Mercurial > hg > graal-compiler
annotate src/share/vm/services/memTracker.cpp @ 7462:ade95d680b42
8004728: Add hotspot support for parameter reflection
Summary: Add hotspot support for parameter reflection
Reviewed-by: acorn, jrose, coleenp
Contributed-by: eric.mccorkle@oracle.com
author | coleenp |
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date | Tue, 08 Jan 2013 14:01:36 -0500 |
parents | bbc14465e7db |
children | ecd24264898b |
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; | |
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72 if (strcmp(option_line, "=summary") == 0) { |
6197 | 73 _tracking_level = NMT_summary; |
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74 } else if (strcmp(option_line, "=detail") == 0) { |
6197 | 75 _tracking_level = NMT_detail; |
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76 } else if (strcmp(option_line, "=off") != 0) { |
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77 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); |
6197 | 78 } |
79 } | |
80 | |
81 // first phase of bootstrapping, when VM is still in single-threaded mode. | |
82 void MemTracker::bootstrap_single_thread() { | |
83 if (_tracking_level > NMT_off) { | |
84 assert(_state == NMT_uninited, "wrong state"); | |
85 | |
86 // NMT is not supported with UseMallocOnly is on. NMT can NOT | |
87 // handle the amount of malloc data without significantly impacting | |
88 // runtime performance when this flag is on. | |
89 if (UseMallocOnly) { | |
90 shutdown(NMT_use_malloc_only); | |
91 return; | |
92 } | |
93 | |
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94 _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock"); |
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95 if (_query_lock == NULL) { |
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96 shutdown(NMT_out_of_memory); |
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97 return; |
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98 } |
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99 |
6197 | 100 debug_only(_main_thread_tid = os::current_thread_id();) |
101 _state = NMT_bootstrapping_single_thread; | |
102 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
103 } | |
104 } | |
105 | |
106 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. | |
107 void MemTracker::bootstrap_multi_thread() { | |
108 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { | |
109 // create nmt lock for multi-thread execution | |
110 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
111 _state = NMT_bootstrapping_multi_thread; | |
112 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
113 } | |
114 } | |
115 | |
116 // fully start nmt | |
117 void MemTracker::start() { | |
118 // Native memory tracking is off from command line option | |
119 if (_tracking_level == NMT_off || shutdown_in_progress()) return; | |
120 | |
121 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
122 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); | |
123 | |
124 _snapshot = new (std::nothrow)MemSnapshot(); | |
125 if (_snapshot != NULL && !_snapshot->out_of_memory()) { | |
126 if (start_worker()) { | |
127 _state = NMT_started; | |
128 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
129 return; | |
130 } | |
131 } | |
132 | |
133 // fail to start native memory tracking, shut it down | |
134 shutdown(NMT_initialization); | |
135 } | |
136 | |
137 /** | |
138 * Shutting down native memory tracking. | |
139 * We can not shutdown native memory tracking immediately, so we just | |
140 * setup shutdown pending flag, every native memory tracking component | |
141 * should orderly shut itself down. | |
142 * | |
143 * The shutdown sequences: | |
144 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state | |
145 * 2. Worker thread calls MemTracker::final_shutdown(), which transites | |
146 * MemTracker to final shutdown state. | |
147 * 3. At sync point, MemTracker does final cleanup, before sets memory | |
148 * tracking level to off to complete shutdown. | |
149 */ | |
150 void MemTracker::shutdown(ShutdownReason reason) { | |
151 if (_tracking_level == NMT_off) return; | |
152 | |
153 if (_state <= NMT_bootstrapping_single_thread) { | |
154 // we still in single thread mode, there is not contention | |
155 _state = NMT_shutdown_pending; | |
156 _reason = reason; | |
157 } else { | |
158 // we want to know who initialized shutdown | |
159 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, | |
160 (jint*)&_state, (jint)NMT_started)) { | |
161 _reason = reason; | |
162 } | |
163 } | |
164 } | |
165 | |
166 // final phase of shutdown | |
167 void MemTracker::final_shutdown() { | |
168 // delete all pending recorders and pooled recorders | |
169 delete_all_pending_recorders(); | |
170 delete_all_pooled_recorders(); | |
171 | |
172 { | |
173 // shared baseline and snapshot are the only objects needed to | |
174 // create query results | |
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175 MutexLockerEx locker(_query_lock, true); |
6197 | 176 // cleanup baseline data and snapshot |
177 _baseline.clear(); | |
178 delete _snapshot; | |
179 _snapshot = NULL; | |
180 } | |
181 | |
182 // shutdown shared decoder instance, since it is only | |
183 // used by native memory tracking so far. | |
184 Decoder::shutdown(); | |
185 | |
186 MemTrackWorker* worker = NULL; | |
187 { | |
188 ThreadCritical tc; | |
189 // can not delete worker inside the thread critical | |
190 if (_worker_thread != NULL && Thread::current() == _worker_thread) { | |
191 worker = _worker_thread; | |
192 _worker_thread = NULL; | |
193 } | |
194 } | |
195 if (worker != NULL) { | |
196 delete worker; | |
197 } | |
198 _state = NMT_final_shutdown; | |
199 } | |
200 | |
201 // delete all pooled recorders | |
202 void MemTracker::delete_all_pooled_recorders() { | |
203 // free all pooled recorders | |
204 volatile MemRecorder* cur_head = _pooled_recorders; | |
205 if (cur_head != NULL) { | |
206 MemRecorder* null_ptr = NULL; | |
207 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, | |
208 (void*)&_pooled_recorders, (void*)cur_head)) { | |
209 cur_head = _pooled_recorders; | |
210 } | |
211 if (cur_head != NULL) { | |
212 delete cur_head; | |
213 _pooled_recorder_count = 0; | |
214 } | |
215 } | |
216 } | |
217 | |
218 // delete all recorders in pending queue | |
219 void MemTracker::delete_all_pending_recorders() { | |
220 // free all pending recorders | |
221 MemRecorder* pending_head = get_pending_recorders(); | |
222 if (pending_head != NULL) { | |
223 delete pending_head; | |
224 } | |
225 } | |
226 | |
227 /* | |
228 * retrieve per-thread recorder of specified thread. | |
229 * if thread == NULL, it means global recorder | |
230 */ | |
231 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { | |
232 if (shutdown_in_progress()) return NULL; | |
233 | |
234 MemRecorder* rc; | |
235 if (thread == NULL) { | |
236 rc = _global_recorder; | |
237 } else { | |
238 rc = thread->get_recorder(); | |
239 } | |
240 | |
241 if (rc != NULL && rc->is_full()) { | |
242 enqueue_pending_recorder(rc); | |
243 rc = NULL; | |
244 } | |
245 | |
246 if (rc == NULL) { | |
247 rc = get_new_or_pooled_instance(); | |
248 if (thread == NULL) { | |
249 _global_recorder = rc; | |
250 } else { | |
251 thread->set_recorder(rc); | |
252 } | |
253 } | |
254 return rc; | |
255 } | |
256 | |
257 /* | |
258 * get a per-thread recorder from pool, or create a new one if | |
259 * there is not one available. | |
260 */ | |
261 MemRecorder* MemTracker::get_new_or_pooled_instance() { | |
262 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); | |
263 if (cur_head == NULL) { | |
264 MemRecorder* rec = new (std::nothrow)MemRecorder(); | |
265 if (rec == NULL || rec->out_of_memory()) { | |
266 shutdown(NMT_out_of_memory); | |
267 if (rec != NULL) { | |
268 delete rec; | |
269 rec = NULL; | |
270 } | |
271 } | |
272 return rec; | |
273 } else { | |
274 MemRecorder* next_head = cur_head->next(); | |
275 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, | |
276 (void*)cur_head)) { | |
277 return get_new_or_pooled_instance(); | |
278 } | |
279 cur_head->set_next(NULL); | |
280 Atomic::dec(&_pooled_recorder_count); | |
281 debug_only(cur_head->set_generation();) | |
282 return cur_head; | |
283 } | |
284 } | |
285 | |
286 /* | |
287 * retrieve all recorders in pending queue, and empty the queue | |
288 */ | |
289 MemRecorder* MemTracker::get_pending_recorders() { | |
290 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
291 MemRecorder* null_ptr = NULL; | |
292 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, | |
293 (void*)cur_head)) { | |
294 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
295 } | |
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296 NOT_PRODUCT(Atomic::store(0, &_pending_recorder_count)); |
6197 | 297 return cur_head; |
298 } | |
299 | |
300 /* | |
301 * release a recorder to recorder pool. | |
302 */ | |
303 void MemTracker::release_thread_recorder(MemRecorder* rec) { | |
304 assert(rec != NULL, "null recorder"); | |
305 // we don't want to pool too many recorders | |
306 rec->set_next(NULL); | |
307 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { | |
308 delete rec; | |
309 return; | |
310 } | |
311 | |
312 rec->clear(); | |
313 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
314 rec->set_next(cur_head); | |
315 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, | |
316 (void*)cur_head)) { | |
317 cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
318 rec->set_next(cur_head); | |
319 } | |
320 Atomic::inc(&_pooled_recorder_count); | |
321 } | |
322 | |
323 /* | |
324 * This is the most important method in whole nmt implementation. | |
325 * | |
326 * Create a memory record. | |
327 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM | |
328 * still in single thread mode. | |
329 * 2. For all threads other than JavaThread, ThreadCritical is needed | |
330 * to write to recorders to global recorder. | |
331 * 3. For JavaThreads that are not longer visible by safepoint, also | |
332 * need to take ThreadCritical and records are written to global | |
333 * recorders, since these threads are NOT walked by Threads.do_thread(). | |
334 * 4. JavaThreads that are running in native state, have to transition | |
335 * to VM state before writing to per-thread recorders. | |
336 * 5. JavaThreads that are running in VM state do not need any lock and | |
337 * records are written to per-thread recorders. | |
338 * 6. For a thread has yet to attach VM 'Thread', they need to take | |
339 * ThreadCritical to write to global recorder. | |
340 * | |
341 * Important note: | |
342 * NO LOCK should be taken inside ThreadCritical lock !!! | |
343 */ | |
344 void MemTracker::create_memory_record(address addr, MEMFLAGS flags, | |
345 size_t size, address pc, Thread* thread) { | |
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346 assert(addr != NULL, "Sanity check"); |
6197 | 347 if (!shutdown_in_progress()) { |
348 // single thread, we just write records direct to global recorder,' | |
349 // with any lock | |
350 if (_state == NMT_bootstrapping_single_thread) { | |
351 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
352 thread = NULL; | |
353 } else { | |
354 if (thread == NULL) { | |
355 // don't use Thread::current(), since it is possible that | |
356 // the calling thread has yet to attach to VM 'Thread', | |
357 // which will result assertion failure | |
358 thread = ThreadLocalStorage::thread(); | |
359 } | |
360 } | |
361 | |
362 if (thread != NULL) { | |
363 if (thread->is_Java_thread() && ((JavaThread*)thread)->is_safepoint_visible()) { | |
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364 JavaThread* java_thread = (JavaThread*)thread; |
6231 | 365 JavaThreadState state = java_thread->thread_state(); |
366 if (SafepointSynchronize::safepoint_safe(java_thread, state)) { | |
367 // JavaThreads that are safepoint safe, can run through safepoint, | |
368 // so ThreadCritical is needed to ensure no threads at safepoint create | |
369 // new records while the records are being gathered and the sequence number is changing | |
370 ThreadCritical tc; | |
371 create_record_in_recorder(addr, flags, size, pc, java_thread); | |
6197 | 372 } else { |
6231 | 373 create_record_in_recorder(addr, flags, size, pc, java_thread); |
6197 | 374 } |
375 } else { | |
376 // other threads, such as worker and watcher threads, etc. need to | |
377 // take ThreadCritical to write to global recorder | |
378 ThreadCritical tc; | |
379 create_record_in_recorder(addr, flags, size, pc, NULL); | |
380 } | |
381 } else { | |
382 if (_state == NMT_bootstrapping_single_thread) { | |
383 // single thread, no lock needed | |
384 create_record_in_recorder(addr, flags, size, pc, NULL); | |
385 } else { | |
386 // for thread has yet to attach VM 'Thread', we can not use VM mutex. | |
387 // use native thread critical instead | |
388 ThreadCritical tc; | |
389 create_record_in_recorder(addr, flags, size, pc, NULL); | |
390 } | |
391 } | |
392 } | |
393 } | |
394 | |
395 // write a record to proper recorder. No lock can be taken from this method | |
396 // down. | |
397 void MemTracker::create_record_in_recorder(address addr, MEMFLAGS flags, | |
6231 | 398 size_t size, address pc, JavaThread* thread) { |
6197 | 399 |
6231 | 400 MemRecorder* rc = get_thread_recorder(thread); |
6197 | 401 if (rc != NULL) { |
402 rc->record(addr, flags, size, pc); | |
403 } | |
404 } | |
405 | |
406 /** | |
407 * enqueue a recorder to pending queue | |
408 */ | |
409 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { | |
410 assert(rec != NULL, "null recorder"); | |
411 | |
412 // we are shutting down, so just delete it | |
413 if (shutdown_in_progress()) { | |
414 rec->set_next(NULL); | |
415 delete rec; | |
416 return; | |
417 } | |
418 | |
419 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
420 rec->set_next(cur_head); | |
421 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, | |
422 (void*)cur_head)) { | |
423 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
424 rec->set_next(cur_head); | |
425 } | |
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426 NOT_PRODUCT(Atomic::inc(&_pending_recorder_count);) |
6197 | 427 } |
428 | |
429 /* | |
430 * The method is called at global safepoint | |
431 * during it synchronization process. | |
432 * 1. enqueue all JavaThreads' per-thread recorders | |
433 * 2. enqueue global recorder | |
434 * 3. retrieve all pending recorders | |
435 * 4. reset global sequence number generator | |
436 * 5. call worker's sync | |
437 */ | |
438 #define MAX_SAFEPOINTS_TO_SKIP 128 | |
439 #define SAFE_SEQUENCE_THRESHOLD 30 | |
440 #define HIGH_GENERATION_THRESHOLD 60 | |
441 | |
442 void MemTracker::sync() { | |
443 assert(_tracking_level > NMT_off, "NMT is not enabled"); | |
444 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
445 | |
446 // Some GC tests hit large number of safepoints in short period of time | |
447 // without meaningful activities. We should prevent going to | |
448 // sync point in these cases, which can potentially exhaust generation buffer. | |
449 // Here is the factots to determine if we should go into sync point: | |
450 // 1. not to overflow sequence number | |
451 // 2. if we are in danger to overflow generation buffer | |
452 // 3. how many safepoints we already skipped sync point | |
453 if (_state == NMT_started) { | |
454 // worker thread is not ready, no one can manage generation | |
455 // buffer, so skip this safepoint | |
456 if (_worker_thread == NULL) return; | |
457 | |
458 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { | |
459 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; | |
460 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; | |
461 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { | |
462 _sync_point_skip_count ++; | |
463 return; | |
464 } | |
465 } | |
466 _sync_point_skip_count = 0; | |
467 { | |
468 // This method is running at safepoint, with ThreadCritical lock, | |
469 // it should guarantee that NMT is fully sync-ed. | |
470 ThreadCritical tc; | |
6231 | 471 |
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472 SequenceGenerator::reset(); |
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473 |
6231 | 474 // walk all JavaThreads to collect recorders |
475 SyncThreadRecorderClosure stc; | |
476 Threads::threads_do(&stc); | |
477 | |
478 _thread_count = stc.get_thread_count(); | |
479 MemRecorder* pending_recorders = get_pending_recorders(); | |
480 | |
6197 | 481 if (_global_recorder != NULL) { |
482 _global_recorder->set_next(pending_recorders); | |
483 pending_recorders = _global_recorder; | |
484 _global_recorder = NULL; | |
485 } | |
486 // check _worker_thread with lock to avoid racing condition | |
487 if (_worker_thread != NULL) { | |
488 _worker_thread->at_sync_point(pending_recorders); | |
489 } | |
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490 |
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491 assert(SequenceGenerator::peek() == 1, "Should not have memory activities during sync-point"); |
6197 | 492 } |
493 } | |
494 | |
495 // now, it is the time to shut whole things off | |
496 if (_state == NMT_final_shutdown) { | |
497 // walk all JavaThreads to delete all recorders | |
498 SyncThreadRecorderClosure stc; | |
499 Threads::threads_do(&stc); | |
500 // delete global recorder | |
501 { | |
502 ThreadCritical tc; | |
503 if (_global_recorder != NULL) { | |
504 delete _global_recorder; | |
505 _global_recorder = NULL; | |
506 } | |
507 } | |
6231 | 508 MemRecorder* pending_recorders = get_pending_recorders(); |
509 if (pending_recorders != NULL) { | |
510 delete pending_recorders; | |
511 } | |
512 // try at a later sync point to ensure MemRecorder instance drops to zero to | |
513 // completely shutdown NMT | |
514 if (MemRecorder::_instance_count == 0) { | |
515 _state = NMT_shutdown; | |
516 _tracking_level = NMT_off; | |
517 } | |
6197 | 518 } |
519 } | |
520 | |
521 /* | |
522 * Start worker thread. | |
523 */ | |
524 bool MemTracker::start_worker() { | |
525 assert(_worker_thread == NULL, "Just Check"); | |
526 _worker_thread = new (std::nothrow) MemTrackWorker(); | |
527 if (_worker_thread == NULL || _worker_thread->has_error()) { | |
528 shutdown(NMT_initialization); | |
529 return false; | |
530 } | |
531 _worker_thread->start(); | |
532 return true; | |
533 } | |
534 | |
535 /* | |
536 * We need to collect a JavaThread's per-thread recorder | |
537 * before it exits. | |
538 */ | |
539 void MemTracker::thread_exiting(JavaThread* thread) { | |
540 if (is_on()) { | |
541 MemRecorder* rec = thread->get_recorder(); | |
542 if (rec != NULL) { | |
543 enqueue_pending_recorder(rec); | |
544 thread->set_recorder(NULL); | |
545 } | |
546 } | |
547 } | |
548 | |
549 // baseline current memory snapshot | |
550 bool MemTracker::baseline() { | |
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551 MutexLockerEx lock(_query_lock, true); |
6197 | 552 MemSnapshot* snapshot = get_snapshot(); |
553 if (snapshot != NULL) { | |
554 return _baseline.baseline(*snapshot, false); | |
555 } | |
556 return false; | |
557 } | |
558 | |
559 // print memory usage from current snapshot | |
560 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
561 MemBaseline baseline; | |
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562 MutexLockerEx lock(_query_lock, true); |
6197 | 563 MemSnapshot* snapshot = get_snapshot(); |
564 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
565 BaselineReporter reporter(out, unit); | |
566 reporter.report_baseline(baseline, summary_only); | |
567 return true; | |
568 } | |
569 return false; | |
570 } | |
571 | |
572 // compare memory usage between current snapshot and baseline | |
573 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
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574 MutexLockerEx lock(_query_lock, true); |
6197 | 575 if (_baseline.baselined()) { |
576 MemBaseline baseline; | |
577 MemSnapshot* snapshot = get_snapshot(); | |
578 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
579 BaselineReporter reporter(out, unit); | |
580 reporter.diff_baselines(baseline, _baseline, summary_only); | |
581 return true; | |
582 } | |
583 } | |
584 return false; | |
585 } | |
586 | |
587 #ifndef PRODUCT | |
588 void MemTracker::walk_stack(int toSkip, char* buf, int len) { | |
589 int cur_len = 0; | |
590 char tmp[1024]; | |
591 address pc; | |
592 | |
593 while (cur_len < len) { | |
594 pc = os::get_caller_pc(toSkip + 1); | |
595 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { | |
596 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); | |
597 cur_len = (int)strlen(buf); | |
598 } else { | |
599 buf[cur_len] = '\0'; | |
600 break; | |
601 } | |
602 toSkip ++; | |
603 } | |
604 } | |
605 | |
606 void MemTracker::print_tracker_stats(outputStream* st) { | |
607 st->print_cr("\nMemory Tracker Stats:"); | |
608 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); | |
609 st->print_cr("\tthead count = %d", _thread_count); | |
610 st->print_cr("\tArena instance = %d", Arena::_instance_count); | |
611 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); | |
612 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); | |
613 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); | |
614 if (_worker_thread != NULL) { | |
615 st->print_cr("\tWorker thread:"); | |
616 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); | |
617 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); | |
618 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); | |
619 } else { | |
620 st->print_cr("\tWorker thread is not started"); | |
621 } | |
622 st->print_cr(" "); | |
623 | |
624 if (_snapshot != NULL) { | |
625 _snapshot->print_snapshot_stats(st); | |
626 } else { | |
627 st->print_cr("No snapshot"); | |
628 } | |
629 } | |
630 #endif | |
631 |