Mercurial > hg > graal-compiler
annotate src/share/vm/services/memTracker.hpp @ 6770:9a86ddfc6c8f
7188594: Print statistic collected by NMT with VM flag
Summary: Print out statistics of collected NMT data if it is on at VM exits
Reviewed-by: kvn, coleenp, twisti
| author | zgu |
|---|---|
| date | Mon, 17 Sep 2012 16:37:26 -0400 |
| parents | 716e6ef4482a |
| children | fb19af007ffc |
| 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 | |
| 25 #ifndef SHARE_VM_SERVICES_MEM_TRACKER_HPP | |
| 26 #define SHARE_VM_SERVICES_MEM_TRACKER_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "runtime/globals.hpp" | |
| 30 #include "runtime/mutex.hpp" | |
| 31 #include "runtime/os.hpp" | |
| 32 #include "runtime/thread.hpp" | |
| 33 #include "services/memPtr.hpp" | |
| 34 #include "services/memRecorder.hpp" | |
| 35 #include "services/memSnapshot.hpp" | |
| 36 #include "services/memTrackWorker.hpp" | |
| 37 | |
| 38 #ifdef SOLARIS | |
| 39 #include "thread_solaris.inline.hpp" | |
| 40 #endif | |
| 41 | |
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42 #ifdef _DEBUG |
| 6197 | 43 #define DEBUG_CALLER_PC os::get_caller_pc(3) |
| 44 #else | |
| 45 #define DEBUG_CALLER_PC 0 | |
| 46 #endif | |
| 47 | |
| 48 // The thread closure walks threads to collect per-thread | |
| 49 // memory recorders at NMT sync point | |
| 50 class SyncThreadRecorderClosure : public ThreadClosure { | |
| 51 private: | |
| 52 int _thread_count; | |
| 53 | |
| 54 public: | |
| 55 SyncThreadRecorderClosure() { | |
| 56 _thread_count =0; | |
| 57 } | |
| 58 | |
| 59 void do_thread(Thread* thread); | |
| 60 int get_thread_count() const { | |
| 61 return _thread_count; | |
| 62 } | |
| 63 }; | |
| 64 | |
| 65 class BaselineOutputer; | |
| 66 class MemSnapshot; | |
| 67 class MemTrackWorker; | |
| 68 class Thread; | |
| 69 /* | |
| 70 * MemTracker is the 'gate' class to native memory tracking runtime. | |
| 71 */ | |
| 72 class MemTracker : AllStatic { | |
| 73 friend class MemTrackWorker; | |
| 74 friend class MemSnapshot; | |
| 75 friend class SyncThreadRecorderClosure; | |
| 76 | |
| 77 // NMT state | |
| 78 enum NMTStates { | |
| 79 NMT_uninited, // not yet initialized | |
| 80 NMT_bootstrapping_single_thread, // bootstrapping, VM is in single thread mode | |
| 81 NMT_bootstrapping_multi_thread, // bootstrapping, VM is about to enter multi-thread mode | |
| 82 NMT_started, // NMT fully started | |
| 83 NMT_shutdown_pending, // shutdown pending | |
| 84 NMT_final_shutdown, // in final phase of shutdown | |
| 85 NMT_shutdown // shutdown | |
| 86 }; | |
| 87 | |
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88 public: |
| 6197 | 89 // native memory tracking level |
| 90 enum NMTLevel { | |
| 91 NMT_off, // native memory tracking is off | |
| 92 NMT_summary, // don't track callsite | |
| 93 NMT_detail // track callsite also | |
| 94 }; | |
| 95 | |
| 96 enum ShutdownReason { | |
| 97 NMT_shutdown_none, // no shutdown requested | |
| 98 NMT_shutdown_user, // user requested shutdown | |
| 99 NMT_normal, // normal shutdown, process exit | |
| 100 NMT_out_of_memory, // shutdown due to out of memory | |
| 101 NMT_initialization, // shutdown due to initialization failure | |
| 102 NMT_use_malloc_only, // can not combine NMT with UseMallocOnly flag | |
| 103 NMT_error_reporting, // shutdown by vmError::report_and_die() | |
| 104 NMT_out_of_generation, // running out of generation queue | |
| 105 NMT_sequence_overflow // overflow the sequence number | |
| 106 }; | |
| 107 | |
| 108 public: | |
| 109 // initialize NMT tracking level from command line options, called | |
| 110 // from VM command line parsing code | |
| 111 static void init_tracking_options(const char* option_line); | |
| 112 | |
| 113 // if NMT is enabled to record memory activities | |
| 114 static inline bool is_on() { | |
| 115 return (_tracking_level >= NMT_summary && | |
| 116 _state >= NMT_bootstrapping_single_thread); | |
| 117 } | |
| 118 | |
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119 static inline enum NMTLevel tracking_level() { |
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120 return _tracking_level; |
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121 } |
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122 |
| 6197 | 123 // user readable reason for shutting down NMT |
| 124 static const char* reason() { | |
| 125 switch(_reason) { | |
| 126 case NMT_shutdown_none: | |
| 127 return "Native memory tracking is not enabled"; | |
| 128 case NMT_shutdown_user: | |
| 129 return "Native memory tracking has been shutdown by user"; | |
| 130 case NMT_normal: | |
| 131 return "Native memory tracking has been shutdown due to process exiting"; | |
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132 case NMT_out_of_memory: |
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133 return "Native memory tracking has been shutdown due to out of native memory"; |
| 6197 | 134 case NMT_initialization: |
| 135 return "Native memory tracking failed to initialize"; | |
| 136 case NMT_error_reporting: | |
| 137 return "Native memory tracking has been shutdown due to error reporting"; | |
| 138 case NMT_out_of_generation: | |
| 139 return "Native memory tracking has been shutdown due to running out of generation buffer"; | |
| 140 case NMT_sequence_overflow: | |
| 141 return "Native memory tracking has been shutdown due to overflow the sequence number"; | |
| 142 case NMT_use_malloc_only: | |
| 143 return "Native memory tracking is not supported when UseMallocOnly is on"; | |
| 144 default: | |
| 145 ShouldNotReachHere(); | |
| 146 return NULL; | |
| 147 } | |
| 148 } | |
| 149 | |
| 150 // test if we can walk native stack | |
| 151 static bool can_walk_stack() { | |
| 152 // native stack is not walkable during bootstrapping on sparc | |
| 153 #if defined(SPARC) | |
| 154 return (_state == NMT_started); | |
| 155 #else | |
| 156 return (_state >= NMT_bootstrapping_single_thread && _state <= NMT_started); | |
| 157 #endif | |
| 158 } | |
| 159 | |
| 160 // if native memory tracking tracks callsite | |
| 161 static inline bool track_callsite() { return _tracking_level == NMT_detail; } | |
| 162 | |
| 163 // shutdown native memory tracking capability. Native memory tracking | |
| 164 // can be shutdown by VM when it encounters low memory scenarios. | |
| 165 // Memory tracker should gracefully shutdown itself, and preserve the | |
| 166 // latest memory statistics for post morten diagnosis. | |
| 167 static void shutdown(ShutdownReason reason); | |
| 168 | |
| 169 // if there is shutdown requested | |
| 170 static inline bool shutdown_in_progress() { | |
| 171 return (_state >= NMT_shutdown_pending); | |
| 172 } | |
| 173 | |
| 174 // bootstrap native memory tracking, so it can start to collect raw data | |
| 175 // before worker thread can start | |
| 176 | |
| 177 // the first phase of bootstrapping, when VM still in single-threaded mode | |
| 178 static void bootstrap_single_thread(); | |
| 179 // the second phase of bootstrapping, VM is about or already in multi-threaded mode | |
| 180 static void bootstrap_multi_thread(); | |
| 181 | |
| 182 | |
| 183 // start() has to be called when VM still in single thread mode, but after | |
| 184 // command line option parsing is done. | |
| 185 static void start(); | |
| 186 | |
| 187 // record a 'malloc' call | |
| 188 static inline void record_malloc(address addr, size_t size, MEMFLAGS flags, | |
| 189 address pc = 0, Thread* thread = NULL) { | |
| 190 if (NMT_CAN_TRACK(flags)) { | |
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191 assert(size > 0, "Sanity check"); |
| 6197 | 192 create_memory_record(addr, (flags|MemPointerRecord::malloc_tag()), size, pc, thread); |
| 193 } | |
| 194 } | |
| 195 // record a 'free' call | |
| 196 static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { | |
| 197 if (is_on() && NMT_CAN_TRACK(flags)) { | |
| 198 create_memory_record(addr, MemPointerRecord::free_tag(), 0, 0, thread); | |
| 199 } | |
| 200 } | |
| 201 // record a 'realloc' call | |
| 202 static inline void record_realloc(address old_addr, address new_addr, size_t size, | |
| 203 MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { | |
| 204 if (is_on()) { | |
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205 assert(size > 0, "Sanity check"); |
| 6197 | 206 record_free(old_addr, flags, thread); |
| 207 record_malloc(new_addr, size, flags, pc, thread); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 // record arena size | |
| 212 static inline void record_arena_size(address addr, size_t size) { | |
| 213 // we add a positive offset to arena address, so we can have arena size record | |
| 214 // sorted after arena record | |
| 215 if (is_on() && !UseMallocOnly) { | |
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216 assert(addr != NULL, "Sanity check"); |
| 6197 | 217 create_memory_record((addr + sizeof(void*)), MemPointerRecord::arena_size_tag(), size, |
| 218 0, NULL); | |
| 219 } | |
| 220 } | |
| 221 | |
| 222 // record a virtual memory 'reserve' call | |
| 223 static inline void record_virtual_memory_reserve(address addr, size_t size, | |
| 224 address pc = 0, Thread* thread = NULL) { | |
| 225 if (is_on()) { | |
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226 assert(size > 0, "Sanity check"); |
| 6197 | 227 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag(), |
| 228 size, pc, thread); | |
| 229 } | |
| 230 } | |
| 231 | |
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232 static inline void record_thread_stack(address addr, size_t size, Thread* thr, |
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233 address pc = 0) { |
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234 if (is_on()) { |
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235 assert(size > 0 && thr != NULL, "Sanity check"); |
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236 create_memory_record(addr, MemPointerRecord::virtual_memory_reserve_tag() | mtThreadStack, |
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237 size, pc, thr); |
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238 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag() | mtThreadStack, |
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239 size, pc, thr); |
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240 } |
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241 } |
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242 |
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243 static inline void release_thread_stack(address addr, size_t size, Thread* thr) { |
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244 if (is_on()) { |
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245 assert(size > 0 && thr != NULL, "Sanity check"); |
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246 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag() | mtThreadStack, |
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247 size, DEBUG_CALLER_PC, thr); |
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248 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag() | mtThreadStack, |
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249 size, DEBUG_CALLER_PC, thr); |
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250 } |
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251 } |
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252 |
| 6197 | 253 // record a virtual memory 'commit' call |
| 254 static inline void record_virtual_memory_commit(address addr, size_t size, | |
| 255 address pc = 0, Thread* thread = NULL) { | |
| 256 if (is_on()) { | |
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257 assert(size > 0, "Sanity check"); |
| 6197 | 258 create_memory_record(addr, MemPointerRecord::virtual_memory_commit_tag(), |
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259 size, DEBUG_CALLER_PC, thread); |
| 6197 | 260 } |
| 261 } | |
| 262 | |
| 263 // record a virtual memory 'uncommit' call | |
| 264 static inline void record_virtual_memory_uncommit(address addr, size_t size, | |
| 265 Thread* thread = NULL) { | |
| 266 if (is_on()) { | |
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267 assert(size > 0, "Sanity check"); |
| 6197 | 268 create_memory_record(addr, MemPointerRecord::virtual_memory_uncommit_tag(), |
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269 size, DEBUG_CALLER_PC, thread); |
| 6197 | 270 } |
| 271 } | |
| 272 | |
| 273 // record a virtual memory 'release' call | |
| 274 static inline void record_virtual_memory_release(address addr, size_t size, | |
| 275 Thread* thread = NULL) { | |
| 276 if (is_on()) { | |
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277 assert(size > 0, "Sanity check"); |
| 6197 | 278 create_memory_record(addr, MemPointerRecord::virtual_memory_release_tag(), |
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279 size, DEBUG_CALLER_PC, thread); |
| 6197 | 280 } |
| 281 } | |
| 282 | |
| 283 // record memory type on virtual memory base address | |
| 284 static inline void record_virtual_memory_type(address base, MEMFLAGS flags, | |
| 285 Thread* thread = NULL) { | |
| 286 if (is_on()) { | |
| 287 assert(base > 0, "wrong base address"); | |
| 288 assert((flags & (~mt_masks)) == 0, "memory type only"); | |
| 289 create_memory_record(base, (flags | MemPointerRecord::virtual_memory_type_tag()), | |
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290 0, DEBUG_CALLER_PC, thread); |
| 6197 | 291 } |
| 292 } | |
| 293 | |
| 294 | |
| 295 // create memory baseline of current memory snapshot | |
| 296 static bool baseline(); | |
| 297 // is there a memory baseline | |
| 298 static bool has_baseline() { | |
| 299 return _baseline.baselined(); | |
| 300 } | |
| 301 | |
| 302 // print memory usage from current snapshot | |
| 303 static bool print_memory_usage(BaselineOutputer& out, size_t unit, | |
| 304 bool summary_only = true); | |
| 305 // compare memory usage between current snapshot and baseline | |
| 306 static bool compare_memory_usage(BaselineOutputer& out, size_t unit, | |
| 307 bool summary_only = true); | |
| 308 | |
| 309 // sync is called within global safepoint to synchronize nmt data | |
| 310 static void sync(); | |
| 311 | |
| 312 // called when a thread is about to exit | |
| 313 static void thread_exiting(JavaThread* thread); | |
| 314 | |
| 315 // retrieve global snapshot | |
| 316 static MemSnapshot* get_snapshot() { | |
| 317 if (shutdown_in_progress()) { | |
| 318 return NULL; | |
| 319 } | |
| 320 return _snapshot; | |
| 321 } | |
| 322 | |
| 323 // print tracker stats | |
| 324 NOT_PRODUCT(static void print_tracker_stats(outputStream* st);) | |
| 325 NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);) | |
| 326 | |
| 327 private: | |
| 328 // start native memory tracking worker thread | |
| 329 static bool start_worker(); | |
| 330 | |
| 331 // called by worker thread to complete shutdown process | |
| 332 static void final_shutdown(); | |
| 333 | |
| 334 protected: | |
| 335 // retrieve per-thread recorder of the specified thread. | |
| 336 // if the recorder is full, it will be enqueued to overflow | |
| 337 // queue, a new recorder is acquired from recorder pool or a | |
| 338 // new instance is created. | |
| 339 // when thread == NULL, it means global recorder | |
| 340 static MemRecorder* get_thread_recorder(JavaThread* thread); | |
| 341 | |
| 342 // per-thread recorder pool | |
| 343 static void release_thread_recorder(MemRecorder* rec); | |
| 344 static void delete_all_pooled_recorders(); | |
| 345 | |
| 346 // pending recorder queue. Recorders are queued to pending queue | |
| 347 // when they are overflowed or collected at nmt sync point. | |
| 348 static void enqueue_pending_recorder(MemRecorder* rec); | |
| 349 static MemRecorder* get_pending_recorders(); | |
| 350 static void delete_all_pending_recorders(); | |
| 351 | |
| 352 private: | |
| 353 // retrieve a pooled memory record or create new one if there is not | |
| 354 // one available | |
| 355 static MemRecorder* get_new_or_pooled_instance(); | |
| 356 static void create_memory_record(address addr, MEMFLAGS type, | |
| 357 size_t size, address pc, Thread* thread); | |
| 358 static void create_record_in_recorder(address addr, MEMFLAGS type, | |
| 6231 | 359 size_t size, address pc, JavaThread* thread); |
| 6197 | 360 |
| 361 private: | |
| 362 // global memory snapshot | |
| 363 static MemSnapshot* _snapshot; | |
| 364 | |
| 365 // a memory baseline of snapshot | |
| 366 static MemBaseline _baseline; | |
| 367 | |
| 368 // query lock | |
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369 static Mutex* _query_lock; |
| 6197 | 370 |
| 371 // a thread can start to allocate memory before it is attached | |
| 372 // to VM 'Thread', those memory activities are recorded here. | |
| 373 // ThreadCritical is required to guard this global recorder. | |
| 374 static MemRecorder* _global_recorder; | |
| 375 | |
| 376 // main thread id | |
| 377 debug_only(static intx _main_thread_tid;) | |
| 378 | |
| 379 // pending recorders to be merged | |
| 380 static volatile MemRecorder* _merge_pending_queue; | |
| 381 | |
| 382 NOT_PRODUCT(static volatile jint _pending_recorder_count;) | |
| 383 | |
| 384 // pooled memory recorders | |
| 385 static volatile MemRecorder* _pooled_recorders; | |
| 386 | |
| 387 // memory recorder pool management, uses following | |
| 388 // counter to determine if a released memory recorder | |
| 389 // should be pooled | |
| 390 | |
| 391 // latest thread count | |
| 392 static int _thread_count; | |
| 393 // pooled recorder count | |
| 394 static volatile jint _pooled_recorder_count; | |
| 395 | |
| 396 | |
| 397 // worker thread to merge pending recorders into snapshot | |
| 398 static MemTrackWorker* _worker_thread; | |
| 399 | |
| 400 // how many safepoints we skipped without entering sync point | |
| 401 static int _sync_point_skip_count; | |
| 402 | |
| 403 // if the tracker is properly intialized | |
| 404 static bool _is_tracker_ready; | |
| 405 // tracking level (off, summary and detail) | |
| 406 static enum NMTLevel _tracking_level; | |
| 407 | |
| 408 // current nmt state | |
| 409 static volatile enum NMTStates _state; | |
| 410 // the reason for shutting down nmt | |
| 411 static enum ShutdownReason _reason; | |
| 412 }; | |
| 413 | |
| 414 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP |