memoryPool.cpp revision 1472:c18cbe5936b8
1284345Ssjg/* 2284345Ssjg * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. 3284345Ssjg * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4284345Ssjg * 5284345Ssjg * This code is free software; you can redistribute it and/or modify it 6284345Ssjg * under the terms of the GNU General Public License version 2 only, as 7284345Ssjg * published by the Free Software Foundation. 8284345Ssjg * 9284345Ssjg * This code is distributed in the hope that it will be useful, but WITHOUT 10284345Ssjg * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11284345Ssjg * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12284345Ssjg * version 2 for more details (a copy is included in the LICENSE file that 13284345Ssjg * accompanied this code). 14284345Ssjg * 15284345Ssjg * You should have received a copy of the GNU General Public License version 16284345Ssjg * 2 along with this work; if not, write to the Free Software Foundation, 17284345Ssjg * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18284345Ssjg * 19284345Ssjg * 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 "incls/_precompiled.incl" 26# include "incls/_memoryPool.cpp.incl" 27 28MemoryPool::MemoryPool(const char* name, 29 PoolType type, 30 size_t init_size, 31 size_t max_size, 32 bool support_usage_threshold, 33 bool support_gc_threshold) { 34 _name = name; 35 _initial_size = init_size; 36 _max_size = max_size; 37 _memory_pool_obj = NULL; 38 _available_for_allocation = true; 39 _num_managers = 0; 40 _type = type; 41 42 // initialize the max and init size of collection usage 43 _after_gc_usage = MemoryUsage(_initial_size, 0, 0, _max_size); 44 45 _usage_sensor = NULL; 46 _gc_usage_sensor = NULL; 47 // usage threshold supports both high and low threshold 48 _usage_threshold = new ThresholdSupport(support_usage_threshold, support_usage_threshold); 49 // gc usage threshold supports only high threshold 50 _gc_usage_threshold = new ThresholdSupport(support_gc_threshold, support_gc_threshold); 51} 52 53void MemoryPool::add_manager(MemoryManager* mgr) { 54 assert(_num_managers < MemoryPool::max_num_managers, "_num_managers exceeds the max"); 55 if (_num_managers < MemoryPool::max_num_managers) { 56 _managers[_num_managers] = mgr; 57 _num_managers++; 58 } 59} 60 61 62// Returns an instanceHandle of a MemoryPool object. 63// It creates a MemoryPool instance when the first time 64// this function is called. 65instanceOop MemoryPool::get_memory_pool_instance(TRAPS) { 66 // Must do an acquire so as to force ordering of subsequent 67 // loads from anything _memory_pool_obj points to or implies. 68 instanceOop pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); 69 if (pool_obj == NULL) { 70 // It's ok for more than one thread to execute the code up to the locked region. 71 // Extra pool instances will just be gc'ed. 72 klassOop k = Management::sun_management_ManagementFactory_klass(CHECK_NULL); 73 instanceKlassHandle ik(THREAD, k); 74 75 Handle pool_name = java_lang_String::create_from_str(_name, CHECK_NULL); 76 jlong usage_threshold_value = (_usage_threshold->is_high_threshold_supported() ? 0 : -1L); 77 jlong gc_usage_threshold_value = (_gc_usage_threshold->is_high_threshold_supported() ? 0 : -1L); 78 79 JavaValue result(T_OBJECT); 80 JavaCallArguments args; 81 args.push_oop(pool_name); // Argument 1 82 args.push_int((int) is_heap()); // Argument 2 83 84 symbolHandle method_name = vmSymbolHandles::createMemoryPool_name(); 85 symbolHandle signature = vmSymbolHandles::createMemoryPool_signature(); 86 87 args.push_long(usage_threshold_value); // Argument 3 88 args.push_long(gc_usage_threshold_value); // Argument 4 89 90 JavaCalls::call_static(&result, 91 ik, 92 method_name, 93 signature, 94 &args, 95 CHECK_NULL); 96 97 instanceOop p = (instanceOop) result.get_jobject(); 98 instanceHandle pool(THREAD, p); 99 100 { 101 // Get lock since another thread may have create the instance 102 MutexLocker ml(Management_lock); 103 104 // Check if another thread has created the pool. We reload 105 // _memory_pool_obj here because some other thread may have 106 // initialized it while we were executing the code before the lock. 107 // 108 // The lock has done an acquire, so the load can't float above it, 109 // but we need to do a load_acquire as above. 110 pool_obj = (instanceOop)OrderAccess::load_ptr_acquire(&_memory_pool_obj); 111 if (pool_obj != NULL) { 112 return pool_obj; 113 } 114 115 // Get the address of the object we created via call_special. 116 pool_obj = pool(); 117 118 // Use store barrier to make sure the memory accesses associated 119 // with creating the pool are visible before publishing its address. 120 // The unlock will publish the store to _memory_pool_obj because 121 // it does a release first. 122 OrderAccess::release_store_ptr(&_memory_pool_obj, pool_obj); 123 } 124 } 125 126 return pool_obj; 127} 128 129inline static size_t get_max_value(size_t val1, size_t val2) { 130 return (val1 > val2 ? val1 : val2); 131} 132 133void MemoryPool::record_peak_memory_usage() { 134 // Caller in JDK is responsible for synchronization - 135 // acquire the lock for this memory pool before calling VM 136 MemoryUsage usage = get_memory_usage(); 137 size_t peak_used = get_max_value(usage.used(), _peak_usage.used()); 138 size_t peak_committed = get_max_value(usage.committed(), _peak_usage.committed()); 139 size_t peak_max_size = get_max_value(usage.max_size(), _peak_usage.max_size()); 140 141 _peak_usage = MemoryUsage(initial_size(), peak_used, peak_committed, peak_max_size); 142} 143 144static void set_sensor_obj_at(SensorInfo** sensor_ptr, instanceHandle sh) { 145 assert(*sensor_ptr == NULL, "Should be called only once"); 146 SensorInfo* sensor = new SensorInfo(); 147 sensor->set_sensor(sh()); 148 *sensor_ptr = sensor; 149} 150 151void MemoryPool::set_usage_sensor_obj(instanceHandle sh) { 152 set_sensor_obj_at(&_usage_sensor, sh); 153} 154 155void MemoryPool::set_gc_usage_sensor_obj(instanceHandle sh) { 156 set_sensor_obj_at(&_gc_usage_sensor, sh); 157} 158 159void MemoryPool::oops_do(OopClosure* f) { 160 f->do_oop((oop*) &_memory_pool_obj); 161 if (_usage_sensor != NULL) { 162 _usage_sensor->oops_do(f); 163 } 164 if (_gc_usage_sensor != NULL) { 165 _gc_usage_sensor->oops_do(f); 166 } 167} 168 169ContiguousSpacePool::ContiguousSpacePool(ContiguousSpace* space, 170 const char* name, 171 PoolType type, 172 size_t max_size, 173 bool support_usage_threshold) : 174 CollectedMemoryPool(name, type, space->capacity(), max_size, 175 support_usage_threshold), _space(space) { 176} 177 178MemoryUsage ContiguousSpacePool::get_memory_usage() { 179 size_t maxSize = (available_for_allocation() ? max_size() : 0); 180 size_t used = used_in_bytes(); 181 size_t committed = _space->capacity(); 182 183 return MemoryUsage(initial_size(), used, committed, maxSize); 184} 185 186SurvivorContiguousSpacePool::SurvivorContiguousSpacePool(DefNewGeneration* gen, 187 const char* name, 188 PoolType type, 189 size_t max_size, 190 bool support_usage_threshold) : 191 CollectedMemoryPool(name, type, gen->from()->capacity(), max_size, 192 support_usage_threshold), _gen(gen) { 193} 194 195MemoryUsage SurvivorContiguousSpacePool::get_memory_usage() { 196 size_t maxSize = (available_for_allocation() ? max_size() : 0); 197 size_t used = used_in_bytes(); 198 size_t committed = committed_in_bytes(); 199 200 return MemoryUsage(initial_size(), used, committed, maxSize); 201} 202 203#ifndef SERIALGC 204CompactibleFreeListSpacePool::CompactibleFreeListSpacePool(CompactibleFreeListSpace* space, 205 const char* name, 206 PoolType type, 207 size_t max_size, 208 bool support_usage_threshold) : 209 CollectedMemoryPool(name, type, space->capacity(), max_size, 210 support_usage_threshold), _space(space) { 211} 212 213MemoryUsage CompactibleFreeListSpacePool::get_memory_usage() { 214 size_t maxSize = (available_for_allocation() ? max_size() : 0); 215 size_t used = used_in_bytes(); 216 size_t committed = _space->capacity(); 217 218 return MemoryUsage(initial_size(), used, committed, maxSize); 219} 220#endif // SERIALGC 221 222GenerationPool::GenerationPool(Generation* gen, 223 const char* name, 224 PoolType type, 225 bool support_usage_threshold) : 226 CollectedMemoryPool(name, type, gen->capacity(), gen->max_capacity(), 227 support_usage_threshold), _gen(gen) { 228} 229 230MemoryUsage GenerationPool::get_memory_usage() { 231 size_t used = used_in_bytes(); 232 size_t committed = _gen->capacity(); 233 size_t maxSize = (available_for_allocation() ? max_size() : 0); 234 235 return MemoryUsage(initial_size(), used, committed, maxSize); 236} 237 238CodeHeapPool::CodeHeapPool(CodeHeap* codeHeap, const char* name, bool support_usage_threshold) : 239 MemoryPool(name, NonHeap, codeHeap->capacity(), codeHeap->max_capacity(), 240 support_usage_threshold, false), _codeHeap(codeHeap) { 241} 242 243MemoryUsage CodeHeapPool::get_memory_usage() { 244 size_t used = used_in_bytes(); 245 size_t committed = _codeHeap->capacity(); 246 size_t maxSize = (available_for_allocation() ? max_size() : 0); 247 248 return MemoryUsage(initial_size(), used, committed, maxSize); 249} 250