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 *
23 */
24
25#include "precompiled.hpp"
26#include "classfile/systemDictionary.hpp"
27#include "classfile/vmSymbols.hpp"
28#include "gc/shared/collectedHeap.hpp"
29#include "logging/logConfiguration.hpp"
30#include "memory/heap.hpp"
31#include "memory/memRegion.hpp"
32#include "memory/resourceArea.hpp"
33#include "oops/oop.inline.hpp"
34#include "runtime/globals.hpp"
35#include "runtime/handles.inline.hpp"
36#include "runtime/javaCalls.hpp"
37#include "services/classLoadingService.hpp"
38#include "services/lowMemoryDetector.hpp"
39#include "services/management.hpp"
40#include "services/memoryManager.hpp"
41#include "services/memoryPool.hpp"
42#include "services/memoryService.hpp"
43#include "utilities/growableArray.hpp"
44#include "utilities/macros.hpp"
45
46GrowableArray<MemoryPool*>* MemoryService::_pools_list =
47 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true);
48GrowableArray<MemoryManager*>* MemoryService::_managers_list =
49 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true);
50
51MemoryManager* MemoryService::_code_cache_manager = NULL;
52GrowableArray<MemoryPool*>* MemoryService::_code_heap_pools =
53 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_code_heap_pools_size, true);
54MemoryPool* MemoryService::_metaspace_pool = NULL;
55MemoryPool* MemoryService::_compressed_class_pool = NULL;
56
57class GcThreadCountClosure: public ThreadClosure {
58 private:
59 int _count;
60 public:
61 GcThreadCountClosure() : _count(0) {};
62 void do_thread(Thread* thread);
63 int count() { return _count; }
64};
65
66void GcThreadCountClosure::do_thread(Thread* thread) {
67 _count++;
68}
69
70void MemoryService::set_universe_heap(CollectedHeap* heap) {
71 ResourceMark rm; // For internal allocations in GrowableArray.
72
73 GrowableArray<MemoryPool*> gc_mem_pools = heap->memory_pools();
74 _pools_list->appendAll(&gc_mem_pools);
75
76 // set the GC thread count
77 GcThreadCountClosure gctcc;
78 heap->gc_threads_do(&gctcc);
79 int count = gctcc.count();
80
81 GrowableArray<GCMemoryManager*> gc_memory_managers = heap->memory_managers();
82 for (int i = 0; i < gc_memory_managers.length(); i++) {
83 GCMemoryManager* gc_manager = gc_memory_managers.at(i);
84
85 if (count > 0) {
86 gc_manager->set_num_gc_threads(count);
87 }
88 gc_manager->initialize_gc_stat_info();
89 _managers_list->append(gc_manager);
90 }
91}
92
93void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {
94 // Create new memory pool for this heap
95 MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);
96
97 // Append to lists
98 _code_heap_pools->append(code_heap_pool);
99 _pools_list->append(code_heap_pool);
100
101 if (_code_cache_manager == NULL) {
102 // Create CodeCache memory manager
103 _code_cache_manager = MemoryManager::get_code_cache_memory_manager();
104 _managers_list->append(_code_cache_manager);
105 }
106
107 _code_cache_manager->add_pool(code_heap_pool);
108}
109
110void MemoryService::add_metaspace_memory_pools() {
111 MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
112
113 _metaspace_pool = new MetaspacePool();
114 mgr->add_pool(_metaspace_pool);
115 _pools_list->append(_metaspace_pool);
116
117 if (UseCompressedClassPointers) {
118 _compressed_class_pool = new CompressedKlassSpacePool();
119 mgr->add_pool(_compressed_class_pool);
120 _pools_list->append(_compressed_class_pool);
121 }
122
123 _managers_list->append(mgr);
124}
125
126MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
127 for (int i = 0; i < _managers_list->length(); i++) {
128 MemoryManager* mgr = _managers_list->at(i);
129 if (mgr->is_manager(mh)) {
130 return mgr;
131 }
132 }
133 return NULL;
134}
135
136MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
137 for (int i = 0; i < _pools_list->length(); i++) {
138 MemoryPool* pool = _pools_list->at(i);
139 if (pool->is_pool(ph)) {
140 return pool;
141 }
142 }
143 return NULL;
144}
145
146void MemoryService::track_memory_usage() {
147 // Track the peak memory usage
148 for (int i = 0; i < _pools_list->length(); i++) {
149 MemoryPool* pool = _pools_list->at(i);
150 pool->record_peak_memory_usage();
151 }
152
153 // Detect low memory
154 LowMemoryDetector::detect_low_memory();
155}
156
157void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
158 // Track the peak memory usage
159 pool->record_peak_memory_usage();
160
161 // Detect low memory
162 if (LowMemoryDetector::is_enabled(pool)) {
163 LowMemoryDetector::detect_low_memory(pool);
164 }
165}
166
167void MemoryService::gc_begin(GCMemoryManager* manager, bool recordGCBeginTime,
168 bool recordAccumulatedGCTime,
169 bool recordPreGCUsage, bool recordPeakUsage) {
170
171 manager->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
172
173 // Track the peak memory usage when GC begins
174 if (recordPeakUsage) {
175 for (int i = 0; i < _pools_list->length(); i++) {
176 MemoryPool* pool = _pools_list->at(i);
177 pool->record_peak_memory_usage();
178 }
179 }
180}
181
182void MemoryService::gc_end(GCMemoryManager* manager, bool recordPostGCUsage,
183 bool recordAccumulatedGCTime,
184 bool recordGCEndTime, bool countCollection,
185 GCCause::Cause cause,
186 bool allMemoryPoolsAffected) {
187 // register the GC end statistics and memory usage
188 manager->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
189 countCollection, cause, allMemoryPoolsAffected);
190}
191
192void MemoryService::oops_do(OopClosure* f) {
193 int i;
194
195 for (i = 0; i < _pools_list->length(); i++) {
196 MemoryPool* pool = _pools_list->at(i);
197 pool->oops_do(f);
198 }
199 for (i = 0; i < _managers_list->length(); i++) {
200 MemoryManager* mgr = _managers_list->at(i);
201 mgr->oops_do(f);
202 }
203}
204
205bool MemoryService::set_verbose(bool verbose) {
206 MutexLocker m(Management_lock);
207 // verbose will be set to the previous value
208 if (verbose) {
209 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
210 } else {
211 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
212 }
213 ClassLoadingService::reset_trace_class_unloading();
214
215 return verbose;
216}
217
218Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
219 InstanceKlass* ik = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
220
221 JavaCallArguments args(10);
222 args.push_long(usage.init_size_as_jlong());
223 args.push_long(usage.used_as_jlong());
224 args.push_long(usage.committed_as_jlong());
225 args.push_long(usage.max_size_as_jlong());
226
227 return JavaCalls::construct_new_instance(
228 ik,
229 vmSymbols::long_long_long_long_void_signature(),
230 &args,
231 CHECK_NH);
232}
233
234TraceMemoryManagerStats::TraceMemoryManagerStats(GCMemoryManager* gc_memory_manager,
235 GCCause::Cause cause,
236 bool allMemoryPoolsAffected,
237 bool recordGCBeginTime,
238 bool recordPreGCUsage,
239 bool recordPeakUsage,
240 bool recordPostGCUsage,
241 bool recordAccumulatedGCTime,
242 bool recordGCEndTime,
243 bool countCollection) {
244 initialize(gc_memory_manager, cause, allMemoryPoolsAffected,
245 recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
246 recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
247 countCollection);
248}
249
250// for a subclass to create then initialize an instance before invoking
251// the MemoryService
252void TraceMemoryManagerStats::initialize(GCMemoryManager* gc_memory_manager,
253 GCCause::Cause cause,
254 bool allMemoryPoolsAffected,
255 bool recordGCBeginTime,
256 bool recordPreGCUsage,
257 bool recordPeakUsage,
258 bool recordPostGCUsage,
259 bool recordAccumulatedGCTime,
260 bool recordGCEndTime,
261 bool countCollection) {
262 _gc_memory_manager = gc_memory_manager;
263 _allMemoryPoolsAffected = allMemoryPoolsAffected;
264 _recordGCBeginTime = recordGCBeginTime;
265 _recordPreGCUsage = recordPreGCUsage;
266 _recordPeakUsage = recordPeakUsage;
267 _recordPostGCUsage = recordPostGCUsage;
268 _recordAccumulatedGCTime = recordAccumulatedGCTime;
269 _recordGCEndTime = recordGCEndTime;
270 _countCollection = countCollection;
271 _cause = cause;
272
273 MemoryService::gc_begin(_gc_memory_manager, _recordGCBeginTime, _recordAccumulatedGCTime,
274 _recordPreGCUsage, _recordPeakUsage);
275}
276
277TraceMemoryManagerStats::~TraceMemoryManagerStats() {
278 MemoryService::gc_end(_gc_memory_manager, _recordPostGCUsage, _recordAccumulatedGCTime,
279 _recordGCEndTime, _countCollection, _cause, _allMemoryPoolsAffected);
280}
281