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 "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() {
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 (MemoryManager*) new CodeCacheMemoryManager();
56 }
57
58 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
59 return (MemoryManager*) new MetaspaceMemoryManager();
60 }
61
62 GCMemoryManager* MemoryManager::get_copy_memory_manager() {
63 return (GCMemoryManager*) new CopyMemoryManager();
64 }
65
66 GCMemoryManager* MemoryManager::get_msc_memory_manager() {
67 return (GCMemoryManager*) new MSCMemoryManager();
68 }
69
70 GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
71 return (GCMemoryManager*) new ParNewMemoryManager();
72 }
73
74 GCMemoryManager* MemoryManager::get_cms_memory_manager() {
75 return (GCMemoryManager*) new CMSMemoryManager();
76 }
77
78 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() {
79 return (GCMemoryManager*) new PSScavengeMemoryManager();
80 }
81
82 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() {
83 return (GCMemoryManager*) new PSMarkSweepMemoryManager();
84 }
85
86 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() {
87 return (GCMemoryManager*) new G1YoungGenMemoryManager();
88 }
89
90 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() {
91 return (GCMemoryManager*) new G1OldGenMemoryManager();
92 }
93
94 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
95 // Must do an acquire so as to force ordering of subsequent
96 // loads from anything _memory_mgr_obj points to or implies.
97 instanceOop mgr_obj = OrderAccess::load_acquire(&_memory_mgr_obj);
98 if (mgr_obj == NULL) {
99 // It's ok for more than one thread to execute the code up to the locked region.
100 // Extra manager instances will just be gc'ed.
101 Klass* k = Management::sun_management_ManagementFactoryHelper_klass(CHECK_0);
102
103 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
104
105 JavaValue result(T_OBJECT);
106 JavaCallArguments args;
107 args.push_oop(mgr_name); // Argument 1
108
109 Symbol* method_name = NULL;
110 Symbol* signature = NULL;
111 if (is_gc_memory_manager()) {
186 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
187 MemoryUsage* gc_usage_array;
188 if (before_gc) {
189 gc_usage_array = _before_gc_usage_array;
190 } else {
191 gc_usage_array = _after_gc_usage_array;
192 }
193 gc_usage_array[pool_index] = usage;
194 }
195
196 void GCStatInfo::clear() {
197 _index = 0;
198 _start_time = 0L;
199 _end_time = 0L;
200 size_t len = _usage_array_size * sizeof(MemoryUsage);
201 memset(_before_gc_usage_array, 0, len);
202 memset(_after_gc_usage_array, 0, len);
203 }
204
205
206 GCMemoryManager::GCMemoryManager() : MemoryManager() {
207 _num_collections = 0;
208 _last_gc_stat = NULL;
209 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true,
210 Monitor::_safepoint_check_never);
211 _current_gc_stat = NULL;
212 _num_gc_threads = 1;
213 _notification_enabled = false;
214 }
215
216 GCMemoryManager::~GCMemoryManager() {
217 delete _last_gc_stat;
218 delete _last_gc_lock;
219 delete _current_gc_stat;
220 }
221
222 void GCMemoryManager::initialize_gc_stat_info() {
223 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
224 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
225 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
226 // tracking concurrent collections we need two objects: one to update, and one to
291
292 // Compare with GC usage threshold
293 pool->set_last_collection_usage(usage);
294 LowMemoryDetector::detect_after_gc_memory(pool);
295 }
296 }
297
298 if (countCollection) {
299 _num_collections++;
300 // alternately update two objects making one public when complete
301 {
302 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
303 GCStatInfo *tmp = _last_gc_stat;
304 _last_gc_stat = _current_gc_stat;
305 _current_gc_stat = tmp;
306 // reset the current stat for diagnosability purposes
307 _current_gc_stat->clear();
308 }
309
310 if (is_notification_enabled()) {
311 bool isMajorGC = this == MemoryService::get_major_gc_manager();
312 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC",
313 GCCause::to_string(cause));
314 }
315 }
316 }
317
318 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) {
319 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
320 if (_last_gc_stat->gc_index() != 0) {
321 dest->set_index(_last_gc_stat->gc_index());
322 dest->set_start_time(_last_gc_stat->start_time());
323 dest->set_end_time(_last_gc_stat->end_time());
324 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(),
325 "Must have same array size");
326 size_t len = dest->usage_array_size() * sizeof(MemoryUsage);
327 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len);
328 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len);
329 }
330 return _last_gc_stat->gc_index();
331 }
|
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 "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);
72
73 JavaValue result(T_OBJECT);
74 JavaCallArguments args;
75 args.push_oop(mgr_name); // Argument 1
76
77 Symbol* method_name = NULL;
78 Symbol* signature = NULL;
79 if (is_gc_memory_manager()) {
154 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
155 MemoryUsage* gc_usage_array;
156 if (before_gc) {
157 gc_usage_array = _before_gc_usage_array;
158 } else {
159 gc_usage_array = _after_gc_usage_array;
160 }
161 gc_usage_array[pool_index] = usage;
162 }
163
164 void GCStatInfo::clear() {
165 _index = 0;
166 _start_time = 0L;
167 _end_time = 0L;
168 size_t len = _usage_array_size * sizeof(MemoryUsage);
169 memset(_before_gc_usage_array, 0, len);
170 memset(_after_gc_usage_array, 0, len);
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
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) {
286 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
287 if (_last_gc_stat->gc_index() != 0) {
288 dest->set_index(_last_gc_stat->gc_index());
289 dest->set_start_time(_last_gc_stat->start_time());
290 dest->set_end_time(_last_gc_stat->end_time());
291 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(),
292 "Must have same array size");
293 size_t len = dest->usage_array_size() * sizeof(MemoryUsage);
294 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len);
295 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len);
296 }
297 return _last_gc_stat->gc_index();
298 }
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