1 /*
2 * Copyright (c) 2003, 2017, 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 *
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/handles.inline.hpp"
30 #include "runtime/javaCalls.hpp"
31 #include "runtime/orderAccess.inline.hpp"
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 MemoryManager::MemoryManager(const char* name) : _name(name) {
41 _num_pools = 0;
42 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
43 }
44
45 void MemoryManager::add_pool(MemoryPool* pool) {
46 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
47 if (_num_pools < MemoryManager::max_num_pools) {
48 _pools[_num_pools] = pool;
49 _num_pools++;
50 }
51 pool->add_manager(this);
52 }
53
54 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
55 return new MemoryManager("CodeCacheManager");
56 }
57
58 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
59 return new MemoryManager("Metaspace Manager");
60 }
61
62 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
63 // Must do an acquire so as to force ordering of subsequent
64 // loads from anything _memory_mgr_obj points to or implies.
65 instanceOop mgr_obj = OrderAccess::load_acquire(&_memory_mgr_obj);
66 if (mgr_obj == NULL) {
67 // It's ok for more than one thread to execute the code up to the locked region.
68 // Extra manager instances will just be gc'ed.
69 Klass* k = Management::sun_management_ManagementFactoryHelper_klass(CHECK_0);
70
71 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
171 }
172
173
174 GCMemoryManager::GCMemoryManager(const char* name, const char* gc_end_message) :
175 MemoryManager(name), _gc_end_message(gc_end_message) {
176 _num_collections = 0;
177 _last_gc_stat = NULL;
178 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true,
179 Monitor::_safepoint_check_never);
180 _current_gc_stat = NULL;
181 _num_gc_threads = 1;
182 _notification_enabled = false;
183 }
184
185 GCMemoryManager::~GCMemoryManager() {
186 delete _last_gc_stat;
187 delete _last_gc_lock;
188 delete _current_gc_stat;
189 }
190
191 void GCMemoryManager::initialize_gc_stat_info() {
192 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
193 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
194 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
195 // tracking concurrent collections we need two objects: one to update, and one to
196 // hold the publicly available "last (completed) gc" information.
197 }
198
199 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
200 bool recordAccumulatedGCTime) {
201 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
202 if (recordAccumulatedGCTime) {
203 _accumulated_timer.start();
204 }
205 // _num_collections now increases in gc_end, to count completed collections
206 if (recordGCBeginTime) {
207 _current_gc_stat->set_index(_num_collections+1);
208 _current_gc_stat->set_start_time(Management::timestamp());
209 }
210
211 if (recordPreGCUsage) {
212 // Keep memory usage of all memory pools
213 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
214 MemoryPool* pool = MemoryService::get_memory_pool(i);
215 MemoryUsage usage = pool->get_memory_usage();
216 _current_gc_stat->set_before_gc_usage(i, usage);
217 HOTSPOT_MEM_POOL_GC_BEGIN(
218 (char *) name(), strlen(name()),
219 (char *) pool->name(), strlen(pool->name()),
220 usage.init_size(), usage.used(),
221 usage.committed(), usage.max_size());
222 }
223 }
224 }
225
226 // A collector MUST, even if it does not complete for some reason,
227 // make a TraceMemoryManagerStats object where countCollection is true,
228 // to ensure the current gc stat is placed in _last_gc_stat.
229 void GCMemoryManager::gc_end(bool recordPostGCUsage,
230 bool recordAccumulatedGCTime,
231 bool recordGCEndTime, bool countCollection,
232 GCCause::Cause cause) {
233 if (recordAccumulatedGCTime) {
234 _accumulated_timer.stop();
235 }
236 if (recordGCEndTime) {
237 _current_gc_stat->set_end_time(Management::timestamp());
238 }
239
240 if (recordPostGCUsage) {
241 int i;
242 // keep the last gc statistics for all memory pools
243 for (i = 0; i < MemoryService::num_memory_pools(); i++) {
244 MemoryPool* pool = MemoryService::get_memory_pool(i);
245 MemoryUsage usage = pool->get_memory_usage();
246
247 HOTSPOT_MEM_POOL_GC_END(
248 (char *) name(), strlen(name()),
249 (char *) pool->name(), strlen(pool->name()),
250 usage.init_size(), usage.used(),
251 usage.committed(), usage.max_size());
252
253 _current_gc_stat->set_after_gc_usage(i, usage);
254 }
255
256 // Set last collection usage of the memory pools managed by this collector
257 for (i = 0; i < num_memory_pools(); i++) {
258 MemoryPool* pool = get_memory_pool(i);
259 MemoryUsage usage = pool->get_memory_usage();
260
261 // Compare with GC usage threshold
262 pool->set_last_collection_usage(usage);
263 LowMemoryDetector::detect_after_gc_memory(pool);
264 }
265 }
266
267 if (countCollection) {
268 _num_collections++;
269 // alternately update two objects making one public when complete
270 {
271 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
272 GCStatInfo *tmp = _last_gc_stat;
273 _last_gc_stat = _current_gc_stat;
274 _current_gc_stat = tmp;
275 // reset the current stat for diagnosability purposes
276 _current_gc_stat->clear();
277 }
278
279 if (is_notification_enabled()) {
280 GCNotifier::pushNotification(this, _gc_end_message, GCCause::to_string(cause));
281 }
282 }
283 }
284
285 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) {
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1 /*
2 * Copyright (c) 2003, 2018, 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 *
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "oops/oop.inline.hpp"
29 #include "runtime/handles.inline.hpp"
30 #include "runtime/javaCalls.hpp"
31 #include "runtime/orderAccess.inline.hpp"
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 MemoryManager::MemoryManager(const char* name) : _name(name) {
41 _num_pools = 0;
42 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
43 }
44
45 int MemoryManager::add_pool(MemoryPool* pool) {
46 int index = _num_pools;
47 assert(index < MemoryManager::max_num_pools, "_num_pools exceeds the max");
48 if (index < MemoryManager::max_num_pools) {
49 _pools[index] = pool;
50 _num_pools++;
51 }
52 pool->add_manager(this);
53 return index;
54 }
55
56 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
57 return new MemoryManager("CodeCacheManager");
58 }
59
60 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
61 return new MemoryManager("Metaspace Manager");
62 }
63
64 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
65 // Must do an acquire so as to force ordering of subsequent
66 // loads from anything _memory_mgr_obj points to or implies.
67 instanceOop mgr_obj = OrderAccess::load_acquire(&_memory_mgr_obj);
68 if (mgr_obj == NULL) {
69 // It's ok for more than one thread to execute the code up to the locked region.
70 // Extra manager instances will just be gc'ed.
71 Klass* k = Management::sun_management_ManagementFactoryHelper_klass(CHECK_0);
72
73 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
173 }
174
175
176 GCMemoryManager::GCMemoryManager(const char* name, const char* gc_end_message) :
177 MemoryManager(name), _gc_end_message(gc_end_message) {
178 _num_collections = 0;
179 _last_gc_stat = NULL;
180 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true,
181 Monitor::_safepoint_check_never);
182 _current_gc_stat = NULL;
183 _num_gc_threads = 1;
184 _notification_enabled = false;
185 }
186
187 GCMemoryManager::~GCMemoryManager() {
188 delete _last_gc_stat;
189 delete _last_gc_lock;
190 delete _current_gc_stat;
191 }
192
193 int GCMemoryManager::add_pool(MemoryPool* pool, bool always_affected_by_gc) {
194 int index = MemoryManager::add_pool(pool);
195 _pool_always_affected_by_gc[index] = always_affected_by_gc;
196 return index;
197 }
198
199 void GCMemoryManager::initialize_gc_stat_info() {
200 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
201 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
202 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
203 // tracking concurrent collections we need two objects: one to update, and one to
204 // hold the publicly available "last (completed) gc" information.
205 }
206
207 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
208 bool recordAccumulatedGCTime) {
209 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
210 if (recordAccumulatedGCTime) {
211 _accumulated_timer.start();
212 }
213 // _num_collections now increases in gc_end, to count completed collections
214 if (recordGCBeginTime) {
215 _current_gc_stat->set_index(_num_collections+1);
216 _current_gc_stat->set_start_time(Management::timestamp());
217 }
218
219 if (recordPreGCUsage) {
220 // Keep memory usage of all memory pools
221 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
222 MemoryPool* pool = MemoryService::get_memory_pool(i);
223 MemoryUsage usage = pool->get_memory_usage();
224 _current_gc_stat->set_before_gc_usage(i, usage);
225 HOTSPOT_MEM_POOL_GC_BEGIN(
226 (char *) name(), strlen(name()),
227 (char *) pool->name(), strlen(pool->name()),
228 usage.init_size(), usage.used(),
229 usage.committed(), usage.max_size());
230 }
231 }
232 }
233
234 // A collector MUST, even if it does not complete for some reason,
235 // make a TraceMemoryManagerStats object where countCollection is true,
236 // to ensure the current gc stat is placed in _last_gc_stat.
237 void GCMemoryManager::gc_end(bool recordPostGCUsage,
238 bool recordAccumulatedGCTime,
239 bool recordGCEndTime, bool countCollection,
240 GCCause::Cause cause,
241 bool allMemoryPoolsAffected) {
242 if (recordAccumulatedGCTime) {
243 _accumulated_timer.stop();
244 }
245 if (recordGCEndTime) {
246 _current_gc_stat->set_end_time(Management::timestamp());
247 }
248
249 if (recordPostGCUsage) {
250 int i;
251 // keep the last gc statistics for all memory pools
252 for (i = 0; i < MemoryService::num_memory_pools(); i++) {
253 MemoryPool* pool = MemoryService::get_memory_pool(i);
254 MemoryUsage usage = pool->get_memory_usage();
255
256 HOTSPOT_MEM_POOL_GC_END(
257 (char *) name(), strlen(name()),
258 (char *) pool->name(), strlen(pool->name()),
259 usage.init_size(), usage.used(),
260 usage.committed(), usage.max_size());
261
262 _current_gc_stat->set_after_gc_usage(i, usage);
263 }
264
265 // Set last collection usage of the memory pools managed by this collector
266 for (i = 0; i < num_memory_pools(); i++) {
267 MemoryPool* pool = get_memory_pool(i);
268 MemoryUsage usage = pool->get_memory_usage();
269
270 if (allMemoryPoolsAffected || pool_always_affected_by_gc(i)) {
271 // Compare with GC usage threshold
272 pool->set_last_collection_usage(usage);
273 LowMemoryDetector::detect_after_gc_memory(pool);
274 }
275 }
276 }
277
278 if (countCollection) {
279 _num_collections++;
280 // alternately update two objects making one public when complete
281 {
282 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
283 GCStatInfo *tmp = _last_gc_stat;
284 _last_gc_stat = _current_gc_stat;
285 _current_gc_stat = tmp;
286 // reset the current stat for diagnosability purposes
287 _current_gc_stat->clear();
288 }
289
290 if (is_notification_enabled()) {
291 GCNotifier::pushNotification(this, _gc_end_message, GCCause::to_string(cause));
292 }
293 }
294 }
295
296 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) {
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