1/*
2 * Copyright (c) 1997, 2017, 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 "logging/log.hpp"
27#include "oops/oop.inline.hpp"
28#include "runtime/timer.hpp"
29#include "utilities/ostream.hpp"
30
31double TimeHelper::counter_to_seconds(jlong counter) {
32 double freq = (double) os::elapsed_frequency();
33 return counter / freq;
34}
35
36double TimeHelper::counter_to_millis(jlong counter) {
37 return counter_to_seconds(counter) * 1000.0;
38}
39
40jlong TimeHelper::millis_to_counter(jlong millis) {
41 jlong freq = os::elapsed_frequency() / MILLIUNITS;
42 return millis * freq;
43}
44
45elapsedTimer::elapsedTimer(jlong time, jlong timeUnitsPerSecond) {
46 _active = false;
47 jlong osTimeUnitsPerSecond = os::elapsed_frequency();
48 assert(osTimeUnitsPerSecond % 1000 == 0, "must be");
49 assert(timeUnitsPerSecond % 1000 == 0, "must be");
50 while (osTimeUnitsPerSecond < timeUnitsPerSecond) {
51 timeUnitsPerSecond /= 1000;
52 time *= 1000;
53 }
54 while (osTimeUnitsPerSecond > timeUnitsPerSecond) {
55 timeUnitsPerSecond *= 1000;
56 time /= 1000;
57 }
58 _counter = time;
59}
60
61void elapsedTimer::add(elapsedTimer t) {
62 _counter += t._counter;
63}
64
65void elapsedTimer::start() {
66 if (!_active) {
67 _active = true;
68 _start_counter = os::elapsed_counter();
69 }
70}
71
72void elapsedTimer::stop() {
73 if (_active) {
74 _counter += os::elapsed_counter() - _start_counter;
75 _active = false;
76 }
77}
78
79double elapsedTimer::seconds() const {
80 return TimeHelper::counter_to_seconds(_counter);
81}
82
83jlong elapsedTimer::milliseconds() const {
84 return (jlong)TimeHelper::counter_to_millis(_counter);
85}
86
87jlong elapsedTimer::active_ticks() const {
88 if (!_active) {
89 return ticks();
90 }
91 jlong counter = _counter + os::elapsed_counter() - _start_counter;
92 return counter;
93}
94
95void TimeStamp::update_to(jlong ticks) {
96 _counter = ticks;
97 if (_counter == 0) _counter = 1;
98 assert(is_updated(), "must not look clear");
99}
100
101void TimeStamp::update() {
102 update_to(os::elapsed_counter());
103}
104
105double TimeStamp::seconds() const {
106 assert(is_updated(), "must not be clear");
107 jlong new_count = os::elapsed_counter();
108 return TimeHelper::counter_to_seconds(new_count - _counter);
109}
110
111jlong TimeStamp::milliseconds() const {
112 assert(is_updated(), "must not be clear");
113 jlong new_count = os::elapsed_counter();
114 return (jlong)TimeHelper::counter_to_millis(new_count - _counter);
115}
116
117jlong TimeStamp::ticks_since_update() const {
118 assert(is_updated(), "must not be clear");
119 return os::elapsed_counter() - _counter;
120}
121