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 31 double TimeHelper::counter_to_seconds(jlong counter) { 32 double freq = (double) os::elapsed_frequency(); 33 return counter / freq; 34 } 35 36 double TimeHelper::counter_to_millis(jlong counter) { 37 return counter_to_seconds(counter) * 1000.0; 38 } 39 40 jlong TimeHelper::millis_to_counter(jlong millis) { 41 jlong freq = os::elapsed_frequency() / MILLIUNITS; 42 return millis * freq; 43 } 44 45 elapsedTimer::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 61 void elapsedTimer::add(elapsedTimer t) { 62 _counter += t._counter; 63 } 64 65 void elapsedTimer::start() { 66 if (!_active) { 67 _active = true; 68 _start_counter = os::elapsed_counter(); 69 } 70 } 71 72 void elapsedTimer::stop() { 73 if (_active) { 74 _counter += os::elapsed_counter() - _start_counter; 75 _active = false; 76 } 77 } 78 79 double elapsedTimer::seconds() const { 80 return TimeHelper::counter_to_seconds(_counter); 81 } 82 83 jlong elapsedTimer::milliseconds() const { 84 return (jlong)TimeHelper::counter_to_millis(_counter); 85 } 86 87 jlong 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 95 void TimeStamp::update_to(jlong ticks) { 96 _counter = ticks; 97 if (_counter == 0) _counter = 1; 98 assert(is_updated(), "must not look clear"); 99 } 100 101 void TimeStamp::update() { 102 update_to(os::elapsed_counter()); 103 } 104 105 double 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 } 110 111 jlong 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 } 116 117 jlong TimeStamp::ticks_since_update() const { 118 assert(is_updated(), "must not be clear"); 119 return os::elapsed_counter() - _counter; 120 } 121 122 TraceCPUTime::TraceCPUTime(bool doit, 123 bool print_cr, 124 outputStream *logfile) : 125 _active(doit), 126 _print_cr(print_cr), 127 _starting_user_time(0.0), 128 _starting_system_time(0.0), 129 _starting_real_time(0.0), 130 _logfile(logfile), 131 _error(false) { 132 if (_active) { 133 if (logfile != NULL) { 134 _logfile = logfile; 135 } else { 136 _logfile = tty; 137 } 138 139 _error = !os::getTimesSecs(&_starting_real_time, 140 &_starting_user_time, 141 &_starting_system_time); 142 } 143 } 144 145 TraceCPUTime::~TraceCPUTime() { 146 if (_active) { 147 bool valid = false; 148 if (!_error) { 149 double real_secs; // walk clock time 150 double system_secs; // system time 151 double user_secs; // user time for all threads 152 153 double real_time, user_time, system_time; 154 valid = os::getTimesSecs(&real_time, &user_time, &system_time); 155 if (valid) { 156 157 user_secs = user_time - _starting_user_time; 158 system_secs = system_time - _starting_system_time; 159 real_secs = real_time - _starting_real_time; 160 161 _logfile->print(" [Times: user=%3.2f sys=%3.2f real=%3.2f secs] ", 162 user_secs, system_secs, real_secs); 163 164 } else { 165 _logfile->print("[Invalid result in TraceCPUTime]"); 166 } 167 } else { 168 _logfile->print("[Error in TraceCPUTime]"); 169 } 170 if (_print_cr) { 171 _logfile->cr(); 172 } 173 _logfile->flush(); 174 } 175 } 176