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annotate src/share/vm/runtime/statSampler.cpp @ 2182:9569fdf936ff
Made merge compile.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Wed, 16 Feb 2011 14:21:52 +0100 |
parents | 3582bf76420e |
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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()), |
2177
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199 vmSymbols::getProperty_name(), |
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200 vmSymbols::string_string_signature(), |
0 | 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", | |
279
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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 } |