Mercurial > hg > graal-compiler
annotate src/share/vm/services/memTracker.cpp @ 6607:e5bf1c79ed5b
7191124: Optimized build is broken due to inconsistent use of DEBUG_ONLY and NOT_PRODUCT macros in NMT
Summary: Updated all related variables and methods to use NOT_PRODUCT macros
Reviewed-by: coleenp, acorn, kvn
| author | zgu |
|---|---|
| date | Tue, 14 Aug 2012 13:56:46 -0400 |
| parents | 58a04a45a549 |
| children | 716e6ef4482a |
| 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 | |
| 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; | |
| 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 } | |
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294 NOT_PRODUCT(Atomic::store(0, &_pending_recorder_count)); |
| 6197 | 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 } | |
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423 NOT_PRODUCT(Atomic::inc(&_pending_recorder_count);) |
| 6197 | 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 |