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 "gc/shared/generation.hpp"
30 #include "logging/logConfiguration.hpp"
31 #include "memory/heap.hpp"
32 #include "memory/memRegion.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/globals.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 GrowableArray<MemoryManager*> gc_mem_mgrs = heap->memory_managers();
72 _managers_list->appendAll(&gc_mem_mgrs);
73
74 GrowableArray<MemoryPool*> gc_mem_pools = heap->memory_pools();
75 _pools_list->appendAll(&gc_mem_pools);
76
77 // set the GC thread count
78 GcThreadCountClosure gctcc;
79 heap->gc_threads_do(&gctcc);
80 int count = gctcc.count();
81
82 int num_mgrs = gc_mem_mgrs.length();
83 for (int i = 0; i < num_mgrs; i++) {
84 assert(gc_mem_mgrs.at(i)->is_gc_memory_manager(), "expect GC memory manager");
85 GCMemoryManager* gc_mgr = (GCMemoryManager*) gc_mem_mgrs.at(i);
86 if (count > 0) {
87 gc_mgr->set_num_gc_threads(count);
88 }
89 // All memory pools and memory managers are initialized.
90 gc_mgr->initialize_gc_stat_info();
91 }
92 }
93
94 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap, const char* name) {
95 // Create new memory pool for this heap
96 MemoryPool* code_heap_pool = new CodeHeapPool(heap, name, true /* support_usage_threshold */);
97
98 // Append to lists
99 _code_heap_pools->append(code_heap_pool);
100 _pools_list->append(code_heap_pool);
101
102 if (_code_cache_manager == NULL) {
103 // Create CodeCache memory manager
104 _code_cache_manager = MemoryManager::get_code_cache_memory_manager();
105 _managers_list->append(_code_cache_manager);
106 }
107
108 _code_cache_manager->add_pool(code_heap_pool);
109 }
110
111 void MemoryService::add_metaspace_memory_pools() {
112 MemoryManager* mgr = MemoryManager::get_metaspace_memory_manager();
113
114 _metaspace_pool = new MetaspacePool();
115 mgr->add_pool(_metaspace_pool);
116 _pools_list->append(_metaspace_pool);
117
118 if (UseCompressedClassPointers) {
119 _compressed_class_pool = new CompressedKlassSpacePool();
120 mgr->add_pool(_compressed_class_pool);
121 _pools_list->append(_compressed_class_pool);
122 }
123
124 _managers_list->append(mgr);
125 }
126
127 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
128 for (int i = 0; i < _managers_list->length(); i++) {
129 MemoryManager* mgr = _managers_list->at(i);
130 if (mgr->is_manager(mh)) {
131 return mgr;
132 }
133 }
134 return NULL;
135 }
136
137 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
138 for (int i = 0; i < _pools_list->length(); i++) {
139 MemoryPool* pool = _pools_list->at(i);
140 if (pool->is_pool(ph)) {
141 return pool;
142 }
143 }
144 return NULL;
145 }
146
147 void MemoryService::track_memory_usage() {
148 // Track the peak memory usage
149 for (int i = 0; i < _pools_list->length(); i++) {
150 MemoryPool* pool = _pools_list->at(i);
151 pool->record_peak_memory_usage();
152 }
153
154 // Detect low memory
155 LowMemoryDetector::detect_low_memory();
156 }
157
158 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
159 // Track the peak memory usage
160 pool->record_peak_memory_usage();
161
162 // Detect low memory
163 if (LowMemoryDetector::is_enabled(pool)) {
164 LowMemoryDetector::detect_low_memory(pool);
165 }
166 }
167
168 void MemoryService::gc_begin(GCMemoryManager* mgr, bool recordGCBeginTime,
169 bool recordAccumulatedGCTime,
170 bool recordPreGCUsage, bool recordPeakUsage) {
171
172 assert(mgr->is_gc_memory_manager(), "Sanity check");
173 mgr->gc_begin(recordGCBeginTime, recordPreGCUsage, recordAccumulatedGCTime);
174
175 // Track the peak memory usage when GC begins
176 if (recordPeakUsage) {
177 for (int i = 0; i < _pools_list->length(); i++) {
178 MemoryPool* pool = _pools_list->at(i);
179 pool->record_peak_memory_usage();
180 }
181 }
182 }
183
184 void MemoryService::gc_end(GCMemoryManager* mgr, bool recordPostGCUsage,
185 bool recordAccumulatedGCTime,
186 bool recordGCEndTime, bool countCollection,
187 GCCause::Cause cause) {
188
189 assert(mgr->is_gc_memory_manager(), "Sanity check");
190
191 // register the GC end statistics and memory usage
192 mgr->gc_end(recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
193 countCollection, cause);
194 }
195
196 void MemoryService::oops_do(OopClosure* f) {
197 int i;
198
199 for (i = 0; i < _pools_list->length(); i++) {
200 MemoryPool* pool = _pools_list->at(i);
201 pool->oops_do(f);
202 }
203 for (i = 0; i < _managers_list->length(); i++) {
204 MemoryManager* mgr = _managers_list->at(i);
205 mgr->oops_do(f);
206 }
207 }
208
209 bool MemoryService::set_verbose(bool verbose) {
210 MutexLocker m(Management_lock);
211 // verbose will be set to the previous value
212 if (verbose) {
213 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
214 } else {
215 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
216 }
217 ClassLoadingService::reset_trace_class_unloading();
218
219 return verbose;
220 }
221
222 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
223 InstanceKlass* ik = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
224
225 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
226
227 JavaValue result(T_VOID);
228 JavaCallArguments args(10);
229 args.push_oop(obj); // receiver
230 args.push_long(usage.init_size_as_jlong()); // Argument 1
231 args.push_long(usage.used_as_jlong()); // Argument 2
232 args.push_long(usage.committed_as_jlong()); // Argument 3
233 args.push_long(usage.max_size_as_jlong()); // Argument 4
234
235 JavaCalls::call_special(&result,
236 ik,
237 vmSymbols::object_initializer_name(),
238 vmSymbols::long_long_long_long_void_signature(),
239 &args,
240 CHECK_NH);
241 return obj;
242 }
243
244 TraceMemoryManagerStats::TraceMemoryManagerStats(GCMemoryManager* gc_mem_mgr,
245 GCCause::Cause cause,
246 bool recordGCBeginTime,
247 bool recordPreGCUsage,
248 bool recordPeakUsage,
249 bool recordPostGCUsage,
250 bool recordAccumulatedGCTime,
251 bool recordGCEndTime,
252 bool countCollection) {
253 initialize(gc_mem_mgr, cause, recordGCBeginTime, recordPreGCUsage, recordPeakUsage,
254 recordPostGCUsage, recordAccumulatedGCTime, recordGCEndTime,
255 countCollection);
256 }
257
258 // for a subclass to create then initialize an instance before invoking
259 // the MemoryService
260 void TraceMemoryManagerStats::initialize(GCMemoryManager* gc_mem_mgr,
261 GCCause::Cause cause,
262 bool recordGCBeginTime,
263 bool recordPreGCUsage,
264 bool recordPeakUsage,
265 bool recordPostGCUsage,
266 bool recordAccumulatedGCTime,
267 bool recordGCEndTime,
268 bool countCollection) {
269 _gc_mem_mgr = gc_mem_mgr;
270 _recordGCBeginTime = recordGCBeginTime;
271 _recordPreGCUsage = recordPreGCUsage;
272 _recordPeakUsage = recordPeakUsage;
273 _recordPostGCUsage = recordPostGCUsage;
274 _recordAccumulatedGCTime = recordAccumulatedGCTime;
275 _recordGCEndTime = recordGCEndTime;
276 _countCollection = countCollection;
277 _cause = cause;
278
279 MemoryService::gc_begin(_gc_mem_mgr, _recordGCBeginTime, _recordAccumulatedGCTime,
280 _recordPreGCUsage, _recordPeakUsage);
281 }
282
283 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
284 MemoryService::gc_end(_gc_mem_mgr, _recordPostGCUsage, _recordAccumulatedGCTime,
285 _recordGCEndTime, _countCollection, _cause);
286 }