Mercurial > hg > truffle
annotate src/share/vm/runtime/statSampler.cpp @ 1980:828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
Summary: move functions from hpi library to hotspot, communicate with licensees and open source community, check jdk for dependency, file CCC request
Reviewed-by: coleenp, acorn, dsamersoff
| author | ikrylov |
|---|---|
| date | Wed, 01 Dec 2010 18:26:32 -0500 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2001, 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 "classfile/systemDictionary.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
| 28 #include "memory/allocation.inline.hpp" | |
| 29 #include "memory/resourceArea.hpp" | |
| 30 #include "oops/oop.inline.hpp" | |
| 31 #include "runtime/arguments.hpp" | |
| 32 #include "runtime/java.hpp" | |
| 33 #include "runtime/javaCalls.hpp" | |
| 34 #include "runtime/os.hpp" | |
| 35 #include "runtime/statSampler.hpp" | |
| 36 #ifdef TARGET_ARCH_x86 | |
| 37 # include "vm_version_x86.hpp" | |
| 38 #endif | |
| 39 #ifdef TARGET_ARCH_sparc | |
| 40 # include "vm_version_sparc.hpp" | |
| 41 #endif | |
| 42 #ifdef TARGET_ARCH_zero | |
| 43 # include "vm_version_zero.hpp" | |
| 44 #endif | |
| 0 | 45 |
| 46 // -------------------------------------------------------- | |
| 47 // StatSamplerTask | |
| 48 | |
| 49 class StatSamplerTask : public PeriodicTask { | |
| 50 public: | |
| 51 StatSamplerTask(int interval_time) : PeriodicTask(interval_time) {} | |
| 52 void task() { StatSampler::collect_sample(); } | |
| 53 }; | |
| 54 | |
| 55 | |
| 56 //---------------------------------------------------------- | |
| 57 // Implementation of StatSampler | |
| 58 | |
| 59 StatSamplerTask* StatSampler::_task = NULL; | |
| 60 PerfDataList* StatSampler::_sampled = NULL; | |
| 61 | |
| 62 /* | |
| 63 * the initialize method is called from the engage() method | |
| 64 * and is responsible for initializing various global variables. | |
| 65 */ | |
| 66 void StatSampler::initialize() { | |
| 67 | |
| 68 if (!UsePerfData) return; | |
| 69 | |
| 70 // create performance data that could not be created prior | |
| 71 // to vm_init_globals() or otherwise have no logical home. | |
| 72 | |
| 73 create_misc_perfdata(); | |
| 74 | |
| 75 // get copy of the sampled list | |
| 76 _sampled = PerfDataManager::sampled(); | |
| 77 | |
| 78 } | |
| 79 | |
| 80 /* | |
| 81 * The engage() method is called at initialization time via | |
| 82 * Thread::create_vm() to initialize the StatSampler and | |
| 83 * register it with the WatcherThread as a periodic task. | |
| 84 */ | |
| 85 void StatSampler::engage() { | |
| 86 | |
| 87 if (!UsePerfData) return; | |
| 88 | |
| 89 if (!is_active()) { | |
| 90 | |
| 91 initialize(); | |
| 92 | |
| 93 // start up the periodic task | |
| 94 _task = new StatSamplerTask(PerfDataSamplingInterval); | |
| 95 _task->enroll(); | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 | |
| 100 /* | |
| 101 * the disengage() method is responsible for deactivating the periodic | |
| 102 * task and, if logging was enabled, for logging the final sample. This | |
| 103 * method is called from before_exit() in java.cpp and is only called | |
| 104 * after the WatcherThread has been stopped. | |
| 105 */ | |
| 106 void StatSampler::disengage() { | |
| 107 | |
| 108 if (!UsePerfData) return; | |
| 109 | |
| 110 if (!is_active()) | |
| 111 return; | |
| 112 | |
| 113 // remove StatSamplerTask | |
| 114 _task->disenroll(); | |
| 115 delete _task; | |
| 116 _task = NULL; | |
| 117 | |
| 118 // force a final sample | |
| 119 sample_data(_sampled); | |
| 120 } | |
| 121 | |
| 122 /* | |
| 123 * the destroy method is responsible for releasing any resources used by | |
| 124 * the StatSampler prior to shutdown of the VM. this method is called from | |
| 125 * before_exit() in java.cpp and is only called after the WatcherThread | |
| 126 * has stopped. | |
| 127 */ | |
| 128 void StatSampler::destroy() { | |
| 129 | |
| 130 if (!UsePerfData) return; | |
| 131 | |
| 132 if (_sampled != NULL) { | |
| 133 delete(_sampled); | |
| 134 _sampled = NULL; | |
| 135 } | |
| 136 } | |
| 137 | |
| 138 /* | |
| 139 * The sample_data() method is responsible for sampling the | |
| 140 * the data value for each PerfData instance in the given list. | |
| 141 */ | |
| 142 void StatSampler::sample_data(PerfDataList* list) { | |
| 143 | |
| 144 assert(list != NULL, "null list unexpected"); | |
| 145 | |
| 146 for (int index = 0; index < list->length(); index++) { | |
| 147 PerfData* item = list->at(index); | |
| 148 item->sample(); | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 /* | |
| 153 * the collect_sample() method is the method invoked by the | |
| 154 * WatcherThread via the PeriodicTask::task() method. This method | |
| 155 * is responsible for collecting data samples from sampled | |
| 156 * PerfData instances every PerfDataSamplingInterval milliseconds. | |
| 157 * It is also responsible for logging the requested set of | |
| 158 * PerfData instances every _sample_count milliseconds. While | |
| 159 * logging data, it will output a column header after every _print_header | |
| 160 * rows of data have been logged. | |
| 161 */ | |
| 162 void StatSampler::collect_sample() { | |
| 163 | |
| 164 // future - check for new PerfData objects. PerfData objects might | |
| 165 // get added to the PerfDataManager lists after we have already | |
| 166 // built our local copies. | |
| 167 // | |
| 168 // if (PerfDataManager::count() > previous) { | |
| 169 // // get a new copy of the sampled list | |
| 170 // if (_sampled != NULL) { | |
| 171 // delete(_sampled); | |
| 172 // _sampled = NULL; | |
| 173 // } | |
| 174 // _sampled = PerfDataManager::sampled(); | |
| 175 // } | |
| 176 | |
| 177 assert(_sampled != NULL, "list not initialized"); | |
| 178 | |
| 179 sample_data(_sampled); | |
| 180 } | |
| 181 | |
| 182 /* | |
| 183 * method to upcall into Java to return the value of the specified | |
| 184 * property as a utf8 string, or NULL if does not exist. The caller | |
| 185 * is responsible for setting a ResourceMark for proper cleanup of | |
| 186 * the utf8 strings. | |
| 187 */ | |
| 188 const char* StatSampler::get_system_property(const char* name, TRAPS) { | |
| 189 | |
| 190 // setup the arguments to getProperty | |
| 191 Handle key_str = java_lang_String::create_from_str(name, CHECK_NULL); | |
| 192 | |
| 193 // return value | |
| 194 JavaValue result(T_OBJECT); | |
| 195 | |
| 196 // public static String getProperty(String key, String def); | |
| 197 JavaCalls::call_static(&result, | |
| 1142 | 198 KlassHandle(THREAD, SystemDictionary::System_klass()), |
| 0 | 199 vmSymbolHandles::getProperty_name(), |
| 200 vmSymbolHandles::string_string_signature(), | |
| 201 key_str, | |
| 202 CHECK_NULL); | |
| 203 | |
| 204 oop value_oop = (oop)result.get_jobject(); | |
| 205 if (value_oop == NULL) { | |
| 206 return NULL; | |
| 207 } | |
| 208 | |
| 209 // convert Java String to utf8 string | |
| 210 char* value = java_lang_String::as_utf8_string(value_oop); | |
| 211 | |
| 212 return value; | |
| 213 } | |
| 214 | |
| 215 /* | |
| 216 * The list of System Properties that have corresponding PerfData | |
| 217 * string instrumentation created by retrieving the named property's | |
| 218 * value from System.getProperty() and unconditionally creating a | |
| 219 * PerfStringConstant object initialized to the retreived value. This | |
| 220 * is not an exhustive list of Java properties with corresponding string | |
| 221 * instrumentation as the create_system_property_instrumentation() method | |
| 222 * creates other property based instrumentation conditionally. | |
| 223 */ | |
| 224 | |
| 225 // stable interface, supported counters | |
| 226 static const char* property_counters_ss[] = { | |
| 227 "java.vm.specification.version", | |
| 228 "java.vm.specification.name", | |
| 229 "java.vm.specification.vendor", | |
| 230 "java.vm.version", | |
| 231 "java.vm.name", | |
| 232 "java.vm.vendor", | |
| 233 "java.vm.info", | |
| 234 "java.library.path", | |
| 235 "java.class.path", | |
| 236 "java.endorsed.dirs", | |
| 237 "java.ext.dirs", | |
|
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238 "java.version", |
| 0 | 239 "java.home", |
| 240 NULL | |
| 241 }; | |
| 242 | |
| 243 // unstable interface, supported counters | |
| 244 static const char* property_counters_us[] = { | |
| 245 NULL | |
| 246 }; | |
| 247 | |
| 248 // unstable interface, unsupported counters | |
| 249 static const char* property_counters_uu[] = { | |
| 250 "sun.boot.class.path", | |
| 251 "sun.boot.library.path", | |
| 252 NULL | |
| 253 }; | |
| 254 | |
| 255 typedef struct { | |
| 256 const char** property_list; | |
| 257 CounterNS name_space; | |
| 258 } PropertyCounters; | |
| 259 | |
| 260 static PropertyCounters property_counters[] = { | |
| 261 { property_counters_ss, JAVA_PROPERTY }, | |
| 262 { property_counters_us, COM_PROPERTY }, | |
| 263 { property_counters_uu, SUN_PROPERTY }, | |
| 264 { NULL, SUN_PROPERTY } | |
| 265 }; | |
| 266 | |
| 267 | |
| 268 /* | |
| 269 * Method to create PerfData string instruments that contain the values | |
| 270 * of various system properties. String instruments are created for each | |
| 271 * property specified in the property lists provided in property_counters[]. | |
| 272 * Property counters have a counter name space prefix prepended to the | |
| 273 * property name as indicated in property_counters[]. | |
| 274 */ | |
| 275 void StatSampler::create_system_property_instrumentation(TRAPS) { | |
| 276 | |
| 277 ResourceMark rm; | |
| 278 | |
| 279 for (int i = 0; property_counters[i].property_list != NULL; i++) { | |
| 280 | |
| 281 for (int j = 0; property_counters[i].property_list[j] != NULL; j++) { | |
| 282 | |
| 283 const char* property_name = property_counters[i].property_list[j]; | |
| 284 assert(property_name != NULL, "property name should not be NULL"); | |
| 285 | |
| 286 const char* value = get_system_property(property_name, CHECK); | |
| 287 | |
| 288 // the property must exist | |
| 289 assert(value != NULL, "property name should be valid"); | |
| 290 | |
| 291 if (value != NULL) { | |
| 292 // create the property counter | |
| 293 PerfDataManager::create_string_constant(property_counters[i].name_space, | |
| 294 property_name, value, CHECK); | |
| 295 } | |
| 296 } | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 /* | |
| 301 * The create_misc_perfdata() method provides a place to create | |
| 302 * PerfData instances that would otherwise have no better place | |
| 303 * to exist. | |
| 304 */ | |
| 305 void StatSampler::create_misc_perfdata() { | |
| 306 | |
| 307 ResourceMark rm; | |
| 308 EXCEPTION_MARK; | |
| 309 | |
| 310 // numeric constants | |
| 311 | |
| 312 // frequency of the native high resolution timer | |
| 313 PerfDataManager::create_constant(SUN_OS, "hrt.frequency", | |
| 314 PerfData::U_Hertz, os::elapsed_frequency(), | |
| 315 CHECK); | |
| 316 | |
| 317 // string constants | |
| 318 | |
| 319 // create string instrumentation for various Java properties. | |
| 320 create_system_property_instrumentation(CHECK); | |
| 321 | |
| 322 // hotspot flags (from .hotspotrc) and args (from command line) | |
| 323 // | |
| 324 PerfDataManager::create_string_constant(JAVA_RT, "vmFlags", | |
| 325 Arguments::jvm_flags(), CHECK); | |
| 326 PerfDataManager::create_string_constant(JAVA_RT, "vmArgs", | |
| 327 Arguments::jvm_args(), CHECK); | |
| 328 | |
| 329 // java class name/jar file and arguments to main class | |
| 330 // note: name is cooridnated with launcher and Arguments.cpp | |
| 331 PerfDataManager::create_string_constant(SUN_RT, "javaCommand", | |
| 332 Arguments::java_command(), CHECK); | |
| 333 | |
| 334 // the Java VM Internal version string | |
| 335 PerfDataManager::create_string_constant(SUN_RT, "internalVersion", | |
| 336 VM_Version::internal_vm_info_string(), | |
| 337 CHECK); | |
| 338 | |
| 339 // create sampled instrumentation objects | |
| 340 create_sampled_perfdata(); | |
| 341 } | |
| 342 | |
| 343 /* | |
| 344 * helper class to provide for sampling of the elapsed_counter value | |
| 345 * maintained in the OS class. | |
| 346 */ | |
| 347 class HighResTimeSampler : public PerfSampleHelper { | |
| 348 public: | |
| 349 jlong take_sample() { return os::elapsed_counter(); } | |
| 350 }; | |
| 351 | |
| 352 /* | |
| 353 * the create_sampled_perdata() method provides a place to instantiate | |
| 354 * sampled PerfData instances that would otherwise have no better place | |
| 355 * to exist. | |
| 356 */ | |
| 357 void StatSampler::create_sampled_perfdata() { | |
| 358 | |
| 359 EXCEPTION_MARK; | |
| 360 | |
| 361 // setup sampling of the elapsed time counter maintained in the | |
| 362 // the os class. This counter can be used as either a time stamp | |
| 363 // for each logged entry or as a liveness indicator for the VM. | |
| 364 PerfSampleHelper* psh = new HighResTimeSampler(); | |
| 365 PerfDataManager::create_counter(SUN_OS, "hrt.ticks", | |
| 366 PerfData::U_Ticks, psh, CHECK); | |
| 367 } | |
| 368 | |
| 369 /* | |
| 370 * the statSampler_exit() function is called from os_init.cpp on | |
| 371 * exit of the vm. | |
| 372 */ | |
| 373 void statSampler_exit() { | |
| 374 | |
| 375 if (!UsePerfData) return; | |
| 376 | |
| 377 StatSampler::destroy(); | |
| 378 } |