Mercurial > hg > truffle
annotate src/share/vm/memory/metaspace.cpp @ 12236:c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
Reviewed-by: brutisso, ehelin
author | stefank |
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date | Thu, 12 Sep 2013 10:15:54 +0200 |
parents | d6c266999345 |
children | 335b388c4b28 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 #include "precompiled.hpp" |
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25 #include "gc_interface/collectedHeap.hpp" |
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26 #include "memory/binaryTreeDictionary.hpp" |
6885 | 27 #include "memory/freeList.hpp" |
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28 #include "memory/collectorPolicy.hpp" |
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29 #include "memory/filemap.hpp" |
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30 #include "memory/freeList.hpp" |
6885 | 31 #include "memory/metablock.hpp" |
32 #include "memory/metachunk.hpp" | |
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33 #include "memory/metaspace.hpp" |
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34 #include "memory/metaspaceShared.hpp" |
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35 #include "memory/resourceArea.hpp" |
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36 #include "memory/universe.hpp" |
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37 #include "runtime/globals.hpp" |
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38 #include "runtime/java.hpp" |
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39 #include "runtime/mutex.hpp" |
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40 #include "runtime/orderAccess.hpp" |
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41 #include "services/memTracker.hpp" |
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42 #include "utilities/copy.hpp" |
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43 #include "utilities/debug.hpp" |
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44 |
6885 | 45 typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
46 typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; | |
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47 // Define this macro to enable slow integrity checking of |
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48 // the free chunk lists |
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49 const bool metaspace_slow_verify = false; |
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50 |
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51 // Parameters for stress mode testing |
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52 const uint metadata_deallocate_a_lot_block = 10; |
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53 const uint metadata_deallocate_a_lock_chunk = 3; |
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54 size_t const allocation_from_dictionary_limit = 4 * K; |
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55 |
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56 MetaWord* last_allocated = 0; |
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57 |
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58 size_t Metaspace::_class_metaspace_size; |
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59 |
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60 // Used in declarations in SpaceManager and ChunkManager |
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61 enum ChunkIndex { |
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62 ZeroIndex = 0, |
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63 SpecializedIndex = ZeroIndex, |
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64 SmallIndex = SpecializedIndex + 1, |
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65 MediumIndex = SmallIndex + 1, |
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66 HumongousIndex = MediumIndex + 1, |
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67 NumberOfFreeLists = 3, |
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68 NumberOfInUseLists = 4 |
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69 }; |
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70 |
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71 enum ChunkSizes { // in words. |
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72 ClassSpecializedChunk = 128, |
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73 SpecializedChunk = 128, |
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74 ClassSmallChunk = 256, |
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75 SmallChunk = 512, |
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76 ClassMediumChunk = 4 * K, |
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77 MediumChunk = 8 * K, |
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78 HumongousChunkGranularity = 8 |
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79 }; |
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80 |
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81 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 82 assert(i < NumberOfInUseLists, "Out of bound"); |
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83 return (ChunkIndex) (i+1); |
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84 } |
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85 |
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86 // Originally _capacity_until_GC was set to MetaspaceSize here but |
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87 // the default MetaspaceSize before argument processing was being |
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88 // used which was not the desired value. See the code |
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89 // in should_expand() to see how the initialization is handled |
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90 // now. |
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91 size_t MetaspaceGC::_capacity_until_GC = 0; |
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92 bool MetaspaceGC::_expand_after_GC = false; |
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93 uint MetaspaceGC::_shrink_factor = 0; |
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94 bool MetaspaceGC::_should_concurrent_collect = false; |
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95 |
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96 // Blocks of space for metadata are allocated out of Metachunks. |
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97 // |
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98 // Metachunk are allocated out of MetadataVirtualspaces and once |
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99 // allocated there is no explicit link between a Metachunk and |
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100 // the MetadataVirtualspaces from which it was allocated. |
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101 // |
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102 // Each SpaceManager maintains a |
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103 // list of the chunks it is using and the current chunk. The current |
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104 // chunk is the chunk from which allocations are done. Space freed in |
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105 // a chunk is placed on the free list of blocks (BlockFreelist) and |
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106 // reused from there. |
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107 |
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108 typedef class FreeList<Metachunk> ChunkList; |
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109 |
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110 // Manages the global free lists of chunks. |
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111 // Has three lists of free chunks, and a total size and |
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112 // count that includes all three |
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113 |
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114 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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115 |
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116 // Free list of chunks of different sizes. |
10175 | 117 // SpecializedChunk |
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118 // SmallChunk |
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119 // MediumChunk |
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120 // HumongousChunk |
6885 | 121 ChunkList _free_chunks[NumberOfFreeLists]; |
122 | |
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123 |
6885 | 124 // HumongousChunk |
125 ChunkTreeDictionary _humongous_dictionary; | |
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126 |
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127 // ChunkManager in all lists of this type |
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128 size_t _free_chunks_total; |
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129 size_t _free_chunks_count; |
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130 |
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131 void dec_free_chunks_total(size_t v) { |
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132 assert(_free_chunks_count > 0 && |
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133 _free_chunks_total > 0, |
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134 "About to go negative"); |
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135 Atomic::add_ptr(-1, &_free_chunks_count); |
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136 jlong minus_v = (jlong) - (jlong) v; |
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137 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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138 } |
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139 |
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140 // Debug support |
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141 |
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142 size_t sum_free_chunks(); |
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143 size_t sum_free_chunks_count(); |
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144 |
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145 void locked_verify_free_chunks_total(); |
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146 void slow_locked_verify_free_chunks_total() { |
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147 if (metaspace_slow_verify) { |
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148 locked_verify_free_chunks_total(); |
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149 } |
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150 } |
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151 void locked_verify_free_chunks_count(); |
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152 void slow_locked_verify_free_chunks_count() { |
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153 if (metaspace_slow_verify) { |
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154 locked_verify_free_chunks_count(); |
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155 } |
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156 } |
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157 void verify_free_chunks_count(); |
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158 |
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159 public: |
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160 |
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161 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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162 |
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163 // add or delete (return) a chunk to the global freelist. |
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164 Metachunk* chunk_freelist_allocate(size_t word_size); |
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165 void chunk_freelist_deallocate(Metachunk* chunk); |
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166 |
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167 // Map a size to a list index assuming that there are lists |
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168 // for special, small, medium, and humongous chunks. |
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169 static ChunkIndex list_index(size_t size); |
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170 |
10175 | 171 // Remove the chunk from its freelist. It is |
172 // expected to be on one of the _free_chunks[] lists. | |
173 void remove_chunk(Metachunk* chunk); | |
174 | |
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175 // Add the simple linked list of chunks to the freelist of chunks |
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176 // of type index. |
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177 void return_chunks(ChunkIndex index, Metachunk* chunks); |
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178 |
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179 // Total of the space in the free chunks list |
12235 | 180 size_t free_chunks_total_words(); |
181 size_t free_chunks_total_bytes(); | |
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182 |
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183 // Number of chunks in the free chunks list |
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184 size_t free_chunks_count(); |
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185 |
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186 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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187 Atomic::add_ptr(count, &_free_chunks_count); |
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188 Atomic::add_ptr(v, &_free_chunks_total); |
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189 } |
6885 | 190 ChunkTreeDictionary* humongous_dictionary() { |
191 return &_humongous_dictionary; | |
192 } | |
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193 |
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194 ChunkList* free_chunks(ChunkIndex index); |
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195 |
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196 // Returns the list for the given chunk word size. |
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197 ChunkList* find_free_chunks_list(size_t word_size); |
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198 |
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199 // Add and remove from a list by size. Selects |
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200 // list based on size of chunk. |
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201 void free_chunks_put(Metachunk* chuck); |
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202 Metachunk* free_chunks_get(size_t chunk_word_size); |
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203 |
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204 // Debug support |
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205 void verify(); |
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206 void slow_verify() { |
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207 if (metaspace_slow_verify) { |
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208 verify(); |
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209 } |
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210 } |
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211 void locked_verify(); |
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212 void slow_locked_verify() { |
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213 if (metaspace_slow_verify) { |
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214 locked_verify(); |
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215 } |
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216 } |
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217 void verify_free_chunks_total(); |
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218 |
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219 void locked_print_free_chunks(outputStream* st); |
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220 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 221 |
222 void print_on(outputStream* st); | |
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223 }; |
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224 |
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225 // Used to manage the free list of Metablocks (a block corresponds |
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226 // to the allocation of a quantum of metadata). |
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227 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 228 BlockTreeDictionary* _dictionary; |
229 static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); | |
230 | |
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231 // Only allocate and split from freelist if the size of the allocation |
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232 // is at least 1/4th the size of the available block. |
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233 const static int WasteMultiplier = 4; |
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234 |
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235 // Accessors |
6885 | 236 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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237 |
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238 public: |
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239 BlockFreelist(); |
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240 ~BlockFreelist(); |
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241 |
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242 // Get and return a block to the free list |
6885 | 243 MetaWord* get_block(size_t word_size); |
244 void return_block(MetaWord* p, size_t word_size); | |
245 | |
246 size_t total_size() { | |
247 if (dictionary() == NULL) { | |
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248 return 0; |
6885 | 249 } else { |
250 return dictionary()->total_size(); | |
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251 } |
6885 | 252 } |
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253 |
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254 void print_on(outputStream* st) const; |
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255 }; |
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256 |
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257 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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258 friend class VirtualSpaceList; |
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259 |
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260 // Link to next VirtualSpaceNode |
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261 VirtualSpaceNode* _next; |
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262 |
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263 // total in the VirtualSpace |
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264 MemRegion _reserved; |
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265 ReservedSpace _rs; |
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266 VirtualSpace _virtual_space; |
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267 MetaWord* _top; |
10175 | 268 // count of chunks contained in this VirtualSpace |
269 uintx _container_count; | |
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270 |
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271 // Convenience functions to access the _virtual_space |
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272 char* low() const { return virtual_space()->low(); } |
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273 char* high() const { return virtual_space()->high(); } |
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274 |
10175 | 275 // The first Metachunk will be allocated at the bottom of the |
276 // VirtualSpace | |
277 Metachunk* first_chunk() { return (Metachunk*) bottom(); } | |
278 | |
279 void inc_container_count(); | |
280 #ifdef ASSERT | |
281 uint container_count_slow(); | |
282 #endif | |
283 | |
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284 public: |
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285 |
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286 VirtualSpaceNode(size_t byte_size); |
10175 | 287 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
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288 ~VirtualSpaceNode(); |
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289 |
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290 // Convenience functions for logical bottom and end |
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291 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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292 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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293 |
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294 size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
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295 size_t expanded_words() const { return _virtual_space.committed_size() / BytesPerWord; } |
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296 size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
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297 |
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298 // address of next available space in _virtual_space; |
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299 // Accessors |
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300 VirtualSpaceNode* next() { return _next; } |
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301 void set_next(VirtualSpaceNode* v) { _next = v; } |
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302 |
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303 void set_reserved(MemRegion const v) { _reserved = v; } |
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304 void set_top(MetaWord* v) { _top = v; } |
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305 |
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306 // Accessors |
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307 MemRegion* reserved() { return &_reserved; } |
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308 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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309 |
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310 // Returns true if "word_size" is available in the VirtualSpace |
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311 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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312 |
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313 MetaWord* top() const { return _top; } |
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314 void inc_top(size_t word_size) { _top += word_size; } |
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315 |
10175 | 316 uintx container_count() { return _container_count; } |
317 void dec_container_count(); | |
318 #ifdef ASSERT | |
319 void verify_container_count(); | |
320 #endif | |
321 | |
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322 // used and capacity in this single entry in the list |
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323 size_t used_words_in_vs() const; |
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324 size_t capacity_words_in_vs() const; |
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325 size_t free_words_in_vs() const; |
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326 |
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327 bool initialize(); |
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328 |
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329 // get space from the virtual space |
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330 Metachunk* take_from_committed(size_t chunk_word_size); |
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331 |
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332 // Allocate a chunk from the virtual space and return it. |
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333 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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334 |
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335 // Expands/shrinks the committed space in a virtual space. Delegates |
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336 // to Virtualspace |
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337 bool expand_by(size_t words, bool pre_touch = false); |
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338 |
10175 | 339 // In preparation for deleting this node, remove all the chunks |
340 // in the node from any freelist. | |
341 void purge(ChunkManager* chunk_manager); | |
342 | |
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343 #ifdef ASSERT |
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344 // Debug support |
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345 void mangle(); |
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346 #endif |
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347 |
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348 void print_on(outputStream* st) const; |
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349 }; |
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350 |
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351 // byte_size is the size of the associated virtualspace. |
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352 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
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353 // align up to vm allocation granularity |
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354 byte_size = align_size_up(byte_size, os::vm_allocation_granularity()); |
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355 |
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356 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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357 // configurable address, generally at the top of the Java heap so other |
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358 // memory addresses don't conflict. |
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359 if (DumpSharedSpaces) { |
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360 char* shared_base = (char*)SharedBaseAddress; |
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361 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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362 if (_rs.is_reserved()) { |
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363 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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364 } else { |
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365 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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366 _rs = ReservedSpace(byte_size); |
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367 } |
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368 MetaspaceShared::set_shared_rs(&_rs); |
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369 } else { |
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370 _rs = ReservedSpace(byte_size); |
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371 } |
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372 |
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373 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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374 } |
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375 |
10175 | 376 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
377 Metachunk* chunk = first_chunk(); | |
378 Metachunk* invalid_chunk = (Metachunk*) top(); | |
379 while (chunk < invalid_chunk ) { | |
380 assert(chunk->is_free(), "Should be marked free"); | |
381 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
382 chunk_manager->remove_chunk(chunk); | |
383 assert(chunk->next() == NULL && | |
384 chunk->prev() == NULL, | |
385 "Was not removed from its list"); | |
386 chunk = (Metachunk*) next; | |
387 } | |
388 } | |
389 | |
390 #ifdef ASSERT | |
391 uint VirtualSpaceNode::container_count_slow() { | |
392 uint count = 0; | |
393 Metachunk* chunk = first_chunk(); | |
394 Metachunk* invalid_chunk = (Metachunk*) top(); | |
395 while (chunk < invalid_chunk ) { | |
396 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
397 // Don't count the chunks on the free lists. Those are | |
398 // still part of the VirtualSpaceNode but not currently | |
399 // counted. | |
400 if (!chunk->is_free()) { | |
401 count++; | |
402 } | |
403 chunk = (Metachunk*) next; | |
404 } | |
405 return count; | |
406 } | |
407 #endif | |
408 | |
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409 // List of VirtualSpaces for metadata allocation. |
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410 // It has a _next link for singly linked list and a MemRegion |
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411 // for total space in the VirtualSpace. |
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412 class VirtualSpaceList : public CHeapObj<mtClass> { |
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413 friend class VirtualSpaceNode; |
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414 |
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415 enum VirtualSpaceSizes { |
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416 VirtualSpaceSize = 256 * K |
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417 }; |
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418 |
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419 // Global list of virtual spaces |
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420 // Head of the list |
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421 VirtualSpaceNode* _virtual_space_list; |
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422 // virtual space currently being used for allocations |
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423 VirtualSpaceNode* _current_virtual_space; |
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424 // Free chunk list for all other metadata |
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425 ChunkManager _chunk_manager; |
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426 |
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427 // Can this virtual list allocate >1 spaces? Also, used to determine |
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428 // whether to allocate unlimited small chunks in this virtual space |
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429 bool _is_class; |
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430 bool can_grow() const { return !is_class() || !UseCompressedClassPointers; } |
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431 |
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432 // Sum of reserved and committed memory in the virtual spaces |
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433 size_t _reserved_words; |
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434 size_t _committed_words; |
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435 |
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436 // Number of virtual spaces |
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437 size_t _virtual_space_count; |
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438 |
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439 ~VirtualSpaceList(); |
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440 |
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441 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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442 |
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443 void set_virtual_space_list(VirtualSpaceNode* v) { |
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444 _virtual_space_list = v; |
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445 } |
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446 void set_current_virtual_space(VirtualSpaceNode* v) { |
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447 _current_virtual_space = v; |
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448 } |
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449 |
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450 void link_vs(VirtualSpaceNode* new_entry); |
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451 |
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452 // Get another virtual space and add it to the list. This |
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453 // is typically prompted by a failed attempt to allocate a chunk |
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454 // and is typically followed by the allocation of a chunk. |
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455 bool grow_vs(size_t vs_word_size); |
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456 |
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457 public: |
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458 VirtualSpaceList(size_t word_size); |
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459 VirtualSpaceList(ReservedSpace rs); |
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460 |
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461 size_t free_bytes(); |
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462 |
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463 Metachunk* get_new_chunk(size_t word_size, |
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464 size_t grow_chunks_by_words, |
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465 size_t medium_chunk_bunch); |
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466 |
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467 bool expand_by(VirtualSpaceNode* node, size_t word_size, bool pre_touch = false); |
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468 |
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469 // Get the first chunk for a Metaspace. Used for |
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470 // special cases such as the boot class loader, reflection |
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471 // class loader and anonymous class loader. |
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472 Metachunk* get_initialization_chunk(size_t word_size, size_t chunk_bunch); |
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473 |
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474 VirtualSpaceNode* current_virtual_space() { |
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475 return _current_virtual_space; |
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476 } |
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477 |
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478 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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479 bool is_class() const { return _is_class; } |
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480 |
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481 // Allocate the first virtualspace. |
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482 void initialize(size_t word_size); |
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483 |
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484 size_t reserved_words() { return _reserved_words; } |
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485 size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
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486 size_t committed_words() { return _committed_words; } |
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487 size_t committed_bytes() { return committed_words() * BytesPerWord; } |
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488 |
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489 void inc_reserved_words(size_t v); |
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490 void dec_reserved_words(size_t v); |
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491 void inc_committed_words(size_t v); |
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492 void dec_committed_words(size_t v); |
10175 | 493 void inc_virtual_space_count(); |
494 void dec_virtual_space_count(); | |
495 | |
496 // Unlink empty VirtualSpaceNodes and free it. | |
497 void purge(); | |
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498 |
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499 // Used and capacity in the entire list of virtual spaces. |
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500 // These are global values shared by all Metaspaces |
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501 size_t capacity_words_sum(); |
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502 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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503 size_t used_words_sum(); |
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504 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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505 |
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506 bool contains(const void *ptr); |
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507 |
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508 void print_on(outputStream* st) const; |
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509 |
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510 class VirtualSpaceListIterator : public StackObj { |
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511 VirtualSpaceNode* _virtual_spaces; |
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512 public: |
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513 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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514 _virtual_spaces(virtual_spaces) {} |
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515 |
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516 bool repeat() { |
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517 return _virtual_spaces != NULL; |
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518 } |
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519 |
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520 VirtualSpaceNode* get_next() { |
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521 VirtualSpaceNode* result = _virtual_spaces; |
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522 if (_virtual_spaces != NULL) { |
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523 _virtual_spaces = _virtual_spaces->next(); |
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524 } |
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525 return result; |
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526 } |
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527 }; |
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528 }; |
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529 |
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530 class Metadebug : AllStatic { |
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531 // Debugging support for Metaspaces |
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532 static int _deallocate_block_a_lot_count; |
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533 static int _deallocate_chunk_a_lot_count; |
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534 static int _allocation_fail_alot_count; |
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535 |
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536 public: |
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537 static int deallocate_block_a_lot_count() { |
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538 return _deallocate_block_a_lot_count; |
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539 } |
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540 static void set_deallocate_block_a_lot_count(int v) { |
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541 _deallocate_block_a_lot_count = v; |
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542 } |
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543 static void inc_deallocate_block_a_lot_count() { |
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544 _deallocate_block_a_lot_count++; |
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545 } |
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546 static int deallocate_chunk_a_lot_count() { |
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547 return _deallocate_chunk_a_lot_count; |
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548 } |
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549 static void reset_deallocate_chunk_a_lot_count() { |
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550 _deallocate_chunk_a_lot_count = 1; |
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551 } |
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552 static void inc_deallocate_chunk_a_lot_count() { |
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553 _deallocate_chunk_a_lot_count++; |
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554 } |
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555 |
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556 static void init_allocation_fail_alot_count(); |
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557 #ifdef ASSERT |
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558 static bool test_metadata_failure(); |
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559 #endif |
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560 |
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561 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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562 size_t chunk_word_size); |
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563 static void deallocate_block_a_lot(SpaceManager* sm, |
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564 size_t chunk_word_size); |
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565 |
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566 }; |
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567 |
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568 int Metadebug::_deallocate_block_a_lot_count = 0; |
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569 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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570 int Metadebug::_allocation_fail_alot_count = 0; |
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571 |
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572 // SpaceManager - used by Metaspace to handle allocations |
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573 class SpaceManager : public CHeapObj<mtClass> { |
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574 friend class Metaspace; |
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575 friend class Metadebug; |
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576 |
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577 private: |
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578 |
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579 // protects allocations and contains. |
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580 Mutex* const _lock; |
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581 |
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582 // Type of metadata allocated. |
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583 Metaspace::MetadataType _mdtype; |
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584 |
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585 // Chunk related size |
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586 size_t _medium_chunk_bunch; |
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587 |
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588 // List of chunks in use by this SpaceManager. Allocations |
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589 // are done from the current chunk. The list is used for deallocating |
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590 // chunks when the SpaceManager is freed. |
6885 | 591 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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592 Metachunk* _current_chunk; |
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593 |
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594 // Virtual space where allocation comes from. |
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595 VirtualSpaceList* _vs_list; |
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596 |
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597 // Number of small chunks to allocate to a manager |
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598 // If class space manager, small chunks are unlimited |
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599 static uint const _small_chunk_limit; |
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600 |
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601 // Sum of all space in allocated chunks |
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602 size_t _allocated_blocks_words; |
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603 |
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604 // Sum of all allocated chunks |
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605 size_t _allocated_chunks_words; |
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606 size_t _allocated_chunks_count; |
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607 |
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608 // Free lists of blocks are per SpaceManager since they |
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609 // are assumed to be in chunks in use by the SpaceManager |
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610 // and all chunks in use by a SpaceManager are freed when |
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611 // the class loader using the SpaceManager is collected. |
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612 BlockFreelist _block_freelists; |
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613 |
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614 // protects virtualspace and chunk expansions |
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615 static const char* _expand_lock_name; |
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616 static const int _expand_lock_rank; |
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617 static Mutex* const _expand_lock; |
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618 |
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619 private: |
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620 // Accessors |
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621 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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622 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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623 |
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624 BlockFreelist* block_freelists() const { |
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625 return (BlockFreelist*) &_block_freelists; |
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626 } |
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627 |
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628 Metaspace::MetadataType mdtype() { return _mdtype; } |
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629 VirtualSpaceList* vs_list() const { return _vs_list; } |
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630 |
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631 Metachunk* current_chunk() const { return _current_chunk; } |
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632 void set_current_chunk(Metachunk* v) { |
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633 _current_chunk = v; |
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634 } |
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635 |
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636 Metachunk* find_current_chunk(size_t word_size); |
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637 |
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638 // Add chunk to the list of chunks in use |
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639 void add_chunk(Metachunk* v, bool make_current); |
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640 void retire_current_chunk(); |
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641 |
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642 Mutex* lock() const { return _lock; } |
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643 |
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644 const char* chunk_size_name(ChunkIndex index) const; |
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645 |
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646 protected: |
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647 void initialize(); |
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648 |
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649 public: |
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650 SpaceManager(Metaspace::MetadataType mdtype, |
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651 Mutex* lock, |
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652 VirtualSpaceList* vs_list); |
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653 ~SpaceManager(); |
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654 |
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655 enum ChunkMultiples { |
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656 MediumChunkMultiple = 4 |
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657 }; |
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658 |
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659 // Accessors |
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660 size_t specialized_chunk_size() { return SpecializedChunk; } |
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661 size_t small_chunk_size() { return (size_t) vs_list()->is_class() ? ClassSmallChunk : SmallChunk; } |
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662 size_t medium_chunk_size() { return (size_t) vs_list()->is_class() ? ClassMediumChunk : MediumChunk; } |
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663 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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664 |
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665 size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
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666 size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
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667 size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
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668 size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
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669 |
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670 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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671 |
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672 static Mutex* expand_lock() { return _expand_lock; } |
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673 |
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674 // Increment the per Metaspace and global running sums for Metachunks |
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675 // by the given size. This is used when a Metachunk to added to |
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676 // the in-use list. |
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677 void inc_size_metrics(size_t words); |
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678 // Increment the per Metaspace and global running sums Metablocks by the given |
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679 // size. This is used when a Metablock is allocated. |
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680 void inc_used_metrics(size_t words); |
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681 // Delete the portion of the running sums for this SpaceManager. That is, |
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682 // the globals running sums for the Metachunks and Metablocks are |
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683 // decremented for all the Metachunks in-use by this SpaceManager. |
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684 void dec_total_from_size_metrics(); |
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685 |
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686 // Set the sizes for the initial chunks. |
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687 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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688 size_t* chunk_word_size, |
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689 size_t* class_chunk_word_size); |
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690 |
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691 size_t sum_capacity_in_chunks_in_use() const; |
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692 size_t sum_used_in_chunks_in_use() const; |
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693 size_t sum_free_in_chunks_in_use() const; |
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694 size_t sum_waste_in_chunks_in_use() const; |
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695 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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696 |
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697 size_t sum_count_in_chunks_in_use(); |
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698 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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699 |
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700 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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701 |
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702 // Block allocation and deallocation. |
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703 // Allocates a block from the current chunk |
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704 MetaWord* allocate(size_t word_size); |
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705 |
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706 // Helper for allocations |
6885 | 707 MetaWord* allocate_work(size_t word_size); |
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708 |
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709 // Returns a block to the per manager freelist |
6885 | 710 void deallocate(MetaWord* p, size_t word_size); |
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711 |
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712 // Based on the allocation size and a minimum chunk size, |
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713 // returned chunk size (for expanding space for chunk allocation). |
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714 size_t calc_chunk_size(size_t allocation_word_size); |
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715 |
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716 // Called when an allocation from the current chunk fails. |
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717 // Gets a new chunk (may require getting a new virtual space), |
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718 // and allocates from that chunk. |
6885 | 719 MetaWord* grow_and_allocate(size_t word_size); |
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720 |
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721 // debugging support. |
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722 |
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723 void dump(outputStream* const out) const; |
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724 void print_on(outputStream* st) const; |
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725 void locked_print_chunks_in_use_on(outputStream* st) const; |
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726 |
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727 void verify(); |
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728 void verify_chunk_size(Metachunk* chunk); |
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729 NOT_PRODUCT(void mangle_freed_chunks();) |
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730 #ifdef ASSERT |
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731 void verify_allocated_blocks_words(); |
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732 #endif |
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733 |
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734 size_t get_raw_word_size(size_t word_size) { |
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735 // If only the dictionary is going to be used (i.e., no |
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736 // indexed free list), then there is a minimum size requirement. |
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737 // MinChunkSize is a placeholder for the real minimum size JJJ |
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738 size_t byte_size = word_size * BytesPerWord; |
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739 |
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740 size_t byte_size_with_overhead = byte_size + Metablock::overhead(); |
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741 |
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742 size_t raw_bytes_size = MAX2(byte_size_with_overhead, |
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743 Metablock::min_block_byte_size()); |
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744 raw_bytes_size = ARENA_ALIGN(raw_bytes_size); |
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745 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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746 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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747 |
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748 return raw_word_size; |
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749 } |
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750 }; |
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751 |
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752 uint const SpaceManager::_small_chunk_limit = 4; |
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753 |
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754 const char* SpaceManager::_expand_lock_name = |
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755 "SpaceManager chunk allocation lock"; |
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756 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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757 Mutex* const SpaceManager::_expand_lock = |
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758 new Mutex(SpaceManager::_expand_lock_rank, |
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759 SpaceManager::_expand_lock_name, |
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760 Mutex::_allow_vm_block_flag); |
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761 |
10175 | 762 void VirtualSpaceNode::inc_container_count() { |
763 assert_lock_strong(SpaceManager::expand_lock()); | |
764 _container_count++; | |
765 assert(_container_count == container_count_slow(), | |
766 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
767 "container_count_slow() " SIZE_FORMAT, | |
768 _container_count, container_count_slow())); | |
769 } | |
770 | |
771 void VirtualSpaceNode::dec_container_count() { | |
772 assert_lock_strong(SpaceManager::expand_lock()); | |
773 _container_count--; | |
774 } | |
775 | |
776 #ifdef ASSERT | |
777 void VirtualSpaceNode::verify_container_count() { | |
778 assert(_container_count == container_count_slow(), | |
779 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
780 "container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); | |
781 } | |
782 #endif | |
783 | |
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784 // BlockFreelist methods |
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785 |
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786 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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787 |
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788 BlockFreelist::~BlockFreelist() { |
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789 if (_dictionary != NULL) { |
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790 if (Verbose && TraceMetadataChunkAllocation) { |
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791 _dictionary->print_free_lists(gclog_or_tty); |
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792 } |
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793 delete _dictionary; |
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794 } |
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795 } |
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796 |
6885 | 797 Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
798 Metablock* block = (Metablock*) p; | |
799 block->set_word_size(word_size); | |
800 block->set_prev(NULL); | |
801 block->set_next(NULL); | |
802 | |
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803 return block; |
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804 } |
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805 |
6885 | 806 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
807 Metablock* free_chunk = initialize_free_chunk(p, word_size); | |
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808 if (dictionary() == NULL) { |
6885 | 809 _dictionary = new BlockTreeDictionary(); |
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810 } |
6885 | 811 dictionary()->return_chunk(free_chunk); |
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812 } |
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813 |
6885 | 814 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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815 if (dictionary() == NULL) { |
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816 return NULL; |
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817 } |
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818 |
6885 | 819 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
820 // Dark matter. Too small for dictionary. | |
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821 return NULL; |
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822 } |
6885 | 823 |
824 Metablock* free_block = | |
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825 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
6885 | 826 if (free_block == NULL) { |
827 return NULL; | |
828 } | |
829 | |
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830 const size_t block_size = free_block->size(); |
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831 if (block_size > WasteMultiplier * word_size) { |
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832 return_block((MetaWord*)free_block, block_size); |
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833 return NULL; |
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834 } |
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835 |
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836 MetaWord* new_block = (MetaWord*)free_block; |
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837 assert(block_size >= word_size, "Incorrect size of block from freelist"); |
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838 const size_t unused = block_size - word_size; |
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839 if (unused >= TreeChunk<Metablock, FreeList>::min_size()) { |
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840 return_block(new_block + word_size, unused); |
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841 } |
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842 |
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843 return new_block; |
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844 } |
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845 |
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846 void BlockFreelist::print_on(outputStream* st) const { |
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847 if (dictionary() == NULL) { |
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848 return; |
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849 } |
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850 dictionary()->print_free_lists(st); |
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851 } |
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852 |
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853 // VirtualSpaceNode methods |
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854 |
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855 VirtualSpaceNode::~VirtualSpaceNode() { |
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856 _rs.release(); |
10175 | 857 #ifdef ASSERT |
858 size_t word_size = sizeof(*this) / BytesPerWord; | |
859 Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); | |
860 #endif | |
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861 } |
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862 |
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863 size_t VirtualSpaceNode::used_words_in_vs() const { |
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864 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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865 } |
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866 |
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867 // Space committed in the VirtualSpace |
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868 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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869 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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870 } |
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871 |
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872 size_t VirtualSpaceNode::free_words_in_vs() const { |
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873 return pointer_delta(end(), top(), sizeof(MetaWord)); |
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874 } |
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875 |
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876 // Allocates the chunk from the virtual space only. |
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877 // This interface is also used internally for debugging. Not all |
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878 // chunks removed here are necessarily used for allocation. |
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879 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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880 // Bottom of the new chunk |
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881 MetaWord* chunk_limit = top(); |
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882 assert(chunk_limit != NULL, "Not safe to call this method"); |
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883 |
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884 if (!is_available(chunk_word_size)) { |
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885 if (TraceMetadataChunkAllocation) { |
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886 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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887 // Dump some information about the virtual space that is nearly full |
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888 print_on(tty); |
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889 } |
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890 return NULL; |
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891 } |
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892 |
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893 // Take the space (bump top on the current virtual space). |
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894 inc_top(chunk_word_size); |
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895 |
10175 | 896 // Initialize the chunk |
897 Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); | |
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898 return result; |
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899 } |
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900 |
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901 |
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902 // Expand the virtual space (commit more of the reserved space) |
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903 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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904 size_t bytes = words * BytesPerWord; |
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905 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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906 if (TraceMetavirtualspaceAllocation && !result) { |
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907 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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908 "for byte size " SIZE_FORMAT, bytes); |
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909 virtual_space()->print(); |
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910 } |
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911 return result; |
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912 } |
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913 |
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914 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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915 assert_lock_strong(SpaceManager::expand_lock()); |
10175 | 916 Metachunk* result = take_from_committed(chunk_word_size); |
917 if (result != NULL) { | |
918 inc_container_count(); | |
919 } | |
920 return result; | |
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921 } |
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922 |
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923 bool VirtualSpaceNode::initialize() { |
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924 |
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925 if (!_rs.is_reserved()) { |
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926 return false; |
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927 } |
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928 |
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929 // An allocation out of this Virtualspace that is larger |
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930 // than an initial commit size can waste that initial committed |
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931 // space. |
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932 size_t committed_byte_size = 0; |
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933 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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934 if (result) { |
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935 set_top((MetaWord*)virtual_space()->low()); |
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936 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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937 (HeapWord*)(_rs.base() + _rs.size()))); |
6726
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938 |
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939 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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940 err_msg("Reserved start was not set properly " PTR_FORMAT |
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941 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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942 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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943 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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944 " != " SIZE_FORMAT, reserved()->word_size(), |
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945 _rs.size() / BytesPerWord)); |
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946 } |
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947 |
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948 return result; |
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949 } |
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950 |
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951 void VirtualSpaceNode::print_on(outputStream* st) const { |
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952 size_t used = used_words_in_vs(); |
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953 size_t capacity = capacity_words_in_vs(); |
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954 VirtualSpace* vs = virtual_space(); |
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955 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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956 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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957 PTR_FORMAT ", " PTR_FORMAT ")", |
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958 vs, capacity / K, |
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959 capacity == 0 ? 0 : used * 100 / capacity, |
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960 bottom(), top(), end(), |
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961 vs->high_boundary()); |
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962 } |
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963 |
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964 #ifdef ASSERT |
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965 void VirtualSpaceNode::mangle() { |
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966 size_t word_size = capacity_words_in_vs(); |
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967 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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968 } |
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969 #endif // ASSERT |
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970 |
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971 // VirtualSpaceList methods |
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972 // Space allocated from the VirtualSpace |
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973 |
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974 VirtualSpaceList::~VirtualSpaceList() { |
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975 VirtualSpaceListIterator iter(virtual_space_list()); |
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976 while (iter.repeat()) { |
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977 VirtualSpaceNode* vsl = iter.get_next(); |
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978 delete vsl; |
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979 } |
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980 } |
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981 |
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982 void VirtualSpaceList::inc_reserved_words(size_t v) { |
10175 | 983 assert_lock_strong(SpaceManager::expand_lock()); |
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984 _reserved_words = _reserved_words + v; |
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985 } |
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986 void VirtualSpaceList::dec_reserved_words(size_t v) { |
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987 assert_lock_strong(SpaceManager::expand_lock()); |
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988 _reserved_words = _reserved_words - v; |
10175 | 989 } |
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990 |
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991 void VirtualSpaceList::inc_committed_words(size_t v) { |
10175 | 992 assert_lock_strong(SpaceManager::expand_lock()); |
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993 _committed_words = _committed_words + v; |
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994 } |
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995 void VirtualSpaceList::dec_committed_words(size_t v) { |
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996 assert_lock_strong(SpaceManager::expand_lock()); |
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997 _committed_words = _committed_words - v; |
10175 | 998 } |
999 | |
1000 void VirtualSpaceList::inc_virtual_space_count() { | |
1001 assert_lock_strong(SpaceManager::expand_lock()); | |
1002 _virtual_space_count++; | |
1003 } | |
1004 void VirtualSpaceList::dec_virtual_space_count() { | |
1005 assert_lock_strong(SpaceManager::expand_lock()); | |
1006 _virtual_space_count--; | |
1007 } | |
1008 | |
1009 void ChunkManager::remove_chunk(Metachunk* chunk) { | |
1010 size_t word_size = chunk->word_size(); | |
1011 ChunkIndex index = list_index(word_size); | |
1012 if (index != HumongousIndex) { | |
1013 free_chunks(index)->remove_chunk(chunk); | |
1014 } else { | |
1015 humongous_dictionary()->remove_chunk(chunk); | |
1016 } | |
1017 | |
1018 // Chunk is being removed from the chunks free list. | |
1019 dec_free_chunks_total(chunk->capacity_word_size()); | |
1020 } | |
1021 | |
1022 // Walk the list of VirtualSpaceNodes and delete | |
1023 // nodes with a 0 container_count. Remove Metachunks in | |
1024 // the node from their respective freelists. | |
1025 void VirtualSpaceList::purge() { | |
1026 assert_lock_strong(SpaceManager::expand_lock()); | |
1027 // Don't use a VirtualSpaceListIterator because this | |
1028 // list is being changed and a straightforward use of an iterator is not safe. | |
1029 VirtualSpaceNode* purged_vsl = NULL; | |
1030 VirtualSpaceNode* prev_vsl = virtual_space_list(); | |
1031 VirtualSpaceNode* next_vsl = prev_vsl; | |
1032 while (next_vsl != NULL) { | |
1033 VirtualSpaceNode* vsl = next_vsl; | |
1034 next_vsl = vsl->next(); | |
1035 // Don't free the current virtual space since it will likely | |
1036 // be needed soon. | |
1037 if (vsl->container_count() == 0 && vsl != current_virtual_space()) { | |
1038 // Unlink it from the list | |
1039 if (prev_vsl == vsl) { | |
1040 // This is the case of the current note being the first note. | |
1041 assert(vsl == virtual_space_list(), "Expected to be the first note"); | |
1042 set_virtual_space_list(vsl->next()); | |
1043 } else { | |
1044 prev_vsl->set_next(vsl->next()); | |
1045 } | |
1046 | |
1047 vsl->purge(chunk_manager()); | |
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1048 dec_reserved_words(vsl->reserved_words()); |
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1049 dec_committed_words(vsl->committed_words()); |
10175 | 1050 dec_virtual_space_count(); |
1051 purged_vsl = vsl; | |
1052 delete vsl; | |
1053 } else { | |
1054 prev_vsl = vsl; | |
1055 } | |
1056 } | |
1057 #ifdef ASSERT | |
1058 if (purged_vsl != NULL) { | |
1059 // List should be stable enough to use an iterator here. | |
1060 VirtualSpaceListIterator iter(virtual_space_list()); | |
1061 while (iter.repeat()) { | |
1062 VirtualSpaceNode* vsl = iter.get_next(); | |
1063 assert(vsl != purged_vsl, "Purge of vsl failed"); | |
1064 } | |
1065 } | |
1066 #endif | |
1067 } | |
1068 | |
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1069 size_t VirtualSpaceList::used_words_sum() { |
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1070 size_t allocated_by_vs = 0; |
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1071 VirtualSpaceListIterator iter(virtual_space_list()); |
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1072 while (iter.repeat()) { |
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1073 VirtualSpaceNode* vsl = iter.get_next(); |
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1074 // Sum used region [bottom, top) in each virtualspace |
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1075 allocated_by_vs += vsl->used_words_in_vs(); |
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1076 } |
12235 | 1077 assert(allocated_by_vs >= chunk_manager()->free_chunks_total_words(), |
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1078 err_msg("Total in free chunks " SIZE_FORMAT |
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1079 " greater than total from virtual_spaces " SIZE_FORMAT, |
12235 | 1080 allocated_by_vs, chunk_manager()->free_chunks_total_words())); |
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1081 size_t used = |
12235 | 1082 allocated_by_vs - chunk_manager()->free_chunks_total_words(); |
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1083 return used; |
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1084 } |
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1085 |
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1086 // Space available in all MetadataVirtualspaces allocated |
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1087 // for metadata. This is the upper limit on the capacity |
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1088 // of chunks allocated out of all the MetadataVirtualspaces. |
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1089 size_t VirtualSpaceList::capacity_words_sum() { |
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1090 size_t capacity = 0; |
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1091 VirtualSpaceListIterator iter(virtual_space_list()); |
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1092 while (iter.repeat()) { |
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1093 VirtualSpaceNode* vsl = iter.get_next(); |
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1094 capacity += vsl->capacity_words_in_vs(); |
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1095 } |
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1096 return capacity; |
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1097 } |
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1098 |
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1099 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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1100 _is_class(false), |
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1101 _virtual_space_list(NULL), |
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1102 _current_virtual_space(NULL), |
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1103 _reserved_words(0), |
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1104 _committed_words(0), |
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1105 _virtual_space_count(0) { |
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1106 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1107 Mutex::_no_safepoint_check_flag); |
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1108 bool initialization_succeeded = grow_vs(word_size); |
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1109 |
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1110 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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1111 _chunk_manager.free_chunks(SmallIndex)->set_size(SmallChunk); |
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1112 _chunk_manager.free_chunks(MediumIndex)->set_size(MediumChunk); |
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1113 assert(initialization_succeeded, |
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1114 " VirtualSpaceList initialization should not fail"); |
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1115 } |
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1116 |
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1117 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1118 _is_class(true), |
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1119 _virtual_space_list(NULL), |
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1120 _current_virtual_space(NULL), |
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1121 _reserved_words(0), |
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1122 _committed_words(0), |
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1123 _virtual_space_count(0) { |
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1124 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1125 Mutex::_no_safepoint_check_flag); |
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1126 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1127 bool succeeded = class_entry->initialize(); |
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1128 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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1129 _chunk_manager.free_chunks(SmallIndex)->set_size(ClassSmallChunk); |
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1130 _chunk_manager.free_chunks(MediumIndex)->set_size(ClassMediumChunk); |
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1131 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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1132 link_vs(class_entry); |
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1133 } |
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1134 |
10183
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1135 size_t VirtualSpaceList::free_bytes() { |
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1136 return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
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1137 } |
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1138 |
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1139 // Allocate another meta virtual space and add it to the list. |
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1140 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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1141 assert_lock_strong(SpaceManager::expand_lock()); |
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1142 if (vs_word_size == 0) { |
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1143 return false; |
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1144 } |
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1145 // Reserve the space |
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1146 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1147 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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1148 |
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1149 // Allocate the meta virtual space and initialize it. |
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1150 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1151 if (!new_entry->initialize()) { |
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1152 delete new_entry; |
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1153 return false; |
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1154 } else { |
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1155 assert(new_entry->reserved_words() == vs_word_size, "Must be"); |
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1156 // ensure lock-free iteration sees fully initialized node |
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1157 OrderAccess::storestore(); |
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1158 link_vs(new_entry); |
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1159 return true; |
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1160 } |
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1161 } |
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1162 |
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1163 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
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1164 if (virtual_space_list() == NULL) { |
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1165 set_virtual_space_list(new_entry); |
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1166 } else { |
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1167 current_virtual_space()->set_next(new_entry); |
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1168 } |
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1169 set_current_virtual_space(new_entry); |
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1170 inc_reserved_words(new_entry->reserved_words()); |
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1171 inc_committed_words(new_entry->committed_words()); |
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1172 inc_virtual_space_count(); |
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1173 #ifdef ASSERT |
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1174 new_entry->mangle(); |
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1175 #endif |
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1176 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1177 VirtualSpaceNode* vsl = current_virtual_space(); |
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1178 vsl->print_on(tty); |
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1179 } |
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1180 } |
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1181 |
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1182 bool VirtualSpaceList::expand_by(VirtualSpaceNode* node, size_t word_size, bool pre_touch) { |
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1183 size_t before = node->committed_words(); |
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1184 |
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1185 bool result = node->expand_by(word_size, pre_touch); |
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1186 |
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1187 size_t after = node->committed_words(); |
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1188 |
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1189 // after and before can be the same if the memory was pre-committed. |
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1190 assert(after >= before, "Must be"); |
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1191 inc_committed_words(after - before); |
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1192 |
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1193 return result; |
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1194 } |
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1195 |
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1196 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1197 size_t grow_chunks_by_words, |
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1198 size_t medium_chunk_bunch) { |
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1199 |
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1200 // Get a chunk from the chunk freelist |
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1201 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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1202 |
10175 | 1203 if (next != NULL) { |
1204 next->container()->inc_container_count(); | |
1205 } else { | |
1206 // Allocate a chunk out of the current virtual space. | |
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1207 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1208 } |
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1209 |
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1210 if (next == NULL) { |
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1211 // Not enough room in current virtual space. Try to commit |
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1212 // more space. |
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1213 size_t expand_vs_by_words = MAX2(medium_chunk_bunch, |
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1214 grow_chunks_by_words); |
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1215 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1216 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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1217 page_size_words); |
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1218 bool vs_expanded = |
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1219 expand_by(current_virtual_space(), aligned_expand_vs_by_words); |
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1220 if (!vs_expanded) { |
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1221 // Should the capacity of the metaspaces be expanded for |
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1222 // this allocation? If it's the virtual space for classes and is |
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1223 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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1224 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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1225 // Get another virtual space. |
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1226 size_t grow_vs_words = |
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1227 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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1228 if (grow_vs(grow_vs_words)) { |
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1229 // Got it. It's on the list now. Get a chunk from it. |
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1230 assert(current_virtual_space()->expanded_words() == 0, |
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1231 "New virtuals space nodes should not have expanded"); |
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1232 |
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1233 size_t grow_chunks_by_words_aligned = align_size_up(grow_chunks_by_words, |
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1234 page_size_words); |
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1235 // We probably want to expand by aligned_expand_vs_by_words here. |
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1236 expand_by(current_virtual_space(), grow_chunks_by_words_aligned); |
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1237 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1238 } |
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1239 } else { |
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1240 // Allocation will fail and induce a GC |
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1241 if (TraceMetadataChunkAllocation && Verbose) { |
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1242 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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1243 " Fail instead of expand the metaspace"); |
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1244 } |
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1245 } |
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1246 } else { |
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1247 // The virtual space expanded, get a new chunk |
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1248 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1249 assert(next != NULL, "Just expanded, should succeed"); |
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1250 } |
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1251 } |
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1252 |
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1253 assert(next == NULL || (next->next() == NULL && next->prev() == NULL), |
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1254 "New chunk is still on some list"); |
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1255 return next; |
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1256 } |
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1257 |
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1258 Metachunk* VirtualSpaceList::get_initialization_chunk(size_t chunk_word_size, |
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1259 size_t chunk_bunch) { |
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1260 // Get a chunk from the chunk freelist |
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1261 Metachunk* new_chunk = get_new_chunk(chunk_word_size, |
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1262 chunk_word_size, |
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1263 chunk_bunch); |
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1264 return new_chunk; |
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1265 } |
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1266 |
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1267 void VirtualSpaceList::print_on(outputStream* st) const { |
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1268 if (TraceMetadataChunkAllocation && Verbose) { |
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1269 VirtualSpaceListIterator iter(virtual_space_list()); |
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1270 while (iter.repeat()) { |
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1271 VirtualSpaceNode* node = iter.get_next(); |
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1272 node->print_on(st); |
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1273 } |
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1274 } |
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1275 } |
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1276 |
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1277 bool VirtualSpaceList::contains(const void *ptr) { |
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1278 VirtualSpaceNode* list = virtual_space_list(); |
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1279 VirtualSpaceListIterator iter(list); |
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1280 while (iter.repeat()) { |
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1281 VirtualSpaceNode* node = iter.get_next(); |
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1282 if (node->reserved()->contains(ptr)) { |
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1283 return true; |
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1284 } |
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1285 } |
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1286 return false; |
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1287 } |
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1288 |
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1289 |
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1290 // MetaspaceGC methods |
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1291 |
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1292 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1293 // Within the VM operation after the GC the attempt to allocate the metadata |
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1294 // should succeed. If the GC did not free enough space for the metaspace |
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1295 // allocation, the HWM is increased so that another virtualspace will be |
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1296 // allocated for the metadata. With perm gen the increase in the perm |
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1297 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1298 // metaspace policy uses those as the small and large steps for the HWM. |
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1299 // |
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1300 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1301 // resize the capacity of the metaspaces. The current implementation |
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1302 // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
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1303 // to resize the Java heap by some GC's. New flags can be implemented |
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1304 // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
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1305 // free space is desirable in the metaspace capacity to decide how much |
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1306 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
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1307 // free space is desirable in the metaspace capacity before decreasing |
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1308 // the HWM. |
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1309 |
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1310 // Calculate the amount to increase the high water mark (HWM). |
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1311 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1312 // another expansion is not requested too soon. If that is not |
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1313 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1314 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1315 // not enough, expand by the size of the allocation (word_size) plus |
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1316 // some. |
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1317 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1318 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1319 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1320 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1321 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1322 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1323 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1324 if (delta_words > min_delta_words) { |
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1325 // Don't want to hit the high water mark on the next |
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1326 // allocation so make the delta greater than just enough |
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1327 // for this allocation. |
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1328 delta_words = MAX2(delta_words, max_delta_words); |
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1329 if (delta_words > max_delta_words) { |
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1330 // This allocation is large but the next ones are probably not |
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1331 // so increase by the minimum. |
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1332 delta_words = delta_words + min_delta_words; |
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1333 } |
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1334 } |
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1335 return delta_words; |
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1336 } |
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1337 |
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1338 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
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1339 |
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1340 // If the user wants a limit, impose one. |
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1341 // The reason for someone using this flag is to limit reserved space. So |
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1342 // for non-class virtual space, compare against virtual spaces that are reserved. |
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1343 // For class virtual space, we only compare against the committed space, not |
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1344 // reserved space, because this is a larger space prereserved for compressed |
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1345 // class pointers. |
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1346 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize)) { |
12236
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parents:
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1347 size_t real_allocated = Metaspace::space_list()->reserved_words() + |
11064
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|
1348 MetaspaceAux::allocated_capacity_bytes(Metaspace::ClassType); |
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1349 if (real_allocated >= MaxMetaspaceSize) { |
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1350 return false; |
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|
1351 } |
8790
7f0cb32dd233
8004241: NPG: Metaspace occupies more memory than specified by -XX:MaxMetaspaceSize option
mgerdin
parents:
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1352 } |
6725
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1353 |
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1354 // Class virtual space should always be expanded. Call GC for the other |
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1355 // metadata virtual space. |
12056
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8003424: Enable Class Data Sharing for CompressedOops
hseigel
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1356 if (Metaspace::using_class_space() && |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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1357 (vsl == Metaspace::class_space_list())) return true; |
6725
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1358 |
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1359 // If this is part of an allocation after a GC, expand |
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1360 // unconditionally. |
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1361 if (MetaspaceGC::expand_after_GC()) { |
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1362 return true; |
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|
1363 } |
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|
1364 |
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1365 |
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1366 // If the capacity is below the minimum capacity, allow the |
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1367 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1368 // to that minimum capacity so that a GC will not be induced |
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1369 // until that minimum capacity is exceeded. |
11064
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1370 size_t committed_capacity_bytes = MetaspaceAux::allocated_capacity_bytes(); |
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1371 size_t metaspace_size_bytes = MetaspaceSize; |
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1372 if (committed_capacity_bytes < metaspace_size_bytes || |
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1373 capacity_until_GC() == 0) { |
10183
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1374 set_capacity_until_GC(metaspace_size_bytes); |
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1375 return true; |
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1376 } else { |
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1377 if (committed_capacity_bytes < capacity_until_GC()) { |
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1378 return true; |
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|
1379 } else { |
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1380 if (TraceMetadataChunkAllocation && Verbose) { |
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1381 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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1382 " capacity_until_GC " SIZE_FORMAT |
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1383 " allocated_capacity_bytes " SIZE_FORMAT, |
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1384 word_size, |
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|
1385 capacity_until_GC(), |
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1386 MetaspaceAux::allocated_capacity_bytes()); |
6725
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|
1387 } |
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1388 return false; |
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|
1389 } |
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|
1390 } |
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|
1391 } |
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|
1392 |
10183
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|
1393 |
6725
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|
1394 |
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|
1395 void MetaspaceGC::compute_new_size() { |
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1396 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1397 uint current_shrink_factor = _shrink_factor; |
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|
1398 _shrink_factor = 0; |
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|
1399 |
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1400 // Until a faster way of calculating the "used" quantity is implemented, |
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1401 // use "capacity". |
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1402 const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
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1403 const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
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1404 |
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1405 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1406 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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|
1407 |
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|
1408 const double min_tmp = used_after_gc / maximum_used_percentage; |
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|
1409 size_t minimum_desired_capacity = |
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1410 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1411 // Don't shrink less than the initial generation size |
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|
1412 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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|
1413 MetaspaceSize); |
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|
1414 |
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1415 if (PrintGCDetails && Verbose) { |
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|
1416 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1417 gclog_or_tty->print_cr(" " |
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|
1418 " minimum_free_percentage: %6.2f" |
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|
1419 " maximum_used_percentage: %6.2f", |
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|
1420 minimum_free_percentage, |
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|
1421 maximum_used_percentage); |
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1422 gclog_or_tty->print_cr(" " |
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1423 " used_after_gc : %6.1fKB", |
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1424 used_after_gc / (double) K); |
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1425 } |
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|
1426 |
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1427 |
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1428 size_t shrink_bytes = 0; |
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1429 if (capacity_until_GC < minimum_desired_capacity) { |
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1430 // If we have less capacity below the metaspace HWM, then |
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1431 // increment the HWM. |
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1432 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1433 // Don't expand unless it's significant |
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1434 if (expand_bytes >= MinMetaspaceExpansion) { |
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1435 MetaspaceGC::set_capacity_until_GC(capacity_until_GC + expand_bytes); |
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1436 } |
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|
1437 if (PrintGCDetails && Verbose) { |
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1438 size_t new_capacity_until_GC = capacity_until_GC; |
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|
1439 gclog_or_tty->print_cr(" expanding:" |
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|
1440 " minimum_desired_capacity: %6.1fKB" |
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1441 " expand_bytes: %6.1fKB" |
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1442 " MinMetaspaceExpansion: %6.1fKB" |
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1443 " new metaspace HWM: %6.1fKB", |
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1444 minimum_desired_capacity / (double) K, |
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|
1445 expand_bytes / (double) K, |
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1446 MinMetaspaceExpansion / (double) K, |
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|
1447 new_capacity_until_GC / (double) K); |
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|
1448 } |
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|
1449 return; |
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|
1450 } |
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|
1451 |
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1452 // No expansion, now see if we want to shrink |
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1453 // We would never want to shrink more than this |
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1454 size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
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1455 assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
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1456 max_shrink_bytes)); |
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|
1457 |
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1458 // Should shrinking be considered? |
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1459 if (MaxMetaspaceFreeRatio < 100) { |
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1460 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1461 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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|
1462 const double max_tmp = used_after_gc / minimum_used_percentage; |
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|
1463 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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|
1464 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1465 MetaspaceSize); |
10183
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1466 if (PrintGCDetails && Verbose) { |
6725
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1467 gclog_or_tty->print_cr(" " |
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|
1468 " maximum_free_percentage: %6.2f" |
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|
1469 " minimum_used_percentage: %6.2f", |
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|
1470 maximum_free_percentage, |
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|
1471 minimum_used_percentage); |
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|
1472 gclog_or_tty->print_cr(" " |
10183
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1473 " minimum_desired_capacity: %6.1fKB" |
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|
1474 " maximum_desired_capacity: %6.1fKB", |
6725
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|
1475 minimum_desired_capacity / (double) K, |
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|
1476 maximum_desired_capacity / (double) K); |
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diff
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|
1477 } |
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|
1478 |
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|
1479 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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|
1480 "sanity check"); |
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|
1481 |
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1482 if (capacity_until_GC > maximum_desired_capacity) { |
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1483 // Capacity too large, compute shrinking size |
10183
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1484 shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
6725
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1485 // We don't want shrink all the way back to initSize if people call |
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1486 // System.gc(), because some programs do that between "phases" and then |
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1487 // we'd just have to grow the heap up again for the next phase. So we |
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1488 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1489 // on the third call, and 100% by the fourth call. But if we recompute |
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1490 // size without shrinking, it goes back to 0%. |
10183
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1491 shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
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1492 assert(shrink_bytes <= max_shrink_bytes, |
6725
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1493 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
10183
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|
1494 shrink_bytes, max_shrink_bytes)); |
6725
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1495 if (current_shrink_factor == 0) { |
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|
1496 _shrink_factor = 10; |
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|
1497 } else { |
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|
1498 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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|
1499 } |
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|
1500 if (PrintGCDetails && Verbose) { |
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|
1501 gclog_or_tty->print_cr(" " |
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|
1502 " shrinking:" |
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|
1503 " initSize: %.1fK" |
da91efe96a93
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|
1504 " maximum_desired_capacity: %.1fK", |
da91efe96a93
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coleenp
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changeset
|
1505 MetaspaceSize / (double) K, |
da91efe96a93
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parents:
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changeset
|
1506 maximum_desired_capacity / (double) K); |
da91efe96a93
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|
1507 gclog_or_tty->print_cr(" " |
10183
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|
1508 " shrink_bytes: %.1fK" |
6725
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|
1509 " current_shrink_factor: %d" |
da91efe96a93
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coleenp
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diff
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|
1510 " new shrink factor: %d" |
da91efe96a93
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|
1511 " MinMetaspaceExpansion: %.1fK", |
10183
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|
1512 shrink_bytes / (double) K, |
6725
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|
1513 current_shrink_factor, |
da91efe96a93
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changeset
|
1514 _shrink_factor, |
da91efe96a93
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coleenp
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changeset
|
1515 MinMetaspaceExpansion / (double) K); |
da91efe96a93
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parents:
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|
1516 } |
da91efe96a93
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|
1517 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1518 } |
da91efe96a93
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coleenp
parents:
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changeset
|
1519 |
da91efe96a93
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|
1520 // Don't shrink unless it's significant |
10183
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|
1521 if (shrink_bytes >= MinMetaspaceExpansion && |
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1522 ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
868d87ed63c8
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|
1523 MetaspaceGC::set_capacity_until_GC(capacity_until_GC - shrink_bytes); |
6725
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parents:
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|
1524 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1525 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1526 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1527 // Metadebug methods |
da91efe96a93
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coleenp
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diff
changeset
|
1528 |
da91efe96a93
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coleenp
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|
1529 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
da91efe96a93
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diff
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|
1530 size_t chunk_word_size){ |
da91efe96a93
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parents:
diff
changeset
|
1531 #ifdef ASSERT |
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|
1532 VirtualSpaceList* vsl = sm->vs_list(); |
da91efe96a93
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coleenp
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diff
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|
1533 if (MetaDataDeallocateALot && |
da91efe96a93
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|
1534 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
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|
1535 Metadebug::reset_deallocate_chunk_a_lot_count(); |
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diff
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|
1536 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
da91efe96a93
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coleenp
parents:
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|
1537 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1538 if (dummy_chunk == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1539 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1540 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1541 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1542 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1543 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
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parents:
diff
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|
1544 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
da91efe96a93
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coleenp
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diff
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|
1545 sm->sum_count_in_chunks_in_use()); |
da91efe96a93
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coleenp
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diff
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|
1546 dummy_chunk->print_on(gclog_or_tty); |
da91efe96a93
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coleenp
parents:
diff
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|
1547 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
12235 | 1548 vsl->chunk_manager()->free_chunks_total_words(), |
6725
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diff
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|
1549 vsl->chunk_manager()->free_chunks_count()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1550 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1551 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1552 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1553 Metadebug::inc_deallocate_chunk_a_lot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1554 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1555 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1556 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1557 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1558 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1559 size_t raw_word_size){ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1560 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1561 if (MetaDataDeallocateALot && |
da91efe96a93
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coleenp
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diff
changeset
|
1562 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1563 Metadebug::set_deallocate_block_a_lot_count(0); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1564 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1565 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1566 if (dummy_block == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1567 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1568 } |
6885 | 1569 sm->deallocate(dummy_block, raw_word_size); |
6725
da91efe96a93
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coleenp
parents:
diff
changeset
|
1570 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1571 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1572 Metadebug::inc_deallocate_block_a_lot_count(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1573 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1574 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1575 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1576 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1577 void Metadebug::init_allocation_fail_alot_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1578 if (MetadataAllocationFailALot) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1579 _allocation_fail_alot_count = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1580 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1581 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1582 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1583 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1584 #ifdef ASSERT |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1585 bool Metadebug::test_metadata_failure() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1586 if (MetadataAllocationFailALot && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1587 Threads::is_vm_complete()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1588 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1589 _allocation_fail_alot_count--; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1590 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1591 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1592 gclog_or_tty->print_cr("Metadata allocation failing for " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1593 "MetadataAllocationFailALot"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1594 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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1595 init_allocation_fail_alot_count(); |
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1596 return true; |
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|
1597 } |
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1598 } |
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1599 return false; |
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1600 } |
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1601 #endif |
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1602 |
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1603 // ChunkManager methods |
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1604 |
12235 | 1605 size_t ChunkManager::free_chunks_total_words() { |
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1606 return _free_chunks_total; |
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1607 } |
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1608 |
12235 | 1609 size_t ChunkManager::free_chunks_total_bytes() { |
1610 return free_chunks_total_words() * BytesPerWord; | |
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1611 } |
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1612 |
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1613 size_t ChunkManager::free_chunks_count() { |
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1614 #ifdef ASSERT |
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1615 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1616 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1617 Mutex::_no_safepoint_check_flag); |
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1618 // This lock is only needed in debug because the verification |
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1619 // of the _free_chunks_totals walks the list of free chunks |
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1620 slow_locked_verify_free_chunks_count(); |
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1621 } |
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1622 #endif |
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1623 return _free_chunks_count; |
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1624 } |
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1625 |
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1626 void ChunkManager::locked_verify_free_chunks_total() { |
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1627 assert_lock_strong(SpaceManager::expand_lock()); |
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1628 assert(sum_free_chunks() == _free_chunks_total, |
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1629 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
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1630 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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1631 sum_free_chunks())); |
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1632 } |
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1633 |
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1634 void ChunkManager::verify_free_chunks_total() { |
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1635 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1636 Mutex::_no_safepoint_check_flag); |
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1637 locked_verify_free_chunks_total(); |
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1638 } |
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1639 |
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1640 void ChunkManager::locked_verify_free_chunks_count() { |
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1641 assert_lock_strong(SpaceManager::expand_lock()); |
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1642 assert(sum_free_chunks_count() == _free_chunks_count, |
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1643 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1644 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1645 sum_free_chunks_count())); |
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|
1646 } |
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1647 |
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1648 void ChunkManager::verify_free_chunks_count() { |
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1649 #ifdef ASSERT |
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1650 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1651 Mutex::_no_safepoint_check_flag); |
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1652 locked_verify_free_chunks_count(); |
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1653 #endif |
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1654 } |
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1655 |
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1656 void ChunkManager::verify() { |
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1657 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1658 Mutex::_no_safepoint_check_flag); |
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1659 locked_verify(); |
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1660 } |
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1661 |
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1662 void ChunkManager::locked_verify() { |
6885 | 1663 locked_verify_free_chunks_count(); |
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1664 locked_verify_free_chunks_total(); |
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|
1665 } |
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|
1666 |
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1667 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1668 assert_lock_strong(SpaceManager::expand_lock()); |
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1669 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1670 _free_chunks_total, _free_chunks_count); |
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1671 } |
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|
1672 |
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1673 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1674 assert_lock_strong(SpaceManager::expand_lock()); |
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1675 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1676 sum_free_chunks(), sum_free_chunks_count()); |
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1677 } |
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1678 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1679 return &_free_chunks[index]; |
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|
1680 } |
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|
1681 |
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1682 // These methods that sum the free chunk lists are used in printing |
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1683 // methods that are used in product builds. |
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1684 size_t ChunkManager::sum_free_chunks() { |
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1685 assert_lock_strong(SpaceManager::expand_lock()); |
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1686 size_t result = 0; |
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1687 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1688 ChunkList* list = free_chunks(i); |
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|
1689 |
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|
1690 if (list == NULL) { |
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|
1691 continue; |
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|
1692 } |
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|
1693 |
10101
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|
1694 result = result + list->count() * list->size(); |
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1695 } |
6885 | 1696 result = result + humongous_dictionary()->total_size(); |
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1697 return result; |
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|
1698 } |
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|
1699 |
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1700 size_t ChunkManager::sum_free_chunks_count() { |
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1701 assert_lock_strong(SpaceManager::expand_lock()); |
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1702 size_t count = 0; |
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1703 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
6725
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1704 ChunkList* list = free_chunks(i); |
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1705 if (list == NULL) { |
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|
1706 continue; |
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1707 } |
10101
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1708 count = count + list->count(); |
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1709 } |
6885 | 1710 count = count + humongous_dictionary()->total_free_blocks(); |
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1711 return count; |
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|
1712 } |
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|
1713 |
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1714 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1715 ChunkIndex index = list_index(word_size); |
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1716 assert(index < HumongousIndex, "No humongous list"); |
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1717 return free_chunks(index); |
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1718 } |
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|
1719 |
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1720 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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|
1721 assert_lock_strong(SpaceManager::expand_lock()); |
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1722 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1723 chunk->set_next(free_list->head()); |
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1724 free_list->set_head(chunk); |
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1725 // chunk is being returned to the chunk free list |
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1726 inc_free_chunks_total(chunk->capacity_word_size()); |
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1727 slow_locked_verify(); |
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1728 } |
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1729 |
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1730 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1731 // The deallocation of a chunk originates in the freelist |
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1732 // manangement code for a Metaspace and does not hold the |
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1733 // lock. |
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1734 assert(chunk != NULL, "Deallocating NULL"); |
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1735 assert_lock_strong(SpaceManager::expand_lock()); |
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1736 slow_locked_verify(); |
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1737 if (TraceMetadataChunkAllocation) { |
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1738 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1739 PTR_FORMAT " size " SIZE_FORMAT, |
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1740 chunk, chunk->word_size()); |
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1741 } |
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1742 free_chunks_put(chunk); |
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1743 } |
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1744 |
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1745 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1746 assert_lock_strong(SpaceManager::expand_lock()); |
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1747 |
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1748 slow_locked_verify(); |
6885 | 1749 |
1750 Metachunk* chunk = NULL; | |
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1751 if (list_index(word_size) != HumongousIndex) { |
6885 | 1752 ChunkList* free_list = find_free_chunks_list(word_size); |
1753 assert(free_list != NULL, "Sanity check"); | |
1754 | |
1755 chunk = free_list->head(); | |
1756 debug_only(Metachunk* debug_head = chunk;) | |
1757 | |
1758 if (chunk == NULL) { | |
1759 return NULL; | |
1760 } | |
1761 | |
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1762 // Remove the chunk as the head of the list. |
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1763 free_list->remove_chunk(chunk); |
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1764 |
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1765 // Chunk is being removed from the chunks free list. |
6885 | 1766 dec_free_chunks_total(chunk->capacity_word_size()); |
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1767 |
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1768 if (TraceMetadataChunkAllocation && Verbose) { |
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1769 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1770 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1771 free_list, chunk, chunk->word_size()); |
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1772 } |
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1773 } else { |
6885 | 1774 chunk = humongous_dictionary()->get_chunk( |
1775 word_size, | |
1776 FreeBlockDictionary<Metachunk>::atLeast); | |
1777 | |
1778 if (chunk != NULL) { | |
1779 if (TraceMetadataHumongousAllocation) { | |
1780 size_t waste = chunk->word_size() - word_size; | |
1781 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT | |
1782 " for requested size " SIZE_FORMAT | |
1783 " waste " SIZE_FORMAT, | |
1784 chunk->word_size(), word_size, waste); | |
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1785 } |
6885 | 1786 // Chunk is being removed from the chunks free list. |
1787 dec_free_chunks_total(chunk->capacity_word_size()); | |
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1788 } else { |
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1789 return NULL; |
6885 | 1790 } |
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1791 } |
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1792 |
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1793 // Remove it from the links to this freelist |
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1794 chunk->set_next(NULL); |
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1795 chunk->set_prev(NULL); |
10175 | 1796 #ifdef ASSERT |
1797 // Chunk is no longer on any freelist. Setting to false make container_count_slow() | |
1798 // work. | |
1799 chunk->set_is_free(false); | |
1800 #endif | |
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1801 slow_locked_verify(); |
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1802 return chunk; |
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1803 } |
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1804 |
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1805 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1806 assert_lock_strong(SpaceManager::expand_lock()); |
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1807 slow_locked_verify(); |
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1808 |
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1809 // Take from the beginning of the list |
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1810 Metachunk* chunk = free_chunks_get(word_size); |
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1811 if (chunk == NULL) { |
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1812 return NULL; |
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1813 } |
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1814 |
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1815 assert((word_size <= chunk->word_size()) || |
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1816 list_index(chunk->word_size() == HumongousIndex), |
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1817 "Non-humongous variable sized chunk"); |
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1818 if (TraceMetadataChunkAllocation) { |
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1819 size_t list_count; |
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1820 if (list_index(word_size) < HumongousIndex) { |
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1821 ChunkList* list = find_free_chunks_list(word_size); |
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1822 list_count = list->count(); |
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1823 } else { |
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1824 list_count = humongous_dictionary()->total_count(); |
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1825 } |
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1826 tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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1827 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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1828 this, chunk, chunk->word_size(), list_count); |
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1829 locked_print_free_chunks(tty); |
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1830 } |
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1831 |
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1832 return chunk; |
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1833 } |
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1834 |
6885 | 1835 void ChunkManager::print_on(outputStream* out) { |
1836 if (PrintFLSStatistics != 0) { | |
1837 humongous_dictionary()->report_statistics(); | |
1838 } | |
1839 } | |
1840 | |
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1841 // SpaceManager methods |
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1842 |
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1843 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1844 size_t* chunk_word_size, |
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1845 size_t* class_chunk_word_size) { |
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1846 switch (type) { |
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1847 case Metaspace::BootMetaspaceType: |
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1848 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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1849 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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1850 break; |
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1851 case Metaspace::ROMetaspaceType: |
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1852 *chunk_word_size = SharedReadOnlySize / wordSize; |
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1853 *class_chunk_word_size = ClassSpecializedChunk; |
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1854 break; |
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1855 case Metaspace::ReadWriteMetaspaceType: |
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1856 *chunk_word_size = SharedReadWriteSize / wordSize; |
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1857 *class_chunk_word_size = ClassSpecializedChunk; |
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1858 break; |
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1859 case Metaspace::AnonymousMetaspaceType: |
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1860 case Metaspace::ReflectionMetaspaceType: |
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1861 *chunk_word_size = SpecializedChunk; |
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1862 *class_chunk_word_size = ClassSpecializedChunk; |
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1863 break; |
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1864 default: |
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1865 *chunk_word_size = SmallChunk; |
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1866 *class_chunk_word_size = ClassSmallChunk; |
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1867 break; |
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1868 } |
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1869 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
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1870 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
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1871 " class " SIZE_FORMAT, |
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1872 *chunk_word_size, *class_chunk_word_size)); |
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1873 } |
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1874 |
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1875 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1876 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1877 size_t free = 0; |
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1878 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1879 Metachunk* chunk = chunks_in_use(i); |
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1880 while (chunk != NULL) { |
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1881 free += chunk->free_word_size(); |
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1882 chunk = chunk->next(); |
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1883 } |
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1884 } |
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1885 return free; |
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1886 } |
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1887 |
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1888 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1889 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1890 size_t result = 0; |
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1891 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1892 result += sum_waste_in_chunks_in_use(i); |
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1893 } |
6885 | 1894 |
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1895 return result; |
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1896 } |
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1897 |
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1898 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1899 size_t result = 0; |
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1900 Metachunk* chunk = chunks_in_use(index); |
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1901 // Count the free space in all the chunk but not the |
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1902 // current chunk from which allocations are still being done. |
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1903 while (chunk != NULL) { |
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1904 if (chunk != current_chunk()) { |
6885 | 1905 result += chunk->free_word_size(); |
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1906 } |
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1907 chunk = chunk->next(); |
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1908 } |
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1909 return result; |
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1910 } |
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1911 |
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1912 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1913 // For CMS use "allocated_chunks_words()" which does not need the |
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1914 // Metaspace lock. For the other collectors sum over the |
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1915 // lists. Use both methods as a check that "allocated_chunks_words()" |
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1916 // is correct. That is, sum_capacity_in_chunks() is too expensive |
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1917 // to use in the product and allocated_chunks_words() should be used |
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1918 // but allow for checking that allocated_chunks_words() returns the same |
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1919 // value as sum_capacity_in_chunks_in_use() which is the definitive |
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1920 // answer. |
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1921 if (UseConcMarkSweepGC) { |
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1922 return allocated_chunks_words(); |
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1923 } else { |
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1924 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1925 size_t sum = 0; |
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1926 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1927 Metachunk* chunk = chunks_in_use(i); |
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1928 while (chunk != NULL) { |
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1929 sum += chunk->capacity_word_size(); |
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1930 chunk = chunk->next(); |
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1931 } |
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1932 } |
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1933 return sum; |
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1934 } |
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1935 } |
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1936 |
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1937 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1938 size_t count = 0; |
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1939 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1940 count = count + sum_count_in_chunks_in_use(i); |
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1941 } |
6885 | 1942 |
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1943 return count; |
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1944 } |
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1945 |
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1946 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1947 size_t count = 0; |
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1948 Metachunk* chunk = chunks_in_use(i); |
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1949 while (chunk != NULL) { |
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1950 count++; |
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1951 chunk = chunk->next(); |
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1952 } |
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1953 return count; |
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1954 } |
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1955 |
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1956 |
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1957 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1958 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1959 size_t used = 0; |
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1960 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1961 Metachunk* chunk = chunks_in_use(i); |
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1962 while (chunk != NULL) { |
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1963 used += chunk->used_word_size(); |
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1964 chunk = chunk->next(); |
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1965 } |
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1966 } |
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1967 return used; |
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1968 } |
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1969 |
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1970 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1971 |
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1972 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1973 Metachunk* chunk = chunks_in_use(i); |
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1974 st->print("SpaceManager: %s " PTR_FORMAT, |
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1975 chunk_size_name(i), chunk); |
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1976 if (chunk != NULL) { |
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1977 st->print_cr(" free " SIZE_FORMAT, |
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1978 chunk->free_word_size()); |
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1979 } else { |
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1980 st->print_cr(""); |
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1981 } |
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1982 } |
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1983 |
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1984 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
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1985 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
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1986 } |
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1987 |
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1988 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1989 |
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1990 // Decide between a small chunk and a medium chunk. Up to |
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1991 // _small_chunk_limit small chunks can be allocated but |
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1992 // once a medium chunk has been allocated, no more small |
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1993 // chunks will be allocated. |
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1994 size_t chunk_word_size; |
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1995 if (chunks_in_use(MediumIndex) == NULL && |
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1996 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
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1997 chunk_word_size = (size_t) small_chunk_size(); |
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1998 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
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1999 chunk_word_size = medium_chunk_size(); |
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2000 } |
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2001 } else { |
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2002 chunk_word_size = medium_chunk_size(); |
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2003 } |
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2004 |
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2005 // Might still need a humongous chunk. Enforce an |
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2006 // eight word granularity to facilitate reuse (some |
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2007 // wastage but better chance of reuse). |
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2008 size_t if_humongous_sized_chunk = |
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2009 align_size_up(word_size + Metachunk::overhead(), |
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2010 HumongousChunkGranularity); |
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2011 chunk_word_size = |
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2012 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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2013 |
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2014 assert(!SpaceManager::is_humongous(word_size) || |
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2015 chunk_word_size == if_humongous_sized_chunk, |
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2016 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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2017 " chunk_word_size " SIZE_FORMAT, |
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2018 word_size, chunk_word_size)); |
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2019 if (TraceMetadataHumongousAllocation && |
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2020 SpaceManager::is_humongous(word_size)) { |
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2021 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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2022 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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2023 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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2024 chunk_word_size); |
6885 | 2025 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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2026 Metachunk::overhead()); |
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2027 } |
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2028 return chunk_word_size; |
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2029 } |
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2030 |
6885 | 2031 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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2032 assert(vs_list()->current_virtual_space() != NULL, |
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2033 "Should have been set"); |
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2034 assert(current_chunk() == NULL || |
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2035 current_chunk()->allocate(word_size) == NULL, |
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2036 "Don't need to expand"); |
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2037 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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2038 |
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2039 if (TraceMetadataChunkAllocation && Verbose) { |
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2040 size_t words_left = 0; |
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2041 size_t words_used = 0; |
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2042 if (current_chunk() != NULL) { |
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2043 words_left = current_chunk()->free_word_size(); |
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2044 words_used = current_chunk()->used_word_size(); |
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2045 } |
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2046 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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2047 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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2048 " words left", |
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2049 word_size, words_used, words_left); |
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2050 } |
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2051 |
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2052 // Get another chunk out of the virtual space |
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2053 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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2054 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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2055 |
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2056 // If a chunk was available, add it to the in-use chunk list |
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2057 // and do an allocation from it. |
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2058 if (next != NULL) { |
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2059 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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2060 // Add to this manager's list of chunks in use. |
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2061 add_chunk(next, false); |
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2062 return next->allocate(word_size); |
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2063 } |
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2064 return NULL; |
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2065 } |
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2066 |
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2067 void SpaceManager::print_on(outputStream* st) const { |
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2068 |
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2069 for (ChunkIndex i = ZeroIndex; |
6885 | 2070 i < NumberOfInUseLists ; |
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2071 i = next_chunk_index(i) ) { |
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2072 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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2073 chunks_in_use(i), |
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2074 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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2075 } |
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2076 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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2077 " Humongous " SIZE_FORMAT, |
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2078 sum_waste_in_chunks_in_use(SmallIndex), |
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2079 sum_waste_in_chunks_in_use(MediumIndex), |
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2080 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 2081 // block free lists |
2082 if (block_freelists() != NULL) { | |
2083 st->print_cr("total in block free lists " SIZE_FORMAT, | |
2084 block_freelists()->total_size()); | |
2085 } | |
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2086 } |
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2087 |
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2088 SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
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2089 Mutex* lock, |
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2090 VirtualSpaceList* vs_list) : |
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2091 _vs_list(vs_list), |
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2092 _mdtype(mdtype), |
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2093 _allocated_blocks_words(0), |
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2094 _allocated_chunks_words(0), |
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2095 _allocated_chunks_count(0), |
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2096 _lock(lock) |
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2097 { |
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2098 initialize(); |
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2099 } |
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2100 |
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2101 void SpaceManager::inc_size_metrics(size_t words) { |
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2102 assert_lock_strong(SpaceManager::expand_lock()); |
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2103 // Total of allocated Metachunks and allocated Metachunks count |
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2104 // for each SpaceManager |
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2105 _allocated_chunks_words = _allocated_chunks_words + words; |
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2106 _allocated_chunks_count++; |
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2107 // Global total of capacity in allocated Metachunks |
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2108 MetaspaceAux::inc_capacity(mdtype(), words); |
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2109 // Global total of allocated Metablocks. |
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2110 // used_words_slow() includes the overhead in each |
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2111 // Metachunk so include it in the used when the |
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2112 // Metachunk is first added (so only added once per |
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2113 // Metachunk). |
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2114 MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
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2115 } |
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2116 |
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2117 void SpaceManager::inc_used_metrics(size_t words) { |
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2118 // Add to the per SpaceManager total |
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2119 Atomic::add_ptr(words, &_allocated_blocks_words); |
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2120 // Add to the global total |
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2121 MetaspaceAux::inc_used(mdtype(), words); |
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2122 } |
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2123 |
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2124 void SpaceManager::dec_total_from_size_metrics() { |
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2125 MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
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2126 MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
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2127 // Also deduct the overhead per Metachunk |
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2128 MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
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2129 } |
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2130 |
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2131 void SpaceManager::initialize() { |
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2132 Metadebug::init_allocation_fail_alot_count(); |
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2133 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2134 _chunks_in_use[i] = NULL; |
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2135 } |
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2136 _current_chunk = NULL; |
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2137 if (TraceMetadataChunkAllocation && Verbose) { |
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2138 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2139 } |
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2140 } |
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2141 |
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2142 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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2143 if (chunks == NULL) { |
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2144 return; |
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2145 } |
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2146 ChunkList* list = free_chunks(index); |
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2147 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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2148 assert_lock_strong(SpaceManager::expand_lock()); |
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2149 Metachunk* cur = chunks; |
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2150 |
10175 | 2151 // This returns chunks one at a time. If a new |
10101
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2152 // class List can be created that is a base class |
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2153 // of FreeList then something like FreeList::prepend() |
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2154 // can be used in place of this loop |
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2155 while (cur != NULL) { |
10175 | 2156 assert(cur->container() != NULL, "Container should have been set"); |
2157 cur->container()->dec_container_count(); | |
10101
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2158 // Capture the next link before it is changed |
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2159 // by the call to return_chunk_at_head(); |
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2160 Metachunk* next = cur->next(); |
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2161 cur->set_is_free(true); |
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2162 list->return_chunk_at_head(cur); |
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2163 cur = next; |
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2164 } |
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2165 } |
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2166 |
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2167 SpaceManager::~SpaceManager() { |
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2168 // This call this->_lock which can't be done while holding expand_lock() |
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2169 assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
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2170 err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
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2171 " allocated_chunks_words() " SIZE_FORMAT, |
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2172 sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
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2173 |
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2174 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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2175 Mutex::_no_safepoint_check_flag); |
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2176 |
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2177 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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2178 |
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2179 chunk_manager->slow_locked_verify(); |
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2180 |
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2181 dec_total_from_size_metrics(); |
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2182 |
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2183 if (TraceMetadataChunkAllocation && Verbose) { |
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2184 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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2185 locked_print_chunks_in_use_on(gclog_or_tty); |
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2186 } |
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2187 |
10175 | 2188 // Do not mangle freed Metachunks. The chunk size inside Metachunks |
2189 // is during the freeing of a VirtualSpaceNodes. | |
7185
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2190 |
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2191 // Have to update before the chunks_in_use lists are emptied |
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2192 // below. |
10183
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2193 chunk_manager->inc_free_chunks_total(allocated_chunks_words(), |
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2194 sum_count_in_chunks_in_use()); |
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2195 |
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2196 // Add all the chunks in use by this space manager |
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2197 // to the global list of free chunks. |
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2198 |
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2199 // Follow each list of chunks-in-use and add them to the |
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2200 // free lists. Each list is NULL terminated. |
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2201 |
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2202 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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2203 if (TraceMetadataChunkAllocation && Verbose) { |
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2204 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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2205 sum_count_in_chunks_in_use(i), |
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2206 chunk_size_name(i)); |
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2207 } |
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2208 Metachunk* chunks = chunks_in_use(i); |
10101
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2209 chunk_manager->return_chunks(i, chunks); |
7446
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2210 set_chunks_in_use(i, NULL); |
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2211 if (TraceMetadataChunkAllocation && Verbose) { |
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2212 gclog_or_tty->print_cr("updated freelist count %d %s", |
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2213 chunk_manager->free_chunks(i)->count(), |
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2214 chunk_size_name(i)); |
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2215 } |
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2216 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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2217 } |
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2218 |
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2219 // The medium chunk case may be optimized by passing the head and |
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2220 // tail of the medium chunk list to add_at_head(). The tail is often |
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2221 // the current chunk but there are probably exceptions. |
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2222 |
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2223 // Humongous chunks |
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2224 if (TraceMetadataChunkAllocation && Verbose) { |
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2225 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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2226 sum_count_in_chunks_in_use(HumongousIndex), |
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2227 chunk_size_name(HumongousIndex)); |
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2228 gclog_or_tty->print("Humongous chunk dictionary: "); |
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2229 } |
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2230 // Humongous chunks are never the current chunk. |
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2231 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2232 |
6885 | 2233 while (humongous_chunks != NULL) { |
2234 #ifdef ASSERT | |
2235 humongous_chunks->set_is_free(true); | |
2236 #endif | |
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2237 if (TraceMetadataChunkAllocation && Verbose) { |
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2238 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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2239 humongous_chunks, |
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2240 humongous_chunks->word_size()); |
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2241 } |
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2242 assert(humongous_chunks->word_size() == (size_t) |
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2243 align_size_up(humongous_chunks->word_size(), |
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2244 HumongousChunkGranularity), |
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2245 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
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2246 " granularity %d", |
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2247 humongous_chunks->word_size(), HumongousChunkGranularity)); |
6885 | 2248 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
10175 | 2249 humongous_chunks->container()->dec_container_count(); |
6885 | 2250 chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); |
2251 humongous_chunks = next_humongous_chunks; | |
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2252 } |
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2253 if (TraceMetadataChunkAllocation && Verbose) { |
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2254 gclog_or_tty->print_cr(""); |
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2255 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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2256 chunk_manager->humongous_dictionary()->total_count(), |
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2257 chunk_size_name(HumongousIndex)); |
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2258 } |
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2259 chunk_manager->slow_locked_verify(); |
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2260 } |
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2261 |
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2262 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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2263 switch (index) { |
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2264 case SpecializedIndex: |
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2265 return "Specialized"; |
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2266 case SmallIndex: |
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2267 return "Small"; |
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2268 case MediumIndex: |
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2269 return "Medium"; |
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2270 case HumongousIndex: |
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2271 return "Humongous"; |
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2272 default: |
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2273 return NULL; |
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|
2274 } |
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2275 } |
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2276 |
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2277 ChunkIndex ChunkManager::list_index(size_t size) { |
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2278 switch (size) { |
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2279 case SpecializedChunk: |
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2280 assert(SpecializedChunk == ClassSpecializedChunk, |
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2281 "Need branch for ClassSpecializedChunk"); |
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2282 return SpecializedIndex; |
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2283 case SmallChunk: |
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2284 case ClassSmallChunk: |
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2285 return SmallIndex; |
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2286 case MediumChunk: |
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2287 case ClassMediumChunk: |
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2288 return MediumIndex; |
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2289 default: |
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2290 assert(size > MediumChunk || size > ClassMediumChunk, |
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2291 "Not a humongous chunk"); |
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2292 return HumongousIndex; |
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2293 } |
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2294 } |
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2295 |
6885 | 2296 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2297 assert_lock_strong(_lock); |
11966 | 2298 size_t raw_word_size = get_raw_word_size(word_size); |
6885 | 2299 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
11966 | 2300 assert(raw_word_size >= min_size, |
12056
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2301 err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
11966 | 2302 block_freelists()->return_block(p, raw_word_size); |
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2303 } |
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2304 |
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2305 // Adds a chunk to the list of chunks in use. |
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2306 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2307 |
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2308 assert(new_chunk != NULL, "Should not be NULL"); |
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2309 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2310 |
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2311 new_chunk->reset_empty(); |
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2312 |
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2313 // Find the correct list and and set the current |
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2314 // chunk for that list. |
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2315 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2316 |
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2317 if (index != HumongousIndex) { |
12231
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2318 retire_current_chunk(); |
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2319 set_current_chunk(new_chunk); |
7446
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2320 new_chunk->set_next(chunks_in_use(index)); |
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2321 set_chunks_in_use(index, new_chunk); |
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2322 } else { |
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2323 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2324 // small, so small will be null. Link this first chunk as the current |
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2325 // chunk. |
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2326 if (make_current) { |
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2327 // Set as the current chunk but otherwise treat as a humongous chunk. |
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|
2328 set_current_chunk(new_chunk); |
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|
2329 } |
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|
2330 // Link at head. The _current_chunk only points to a humongous chunk for |
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|
2331 // the null class loader metaspace (class and data virtual space managers) |
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2332 // any humongous chunks so will not point to the tail |
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2333 // of the humongous chunks list. |
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2334 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2335 set_chunks_in_use(HumongousIndex, new_chunk); |
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|
2336 |
7447
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|
2337 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
6725
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|
2338 } |
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|
2339 |
10183
868d87ed63c8
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10175
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|
2340 // Add to the running sum of capacity |
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|
2341 inc_size_metrics(new_chunk->word_size()); |
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|
2342 |
6725
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2343 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2344 if (TraceMetadataChunkAllocation && Verbose) { |
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2345 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2346 sum_count_in_chunks_in_use()); |
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|
2347 new_chunk->print_on(gclog_or_tty); |
10183
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2348 if (vs_list() != NULL) { |
868d87ed63c8
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10175
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|
2349 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
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|
2350 } |
6725
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|
2351 } |
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|
2352 } |
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|
2353 |
12231
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|
2354 void SpaceManager::retire_current_chunk() { |
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|
2355 if (current_chunk() != NULL) { |
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|
2356 size_t remaining_words = current_chunk()->free_word_size(); |
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|
2357 if (remaining_words >= TreeChunk<Metablock, FreeList>::min_size()) { |
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|
2358 block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
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|
2359 inc_used_metrics(remaining_words); |
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|
2360 } |
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|
2361 } |
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|
2362 } |
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|
2363 |
7446
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|
2364 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
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|
2365 size_t grow_chunks_by_words) { |
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|
2366 |
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|
2367 Metachunk* next = vs_list()->get_new_chunk(word_size, |
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|
2368 grow_chunks_by_words, |
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|
2369 medium_chunk_bunch()); |
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|
2370 |
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|
2371 if (TraceMetadataHumongousAllocation && |
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|
2372 SpaceManager::is_humongous(next->word_size())) { |
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|
2373 gclog_or_tty->print_cr(" new humongous chunk word size " PTR_FORMAT, |
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|
2374 next->word_size()); |
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|
2375 } |
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|
2376 |
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|
2377 return next; |
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|
2378 } |
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|
2379 |
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2380 MetaWord* SpaceManager::allocate(size_t word_size) { |
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|
2381 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
2382 |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
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10330
diff
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|
2383 size_t raw_word_size = get_raw_word_size(word_size); |
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|
2384 BlockFreelist* fl = block_freelists(); |
6885 | 2385 MetaWord* p = NULL; |
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|
2386 // Allocation from the dictionary is expensive in the sense that |
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|
2387 // the dictionary has to be searched for a size. Don't allocate |
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|
2388 // from the dictionary until it starts to get fat. Is this |
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2389 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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|
2390 // for allocations. Do some profiling. JJJ |
6885 | 2391 if (fl->total_size() > allocation_from_dictionary_limit) { |
2392 p = fl->get_block(raw_word_size); | |
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2393 } |
6885 | 2394 if (p == NULL) { |
2395 p = allocate_work(raw_word_size); | |
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2396 } |
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|
2397 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
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parents:
diff
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|
2398 |
6885 | 2399 return p; |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2400 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2401 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2402 // Returns the address of spaced allocated for "word_size". |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2403 // This methods does not know about blocks (Metablocks) |
6885 | 2404 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2405 assert_lock_strong(_lock); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2406 #ifdef ASSERT |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2407 if (Metadebug::test_metadata_failure()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2408 return NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2409 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2410 #endif |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2411 // Is there space in the current chunk? |
6885 | 2412 MetaWord* result = NULL; |
6725
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parents:
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|
2413 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2414 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2415 // never null because we gave it the size we wanted. Caller reports out |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2416 // of memory if this returns null. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2417 if (DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2418 assert(current_chunk() != NULL, "should never happen"); |
10183
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|
2419 inc_used_metrics(word_size); |
6725
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|
2420 return current_chunk()->allocate(word_size); // caller handles null result |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2421 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2422 if (current_chunk() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2423 result = current_chunk()->allocate(word_size); |
da91efe96a93
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coleenp
parents:
diff
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|
2424 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2425 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2426 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2427 result = grow_and_allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2428 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
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|
2429 if (result != 0) { |
10183
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|
2430 inc_used_metrics(word_size); |
6885 | 2431 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2432 "Head of the list is being allocated"); | |
6725
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|
2433 } |
da91efe96a93
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parents:
diff
changeset
|
2434 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2435 return result; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2436 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2437 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2438 void SpaceManager::verify() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2439 // If there are blocks in the dictionary, then |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2440 // verfication of chunks does not work since |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2441 // being in the dictionary alters a chunk. |
6885 | 2442 if (block_freelists()->total_size() == 0) { |
7446
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
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|
2443 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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coleenp
parents:
diff
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|
2444 Metachunk* curr = chunks_in_use(i); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2445 while (curr != NULL) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2446 curr->verify(); |
7208
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
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|
2447 verify_chunk_size(curr); |
6725
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parents:
diff
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|
2448 curr = curr->next(); |
da91efe96a93
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coleenp
parents:
diff
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|
2449 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2450 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2451 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2452 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2453 |
7208
eade6b2e4782
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jmasa
parents:
7187
diff
changeset
|
2454 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2455 assert(is_humongous(chunk->word_size()) || |
7446
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2456 chunk->word_size() == medium_chunk_size() || |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2457 chunk->word_size() == small_chunk_size() || |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2458 chunk->word_size() == specialized_chunk_size(), |
7208
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2459 "Chunk size is wrong"); |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2460 return; |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2461 } |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2462 |
6725
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parents:
diff
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|
2463 #ifdef ASSERT |
10183
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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
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|
2464 void SpaceManager::verify_allocated_blocks_words() { |
6725
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coleenp
parents:
diff
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|
2465 // Verification is only guaranteed at a safepoint. |
10183
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jmasa
parents:
10175
diff
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|
2466 assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
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|
2467 "Verification can fail if the applications is running"); |
868d87ed63c8
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jmasa
parents:
10175
diff
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|
2468 assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
changeset
|
2469 err_msg("allocation total is not consistent " SIZE_FORMAT |
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
changeset
|
2470 " vs " SIZE_FORMAT, |
10183
868d87ed63c8
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jmasa
parents:
10175
diff
changeset
|
2471 allocated_blocks_words(), sum_used_in_chunks_in_use())); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2472 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2473 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2474 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2475 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2476 void SpaceManager::dump(outputStream* const out) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2477 size_t curr_total = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2478 size_t waste = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2479 uint i = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2480 size_t used = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2481 size_t capacity = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2482 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2483 // Add up statistics for all chunks in this SpaceManager. |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2484 for (ChunkIndex index = ZeroIndex; |
6885 | 2485 index < NumberOfInUseLists; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2486 index = next_chunk_index(index)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2487 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2488 curr != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2489 curr = curr->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2490 out->print("%d) ", i++); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2491 curr->print_on(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2492 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2493 block_freelists()->print_on(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2494 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2495 curr_total += curr->word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2496 used += curr->used_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2497 capacity += curr->capacity_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2498 waste += curr->free_word_size() + curr->overhead();; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2499 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2500 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2501 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2502 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2503 // Free space isn't wasted. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2504 waste -= free; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2505 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2506 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2507 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2508 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2509 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2510 |
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6969
diff
changeset
|
2511 #ifndef PRODUCT |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2512 void SpaceManager::mangle_freed_chunks() { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2513 for (ChunkIndex index = ZeroIndex; |
6885 | 2514 index < NumberOfInUseLists; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2515 index = next_chunk_index(index)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2516 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2517 curr != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2518 curr = curr->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2519 curr->mangle(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2520 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2521 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2522 } |
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6969
diff
changeset
|
2523 #endif // PRODUCT |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2524 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2525 // MetaspaceAux |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2526 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2527 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2528 size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2529 size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2530 |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2531 size_t MetaspaceAux::free_bytes(Metaspace::MetadataType mdtype) { |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2532 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
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|
2533 return list == NULL ? 0 : list->free_bytes(); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2534 } |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2535 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2536 size_t MetaspaceAux::free_bytes() { |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2537 return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2538 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2539 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2540 void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2541 assert_lock_strong(SpaceManager::expand_lock()); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2542 assert(words <= allocated_capacity_words(mdtype), |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2543 err_msg("About to decrement below 0: words " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2544 " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2545 words, mdtype, allocated_capacity_words(mdtype))); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2546 _allocated_capacity_words[mdtype] -= words; |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2547 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2548 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2549 void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2550 assert_lock_strong(SpaceManager::expand_lock()); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2551 // Needs to be atomic |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2552 _allocated_capacity_words[mdtype] += words; |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2553 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2554 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2555 void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2556 assert(words <= allocated_used_words(mdtype), |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2557 err_msg("About to decrement below 0: words " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2558 " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2559 words, mdtype, allocated_used_words(mdtype))); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2560 // For CMS deallocation of the Metaspaces occurs during the |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2561 // sweep which is a concurrent phase. Protection by the expand_lock() |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2562 // is not enough since allocation is on a per Metaspace basis |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2563 // and protected by the Metaspace lock. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2564 jlong minus_words = (jlong) - (jlong) words; |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2565 Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2566 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2567 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2568 void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2569 // _allocated_used_words tracks allocations for |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2570 // each piece of metadata. Those allocations are |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2571 // generally done concurrently by different application |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2572 // threads so must be done atomically. |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2573 Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2574 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2575 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2576 size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2577 size_t used = 0; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2578 ClassLoaderDataGraphMetaspaceIterator iter; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2579 while (iter.repeat()) { |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2580 Metaspace* msp = iter.get_next(); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2581 // Sum allocated_blocks_words for each metaspace |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2582 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2583 used += msp->used_words_slow(mdtype); |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2584 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2585 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2586 return used * BytesPerWord; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2587 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2588 |
12235 | 2589 size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2590 size_t free = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2591 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2592 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2593 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2594 if (msp != NULL) { |
12235 | 2595 free += msp->free_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2596 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2597 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2598 return free * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2599 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2600 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2601 size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2602 if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2603 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2604 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2605 // Don't count the space in the freelists. That space will be |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2606 // added to the capacity calculation as needed. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2607 size_t capacity = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2608 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2609 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2610 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2611 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2612 capacity += msp->capacity_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2613 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2614 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2615 return capacity * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2616 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2617 |
12235 | 2618 size_t MetaspaceAux::capacity_bytes_slow() { |
2619 #ifdef PRODUCT | |
2620 // Use allocated_capacity_bytes() in PRODUCT instead of this function. | |
2621 guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); | |
2622 #endif | |
2623 size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); | |
2624 size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); | |
2625 assert(allocated_capacity_bytes() == class_capacity + non_class_capacity, | |
2626 err_msg("bad accounting: allocated_capacity_bytes() " SIZE_FORMAT | |
2627 " class_capacity + non_class_capacity " SIZE_FORMAT | |
2628 " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, | |
2629 allocated_capacity_bytes(), class_capacity + non_class_capacity, | |
2630 class_capacity, non_class_capacity)); | |
2631 | |
2632 return class_capacity + non_class_capacity; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2633 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2634 |
12235 | 2635 size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
2636 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); | |
12236
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2637 return list == NULL ? 0 : list->reserved_bytes(); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2638 } |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2639 |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2640 size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2641 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2642 return list == NULL ? 0 : list->committed_bytes(); |
12235 | 2643 } |
2644 | |
2645 size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } | |
2646 | |
2647 size_t MetaspaceAux::free_chunks_total_words(Metaspace::MetadataType mdtype) { | |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2648 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2649 if (list == NULL) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2650 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2651 } |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2652 ChunkManager* chunk = list->chunk_manager(); |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2653 chunk->slow_verify(); |
12235 | 2654 return chunk->free_chunks_total_words(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2655 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2656 |
12235 | 2657 size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
2658 return free_chunks_total_words(mdtype) * BytesPerWord; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2659 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2660 |
12235 | 2661 size_t MetaspaceAux::free_chunks_total_words() { |
2662 return free_chunks_total_words(Metaspace::ClassType) + | |
2663 free_chunks_total_words(Metaspace::NonClassType); | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2664 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2665 |
12235 | 2666 size_t MetaspaceAux::free_chunks_total_bytes() { |
2667 return free_chunks_total_words() * BytesPerWord; | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2668 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2669 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2670 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2671 gclog_or_tty->print(", [Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2672 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2673 gclog_or_tty->print(" " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2674 "->" SIZE_FORMAT |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2675 "(" SIZE_FORMAT ")", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2676 prev_metadata_used, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2677 allocated_used_bytes(), |
12235 | 2678 reserved_bytes()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2679 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2680 gclog_or_tty->print(" " SIZE_FORMAT "K" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2681 "->" SIZE_FORMAT "K" |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2682 "(" SIZE_FORMAT "K)", |
12235 | 2683 prev_metadata_used/K, |
2684 allocated_used_bytes()/K, | |
2685 reserved_bytes()/K); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2686 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2687 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2688 gclog_or_tty->print("]"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2689 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2690 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2691 // This is printed when PrintGCDetails |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2692 void MetaspaceAux::print_on(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2693 Metaspace::MetadataType nct = Metaspace::NonClassType; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2694 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2695 out->print_cr(" Metaspace total " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2696 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2697 " reserved " SIZE_FORMAT "K", |
12235 | 2698 allocated_capacity_bytes()/K, allocated_used_bytes()/K, reserved_bytes()/K); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2699 |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2700 out->print_cr(" data space " |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2701 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2702 " reserved " SIZE_FORMAT "K", |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2703 allocated_capacity_bytes(nct)/K, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2704 allocated_used_bytes(nct)/K, |
12235 | 2705 reserved_bytes(nct)/K); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2706 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2707 Metaspace::MetadataType ct = Metaspace::ClassType; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2708 out->print_cr(" class space " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2709 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2710 " reserved " SIZE_FORMAT "K", |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2711 allocated_capacity_bytes(ct)/K, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2712 allocated_used_bytes(ct)/K, |
12235 | 2713 reserved_bytes(ct)/K); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2714 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2715 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2716 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2717 // Print information for class space and data space separately. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2718 // This is almost the same as above. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2719 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
12235 | 2720 size_t free_chunks_capacity_bytes = free_chunks_total_bytes(mdtype); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2721 size_t capacity_bytes = capacity_bytes_slow(mdtype); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2722 size_t used_bytes = used_bytes_slow(mdtype); |
12235 | 2723 size_t free_bytes = free_bytes_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2724 size_t used_and_free = used_bytes + free_bytes + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2725 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2726 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2727 "K + unused in chunks " SIZE_FORMAT "K + " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2728 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2729 "K capacity in allocated chunks " SIZE_FORMAT "K", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2730 used_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2731 free_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2732 free_chunks_capacity_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2733 used_and_free / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2734 capacity_bytes / K); |
8738
1c88b99a2b01
8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation
mgerdin
parents:
8040
diff
changeset
|
2735 // Accounting can only be correct if we got the values during a safepoint |
1c88b99a2b01
8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation
mgerdin
parents:
8040
diff
changeset
|
2736 assert(!SafepointSynchronize::is_at_safepoint() || used_and_free == capacity_bytes, "Accounting is wrong"); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2737 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2738 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2739 // Print total fragmentation for class metaspaces |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2740 void MetaspaceAux::print_class_waste(outputStream* out) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2741 assert(Metaspace::using_class_space(), "class metaspace not used"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2742 size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2743 size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_humongous_count = 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2744 ClassLoaderDataGraphMetaspaceIterator iter; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2745 while (iter.repeat()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2746 Metaspace* msp = iter.get_next(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2747 if (msp != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2748 cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2749 cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2750 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2751 cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2752 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2753 cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2754 cls_humongous_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2755 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2756 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2757 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2758 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2759 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2760 "large count " SIZE_FORMAT, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2761 cls_specialized_count, cls_specialized_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2762 cls_small_count, cls_small_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2763 cls_medium_count, cls_medium_waste, cls_humongous_count); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2764 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2765 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2766 // Print total fragmentation for data and class metaspaces separately |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2767 void MetaspaceAux::print_waste(outputStream* out) { |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2768 size_t specialized_waste = 0, small_waste = 0, medium_waste = 0; |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2769 size_t specialized_count = 0, small_count = 0, medium_count = 0, humongous_count = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2770 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2771 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2772 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2773 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2774 if (msp != NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2775 specialized_waste += msp->vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2776 specialized_count += msp->vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2777 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2778 small_count += msp->vsm()->sum_count_in_chunks_in_use(SmallIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2779 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2780 medium_count += msp->vsm()->sum_count_in_chunks_in_use(MediumIndex); |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2781 humongous_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2782 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2783 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2784 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2785 out->print_cr(" data: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2786 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2787 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2788 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2789 specialized_count, specialized_waste, small_count, |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2790 small_waste, medium_count, medium_waste, humongous_count); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2791 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2792 print_class_waste(out); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2793 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2794 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2795 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2796 // Dump global metaspace things from the end of ClassLoaderDataGraph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2797 void MetaspaceAux::dump(outputStream* out) { |
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|
2798 out->print_cr("All Metaspace:"); |
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|
2799 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
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2800 out->print("class space: "); print_on(out, Metaspace::ClassType); |
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|
2801 print_waste(out); |
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diff
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|
2802 } |
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|
2803 |
6969
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|
2804 void MetaspaceAux::verify_free_chunks() { |
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parents:
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|
2805 Metaspace::space_list()->chunk_manager()->verify(); |
12056
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|
2806 if (Metaspace::using_class_space()) { |
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|
2807 Metaspace::class_space_list()->chunk_manager()->verify(); |
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|
2808 } |
6969
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|
2809 } |
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|
2810 |
10183
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|
2811 void MetaspaceAux::verify_capacity() { |
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|
2812 #ifdef ASSERT |
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|
2813 size_t running_sum_capacity_bytes = allocated_capacity_bytes(); |
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|
2814 // For purposes of the running sum of capacity, verify against capacity |
10183
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|
2815 size_t capacity_in_use_bytes = capacity_bytes_slow(); |
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|
2816 assert(running_sum_capacity_bytes == capacity_in_use_bytes, |
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|
2817 err_msg("allocated_capacity_words() * BytesPerWord " SIZE_FORMAT |
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|
2818 " capacity_bytes_slow()" SIZE_FORMAT, |
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|
2819 running_sum_capacity_bytes, capacity_in_use_bytes)); |
10330
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|
2820 for (Metaspace::MetadataType i = Metaspace::ClassType; |
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8014862: Add fast Metasapce capacity and used per MetadataType
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|
2821 i < Metaspace:: MetadataTypeCount; |
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8014862: Add fast Metasapce capacity and used per MetadataType
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diff
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|
2822 i = (Metaspace::MetadataType)(i + 1)) { |
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8014862: Add fast Metasapce capacity and used per MetadataType
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diff
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|
2823 size_t capacity_in_use_bytes = capacity_bytes_slow(i); |
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|
2824 assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
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diff
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|
2825 err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
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diff
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|
2826 " capacity_bytes_slow(%u)" SIZE_FORMAT, |
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diff
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|
2827 i, allocated_capacity_bytes(i), i, capacity_in_use_bytes)); |
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diff
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|
2828 } |
10183
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parents:
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|
2829 #endif |
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parents:
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diff
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|
2830 } |
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diff
changeset
|
2831 |
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|
2832 void MetaspaceAux::verify_used() { |
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diff
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|
2833 #ifdef ASSERT |
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|
2834 size_t running_sum_used_bytes = allocated_used_bytes(); |
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|
2835 // For purposes of the running sum of used, verify against used |
10183
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|
2836 size_t used_in_use_bytes = used_bytes_slow(); |
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|
2837 assert(allocated_used_bytes() == used_in_use_bytes, |
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10175
diff
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|
2838 err_msg("allocated_used_bytes() " SIZE_FORMAT |
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diff
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|
2839 " used_bytes_slow()" SIZE_FORMAT, |
10183
868d87ed63c8
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diff
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|
2840 allocated_used_bytes(), used_in_use_bytes)); |
10330
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diff
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|
2841 for (Metaspace::MetadataType i = Metaspace::ClassType; |
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diff
changeset
|
2842 i < Metaspace:: MetadataTypeCount; |
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8014862: Add fast Metasapce capacity and used per MetadataType
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parents:
10191
diff
changeset
|
2843 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
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diff
changeset
|
2844 size_t used_in_use_bytes = used_bytes_slow(i); |
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changeset
|
2845 assert(allocated_used_bytes(i) == used_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
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diff
changeset
|
2846 err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
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8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
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|
2847 " used_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
changeset
|
2848 i, allocated_used_bytes(i), i, used_in_use_bytes)); |
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jmasa
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10191
diff
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|
2849 } |
10183
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10175
diff
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|
2850 #endif |
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10175
diff
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|
2851 } |
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diff
changeset
|
2852 |
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10175
diff
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|
2853 void MetaspaceAux::verify_metrics() { |
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parents:
10175
diff
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|
2854 verify_capacity(); |
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jmasa
parents:
10175
diff
changeset
|
2855 verify_used(); |
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parents:
10175
diff
changeset
|
2856 } |
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parents:
10175
diff
changeset
|
2857 |
868d87ed63c8
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parents:
10175
diff
changeset
|
2858 |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2859 // Metaspace methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2860 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2861 size_t Metaspace::_first_chunk_word_size = 0; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2862 size_t Metaspace::_first_class_chunk_word_size = 0; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2863 |
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
2864 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2865 initialize(lock, type); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2866 } |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2867 |
da91efe96a93
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diff
changeset
|
2868 Metaspace::~Metaspace() { |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2869 delete _vsm; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2870 if (using_class_space()) { |
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11966
diff
changeset
|
2871 delete _class_vsm; |
740e263c80c6
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11966
diff
changeset
|
2872 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2873 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2874 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2875 VirtualSpaceList* Metaspace::_space_list = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2876 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2877 |
da91efe96a93
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parents:
diff
changeset
|
2878 #define VIRTUALSPACEMULTIPLIER 2 |
da91efe96a93
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parents:
diff
changeset
|
2879 |
12056
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parents:
11966
diff
changeset
|
2880 #ifdef _LP64 |
740e263c80c6
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11966
diff
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|
2881 void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
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diff
changeset
|
2882 // Figure out the narrow_klass_base and the narrow_klass_shift. The |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2883 // narrow_klass_base is the lower of the metaspace base and the cds base |
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11966
diff
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|
2884 // (if cds is enabled). The narrow_klass_shift depends on the distance |
740e263c80c6
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11966
diff
changeset
|
2885 // between the lower base and higher address. |
740e263c80c6
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11966
diff
changeset
|
2886 address lower_base; |
740e263c80c6
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11966
diff
changeset
|
2887 address higher_address; |
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11966
diff
changeset
|
2888 if (UseSharedSpaces) { |
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11966
diff
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|
2889 higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
740e263c80c6
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diff
changeset
|
2890 (address)(metaspace_base + class_metaspace_size())); |
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11966
diff
changeset
|
2891 lower_base = MIN2(metaspace_base, cds_base); |
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11966
diff
changeset
|
2892 } else { |
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11966
diff
changeset
|
2893 higher_address = metaspace_base + class_metaspace_size(); |
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hseigel
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11966
diff
changeset
|
2894 lower_base = metaspace_base; |
740e263c80c6
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11966
diff
changeset
|
2895 } |
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11966
diff
changeset
|
2896 Universe::set_narrow_klass_base(lower_base); |
740e263c80c6
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11966
diff
changeset
|
2897 if ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint) { |
740e263c80c6
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11966
diff
changeset
|
2898 Universe::set_narrow_klass_shift(0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2899 } else { |
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11966
diff
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|
2900 assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
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11966
diff
changeset
|
2901 Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
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11966
diff
changeset
|
2902 } |
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11966
diff
changeset
|
2903 } |
740e263c80c6
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11966
diff
changeset
|
2904 |
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11966
diff
changeset
|
2905 // Return TRUE if the specified metaspace_base and cds_base are close enough |
740e263c80c6
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11966
diff
changeset
|
2906 // to work with compressed klass pointers. |
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11966
diff
changeset
|
2907 bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
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8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2908 assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2909 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
12056
740e263c80c6
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hseigel
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11966
diff
changeset
|
2910 address lower_base = MIN2((address)metaspace_base, cds_base); |
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11966
diff
changeset
|
2911 address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
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hseigel
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11966
diff
changeset
|
2912 (address)(metaspace_base + class_metaspace_size())); |
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11966
diff
changeset
|
2913 return ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint); |
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hseigel
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11966
diff
changeset
|
2914 } |
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11966
diff
changeset
|
2915 |
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diff
changeset
|
2916 // Try to allocate the metaspace at the requested addr. |
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2917 void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
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2918 assert(using_class_space(), "called improperly"); |
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2919 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
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2920 assert(class_metaspace_size() < KlassEncodingMetaspaceMax, |
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2921 "Metaspace size is too big"); |
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|
2922 |
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2923 ReservedSpace metaspace_rs = ReservedSpace(class_metaspace_size(), |
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2924 os::vm_allocation_granularity(), |
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|
2925 false, requested_addr, 0); |
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|
2926 if (!metaspace_rs.is_reserved()) { |
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|
2927 if (UseSharedSpaces) { |
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2928 // Keep trying to allocate the metaspace, increasing the requested_addr |
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2929 // by 1GB each time, until we reach an address that will no longer allow |
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2930 // use of CDS with compressed klass pointers. |
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|
2931 char *addr = requested_addr; |
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|
2932 while (!metaspace_rs.is_reserved() && (addr + 1*G > addr) && |
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2933 can_use_cds_with_metaspace_addr(addr + 1*G, cds_base)) { |
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|
2934 addr = addr + 1*G; |
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|
2935 metaspace_rs = ReservedSpace(class_metaspace_size(), |
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2936 os::vm_allocation_granularity(), false, addr, 0); |
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|
2937 } |
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|
2938 } |
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|
2939 |
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2940 // If no successful allocation then try to allocate the space anywhere. If |
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2941 // that fails then OOM doom. At this point we cannot try allocating the |
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2942 // metaspace as if UseCompressedClassPointers is off because too much |
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2943 // initialization has happened that depends on UseCompressedClassPointers. |
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2944 // So, UseCompressedClassPointers cannot be turned off at this point. |
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2945 if (!metaspace_rs.is_reserved()) { |
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2946 metaspace_rs = ReservedSpace(class_metaspace_size(), |
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2947 os::vm_allocation_granularity(), false); |
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2948 if (!metaspace_rs.is_reserved()) { |
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2949 vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
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|
2950 class_metaspace_size())); |
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|
2951 } |
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|
2952 } |
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|
2953 } |
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|
2954 |
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2955 // If we got here then the metaspace got allocated. |
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|
2956 MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
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|
2957 |
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|
2958 // Verify that we can use shared spaces. Otherwise, turn off CDS. |
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2959 if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
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|
2960 FileMapInfo::stop_sharing_and_unmap( |
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|
2961 "Could not allocate metaspace at a compatible address"); |
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|
2962 } |
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|
2963 |
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|
2964 set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
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|
2965 UseSharedSpaces ? (address)cds_base : 0); |
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|
2966 |
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|
2967 initialize_class_space(metaspace_rs); |
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|
2968 |
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|
2969 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
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|
2970 gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
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|
2971 Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
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|
2972 gclog_or_tty->print_cr("Metaspace Size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
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|
2973 class_metaspace_size(), metaspace_rs.base(), requested_addr); |
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|
2974 } |
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|
2975 } |
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|
2976 |
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|
2977 // For UseCompressedClassPointers the class space is reserved above the top of |
12056
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|
2978 // the Java heap. The argument passed in is at the base of the compressed space. |
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|
2979 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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|
2980 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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|
2981 assert(rs.size() >= CompressedClassSpaceSize, |
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|
2982 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
12056
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|
2983 assert(using_class_space(), "Must be using class space"); |
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|
2984 _class_space_list = new VirtualSpaceList(rs); |
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|
2985 } |
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|
2986 |
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diff
changeset
|
2987 #endif |
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|
2988 |
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|
2989 void Metaspace::global_initialize() { |
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diff
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|
2990 // Initialize the alignment for shared spaces. |
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|
2991 int max_alignment = os::vm_page_size(); |
12056
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|
2992 size_t cds_total = 0; |
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|
2993 |
12226
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|
2994 set_class_metaspace_size(align_size_up(CompressedClassSpaceSize, |
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|
2995 os::vm_allocation_granularity())); |
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|
2996 |
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|
2997 MetaspaceShared::set_max_alignment(max_alignment); |
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|
2998 |
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2999 if (DumpSharedSpaces) { |
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|
3000 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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3001 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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3002 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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3003 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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|
3004 |
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|
3005 // Initialize with the sum of the shared space sizes. The read-only |
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3006 // and read write metaspace chunks will be allocated out of this and the |
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3007 // remainder is the misc code and data chunks. |
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|
3008 cds_total = FileMapInfo::shared_spaces_size(); |
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|
3009 _space_list = new VirtualSpaceList(cds_total/wordSize); |
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|
3010 |
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diff
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|
3011 #ifdef _LP64 |
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|
3012 // Set the compressed klass pointer base so that decoding of these pointers works |
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|
3013 // properly when creating the shared archive. |
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|
3014 assert(UseCompressedOops && UseCompressedClassPointers, |
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|
3015 "UseCompressedOops and UseCompressedClassPointers must be set"); |
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|
3016 Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
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|
3017 if (TraceMetavirtualspaceAllocation && Verbose) { |
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|
3018 gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
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|
3019 _space_list->current_virtual_space()->bottom()); |
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|
3020 } |
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|
3021 |
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diff
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|
3022 // Set the shift to zero. |
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|
3023 assert(class_metaspace_size() < (uint64_t)(max_juint) - cds_total, |
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|
3024 "CDS region is too large"); |
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|
3025 Universe::set_narrow_klass_shift(0); |
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|
3026 #endif |
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|
3027 |
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|
3028 } else { |
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|
3029 // If using shared space, open the file that contains the shared space |
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|
3030 // and map in the memory before initializing the rest of metaspace (so |
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3031 // the addresses don't conflict) |
12056
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|
3032 address cds_address = NULL; |
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|
3033 if (UseSharedSpaces) { |
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|
3034 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
3035 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
3036 |
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|
3037 // Open the shared archive file, read and validate the header. If |
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|
3038 // initialization fails, shared spaces [UseSharedSpaces] are |
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changeset
|
3039 // disabled and the file is closed. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3040 // Map in spaces now also |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3041 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3042 FileMapInfo::set_current_info(mapinfo); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3043 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3044 assert(!mapinfo->is_open() && !UseSharedSpaces, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3045 "archive file not closed or shared spaces not disabled."); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3046 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3047 cds_total = FileMapInfo::shared_spaces_size(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3048 cds_address = (address)mapinfo->region_base(0); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3049 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3050 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3051 #ifdef _LP64 |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3052 // If UseCompressedClassPointers is set then allocate the metaspace area |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3053 // above the heap and above the CDS area (if it exists). |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3054 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3055 if (UseSharedSpaces) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3056 allocate_metaspace_compressed_klass_ptrs((char *)(cds_address + cds_total), cds_address); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3057 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3058 allocate_metaspace_compressed_klass_ptrs((char *)CompressedKlassPointersBase, 0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3059 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3060 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3061 #endif |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3062 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3063 // Initialize these before initializing the VirtualSpaceList |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3064 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3065 _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3066 // Make the first class chunk bigger than a medium chunk so it's not put |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3067 // on the medium chunk list. The next chunk will be small and progress |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3068 // from there. This size calculated by -version. |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3069 _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3070 (CompressedClassSpaceSize/BytesPerWord)*2); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3071 _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3072 // Arbitrarily set the initial virtual space to a multiple |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3073 // of the boot class loader size. |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3074 size_t word_size = VIRTUALSPACEMULTIPLIER * first_chunk_word_size(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3075 // Initialize the list of virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3076 _space_list = new VirtualSpaceList(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3077 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3078 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3079 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3080 void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3081 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3082 assert(space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3083 "Metadata VirtualSpaceList has not been initialized"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3084 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3085 _vsm = new SpaceManager(NonClassType, lock, space_list()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3086 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3087 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3088 } |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3089 size_t word_size; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3090 size_t class_word_size; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3091 vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3092 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3093 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3094 assert(class_space_list() != NULL, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3095 "Class VirtualSpaceList has not been initialized"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3096 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3097 // Allocate SpaceManager for classes. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3098 _class_vsm = new SpaceManager(ClassType, lock, class_space_list()); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3099 if (_class_vsm == NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3100 return; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3101 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3102 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3103 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3104 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3105 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3106 // Allocate chunk for metadata objects |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3107 Metachunk* new_chunk = |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3108 space_list()->get_initialization_chunk(word_size, |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3109 vsm()->medium_chunk_bunch()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3110 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3111 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3112 // Add to this manager's list of chunks in use and current_chunk(). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3113 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3114 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3115 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3116 // Allocate chunk for class metadata objects |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3117 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3118 Metachunk* class_chunk = |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3119 class_space_list()->get_initialization_chunk(class_word_size, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3120 class_vsm()->medium_chunk_bunch()); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3121 if (class_chunk != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3122 class_vsm()->add_chunk(class_chunk, true); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3123 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3124 } |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3125 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3126 _alloc_record_head = NULL; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3127 _alloc_record_tail = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3128 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3129 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3130 size_t Metaspace::align_word_size_up(size_t word_size) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3131 size_t byte_size = word_size * wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3132 return ReservedSpace::allocation_align_size_up(byte_size) / wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3133 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3134 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3135 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3136 // DumpSharedSpaces doesn't use class metadata area (yet) |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3137 // Also, don't use class_vsm() unless UseCompressedClassPointers is true. |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3138 if (mdtype == ClassType && using_class_space()) { |
6885 | 3139 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3140 } else { |
6885 | 3141 return vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3142 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3143 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3144 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3145 MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3146 MetaWord* result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3147 MetaspaceGC::set_expand_after_GC(true); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3148 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3149 size_t delta_bytes = MetaspaceGC::delta_capacity_until_GC(word_size) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3150 MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3151 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3152 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3153 " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3154 } |
6885 | 3155 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3156 result = allocate(word_size, mdtype); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3157 |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3158 return result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3159 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3160 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3161 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3162 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3163 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3164 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3165 return (char*)vsm()->current_chunk()->bottom(); |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3166 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3167 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
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10175
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|
3168 size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
12056
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8003424: Enable Class Data Sharing for CompressedOops
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diff
changeset
|
3169 if (mdtype == ClassType) { |
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8003424: Enable Class Data Sharing for CompressedOops
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parents:
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diff
changeset
|
3170 return using_class_space() ? class_vsm()->sum_used_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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parents:
11966
diff
changeset
|
3171 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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parents:
11966
diff
changeset
|
3172 return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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diff
changeset
|
3173 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3174 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3175 |
12235 | 3176 size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
12056
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8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3177 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3178 return using_class_space() ? class_vsm()->sum_free_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
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diff
changeset
|
3179 } else { |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3180 return vsm()->sum_free_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3181 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3182 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3183 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3184 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3185 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3186 // have been made. Don't include space in the global freelist and |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3187 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3188 // is already counted in some chunk. |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
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|
3189 size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
12056
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hseigel
parents:
11966
diff
changeset
|
3190 if (mdtype == ClassType) { |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3191 return using_class_space() ? class_vsm()->sum_capacity_in_chunks_in_use() : 0; |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3192 } else { |
740e263c80c6
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hseigel
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11966
diff
changeset
|
3193 return vsm()->sum_capacity_in_chunks_in_use(); |
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hseigel
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11966
diff
changeset
|
3194 } |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3195 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
3196 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3197 size_t Metaspace::used_bytes_slow(MetadataType mdtype) const { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
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|
3198 return used_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
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jmasa
parents:
10175
diff
changeset
|
3199 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3200 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3201 size_t Metaspace::capacity_bytes_slow(MetadataType mdtype) const { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3202 return capacity_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3203 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3204 |
6725
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coleenp
parents:
diff
changeset
|
3205 void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3206 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3207 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 3208 // Don't take Heap_lock |
10191
601183f604b2
8013129: Possible deadlock with Metaspace locks due to mixed usage of safepoint aware and non-safepoint aware locking
mgerdin
parents:
10183
diff
changeset
|
3209 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6885 | 3210 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3211 // Dark matter. Too small for dictionary. | |
3212 #ifdef ASSERT | |
3213 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3214 #endif | |
3215 return; | |
6725
da91efe96a93
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parents:
diff
changeset
|
3216 } |
12056
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11966
diff
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|
3217 if (is_class && using_class_space()) { |
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hseigel
parents:
11966
diff
changeset
|
3218 class_vsm()->deallocate(ptr, word_size); |
6885 | 3219 } else { |
3220 vsm()->deallocate(ptr, word_size); | |
3221 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3222 } else { |
10191
601183f604b2
8013129: Possible deadlock with Metaspace locks due to mixed usage of safepoint aware and non-safepoint aware locking
mgerdin
parents:
10183
diff
changeset
|
3223 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6725
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coleenp
parents:
diff
changeset
|
3224 |
6885 | 3225 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3226 // Dark matter. Too small for dictionary. | |
3227 #ifdef ASSERT | |
3228 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3229 #endif | |
3230 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3231 } |
12056
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hseigel
parents:
11966
diff
changeset
|
3232 if (is_class && using_class_space()) { |
6885 | 3233 class_vsm()->deallocate(ptr, word_size); |
3234 } else { | |
3235 vsm()->deallocate(ptr, word_size); | |
3236 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3237 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3238 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3239 |
6885 | 3240 Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3241 bool read_only, MetaspaceObj::Type type, TRAPS) { |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3242 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3243 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3244 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3245 } |
da91efe96a93
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parents:
diff
changeset
|
3246 |
10376
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iklam
parents:
10330
diff
changeset
|
3247 MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3248 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3249 // SSS: Should we align the allocations and make sure the sizes are aligned. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3250 MetaWord* result = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3251 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3252 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3253 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
3254 // Allocate in metaspaces without taking out a lock, because it deadlocks |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3255 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3256 // to revisit this for application class data sharing. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3257 if (DumpSharedSpaces) { |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3258 assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3259 Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3260 result = space->allocate(word_size, NonClassType); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3261 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3262 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3263 } else { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3264 space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3265 } |
6885 | 3266 return Metablock::initialize(result, word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3267 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3268 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3269 result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3270 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3271 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3272 // Try to clean out some memory and retry. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3273 result = |
6885 | 3274 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3275 loader_data, word_size, mdtype); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
3276 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3277 // If result is still null, we are out of memory. |
da91efe96a93
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coleenp
parents:
diff
changeset
|
3278 if (result == NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3279 if (Verbose && TraceMetadataChunkAllocation) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3280 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3281 SIZE_FORMAT, word_size); |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3282 if (loader_data->metaspace_or_null() != NULL) loader_data->dump(gclog_or_tty); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3283 MetaspaceAux::dump(gclog_or_tty); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3284 } |
6725
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coleenp
parents:
diff
changeset
|
3285 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3286 const char* space_string = (mdtype == ClassType) ? "Compressed class space" : |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3287 "Metadata space"; |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3288 report_java_out_of_memory(space_string); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3289 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3290 if (JvmtiExport::should_post_resource_exhausted()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3291 JvmtiExport::post_resource_exhausted( |
da91efe96a93
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coleenp
parents:
diff
changeset
|
3292 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3293 space_string); |
6725
da91efe96a93
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coleenp
parents:
diff
changeset
|
3294 } |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3295 if (mdtype == ClassType) { |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3296 THROW_OOP_0(Universe::out_of_memory_error_class_metaspace()); |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3297 } else { |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
3298 THROW_OOP_0(Universe::out_of_memory_error_metaspace()); |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
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10376
diff
changeset
|
3299 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3300 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3301 } |
6885 | 3302 return Metablock::initialize(result, word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3303 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3304 |
10376
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3305 void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
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3306 assert(DumpSharedSpaces, "sanity"); |
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3307 |
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3308 AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
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3309 if (_alloc_record_head == NULL) { |
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3310 _alloc_record_head = _alloc_record_tail = rec; |
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3311 } else { |
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3312 _alloc_record_tail->_next = rec; |
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3313 _alloc_record_tail = rec; |
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3314 } |
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3315 } |
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3316 |
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3317 void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
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3318 assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
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3319 |
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3320 address last_addr = (address)bottom(); |
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3321 |
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3322 for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
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3323 address ptr = rec->_ptr; |
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3324 if (last_addr < ptr) { |
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3325 closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
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3326 } |
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3327 closure->doit(ptr, rec->_type, rec->_byte_size); |
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3328 last_addr = ptr + rec->_byte_size; |
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3329 } |
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3330 |
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3331 address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
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3332 if (last_addr < top) { |
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3333 closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
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3334 } |
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3335 } |
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3336 |
10175 | 3337 void Metaspace::purge() { |
3338 MutexLockerEx cl(SpaceManager::expand_lock(), | |
3339 Mutex::_no_safepoint_check_flag); | |
3340 space_list()->purge(); | |
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3341 if (using_class_space()) { |
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3342 class_space_list()->purge(); |
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3343 } |
10175 | 3344 } |
3345 | |
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3346 void Metaspace::print_on(outputStream* out) const { |
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3347 // Print both class virtual space counts and metaspace. |
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3348 if (Verbose) { |
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3349 vsm()->print_on(out); |
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3350 if (using_class_space()) { |
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3351 class_vsm()->print_on(out); |
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3352 } |
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3353 } |
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3354 } |
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3355 |
7176
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|
3356 bool Metaspace::contains(const void * ptr) { |
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3357 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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3358 return true; |
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3359 } |
7176
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3360 // This is checked while unlocked. As long as the virtualspaces are added |
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3361 // at the end, the pointer will be in one of them. The virtual spaces |
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3362 // aren't deleted presently. When they are, some sort of locking might |
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3363 // be needed. Note, locking this can cause inversion problems with the |
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3364 // caller in MetaspaceObj::is_metadata() function. |
10175 | 3365 return space_list()->contains(ptr) || |
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3366 (using_class_space() && class_space_list()->contains(ptr)); |
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3367 } |
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3368 |
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3369 void Metaspace::verify() { |
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|
3370 vsm()->verify(); |
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3371 if (using_class_space()) { |
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3372 class_vsm()->verify(); |
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3373 } |
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3374 } |
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3375 |
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3376 void Metaspace::dump(outputStream* const out) const { |
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3377 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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3378 vsm()->dump(out); |
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|
3379 if (using_class_space()) { |
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|
3380 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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|
3381 class_vsm()->dump(out); |
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|
3382 } |
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|
3383 } |
12236
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3384 |
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3385 /////////////// Unit tests /////////////// |
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3386 |
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|
3387 #ifndef PRODUCT |
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3388 |
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3389 class MetaspaceAuxTest : AllStatic { |
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|
3390 public: |
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|
3391 static void test_reserved() { |
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3392 size_t reserved = MetaspaceAux::reserved_bytes(); |
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3393 |
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|
3394 assert(reserved > 0, "assert"); |
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|
3395 |
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3396 size_t committed = MetaspaceAux::committed_bytes(); |
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|
3397 assert(committed <= reserved, "assert"); |
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|
3398 |
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3399 size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
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3400 assert(reserved_metadata > 0, "assert"); |
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|
3401 assert(reserved_metadata <= reserved, "assert"); |
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|
3402 |
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3403 if (UseCompressedClassPointers) { |
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3404 size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
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|
3405 assert(reserved_class > 0, "assert"); |
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3406 assert(reserved_class < reserved, "assert"); |
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|
3407 } |
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|
3408 } |
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|
3409 |
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|
3410 static void test_committed() { |
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3411 size_t committed = MetaspaceAux::committed_bytes(); |
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3412 |
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|
3413 assert(committed > 0, "assert"); |
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3414 |
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|
3415 size_t reserved = MetaspaceAux::reserved_bytes(); |
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|
3416 assert(committed <= reserved, "assert"); |
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3417 |
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3418 size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
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3419 assert(committed_metadata > 0, "assert"); |
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3420 assert(committed_metadata <= committed, "assert"); |
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3421 |
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|
3422 if (UseCompressedClassPointers) { |
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3423 size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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3424 assert(committed_class > 0, "assert"); |
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3425 assert(committed_class < committed, "assert"); |
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|
3426 } |
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|
3427 } |
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|
3428 |
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|
3429 static void test() { |
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|
3430 test_reserved(); |
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|
3431 test_committed(); |
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|
3432 } |
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|
3433 }; |
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|
3434 |
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|
3435 void MetaspaceAux_test() { |
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3436 MetaspaceAuxTest::test(); |
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3437 } |
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3438 |
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8024638: Count and expose the amount of committed memory in the metaspaces
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3439 #endif |