   static void print_statistics(const G1StringDedupStat& stat, bool total);
 };