Mercurial > hg > graal-compiler
annotate src/share/vm/services/memTracker.cpp @ 7183:b2dbd323c668
8003848: Make ConstMethod::generic_signature_index optional and move Method::_max_stack to ConstMethod.
Summary: Make ConstMethod::generic_signature_index optional and move Method::_max_stack to ConstMethod.
Reviewed-by: bdelsart, sspitsyn, coleenp
author | jiangli |
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date | Tue, 27 Nov 2012 17:03:56 -0500 |
parents | 716c64bda5ba |
children | bbc14465e7db |
rev | line source |
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6197 | 1 /* |
2 * Copyright (c) 2012, 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 #include "precompiled.hpp" | |
25 | |
26 #include "runtime/atomic.hpp" | |
27 #include "runtime/interfaceSupport.hpp" | |
28 #include "runtime/mutexLocker.hpp" | |
29 #include "runtime/safepoint.hpp" | |
30 #include "runtime/threadCritical.hpp" | |
31 #include "services/memPtr.hpp" | |
32 #include "services/memReporter.hpp" | |
33 #include "services/memTracker.hpp" | |
34 #include "utilities/decoder.hpp" | |
35 #include "utilities/globalDefinitions.hpp" | |
36 | |
37 bool NMT_track_callsite = false; | |
38 | |
39 // walk all 'known' threads at NMT sync point, and collect their recorders | |
40 void SyncThreadRecorderClosure::do_thread(Thread* thread) { | |
41 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
42 if (thread->is_Java_thread()) { | |
43 JavaThread* javaThread = (JavaThread*)thread; | |
44 MemRecorder* recorder = javaThread->get_recorder(); | |
45 if (recorder != NULL) { | |
46 MemTracker::enqueue_pending_recorder(recorder); | |
47 javaThread->set_recorder(NULL); | |
48 } | |
49 } | |
50 _thread_count ++; | |
51 } | |
52 | |
53 | |
54 MemRecorder* MemTracker::_global_recorder = NULL; | |
55 MemSnapshot* MemTracker::_snapshot = NULL; | |
56 MemBaseline MemTracker::_baseline; | |
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57 Mutex* MemTracker::_query_lock = NULL; |
6197 | 58 volatile MemRecorder* MemTracker::_merge_pending_queue = NULL; |
59 volatile MemRecorder* MemTracker::_pooled_recorders = NULL; | |
60 MemTrackWorker* MemTracker::_worker_thread = NULL; | |
61 int MemTracker::_sync_point_skip_count = 0; | |
62 MemTracker::NMTLevel MemTracker::_tracking_level = MemTracker::NMT_off; | |
63 volatile MemTracker::NMTStates MemTracker::_state = NMT_uninited; | |
64 MemTracker::ShutdownReason MemTracker::_reason = NMT_shutdown_none; | |
65 int MemTracker::_thread_count = 255; | |
66 volatile jint MemTracker::_pooled_recorder_count = 0; | |
67 debug_only(intx MemTracker::_main_thread_tid = 0;) | |
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68 NOT_PRODUCT(volatile jint MemTracker::_pending_recorder_count = 0;) |
6197 | 69 |
70 void MemTracker::init_tracking_options(const char* option_line) { | |
71 _tracking_level = NMT_off; | |
72 if (strncmp(option_line, "=summary", 8) == 0) { | |
73 _tracking_level = NMT_summary; | |
6781 | 74 } else if (strncmp(option_line, "=detail", 7) == 0) { |
6197 | 75 _tracking_level = NMT_detail; |
6781 | 76 } else { |
77 char msg[255]; | |
78 //+1 to remove the '=' character | |
79 jio_snprintf(msg, 255, "Unknown option given to XX:NativeMemoryTracking: %s", option_line+1); | |
80 vm_exit_during_initialization(msg, NULL); | |
6197 | 81 } |
82 } | |
83 | |
84 // first phase of bootstrapping, when VM is still in single-threaded mode. | |
85 void MemTracker::bootstrap_single_thread() { | |
86 if (_tracking_level > NMT_off) { | |
87 assert(_state == NMT_uninited, "wrong state"); | |
88 | |
89 // NMT is not supported with UseMallocOnly is on. NMT can NOT | |
90 // handle the amount of malloc data without significantly impacting | |
91 // runtime performance when this flag is on. | |
92 if (UseMallocOnly) { | |
93 shutdown(NMT_use_malloc_only); | |
94 return; | |
95 } | |
96 | |
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97 _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock"); |
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98 if (_query_lock == NULL) { |
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99 shutdown(NMT_out_of_memory); |
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100 return; |
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101 } |
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102 |
6197 | 103 debug_only(_main_thread_tid = os::current_thread_id();) |
104 _state = NMT_bootstrapping_single_thread; | |
105 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
106 } | |
107 } | |
108 | |
109 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. | |
110 void MemTracker::bootstrap_multi_thread() { | |
111 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { | |
112 // create nmt lock for multi-thread execution | |
113 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
114 _state = NMT_bootstrapping_multi_thread; | |
115 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
116 } | |
117 } | |
118 | |
119 // fully start nmt | |
120 void MemTracker::start() { | |
121 // Native memory tracking is off from command line option | |
122 if (_tracking_level == NMT_off || shutdown_in_progress()) return; | |
123 | |
124 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
125 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); | |
126 | |
127 _snapshot = new (std::nothrow)MemSnapshot(); | |
128 if (_snapshot != NULL && !_snapshot->out_of_memory()) { | |
129 if (start_worker()) { | |
130 _state = NMT_started; | |
131 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
132 return; | |
133 } | |
134 } | |
135 | |
136 // fail to start native memory tracking, shut it down | |
137 shutdown(NMT_initialization); | |
138 } | |
139 | |
140 /** | |
141 * Shutting down native memory tracking. | |
142 * We can not shutdown native memory tracking immediately, so we just | |
143 * setup shutdown pending flag, every native memory tracking component | |
144 * should orderly shut itself down. | |
145 * | |
146 * The shutdown sequences: | |
147 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state | |
148 * 2. Worker thread calls MemTracker::final_shutdown(), which transites | |
149 * MemTracker to final shutdown state. | |
150 * 3. At sync point, MemTracker does final cleanup, before sets memory | |
151 * tracking level to off to complete shutdown. | |
152 */ | |
153 void MemTracker::shutdown(ShutdownReason reason) { | |
154 if (_tracking_level == NMT_off) return; | |
155 | |
156 if (_state <= NMT_bootstrapping_single_thread) { | |
157 // we still in single thread mode, there is not contention | |
158 _state = NMT_shutdown_pending; | |
159 _reason = reason; | |
160 } else { | |
161 // we want to know who initialized shutdown | |
162 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, | |
163 (jint*)&_state, (jint)NMT_started)) { | |
164 _reason = reason; | |
165 } | |
166 } | |
167 } | |
168 | |
169 // final phase of shutdown | |
170 void MemTracker::final_shutdown() { | |
171 // delete all pending recorders and pooled recorders | |
172 delete_all_pending_recorders(); | |
173 delete_all_pooled_recorders(); | |
174 | |
175 { | |
176 // shared baseline and snapshot are the only objects needed to | |
177 // create query results | |
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178 MutexLockerEx locker(_query_lock, true); |
6197 | 179 // cleanup baseline data and snapshot |
180 _baseline.clear(); | |
181 delete _snapshot; | |
182 _snapshot = NULL; | |
183 } | |
184 | |
185 // shutdown shared decoder instance, since it is only | |
186 // used by native memory tracking so far. | |
187 Decoder::shutdown(); | |
188 | |
189 MemTrackWorker* worker = NULL; | |
190 { | |
191 ThreadCritical tc; | |
192 // can not delete worker inside the thread critical | |
193 if (_worker_thread != NULL && Thread::current() == _worker_thread) { | |
194 worker = _worker_thread; | |
195 _worker_thread = NULL; | |
196 } | |
197 } | |
198 if (worker != NULL) { | |
199 delete worker; | |
200 } | |
201 _state = NMT_final_shutdown; | |
202 } | |
203 | |
204 // delete all pooled recorders | |
205 void MemTracker::delete_all_pooled_recorders() { | |
206 // free all pooled recorders | |
207 volatile MemRecorder* cur_head = _pooled_recorders; | |
208 if (cur_head != NULL) { | |
209 MemRecorder* null_ptr = NULL; | |
210 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, | |
211 (void*)&_pooled_recorders, (void*)cur_head)) { | |
212 cur_head = _pooled_recorders; | |
213 } | |
214 if (cur_head != NULL) { | |
215 delete cur_head; | |
216 _pooled_recorder_count = 0; | |
217 } | |
218 } | |
219 } | |
220 | |
221 // delete all recorders in pending queue | |
222 void MemTracker::delete_all_pending_recorders() { | |
223 // free all pending recorders | |
224 MemRecorder* pending_head = get_pending_recorders(); | |
225 if (pending_head != NULL) { | |
226 delete pending_head; | |
227 } | |
228 } | |
229 | |
230 /* | |
231 * retrieve per-thread recorder of specified thread. | |
232 * if thread == NULL, it means global recorder | |
233 */ | |
234 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { | |
235 if (shutdown_in_progress()) return NULL; | |
236 | |
237 MemRecorder* rc; | |
238 if (thread == NULL) { | |
239 rc = _global_recorder; | |
240 } else { | |
241 rc = thread->get_recorder(); | |
242 } | |
243 | |
244 if (rc != NULL && rc->is_full()) { | |
245 enqueue_pending_recorder(rc); | |
246 rc = NULL; | |
247 } | |
248 | |
249 if (rc == NULL) { | |
250 rc = get_new_or_pooled_instance(); | |
251 if (thread == NULL) { | |
252 _global_recorder = rc; | |
253 } else { | |
254 thread->set_recorder(rc); | |
255 } | |
256 } | |
257 return rc; | |
258 } | |
259 | |
260 /* | |
261 * get a per-thread recorder from pool, or create a new one if | |
262 * there is not one available. | |
263 */ | |
264 MemRecorder* MemTracker::get_new_or_pooled_instance() { | |
265 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); | |
266 if (cur_head == NULL) { | |
267 MemRecorder* rec = new (std::nothrow)MemRecorder(); | |
268 if (rec == NULL || rec->out_of_memory()) { | |
269 shutdown(NMT_out_of_memory); | |
270 if (rec != NULL) { | |
271 delete rec; | |
272 rec = NULL; | |
273 } | |
274 } | |
275 return rec; | |
276 } else { | |
277 MemRecorder* next_head = cur_head->next(); | |
278 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, | |
279 (void*)cur_head)) { | |
280 return get_new_or_pooled_instance(); | |
281 } | |
282 cur_head->set_next(NULL); | |
283 Atomic::dec(&_pooled_recorder_count); | |
284 debug_only(cur_head->set_generation();) | |
285 return cur_head; | |
286 } | |
287 } | |
288 | |
289 /* | |
290 * retrieve all recorders in pending queue, and empty the queue | |
291 */ | |
292 MemRecorder* MemTracker::get_pending_recorders() { | |
293 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
294 MemRecorder* null_ptr = NULL; | |
295 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, | |
296 (void*)cur_head)) { | |
297 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
298 } | |
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299 NOT_PRODUCT(Atomic::store(0, &_pending_recorder_count)); |
6197 | 300 return cur_head; |
301 } | |
302 | |
303 /* | |
304 * release a recorder to recorder pool. | |
305 */ | |
306 void MemTracker::release_thread_recorder(MemRecorder* rec) { | |
307 assert(rec != NULL, "null recorder"); | |
308 // we don't want to pool too many recorders | |
309 rec->set_next(NULL); | |
310 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { | |
311 delete rec; | |
312 return; | |
313 } | |
314 | |
315 rec->clear(); | |
316 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
317 rec->set_next(cur_head); | |
318 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, | |
319 (void*)cur_head)) { | |
320 cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
321 rec->set_next(cur_head); | |
322 } | |
323 Atomic::inc(&_pooled_recorder_count); | |
324 } | |
325 | |
326 /* | |
327 * This is the most important method in whole nmt implementation. | |
328 * | |
329 * Create a memory record. | |
330 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM | |
331 * still in single thread mode. | |
332 * 2. For all threads other than JavaThread, ThreadCritical is needed | |
333 * to write to recorders to global recorder. | |
334 * 3. For JavaThreads that are not longer visible by safepoint, also | |
335 * need to take ThreadCritical and records are written to global | |
336 * recorders, since these threads are NOT walked by Threads.do_thread(). | |
337 * 4. JavaThreads that are running in native state, have to transition | |
338 * to VM state before writing to per-thread recorders. | |
339 * 5. JavaThreads that are running in VM state do not need any lock and | |
340 * records are written to per-thread recorders. | |
341 * 6. For a thread has yet to attach VM 'Thread', they need to take | |
342 * ThreadCritical to write to global recorder. | |
343 * | |
344 * Important note: | |
345 * NO LOCK should be taken inside ThreadCritical lock !!! | |
346 */ | |
347 void MemTracker::create_memory_record(address addr, MEMFLAGS flags, | |
348 size_t size, address pc, Thread* thread) { | |
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349 assert(addr != NULL, "Sanity check"); |
6197 | 350 if (!shutdown_in_progress()) { |
351 // single thread, we just write records direct to global recorder,' | |
352 // with any lock | |
353 if (_state == NMT_bootstrapping_single_thread) { | |
354 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
355 thread = NULL; | |
356 } else { | |
357 if (thread == NULL) { | |
358 // don't use Thread::current(), since it is possible that | |
359 // the calling thread has yet to attach to VM 'Thread', | |
360 // which will result assertion failure | |
361 thread = ThreadLocalStorage::thread(); | |
362 } | |
363 } | |
364 | |
365 if (thread != NULL) { | |
366 if (thread->is_Java_thread() && ((JavaThread*)thread)->is_safepoint_visible()) { | |
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367 JavaThread* java_thread = (JavaThread*)thread; |
6231 | 368 JavaThreadState state = java_thread->thread_state(); |
369 if (SafepointSynchronize::safepoint_safe(java_thread, state)) { | |
370 // JavaThreads that are safepoint safe, can run through safepoint, | |
371 // so ThreadCritical is needed to ensure no threads at safepoint create | |
372 // new records while the records are being gathered and the sequence number is changing | |
373 ThreadCritical tc; | |
374 create_record_in_recorder(addr, flags, size, pc, java_thread); | |
6197 | 375 } else { |
6231 | 376 create_record_in_recorder(addr, flags, size, pc, java_thread); |
6197 | 377 } |
378 } else { | |
379 // other threads, such as worker and watcher threads, etc. need to | |
380 // take ThreadCritical to write to global recorder | |
381 ThreadCritical tc; | |
382 create_record_in_recorder(addr, flags, size, pc, NULL); | |
383 } | |
384 } else { | |
385 if (_state == NMT_bootstrapping_single_thread) { | |
386 // single thread, no lock needed | |
387 create_record_in_recorder(addr, flags, size, pc, NULL); | |
388 } else { | |
389 // for thread has yet to attach VM 'Thread', we can not use VM mutex. | |
390 // use native thread critical instead | |
391 ThreadCritical tc; | |
392 create_record_in_recorder(addr, flags, size, pc, NULL); | |
393 } | |
394 } | |
395 } | |
396 } | |
397 | |
398 // write a record to proper recorder. No lock can be taken from this method | |
399 // down. | |
400 void MemTracker::create_record_in_recorder(address addr, MEMFLAGS flags, | |
6231 | 401 size_t size, address pc, JavaThread* thread) { |
6197 | 402 |
6231 | 403 MemRecorder* rc = get_thread_recorder(thread); |
6197 | 404 if (rc != NULL) { |
405 rc->record(addr, flags, size, pc); | |
406 } | |
407 } | |
408 | |
409 /** | |
410 * enqueue a recorder to pending queue | |
411 */ | |
412 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { | |
413 assert(rec != NULL, "null recorder"); | |
414 | |
415 // we are shutting down, so just delete it | |
416 if (shutdown_in_progress()) { | |
417 rec->set_next(NULL); | |
418 delete rec; | |
419 return; | |
420 } | |
421 | |
422 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
423 rec->set_next(cur_head); | |
424 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, | |
425 (void*)cur_head)) { | |
426 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
427 rec->set_next(cur_head); | |
428 } | |
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429 NOT_PRODUCT(Atomic::inc(&_pending_recorder_count);) |
6197 | 430 } |
431 | |
432 /* | |
433 * The method is called at global safepoint | |
434 * during it synchronization process. | |
435 * 1. enqueue all JavaThreads' per-thread recorders | |
436 * 2. enqueue global recorder | |
437 * 3. retrieve all pending recorders | |
438 * 4. reset global sequence number generator | |
439 * 5. call worker's sync | |
440 */ | |
441 #define MAX_SAFEPOINTS_TO_SKIP 128 | |
442 #define SAFE_SEQUENCE_THRESHOLD 30 | |
443 #define HIGH_GENERATION_THRESHOLD 60 | |
444 | |
445 void MemTracker::sync() { | |
446 assert(_tracking_level > NMT_off, "NMT is not enabled"); | |
447 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
448 | |
449 // Some GC tests hit large number of safepoints in short period of time | |
450 // without meaningful activities. We should prevent going to | |
451 // sync point in these cases, which can potentially exhaust generation buffer. | |
452 // Here is the factots to determine if we should go into sync point: | |
453 // 1. not to overflow sequence number | |
454 // 2. if we are in danger to overflow generation buffer | |
455 // 3. how many safepoints we already skipped sync point | |
456 if (_state == NMT_started) { | |
457 // worker thread is not ready, no one can manage generation | |
458 // buffer, so skip this safepoint | |
459 if (_worker_thread == NULL) return; | |
460 | |
461 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { | |
462 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; | |
463 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; | |
464 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { | |
465 _sync_point_skip_count ++; | |
466 return; | |
467 } | |
468 } | |
469 _sync_point_skip_count = 0; | |
470 { | |
471 // This method is running at safepoint, with ThreadCritical lock, | |
472 // it should guarantee that NMT is fully sync-ed. | |
473 ThreadCritical tc; | |
6231 | 474 |
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475 SequenceGenerator::reset(); |
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476 |
6231 | 477 // walk all JavaThreads to collect recorders |
478 SyncThreadRecorderClosure stc; | |
479 Threads::threads_do(&stc); | |
480 | |
481 _thread_count = stc.get_thread_count(); | |
482 MemRecorder* pending_recorders = get_pending_recorders(); | |
483 | |
6197 | 484 if (_global_recorder != NULL) { |
485 _global_recorder->set_next(pending_recorders); | |
486 pending_recorders = _global_recorder; | |
487 _global_recorder = NULL; | |
488 } | |
489 // check _worker_thread with lock to avoid racing condition | |
490 if (_worker_thread != NULL) { | |
491 _worker_thread->at_sync_point(pending_recorders); | |
492 } | |
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493 |
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494 assert(SequenceGenerator::peek() == 1, "Should not have memory activities during sync-point"); |
6197 | 495 } |
496 } | |
497 | |
498 // now, it is the time to shut whole things off | |
499 if (_state == NMT_final_shutdown) { | |
500 // walk all JavaThreads to delete all recorders | |
501 SyncThreadRecorderClosure stc; | |
502 Threads::threads_do(&stc); | |
503 // delete global recorder | |
504 { | |
505 ThreadCritical tc; | |
506 if (_global_recorder != NULL) { | |
507 delete _global_recorder; | |
508 _global_recorder = NULL; | |
509 } | |
510 } | |
6231 | 511 MemRecorder* pending_recorders = get_pending_recorders(); |
512 if (pending_recorders != NULL) { | |
513 delete pending_recorders; | |
514 } | |
515 // try at a later sync point to ensure MemRecorder instance drops to zero to | |
516 // completely shutdown NMT | |
517 if (MemRecorder::_instance_count == 0) { | |
518 _state = NMT_shutdown; | |
519 _tracking_level = NMT_off; | |
520 } | |
6197 | 521 } |
522 } | |
523 | |
524 /* | |
525 * Start worker thread. | |
526 */ | |
527 bool MemTracker::start_worker() { | |
528 assert(_worker_thread == NULL, "Just Check"); | |
529 _worker_thread = new (std::nothrow) MemTrackWorker(); | |
530 if (_worker_thread == NULL || _worker_thread->has_error()) { | |
531 shutdown(NMT_initialization); | |
532 return false; | |
533 } | |
534 _worker_thread->start(); | |
535 return true; | |
536 } | |
537 | |
538 /* | |
539 * We need to collect a JavaThread's per-thread recorder | |
540 * before it exits. | |
541 */ | |
542 void MemTracker::thread_exiting(JavaThread* thread) { | |
543 if (is_on()) { | |
544 MemRecorder* rec = thread->get_recorder(); | |
545 if (rec != NULL) { | |
546 enqueue_pending_recorder(rec); | |
547 thread->set_recorder(NULL); | |
548 } | |
549 } | |
550 } | |
551 | |
552 // baseline current memory snapshot | |
553 bool MemTracker::baseline() { | |
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554 MutexLockerEx lock(_query_lock, true); |
6197 | 555 MemSnapshot* snapshot = get_snapshot(); |
556 if (snapshot != NULL) { | |
557 return _baseline.baseline(*snapshot, false); | |
558 } | |
559 return false; | |
560 } | |
561 | |
562 // print memory usage from current snapshot | |
563 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
564 MemBaseline baseline; | |
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565 MutexLockerEx lock(_query_lock, true); |
6197 | 566 MemSnapshot* snapshot = get_snapshot(); |
567 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
568 BaselineReporter reporter(out, unit); | |
569 reporter.report_baseline(baseline, summary_only); | |
570 return true; | |
571 } | |
572 return false; | |
573 } | |
574 | |
575 // compare memory usage between current snapshot and baseline | |
576 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
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577 MutexLockerEx lock(_query_lock, true); |
6197 | 578 if (_baseline.baselined()) { |
579 MemBaseline baseline; | |
580 MemSnapshot* snapshot = get_snapshot(); | |
581 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
582 BaselineReporter reporter(out, unit); | |
583 reporter.diff_baselines(baseline, _baseline, summary_only); | |
584 return true; | |
585 } | |
586 } | |
587 return false; | |
588 } | |
589 | |
590 #ifndef PRODUCT | |
591 void MemTracker::walk_stack(int toSkip, char* buf, int len) { | |
592 int cur_len = 0; | |
593 char tmp[1024]; | |
594 address pc; | |
595 | |
596 while (cur_len < len) { | |
597 pc = os::get_caller_pc(toSkip + 1); | |
598 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { | |
599 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); | |
600 cur_len = (int)strlen(buf); | |
601 } else { | |
602 buf[cur_len] = '\0'; | |
603 break; | |
604 } | |
605 toSkip ++; | |
606 } | |
607 } | |
608 | |
609 void MemTracker::print_tracker_stats(outputStream* st) { | |
610 st->print_cr("\nMemory Tracker Stats:"); | |
611 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); | |
612 st->print_cr("\tthead count = %d", _thread_count); | |
613 st->print_cr("\tArena instance = %d", Arena::_instance_count); | |
614 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); | |
615 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); | |
616 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); | |
617 if (_worker_thread != NULL) { | |
618 st->print_cr("\tWorker thread:"); | |
619 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); | |
620 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); | |
621 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); | |
622 } else { | |
623 st->print_cr("\tWorker thread is not started"); | |
624 } | |
625 st->print_cr(" "); | |
626 | |
627 if (_snapshot != NULL) { | |
628 _snapshot->print_snapshot_stats(st); | |
629 } else { | |
630 st->print_cr("No snapshot"); | |
631 } | |
632 } | |
633 #endif | |
634 |