1/*
2 * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "jfr/utilities/jfrTime.hpp"
27#include "runtime/os.hpp"
28#if defined(X86) && !defined(ZERO)
29#include "rdtsc_x86.hpp"
30#endif
31
32#include OS_HEADER_INLINE(os)
33
34bool JfrTime::_ft_enabled = false;
35
36bool JfrTime::initialize() {
37 static bool initialized = false;
38 if (!initialized) {
39#if defined(X86) && !defined(ZERO)
40 _ft_enabled = Rdtsc::initialize();
41#else
42 _ft_enabled = false;
43#endif
44 initialized = true;
45 }
46 return initialized;
47}
48
49bool JfrTime::is_ft_supported() {
50#if defined(X86) && !defined(ZERO)
51 return Rdtsc::is_supported();
52#else
53 return false;
54#endif
55}
56
57
58const void* JfrTime::time_function() {
59#if defined(X86) && !defined(ZERO)
60 return _ft_enabled ? (const void*)Rdtsc::elapsed_counter : (const void*)os::elapsed_counter;
61#else
62 return (const void*)os::elapsed_counter;
63#endif
64}
65
66jlong JfrTime::frequency() {
67#if defined(X86) && !defined(ZERO)
68 return _ft_enabled ? Rdtsc::frequency() : os::elapsed_frequency();
69#else
70 return os::elapsed_frequency();
71#endif
72}
73
74