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0
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1 /*
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_memoryService.cpp.incl"
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27
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28 GrowableArray<MemoryPool*>* MemoryService::_pools_list =
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29 new (ResourceObj::C_HEAP) GrowableArray<MemoryPool*>(init_pools_list_size, true);
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30 GrowableArray<MemoryManager*>* MemoryService::_managers_list =
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31 new (ResourceObj::C_HEAP) GrowableArray<MemoryManager*>(init_managers_list_size, true);
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32
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33 GCMemoryManager* MemoryService::_minor_gc_manager = NULL;
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34 GCMemoryManager* MemoryService::_major_gc_manager = NULL;
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35 MemoryPool* MemoryService::_code_heap_pool = NULL;
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36
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37 class GcThreadCountClosure: public ThreadClosure {
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38 private:
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39 int _count;
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40 public:
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41 GcThreadCountClosure() : _count(0) {};
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42 void do_thread(Thread* thread);
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43 int count() { return _count; }
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44 };
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45
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46 void GcThreadCountClosure::do_thread(Thread* thread) {
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47 _count++;
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48 }
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49
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50 void MemoryService::set_universe_heap(CollectedHeap* heap) {
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51 CollectedHeap::Name kind = heap->kind();
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52 switch (kind) {
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53 case CollectedHeap::GenCollectedHeap : {
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54 add_gen_collected_heap_info(GenCollectedHeap::heap());
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55 break;
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56 }
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57 #ifndef SERIALGC
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58 case CollectedHeap::ParallelScavengeHeap : {
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59 add_parallel_scavenge_heap_info(ParallelScavengeHeap::heap());
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60 break;
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61 }
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62 #endif // SERIALGC
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63 default: {
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64 guarantee(false, "Not recognized kind of heap");
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65 }
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66 }
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67
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68 // set the GC thread count
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69 GcThreadCountClosure gctcc;
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70 heap->gc_threads_do(&gctcc);
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71 int count = gctcc.count();
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72 if (count > 0) {
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73 _minor_gc_manager->set_num_gc_threads(count);
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74 _major_gc_manager->set_num_gc_threads(count);
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75 }
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76
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77 // All memory pools and memory managers are initialized.
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78 //
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79 _minor_gc_manager->initialize_gc_stat_info();
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80 _major_gc_manager->initialize_gc_stat_info();
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81 }
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82
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83 // Add memory pools for GenCollectedHeap
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84 // This function currently only supports two generations collected heap.
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85 // The collector for GenCollectedHeap will have two memory managers.
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86 void MemoryService::add_gen_collected_heap_info(GenCollectedHeap* heap) {
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87 CollectorPolicy* policy = heap->collector_policy();
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88
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89 assert(policy->is_two_generation_policy(), "Only support two generations");
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90 guarantee(heap->n_gens() == 2, "Only support two-generation heap");
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91
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92 TwoGenerationCollectorPolicy* two_gen_policy = policy->as_two_generation_policy();
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93 if (two_gen_policy != NULL) {
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94 GenerationSpec** specs = two_gen_policy->generations();
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95 Generation::Name kind = specs[0]->name();
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96 switch (kind) {
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97 case Generation::DefNew:
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98 _minor_gc_manager = MemoryManager::get_copy_memory_manager();
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99 break;
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100 #ifndef SERIALGC
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101 case Generation::ParNew:
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102 case Generation::ASParNew:
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103 _minor_gc_manager = MemoryManager::get_parnew_memory_manager();
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104 break;
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105 #endif // SERIALGC
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106 default:
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107 guarantee(false, "Unrecognized generation spec");
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108 break;
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109 }
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110 if (policy->is_mark_sweep_policy()) {
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111 _major_gc_manager = MemoryManager::get_msc_memory_manager();
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112 #ifndef SERIALGC
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113 } else if (policy->is_concurrent_mark_sweep_policy()) {
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114 _major_gc_manager = MemoryManager::get_cms_memory_manager();
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115 #endif // SERIALGC
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116 } else {
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117 guarantee(false, "Unknown two-gen policy");
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118 }
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119 } else {
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120 guarantee(false, "Non two-gen policy");
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121 }
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122 _managers_list->append(_minor_gc_manager);
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123 _managers_list->append(_major_gc_manager);
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124
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125 add_generation_memory_pool(heap->get_gen(minor), _major_gc_manager, _minor_gc_manager);
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126 add_generation_memory_pool(heap->get_gen(major), _major_gc_manager);
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127
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128 PermGen::Name name = policy->permanent_generation()->name();
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129 switch (name) {
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130 case PermGen::MarkSweepCompact: {
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131 CompactingPermGenGen* perm_gen = (CompactingPermGenGen*) heap->perm_gen();
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132 add_compact_perm_gen_memory_pool(perm_gen, _major_gc_manager);
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133 break;
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134 }
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135 #ifndef SERIALGC
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136 case PermGen::ConcurrentMarkSweep: {
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137 CMSPermGenGen* cms_gen = (CMSPermGenGen*) heap->perm_gen();
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138 add_cms_perm_gen_memory_pool(cms_gen, _major_gc_manager);
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139 break;
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140 }
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141 #endif // SERIALGC
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142 default:
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143 guarantee(false, "Unrecognized perm generation");
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144 break;
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145 }
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146 }
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147
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148 #ifndef SERIALGC
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149 // Add memory pools for ParallelScavengeHeap
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150 // This function currently only supports two generations collected heap.
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151 // The collector for ParallelScavengeHeap will have two memory managers.
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152 void MemoryService::add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap) {
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153 // Two managers to keep statistics about _minor_gc_manager and _major_gc_manager GC.
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154 _minor_gc_manager = MemoryManager::get_psScavenge_memory_manager();
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155 _major_gc_manager = MemoryManager::get_psMarkSweep_memory_manager();
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156 _managers_list->append(_minor_gc_manager);
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157 _managers_list->append(_major_gc_manager);
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158
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159 add_psYoung_memory_pool(heap->young_gen(), _major_gc_manager, _minor_gc_manager);
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160 add_psOld_memory_pool(heap->old_gen(), _major_gc_manager);
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161 add_psPerm_memory_pool(heap->perm_gen(), _major_gc_manager);
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162 }
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163 #endif // SERIALGC
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164
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165 MemoryPool* MemoryService::add_gen(Generation* gen,
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166 const char* name,
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167 bool is_heap,
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168 bool support_usage_threshold) {
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169
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170 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
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171 GenerationPool* pool = new GenerationPool(gen, name, type, support_usage_threshold);
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172 _pools_list->append(pool);
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173 return (MemoryPool*) pool;
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174 }
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175
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176 MemoryPool* MemoryService::add_space(ContiguousSpace* space,
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177 const char* name,
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178 bool is_heap,
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179 size_t max_size,
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180 bool support_usage_threshold) {
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181 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
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182 ContiguousSpacePool* pool = new ContiguousSpacePool(space, name, type, max_size, support_usage_threshold);
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183
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184 _pools_list->append(pool);
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185 return (MemoryPool*) pool;
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186 }
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187
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188 MemoryPool* MemoryService::add_survivor_spaces(DefNewGeneration* gen,
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189 const char* name,
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190 bool is_heap,
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191 size_t max_size,
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192 bool support_usage_threshold) {
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193 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
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194 SurvivorContiguousSpacePool* pool = new SurvivorContiguousSpacePool(gen, name, type, max_size, support_usage_threshold);
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195
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196 _pools_list->append(pool);
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197 return (MemoryPool*) pool;
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198 }
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199
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200 #ifndef SERIALGC
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201 MemoryPool* MemoryService::add_cms_space(CompactibleFreeListSpace* space,
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202 const char* name,
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203 bool is_heap,
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204 size_t max_size,
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205 bool support_usage_threshold) {
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206 MemoryPool::PoolType type = (is_heap ? MemoryPool::Heap : MemoryPool::NonHeap);
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207 CompactibleFreeListSpacePool* pool = new CompactibleFreeListSpacePool(space, name, type, max_size, support_usage_threshold);
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208 _pools_list->append(pool);
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209 return (MemoryPool*) pool;
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210 }
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211 #endif // SERIALGC
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212
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213 // Add memory pool(s) for one generation
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214 void MemoryService::add_generation_memory_pool(Generation* gen,
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215 MemoryManager* major_mgr,
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216 MemoryManager* minor_mgr) {
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217 Generation::Name kind = gen->kind();
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218 int index = _pools_list->length();
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219
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220 switch (kind) {
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221 case Generation::DefNew: {
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222 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
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223 DefNewGeneration* young_gen = (DefNewGeneration*) gen;
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224 // Add a memory pool for each space and young gen doesn't
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225 // support low memory detection as it is expected to get filled up.
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226 MemoryPool* eden = add_space(young_gen->eden(),
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227 "Eden Space",
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228 true, /* is_heap */
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229 young_gen->max_eden_size(),
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230 false /* support_usage_threshold */);
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231 MemoryPool* survivor = add_survivor_spaces(young_gen,
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232 "Survivor Space",
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233 true, /* is_heap */
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234 young_gen->max_survivor_size(),
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235 false /* support_usage_threshold */);
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236 break;
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237 }
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238
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239 #ifndef SERIALGC
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240 case Generation::ParNew:
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241 case Generation::ASParNew:
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242 {
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243 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
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244 // Add a memory pool for each space and young gen doesn't
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245 // support low memory detection as it is expected to get filled up.
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246 ParNewGeneration* parnew_gen = (ParNewGeneration*) gen;
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247 MemoryPool* eden = add_space(parnew_gen->eden(),
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248 "Par Eden Space",
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249 true /* is_heap */,
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250 parnew_gen->max_eden_size(),
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251 false /* support_usage_threshold */);
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252 MemoryPool* survivor = add_survivor_spaces(parnew_gen,
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253 "Par Survivor Space",
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254 true, /* is_heap */
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255 parnew_gen->max_survivor_size(),
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256 false /* support_usage_threshold */);
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257
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258 break;
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259 }
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260 #endif // SERIALGC
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261
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262 case Generation::MarkSweepCompact: {
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263 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");
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264 add_gen(gen,
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265 "Tenured Gen",
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266 true, /* is_heap */
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267 true /* support_usage_threshold */);
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268 break;
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269 }
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270
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271 #ifndef SERIALGC
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272 case Generation::ConcurrentMarkSweep:
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273 case Generation::ASConcurrentMarkSweep:
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274 {
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275 assert(major_mgr != NULL && minor_mgr == NULL, "Should have only one manager");
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276 ConcurrentMarkSweepGeneration* cms = (ConcurrentMarkSweepGeneration*) gen;
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277 MemoryPool* pool = add_cms_space(cms->cmsSpace(),
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278 "CMS Old Gen",
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279 true, /* is_heap */
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280 cms->reserved().byte_size(),
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281 true /* support_usage_threshold */);
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282 break;
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283 }
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284 #endif // SERIALGC
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285
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286 default:
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287 assert(false, "should not reach here");
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288 // no memory pool added for others
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289 break;
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290 }
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291
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292 assert(major_mgr != NULL, "Should have at least one manager");
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293 // Link managers and the memory pools together
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294 for (int i = index; i < _pools_list->length(); i++) {
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295 MemoryPool* pool = _pools_list->at(i);
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296 major_mgr->add_pool(pool);
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297 if (minor_mgr != NULL) {
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298 minor_mgr->add_pool(pool);
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299 }
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300 }
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301 }
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302
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303 void MemoryService::add_compact_perm_gen_memory_pool(CompactingPermGenGen* perm_gen,
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304 MemoryManager* mgr) {
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305 PermanentGenerationSpec* spec = perm_gen->spec();
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306 size_t max_size = spec->max_size() - spec->read_only_size() - spec->read_write_size();
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307 MemoryPool* pool = add_space(perm_gen->unshared_space(),
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308 "Perm Gen",
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309 false, /* is_heap */
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310 max_size,
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311 true /* support_usage_threshold */);
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312 mgr->add_pool(pool);
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313 if (UseSharedSpaces) {
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314 pool = add_space(perm_gen->ro_space(),
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315 "Perm Gen [shared-ro]",
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316 false, /* is_heap */
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317 spec->read_only_size(),
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318 true /* support_usage_threshold */);
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319 mgr->add_pool(pool);
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320
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321 pool = add_space(perm_gen->rw_space(),
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322 "Perm Gen [shared-rw]",
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323 false, /* is_heap */
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324 spec->read_write_size(),
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325 true /* support_usage_threshold */);
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326 mgr->add_pool(pool);
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327 }
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328 }
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329
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330 #ifndef SERIALGC
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331 void MemoryService::add_cms_perm_gen_memory_pool(CMSPermGenGen* cms_gen,
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332 MemoryManager* mgr) {
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333
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334 MemoryPool* pool = add_cms_space(cms_gen->cmsSpace(),
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335 "CMS Perm Gen",
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336 false, /* is_heap */
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337 cms_gen->reserved().byte_size(),
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338 true /* support_usage_threshold */);
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339 mgr->add_pool(pool);
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340 }
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341
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342 void MemoryService::add_psYoung_memory_pool(PSYoungGen* gen, MemoryManager* major_mgr, MemoryManager* minor_mgr) {
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343 assert(major_mgr != NULL && minor_mgr != NULL, "Should have two managers");
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344
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345 // Add a memory pool for each space and young gen doesn't
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346 // support low memory detection as it is expected to get filled up.
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347 EdenMutableSpacePool* eden = new EdenMutableSpacePool(gen,
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348 gen->eden_space(),
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349 "PS Eden Space",
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350 MemoryPool::Heap,
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351 false /* support_usage_threshold */);
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352
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353 SurvivorMutableSpacePool* survivor = new SurvivorMutableSpacePool(gen,
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354 "PS Survivor Space",
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355 MemoryPool::Heap,
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356 false /* support_usage_threshold */);
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357
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358 major_mgr->add_pool(eden);
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359 major_mgr->add_pool(survivor);
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360 minor_mgr->add_pool(eden);
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361 minor_mgr->add_pool(survivor);
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362 _pools_list->append(eden);
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363 _pools_list->append(survivor);
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364 }
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365
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366 void MemoryService::add_psOld_memory_pool(PSOldGen* gen, MemoryManager* mgr) {
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367 PSGenerationPool* old_gen = new PSGenerationPool(gen,
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368 "PS Old Gen",
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369 MemoryPool::Heap,
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370 true /* support_usage_threshold */);
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371 mgr->add_pool(old_gen);
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372 _pools_list->append(old_gen);
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373 }
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374
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375 void MemoryService::add_psPerm_memory_pool(PSPermGen* gen, MemoryManager* mgr) {
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376 PSGenerationPool* perm_gen = new PSGenerationPool(gen,
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377 "PS Perm Gen",
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378 MemoryPool::NonHeap,
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379 true /* support_usage_threshold */);
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380 mgr->add_pool(perm_gen);
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381 _pools_list->append(perm_gen);
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382 }
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383 #endif // SERIALGC
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384
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385 void MemoryService::add_code_heap_memory_pool(CodeHeap* heap) {
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386 _code_heap_pool = new CodeHeapPool(heap,
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387 "Code Cache",
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388 true /* support_usage_threshold */);
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389 MemoryManager* mgr = MemoryManager::get_code_cache_memory_manager();
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390 mgr->add_pool(_code_heap_pool);
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391
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392 _pools_list->append(_code_heap_pool);
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393 _managers_list->append(mgr);
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394 }
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395
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396 MemoryManager* MemoryService::get_memory_manager(instanceHandle mh) {
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397 for (int i = 0; i < _managers_list->length(); i++) {
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398 MemoryManager* mgr = _managers_list->at(i);
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399 if (mgr->is_manager(mh)) {
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400 return mgr;
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401 }
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402 }
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403 return NULL;
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404 }
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405
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406 MemoryPool* MemoryService::get_memory_pool(instanceHandle ph) {
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407 for (int i = 0; i < _pools_list->length(); i++) {
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408 MemoryPool* pool = _pools_list->at(i);
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409 if (pool->is_pool(ph)) {
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410 return pool;
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411 }
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412 }
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413 return NULL;
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414 }
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415
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416 void MemoryService::track_memory_usage() {
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417 // Track the peak memory usage
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418 for (int i = 0; i < _pools_list->length(); i++) {
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419 MemoryPool* pool = _pools_list->at(i);
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420 pool->record_peak_memory_usage();
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421 }
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422
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423 // Detect low memory
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424 LowMemoryDetector::detect_low_memory();
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425 }
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426
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427 void MemoryService::track_memory_pool_usage(MemoryPool* pool) {
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428 // Track the peak memory usage
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429 pool->record_peak_memory_usage();
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430
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431 // Detect low memory
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432 if (LowMemoryDetector::is_enabled(pool)) {
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433 LowMemoryDetector::detect_low_memory(pool);
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434 }
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435 }
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436
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437 void MemoryService::gc_begin(bool fullGC) {
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438 GCMemoryManager* mgr;
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439 if (fullGC) {
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440 mgr = _major_gc_manager;
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441 } else {
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442 mgr = _minor_gc_manager;
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443 }
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444 assert(mgr->is_gc_memory_manager(), "Sanity check");
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445 mgr->gc_begin();
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446
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447 // Track the peak memory usage when GC begins
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448 for (int i = 0; i < _pools_list->length(); i++) {
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449 MemoryPool* pool = _pools_list->at(i);
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450 pool->record_peak_memory_usage();
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451 }
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452 }
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453
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454 void MemoryService::gc_end(bool fullGC) {
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455 GCMemoryManager* mgr;
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456 if (fullGC) {
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457 mgr = (GCMemoryManager*) _major_gc_manager;
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458 } else {
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459 mgr = (GCMemoryManager*) _minor_gc_manager;
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460 }
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461 assert(mgr->is_gc_memory_manager(), "Sanity check");
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462
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463 // register the GC end statistics and memory usage
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464 mgr->gc_end();
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465 }
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466
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467 void MemoryService::oops_do(OopClosure* f) {
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468 int i;
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469
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470 for (i = 0; i < _pools_list->length(); i++) {
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471 MemoryPool* pool = _pools_list->at(i);
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472 pool->oops_do(f);
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473 }
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474 for (i = 0; i < _managers_list->length(); i++) {
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475 MemoryManager* mgr = _managers_list->at(i);
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476 mgr->oops_do(f);
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477 }
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478 }
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479
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480 bool MemoryService::set_verbose(bool verbose) {
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481 MutexLocker m(Management_lock);
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482 // verbose will be set to the previous value
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483 bool succeed = CommandLineFlags::boolAtPut((char*)"PrintGC", &verbose, MANAGEMENT);
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484 assert(succeed, "Setting PrintGC flag fails");
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485 ClassLoadingService::reset_trace_class_unloading();
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486
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487 return verbose;
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488 }
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489
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|
|
490 Handle MemoryService::create_MemoryUsage_obj(MemoryUsage usage, TRAPS) {
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491 klassOop k = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
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|
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492 instanceKlassHandle ik(THREAD, k);
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493
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|
|
494 instanceHandle obj = ik->allocate_instance_handle(CHECK_NH);
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|
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495
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|
|
496 JavaValue result(T_VOID);
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|
|
497 JavaCallArguments args(10);
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|
|
498 args.push_oop(obj); // receiver
|
|
|
499 args.push_long(usage.init_size_as_jlong()); // Argument 1
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500 args.push_long(usage.used_as_jlong()); // Argument 2
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501 args.push_long(usage.committed_as_jlong()); // Argument 3
|
|
|
502 args.push_long(usage.max_size_as_jlong()); // Argument 4
|
|
|
503
|
|
|
504 JavaCalls::call_special(&result,
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|
|
505 ik,
|
|
|
506 vmSymbolHandles::object_initializer_name(),
|
|
|
507 vmSymbolHandles::long_long_long_long_void_signature(),
|
|
|
508 &args,
|
|
|
509 CHECK_NH);
|
|
|
510 return obj;
|
|
|
511 }
|
|
|
512 //
|
|
|
513 // GC manager type depends on the type of Generation. Depending the space
|
|
|
514 // availablity and vm option the gc uses major gc manager or minor gc
|
|
|
515 // manager or both. The type of gc manager depends on the generation kind.
|
|
|
516 // For DefNew, ParNew and ASParNew generation doing scavange gc uses minor
|
|
|
517 // gc manager (so _fullGC is set to false ) and for other generation kind
|
|
|
518 // DOing mark-sweep-compact uses major gc manager (so _fullGC is set
|
|
|
519 // to true).
|
|
|
520 TraceMemoryManagerStats::TraceMemoryManagerStats(Generation::Name kind) {
|
|
|
521 switch (kind) {
|
|
|
522 case Generation::DefNew:
|
|
|
523 #ifndef SERIALGC
|
|
|
524 case Generation::ParNew:
|
|
|
525 case Generation::ASParNew:
|
|
|
526 #endif // SERIALGC
|
|
|
527 _fullGC=false;
|
|
|
528 break;
|
|
|
529 case Generation::MarkSweepCompact:
|
|
|
530 #ifndef SERIALGC
|
|
|
531 case Generation::ConcurrentMarkSweep:
|
|
|
532 case Generation::ASConcurrentMarkSweep:
|
|
|
533 #endif // SERIALGC
|
|
|
534 _fullGC=true;
|
|
|
535 break;
|
|
|
536 default:
|
|
|
537 assert(false, "Unrecognized gc generation kind.");
|
|
|
538 }
|
|
|
539 MemoryService::gc_begin(_fullGC);
|
|
|
540 }
|
|
|
541 TraceMemoryManagerStats::TraceMemoryManagerStats(bool fullGC) {
|
|
|
542 _fullGC = fullGC;
|
|
|
543 MemoryService::gc_begin(_fullGC);
|
|
|
544 }
|
|
|
545
|
|
|
546 TraceMemoryManagerStats::~TraceMemoryManagerStats() {
|
|
|
547 MemoryService::gc_end(_fullGC);
|
|
|
548 }
|
