1 /*
2 * Copyright (c) 1997, 2015, 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 "oops/oop.inline.hpp"
27 #include "runtime/timer.hpp"
28 #include "utilities/ostream.hpp"
29
30 double TimeHelper::counter_to_seconds(jlong counter) {
31 double freq = (double) os::elapsed_frequency();
32 return counter / freq;
33 }
34
35 double TimeHelper::counter_to_millis(jlong counter) {
36 return counter_to_seconds(counter) * 1000.0;
37 }
38
39 elapsedTimer::elapsedTimer(jlong time, jlong timeUnitsPerSecond) {
40 _active = false;
41 jlong osTimeUnitsPerSecond = os::elapsed_frequency();
42 assert(osTimeUnitsPerSecond % 1000 == 0, "must be");
43 assert(timeUnitsPerSecond % 1000 == 0, "must be");
44 while (osTimeUnitsPerSecond < timeUnitsPerSecond) {
45 timeUnitsPerSecond /= 1000;
46 time *= 1000;
47 }
48 while (osTimeUnitsPerSecond > timeUnitsPerSecond) {
49 timeUnitsPerSecond *= 1000;
50 time /= 1000;
51 }
52 _counter = time;
53 }
54
55 void elapsedTimer::add(elapsedTimer t) {
56 _counter += t._counter;
57 }
58
59 void elapsedTimer::start() {
60 if (!_active) {
61 _active = true;
62 _start_counter = os::elapsed_counter();
63 }
64 }
65
66 void elapsedTimer::stop() {
67 if (_active) {
68 _counter += os::elapsed_counter() - _start_counter;
69 _active = false;
70 }
71 }
72
73 double elapsedTimer::seconds() const {
74 return TimeHelper::counter_to_seconds(_counter);
75 }
76
77 jlong elapsedTimer::milliseconds() const {
78 return (jlong)TimeHelper::counter_to_millis(_counter);
79 }
80
81 jlong elapsedTimer::active_ticks() const {
82 if (!_active) {
83 return ticks();
84 }
85 jlong counter = _counter + os::elapsed_counter() - _start_counter;
86 return counter;
87 }
88
89 void TimeStamp::update_to(jlong ticks) {
90 _counter = ticks;
91 if (_counter == 0) _counter = 1;
92 assert(is_updated(), "must not look clear");
93 }
94
95 void TimeStamp::update() {
96 update_to(os::elapsed_counter());
97 }
98
99 double TimeStamp::seconds() const {
100 assert(is_updated(), "must not be clear");
101 jlong new_count = os::elapsed_counter();
102 return TimeHelper::counter_to_seconds(new_count - _counter);
103 }
104
105 jlong TimeStamp::milliseconds() const {
106 assert(is_updated(), "must not be clear");
107 jlong new_count = os::elapsed_counter();
108 return (jlong)TimeHelper::counter_to_millis(new_count - _counter);
109 }
110
111 jlong TimeStamp::ticks_since_update() const {
112 assert(is_updated(), "must not be clear");
113 return os::elapsed_counter() - _counter;
114 }
115
116 TraceTime::TraceTime(const char* title,
117 bool doit) {
118 _active = doit;
119 _verbose = true;
120
121 if (_active) {
122 _accum = NULL;
123 tty->print("[%s", title);
124 tty->flush();
125 _t.start();
126 }
127 }
128
129 TraceTime::TraceTime(const char* title,
130 elapsedTimer* accumulator,
131 bool doit,
132 bool verbose) {
133 _active = doit;
134 _verbose = verbose;
135 if (_active) {
136 if (_verbose) {
137 tty->print("[%s", title);
138 tty->flush();
139 }
140 _accum = accumulator;
141 _t.start();
142 }
143 }
144
145 TraceTime::~TraceTime() {
146 if (_active) {
147 _t.stop();
148 if (_accum!=NULL) _accum->add(_t);
149 if (_verbose) {
150 tty->print_cr(", %3.7f secs]", _t.seconds());
151 tty->flush();
152 }
153 }
154 }
155
156 TraceCPUTime::TraceCPUTime(bool doit,
157 bool print_cr,
158 outputStream *logfile) :
159 _active(doit),
160 _print_cr(print_cr),
161 _starting_user_time(0.0),
162 _starting_system_time(0.0),
163 _starting_real_time(0.0),
164 _logfile(logfile),
165 _error(false) {
166 if (_active) {
167 if (logfile != NULL) {
168 _logfile = logfile;
169 } else {
170 _logfile = tty;
171 }
172
173 _error = !os::getTimesSecs(&_starting_real_time,
174 &_starting_user_time,
175 &_starting_system_time);
176 }
177 }
178
179 TraceCPUTime::~TraceCPUTime() {
180 if (_active) {
181 bool valid = false;
182 if (!_error) {
183 double real_secs; // walk clock time
184 double system_secs; // system time
185 double user_secs; // user time for all threads
186
187 double real_time, user_time, system_time;
188 valid = os::getTimesSecs(&real_time, &user_time, &system_time);
189 if (valid) {
190
191 user_secs = user_time - _starting_user_time;
192 system_secs = system_time - _starting_system_time;
193 real_secs = real_time - _starting_real_time;
194
195 _logfile->print(" [Times: user=%3.2f sys=%3.2f real=%3.2f secs] ",
196 user_secs, system_secs, real_secs);
197
198 } else {
199 _logfile->print("[Invalid result in TraceCPUTime]");
200 }
201 } else {
202 _logfile->print("[Error in TraceCPUTime]");
203 }
204 if (_print_cr) {
205 _logfile->cr();
206 }
207 _logfile->flush();
208 }
209 }