Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/timer.cpp @ 3979:4dfb2df418f2
6484982: G1: process references during evacuation pauses
Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp
| author | johnc |
|---|---|
| date | Thu, 22 Sep 2011 10:57:37 -0700 |
| parents | f95d63e2154a |
| children | f08d439fab8c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "oops/oop.inline.hpp" | |
| 27 #include "runtime/timer.hpp" | |
| 28 #include "utilities/ostream.hpp" | |
| 29 #ifdef TARGET_OS_FAMILY_linux | |
| 30 # include "os_linux.inline.hpp" | |
| 31 #endif | |
| 32 #ifdef TARGET_OS_FAMILY_solaris | |
| 33 # include "os_solaris.inline.hpp" | |
| 34 #endif | |
| 35 #ifdef TARGET_OS_FAMILY_windows | |
| 36 # include "os_windows.inline.hpp" | |
| 37 #endif | |
| 0 | 38 |
| 39 | |
| 40 void elapsedTimer::add(elapsedTimer t) { | |
| 41 _counter += t._counter; | |
| 42 } | |
| 43 | |
| 44 void elapsedTimer::start() { | |
| 45 if (!_active) { | |
| 46 _active = true; | |
| 47 _start_counter = os::elapsed_counter(); | |
| 48 } | |
| 49 } | |
| 50 | |
| 51 void elapsedTimer::stop() { | |
| 52 if (_active) { | |
| 53 _counter += os::elapsed_counter() - _start_counter; | |
| 54 _active = false; | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 double elapsedTimer::seconds() const { | |
| 59 double count = (double) _counter; | |
| 60 double freq = (double) os::elapsed_frequency(); | |
| 61 return count/freq; | |
| 62 } | |
| 63 | |
| 64 jlong elapsedTimer::milliseconds() const { | |
| 65 jlong ticks_per_ms = os::elapsed_frequency() / 1000; | |
| 66 return _counter / ticks_per_ms; | |
| 67 } | |
| 68 | |
| 69 jlong elapsedTimer::active_ticks() const { | |
| 70 if (!_active) { | |
| 71 return ticks(); | |
| 72 } | |
| 73 jlong counter = _counter + os::elapsed_counter() - _start_counter; | |
| 74 return counter; | |
| 75 } | |
| 76 | |
| 77 void TimeStamp::update_to(jlong ticks) { | |
| 78 _counter = ticks; | |
| 79 if (_counter == 0) _counter = 1; | |
| 80 assert(is_updated(), "must not look clear"); | |
| 81 } | |
| 82 | |
| 83 void TimeStamp::update() { | |
| 84 update_to(os::elapsed_counter()); | |
| 85 } | |
| 86 | |
| 87 double TimeStamp::seconds() const { | |
| 88 assert(is_updated(), "must not be clear"); | |
| 89 jlong new_count = os::elapsed_counter(); | |
| 90 double count = (double) new_count - _counter; | |
| 91 double freq = (double) os::elapsed_frequency(); | |
| 92 return count/freq; | |
| 93 } | |
| 94 | |
| 95 jlong TimeStamp::milliseconds() const { | |
| 96 assert(is_updated(), "must not be clear"); | |
| 97 | |
| 98 jlong new_count = os::elapsed_counter(); | |
| 99 jlong count = new_count - _counter; | |
| 100 jlong ticks_per_ms = os::elapsed_frequency() / 1000; | |
| 101 return count / ticks_per_ms; | |
| 102 } | |
| 103 | |
| 104 jlong TimeStamp::ticks_since_update() const { | |
| 105 assert(is_updated(), "must not be clear"); | |
| 106 return os::elapsed_counter() - _counter; | |
| 107 } | |
| 108 | |
| 109 TraceTime::TraceTime(const char* title, | |
| 110 bool doit, | |
| 111 bool print_cr, | |
| 112 outputStream* logfile) { | |
| 113 _active = doit; | |
| 114 _verbose = true; | |
| 115 _print_cr = print_cr; | |
| 116 _logfile = (logfile != NULL) ? logfile : tty; | |
| 117 | |
| 118 if (_active) { | |
| 119 _accum = NULL; | |
| 120 if (PrintGCTimeStamps) { | |
| 121 _logfile->stamp(); | |
| 122 _logfile->print(": "); | |
| 123 } | |
| 124 _logfile->print("[%s", title); | |
| 125 _logfile->flush(); | |
| 126 _t.start(); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 TraceTime::TraceTime(const char* title, | |
| 131 elapsedTimer* accumulator, | |
| 132 bool doit, | |
| 133 bool verbose, | |
| 134 outputStream* logfile) { | |
| 135 _active = doit; | |
| 136 _verbose = verbose; | |
| 137 _print_cr = true; | |
| 138 _logfile = (logfile != NULL) ? logfile : tty; | |
| 139 if (_active) { | |
| 140 if (_verbose) { | |
| 141 if (PrintGCTimeStamps) { | |
| 142 _logfile->stamp(); | |
| 143 _logfile->print(": "); | |
| 144 } | |
| 145 _logfile->print("[%s", title); | |
| 146 _logfile->flush(); | |
| 147 } | |
| 148 _accum = accumulator; | |
| 149 _t.start(); | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 TraceTime::~TraceTime() { | |
| 154 if (_active) { | |
| 155 _t.stop(); | |
| 156 if (_accum!=NULL) _accum->add(_t); | |
| 157 if (_verbose) { | |
| 158 if (_print_cr) { | |
| 159 _logfile->print_cr(", %3.7f secs]", _t.seconds()); | |
| 160 } else { | |
| 161 _logfile->print(", %3.7f secs]", _t.seconds()); | |
| 162 } | |
| 163 _logfile->flush(); | |
| 164 } | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 TraceCPUTime::TraceCPUTime(bool doit, | |
| 169 bool print_cr, | |
| 170 outputStream *logfile) : | |
| 171 _active(doit), | |
| 172 _print_cr(print_cr), | |
| 173 _starting_user_time(0.0), | |
| 174 _starting_system_time(0.0), | |
| 175 _starting_real_time(0.0), | |
| 176 _logfile(logfile), | |
| 177 _error(false) { | |
| 178 if (_active) { | |
| 179 if (logfile != NULL) { | |
| 180 _logfile = logfile; | |
| 181 } else { | |
| 182 _logfile = tty; | |
| 183 } | |
| 184 | |
| 185 _error = !os::getTimesSecs(&_starting_real_time, | |
| 186 &_starting_user_time, | |
| 187 &_starting_system_time); | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 TraceCPUTime::~TraceCPUTime() { | |
| 192 if (_active) { | |
| 193 bool valid = false; | |
| 194 if (!_error) { | |
| 195 double real_secs; // walk clock time | |
| 196 double system_secs; // system time | |
| 197 double user_secs; // user time for all threads | |
| 198 | |
| 199 double real_time, user_time, system_time; | |
| 200 valid = os::getTimesSecs(&real_time, &user_time, &system_time); | |
| 201 if (valid) { | |
| 202 | |
| 203 user_secs = user_time - _starting_user_time; | |
| 204 system_secs = system_time - _starting_system_time; | |
| 205 real_secs = real_time - _starting_real_time; | |
| 206 | |
| 207 _logfile->print(" [Times: user=%3.2f sys=%3.2f, real=%3.2f secs] ", | |
| 208 user_secs, system_secs, real_secs); | |
| 209 | |
| 210 } else { | |
| 211 _logfile->print("[Invalid result in TraceCPUTime]"); | |
| 212 } | |
| 213 } else { | |
| 214 _logfile->print("[Error in TraceCPUTime]"); | |
| 215 } | |
| 216 if (_print_cr) { | |
| 217 _logfile->print_cr(""); | |
| 218 } | |
| 219 } | |
| 220 } |