Mercurial > hg > truffle
annotate src/share/vm/services/memTracker.cpp @ 7811:94ea9a864fc6
Remove usages of VmIds.toString.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Mon, 18 Feb 2013 19:08:52 -0800 |
parents | ecd24264898b |
children | 4102b59539ce |
rev | line source |
---|---|
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 | |
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7172
diff
changeset
|
26 #include "oops/instanceKlass.hpp" |
6197 | 27 #include "runtime/atomic.hpp" |
28 #include "runtime/interfaceSupport.hpp" | |
29 #include "runtime/mutexLocker.hpp" | |
30 #include "runtime/safepoint.hpp" | |
31 #include "runtime/threadCritical.hpp" | |
32 #include "services/memPtr.hpp" | |
33 #include "services/memReporter.hpp" | |
34 #include "services/memTracker.hpp" | |
35 #include "utilities/decoder.hpp" | |
36 #include "utilities/globalDefinitions.hpp" | |
37 | |
38 bool NMT_track_callsite = false; | |
39 | |
40 // walk all 'known' threads at NMT sync point, and collect their recorders | |
41 void SyncThreadRecorderClosure::do_thread(Thread* thread) { | |
42 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
43 if (thread->is_Java_thread()) { | |
44 JavaThread* javaThread = (JavaThread*)thread; | |
45 MemRecorder* recorder = javaThread->get_recorder(); | |
46 if (recorder != NULL) { | |
47 MemTracker::enqueue_pending_recorder(recorder); | |
48 javaThread->set_recorder(NULL); | |
49 } | |
50 } | |
51 _thread_count ++; | |
52 } | |
53 | |
54 | |
55 MemRecorder* MemTracker::_global_recorder = NULL; | |
56 MemSnapshot* MemTracker::_snapshot = NULL; | |
57 MemBaseline MemTracker::_baseline; | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
58 Mutex* MemTracker::_query_lock = NULL; |
6197 | 59 volatile MemRecorder* MemTracker::_merge_pending_queue = NULL; |
60 volatile MemRecorder* MemTracker::_pooled_recorders = NULL; | |
61 MemTrackWorker* MemTracker::_worker_thread = NULL; | |
62 int MemTracker::_sync_point_skip_count = 0; | |
63 MemTracker::NMTLevel MemTracker::_tracking_level = MemTracker::NMT_off; | |
64 volatile MemTracker::NMTStates MemTracker::_state = NMT_uninited; | |
65 MemTracker::ShutdownReason MemTracker::_reason = NMT_shutdown_none; | |
66 int MemTracker::_thread_count = 255; | |
67 volatile jint MemTracker::_pooled_recorder_count = 0; | |
68 debug_only(intx MemTracker::_main_thread_tid = 0;) | |
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
69 NOT_PRODUCT(volatile jint MemTracker::_pending_recorder_count = 0;) |
6197 | 70 |
71 void MemTracker::init_tracking_options(const char* option_line) { | |
72 _tracking_level = NMT_off; | |
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
73 if (strcmp(option_line, "=summary") == 0) { |
6197 | 74 _tracking_level = NMT_summary; |
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
75 } else if (strcmp(option_line, "=detail") == 0) { |
6197 | 76 _tracking_level = NMT_detail; |
7172
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
77 } else if (strcmp(option_line, "=off") != 0) { |
bbc14465e7db
8003689: MemTracker::init_tracking_options() reads outside array if commandline argument is empty
zgu
parents:
6882
diff
changeset
|
78 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL); |
6197 | 79 } |
80 } | |
81 | |
82 // first phase of bootstrapping, when VM is still in single-threaded mode. | |
83 void MemTracker::bootstrap_single_thread() { | |
84 if (_tracking_level > NMT_off) { | |
85 assert(_state == NMT_uninited, "wrong state"); | |
86 | |
87 // NMT is not supported with UseMallocOnly is on. NMT can NOT | |
88 // handle the amount of malloc data without significantly impacting | |
89 // runtime performance when this flag is on. | |
90 if (UseMallocOnly) { | |
91 shutdown(NMT_use_malloc_only); | |
92 return; | |
93 } | |
94 | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
95 _query_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf, "NMT_queryLock"); |
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
96 if (_query_lock == NULL) { |
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
97 shutdown(NMT_out_of_memory); |
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
98 return; |
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
99 } |
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
100 |
6197 | 101 debug_only(_main_thread_tid = os::current_thread_id();) |
102 _state = NMT_bootstrapping_single_thread; | |
103 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
104 } | |
105 } | |
106 | |
107 // second phase of bootstrapping, when VM is about to or already entered multi-theaded mode. | |
108 void MemTracker::bootstrap_multi_thread() { | |
109 if (_tracking_level > NMT_off && _state == NMT_bootstrapping_single_thread) { | |
110 // create nmt lock for multi-thread execution | |
111 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
112 _state = NMT_bootstrapping_multi_thread; | |
113 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
114 } | |
115 } | |
116 | |
117 // fully start nmt | |
118 void MemTracker::start() { | |
119 // Native memory tracking is off from command line option | |
120 if (_tracking_level == NMT_off || shutdown_in_progress()) return; | |
121 | |
122 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
123 assert(_state == NMT_bootstrapping_multi_thread, "wrong state"); | |
124 | |
125 _snapshot = new (std::nothrow)MemSnapshot(); | |
126 if (_snapshot != NULL && !_snapshot->out_of_memory()) { | |
127 if (start_worker()) { | |
128 _state = NMT_started; | |
129 NMT_track_callsite = (_tracking_level == NMT_detail && can_walk_stack()); | |
130 return; | |
131 } | |
132 } | |
133 | |
134 // fail to start native memory tracking, shut it down | |
135 shutdown(NMT_initialization); | |
136 } | |
137 | |
138 /** | |
139 * Shutting down native memory tracking. | |
140 * We can not shutdown native memory tracking immediately, so we just | |
141 * setup shutdown pending flag, every native memory tracking component | |
142 * should orderly shut itself down. | |
143 * | |
144 * The shutdown sequences: | |
145 * 1. MemTracker::shutdown() sets MemTracker to shutdown pending state | |
146 * 2. Worker thread calls MemTracker::final_shutdown(), which transites | |
147 * MemTracker to final shutdown state. | |
148 * 3. At sync point, MemTracker does final cleanup, before sets memory | |
149 * tracking level to off to complete shutdown. | |
150 */ | |
151 void MemTracker::shutdown(ShutdownReason reason) { | |
152 if (_tracking_level == NMT_off) return; | |
153 | |
154 if (_state <= NMT_bootstrapping_single_thread) { | |
155 // we still in single thread mode, there is not contention | |
156 _state = NMT_shutdown_pending; | |
157 _reason = reason; | |
158 } else { | |
159 // we want to know who initialized shutdown | |
160 if ((jint)NMT_started == Atomic::cmpxchg((jint)NMT_shutdown_pending, | |
161 (jint*)&_state, (jint)NMT_started)) { | |
162 _reason = reason; | |
163 } | |
164 } | |
165 } | |
166 | |
167 // final phase of shutdown | |
168 void MemTracker::final_shutdown() { | |
169 // delete all pending recorders and pooled recorders | |
170 delete_all_pending_recorders(); | |
171 delete_all_pooled_recorders(); | |
172 | |
173 { | |
174 // shared baseline and snapshot are the only objects needed to | |
175 // create query results | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
176 MutexLockerEx locker(_query_lock, true); |
6197 | 177 // cleanup baseline data and snapshot |
178 _baseline.clear(); | |
179 delete _snapshot; | |
180 _snapshot = NULL; | |
181 } | |
182 | |
183 // shutdown shared decoder instance, since it is only | |
184 // used by native memory tracking so far. | |
185 Decoder::shutdown(); | |
186 | |
187 MemTrackWorker* worker = NULL; | |
188 { | |
189 ThreadCritical tc; | |
190 // can not delete worker inside the thread critical | |
191 if (_worker_thread != NULL && Thread::current() == _worker_thread) { | |
192 worker = _worker_thread; | |
193 _worker_thread = NULL; | |
194 } | |
195 } | |
196 if (worker != NULL) { | |
197 delete worker; | |
198 } | |
199 _state = NMT_final_shutdown; | |
200 } | |
201 | |
202 // delete all pooled recorders | |
203 void MemTracker::delete_all_pooled_recorders() { | |
204 // free all pooled recorders | |
205 volatile MemRecorder* cur_head = _pooled_recorders; | |
206 if (cur_head != NULL) { | |
207 MemRecorder* null_ptr = NULL; | |
208 while (cur_head != NULL && (void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, | |
209 (void*)&_pooled_recorders, (void*)cur_head)) { | |
210 cur_head = _pooled_recorders; | |
211 } | |
212 if (cur_head != NULL) { | |
213 delete cur_head; | |
214 _pooled_recorder_count = 0; | |
215 } | |
216 } | |
217 } | |
218 | |
219 // delete all recorders in pending queue | |
220 void MemTracker::delete_all_pending_recorders() { | |
221 // free all pending recorders | |
222 MemRecorder* pending_head = get_pending_recorders(); | |
223 if (pending_head != NULL) { | |
224 delete pending_head; | |
225 } | |
226 } | |
227 | |
228 /* | |
229 * retrieve per-thread recorder of specified thread. | |
230 * if thread == NULL, it means global recorder | |
231 */ | |
232 MemRecorder* MemTracker::get_thread_recorder(JavaThread* thread) { | |
233 if (shutdown_in_progress()) return NULL; | |
234 | |
235 MemRecorder* rc; | |
236 if (thread == NULL) { | |
237 rc = _global_recorder; | |
238 } else { | |
239 rc = thread->get_recorder(); | |
240 } | |
241 | |
242 if (rc != NULL && rc->is_full()) { | |
243 enqueue_pending_recorder(rc); | |
244 rc = NULL; | |
245 } | |
246 | |
247 if (rc == NULL) { | |
248 rc = get_new_or_pooled_instance(); | |
249 if (thread == NULL) { | |
250 _global_recorder = rc; | |
251 } else { | |
252 thread->set_recorder(rc); | |
253 } | |
254 } | |
255 return rc; | |
256 } | |
257 | |
258 /* | |
259 * get a per-thread recorder from pool, or create a new one if | |
260 * there is not one available. | |
261 */ | |
262 MemRecorder* MemTracker::get_new_or_pooled_instance() { | |
263 MemRecorder* cur_head = const_cast<MemRecorder*> (_pooled_recorders); | |
264 if (cur_head == NULL) { | |
265 MemRecorder* rec = new (std::nothrow)MemRecorder(); | |
266 if (rec == NULL || rec->out_of_memory()) { | |
267 shutdown(NMT_out_of_memory); | |
268 if (rec != NULL) { | |
269 delete rec; | |
270 rec = NULL; | |
271 } | |
272 } | |
273 return rec; | |
274 } else { | |
275 MemRecorder* next_head = cur_head->next(); | |
276 if ((void*)cur_head != Atomic::cmpxchg_ptr((void*)next_head, (void*)&_pooled_recorders, | |
277 (void*)cur_head)) { | |
278 return get_new_or_pooled_instance(); | |
279 } | |
280 cur_head->set_next(NULL); | |
281 Atomic::dec(&_pooled_recorder_count); | |
282 debug_only(cur_head->set_generation();) | |
283 return cur_head; | |
284 } | |
285 } | |
286 | |
287 /* | |
288 * retrieve all recorders in pending queue, and empty the queue | |
289 */ | |
290 MemRecorder* MemTracker::get_pending_recorders() { | |
291 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
292 MemRecorder* null_ptr = NULL; | |
293 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)null_ptr, (void*)&_merge_pending_queue, | |
294 (void*)cur_head)) { | |
295 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
296 } | |
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
297 NOT_PRODUCT(Atomic::store(0, &_pending_recorder_count)); |
6197 | 298 return cur_head; |
299 } | |
300 | |
301 /* | |
302 * release a recorder to recorder pool. | |
303 */ | |
304 void MemTracker::release_thread_recorder(MemRecorder* rec) { | |
305 assert(rec != NULL, "null recorder"); | |
306 // we don't want to pool too many recorders | |
307 rec->set_next(NULL); | |
308 if (shutdown_in_progress() || _pooled_recorder_count > _thread_count * 2) { | |
309 delete rec; | |
310 return; | |
311 } | |
312 | |
313 rec->clear(); | |
314 MemRecorder* cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
315 rec->set_next(cur_head); | |
316 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_pooled_recorders, | |
317 (void*)cur_head)) { | |
318 cur_head = const_cast<MemRecorder*>(_pooled_recorders); | |
319 rec->set_next(cur_head); | |
320 } | |
321 Atomic::inc(&_pooled_recorder_count); | |
322 } | |
323 | |
324 /* | |
325 * This is the most important method in whole nmt implementation. | |
326 * | |
327 * Create a memory record. | |
328 * 1. When nmt is in single-threaded bootstrapping mode, no lock is needed as VM | |
329 * still in single thread mode. | |
330 * 2. For all threads other than JavaThread, ThreadCritical is needed | |
331 * to write to recorders to global recorder. | |
332 * 3. For JavaThreads that are not longer visible by safepoint, also | |
333 * need to take ThreadCritical and records are written to global | |
334 * recorders, since these threads are NOT walked by Threads.do_thread(). | |
335 * 4. JavaThreads that are running in native state, have to transition | |
336 * to VM state before writing to per-thread recorders. | |
337 * 5. JavaThreads that are running in VM state do not need any lock and | |
338 * records are written to per-thread recorders. | |
339 * 6. For a thread has yet to attach VM 'Thread', they need to take | |
340 * ThreadCritical to write to global recorder. | |
341 * | |
342 * Important note: | |
343 * NO LOCK should be taken inside ThreadCritical lock !!! | |
344 */ | |
345 void MemTracker::create_memory_record(address addr, MEMFLAGS flags, | |
346 size_t size, address pc, Thread* thread) { | |
6768
716e6ef4482a
7190089: NMT ON: NMT failed assertion on thread's stack base address
zgu
parents:
6607
diff
changeset
|
347 assert(addr != NULL, "Sanity check"); |
6197 | 348 if (!shutdown_in_progress()) { |
349 // single thread, we just write records direct to global recorder,' | |
350 // with any lock | |
351 if (_state == NMT_bootstrapping_single_thread) { | |
352 assert(_main_thread_tid == os::current_thread_id(), "wrong thread"); | |
353 thread = NULL; | |
354 } else { | |
355 if (thread == NULL) { | |
356 // don't use Thread::current(), since it is possible that | |
357 // the calling thread has yet to attach to VM 'Thread', | |
358 // which will result assertion failure | |
359 thread = ThreadLocalStorage::thread(); | |
360 } | |
361 } | |
362 | |
363 if (thread != NULL) { | |
364 if (thread->is_Java_thread() && ((JavaThread*)thread)->is_safepoint_visible()) { | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
365 JavaThread* java_thread = (JavaThread*)thread; |
6231 | 366 JavaThreadState state = java_thread->thread_state(); |
367 if (SafepointSynchronize::safepoint_safe(java_thread, state)) { | |
368 // JavaThreads that are safepoint safe, can run through safepoint, | |
369 // so ThreadCritical is needed to ensure no threads at safepoint create | |
370 // new records while the records are being gathered and the sequence number is changing | |
371 ThreadCritical tc; | |
372 create_record_in_recorder(addr, flags, size, pc, java_thread); | |
6197 | 373 } else { |
6231 | 374 create_record_in_recorder(addr, flags, size, pc, java_thread); |
6197 | 375 } |
376 } else { | |
377 // other threads, such as worker and watcher threads, etc. need to | |
378 // take ThreadCritical to write to global recorder | |
379 ThreadCritical tc; | |
380 create_record_in_recorder(addr, flags, size, pc, NULL); | |
381 } | |
382 } else { | |
383 if (_state == NMT_bootstrapping_single_thread) { | |
384 // single thread, no lock needed | |
385 create_record_in_recorder(addr, flags, size, pc, NULL); | |
386 } else { | |
387 // for thread has yet to attach VM 'Thread', we can not use VM mutex. | |
388 // use native thread critical instead | |
389 ThreadCritical tc; | |
390 create_record_in_recorder(addr, flags, size, pc, NULL); | |
391 } | |
392 } | |
393 } | |
394 } | |
395 | |
396 // write a record to proper recorder. No lock can be taken from this method | |
397 // down. | |
398 void MemTracker::create_record_in_recorder(address addr, MEMFLAGS flags, | |
6231 | 399 size_t size, address pc, JavaThread* thread) { |
6197 | 400 |
6231 | 401 MemRecorder* rc = get_thread_recorder(thread); |
6197 | 402 if (rc != NULL) { |
403 rc->record(addr, flags, size, pc); | |
404 } | |
405 } | |
406 | |
407 /** | |
408 * enqueue a recorder to pending queue | |
409 */ | |
410 void MemTracker::enqueue_pending_recorder(MemRecorder* rec) { | |
411 assert(rec != NULL, "null recorder"); | |
412 | |
413 // we are shutting down, so just delete it | |
414 if (shutdown_in_progress()) { | |
415 rec->set_next(NULL); | |
416 delete rec; | |
417 return; | |
418 } | |
419 | |
420 MemRecorder* cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
421 rec->set_next(cur_head); | |
422 while ((void*)cur_head != Atomic::cmpxchg_ptr((void*)rec, (void*)&_merge_pending_queue, | |
423 (void*)cur_head)) { | |
424 cur_head = const_cast<MemRecorder*>(_merge_pending_queue); | |
425 rec->set_next(cur_head); | |
426 } | |
6607
e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
zgu
parents:
6235
diff
changeset
|
427 NOT_PRODUCT(Atomic::inc(&_pending_recorder_count);) |
6197 | 428 } |
429 | |
430 /* | |
431 * The method is called at global safepoint | |
432 * during it synchronization process. | |
433 * 1. enqueue all JavaThreads' per-thread recorders | |
434 * 2. enqueue global recorder | |
435 * 3. retrieve all pending recorders | |
436 * 4. reset global sequence number generator | |
437 * 5. call worker's sync | |
438 */ | |
439 #define MAX_SAFEPOINTS_TO_SKIP 128 | |
440 #define SAFE_SEQUENCE_THRESHOLD 30 | |
441 #define HIGH_GENERATION_THRESHOLD 60 | |
442 | |
443 void MemTracker::sync() { | |
444 assert(_tracking_level > NMT_off, "NMT is not enabled"); | |
445 assert(SafepointSynchronize::is_at_safepoint(), "Safepoint required"); | |
446 | |
447 // Some GC tests hit large number of safepoints in short period of time | |
448 // without meaningful activities. We should prevent going to | |
449 // sync point in these cases, which can potentially exhaust generation buffer. | |
450 // Here is the factots to determine if we should go into sync point: | |
451 // 1. not to overflow sequence number | |
452 // 2. if we are in danger to overflow generation buffer | |
453 // 3. how many safepoints we already skipped sync point | |
454 if (_state == NMT_started) { | |
455 // worker thread is not ready, no one can manage generation | |
456 // buffer, so skip this safepoint | |
457 if (_worker_thread == NULL) return; | |
458 | |
459 if (_sync_point_skip_count < MAX_SAFEPOINTS_TO_SKIP) { | |
460 int per_seq_in_use = SequenceGenerator::peek() * 100 / max_jint; | |
461 int per_gen_in_use = _worker_thread->generations_in_use() * 100 / MAX_GENERATIONS; | |
462 if (per_seq_in_use < SAFE_SEQUENCE_THRESHOLD && per_gen_in_use >= HIGH_GENERATION_THRESHOLD) { | |
463 _sync_point_skip_count ++; | |
464 return; | |
465 } | |
466 } | |
467 _sync_point_skip_count = 0; | |
468 { | |
469 // This method is running at safepoint, with ThreadCritical lock, | |
470 // it should guarantee that NMT is fully sync-ed. | |
471 ThreadCritical tc; | |
6231 | 472 |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
473 SequenceGenerator::reset(); |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
474 |
6231 | 475 // walk all JavaThreads to collect recorders |
476 SyncThreadRecorderClosure stc; | |
477 Threads::threads_do(&stc); | |
478 | |
479 _thread_count = stc.get_thread_count(); | |
480 MemRecorder* pending_recorders = get_pending_recorders(); | |
481 | |
6197 | 482 if (_global_recorder != NULL) { |
483 _global_recorder->set_next(pending_recorders); | |
484 pending_recorders = _global_recorder; | |
485 _global_recorder = NULL; | |
486 } | |
487 // check _worker_thread with lock to avoid racing condition | |
488 if (_worker_thread != NULL) { | |
7464
ecd24264898b
8005048: NMT: #loaded classes needs to just show the # defined classes
zgu
parents:
7172
diff
changeset
|
489 _worker_thread->at_sync_point(pending_recorders, InstanceKlass::number_of_instance_classes()); |
6197 | 490 } |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
491 |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6781
diff
changeset
|
492 assert(SequenceGenerator::peek() == 1, "Should not have memory activities during sync-point"); |
6197 | 493 } |
494 } | |
495 | |
496 // now, it is the time to shut whole things off | |
497 if (_state == NMT_final_shutdown) { | |
498 // walk all JavaThreads to delete all recorders | |
499 SyncThreadRecorderClosure stc; | |
500 Threads::threads_do(&stc); | |
501 // delete global recorder | |
502 { | |
503 ThreadCritical tc; | |
504 if (_global_recorder != NULL) { | |
505 delete _global_recorder; | |
506 _global_recorder = NULL; | |
507 } | |
508 } | |
6231 | 509 MemRecorder* pending_recorders = get_pending_recorders(); |
510 if (pending_recorders != NULL) { | |
511 delete pending_recorders; | |
512 } | |
513 // try at a later sync point to ensure MemRecorder instance drops to zero to | |
514 // completely shutdown NMT | |
515 if (MemRecorder::_instance_count == 0) { | |
516 _state = NMT_shutdown; | |
517 _tracking_level = NMT_off; | |
518 } | |
6197 | 519 } |
520 } | |
521 | |
522 /* | |
523 * Start worker thread. | |
524 */ | |
525 bool MemTracker::start_worker() { | |
526 assert(_worker_thread == NULL, "Just Check"); | |
527 _worker_thread = new (std::nothrow) MemTrackWorker(); | |
528 if (_worker_thread == NULL || _worker_thread->has_error()) { | |
529 shutdown(NMT_initialization); | |
530 return false; | |
531 } | |
532 _worker_thread->start(); | |
533 return true; | |
534 } | |
535 | |
536 /* | |
537 * We need to collect a JavaThread's per-thread recorder | |
538 * before it exits. | |
539 */ | |
540 void MemTracker::thread_exiting(JavaThread* thread) { | |
541 if (is_on()) { | |
542 MemRecorder* rec = thread->get_recorder(); | |
543 if (rec != NULL) { | |
544 enqueue_pending_recorder(rec); | |
545 thread->set_recorder(NULL); | |
546 } | |
547 } | |
548 } | |
549 | |
550 // baseline current memory snapshot | |
551 bool MemTracker::baseline() { | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
552 MutexLockerEx lock(_query_lock, true); |
6197 | 553 MemSnapshot* snapshot = get_snapshot(); |
554 if (snapshot != NULL) { | |
555 return _baseline.baseline(*snapshot, false); | |
556 } | |
557 return false; | |
558 } | |
559 | |
560 // print memory usage from current snapshot | |
561 bool MemTracker::print_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
562 MemBaseline baseline; | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
563 MutexLockerEx lock(_query_lock, true); |
6197 | 564 MemSnapshot* snapshot = get_snapshot(); |
565 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
566 BaselineReporter reporter(out, unit); | |
567 reporter.report_baseline(baseline, summary_only); | |
568 return true; | |
569 } | |
570 return false; | |
571 } | |
572 | |
573 // compare memory usage between current snapshot and baseline | |
574 bool MemTracker::compare_memory_usage(BaselineOutputer& out, size_t unit, bool summary_only) { | |
6232
f1f45dddb0bd
7181986: NMT ON: Assertion failure when running jdi ExpiredRequestDeletionTest
zgu
parents:
6197
diff
changeset
|
575 MutexLockerEx lock(_query_lock, true); |
6197 | 576 if (_baseline.baselined()) { |
577 MemBaseline baseline; | |
578 MemSnapshot* snapshot = get_snapshot(); | |
579 if (snapshot != NULL && baseline.baseline(*snapshot, summary_only)) { | |
580 BaselineReporter reporter(out, unit); | |
581 reporter.diff_baselines(baseline, _baseline, summary_only); | |
582 return true; | |
583 } | |
584 } | |
585 return false; | |
586 } | |
587 | |
588 #ifndef PRODUCT | |
589 void MemTracker::walk_stack(int toSkip, char* buf, int len) { | |
590 int cur_len = 0; | |
591 char tmp[1024]; | |
592 address pc; | |
593 | |
594 while (cur_len < len) { | |
595 pc = os::get_caller_pc(toSkip + 1); | |
596 if (pc != NULL && os::dll_address_to_function_name(pc, tmp, sizeof(tmp), NULL)) { | |
597 jio_snprintf(&buf[cur_len], (len - cur_len), "%s\n", tmp); | |
598 cur_len = (int)strlen(buf); | |
599 } else { | |
600 buf[cur_len] = '\0'; | |
601 break; | |
602 } | |
603 toSkip ++; | |
604 } | |
605 } | |
606 | |
607 void MemTracker::print_tracker_stats(outputStream* st) { | |
608 st->print_cr("\nMemory Tracker Stats:"); | |
609 st->print_cr("\tMax sequence number = %d", SequenceGenerator::max_seq_num()); | |
610 st->print_cr("\tthead count = %d", _thread_count); | |
611 st->print_cr("\tArena instance = %d", Arena::_instance_count); | |
612 st->print_cr("\tpooled recorder count = %d", _pooled_recorder_count); | |
613 st->print_cr("\tqueued recorder count = %d", _pending_recorder_count); | |
614 st->print_cr("\tmemory recorder instance count = %d", MemRecorder::_instance_count); | |
615 if (_worker_thread != NULL) { | |
616 st->print_cr("\tWorker thread:"); | |
617 st->print_cr("\t\tSync point count = %d", _worker_thread->_sync_point_count); | |
618 st->print_cr("\t\tpending recorder count = %d", _worker_thread->count_pending_recorders()); | |
619 st->print_cr("\t\tmerge count = %d", _worker_thread->_merge_count); | |
620 } else { | |
621 st->print_cr("\tWorker thread is not started"); | |
622 } | |
623 st->print_cr(" "); | |
624 | |
625 if (_snapshot != NULL) { | |
626 _snapshot->print_snapshot_stats(st); | |
627 } else { | |
628 st->print_cr("No snapshot"); | |
629 } | |
630 } | |
631 #endif | |
632 |