annotate src/hotspot/share/services/memoryManager.cpp @ 49360:886acec3b4c6

8199275: Fix inclusions of allocation.inline.hpp Reviewed-by: coleenp, kbarrett, dholmes
author stefank
date Thu, 08 Mar 2018 09:56:29 +0100
parents cb5d2d4453d0
children 83aec1d357d4
rev   line source
duke@1 1 /*
stefank@49360 2 * Copyright (c) 2003, 2018, 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@49360 28 #include "memory/allocation.inline.hpp"
stefank@7397 29 #include "oops/oop.inline.hpp"
stefank@7397 30 #include "runtime/handles.inline.hpp"
stefank@7397 31 #include "runtime/javaCalls.hpp"
goetz@24351 32 #include "runtime/orderAccess.inline.hpp"
stefank@7397 33 #include "services/lowMemoryDetector.hpp"
stefank@7397 34 #include "services/management.hpp"
stefank@7397 35 #include "services/memoryManager.hpp"
stefank@7397 36 #include "services/memoryPool.hpp"
stefank@7397 37 #include "services/memoryService.hpp"
fparain@9623 38 #include "services/gcNotifier.hpp"
stefank@7397 39 #include "utilities/dtrace.hpp"
duke@1 40
rkennke@48168 41 MemoryManager::MemoryManager(const char* name) : _name(name) {
duke@1 42 _num_pools = 0;
lfoltan@24831 43 (void)const_cast<instanceOop&>(_memory_mgr_obj = instanceOop(NULL));
duke@1 44 }
duke@1 45
duke@1 46 void MemoryManager::add_pool(MemoryPool* pool) {
duke@1 47 assert(_num_pools < MemoryManager::max_num_pools, "_num_pools exceeds the max");
duke@1 48 if (_num_pools < MemoryManager::max_num_pools) {
duke@1 49 _pools[_num_pools] = pool;
duke@1 50 _num_pools++;
duke@1 51 }
duke@1 52 pool->add_manager(this);
duke@1 53 }
duke@1 54
duke@1 55 MemoryManager* MemoryManager::get_code_cache_memory_manager() {
rkennke@48168 56 return new MemoryManager("CodeCacheManager");
duke@1 57 }
duke@1 58
ehelin@18444 59 MemoryManager* MemoryManager::get_metaspace_memory_manager() {
rkennke@48168 60 return new MemoryManager("Metaspace Manager");
tonyp@4459 61 }
tonyp@4459 62
duke@1 63 instanceOop MemoryManager::get_memory_manager_instance(TRAPS) {
duke@1 64 // Must do an acquire so as to force ordering of subsequent
duke@1 65 // loads from anything _memory_mgr_obj points to or implies.
coleenp@47634 66 instanceOop mgr_obj = OrderAccess::load_acquire(&_memory_mgr_obj);
duke@1 67 if (mgr_obj == NULL) {
duke@1 68 // It's ok for more than one thread to execute the code up to the locked region.
duke@1 69 // Extra manager instances will just be gc'ed.
sjiang@30247 70 Klass* k = Management::sun_management_ManagementFactoryHelper_klass(CHECK_0);
duke@1 71
duke@1 72 Handle mgr_name = java_lang_String::create_from_str(name(), CHECK_0);
duke@1 73
duke@1 74 JavaValue result(T_OBJECT);
duke@1 75 JavaCallArguments args;
duke@1 76 args.push_oop(mgr_name); // Argument 1
duke@1 77
coleenp@8076 78 Symbol* method_name = NULL;
coleenp@8076 79 Symbol* signature = NULL;
duke@1 80 if (is_gc_memory_manager()) {
sjiang@30247 81 Klass* extKlass = Management::com_sun_management_internal_GarbageCollectorExtImpl_klass(CHECK_0);
sjiang@30247 82 // com.sun.management.GarbageCollectorMXBean is in jdk.management module which may not be present.
sjiang@30247 83 if (extKlass != NULL) {
sjiang@30247 84 k = extKlass;
sjiang@30247 85 }
sjiang@30247 86
coleenp@8076 87 method_name = vmSymbols::createGarbageCollector_name();
sjiang@30247 88
coleenp@8076 89 signature = vmSymbols::createGarbageCollector_signature();
duke@1 90 args.push_oop(Handle()); // Argument 2 (for future extension)
duke@1 91 } else {
coleenp@8076 92 method_name = vmSymbols::createMemoryManager_name();
coleenp@8076 93 signature = vmSymbols::createMemoryManager_signature();
duke@1 94 }
duke@1 95
coleenp@46329 96 InstanceKlass* ik = InstanceKlass::cast(k);
sjiang@30247 97
duke@1 98 JavaCalls::call_static(&result,
duke@1 99 ik,
duke@1 100 method_name,
duke@1 101 signature,
duke@1 102 &args,
duke@1 103 CHECK_0);
duke@1 104
duke@1 105 instanceOop m = (instanceOop) result.get_jobject();
duke@1 106 instanceHandle mgr(THREAD, m);
duke@1 107
duke@1 108 {
duke@1 109 // Get lock before setting _memory_mgr_obj
duke@1 110 // since another thread may have created the instance
duke@1 111 MutexLocker ml(Management_lock);
duke@1 112
duke@1 113 // Check if another thread has created the management object. We reload
duke@1 114 // _memory_mgr_obj here because some other thread may have initialized
duke@1 115 // it while we were executing the code before the lock.
duke@1 116 //
duke@1 117 // The lock has done an acquire, so the load can't float above it, but
duke@1 118 // we need to do a load_acquire as above.
coleenp@47634 119 mgr_obj = OrderAccess::load_acquire(&_memory_mgr_obj);
duke@1 120 if (mgr_obj != NULL) {
duke@1 121 return mgr_obj;
duke@1 122 }
duke@1 123
duke@1 124 // Get the address of the object we created via call_special.
duke@1 125 mgr_obj = mgr();
duke@1 126
duke@1 127 // Use store barrier to make sure the memory accesses associated
duke@1 128 // with creating the management object are visible before publishing
duke@1 129 // its address. The unlock will publish the store to _memory_mgr_obj
duke@1 130 // because it does a release first.
coleenp@47634 131 OrderAccess::release_store(&_memory_mgr_obj, mgr_obj);
duke@1 132 }
duke@1 133 }
duke@1 134
duke@1 135 return mgr_obj;
duke@1 136 }
duke@1 137
duke@1 138 void MemoryManager::oops_do(OopClosure* f) {
duke@1 139 f->do_oop((oop*) &_memory_mgr_obj);
duke@1 140 }
duke@1 141
duke@1 142 GCStatInfo::GCStatInfo(int num_pools) {
duke@1 143 // initialize the arrays for memory usage
zgu@13195 144 _before_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal);
zgu@13195 145 _after_gc_usage_array = (MemoryUsage*) NEW_C_HEAP_ARRAY(MemoryUsage, num_pools, mtInternal);
duke@1 146 _usage_array_size = num_pools;
johnc@11171 147 clear();
duke@1 148 }
duke@1 149
duke@1 150 GCStatInfo::~GCStatInfo() {
coleenp@27880 151 FREE_C_HEAP_ARRAY(MemoryUsage*, _before_gc_usage_array);
coleenp@27880 152 FREE_C_HEAP_ARRAY(MemoryUsage*, _after_gc_usage_array);
duke@1 153 }
duke@1 154
duke@1 155 void GCStatInfo::set_gc_usage(int pool_index, MemoryUsage usage, bool before_gc) {
duke@1 156 MemoryUsage* gc_usage_array;
duke@1 157 if (before_gc) {
duke@1 158 gc_usage_array = _before_gc_usage_array;
duke@1 159 } else {
duke@1 160 gc_usage_array = _after_gc_usage_array;
duke@1 161 }
duke@1 162 gc_usage_array[pool_index] = usage;
duke@1 163 }
duke@1 164
kevinw@6245 165 void GCStatInfo::clear() {
kevinw@6245 166 _index = 0;
kevinw@6245 167 _start_time = 0L;
kevinw@6245 168 _end_time = 0L;
kevinw@6245 169 size_t len = _usage_array_size * sizeof(MemoryUsage);
kevinw@6245 170 memset(_before_gc_usage_array, 0, len);
kevinw@6245 171 memset(_after_gc_usage_array, 0, len);
kevinw@6245 172 }
kevinw@6245 173
kevinw@6245 174
rkennke@48168 175 GCMemoryManager::GCMemoryManager(const char* name, const char* gc_end_message) :
rkennke@48168 176 MemoryManager(name), _gc_end_message(gc_end_message) {
duke@1 177 _num_collections = 0;
duke@1 178 _last_gc_stat = NULL;
coleenp@28163 179 _last_gc_lock = new Mutex(Mutex::leaf, "_last_gc_lock", true,
coleenp@28163 180 Monitor::_safepoint_check_never);
kevinw@6245 181 _current_gc_stat = NULL;
duke@1 182 _num_gc_threads = 1;
fparain@9623 183 _notification_enabled = false;
duke@1 184 }
duke@1 185
duke@1 186 GCMemoryManager::~GCMemoryManager() {
duke@1 187 delete _last_gc_stat;
kevinw@6245 188 delete _last_gc_lock;
kevinw@6245 189 delete _current_gc_stat;
duke@1 190 }
duke@1 191
duke@1 192 void GCMemoryManager::initialize_gc_stat_info() {
duke@1 193 assert(MemoryService::num_memory_pools() > 0, "should have one or more memory pools");
zgu@13195 194 _last_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
zgu@13195 195 _current_gc_stat = new(ResourceObj::C_HEAP, mtGC) GCStatInfo(MemoryService::num_memory_pools());
kevinw@6245 196 // tracking concurrent collections we need two objects: one to update, and one to
kevinw@6245 197 // hold the publicly available "last (completed) gc" information.
duke@1 198 }
duke@1 199
kevinw@6245 200 void GCMemoryManager::gc_begin(bool recordGCBeginTime, bool recordPreGCUsage,
kevinw@6245 201 bool recordAccumulatedGCTime) {
kevinw@6245 202 assert(_last_gc_stat != NULL && _current_gc_stat != NULL, "Just checking");
kevinw@6245 203 if (recordAccumulatedGCTime) {
kevinw@6245 204 _accumulated_timer.start();
kevinw@6245 205 }
kevinw@6245 206 // _num_collections now increases in gc_end, to count completed collections
kevinw@6245 207 if (recordGCBeginTime) {
kevinw@6245 208 _current_gc_stat->set_index(_num_collections+1);
kevinw@6245 209 _current_gc_stat->set_start_time(Management::timestamp());
kevinw@6245 210 }
duke@1 211
kevinw@6245 212 if (recordPreGCUsage) {
kevinw@6245 213 // Keep memory usage of all memory pools
kevinw@6245 214 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
kevinw@6245 215 MemoryPool* pool = MemoryService::get_memory_pool(i);
kevinw@6245 216 MemoryUsage usage = pool->get_memory_usage();
kevinw@6245 217 _current_gc_stat->set_before_gc_usage(i, usage);
dcubed@10739 218 HOTSPOT_MEM_POOL_GC_BEGIN(
dcubed@10739 219 (char *) name(), strlen(name()),
dcubed@10739 220 (char *) pool->name(), strlen(pool->name()),
dcubed@10739 221 usage.init_size(), usage.used(),
dcubed@10739 222 usage.committed(), usage.max_size());
kevinw@6245 223 }
duke@1 224 }
duke@1 225 }
duke@1 226
kevinw@6245 227 // A collector MUST, even if it does not complete for some reason,
kevinw@6245 228 // make a TraceMemoryManagerStats object where countCollection is true,
kevinw@6245 229 // to ensure the current gc stat is placed in _last_gc_stat.
kevinw@6245 230 void GCMemoryManager::gc_end(bool recordPostGCUsage,
kevinw@6245 231 bool recordAccumulatedGCTime,
fparain@9623 232 bool recordGCEndTime, bool countCollection,
fparain@9623 233 GCCause::Cause cause) {
kevinw@6245 234 if (recordAccumulatedGCTime) {
kevinw@6245 235 _accumulated_timer.stop();
kevinw@6245 236 }
kevinw@6245 237 if (recordGCEndTime) {
kevinw@6245 238 _current_gc_stat->set_end_time(Management::timestamp());
duke@1 239 }
duke@1 240
kevinw@6245 241 if (recordPostGCUsage) {
kevinw@6245 242 int i;
kevinw@6245 243 // keep the last gc statistics for all memory pools
kevinw@6245 244 for (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();
duke@1 247
dcubed@10739 248 HOTSPOT_MEM_POOL_GC_END(
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
kevinw@6245 254 _current_gc_stat->set_after_gc_usage(i, usage);
kevinw@6245 255 }
kevinw@6245 256
kevinw@6245 257 // Set last collection usage of the memory pools managed by this collector
kevinw@6245 258 for (i = 0; i < num_memory_pools(); i++) {
kevinw@6245 259 MemoryPool* pool = get_memory_pool(i);
kevinw@6245 260 MemoryUsage usage = pool->get_memory_usage();
kevinw@6245 261
kevinw@6245 262 // Compare with GC usage threshold
kevinw@6245 263 pool->set_last_collection_usage(usage);
kevinw@6245 264 LowMemoryDetector::detect_after_gc_memory(pool);
kevinw@6245 265 }
kevinw@6245 266 }
johnc@11171 267
kevinw@6245 268 if (countCollection) {
kevinw@6245 269 _num_collections++;
kevinw@6245 270 // alternately update two objects making one public when complete
kevinw@6245 271 {
kevinw@6245 272 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
kevinw@6245 273 GCStatInfo *tmp = _last_gc_stat;
kevinw@6245 274 _last_gc_stat = _current_gc_stat;
kevinw@6245 275 _current_gc_stat = tmp;
kevinw@6245 276 // reset the current stat for diagnosability purposes
kevinw@6245 277 _current_gc_stat->clear();
kevinw@6245 278 }
johnc@11171 279
johnc@11171 280 if (is_notification_enabled()) {
rkennke@48168 281 GCNotifier::pushNotification(this, _gc_end_message, GCCause::to_string(cause));
johnc@11171 282 }
duke@1 283 }
duke@1 284 }
kevinw@6245 285
kevinw@6245 286 size_t GCMemoryManager::get_last_gc_stat(GCStatInfo* dest) {
kevinw@6245 287 MutexLockerEx ml(_last_gc_lock, Mutex::_no_safepoint_check_flag);
kevinw@6245 288 if (_last_gc_stat->gc_index() != 0) {
kevinw@6245 289 dest->set_index(_last_gc_stat->gc_index());
kevinw@6245 290 dest->set_start_time(_last_gc_stat->start_time());
kevinw@6245 291 dest->set_end_time(_last_gc_stat->end_time());
kevinw@6245 292 assert(dest->usage_array_size() == _last_gc_stat->usage_array_size(),
kevinw@6245 293 "Must have same array size");
kevinw@6245 294 size_t len = dest->usage_array_size() * sizeof(MemoryUsage);
kevinw@6245 295 memcpy(dest->before_gc_usage_array(), _last_gc_stat->before_gc_usage_array(), len);
kevinw@6245 296 memcpy(dest->after_gc_usage_array(), _last_gc_stat->after_gc_usage_array(), len);
kevinw@6245 297 }
kevinw@6245 298 return _last_gc_stat->gc_index();
kevinw@6245 299 }