annotate hotspot/src/share/vm/services/memoryManager.cpp @ 46329:53ccc37bda19

8155672: Remove instanceKlassHandles and KlassHandles Summary: Summary: Use unhandled pointers for Klass and InstanceKlass, remove handles with no implementation. Reviewed-by: dholmes, lfoltan, vlivanov, sspitsyn
author coleenp
date Wed, 15 Mar 2017 10:25:37 -0400
parents 9925b07bba5b
children
rev   line source
duke@1 1 /*
coleenp@46329 2 * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
duke@1 7 * published by the Free Software Foundation.
duke@1 8 *
duke@1 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 13 * accompanied this code).
duke@1 14 *
duke@1 15 * You should have received a copy of the GNU General Public License version
duke@1 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 18 *
trims@5547 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@5547 20 * or visit www.oracle.com if you need additional information or have any
trims@5547 21 * questions.
duke@1 22 *
duke@1 23 */
duke@1 24
stefank@7397 25 #include "precompiled.hpp"
stefank@7397 26 #include "classfile/systemDictionary.hpp"
stefank@7397 27 #include "classfile/vmSymbols.hpp"
stefank@7397 28 #include "oops/oop.inline.hpp"
stefank@7397 29 #include "runtime/handles.inline.hpp"
stefank@7397 30 #include "runtime/javaCalls.hpp"
goetz@24351 31 #include "runtime/orderAccess.inline.hpp"
stefank@7397 32 #include "services/lowMemoryDetector.hpp"
stefank@7397 33 #include "services/management.hpp"
stefank@7397 34 #include "services/memoryManager.hpp"
stefank@7397 35 #include "services/memoryPool.hpp"
stefank@7397 36 #include "services/memoryService.hpp"
fparain@9623 37 #include "services/gcNotifier.hpp"
stefank@7397 38 #include "utilities/dtrace.hpp"
duke@1 39
duke@1 40 MemoryManager::MemoryManager() {
duke@1 41 _num_pools = 0;
lfoltan@24831 42 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
duke@1 43 }
duke@1 44
duke@1 45 void MemoryManager::add_pool(MemoryPool* pool) {
duke@1 46 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
duke@1 47 if (_num_pools < MemoryManager::max_num_pools) {
duke@1 48 _pools[_num_pools] = pool;
duke@1 49 _num_pools++;
duke@1 50 }
duke@1 51 pool->add_manager(this);
duke@1 52 }
duke@1 53
duke@1 54 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
duke@1 55 return (MemoryManager*) new CodeCacheMemoryManager();
duke@1 56 }
duke@1 57
ehelin@18444 58 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
ehelin@18444 59 return (MemoryManager*) new MetaspaceMemoryManager();
ehelin@18444 60 }
ehelin@18444 61
duke@1 62 GCMemoryManager* MemoryManager::get_copy_memory_manager() {
duke@1 63 return (GCMemoryManager*) new CopyMemoryManager();
duke@1 64 }
duke@1 65
duke@1 66 GCMemoryManager* MemoryManager::get_msc_memory_manager() {
duke@1 67 return (GCMemoryManager*) new MSCMemoryManager();
duke@1 68 }
duke@1 69
duke@1 70 GCMemoryManager* MemoryManager::get_parnew_memory_manager() {
duke@1 71 return (GCMemoryManager*) new ParNewMemoryManager();
duke@1 72 }
duke@1 73
duke@1 74 GCMemoryManager* MemoryManager::get_cms_memory_manager() {
duke@1 75 return (GCMemoryManager*) new CMSMemoryManager();
duke@1 76 }
duke@1 77
duke@1 78 GCMemoryManager* MemoryManager::get_psScavenge_memory_manager() {
duke@1 79 return (GCMemoryManager*) new PSScavengeMemoryManager();
duke@1 80 }
duke@1 81
duke@1 82 GCMemoryManager* MemoryManager::get_psMarkSweep_memory_manager() {
duke@1 83 return (GCMemoryManager*) new PSMarkSweepMemoryManager();
duke@1 84 }
duke@1 85
tonyp@4459 86 GCMemoryManager* MemoryManager::get_g1YoungGen_memory_manager() {
tonyp@4459 87 return (GCMemoryManager*) new G1YoungGenMemoryManager();
tonyp@4459 88 }
tonyp@4459 89
tonyp@4459 90 GCMemoryManager* MemoryManager::get_g1OldGen_memory_manager() {
tonyp@4459 91 return (GCMemoryManager*) new G1OldGenMemoryManager();
tonyp@4459 92 }
tonyp@4459 93
duke@1 94 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
duke@1 95 // Must do an acquire so as to force ordering of subsequent
duke@1 96 // loads from anything _memory_mgr_obj points to or implies.
duke@1 97 instanceOop mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
duke@1 98 if (mgr_obj == NULL) {
duke@1 99 // It's ok for more than one thread to execute the code up to the locked region.
duke@1 100 // Extra manager instances will just be gc'ed.
sjiang@30247 101 Klass* k = Management::sun_management_ManagementFactoryHelper_klass(CHECK_0);
duke@1 102
duke@1 103 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
duke@1 104
duke@1 105 JavaValue result(T_OBJECT);
duke@1 106 JavaCallArguments args;
duke@1 107 args.push_oop(mgr_name); // Argument 1
duke@1 108
coleenp@8076 109 Symbol* method_name = NULL;
coleenp@8076 110 Symbol* signature = NULL;
duke@1 111 if (is_gc_memory_manager()) {
sjiang@30247 112 Klass* extKlass = Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(CHECK_0);
sjiang@30247 113 // com.sun.management.GarbageCollectorMXBean is in jdk.management module which may not be present.
sjiang@30247 114 if (extKlass != NULL) {
sjiang@30247 115 k = extKlass;
sjiang@30247 116 }
sjiang@30247 117
coleenp@8076 118 method_name = vmSymbols::createGarbageCollector_name();
sjiang@30247 119
coleenp@8076 120 signature = vmSymbols::createGarbageCollector_signature();
duke@1 121 args.push_oop(Handle()); // Argument 2 (for future extension)
duke@1 122 } else {
coleenp@8076 123 method_name = vmSymbols::createMemoryManager_name();
coleenp@8076 124 signature = vmSymbols::createMemoryManager_signature();
duke@1 125 }
duke@1 126
coleenp@46329 127 InstanceKlass* ik = InstanceKlass::cast(k);
sjiang@30247 128
duke@1 129 JavaCalls::call_static(&result,
duke@1 130 ik,
duke@1 131 method_name,
duke@1 132 signature,
duke@1 133 &args,
duke@1 134 CHECK_0);
duke@1 135
duke@1 136 instanceOop m = (instanceOop) result.get_jobject();
duke@1 137 instanceHandle mgr(THREAD, m);
duke@1 138
duke@1 139 {
duke@1 140 // Get lock before setting _memory_mgr_obj
duke@1 141 // since another thread may have created the instance
duke@1 142 MutexLocker ml(Management_lock);
duke@1 143
duke@1 144 // Check if another thread has created the management object. We reload
duke@1 145 // _memory_mgr_obj here because some other thread may have initialized
duke@1 146 // it while we were executing the code before the lock.
duke@1 147 //
duke@1 148 // The lock has done an acquire, so the load can't float above it, but
duke@1 149 // we need to do a load_acquire as above.
duke@1 150 mgr_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_mgr_obj);
duke@1 151 if (mgr_obj != NULL) {
duke@1 152 return mgr_obj;
duke@1 153 }
duke@1 154
duke@1 155 // Get the address of the object we created via call_special.
duke@1 156 mgr_obj = mgr();
duke@1 157
duke@1 158 // Use store barrier to make sure the memory accesses associated
duke@1 159 // with creating the management object are visible before publishing
duke@1 160 // its address. The unlock will publish the store to _memory_mgr_obj
duke@1 161 // because it does a release first.
duke@1 162 OrderAccess::release_store_ptr(&_memory_mgr_obj, mgr_obj);
duke@1 163 }
duke@1 164 }
duke@1 165
duke@1 166 return mgr_obj;
duke@1 167 }
duke@1 168
duke@1 169 void MemoryManager::oops_do(OopClosure* f) {
duke@1 170 f->do_oop((oop*) &_memory_mgr_obj);
duke@1 171 }
duke@1 172
duke@1 173 GCStatInfo::GCStatInfo(int num_pools) {
duke@1 174 // initialize the arrays for memory usage
zgu@13195 175 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal);
zgu@13195 176 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal);
duke@1 177 _usage_array_size = num_pools;
johnc@11171 178 clear();
duke@1 179 }
duke@1 180
duke@1 181 GCStatInfo::~GCStatInfo() {
coleenp@27880 182 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array);
coleenp@27880 183 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array);
duke@1 184 }
duke@1 185
duke@1 186 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
duke@1 187 MemoryUsage* gc_usage_array;
duke@1 188 if (before_gc) {
duke@1 189 gc_usage_array = _before_gc_usage_array;
duke@1 190 } else {
duke@1 191 gc_usage_array = _after_gc_usage_array;
duke@1 192 }
duke@1 193 gc_usage_array[pool_index] = usage;
duke@1 194 }
duke@1 195
kevinw@6245 196 void GCStatInfo::clear() {
kevinw@6245 197 _index = 0;
kevinw@6245 198 _start_time = 0L;
kevinw@6245 199 _end_time = 0L;
kevinw@6245 200 size_t len = _usage_array_size * sizeof(MemoryUsage);
kevinw@6245 201 memset(_before_gc_usage_array, 0, len);
kevinw@6245 202 memset(_after_gc_usage_array, 0, len);
kevinw@6245 203 }
kevinw@6245 204
kevinw@6245 205
duke@1 206 GCMemoryManager::GCMemoryManager() : MemoryManager() {
duke@1 207 _num_collections = 0;
duke@1 208 _last_gc_stat = NULL;
coleenp@28163 209 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true,
coleenp@28163 210 Monitor::_safepoint_check_never);
kevinw@6245 211 _current_gc_stat = NULL;
duke@1 212 _num_gc_threads = 1;
fparain@9623 213 _notification_enabled = false;
duke@1 214 }
duke@1 215
duke@1 216 GCMemoryManager::~GCMemoryManager() {
duke@1 217 delete _last_gc_stat;
kevinw@6245 218 delete _last_gc_lock;
kevinw@6245 219 delete _current_gc_stat;
duke@1 220 }
duke@1 221
duke@1 222 void GCMemoryManager::initialize_gc_stat_info() {
duke@1 223 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
zgu@13195 224 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
zgu@13195 225 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
kevinw@6245 226 // tracking concurrent collections we need two objects: one to update, and one to
kevinw@6245 227 // hold the publicly available "last (completed) gc" information.
duke@1 228 }
duke@1 229
kevinw@6245 230 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
kevinw@6245 231 bool recordAccumulatedGCTime) {
kevinw@6245 232 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
kevinw@6245 233 if (recordAccumulatedGCTime) {
kevinw@6245 234 _accumulated_timer.start();
kevinw@6245 235 }
kevinw@6245 236 // _num_collections now increases in gc_end, to count completed collections
kevinw@6245 237 if (recordGCBeginTime) {
kevinw@6245 238 _current_gc_stat->set_index(_num_collections+1);
kevinw@6245 239 _current_gc_stat->set_start_time(Management::timestamp());
kevinw@6245 240 }
duke@1 241
kevinw@6245 242 if (recordPreGCUsage) {
kevinw@6245 243 // Keep memory usage of all memory pools
kevinw@6245 244 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
kevinw@6245 245 MemoryPool* pool = MemoryService::get_memory_pool(i);
kevinw@6245 246 MemoryUsage usage = pool->get_memory_usage();
kevinw@6245 247 _current_gc_stat->set_before_gc_usage(i, usage);
dcubed@10739 248 HOTSPOT_MEM_POOL_GC_BEGIN(
dcubed@10739 249 (char *) name(), strlen(name()),
dcubed@10739 250 (char *) pool->name(), strlen(pool->name()),
dcubed@10739 251 usage.init_size(), usage.used(),
dcubed@10739 252 usage.committed(), usage.max_size());
kevinw@6245 253 }
duke@1 254 }
duke@1 255 }
duke@1 256
kevinw@6245 257 // A collector MUST, even if it does not complete for some reason,
kevinw@6245 258 // make a TraceMemoryManagerStats object where countCollection is true,
kevinw@6245 259 // to ensure the current gc stat is placed in _last_gc_stat.
kevinw@6245 260 void GCMemoryManager::gc_end(bool recordPostGCUsage,
kevinw@6245 261 bool recordAccumulatedGCTime,
fparain@9623 262 bool recordGCEndTime, bool countCollection,
fparain@9623 263 GCCause::Cause cause) {
kevinw@6245 264 if (recordAccumulatedGCTime) {
kevinw@6245 265 _accumulated_timer.stop();
kevinw@6245 266 }
kevinw@6245 267 if (recordGCEndTime) {
kevinw@6245 268 _current_gc_stat->set_end_time(Management::timestamp());
duke@1 269 }
duke@1 270
kevinw@6245 271 if (recordPostGCUsage) {
kevinw@6245 272 int i;
kevinw@6245 273 // keep the last gc statistics for all memory pools
kevinw@6245 274 for (i = 0; i < MemoryService::num_memory_pools(); i++) {
kevinw@6245 275 MemoryPool* pool = MemoryService::get_memory_pool(i);
kevinw@6245 276 MemoryUsage usage = pool->get_memory_usage();
duke@1 277
dcubed@10739 278 HOTSPOT_MEM_POOL_GC_END(
dcubed@10739 279 (char *) name(), strlen(name()),
dcubed@10739 280 (char *) pool->name(), strlen(pool->name()),
dcubed@10739 281 usage.init_size(), usage.used(),
dcubed@10739 282 usage.committed(), usage.max_size());
kevinw@6245 283
kevinw@6245 284 _current_gc_stat->set_after_gc_usage(i, usage);
kevinw@6245 285 }
kevinw@6245 286
kevinw@6245 287 // Set last collection usage of the memory pools managed by this collector
kevinw@6245 288 for (i = 0; i < num_memory_pools(); i++) {
kevinw@6245 289 MemoryPool* pool = get_memory_pool(i);
kevinw@6245 290 MemoryUsage usage = pool->get_memory_usage();
kevinw@6245 291
kevinw@6245 292 // Compare with GC usage threshold
kevinw@6245 293 pool->set_last_collection_usage(usage);
kevinw@6245 294 LowMemoryDetector::detect_after_gc_memory(pool);
kevinw@6245 295 }
kevinw@6245 296 }
johnc@11171 297
kevinw@6245 298 if (countCollection) {
kevinw@6245 299 _num_collections++;
kevinw@6245 300 // alternately update two objects making one public when complete
kevinw@6245 301 {
kevinw@6245 302 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
kevinw@6245 303 GCStatInfo *tmp = _last_gc_stat;
kevinw@6245 304 _last_gc_stat = _current_gc_stat;
kevinw@6245 305 _current_gc_stat = tmp;
kevinw@6245 306 // reset the current stat for diagnosability purposes
kevinw@6245 307 _current_gc_stat->clear();
kevinw@6245 308 }
johnc@11171 309
johnc@11171 310 if (is_notification_enabled()) {
johnc@11171 311 bool isMajorGC = this == MemoryService::get_major_gc_manager();
johnc@11171 312 GCNotifier::pushNotification(this, isMajorGC ? "end of major GC" : "end of minor GC",
johnc@11171 313 GCCause::to_string(cause));
johnc@11171 314 }
duke@1 315 }
duke@1 316 }
kevinw@6245 317
kevinw@6245 318 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) {
kevinw@6245 319 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
kevinw@6245 320 if (_last_gc_stat->gc_index() != 0) {
kevinw@6245 321 dest->set_index(_last_gc_stat->gc_index());
kevinw@6245 322 dest->set_start_time(_last_gc_stat->start_time());
kevinw@6245 323 dest->set_end_time(_last_gc_stat->end_time());
kevinw@6245 324 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(),
kevinw@6245 325 "Must have same array size");
kevinw@6245 326 size_t len = dest->usage_array_size() * sizeof(MemoryUsage);
kevinw@6245 327 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len);
kevinw@6245 328 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len);
kevinw@6245 329 }
kevinw@6245 330 return _last_gc_stat->gc_index();
kevinw@6245 331 }