Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.cpp @ 6273:4c8f2a12e757 hs24-b20
Merge
author | twisti |
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date | Fri, 10 Aug 2012 17:50:24 -0700 |
parents | 58a04a45a549 |
children | e5bf1c79ed5b |
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;) | |
68 debug_only(volatile jint MemTracker::_pending_recorder_count = 0;) | |
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; | |
74 } else if (strncmp(option_line, "=detail", 8) == 0) { | |
75 _tracking_level = NMT_detail; | |
76 } | |
77 } | |
78 | |
79 // first phase of bootstrapping, when VM is still in single-threaded mode. | |
80 void MemTracker::bootstrap_single_thread() { | |
81 if (_tracking_level > NMT_off) { | |
82 assert(_state == NMT_uninited, "wrong state"); | |
83 | |
84 // NMT is not supported with UseMallocOnly is on. NMT can NOT | |
85 // handle the amount of malloc data without significantly impacting | |
86 // runtime performance when this flag is on. | |
87 if (UseMallocOnly) { | |
88 shutdown(NMT_use_malloc_only); | |
89 return; | |
90 } | |
91 | |
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92 _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock"); |
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93 if (_query_lock == NULL) { |
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94 shutdown(NMT_out_of_memory); |
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95 return; |
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96 } |
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97 |
6197 | 98 debug_only(_main_thread_tid = os::current_thread_id();) |
99 _state = NMT_bootstrapping_single_thread; | |
100 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
101 } | |
102 } | |
103 | |
104 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. | |
105 void MemTracker::bootstrap_multi_thread() { | |
106 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { | |
107 // create nmt lock for multi-thread execution | |
108 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
109 _state = NMT_bootstrapping_multi_thread; | |
110 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
111 } | |
112 } | |
113 | |
114 // fully start nmt | |
115 void MemTracker::start() { | |
116 // Native memory tracking is off from command line option | |
117 if (_tracking_level == NMT_off || shutdown_in_progress()) return; | |
118 | |
119 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
120 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); | |
121 | |
122 _snapshot = new (std::nothrow)MemSnapshot(); | |
123 if (_snapshot != NULL && !_snapshot->out_of_memory()) { | |
124 if (start_worker()) { | |
125 _state = NMT_started; | |
126 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
127 return; | |
128 } | |
129 } | |
130 | |
131 // fail to start native memory tracking, shut it down | |
132 shutdown(NMT_initialization); | |
133 } | |
134 | |
135 /** | |
136 * Shutting down native memory tracking. | |
137 * We can not shutdown native memory tracking immediately, so we just | |
138 * setup shutdown pending flag, every native memory tracking component | |
139 * should orderly shut itself down. | |
140 * | |
141 * The shutdown sequences: | |
142 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state | |
143 * 2. Worker thread calls MemTracker::final_shutdown(), which transites | |
144 * MemTracker to final shutdown state. | |
145 * 3. At sync point, MemTracker does final cleanup, before sets memory | |
146 * tracking level to off to complete shutdown. | |
147 */ | |
148 void MemTracker::shutdown(ShutdownReason reason) { | |
149 if (_tracking_level == NMT_off) return; | |
150 | |
151 if (_state <= NMT_bootstrapping_single_thread) { | |
152 // we still in single thread mode, there is not contention | |
153 _state = NMT_shutdown_pending; | |
154 _reason = reason; | |
155 } else { | |
156 // we want to know who initialized shutdown | |
157 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, | |
158 (jint*)&_state, (jint)NMT_started)) { | |
159 _reason = reason; | |
160 } | |
161 } | |
162 } | |
163 | |
164 // final phase of shutdown | |
165 void MemTracker::final_shutdown() { | |
166 // delete all pending recorders and pooled recorders | |
167 delete_all_pending_recorders(); | |
168 delete_all_pooled_recorders(); | |
169 | |
170 { | |
171 // shared baseline and snapshot are the only objects needed to | |
172 // create query results | |
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173 MutexLockerEx locker(_query_lock, true); |
6197 | 174 // cleanup baseline data and snapshot |
175 _baseline.clear(); | |
176 delete _snapshot; | |
177 _snapshot = NULL; | |
178 } | |
179 | |
180 // shutdown shared decoder instance, since it is only | |
181 // used by native memory tracking so far. | |
182 Decoder::shutdown(); | |
183 | |
184 MemTrackWorker* worker = NULL; | |
185 { | |
186 ThreadCritical tc; | |
187 // can not delete worker inside the thread critical | |
188 if (_worker_thread != NULL && Thread::current() == _worker_thread) { | |
189 worker = _worker_thread; | |
190 _worker_thread = NULL; | |
191 } | |
192 } | |
193 if (worker != NULL) { | |
194 delete worker; | |
195 } | |
196 _state = NMT_final_shutdown; | |
197 } | |
198 | |
199 // delete all pooled recorders | |
200 void MemTracker::delete_all_pooled_recorders() { | |
201 // free all pooled recorders | |
202 volatile MemRecorder* cur_head = _pooled_recorders; | |
203 if (cur_head != NULL) { | |
204 MemRecorder* null_ptr = NULL; | |
205 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, | |
206 (void*)&_pooled_recorders, (void*)cur_head)) { | |
207 cur_head = _pooled_recorders; | |
208 } | |
209 if (cur_head != NULL) { | |
210 delete cur_head; | |
211 _pooled_recorder_count = 0; | |
212 } | |
213 } | |
214 } | |
215 | |
216 // delete all recorders in pending queue | |
217 void MemTracker::delete_all_pending_recorders() { | |
218 // free all pending recorders | |
219 MemRecorder* pending_head = get_pending_recorders(); | |
220 if (pending_head != NULL) { | |
221 delete pending_head; | |
222 } | |
223 } | |
224 | |
225 /* | |
226 * retrieve per-thread recorder of specified thread. | |
227 * if thread == NULL, it means global recorder | |
228 */ | |
229 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { | |
230 if (shutdown_in_progress()) return NULL; | |
231 | |
232 MemRecorder* rc; | |
233 if (thread == NULL) { | |
234 rc = _global_recorder; | |
235 } else { | |
236 rc = thread->get_recorder(); | |
237 } | |
238 | |
239 if (rc != NULL && rc->is_full()) { | |
240 enqueue_pending_recorder(rc); | |
241 rc = NULL; | |
242 } | |
243 | |
244 if (rc == NULL) { | |
245 rc = get_new_or_pooled_instance(); | |
246 if (thread == NULL) { | |
247 _global_recorder = rc; | |
248 } else { | |
249 thread->set_recorder(rc); | |
250 } | |
251 } | |
252 return rc; | |
253 } | |
254 | |
255 /* | |
256 * get a per-thread recorder from pool, or create a new one if | |
257 * there is not one available. | |
258 */ | |
259 MemRecorder* MemTracker::get_new_or_pooled_instance() { | |
260 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); | |
261 if (cur_head == NULL) { | |
262 MemRecorder* rec = new (std::nothrow)MemRecorder(); | |
263 if (rec == NULL || rec->out_of_memory()) { | |
264 shutdown(NMT_out_of_memory); | |
265 if (rec != NULL) { | |
266 delete rec; | |
267 rec = NULL; | |
268 } | |
269 } | |
270 return rec; | |
271 } else { | |
272 MemRecorder* next_head = cur_head->next(); | |
273 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, | |
274 (void*)cur_head)) { | |
275 return get_new_or_pooled_instance(); | |
276 } | |
277 cur_head->set_next(NULL); | |
278 Atomic::dec(&_pooled_recorder_count); | |
279 debug_only(cur_head->set_generation();) | |
280 return cur_head; | |
281 } | |
282 } | |
283 | |
284 /* | |
285 * retrieve all recorders in pending queue, and empty the queue | |
286 */ | |
287 MemRecorder* MemTracker::get_pending_recorders() { | |
288 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
289 MemRecorder* null_ptr = NULL; | |
290 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, | |
291 (void*)cur_head)) { | |
292 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
293 } | |
294 debug_only(Atomic::store(0, &_pending_recorder_count)); | |
295 return cur_head; | |
296 } | |
297 | |
298 /* | |
299 * release a recorder to recorder pool. | |
300 */ | |
301 void MemTracker::release_thread_recorder(MemRecorder* rec) { | |
302 assert(rec != NULL, "null recorder"); | |
303 // we don't want to pool too many recorders | |
304 rec->set_next(NULL); | |
305 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { | |
306 delete rec; | |
307 return; | |
308 } | |
309 | |
310 rec->clear(); | |
311 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
312 rec->set_next(cur_head); | |
313 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, | |
314 (void*)cur_head)) { | |
315 cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
316 rec->set_next(cur_head); | |
317 } | |
318 Atomic::inc(&_pooled_recorder_count); | |
319 } | |
320 | |
321 /* | |
322 * This is the most important method in whole nmt implementation. | |
323 * | |
324 * Create a memory record. | |
325 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM | |
326 * still in single thread mode. | |
327 * 2. For all threads other than JavaThread, ThreadCritical is needed | |
328 * to write to recorders to global recorder. | |
329 * 3. For JavaThreads that are not longer visible by safepoint, also | |
330 * need to take ThreadCritical and records are written to global | |
331 * recorders, since these threads are NOT walked by Threads.do_thread(). | |
332 * 4. JavaThreads that are running in native state, have to transition | |
333 * to VM state before writing to per-thread recorders. | |
334 * 5. JavaThreads that are running in VM state do not need any lock and | |
335 * records are written to per-thread recorders. | |
336 * 6. For a thread has yet to attach VM 'Thread', they need to take | |
337 * ThreadCritical to write to global recorder. | |
338 * | |
339 * Important note: | |
340 * NO LOCK should be taken inside ThreadCritical lock !!! | |
341 */ | |
342 void MemTracker::create_memory_record(address addr, MEMFLAGS flags, | |
343 size_t size, address pc, Thread* thread) { | |
344 if (!shutdown_in_progress()) { | |
345 // single thread, we just write records direct to global recorder,' | |
346 // with any lock | |
347 if (_state == NMT_bootstrapping_single_thread) { | |
348 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
349 thread = NULL; | |
350 } else { | |
351 if (thread == NULL) { | |
352 // don't use Thread::current(), since it is possible that | |
353 // the calling thread has yet to attach to VM 'Thread', | |
354 // which will result assertion failure | |
355 thread = ThreadLocalStorage::thread(); | |
356 } | |
357 } | |
358 | |
359 if (thread != NULL) { | |
360 if (thread->is_Java_thread() && ((JavaThread*)thread)->is_safepoint_visible()) { | |
6231 | 361 JavaThread* java_thread = static_cast<JavaThread*>(thread); |
362 JavaThreadState state = java_thread->thread_state(); | |
363 if (SafepointSynchronize::safepoint_safe(java_thread, state)) { | |
364 // JavaThreads that are safepoint safe, can run through safepoint, | |
365 // so ThreadCritical is needed to ensure no threads at safepoint create | |
366 // new records while the records are being gathered and the sequence number is changing | |
367 ThreadCritical tc; | |
368 create_record_in_recorder(addr, flags, size, pc, java_thread); | |
6197 | 369 } else { |
6231 | 370 create_record_in_recorder(addr, flags, size, pc, java_thread); |
6197 | 371 } |
372 } else { | |
373 // other threads, such as worker and watcher threads, etc. need to | |
374 // take ThreadCritical to write to global recorder | |
375 ThreadCritical tc; | |
376 create_record_in_recorder(addr, flags, size, pc, NULL); | |
377 } | |
378 } else { | |
379 if (_state == NMT_bootstrapping_single_thread) { | |
380 // single thread, no lock needed | |
381 create_record_in_recorder(addr, flags, size, pc, NULL); | |
382 } else { | |
383 // for thread has yet to attach VM 'Thread', we can not use VM mutex. | |
384 // use native thread critical instead | |
385 ThreadCritical tc; | |
386 create_record_in_recorder(addr, flags, size, pc, NULL); | |
387 } | |
388 } | |
389 } | |
390 } | |
391 | |
392 // write a record to proper recorder. No lock can be taken from this method | |
393 // down. | |
394 void MemTracker::create_record_in_recorder(address addr, MEMFLAGS flags, | |
6231 | 395 size_t size, address pc, JavaThread* thread) { |
6197 | 396 |
6231 | 397 MemRecorder* rc = get_thread_recorder(thread); |
6197 | 398 if (rc != NULL) { |
399 rc->record(addr, flags, size, pc); | |
400 } | |
401 } | |
402 | |
403 /** | |
404 * enqueue a recorder to pending queue | |
405 */ | |
406 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { | |
407 assert(rec != NULL, "null recorder"); | |
408 | |
409 // we are shutting down, so just delete it | |
410 if (shutdown_in_progress()) { | |
411 rec->set_next(NULL); | |
412 delete rec; | |
413 return; | |
414 } | |
415 | |
416 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
417 rec->set_next(cur_head); | |
418 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, | |
419 (void*)cur_head)) { | |
420 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
421 rec->set_next(cur_head); | |
422 } | |
423 debug_only(Atomic::inc(&_pending_recorder_count);) | |
424 } | |
425 | |
426 /* | |
427 * The method is called at global safepoint | |
428 * during it synchronization process. | |
429 * 1. enqueue all JavaThreads' per-thread recorders | |
430 * 2. enqueue global recorder | |
431 * 3. retrieve all pending recorders | |
432 * 4. reset global sequence number generator | |
433 * 5. call worker's sync | |
434 */ | |
435 #define MAX_SAFEPOINTS_TO_SKIP 128 | |
436 #define SAFE_SEQUENCE_THRESHOLD 30 | |
437 #define HIGH_GENERATION_THRESHOLD 60 | |
438 | |
439 void MemTracker::sync() { | |
440 assert(_tracking_level > NMT_off, "NMT is not enabled"); | |
441 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
442 | |
443 // Some GC tests hit large number of safepoints in short period of time | |
444 // without meaningful activities. We should prevent going to | |
445 // sync point in these cases, which can potentially exhaust generation buffer. | |
446 // Here is the factots to determine if we should go into sync point: | |
447 // 1. not to overflow sequence number | |
448 // 2. if we are in danger to overflow generation buffer | |
449 // 3. how many safepoints we already skipped sync point | |
450 if (_state == NMT_started) { | |
451 // worker thread is not ready, no one can manage generation | |
452 // buffer, so skip this safepoint | |
453 if (_worker_thread == NULL) return; | |
454 | |
455 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { | |
456 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; | |
457 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; | |
458 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { | |
459 _sync_point_skip_count ++; | |
460 return; | |
461 } | |
462 } | |
463 _sync_point_skip_count = 0; | |
464 { | |
465 // This method is running at safepoint, with ThreadCritical lock, | |
466 // it should guarantee that NMT is fully sync-ed. | |
467 ThreadCritical tc; | |
6231 | 468 |
469 // walk all JavaThreads to collect recorders | |
470 SyncThreadRecorderClosure stc; | |
471 Threads::threads_do(&stc); | |
472 | |
473 _thread_count = stc.get_thread_count(); | |
474 MemRecorder* pending_recorders = get_pending_recorders(); | |
475 | |
6197 | 476 if (_global_recorder != NULL) { |
477 _global_recorder->set_next(pending_recorders); | |
478 pending_recorders = _global_recorder; | |
479 _global_recorder = NULL; | |
480 } | |
481 SequenceGenerator::reset(); | |
482 // check _worker_thread with lock to avoid racing condition | |
483 if (_worker_thread != NULL) { | |
484 _worker_thread->at_sync_point(pending_recorders); | |
485 } | |
486 } | |
487 } | |
488 | |
489 // now, it is the time to shut whole things off | |
490 if (_state == NMT_final_shutdown) { | |
491 // walk all JavaThreads to delete all recorders | |
492 SyncThreadRecorderClosure stc; | |
493 Threads::threads_do(&stc); | |
494 // delete global recorder | |
495 { | |
496 ThreadCritical tc; | |
497 if (_global_recorder != NULL) { | |
498 delete _global_recorder; | |
499 _global_recorder = NULL; | |
500 } | |
501 } | |
6231 | 502 MemRecorder* pending_recorders = get_pending_recorders(); |
503 if (pending_recorders != NULL) { | |
504 delete pending_recorders; | |
505 } | |
506 // try at a later sync point to ensure MemRecorder instance drops to zero to | |
507 // completely shutdown NMT | |
508 if (MemRecorder::_instance_count == 0) { | |
509 _state = NMT_shutdown; | |
510 _tracking_level = NMT_off; | |
511 } | |
6197 | 512 } |
513 } | |
514 | |
515 /* | |
516 * Start worker thread. | |
517 */ | |
518 bool MemTracker::start_worker() { | |
519 assert(_worker_thread == NULL, "Just Check"); | |
520 _worker_thread = new (std::nothrow) MemTrackWorker(); | |
521 if (_worker_thread == NULL || _worker_thread->has_error()) { | |
522 shutdown(NMT_initialization); | |
523 return false; | |
524 } | |
525 _worker_thread->start(); | |
526 return true; | |
527 } | |
528 | |
529 /* | |
530 * We need to collect a JavaThread's per-thread recorder | |
531 * before it exits. | |
532 */ | |
533 void MemTracker::thread_exiting(JavaThread* thread) { | |
534 if (is_on()) { | |
535 MemRecorder* rec = thread->get_recorder(); | |
536 if (rec != NULL) { | |
537 enqueue_pending_recorder(rec); | |
538 thread->set_recorder(NULL); | |
539 } | |
540 } | |
541 } | |
542 | |
543 // baseline current memory snapshot | |
544 bool MemTracker::baseline() { | |
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545 MutexLockerEx lock(_query_lock, true); |
6197 | 546 MemSnapshot* snapshot = get_snapshot(); |
547 if (snapshot != NULL) { | |
548 return _baseline.baseline(*snapshot, false); | |
549 } | |
550 return false; | |
551 } | |
552 | |
553 // print memory usage from current snapshot | |
554 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
555 MemBaseline baseline; | |
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556 MutexLockerEx lock(_query_lock, true); |
6197 | 557 MemSnapshot* snapshot = get_snapshot(); |
558 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
559 BaselineReporter reporter(out, unit); | |
560 reporter.report_baseline(baseline, summary_only); | |
561 return true; | |
562 } | |
563 return false; | |
564 } | |
565 | |
566 // compare memory usage between current snapshot and baseline | |
567 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
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568 MutexLockerEx lock(_query_lock, true); |
6197 | 569 if (_baseline.baselined()) { |
570 MemBaseline baseline; | |
571 MemSnapshot* snapshot = get_snapshot(); | |
572 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
573 BaselineReporter reporter(out, unit); | |
574 reporter.diff_baselines(baseline, _baseline, summary_only); | |
575 return true; | |
576 } | |
577 } | |
578 return false; | |
579 } | |
580 | |
581 #ifndef PRODUCT | |
582 void MemTracker::walk_stack(int toSkip, char* buf, int len) { | |
583 int cur_len = 0; | |
584 char tmp[1024]; | |
585 address pc; | |
586 | |
587 while (cur_len < len) { | |
588 pc = os::get_caller_pc(toSkip + 1); | |
589 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { | |
590 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); | |
591 cur_len = (int)strlen(buf); | |
592 } else { | |
593 buf[cur_len] = '\0'; | |
594 break; | |
595 } | |
596 toSkip ++; | |
597 } | |
598 } | |
599 | |
600 void MemTracker::print_tracker_stats(outputStream* st) { | |
601 st->print_cr("\nMemory Tracker Stats:"); | |
602 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); | |
603 st->print_cr("\tthead count = %d", _thread_count); | |
604 st->print_cr("\tArena instance = %d", Arena::_instance_count); | |
605 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); | |
606 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); | |
607 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); | |
608 if (_worker_thread != NULL) { | |
609 st->print_cr("\tWorker thread:"); | |
610 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); | |
611 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); | |
612 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); | |
613 } else { | |
614 st->print_cr("\tWorker thread is not started"); | |
615 } | |
616 st->print_cr(" "); | |
617 | |
618 if (_snapshot != NULL) { | |
619 _snapshot->print_snapshot_stats(st); | |
620 } else { | |
621 st->print_cr("No snapshot"); | |
622 } | |
623 } | |
624 #endif | |
625 |