1 /*
2 * Copyright (c) 2003, 2014, 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 *
32 #include "services/lowMemoryDetector.hpp"
33 #include "services/management.hpp"
34 #include "services/memoryManager.hpp"
35 #include "services/memoryPool.hpp"
36 #include "services/memoryService.hpp"
37 #include "services/gcNotifier.hpp"
38 #include "utilities/dtrace.hpp"
39
40 #ifndef USDT2
41 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int,
42 size_t, size_t, size_t, size_t);
43 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int,
44 size_t, size_t, size_t, size_t);
45 #endif /* !USDT2 */
46
47 MemoryManager::MemoryManager() {
48 _num_pools = 0;
49 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
50 }
51
52 void MemoryManager::add_pool(MemoryPool* pool) {
53 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
54 if (_num_pools < MemoryManager::max_num_pools) {
55 _pools[_num_pools] = pool;
56 _num_pools++;
57 }
58 pool->add_manager(this);
59 }
60
61 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
62 return (MemoryManager*) new CodeCacheMemoryManager();
63 }
64
65 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
66 return (MemoryManager*) new MetaspaceMemoryManager();
67 }
68
69 GCMemoryManager* MemoryManager::get_copy_memory_manager() {
70 return (GCMemoryManager*) new CopyMemoryManager();
71 }
72
73 GCMemoryManager* MemoryManager::get_msc_memory_manager() {
74 return (GCMemoryManager*) new MSCMemoryManager();
75 }
76
77 GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
78 return (GCMemoryManager*) new ParNewMemoryManager();
200 memset(_before_gc_usage_array, 0, len);
201 memset(_after_gc_usage_array, 0, len);
202 }
203
204
205 GCMemoryManager::GCMemoryManager() : MemoryManager() {
206 _num_collections = 0;
207 _last_gc_stat = NULL;
208 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true);
209 _current_gc_stat = NULL;
210 _num_gc_threads = 1;
211 _notification_enabled = false;
212 }
213
214 GCMemoryManager::~GCMemoryManager() {
215 delete _last_gc_stat;
216 delete _last_gc_lock;
217 delete _current_gc_stat;
218 }
219
220 void GCMemoryManager::initialize_gc_stat_info() {
221 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
222 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
223 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
224 // tracking concurrent collections we need two objects: one to update, and one to
225 // hold the publicly available "last (completed) gc" information.
226 }
227
228 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
229 bool recordAccumulatedGCTime) {
230 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
231 if (recordAccumulatedGCTime) {
232 _accumulated_timer.start();
233 }
234 // _num_collections now increases in gc_end, to count completed collections
235 if (recordGCBeginTime) {
236 _current_gc_stat->set_index(_num_collections+1);
237 _current_gc_stat->set_start_time(Management::timestamp());
238 }
239
249 pool->name(), strlen(pool->name()),
250 usage.init_size(), usage.used(),
251 usage.committed(), usage.max_size());
252 #else /* USDT2 */
253 HOTSPOT_MEM_POOL_GC_BEGIN(
254 (char *) name(), strlen(name()),
255 (char *) pool->name(), strlen(pool->name()),
256 usage.init_size(), usage.used(),
257 usage.committed(), usage.max_size());
258 #endif /* USDT2 */
259 }
260 }
261 }
262
263 // A collector MUST, even if it does not complete for some reason,
264 // make a TraceMemoryManagerStats object where countCollection is true,
265 // to ensure the current gc stat is placed in _last_gc_stat.
266 void GCMemoryManager::gc_end(bool recordPostGCUsage,
267 bool recordAccumulatedGCTime,
268 bool recordGCEndTime, bool countCollection,
269 GCCause::Cause cause) {
270 if (recordAccumulatedGCTime) {
271 _accumulated_timer.stop();
272 }
273 if (recordGCEndTime) {
274 _current_gc_stat->set_end_time(Management::timestamp());
275 }
276
277 if (recordPostGCUsage) {
278 int i;
279 // keep the last gc statistics for all memory pools
280 for (i = 0; i < MemoryService::num_memory_pools(); i++) {
281 MemoryPool* pool = MemoryService::get_memory_pool(i);
282 MemoryUsage usage = pool->get_memory_usage();
283
284 #ifndef USDT2
285 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end,
286 name(), strlen(name()),
287 pool->name(), strlen(pool->name()),
288 usage.init_size(), usage.used(),
289 usage.committed(), usage.max_size());
290 #else /* USDT2 */
291 HOTSPOT_MEM_POOL_GC_END(
292 (char *) name(), strlen(name()),
293 (char *) pool->name(), strlen(pool->name()),
294 usage.init_size(), usage.used(),
295 usage.committed(), usage.max_size());
296 #endif /* USDT2 */
297
298 _current_gc_stat->set_after_gc_usage(i, usage);
299 }
300
301 // Set last collection usage of the memory pools managed by this collector
302 for (i = 0; i < num_memory_pools(); i++) {
303 MemoryPool* pool = get_memory_pool(i);
304 MemoryUsage usage = pool->get_memory_usage();
305
306 // Compare with GC usage threshold
307 pool->set_last_collection_usage(usage);
308 LowMemoryDetector::detect_after_gc_memory(pool);
309 }
310 }
311
312 if (countCollection) {
313 _num_collections++;
314 // alternately update two objects making one public when complete
315 {
316 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
317 GCStatInfo *tmp = _last_gc_stat;
318 _last_gc_stat = _current_gc_stat;
319 _current_gc_stat = tmp;
320 // reset the current stat for diagnosability purposes
321 _current_gc_stat->clear();
322 }
323
324 if (is_notification_enabled()) {
325 bool isMajorGC = this == MemoryService::get_major_gc_manager();
326 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC",
327 GCCause::to_string(cause));
328 }
329 }
330 }
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1 /*
2 * Copyright (c) 2003, 2019, 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 *
32 #include "services/lowMemoryDetector.hpp"
33 #include "services/management.hpp"
34 #include "services/memoryManager.hpp"
35 #include "services/memoryPool.hpp"
36 #include "services/memoryService.hpp"
37 #include "services/gcNotifier.hpp"
38 #include "utilities/dtrace.hpp"
39
40 #ifndef USDT2
41 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__begin, char*, int, char*, int,
42 size_t, size_t, size_t, size_t);
43 HS_DTRACE_PROBE_DECL8(hotspot, mem__pool__gc__end, char*, int, char*, int,
44 size_t, size_t, size_t, size_t);
45 #endif /* !USDT2 */
46
47 MemoryManager::MemoryManager() {
48 _num_pools = 0;
49 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
50 }
51
52 int MemoryManager::add_pool(MemoryPool* pool) {
53 int index = _num_pools;
54 assert(index < MemoryManager::max_num_pools, "_num_pools exceeds the max");
55 if (index < MemoryManager::max_num_pools) {
56 _pools[index] = pool;
57 _num_pools++;
58 }
59 pool->add_manager(this);
60 return index;
61 }
62
63 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
64 return (MemoryManager*) new CodeCacheMemoryManager();
65 }
66
67 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
68 return (MemoryManager*) new MetaspaceMemoryManager();
69 }
70
71 GCMemoryManager* MemoryManager::get_copy_memory_manager() {
72 return (GCMemoryManager*) new CopyMemoryManager();
73 }
74
75 GCMemoryManager* MemoryManager::get_msc_memory_manager() {
76 return (GCMemoryManager*) new MSCMemoryManager();
77 }
78
79 GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
80 return (GCMemoryManager*) new ParNewMemoryManager();
202 memset(_before_gc_usage_array, 0, len);
203 memset(_after_gc_usage_array, 0, len);
204 }
205
206
207 GCMemoryManager::GCMemoryManager() : MemoryManager() {
208 _num_collections = 0;
209 _last_gc_stat = NULL;
210 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true);
211 _current_gc_stat = NULL;
212 _num_gc_threads = 1;
213 _notification_enabled = false;
214 }
215
216 GCMemoryManager::~GCMemoryManager() {
217 delete _last_gc_stat;
218 delete _last_gc_lock;
219 delete _current_gc_stat;
220 }
221
222 void GCMemoryManager::add_pool(MemoryPool* pool) {
223 add_pool(pool, true);
224 }
225
226 void GCMemoryManager::add_pool(MemoryPool* pool, bool always_affected_by_gc) {
227 int index = MemoryManager::add_pool(pool);
228 _pool_always_affected_by_gc[index] = always_affected_by_gc;
229 }
230
231 void GCMemoryManager::initialize_gc_stat_info() {
232 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
233 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
234 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
235 // tracking concurrent collections we need two objects: one to update, and one to
236 // hold the publicly available "last (completed) gc" information.
237 }
238
239 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
240 bool recordAccumulatedGCTime) {
241 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
242 if (recordAccumulatedGCTime) {
243 _accumulated_timer.start();
244 }
245 // _num_collections now increases in gc_end, to count completed collections
246 if (recordGCBeginTime) {
247 _current_gc_stat->set_index(_num_collections+1);
248 _current_gc_stat->set_start_time(Management::timestamp());
249 }
250
260 pool->name(), strlen(pool->name()),
261 usage.init_size(), usage.used(),
262 usage.committed(), usage.max_size());
263 #else /* USDT2 */
264 HOTSPOT_MEM_POOL_GC_BEGIN(
265 (char *) name(), strlen(name()),
266 (char *) pool->name(), strlen(pool->name()),
267 usage.init_size(), usage.used(),
268 usage.committed(), usage.max_size());
269 #endif /* USDT2 */
270 }
271 }
272 }
273
274 // A collector MUST, even if it does not complete for some reason,
275 // make a TraceMemoryManagerStats object where countCollection is true,
276 // to ensure the current gc stat is placed in _last_gc_stat.
277 void GCMemoryManager::gc_end(bool recordPostGCUsage,
278 bool recordAccumulatedGCTime,
279 bool recordGCEndTime, bool countCollection,
280 GCCause::Cause cause,
281 bool allMemoryPoolsAffected) {
282 if (recordAccumulatedGCTime) {
283 _accumulated_timer.stop();
284 }
285 if (recordGCEndTime) {
286 _current_gc_stat->set_end_time(Management::timestamp());
287 }
288
289 if (recordPostGCUsage) {
290 int i;
291 // keep the last gc statistics for all memory pools
292 for (i = 0; i < MemoryService::num_memory_pools(); i++) {
293 MemoryPool* pool = MemoryService::get_memory_pool(i);
294 MemoryUsage usage = pool->get_memory_usage();
295
296 #ifndef USDT2
297 HS_DTRACE_PROBE8(hotspot, mem__pool__gc__end,
298 name(), strlen(name()),
299 pool->name(), strlen(pool->name()),
300 usage.init_size(), usage.used(),
301 usage.committed(), usage.max_size());
302 #else /* USDT2 */
303 HOTSPOT_MEM_POOL_GC_END(
304 (char *) name(), strlen(name()),
305 (char *) pool->name(), strlen(pool->name()),
306 usage.init_size(), usage.used(),
307 usage.committed(), usage.max_size());
308 #endif /* USDT2 */
309
310 _current_gc_stat->set_after_gc_usage(i, usage);
311 }
312
313 // Set last collection usage of the memory pools managed by this collector
314 for (i = 0; i < num_memory_pools(); i++) {
315 MemoryPool* pool = get_memory_pool(i);
316 MemoryUsage usage = pool->get_memory_usage();
317
318 // Compare with GC usage threshold
319 if (allMemoryPoolsAffected || pool_always_affected_by_gc(i)) {
320 // Compare with GC usage threshold
321 pool->set_last_collection_usage(usage);
322 LowMemoryDetector::detect_after_gc_memory(pool);
323 }
324 }
325 }
326
327 if (countCollection) {
328 _num_collections++;
329 // alternately update two objects making one public when complete
330 {
331 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
332 GCStatInfo *tmp = _last_gc_stat;
333 _last_gc_stat = _current_gc_stat;
334 _current_gc_stat = tmp;
335 // reset the current stat for diagnosability purposes
336 _current_gc_stat->clear();
337 }
338
339 if (is_notification_enabled()) {
340 bool isMajorGC = this == MemoryService::get_major_gc_manager();
341 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC",
342 GCCause::to_string(cause));
343 }
344 }
345 }
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