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 "oops/oop.inline.hpp"
33 #include "runtime/globals.hpp"
34 #include "runtime/handles.inline.hpp"
35 #include "runtime/javaCalls.hpp"
36 #include "services/classLoadingService.hpp"
37 #include "services/lowMemoryDetector.hpp"
38 #include "services/management.hpp"
39 #include "services/memoryManager.hpp"
40 #include "services/memoryPool.hpp"
41 #include "services/memoryService.hpp"
42 #include "utilities/growableArray.hpp"
43 #include "utilities/macros.hpp"
44
45 GrowableArray<MemoryPool*>* MemoryService::_pools_list =
46 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true);
47 GrowableArray<MemoryManager*>* MemoryService::_managers_list =
48 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true);
49
50 MemoryManager* MemoryService::_code_cache_manager = NULL;
51 GrowableArray<MemoryPool*>* MemoryService::_code_heap_pools =
52 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_code_heap_pools_size, true);
53 MemoryPool* MemoryService::_metaspace_pool = NULL;
54 MemoryPool* MemoryService::_compressed_class_pool = NULL;
55
56 class GcThreadCountClosure: public ThreadClosure {
57 private:
58 int _count;
59 public:
60 GcThreadCountClosure() : _count(0) {};
61 void do_thread(Thread* thread);
62 int count() { return _count; }
63 };
64
65 void GcThreadCountClosure::do_thread(Thread* thread) {
66 _count++;
67 }
68
69 void MemoryService::set_universe_heap(CollectedHeap* heap) {
70 ResourceMark rm; // For internal allocations in GrowableArray.
71
72 GrowableArray<MemoryPool*> gc_mem_pools = heap->memory_pools();
73 _pools_list->appendAll(&gc_mem_pools);
74
75 // set the GC thread count
76 GcThreadCountClosure gctcc;
77 heap->gc_threads_do(&gctcc);
78 int count = gctcc.count();
79
80 GrowableArray<GCMemoryManager*> gc_memory_managers = heap->memory_managers();
81 for (int i = 0; i < gc_memory_managers.length(); i++) {
82 GCMemoryManager* gc_manager = gc_memory_managers.at(i);
83
84 if (count > 0) {
85 gc_manager->set_num_gc_threads(count);
86 }
87 gc_manager->initialize_gc_stat_info();
88 _managers_list->append(gc_manager);
89 }
90 }
91
92 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {
93 // Create new memory pool for this heap
94 MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);
95
96 // Append to lists
97 _code_heap_pools->append(code_heap_pool);
98 _pools_list->append(code_heap_pool);
99
100 if (_code_cache_manager == NULL) {
101 // Create CodeCache memory manager
102 _code_cache_manager = MemoryManager::get_code_cache_memory_manager();
103 _managers_list->append(_code_cache_manager);
104 }
105
106 _code_cache_manager->add_pool(code_heap_pool);
107 }
108
109 void MemoryService::add_metaspace_memory_pools() {
110 MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
111
112 _metaspace_pool = new MetaspacePool();
113 mgr->add_pool(_metaspace_pool);
114 _pools_list->append(_metaspace_pool);
115
116 if (UseCompressedClassPointers) {
117 _compressed_class_pool = new CompressedKlassSpacePool();
118 mgr->add_pool(_compressed_class_pool);
119 _pools_list->append(_compressed_class_pool);
120 }
121
122 _managers_list->append(mgr);
123 }
124
125 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
126 for (int i = 0; i < _managers_list->length(); i++) {
127 MemoryManager* mgr = _managers_list->at(i);
128 if (mgr->is_manager(mh)) {
129 return mgr;
130 }
131 }
132 return NULL;
133 }
134
135 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
136 for (int i = 0; i < _pools_list->length(); i++) {
137 MemoryPool* pool = _pools_list->at(i);
138 if (pool->is_pool(ph)) {
139 return pool;
140 }
141 }
142 return NULL;
143 }
144
145 void MemoryService::track_memory_usage() {
146 // Track the peak memory usage
147 for (int i = 0; i < _pools_list->length(); i++) {
148 MemoryPool* pool = _pools_list->at(i);
149 pool->record_peak_memory_usage();
150 }
151
152 // Detect low memory
153 LowMemoryDetector::detect_low_memory();
154 }
155
156 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
157 // Track the peak memory usage
158 pool->record_peak_memory_usage();
159
160 // Detect low memory
161 if (LowMemoryDetector::is_enabled(pool)) {
162 LowMemoryDetector::detect_low_memory(pool);
163 }
164 }
165
166 void MemoryService::gc_begin(GCMemoryManager* manager, bool recordGCBeginTime,
167 bool recordAccumulatedGCTime,
168 bool recordPreGCUsage, bool recordPeakUsage) {
169
170 manager->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
171
172 // Track the peak memory usage when GC begins
173 if (recordPeakUsage) {
174 for (int i = 0; i < _pools_list->length(); i++) {
175 MemoryPool* pool = _pools_list->at(i);
176 pool->record_peak_memory_usage();
177 }
178 }
179 }
180
181 void MemoryService::gc_end(GCMemoryManager* manager, bool recordPostGCUsage,
182 bool recordAccumulatedGCTime,
183 bool recordGCEndTime, bool countCollection,
184 GCCause::Cause cause) {
185 // register the GC end statistics and memory usage
186 manager->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
187 countCollection, cause);
188 }
189
190 void MemoryService::oops_do(OopClosure* f) {
191 int i;
192
193 for (i = 0; i < _pools_list->length(); i++) {
194 MemoryPool* pool = _pools_list->at(i);
195 pool->oops_do(f);
196 }
197 for (i = 0; i < _managers_list->length(); i++) {
198 MemoryManager* mgr = _managers_list->at(i);
199 mgr->oops_do(f);
200 }
201 }
202
203 bool MemoryService::set_verbose(bool verbose) {
204 MutexLocker m(Management_lock);
205 // verbose will be set to the previous value
206 if (verbose) {
207 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
208 } else {
209 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
210 }
211 ClassLoadingService::reset_trace_class_unloading();
212
213 return verbose;
214 }
215
216 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
217 InstanceKlass* ik = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
218
219 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
220
221 JavaValue result(T_VOID);
222 JavaCallArguments args(10);
223 args.push_oop(obj); // receiver
224 args.push_long(usage.init_size_as_jlong()); // Argument 1
225 args.push_long(usage.used_as_jlong()); // Argument 2
226 args.push_long(usage.committed_as_jlong()); // Argument 3
227 args.push_long(usage.max_size_as_jlong()); // Argument 4
228
229 JavaCalls::call_special(&result,
230 ik,
231 vmSymbols::object_initializer_name(),
232 vmSymbols::long_long_long_long_void_signature(),
233 &args,
234 CHECK_NH);
235 return obj;
236 }
237
238 TraceMemoryManagerStats::TraceMemoryManagerStats(GCMemoryManager* gc_memory_manager,
239 GCCause::Cause cause,
240 bool recordGCBeginTime,
241 bool recordPreGCUsage,
242 bool recordPeakUsage,
243 bool recordPostGCUsage,
244 bool recordAccumulatedGCTime,
245 bool recordGCEndTime,
246 bool countCollection) {
247 initialize(gc_memory_manager, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
248 recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
249 countCollection);
250 }
251
252 // for a subclass to create then initialize an instance before invoking
253 // the MemoryService
254 void TraceMemoryManagerStats::initialize(GCMemoryManager* gc_memory_manager,
255 GCCause::Cause cause,
256 bool recordGCBeginTime,
257 bool recordPreGCUsage,
258 bool recordPeakUsage,
259 bool recordPostGCUsage,
260 bool recordAccumulatedGCTime,
261 bool recordGCEndTime,
262 bool countCollection) {
263 _gc_memory_manager = gc_memory_manager;
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
277 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
278 MemoryService::gc_end(_gc_memory_manager, _recordPostGCUsage, _recordAccumulatedGCTime,
279 _recordGCEndTime, _countCollection, _cause);
280 }