1 /*
2 * Copyright (c) 1997, 2016, 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 LogTagType tag) {
119 _active = doit;
120 _verbose = true;
121 _tag = tag;
122 _title = title;
123
124 if (_active) {
125 _accum = NULL;
126 _t.start();
127 }
128 }
129
130 TraceTime::TraceTime(const char* title,
131 elapsedTimer* accumulator,
132 bool doit,
133 bool verbose,
134 LogTagType tag) {
135 _active = doit;
136 _verbose = verbose;
137 _tag = tag;
138 _title = title;
139
140 if (_active) {
141 _accum = accumulator;
142 _t.start();
143 }
144 }
145
146 TraceTime::~TraceTime() {
147 if (_active) {
148 _t.stop();
149 if (_accum!=NULL) _accum->add(_t);
150 if (_verbose) {
151 switch (_tag) {
152 case LogTag::_startuptime :
153 log_info(startuptime)("%s, %3.7f secs", _title, _t.seconds());
154 break;
155 case LogTag::__NO_TAG :
156 default :
157 tty->print_cr("[%s, %3.7f secs]", _title, _t.seconds());
158 tty->flush();
159 }
160 }
161 }
162 }
163
164 TraceCPUTime::TraceCPUTime(bool doit,
165 bool print_cr,
166 outputStream *logfile) :
167 _active(doit),
168 _print_cr(print_cr),
169 _starting_user_time(0.0),
170 _starting_system_time(0.0),
171 _starting_real_time(0.0),
172 _logfile(logfile),
173 _error(false) {
174 if (_active) {
175 if (logfile != NULL) {
176 _logfile = logfile;
177 } else {
178 _logfile = tty;
179 }
180
181 _error = !os::getTimesSecs(&_starting_real_time,
182 &_starting_user_time,
183 &_starting_system_time);
184 }
185 }
186
187 TraceCPUTime::~TraceCPUTime() {
188 if (_active) {
189 bool valid = false;
190 if (!_error) {
191 double real_secs; // walk clock time
192 double system_secs; // system time
193 double user_secs; // user time for all threads
194
195 double real_time, user_time, system_time;
196 valid = os::getTimesSecs(&real_time, &user_time, &system_time);
197 if (valid) {
198
199 user_secs = user_time - _starting_user_time;
200 system_secs = system_time - _starting_system_time;
201 real_secs = real_time - _starting_real_time;
202
203 _logfile->print(" [Times: user=%3.2f sys=%3.2f real=%3.2f secs] ",
204 user_secs, system_secs, real_secs);
205
206 } else {
207 _logfile->print("[Invalid result in TraceCPUTime]");
208 }
209 } else {
210 _logfile->print("[Error in TraceCPUTime]");
211 }
212 if (_print_cr) {
213 _logfile->cr();
214 }
215 _logfile->flush();
216 }
217 }