--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shenandoah/shenandoahTimingTracker.hpp	Mon Dec 10 15:47:44 2018 +0100
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHTIMINGTRACKER_HPP
+#define SHARE_VM_GC_SHENANDOAH_SHENANDOAHTIMINGTRACKER_HPP
+
+#include "jfr/jfrEvents.hpp"
+#include "gc/shenandoah/shenandoahPhaseTimings.hpp"
+#include "memory/allocation.hpp"
+
+class ShenandoahWorkerTimingsTracker : public StackObj {
+private:
+  double _start_time;
+  ShenandoahPhaseTimings::GCParPhases _phase;
+  ShenandoahWorkerTimings* _worker_times;
+  uint _worker_id;
+
+  EventGCPhaseParallel _event;
+public:
+    ShenandoahWorkerTimingsTracker(ShenandoahWorkerTimings* worker_times, ShenandoahPhaseTimings::GCParPhases phase, uint worker_id);
+    ~ShenandoahWorkerTimingsTracker();
+};
+
+
+class ShenandoahTerminationTimingsTracker : public StackObj {
+private:
+  double _start_time;
+  uint   _worker_id;
+
+public:
+  ShenandoahTerminationTimingsTracker(uint worker_id);
+  ~ShenandoahTerminationTimingsTracker();
+};
+
+// Tracking termination time in specific GC phase
+class ShenandoahTerminationTracker : public StackObj {
+private:
+  ShenandoahPhaseTimings::Phase _phase;
+
+  static ShenandoahPhaseTimings::Phase _current_termination_phase;
+public:
+  ShenandoahTerminationTracker(ShenandoahPhaseTimings::Phase phase);
+  ~ShenandoahTerminationTracker();
+
+  static ShenandoahPhaseTimings::Phase current_termination_phase() { return _current_termination_phase; }
+};
+
+#endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHTIMINGTRACKER_HPP
+