--- /dev/null	2019-02-13 16:01:02.292000000 +0300
+++ new/src/share/vm/jfr/utilities/jfrTimeConverter.cpp	2019-02-15 19:03:30.860970462 +0300
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2011, 2018, 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
+ * 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "jfr/utilities/jfrTimeConverter.hpp"
+#include "jfr/utilities/jfrTime.hpp"
+#include "runtime/os.hpp"
+
+static double ft_counter_to_nanos_factor = .0;
+static double nanos_to_ft_counter_factor = .0;
+static double os_counter_to_nanos_factor = .0;
+static double nanos_to_os_counter_factor = .0;
+
+const double JfrTimeConverter::NANOS_PER_SEC      = 1000000000.0;
+const double JfrTimeConverter::NANOS_PER_MILLISEC = 1000000.0;
+const double JfrTimeConverter::NANOS_PER_MICROSEC = 1000.0;
+
+static bool initialized = false;
+
+void JfrTimeConverter::initialize() {
+  if (!initialized) {
+    nanos_to_os_counter_factor = (double)os::elapsed_frequency() / NANOS_PER_SEC;
+    assert(nanos_to_os_counter_factor != .0, "error in conversion!");
+    os_counter_to_nanos_factor = (double)1.0 / nanos_to_os_counter_factor;
+    assert(os_counter_to_nanos_factor != .0, "error in conversion!");
+    if (JfrTime::is_ft_enabled()) {
+      nanos_to_ft_counter_factor = (double)JfrTime::frequency() / NANOS_PER_SEC;
+      assert(nanos_to_ft_counter_factor != .0, "error in conversion!");
+      ft_counter_to_nanos_factor = (double)1.0 / nanos_to_ft_counter_factor;
+      assert(ft_counter_to_nanos_factor != .0, "error in conversion!");
+    }
+    initialized = true;
+  }
+}
+
+double JfrTimeConverter::counter_to_nano_multiplier(bool is_os_time) {
+  if (!initialized) {
+    initialize();
+  }
+  return JfrTime::is_ft_enabled() && !is_os_time ? ft_counter_to_nanos_factor : os_counter_to_nanos_factor;
+}
+
+double JfrTimeConverter::nano_to_counter_multiplier(bool is_os_time) {
+  if (!initialized) {
+    initialize();
+  }
+  return JfrTime::is_ft_enabled() && !is_os_time ? nanos_to_ft_counter_factor : nanos_to_os_counter_factor;
+}
+
+double JfrTimeConverter::counter_to_nanos_internal(jlong c, bool is_os_time) {
+  return (double)c * counter_to_nano_multiplier(is_os_time);
+}
+
+double JfrTimeConverter::counter_to_millis_internal(jlong c, bool is_os_time) {
+  return (counter_to_nanos_internal(c, is_os_time) / NANOS_PER_MILLISEC);
+}
+
+jlong JfrTimeConverter::counter_to_nanos(jlong c, bool is_os_time) {
+  return (jlong)counter_to_nanos_internal(c, is_os_time);
+}
+
+jlong JfrTimeConverter::counter_to_millis(jlong c, bool is_os_time) {
+  return (jlong)counter_to_millis_internal(c, is_os_time);
+}
+
+jlong JfrTimeConverter::nanos_to_countertime(jlong nanos, bool as_os_time) {
+  return nanos <= 0 ? 0 : (jlong)((double)nanos * nano_to_counter_multiplier(as_os_time));
+}