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 *
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/javaCalls.hpp"
35 #include "services/classLoadingService.hpp"
36 #include "services/lowMemoryDetector.hpp"
37 #include "services/management.hpp"
38 #include "services/memoryManager.hpp"
39 #include "services/memoryPool.hpp"
40 #include "services/memoryService.hpp"
41 #include "utilities/growableArray.hpp"
42 #include "utilities/macros.hpp"
43
44 GrowableArray<MemoryPool*>* MemoryService::_pools_list =
45 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_pools_list_size, true);
46 GrowableArray<MemoryManager*>* MemoryService::_managers_list =
47 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryManager*>(init_managers_list_size, true);
48
49 MemoryManager* MemoryService::_code_cache_manager = NULL;
50 GrowableArray<MemoryPool*>* MemoryService::_code_heap_pools =
51 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<MemoryPool*>(init_code_heap_pools_size, true);
52 MemoryPool* MemoryService::_metaspace_pool = NULL;
53 MemoryPool* MemoryService::_compressed_class_pool = NULL;
54
55 class GcThreadCountClosure: public ThreadClosure {
56 private:
57 int _count;
58 public:
59 GcThreadCountClosure() : _count(0) {};
60 void do_thread(Thread* thread);
61 int count() { return _count; }
62 };
63
64 void GcThreadCountClosure::do_thread(Thread* thread) {
65 _count++;
66 }
67
68 void MemoryService::set_universe_heap(CollectedHeap* heap) {
69 ResourceMark rm; // For internal allocations in GrowableArray.
70
71 GrowableArray<MemoryPool*> gc_mem_pools = heap->memory_pools();
72 _pools_list->appendAll(&gc_mem_pools);
73
74 // set the GC thread count
75 GcThreadCountClosure gctcc;
76 heap->gc_threads_do(&gctcc);
77 int count = gctcc.count();
78
79 GrowableArray<GCMemoryManager*> gc_mem_mgrs = heap->memory_managers();
80 for (int i = 0; i < gc_mem_mgrs.length(); i++) {
81 GCMemoryManager* gc_mgr = gc_mem_mgrs.at(i);
82
83 if (count > 0) {
84 gc_mgr->set_num_gc_threads(count);
85 }
86 gc_mgr->initialize_gc_stat_info();
87 _managers_list->append(gc_mgr);
88 }
89 }
90
91 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {
92 // Create new memory pool for this heap
93 MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);
94
95 // Append to lists
96 _code_heap_pools->append(code_heap_pool);
97 _pools_list->append(code_heap_pool);
98
99 if (_code_cache_manager == NULL) {
100 // Create CodeCache memory manager
101 _code_cache_manager = MemoryManager::get_code_cache_memory_manager();
102 _managers_list->append(_code_cache_manager);
103 }
104
105 _code_cache_manager->add_pool(code_heap_pool);
106 }
107
108 void MemoryService::add_metaspace_memory_pools() {
109 MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
110
111 _metaspace_pool = new MetaspacePool();
112 mgr->add_pool(_metaspace_pool);
113 _pools_list->append(_metaspace_pool);
114
115 if (UseCompressedClassPointers) {
116 _compressed_class_pool = new CompressedKlassSpacePool();
117 mgr->add_pool(_compressed_class_pool);
118 _pools_list->append(_compressed_class_pool);
119 }
120
121 _managers_list->append(mgr);
122 }
123
124 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
125 for (int i = 0; i < _managers_list->length(); i++) {
126 MemoryManager* mgr = _managers_list->at(i);
127 if (mgr->is_manager(mh)) {
128 return mgr;
129 }
130 }
131 return NULL;
132 }
133
134 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
135 for (int i = 0; i < _pools_list->length(); i++) {
136 MemoryPool* pool = _pools_list->at(i);
137 if (pool->is_pool(ph)) {
138 return pool;
139 }
140 }
141 return NULL;
142 }
143
144 void MemoryService::track_memory_usage() {
145 // Track the peak memory usage
146 for (int i = 0; i < _pools_list->length(); i++) {
147 MemoryPool* pool = _pools_list->at(i);
148 pool->record_peak_memory_usage();
149 }
150
151 // Detect low memory
152 LowMemoryDetector::detect_low_memory();
153 }
154
155 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
156 // Track the peak memory usage
157 pool->record_peak_memory_usage();
158
159 // Detect low memory
160 if (LowMemoryDetector::is_enabled(pool)) {
161 LowMemoryDetector::detect_low_memory(pool);
162 }
163 }
164
165 void MemoryService::gc_begin(GCMemoryManager* mgr, bool recordGCBeginTime,
166 bool recordAccumulatedGCTime,
167 bool recordPreGCUsage, bool recordPeakUsage) {
168
169 mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
170
171 // Track the peak memory usage when GC begins
172 if (recordPeakUsage) {
173 for (int i = 0; i < _pools_list->length(); i++) {
174 MemoryPool* pool = _pools_list->at(i);
175 pool->record_peak_memory_usage();
176 }
177 }
178 }
179
180 void MemoryService::gc_end(GCMemoryManager* mgr, bool recordPostGCUsage,
181 bool recordAccumulatedGCTime,
182 bool recordGCEndTime, bool countCollection,
183 GCCause::Cause cause) {
184 // register the GC end statistics and memory usage
185 mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
186 countCollection, cause);
187 }
188
189 void MemoryService::oops_do(OopClosure* f) {
190 int i;
191
192 for (i = 0; i < _pools_list->length(); i++) {
193 MemoryPool* pool = _pools_list->at(i);
194 pool->oops_do(f);
195 }
196 for (i = 0; i < _managers_list->length(); i++) {
197 MemoryManager* mgr = _managers_list->at(i);
198 mgr->oops_do(f);
199 }
200 }
201
202 bool MemoryService::set_verbose(bool verbose) {
203 MutexLocker m(Management_lock);
204 // verbose will be set to the previous value
205 if (verbose) {
206 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
207 } else {
208 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
209 }
210 ClassLoadingService::reset_trace_class_unloading();
211
212 return verbose;
213 }
214
215 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
216 InstanceKlass* ik = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
217
218 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
219
220 JavaValue result(T_VOID);
221 JavaCallArguments args(10);
222 args.push_oop(obj); // receiver
223 args.push_long(usage.init_size_as_jlong()); // Argument 1
224 args.push_long(usage.used_as_jlong()); // Argument 2
225 args.push_long(usage.committed_as_jlong()); // Argument 3
226 args.push_long(usage.max_size_as_jlong()); // Argument 4
227
228 JavaCalls::call_special(&result,
229 ik,
230 vmSymbols::object_initializer_name(),
231 vmSymbols::long_long_long_long_void_signature(),
232 &args,
233 CHECK_NH);
234 return obj;
235 }
236
237 TraceMemoryManagerStats::TraceMemoryManagerStats(GCMemoryManager* gc_mem_mgr,
238 GCCause::Cause cause,
239 bool recordGCBeginTime,
240 bool recordPreGCUsage,
241 bool recordPeakUsage,
242 bool recordPostGCUsage,
243 bool recordAccumulatedGCTime,
244 bool recordGCEndTime,
245 bool countCollection) {
246 initialize(gc_mem_mgr, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
247 recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
248 countCollection);
249 }
250
251 // for a subclass to create then initialize an instance before invoking
252 // the MemoryService
253 void TraceMemoryManagerStats::initialize(GCMemoryManager* gc_mem_mgr,
254 GCCause::Cause cause,
255 bool recordGCBeginTime,
256 bool recordPreGCUsage,
257 bool recordPeakUsage,
258 bool recordPostGCUsage,
259 bool recordAccumulatedGCTime,
260 bool recordGCEndTime,
261 bool countCollection) {
262 _gc_mem_mgr = gc_mem_mgr;
263 _recordGCBeginTime = recordGCBeginTime;
264 _recordPreGCUsage = recordPreGCUsage;
265 _recordPeakUsage = recordPeakUsage;
266 _recordPostGCUsage = recordPostGCUsage;
267 _recordAccumulatedGCTime = recordAccumulatedGCTime;
268 _recordGCEndTime = recordGCEndTime;
269 _countCollection = countCollection;
270 _cause = cause;
271
272 MemoryService::gc_begin(_gc_mem_mgr, _recordGCBeginTime, _recordAccumulatedGCTime,
273 _recordPreGCUsage, _recordPeakUsage);
274 }
275
276 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
277 MemoryService::gc_end(_gc_mem_mgr, _recordPostGCUsage, _recordAccumulatedGCTime,
278 _recordGCEndTime, _countCollection, _cause);
279 }