Mercurial > hg > graal-compiler
annotate src/share/vm/memory/metaspace.cpp @ 10101:df254344edf1
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Reviewed-by: mgerdin, tschatzl, johnc, coleenp
author | jmasa |
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date | Mon, 01 Apr 2013 10:50:30 -0700 |
parents | 6574f999e0cf |
children | c23dbf0e8ab7 |
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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/mutex.hpp" |
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39 #include "runtime/orderAccess.hpp" |
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40 #include "services/memTracker.hpp" |
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41 #include "utilities/copy.hpp" |
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42 #include "utilities/debug.hpp" |
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43 |
6885 | 44 typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
45 typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; | |
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46 // Define this macro to enable slow integrity checking of |
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47 // the free chunk lists |
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48 const bool metaspace_slow_verify = false; |
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49 |
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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 = 64 * 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 // Used in declarations in SpaceManager and ChunkManager |
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59 enum ChunkIndex { |
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60 ZeroIndex = 0, |
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61 SpecializedIndex = ZeroIndex, |
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62 SmallIndex = SpecializedIndex + 1, |
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63 MediumIndex = SmallIndex + 1, |
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64 HumongousIndex = MediumIndex + 1, |
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65 NumberOfFreeLists = 3, |
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66 NumberOfInUseLists = 4 |
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67 }; |
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68 |
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69 enum ChunkSizes { // in words. |
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70 ClassSpecializedChunk = 128, |
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71 SpecializedChunk = 128, |
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72 ClassSmallChunk = 256, |
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73 SmallChunk = 512, |
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74 ClassMediumChunk = 1 * K, |
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75 MediumChunk = 8 * K, |
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76 HumongousChunkGranularity = 8 |
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77 }; |
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78 |
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79 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 80 assert(i < NumberOfInUseLists, "Out of bound"); |
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81 return (ChunkIndex) (i+1); |
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82 } |
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83 |
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84 // Originally _capacity_until_GC was set to MetaspaceSize here but |
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85 // the default MetaspaceSize before argument processing was being |
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86 // used which was not the desired value. See the code |
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87 // in should_expand() to see how the initialization is handled |
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88 // now. |
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89 size_t MetaspaceGC::_capacity_until_GC = 0; |
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90 bool MetaspaceGC::_expand_after_GC = false; |
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91 uint MetaspaceGC::_shrink_factor = 0; |
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92 bool MetaspaceGC::_should_concurrent_collect = false; |
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93 |
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94 // Blocks of space for metadata are allocated out of Metachunks. |
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95 // |
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96 // Metachunk are allocated out of MetadataVirtualspaces and once |
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97 // allocated there is no explicit link between a Metachunk and |
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98 // the MetadataVirtualspaces from which it was allocated. |
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99 // |
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100 // Each SpaceManager maintains a |
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101 // list of the chunks it is using and the current chunk. The current |
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102 // chunk is the chunk from which allocations are done. Space freed in |
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103 // a chunk is placed on the free list of blocks (BlockFreelist) and |
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104 // reused from there. |
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105 |
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106 typedef class FreeList<Metachunk> ChunkList; |
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107 |
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108 // Manages the global free lists of chunks. |
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109 // Has three lists of free chunks, and a total size and |
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110 // count that includes all three |
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111 |
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112 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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113 |
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114 // Free list of chunks of different sizes. |
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115 // SmallChunk |
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116 // MediumChunk |
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117 // HumongousChunk |
6885 | 118 ChunkList _free_chunks[NumberOfFreeLists]; |
119 | |
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120 |
6885 | 121 // HumongousChunk |
122 ChunkTreeDictionary _humongous_dictionary; | |
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123 |
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124 // ChunkManager in all lists of this type |
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125 size_t _free_chunks_total; |
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126 size_t _free_chunks_count; |
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127 |
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128 void dec_free_chunks_total(size_t v) { |
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129 assert(_free_chunks_count > 0 && |
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130 _free_chunks_total > 0, |
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131 "About to go negative"); |
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132 Atomic::add_ptr(-1, &_free_chunks_count); |
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133 jlong minus_v = (jlong) - (jlong) v; |
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134 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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135 } |
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136 |
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137 // Debug support |
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138 |
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139 size_t sum_free_chunks(); |
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140 size_t sum_free_chunks_count(); |
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141 |
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142 void locked_verify_free_chunks_total(); |
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143 void slow_locked_verify_free_chunks_total() { |
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144 if (metaspace_slow_verify) { |
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145 locked_verify_free_chunks_total(); |
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146 } |
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147 } |
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148 void locked_verify_free_chunks_count(); |
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149 void slow_locked_verify_free_chunks_count() { |
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150 if (metaspace_slow_verify) { |
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151 locked_verify_free_chunks_count(); |
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152 } |
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153 } |
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154 void verify_free_chunks_count(); |
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155 |
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156 public: |
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157 |
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158 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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159 |
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160 // add or delete (return) a chunk to the global freelist. |
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161 Metachunk* chunk_freelist_allocate(size_t word_size); |
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162 void chunk_freelist_deallocate(Metachunk* chunk); |
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163 |
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164 // Map a size to a list index assuming that there are lists |
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165 // for special, small, medium, and humongous chunks. |
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166 static ChunkIndex list_index(size_t size); |
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167 |
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168 // Add the simple linked list of chunks to the freelist of chunks |
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169 // of type index. |
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170 void return_chunks(ChunkIndex index, Metachunk* chunks); |
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171 |
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172 // Total of the space in the free chunks list |
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173 size_t free_chunks_total(); |
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174 size_t free_chunks_total_in_bytes(); |
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175 |
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176 // Number of chunks in the free chunks list |
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177 size_t free_chunks_count(); |
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178 |
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179 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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180 Atomic::add_ptr(count, &_free_chunks_count); |
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181 Atomic::add_ptr(v, &_free_chunks_total); |
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182 } |
6885 | 183 ChunkTreeDictionary* humongous_dictionary() { |
184 return &_humongous_dictionary; | |
185 } | |
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186 |
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187 ChunkList* free_chunks(ChunkIndex index); |
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188 |
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189 // Returns the list for the given chunk word size. |
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190 ChunkList* find_free_chunks_list(size_t word_size); |
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191 |
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192 // Add and remove from a list by size. Selects |
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193 // list based on size of chunk. |
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194 void free_chunks_put(Metachunk* chuck); |
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195 Metachunk* free_chunks_get(size_t chunk_word_size); |
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196 |
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197 // Debug support |
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198 void verify(); |
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199 void slow_verify() { |
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200 if (metaspace_slow_verify) { |
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201 verify(); |
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202 } |
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203 } |
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204 void locked_verify(); |
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205 void slow_locked_verify() { |
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206 if (metaspace_slow_verify) { |
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207 locked_verify(); |
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208 } |
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209 } |
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210 void verify_free_chunks_total(); |
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211 |
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212 void locked_print_free_chunks(outputStream* st); |
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213 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 214 |
215 void print_on(outputStream* st); | |
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216 }; |
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217 |
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218 |
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219 // Used to manage the free list of Metablocks (a block corresponds |
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220 // to the allocation of a quantum of metadata). |
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221 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 222 BlockTreeDictionary* _dictionary; |
223 static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); | |
224 | |
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225 // Accessors |
6885 | 226 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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227 |
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228 public: |
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229 BlockFreelist(); |
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230 ~BlockFreelist(); |
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231 |
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232 // Get and return a block to the free list |
6885 | 233 MetaWord* get_block(size_t word_size); |
234 void return_block(MetaWord* p, size_t word_size); | |
235 | |
236 size_t total_size() { | |
237 if (dictionary() == NULL) { | |
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238 return 0; |
6885 | 239 } else { |
240 return dictionary()->total_size(); | |
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241 } |
6885 | 242 } |
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243 |
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244 void print_on(outputStream* st) const; |
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245 }; |
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246 |
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247 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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248 friend class VirtualSpaceList; |
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249 |
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250 // Link to next VirtualSpaceNode |
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251 VirtualSpaceNode* _next; |
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252 |
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253 // total in the VirtualSpace |
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254 MemRegion _reserved; |
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255 ReservedSpace _rs; |
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256 VirtualSpace _virtual_space; |
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257 MetaWord* _top; |
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258 |
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259 // Convenience functions for logical bottom and end |
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260 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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261 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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262 |
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263 // Convenience functions to access the _virtual_space |
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264 char* low() const { return virtual_space()->low(); } |
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265 char* high() const { return virtual_space()->high(); } |
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266 |
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267 public: |
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268 |
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269 VirtualSpaceNode(size_t byte_size); |
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270 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs) {} |
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271 ~VirtualSpaceNode(); |
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272 |
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273 // address of next available space in _virtual_space; |
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274 // Accessors |
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275 VirtualSpaceNode* next() { return _next; } |
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276 void set_next(VirtualSpaceNode* v) { _next = v; } |
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277 |
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278 void set_reserved(MemRegion const v) { _reserved = v; } |
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279 void set_top(MetaWord* v) { _top = v; } |
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280 |
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281 // Accessors |
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282 MemRegion* reserved() { return &_reserved; } |
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283 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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284 |
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285 // Returns true if "word_size" is available in the virtual space |
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286 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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287 |
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288 MetaWord* top() const { return _top; } |
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289 void inc_top(size_t word_size) { _top += word_size; } |
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290 |
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291 // used and capacity in this single entry in the list |
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292 size_t used_words_in_vs() const; |
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293 size_t capacity_words_in_vs() const; |
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294 |
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295 bool initialize(); |
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296 |
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297 // get space from the virtual space |
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298 Metachunk* take_from_committed(size_t chunk_word_size); |
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299 |
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300 // Allocate a chunk from the virtual space and return it. |
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301 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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302 Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
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303 |
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304 // Expands/shrinks the committed space in a virtual space. Delegates |
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305 // to Virtualspace |
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306 bool expand_by(size_t words, bool pre_touch = false); |
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307 bool shrink_by(size_t words); |
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308 |
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309 #ifdef ASSERT |
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310 // Debug support |
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311 static void verify_virtual_space_total(); |
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312 static void verify_virtual_space_count(); |
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313 void mangle(); |
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314 #endif |
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315 |
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316 void print_on(outputStream* st) const; |
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317 }; |
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318 |
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319 // byte_size is the size of the associated virtualspace. |
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320 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0) { |
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321 // align up to vm allocation granularity |
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322 byte_size = align_size_up(byte_size, os::vm_allocation_granularity()); |
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323 |
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324 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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325 // configurable address, generally at the top of the Java heap so other |
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326 // memory addresses don't conflict. |
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327 if (DumpSharedSpaces) { |
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328 char* shared_base = (char*)SharedBaseAddress; |
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329 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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330 if (_rs.is_reserved()) { |
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331 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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332 } else { |
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333 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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334 _rs = ReservedSpace(byte_size); |
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335 } |
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336 MetaspaceShared::set_shared_rs(&_rs); |
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337 } else { |
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338 _rs = ReservedSpace(byte_size); |
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339 } |
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340 |
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341 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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342 } |
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343 |
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344 // List of VirtualSpaces for metadata allocation. |
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345 // It has a _next link for singly linked list and a MemRegion |
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346 // for total space in the VirtualSpace. |
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347 class VirtualSpaceList : public CHeapObj<mtClass> { |
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348 friend class VirtualSpaceNode; |
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349 |
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350 enum VirtualSpaceSizes { |
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351 VirtualSpaceSize = 256 * K |
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352 }; |
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353 |
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354 // Global list of virtual spaces |
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355 // Head of the list |
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356 VirtualSpaceNode* _virtual_space_list; |
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357 // virtual space currently being used for allocations |
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358 VirtualSpaceNode* _current_virtual_space; |
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359 // Free chunk list for all other metadata |
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360 ChunkManager _chunk_manager; |
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361 |
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362 // Can this virtual list allocate >1 spaces? Also, used to determine |
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363 // whether to allocate unlimited small chunks in this virtual space |
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364 bool _is_class; |
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365 bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
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366 |
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367 // Sum of space in all virtual spaces and number of virtual spaces |
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368 size_t _virtual_space_total; |
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369 size_t _virtual_space_count; |
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370 |
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371 ~VirtualSpaceList(); |
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372 |
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373 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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374 |
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375 void set_virtual_space_list(VirtualSpaceNode* v) { |
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376 _virtual_space_list = v; |
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377 } |
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378 void set_current_virtual_space(VirtualSpaceNode* v) { |
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379 _current_virtual_space = v; |
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380 } |
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381 |
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382 void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
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383 |
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384 // Get another virtual space and add it to the list. This |
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385 // is typically prompted by a failed attempt to allocate a chunk |
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386 // and is typically followed by the allocation of a chunk. |
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387 bool grow_vs(size_t vs_word_size); |
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388 |
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389 public: |
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390 VirtualSpaceList(size_t word_size); |
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391 VirtualSpaceList(ReservedSpace rs); |
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392 |
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393 Metachunk* get_new_chunk(size_t word_size, |
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394 size_t grow_chunks_by_words, |
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395 size_t medium_chunk_bunch); |
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396 |
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397 // Get the first chunk for a Metaspace. Used for |
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398 // special cases such as the boot class loader, reflection |
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399 // class loader and anonymous class loader. |
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400 Metachunk* get_initialization_chunk(size_t word_size, size_t chunk_bunch); |
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401 |
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402 VirtualSpaceNode* current_virtual_space() { |
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403 return _current_virtual_space; |
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404 } |
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405 |
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406 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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407 bool is_class() const { return _is_class; } |
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408 |
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409 // Allocate the first virtualspace. |
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410 void initialize(size_t word_size); |
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411 |
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412 size_t virtual_space_total() { return _virtual_space_total; } |
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413 void inc_virtual_space_total(size_t v) { |
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414 Atomic::add_ptr(v, &_virtual_space_total); |
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415 } |
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416 |
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417 size_t virtual_space_count() { return _virtual_space_count; } |
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418 void inc_virtual_space_count() { |
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419 Atomic::inc_ptr(&_virtual_space_count); |
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420 } |
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421 |
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422 // Used and capacity in the entire list of virtual spaces. |
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423 // These are global values shared by all Metaspaces |
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424 size_t capacity_words_sum(); |
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425 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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426 size_t used_words_sum(); |
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427 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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428 |
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429 bool contains(const void *ptr); |
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430 |
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431 void print_on(outputStream* st) const; |
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432 |
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433 class VirtualSpaceListIterator : public StackObj { |
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434 VirtualSpaceNode* _virtual_spaces; |
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435 public: |
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436 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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437 _virtual_spaces(virtual_spaces) {} |
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438 |
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439 bool repeat() { |
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440 return _virtual_spaces != NULL; |
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441 } |
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442 |
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443 VirtualSpaceNode* get_next() { |
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444 VirtualSpaceNode* result = _virtual_spaces; |
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445 if (_virtual_spaces != NULL) { |
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446 _virtual_spaces = _virtual_spaces->next(); |
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447 } |
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448 return result; |
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449 } |
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450 }; |
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451 }; |
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452 |
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453 class Metadebug : AllStatic { |
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454 // Debugging support for Metaspaces |
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455 static int _deallocate_block_a_lot_count; |
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456 static int _deallocate_chunk_a_lot_count; |
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457 static int _allocation_fail_alot_count; |
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458 |
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459 public: |
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460 static int deallocate_block_a_lot_count() { |
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461 return _deallocate_block_a_lot_count; |
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462 } |
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463 static void set_deallocate_block_a_lot_count(int v) { |
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464 _deallocate_block_a_lot_count = v; |
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465 } |
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466 static void inc_deallocate_block_a_lot_count() { |
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467 _deallocate_block_a_lot_count++; |
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468 } |
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469 static int deallocate_chunk_a_lot_count() { |
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470 return _deallocate_chunk_a_lot_count; |
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471 } |
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472 static void reset_deallocate_chunk_a_lot_count() { |
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473 _deallocate_chunk_a_lot_count = 1; |
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474 } |
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475 static void inc_deallocate_chunk_a_lot_count() { |
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476 _deallocate_chunk_a_lot_count++; |
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477 } |
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478 |
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479 static void init_allocation_fail_alot_count(); |
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480 #ifdef ASSERT |
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481 static bool test_metadata_failure(); |
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482 #endif |
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483 |
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484 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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485 size_t chunk_word_size); |
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486 static void deallocate_block_a_lot(SpaceManager* sm, |
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487 size_t chunk_word_size); |
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488 |
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489 }; |
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490 |
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491 int Metadebug::_deallocate_block_a_lot_count = 0; |
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492 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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493 int Metadebug::_allocation_fail_alot_count = 0; |
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494 |
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495 // SpaceManager - used by Metaspace to handle allocations |
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496 class SpaceManager : public CHeapObj<mtClass> { |
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497 friend class Metaspace; |
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498 friend class Metadebug; |
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499 |
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500 private: |
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501 |
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502 // protects allocations and contains. |
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503 Mutex* const _lock; |
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504 |
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505 // Chunk related size |
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506 size_t _medium_chunk_bunch; |
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507 |
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508 // List of chunks in use by this SpaceManager. Allocations |
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509 // are done from the current chunk. The list is used for deallocating |
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510 // chunks when the SpaceManager is freed. |
6885 | 511 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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512 Metachunk* _current_chunk; |
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513 |
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514 // Virtual space where allocation comes from. |
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515 VirtualSpaceList* _vs_list; |
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516 |
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517 // Number of small chunks to allocate to a manager |
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518 // If class space manager, small chunks are unlimited |
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519 static uint const _small_chunk_limit; |
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520 bool has_small_chunk_limit() { return !vs_list()->is_class(); } |
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521 |
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522 // Sum of all space in allocated chunks |
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523 size_t _allocation_total; |
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524 |
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525 // Free lists of blocks are per SpaceManager since they |
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526 // are assumed to be in chunks in use by the SpaceManager |
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527 // and all chunks in use by a SpaceManager are freed when |
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528 // the class loader using the SpaceManager is collected. |
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529 BlockFreelist _block_freelists; |
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530 |
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531 // protects virtualspace and chunk expansions |
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532 static const char* _expand_lock_name; |
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533 static const int _expand_lock_rank; |
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534 static Mutex* const _expand_lock; |
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535 |
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536 private: |
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537 // Accessors |
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538 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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539 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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540 |
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541 BlockFreelist* block_freelists() const { |
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542 return (BlockFreelist*) &_block_freelists; |
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543 } |
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544 |
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545 VirtualSpaceList* vs_list() const { return _vs_list; } |
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546 |
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547 Metachunk* current_chunk() const { return _current_chunk; } |
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548 void set_current_chunk(Metachunk* v) { |
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549 _current_chunk = v; |
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550 } |
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551 |
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552 Metachunk* find_current_chunk(size_t word_size); |
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553 |
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554 // Add chunk to the list of chunks in use |
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555 void add_chunk(Metachunk* v, bool make_current); |
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556 |
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557 Mutex* lock() const { return _lock; } |
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558 |
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559 const char* chunk_size_name(ChunkIndex index) const; |
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560 |
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561 protected: |
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562 void initialize(); |
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563 |
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564 public: |
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565 SpaceManager(Mutex* lock, |
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566 VirtualSpaceList* vs_list); |
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567 ~SpaceManager(); |
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568 |
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569 enum ChunkMultiples { |
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570 MediumChunkMultiple = 4 |
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571 }; |
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572 |
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573 // Accessors |
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574 size_t specialized_chunk_size() { return SpecializedChunk; } |
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575 size_t small_chunk_size() { return (size_t) vs_list()->is_class() ? ClassSmallChunk : SmallChunk; } |
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576 size_t medium_chunk_size() { return (size_t) vs_list()->is_class() ? ClassMediumChunk : MediumChunk; } |
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577 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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578 |
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579 size_t allocation_total() const { return _allocation_total; } |
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580 void inc_allocation_total(size_t v) { Atomic::add_ptr(v, &_allocation_total); } |
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581 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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582 |
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583 static Mutex* expand_lock() { return _expand_lock; } |
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584 |
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585 // Set the sizes for the initial chunks. |
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586 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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587 size_t* chunk_word_size, |
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588 size_t* class_chunk_word_size); |
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589 |
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590 size_t sum_capacity_in_chunks_in_use() const; |
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591 size_t sum_used_in_chunks_in_use() const; |
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592 size_t sum_free_in_chunks_in_use() const; |
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593 size_t sum_waste_in_chunks_in_use() const; |
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594 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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595 |
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596 size_t sum_count_in_chunks_in_use(); |
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597 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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598 |
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599 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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600 |
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601 // Block allocation and deallocation. |
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602 // Allocates a block from the current chunk |
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603 MetaWord* allocate(size_t word_size); |
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604 |
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605 // Helper for allocations |
6885 | 606 MetaWord* allocate_work(size_t word_size); |
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607 |
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608 // Returns a block to the per manager freelist |
6885 | 609 void deallocate(MetaWord* p, size_t word_size); |
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610 |
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611 // Based on the allocation size and a minimum chunk size, |
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612 // returned chunk size (for expanding space for chunk allocation). |
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613 size_t calc_chunk_size(size_t allocation_word_size); |
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614 |
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615 // Called when an allocation from the current chunk fails. |
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616 // Gets a new chunk (may require getting a new virtual space), |
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617 // and allocates from that chunk. |
6885 | 618 MetaWord* grow_and_allocate(size_t word_size); |
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619 |
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620 // debugging support. |
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621 |
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622 void dump(outputStream* const out) const; |
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623 void print_on(outputStream* st) const; |
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624 void locked_print_chunks_in_use_on(outputStream* st) const; |
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625 |
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626 void verify(); |
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627 void verify_chunk_size(Metachunk* chunk); |
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628 NOT_PRODUCT(void mangle_freed_chunks();) |
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629 #ifdef ASSERT |
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630 void verify_allocation_total(); |
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631 #endif |
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632 }; |
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633 |
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634 uint const SpaceManager::_small_chunk_limit = 4; |
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635 |
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636 const char* SpaceManager::_expand_lock_name = |
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637 "SpaceManager chunk allocation lock"; |
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638 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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639 Mutex* const SpaceManager::_expand_lock = |
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640 new Mutex(SpaceManager::_expand_lock_rank, |
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641 SpaceManager::_expand_lock_name, |
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642 Mutex::_allow_vm_block_flag); |
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643 |
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644 // BlockFreelist methods |
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645 |
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646 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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647 |
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648 BlockFreelist::~BlockFreelist() { |
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649 if (_dictionary != NULL) { |
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650 if (Verbose && TraceMetadataChunkAllocation) { |
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651 _dictionary->print_free_lists(gclog_or_tty); |
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652 } |
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653 delete _dictionary; |
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654 } |
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655 } |
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656 |
6885 | 657 Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
658 Metablock* block = (Metablock*) p; | |
659 block->set_word_size(word_size); | |
660 block->set_prev(NULL); | |
661 block->set_next(NULL); | |
662 | |
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663 return block; |
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664 } |
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665 |
6885 | 666 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
667 Metablock* free_chunk = initialize_free_chunk(p, word_size); | |
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668 if (dictionary() == NULL) { |
6885 | 669 _dictionary = new BlockTreeDictionary(); |
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670 } |
6885 | 671 dictionary()->return_chunk(free_chunk); |
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672 } |
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673 |
6885 | 674 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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675 if (dictionary() == NULL) { |
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676 return NULL; |
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677 } |
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678 |
6885 | 679 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
680 // Dark matter. Too small for dictionary. | |
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681 return NULL; |
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682 } |
6885 | 683 |
684 Metablock* free_block = | |
685 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::exactly); | |
686 if (free_block == NULL) { | |
687 return NULL; | |
688 } | |
689 | |
690 return (MetaWord*) free_block; | |
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691 } |
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692 |
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693 void BlockFreelist::print_on(outputStream* st) const { |
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694 if (dictionary() == NULL) { |
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695 return; |
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696 } |
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697 dictionary()->print_free_lists(st); |
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698 } |
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699 |
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700 // VirtualSpaceNode methods |
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701 |
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702 VirtualSpaceNode::~VirtualSpaceNode() { |
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703 _rs.release(); |
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704 } |
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705 |
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706 size_t VirtualSpaceNode::used_words_in_vs() const { |
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707 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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708 } |
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709 |
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710 // Space committed in the VirtualSpace |
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711 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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712 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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713 } |
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714 |
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715 |
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716 // Allocates the chunk from the virtual space only. |
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717 // This interface is also used internally for debugging. Not all |
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718 // chunks removed here are necessarily used for allocation. |
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719 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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720 // Bottom of the new chunk |
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721 MetaWord* chunk_limit = top(); |
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722 assert(chunk_limit != NULL, "Not safe to call this method"); |
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723 |
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724 if (!is_available(chunk_word_size)) { |
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725 if (TraceMetadataChunkAllocation) { |
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726 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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727 // Dump some information about the virtual space that is nearly full |
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728 print_on(tty); |
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729 } |
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730 return NULL; |
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731 } |
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732 |
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733 // Take the space (bump top on the current virtual space). |
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734 inc_top(chunk_word_size); |
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735 |
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736 // Point the chunk at the space |
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737 Metachunk* result = Metachunk::initialize(chunk_limit, chunk_word_size); |
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738 return result; |
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739 } |
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740 |
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741 |
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742 // Expand the virtual space (commit more of the reserved space) |
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743 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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744 size_t bytes = words * BytesPerWord; |
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745 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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746 if (TraceMetavirtualspaceAllocation && !result) { |
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747 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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748 "for byte size " SIZE_FORMAT, bytes); |
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749 virtual_space()->print(); |
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750 } |
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751 return result; |
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752 } |
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753 |
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754 // Shrink the virtual space (commit more of the reserved space) |
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755 bool VirtualSpaceNode::shrink_by(size_t words) { |
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756 size_t bytes = words * BytesPerWord; |
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757 virtual_space()->shrink_by(bytes); |
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758 return true; |
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759 } |
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760 |
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761 // Add another chunk to the chunk list. |
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762 |
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763 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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764 assert_lock_strong(SpaceManager::expand_lock()); |
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765 Metachunk* result = NULL; |
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766 |
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767 return take_from_committed(chunk_word_size); |
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768 } |
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769 |
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770 Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
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771 assert_lock_strong(SpaceManager::expand_lock()); |
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772 |
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773 Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
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774 |
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775 if (new_chunk == NULL) { |
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776 // Only a small part of the virtualspace is committed when first |
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777 // allocated so committing more here can be expected. |
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778 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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779 size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
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780 page_size_words); |
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781 expand_by(aligned_expand_vs_by_words, false); |
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782 new_chunk = get_chunk_vs(chunk_word_size); |
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783 } |
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784 return new_chunk; |
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785 } |
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786 |
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787 bool VirtualSpaceNode::initialize() { |
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788 |
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789 if (!_rs.is_reserved()) { |
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790 return false; |
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791 } |
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792 |
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793 // An allocation out of this Virtualspace that is larger |
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794 // than an initial commit size can waste that initial committed |
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795 // space. |
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796 size_t committed_byte_size = 0; |
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797 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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798 if (result) { |
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799 set_top((MetaWord*)virtual_space()->low()); |
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800 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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801 (HeapWord*)(_rs.base() + _rs.size()))); |
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802 |
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803 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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804 err_msg("Reserved start was not set properly " PTR_FORMAT |
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805 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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806 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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807 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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808 " != " SIZE_FORMAT, reserved()->word_size(), |
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809 _rs.size() / BytesPerWord)); |
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810 } |
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811 |
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812 return result; |
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813 } |
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814 |
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815 void VirtualSpaceNode::print_on(outputStream* st) const { |
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816 size_t used = used_words_in_vs(); |
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817 size_t capacity = capacity_words_in_vs(); |
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818 VirtualSpace* vs = virtual_space(); |
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819 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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820 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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821 PTR_FORMAT ", " PTR_FORMAT ")", |
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822 vs, capacity / K, |
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823 capacity == 0 ? 0 : used * 100 / capacity, |
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824 bottom(), top(), end(), |
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825 vs->high_boundary()); |
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826 } |
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827 |
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828 #ifdef ASSERT |
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829 void VirtualSpaceNode::mangle() { |
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830 size_t word_size = capacity_words_in_vs(); |
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831 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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832 } |
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833 #endif // ASSERT |
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834 |
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835 // VirtualSpaceList methods |
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836 // Space allocated from the VirtualSpace |
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837 |
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838 VirtualSpaceList::~VirtualSpaceList() { |
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839 VirtualSpaceListIterator iter(virtual_space_list()); |
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840 while (iter.repeat()) { |
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841 VirtualSpaceNode* vsl = iter.get_next(); |
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842 delete vsl; |
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843 } |
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844 } |
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845 |
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846 size_t VirtualSpaceList::used_words_sum() { |
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847 size_t allocated_by_vs = 0; |
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848 VirtualSpaceListIterator iter(virtual_space_list()); |
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849 while (iter.repeat()) { |
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850 VirtualSpaceNode* vsl = iter.get_next(); |
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851 // Sum used region [bottom, top) in each virtualspace |
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852 allocated_by_vs += vsl->used_words_in_vs(); |
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853 } |
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854 assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
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855 err_msg("Total in free chunks " SIZE_FORMAT |
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856 " greater than total from virtual_spaces " SIZE_FORMAT, |
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857 allocated_by_vs, chunk_manager()->free_chunks_total())); |
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858 size_t used = |
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859 allocated_by_vs - chunk_manager()->free_chunks_total(); |
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860 return used; |
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861 } |
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862 |
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863 // Space available in all MetadataVirtualspaces allocated |
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864 // for metadata. This is the upper limit on the capacity |
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865 // of chunks allocated out of all the MetadataVirtualspaces. |
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866 size_t VirtualSpaceList::capacity_words_sum() { |
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867 size_t capacity = 0; |
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868 VirtualSpaceListIterator iter(virtual_space_list()); |
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869 while (iter.repeat()) { |
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870 VirtualSpaceNode* vsl = iter.get_next(); |
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871 capacity += vsl->capacity_words_in_vs(); |
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872 } |
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873 return capacity; |
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874 } |
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875 |
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876 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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877 _is_class(false), |
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878 _virtual_space_list(NULL), |
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879 _current_virtual_space(NULL), |
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880 _virtual_space_total(0), |
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881 _virtual_space_count(0) { |
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882 MutexLockerEx cl(SpaceManager::expand_lock(), |
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883 Mutex::_no_safepoint_check_flag); |
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884 bool initialization_succeeded = grow_vs(word_size); |
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885 |
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886 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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887 _chunk_manager.free_chunks(SmallIndex)->set_size(SmallChunk); |
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888 _chunk_manager.free_chunks(MediumIndex)->set_size(MediumChunk); |
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889 assert(initialization_succeeded, |
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890 " VirtualSpaceList initialization should not fail"); |
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891 } |
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892 |
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893 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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894 _is_class(true), |
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895 _virtual_space_list(NULL), |
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896 _current_virtual_space(NULL), |
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897 _virtual_space_total(0), |
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898 _virtual_space_count(0) { |
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899 MutexLockerEx cl(SpaceManager::expand_lock(), |
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900 Mutex::_no_safepoint_check_flag); |
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901 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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902 bool succeeded = class_entry->initialize(); |
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903 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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904 _chunk_manager.free_chunks(SmallIndex)->set_size(ClassSmallChunk); |
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905 _chunk_manager.free_chunks(MediumIndex)->set_size(ClassMediumChunk); |
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906 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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907 link_vs(class_entry, rs.size()/BytesPerWord); |
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908 } |
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909 |
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910 // Allocate another meta virtual space and add it to the list. |
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911 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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912 assert_lock_strong(SpaceManager::expand_lock()); |
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913 if (vs_word_size == 0) { |
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914 return false; |
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915 } |
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916 // Reserve the space |
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917 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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918 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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919 |
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920 // Allocate the meta virtual space and initialize it. |
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921 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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922 if (!new_entry->initialize()) { |
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923 delete new_entry; |
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924 return false; |
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925 } else { |
7176
59c790074993
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|
926 // ensure lock-free iteration sees fully initialized node |
59c790074993
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6969
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|
927 OrderAccess::storestore(); |
6725
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928 link_vs(new_entry, vs_word_size); |
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929 return true; |
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|
930 } |
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|
931 } |
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932 |
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933 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
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934 if (virtual_space_list() == NULL) { |
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|
935 set_virtual_space_list(new_entry); |
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936 } else { |
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937 current_virtual_space()->set_next(new_entry); |
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938 } |
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939 set_current_virtual_space(new_entry); |
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940 inc_virtual_space_total(vs_word_size); |
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941 inc_virtual_space_count(); |
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942 #ifdef ASSERT |
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943 new_entry->mangle(); |
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944 #endif |
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945 if (TraceMetavirtualspaceAllocation && Verbose) { |
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946 VirtualSpaceNode* vsl = current_virtual_space(); |
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947 vsl->print_on(tty); |
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948 } |
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949 } |
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950 |
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951 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
7446
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952 size_t grow_chunks_by_words, |
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953 size_t medium_chunk_bunch) { |
6725
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954 |
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955 // Get a chunk from the chunk freelist |
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956 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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|
957 |
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958 // Allocate a chunk out of the current virtual space. |
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959 if (next == NULL) { |
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960 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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|
961 } |
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|
962 |
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963 if (next == NULL) { |
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964 // Not enough room in current virtual space. Try to commit |
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965 // more space. |
7446
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966 size_t expand_vs_by_words = MAX2(medium_chunk_bunch, |
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967 grow_chunks_by_words); |
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968 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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969 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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970 page_size_words); |
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971 bool vs_expanded = |
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972 current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
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973 if (!vs_expanded) { |
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974 // Should the capacity of the metaspaces be expanded for |
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975 // this allocation? If it's the virtual space for classes and is |
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976 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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977 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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978 // Get another virtual space. |
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979 size_t grow_vs_words = |
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980 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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981 if (grow_vs(grow_vs_words)) { |
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982 // Got it. It's on the list now. Get a chunk from it. |
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983 next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
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984 } |
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985 } else { |
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986 // Allocation will fail and induce a GC |
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987 if (TraceMetadataChunkAllocation && Verbose) { |
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988 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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989 " Fail instead of expand the metaspace"); |
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990 } |
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991 } |
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992 } else { |
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993 // The virtual space expanded, get a new chunk |
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994 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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995 assert(next != NULL, "Just expanded, should succeed"); |
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996 } |
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997 } |
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998 |
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999 assert(next == NULL || (next->next() == NULL && next->prev() == NULL), |
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1000 "New chunk is still on some list"); |
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1001 return next; |
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1002 } |
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1003 |
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1004 Metachunk* VirtualSpaceList::get_initialization_chunk(size_t chunk_word_size, |
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1005 size_t chunk_bunch) { |
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1006 // Get a chunk from the chunk freelist |
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1007 Metachunk* new_chunk = get_new_chunk(chunk_word_size, |
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1008 chunk_word_size, |
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1009 chunk_bunch); |
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1010 return new_chunk; |
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1011 } |
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1012 |
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1013 void VirtualSpaceList::print_on(outputStream* st) const { |
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1014 if (TraceMetadataChunkAllocation && Verbose) { |
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1015 VirtualSpaceListIterator iter(virtual_space_list()); |
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1016 while (iter.repeat()) { |
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1017 VirtualSpaceNode* node = iter.get_next(); |
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1018 node->print_on(st); |
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1019 } |
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1020 } |
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1021 } |
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1022 |
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1023 bool VirtualSpaceList::contains(const void *ptr) { |
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1024 VirtualSpaceNode* list = virtual_space_list(); |
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1025 VirtualSpaceListIterator iter(list); |
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1026 while (iter.repeat()) { |
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1027 VirtualSpaceNode* node = iter.get_next(); |
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1028 if (node->reserved()->contains(ptr)) { |
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1029 return true; |
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1030 } |
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1031 } |
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1032 return false; |
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1033 } |
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1034 |
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1035 |
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1036 // MetaspaceGC methods |
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1037 |
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1038 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1039 // Within the VM operation after the GC the attempt to allocate the metadata |
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1040 // should succeed. If the GC did not free enough space for the metaspace |
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1041 // allocation, the HWM is increased so that another virtualspace will be |
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1042 // allocated for the metadata. With perm gen the increase in the perm |
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1043 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1044 // metaspace policy uses those as the small and large steps for the HWM. |
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1045 // |
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1046 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1047 // resize the capacity of the metaspaces. The current implementation |
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1048 // is based on the flags MinMetaspaceFreeRatio and MaxHeapFreeRatio used |
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1049 // to resize the Java heap by some GC's. New flags can be implemented |
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1050 // if really needed. MinHeapFreeRatio is used to calculate how much |
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1051 // free space is desirable in the metaspace capacity to decide how much |
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1052 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
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1053 // free space is desirable in the metaspace capacity before decreasing |
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1054 // the HWM. |
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1055 |
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1056 // Calculate the amount to increase the high water mark (HWM). |
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1057 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1058 // another expansion is not requested too soon. If that is not |
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1059 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1060 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1061 // not enough, expand by the size of the allocation (word_size) plus |
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1062 // some. |
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1063 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1064 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1065 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1066 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1067 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1068 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1069 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1070 if (delta_words > min_delta_words) { |
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1071 // Don't want to hit the high water mark on the next |
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1072 // allocation so make the delta greater than just enough |
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1073 // for this allocation. |
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1074 delta_words = MAX2(delta_words, max_delta_words); |
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1075 if (delta_words > max_delta_words) { |
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1076 // This allocation is large but the next ones are probably not |
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1077 // so increase by the minimum. |
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1078 delta_words = delta_words + min_delta_words; |
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1079 } |
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1080 } |
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1081 return delta_words; |
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1082 } |
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1083 |
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1084 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
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1085 // If the user wants a limit, impose one. |
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1086 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize) && |
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1087 MetaspaceAux::reserved_in_bytes() >= MaxMetaspaceSize) { |
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1088 return false; |
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1089 } |
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1090 |
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1091 // Class virtual space should always be expanded. Call GC for the other |
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1092 // metadata virtual space. |
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1093 if (vsl == Metaspace::class_space_list()) return true; |
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1094 |
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1095 // If this is part of an allocation after a GC, expand |
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1096 // unconditionally. |
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1097 if(MetaspaceGC::expand_after_GC()) { |
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1098 return true; |
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1099 } |
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1100 |
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1101 size_t metaspace_size_words = MetaspaceSize / BytesPerWord; |
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1102 |
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1103 // If the capacity is below the minimum capacity, allow the |
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1104 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1105 // to that minimum capacity so that a GC will not be induced |
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1106 // until that minimum capacity is exceeded. |
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1107 if (vsl->capacity_words_sum() < metaspace_size_words || |
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1108 capacity_until_GC() == 0) { |
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1109 set_capacity_until_GC(metaspace_size_words); |
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1110 return true; |
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1111 } else { |
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1112 if (vsl->capacity_words_sum() < capacity_until_GC()) { |
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1113 return true; |
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1114 } else { |
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1115 if (TraceMetadataChunkAllocation && Verbose) { |
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1116 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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1117 " capacity_until_GC " SIZE_FORMAT |
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1118 " capacity_words_sum " SIZE_FORMAT |
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1119 " used_words_sum " SIZE_FORMAT |
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1120 " free chunks " SIZE_FORMAT |
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1121 " free chunks count %d", |
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1122 word_size, |
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1123 capacity_until_GC(), |
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1124 vsl->capacity_words_sum(), |
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1125 vsl->used_words_sum(), |
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1126 vsl->chunk_manager()->free_chunks_total(), |
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1127 vsl->chunk_manager()->free_chunks_count()); |
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1128 } |
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1129 return false; |
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1130 } |
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1131 } |
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1132 } |
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1133 |
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1134 // Variables are in bytes |
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1135 |
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1136 void MetaspaceGC::compute_new_size() { |
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1137 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1138 uint current_shrink_factor = _shrink_factor; |
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1139 _shrink_factor = 0; |
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1140 |
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1141 VirtualSpaceList *vsl = Metaspace::space_list(); |
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1142 |
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1143 size_t capacity_after_gc = vsl->capacity_bytes_sum(); |
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1144 // Check to see if these two can be calculated without walking the CLDG |
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1145 size_t used_after_gc = vsl->used_bytes_sum(); |
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1146 size_t capacity_until_GC = vsl->capacity_bytes_sum(); |
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1147 size_t free_after_gc = capacity_until_GC - used_after_gc; |
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1148 |
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1149 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1150 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1151 |
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1152 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1153 size_t minimum_desired_capacity = |
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1154 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1155 // Don't shrink less than the initial generation size |
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1156 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1157 MetaspaceSize); |
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1158 |
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1159 if (PrintGCDetails && Verbose) { |
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1160 const double free_percentage = ((double)free_after_gc) / capacity_until_GC; |
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1161 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1162 gclog_or_tty->print_cr(" " |
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1163 " minimum_free_percentage: %6.2f" |
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1164 " maximum_used_percentage: %6.2f", |
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1165 minimum_free_percentage, |
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1166 maximum_used_percentage); |
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1167 double d_free_after_gc = free_after_gc / (double) K; |
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1168 gclog_or_tty->print_cr(" " |
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1169 " free_after_gc : %6.1fK" |
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1170 " used_after_gc : %6.1fK" |
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1171 " capacity_after_gc : %6.1fK" |
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1172 " metaspace HWM : %6.1fK", |
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1173 free_after_gc / (double) K, |
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1174 used_after_gc / (double) K, |
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1175 capacity_after_gc / (double) K, |
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1176 capacity_until_GC / (double) K); |
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1177 gclog_or_tty->print_cr(" " |
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1178 " free_percentage: %6.2f", |
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1179 free_percentage); |
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1180 } |
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1181 |
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1182 |
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1183 if (capacity_until_GC < minimum_desired_capacity) { |
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1184 // If we have less capacity below the metaspace HWM, then |
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1185 // increment the HWM. |
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1186 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1187 // Don't expand unless it's significant |
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1188 if (expand_bytes >= MinMetaspaceExpansion) { |
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1189 size_t expand_words = expand_bytes / BytesPerWord; |
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1190 MetaspaceGC::inc_capacity_until_GC(expand_words); |
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1191 } |
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1192 if (PrintGCDetails && Verbose) { |
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1193 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
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1194 gclog_or_tty->print_cr(" expanding:" |
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1195 " minimum_desired_capacity: %6.1fK" |
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1196 " expand_words: %6.1fK" |
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1197 " MinMetaspaceExpansion: %6.1fK" |
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1198 " new metaspace HWM: %6.1fK", |
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1199 minimum_desired_capacity / (double) K, |
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1200 expand_bytes / (double) K, |
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1201 MinMetaspaceExpansion / (double) K, |
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1202 new_capacity_until_GC / (double) K); |
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1203 } |
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1204 return; |
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1205 } |
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1206 |
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1207 // No expansion, now see if we want to shrink |
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1208 size_t shrink_words = 0; |
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1209 // We would never want to shrink more than this |
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1210 size_t max_shrink_words = capacity_until_GC - minimum_desired_capacity; |
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1211 assert(max_shrink_words >= 0, err_msg("max_shrink_words " SIZE_FORMAT, |
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1212 max_shrink_words)); |
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1213 |
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1214 // Should shrinking be considered? |
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1215 if (MaxMetaspaceFreeRatio < 100) { |
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1216 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1217 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1218 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1219 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1220 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1221 MetaspaceSize); |
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1222 if (PrintGC && Verbose) { |
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1223 gclog_or_tty->print_cr(" " |
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1224 " maximum_free_percentage: %6.2f" |
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1225 " minimum_used_percentage: %6.2f", |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1226 maximum_free_percentage, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1227 minimum_used_percentage); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1228 gclog_or_tty->print_cr(" " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1229 " capacity_until_GC: %6.1fK" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1230 " minimum_desired_capacity: %6.1fK" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1231 " maximum_desired_capacity: %6.1fK", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1232 capacity_until_GC / (double) K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1233 minimum_desired_capacity / (double) K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1234 maximum_desired_capacity / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1235 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1236 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1237 assert(minimum_desired_capacity <= maximum_desired_capacity, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1238 "sanity check"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1239 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1240 if (capacity_until_GC > maximum_desired_capacity) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1241 // Capacity too large, compute shrinking size |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1242 shrink_words = capacity_until_GC - maximum_desired_capacity; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1243 // We don't want shrink all the way back to initSize if people call |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1244 // System.gc(), because some programs do that between "phases" and then |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1245 // we'd just have to grow the heap up again for the next phase. So we |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1246 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1247 // on the third call, and 100% by the fourth call. But if we recompute |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1248 // size without shrinking, it goes back to 0%. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1249 shrink_words = shrink_words / 100 * current_shrink_factor; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1250 assert(shrink_words <= max_shrink_words, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1251 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1252 shrink_words, max_shrink_words)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1253 if (current_shrink_factor == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1254 _shrink_factor = 10; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1255 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1256 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1257 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1258 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1259 gclog_or_tty->print_cr(" " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1260 " shrinking:" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1261 " initSize: %.1fK" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1262 " maximum_desired_capacity: %.1fK", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1263 MetaspaceSize / (double) K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1264 maximum_desired_capacity / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1265 gclog_or_tty->print_cr(" " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1266 " shrink_words: %.1fK" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1267 " current_shrink_factor: %d" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1268 " new shrink factor: %d" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1269 " MinMetaspaceExpansion: %.1fK", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1270 shrink_words / (double) K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1271 current_shrink_factor, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1272 _shrink_factor, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1273 MinMetaspaceExpansion / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1274 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1275 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1276 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1277 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1278 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1279 // Don't shrink unless it's significant |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1280 if (shrink_words >= MinMetaspaceExpansion) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1281 VirtualSpaceNode* csp = vsl->current_virtual_space(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1282 size_t available_to_shrink = csp->capacity_words_in_vs() - |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1283 csp->used_words_in_vs(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1284 shrink_words = MIN2(shrink_words, available_to_shrink); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1285 csp->shrink_by(shrink_words); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1286 MetaspaceGC::dec_capacity_until_GC(shrink_words); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1287 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1288 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1289 gclog_or_tty->print_cr(" metaspace HWM: %.1fK", new_capacity_until_GC / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1290 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1291 } |
8784
79af1312fc2c
8005602: NPG: classunloading does not happen while CMS GC with -XX:+CMSClassUnloadingEnabled is used
mgerdin
parents:
8738
diff
changeset
|
1292 assert(used_after_gc <= vsl->capacity_bytes_sum(), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1293 "sanity check"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1294 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1295 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1296 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1297 // Metadebug methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1298 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1299 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1300 size_t chunk_word_size){ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1301 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1302 VirtualSpaceList* vsl = sm->vs_list(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1303 if (MetaDataDeallocateALot && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1304 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1305 Metadebug::reset_deallocate_chunk_a_lot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1306 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1307 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1308 if (dummy_chunk == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1309 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1310 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1311 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1312 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1313 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1314 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1315 sm->sum_count_in_chunks_in_use()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1316 dummy_chunk->print_on(gclog_or_tty); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1317 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1318 vsl->chunk_manager()->free_chunks_total(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1319 vsl->chunk_manager()->free_chunks_count()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1320 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1321 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1322 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1323 Metadebug::inc_deallocate_chunk_a_lot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1324 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1325 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1326 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1327 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
1328 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1329 size_t raw_word_size){ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1330 #ifdef ASSERT |
da91efe96a93
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coleenp
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diff
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|
1331 if (MetaDataDeallocateALot && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1332 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1333 Metadebug::set_deallocate_block_a_lot_count(0); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1334 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1335 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1336 if (dummy_block == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1337 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1338 } |
6885 | 1339 sm->deallocate(dummy_block, raw_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1340 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1341 } else { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1342 Metadebug::inc_deallocate_block_a_lot_count(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1343 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1344 #endif |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1345 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1346 |
da91efe96a93
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parents:
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changeset
|
1347 void Metadebug::init_allocation_fail_alot_count() { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1348 if (MetadataAllocationFailALot) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1349 _allocation_fail_alot_count = |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1350 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1351 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1352 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1353 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1354 #ifdef ASSERT |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1355 bool Metadebug::test_metadata_failure() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1356 if (MetadataAllocationFailALot && |
da91efe96a93
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coleenp
parents:
diff
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|
1357 Threads::is_vm_complete()) { |
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1358 if (_allocation_fail_alot_count > 0) { |
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1359 _allocation_fail_alot_count--; |
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1360 } else { |
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1361 if (TraceMetadataChunkAllocation && Verbose) { |
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1362 gclog_or_tty->print_cr("Metadata allocation failing for " |
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1363 "MetadataAllocationFailALot"); |
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1364 } |
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1365 init_allocation_fail_alot_count(); |
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1366 return true; |
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1367 } |
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1368 } |
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1369 return false; |
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1370 } |
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1371 #endif |
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1372 |
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1373 // ChunkManager methods |
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1374 |
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1375 // Verification of _free_chunks_total and _free_chunks_count does not |
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1376 // work with the CMS collector because its use of additional locks |
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1377 // complicate the mutex deadlock detection but it can still be useful |
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1378 // for detecting errors in the chunk accounting with other collectors. |
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1379 |
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1380 size_t ChunkManager::free_chunks_total() { |
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1381 #ifdef ASSERT |
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1382 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1383 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1384 Mutex::_no_safepoint_check_flag); |
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1385 slow_locked_verify_free_chunks_total(); |
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1386 } |
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1387 #endif |
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1388 return _free_chunks_total; |
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1389 } |
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1390 |
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1391 size_t ChunkManager::free_chunks_total_in_bytes() { |
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1392 return free_chunks_total() * BytesPerWord; |
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1393 } |
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1394 |
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1395 size_t ChunkManager::free_chunks_count() { |
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1396 #ifdef ASSERT |
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1397 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1398 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1399 Mutex::_no_safepoint_check_flag); |
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1400 // This lock is only needed in debug because the verification |
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1401 // of the _free_chunks_totals walks the list of free chunks |
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1402 slow_locked_verify_free_chunks_count(); |
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1403 } |
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1404 #endif |
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1405 return _free_chunks_count; |
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1406 } |
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1407 |
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1408 void ChunkManager::locked_verify_free_chunks_total() { |
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1409 assert_lock_strong(SpaceManager::expand_lock()); |
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1410 assert(sum_free_chunks() == _free_chunks_total, |
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1411 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
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1412 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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1413 sum_free_chunks())); |
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1414 } |
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1415 |
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1416 void ChunkManager::verify_free_chunks_total() { |
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1417 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1418 Mutex::_no_safepoint_check_flag); |
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1419 locked_verify_free_chunks_total(); |
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1420 } |
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1421 |
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1422 void ChunkManager::locked_verify_free_chunks_count() { |
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1423 assert_lock_strong(SpaceManager::expand_lock()); |
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1424 assert(sum_free_chunks_count() == _free_chunks_count, |
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1425 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1426 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1427 sum_free_chunks_count())); |
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1428 } |
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1429 |
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1430 void ChunkManager::verify_free_chunks_count() { |
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1431 #ifdef ASSERT |
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1432 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1433 Mutex::_no_safepoint_check_flag); |
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1434 locked_verify_free_chunks_count(); |
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1435 #endif |
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1436 } |
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1437 |
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1438 void ChunkManager::verify() { |
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1439 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1440 Mutex::_no_safepoint_check_flag); |
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1441 locked_verify(); |
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1442 } |
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1443 |
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1444 void ChunkManager::locked_verify() { |
6885 | 1445 locked_verify_free_chunks_count(); |
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1446 locked_verify_free_chunks_total(); |
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|
1447 } |
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1448 |
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1449 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1450 assert_lock_strong(SpaceManager::expand_lock()); |
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1451 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1452 _free_chunks_total, _free_chunks_count); |
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1453 } |
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1454 |
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1455 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1456 assert_lock_strong(SpaceManager::expand_lock()); |
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1457 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1458 sum_free_chunks(), sum_free_chunks_count()); |
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|
1459 } |
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1460 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1461 return &_free_chunks[index]; |
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|
1462 } |
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|
1463 |
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1464 // These methods that sum the free chunk lists are used in printing |
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1465 // methods that are used in product builds. |
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1466 size_t ChunkManager::sum_free_chunks() { |
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1467 assert_lock_strong(SpaceManager::expand_lock()); |
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1468 size_t result = 0; |
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1469 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
6725
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1470 ChunkList* list = free_chunks(i); |
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|
1471 |
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1472 if (list == NULL) { |
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1473 continue; |
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|
1474 } |
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|
1475 |
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|
1476 result = result + list->count() * list->size(); |
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1477 } |
6885 | 1478 result = result + humongous_dictionary()->total_size(); |
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1479 return result; |
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1480 } |
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1481 |
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1482 size_t ChunkManager::sum_free_chunks_count() { |
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1483 assert_lock_strong(SpaceManager::expand_lock()); |
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1484 size_t count = 0; |
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1485 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
6725
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1486 ChunkList* list = free_chunks(i); |
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1487 if (list == NULL) { |
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1488 continue; |
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1489 } |
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1490 count = count + list->count(); |
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1491 } |
6885 | 1492 count = count + humongous_dictionary()->total_free_blocks(); |
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1493 return count; |
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1494 } |
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1495 |
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1496 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1497 ChunkIndex index = list_index(word_size); |
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1498 assert(index < HumongousIndex, "No humongous list"); |
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1499 return free_chunks(index); |
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1500 } |
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1501 |
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1502 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1503 assert_lock_strong(SpaceManager::expand_lock()); |
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1504 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1505 chunk->set_next(free_list->head()); |
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1506 free_list->set_head(chunk); |
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1507 // chunk is being returned to the chunk free list |
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1508 inc_free_chunks_total(chunk->capacity_word_size()); |
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1509 slow_locked_verify(); |
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1510 } |
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1511 |
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1512 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1513 // The deallocation of a chunk originates in the freelist |
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1514 // manangement code for a Metaspace and does not hold the |
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1515 // lock. |
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1516 assert(chunk != NULL, "Deallocating NULL"); |
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1517 assert_lock_strong(SpaceManager::expand_lock()); |
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1518 slow_locked_verify(); |
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1519 if (TraceMetadataChunkAllocation) { |
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1520 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1521 PTR_FORMAT " size " SIZE_FORMAT, |
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1522 chunk, chunk->word_size()); |
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1523 } |
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1524 free_chunks_put(chunk); |
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1525 } |
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1526 |
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1527 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1528 assert_lock_strong(SpaceManager::expand_lock()); |
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1529 |
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1530 slow_locked_verify(); |
6885 | 1531 |
1532 Metachunk* chunk = NULL; | |
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1533 if (list_index(word_size) != HumongousIndex) { |
6885 | 1534 ChunkList* free_list = find_free_chunks_list(word_size); |
1535 assert(free_list != NULL, "Sanity check"); | |
1536 | |
1537 chunk = free_list->head(); | |
1538 debug_only(Metachunk* debug_head = chunk;) | |
1539 | |
1540 if (chunk == NULL) { | |
1541 return NULL; | |
1542 } | |
1543 | |
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1544 // Remove the chunk as the head of the list. |
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1545 free_list->remove_chunk(chunk); |
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1546 |
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1547 // Chunk is being removed from the chunks free list. |
6885 | 1548 dec_free_chunks_total(chunk->capacity_word_size()); |
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1549 |
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1550 if (TraceMetadataChunkAllocation && Verbose) { |
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1551 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1552 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1553 free_list, chunk, chunk->word_size()); |
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1554 } |
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1555 } else { |
6885 | 1556 chunk = humongous_dictionary()->get_chunk( |
1557 word_size, | |
1558 FreeBlockDictionary<Metachunk>::atLeast); | |
1559 | |
1560 if (chunk != NULL) { | |
1561 if (TraceMetadataHumongousAllocation) { | |
1562 size_t waste = chunk->word_size() - word_size; | |
1563 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT | |
1564 " for requested size " SIZE_FORMAT | |
1565 " waste " SIZE_FORMAT, | |
1566 chunk->word_size(), word_size, waste); | |
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1567 } |
6885 | 1568 // Chunk is being removed from the chunks free list. |
1569 dec_free_chunks_total(chunk->capacity_word_size()); | |
1570 #ifdef ASSERT | |
1571 chunk->set_is_free(false); | |
1572 #endif | |
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1573 } else { |
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1574 return NULL; |
6885 | 1575 } |
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1576 } |
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1577 |
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1578 // Remove it from the links to this freelist |
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1579 chunk->set_next(NULL); |
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1580 chunk->set_prev(NULL); |
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1581 slow_locked_verify(); |
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1582 return chunk; |
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1583 } |
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1584 |
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1585 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1586 assert_lock_strong(SpaceManager::expand_lock()); |
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1587 slow_locked_verify(); |
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1588 |
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1589 // Take from the beginning of the list |
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1590 Metachunk* chunk = free_chunks_get(word_size); |
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1591 if (chunk == NULL) { |
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1592 return NULL; |
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1593 } |
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1594 |
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1595 assert((word_size <= chunk->word_size()) || |
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1596 list_index(chunk->word_size() == HumongousIndex), |
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1597 "Non-humongous variable sized chunk"); |
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1598 if (TraceMetadataChunkAllocation) { |
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1599 size_t list_count; |
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1600 if (list_index(word_size) < HumongousIndex) { |
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1601 ChunkList* list = find_free_chunks_list(word_size); |
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1602 list_count = list->count(); |
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1603 } else { |
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1604 list_count = humongous_dictionary()->total_count(); |
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1605 } |
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1606 tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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1607 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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1608 this, chunk, chunk->word_size(), list_count); |
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1609 locked_print_free_chunks(tty); |
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1610 } |
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1611 |
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1612 return chunk; |
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1613 } |
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1614 |
6885 | 1615 void ChunkManager::print_on(outputStream* out) { |
1616 if (PrintFLSStatistics != 0) { | |
1617 humongous_dictionary()->report_statistics(); | |
1618 } | |
1619 } | |
1620 | |
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1621 // SpaceManager methods |
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1622 |
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1623 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1624 size_t* chunk_word_size, |
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1625 size_t* class_chunk_word_size) { |
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1626 switch (type) { |
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1627 case Metaspace::BootMetaspaceType: |
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1628 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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1629 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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1630 break; |
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1631 case Metaspace::ROMetaspaceType: |
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1632 *chunk_word_size = SharedReadOnlySize / wordSize; |
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1633 *class_chunk_word_size = ClassSpecializedChunk; |
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1634 break; |
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1635 case Metaspace::ReadWriteMetaspaceType: |
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1636 *chunk_word_size = SharedReadWriteSize / wordSize; |
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1637 *class_chunk_word_size = ClassSpecializedChunk; |
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1638 break; |
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1639 case Metaspace::AnonymousMetaspaceType: |
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1640 case Metaspace::ReflectionMetaspaceType: |
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1641 *chunk_word_size = SpecializedChunk; |
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1642 *class_chunk_word_size = ClassSpecializedChunk; |
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7435
diff
changeset
|
1643 break; |
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
1644 default: |
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parents:
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diff
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|
1645 *chunk_word_size = SmallChunk; |
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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parents:
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diff
changeset
|
1646 *class_chunk_word_size = ClassSmallChunk; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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parents:
7435
diff
changeset
|
1647 break; |
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jmasa
parents:
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diff
changeset
|
1648 } |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
changeset
|
1649 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
7446
e51c9860cf66
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parents:
7435
diff
changeset
|
1650 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
e51c9860cf66
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diff
changeset
|
1651 " class " SIZE_FORMAT, |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
changeset
|
1652 *chunk_word_size, *class_chunk_word_size)); |
7446
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parents:
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diff
changeset
|
1653 } |
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|
1654 |
6725
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parents:
diff
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|
1655 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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parents:
diff
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|
1656 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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coleenp
parents:
diff
changeset
|
1657 size_t free = 0; |
7446
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diff
changeset
|
1658 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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parents:
diff
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|
1659 Metachunk* chunk = chunks_in_use(i); |
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coleenp
parents:
diff
changeset
|
1660 while (chunk != NULL) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1661 free += chunk->free_word_size(); |
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coleenp
parents:
diff
changeset
|
1662 chunk = chunk->next(); |
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coleenp
parents:
diff
changeset
|
1663 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1664 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1665 return free; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1666 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1667 |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1668 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1669 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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coleenp
parents:
diff
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|
1670 size_t result = 0; |
7446
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|
1671 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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diff
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|
1672 result += sum_waste_in_chunks_in_use(i); |
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diff
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|
1673 } |
6885 | 1674 |
6725
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coleenp
parents:
diff
changeset
|
1675 return result; |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1676 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1677 |
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diff
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|
1678 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1679 size_t result = 0; |
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coleenp
parents:
diff
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|
1680 Metachunk* chunk = chunks_in_use(index); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1681 // Count the free space in all the chunk but not the |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1682 // current chunk from which allocations are still being done. |
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coleenp
parents:
diff
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|
1683 if (chunk != NULL) { |
6885 | 1684 Metachunk* prev = chunk; |
1685 while (chunk != NULL && chunk != current_chunk()) { | |
1686 result += chunk->free_word_size(); | |
1687 prev = chunk; | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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|
1688 chunk = chunk->next(); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1689 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1690 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1691 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1692 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1693 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1694 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1695 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
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coleenp
parents:
diff
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|
1696 size_t sum = 0; |
7446
e51c9860cf66
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parents:
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|
1697 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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coleenp
parents:
diff
changeset
|
1698 Metachunk* chunk = chunks_in_use(i); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1699 while (chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1700 // Just changed this sum += chunk->capacity_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1701 // sum += chunk->word_size() - Metachunk::overhead(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1702 sum += chunk->capacity_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1703 chunk = chunk->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1704 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1705 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1706 return sum; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1707 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1708 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1709 size_t SpaceManager::sum_count_in_chunks_in_use() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1710 size_t count = 0; |
7446
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
1711 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1712 count = count + sum_count_in_chunks_in_use(i); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1713 } |
6885 | 1714 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1715 return count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1716 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1717 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1718 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1719 size_t count = 0; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1720 Metachunk* chunk = chunks_in_use(i); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1721 while (chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1722 count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1723 chunk = chunk->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1724 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1725 return count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1726 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1727 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1728 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1729 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1730 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1731 size_t used = 0; |
7446
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jmasa
parents:
7435
diff
changeset
|
1732 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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coleenp
parents:
diff
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|
1733 Metachunk* chunk = chunks_in_use(i); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1734 while (chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1735 used += chunk->used_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1736 chunk = chunk->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1737 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1738 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1739 return used; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1740 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1741 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1742 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1743 |
7446
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jmasa
parents:
7435
diff
changeset
|
1744 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
1745 Metachunk* chunk = chunks_in_use(i); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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diff
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|
1746 st->print("SpaceManager: %s " PTR_FORMAT, |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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diff
changeset
|
1747 chunk_size_name(i), chunk); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
1748 if (chunk != NULL) { |
e51c9860cf66
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jmasa
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diff
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|
1749 st->print_cr(" free " SIZE_FORMAT, |
e51c9860cf66
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diff
changeset
|
1750 chunk->free_word_size()); |
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
1751 } else { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
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diff
changeset
|
1752 st->print_cr(""); |
e51c9860cf66
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jmasa
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|
1753 } |
e51c9860cf66
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|
1754 } |
6725
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|
1755 |
da91efe96a93
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coleenp
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diff
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|
1756 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1757 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1758 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
1759 |
da91efe96a93
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|
1760 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1761 |
da91efe96a93
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diff
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|
1762 // Decide between a small chunk and a medium chunk. Up to |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1763 // _small_chunk_limit small chunks can be allocated but |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1764 // once a medium chunk has been allocated, no more small |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1765 // chunks will be allocated. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1766 size_t chunk_word_size; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1767 if (chunks_in_use(MediumIndex) == NULL && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1768 (!has_small_chunk_limit() || |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1769 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit)) { |
7446
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7435
diff
changeset
|
1770 chunk_word_size = (size_t) small_chunk_size(); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
1771 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
e51c9860cf66
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diff
changeset
|
1772 chunk_word_size = medium_chunk_size(); |
6725
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diff
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|
1773 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1774 } else { |
7446
e51c9860cf66
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parents:
7435
diff
changeset
|
1775 chunk_word_size = medium_chunk_size(); |
6725
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1776 } |
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1777 |
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1778 // Might still need a humongous chunk. Enforce an |
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1779 // eight word granularity to facilitate reuse (some |
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1780 // wastage but better chance of reuse). |
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1781 size_t if_humongous_sized_chunk = |
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1782 align_size_up(word_size + Metachunk::overhead(), |
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1783 HumongousChunkGranularity); |
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1784 chunk_word_size = |
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1785 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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1786 |
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1787 assert(!SpaceManager::is_humongous(word_size) || |
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1788 chunk_word_size == if_humongous_sized_chunk, |
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1789 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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1790 " chunk_word_size " SIZE_FORMAT, |
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1791 word_size, chunk_word_size)); |
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1792 if (TraceMetadataHumongousAllocation && |
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1793 SpaceManager::is_humongous(word_size)) { |
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1794 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1795 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1796 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1797 chunk_word_size); |
6885 | 1798 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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1799 Metachunk::overhead()); |
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1800 } |
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1801 return chunk_word_size; |
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1802 } |
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1803 |
6885 | 1804 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1805 assert(vs_list()->current_virtual_space() != NULL, |
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1806 "Should have been set"); |
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1807 assert(current_chunk() == NULL || |
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1808 current_chunk()->allocate(word_size) == NULL, |
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1809 "Don't need to expand"); |
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1810 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1811 |
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1812 if (TraceMetadataChunkAllocation && Verbose) { |
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1813 size_t words_left = 0; |
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1814 size_t words_used = 0; |
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1815 if (current_chunk() != NULL) { |
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1816 words_left = current_chunk()->free_word_size(); |
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1817 words_used = current_chunk()->used_word_size(); |
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1818 } |
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1819 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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1820 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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1821 " words left", |
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1822 word_size, words_used, words_left); |
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1823 } |
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1824 |
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1825 // Get another chunk out of the virtual space |
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1826 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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1827 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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1828 |
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1829 // If a chunk was available, add it to the in-use chunk list |
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1830 // and do an allocation from it. |
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1831 if (next != NULL) { |
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1832 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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1833 // Add to this manager's list of chunks in use. |
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1834 add_chunk(next, false); |
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1835 return next->allocate(word_size); |
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1836 } |
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1837 return NULL; |
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1838 } |
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1839 |
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1840 void SpaceManager::print_on(outputStream* st) const { |
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1841 |
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1842 for (ChunkIndex i = ZeroIndex; |
6885 | 1843 i < NumberOfInUseLists ; |
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1844 i = next_chunk_index(i) ) { |
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1845 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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1846 chunks_in_use(i), |
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1847 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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1848 } |
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1849 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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1850 " Humongous " SIZE_FORMAT, |
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1851 sum_waste_in_chunks_in_use(SmallIndex), |
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1852 sum_waste_in_chunks_in_use(MediumIndex), |
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1853 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 1854 // block free lists |
1855 if (block_freelists() != NULL) { | |
1856 st->print_cr("total in block free lists " SIZE_FORMAT, | |
1857 block_freelists()->total_size()); | |
1858 } | |
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1859 } |
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1860 |
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1861 SpaceManager::SpaceManager(Mutex* lock, |
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1862 VirtualSpaceList* vs_list) : |
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1863 _vs_list(vs_list), |
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1864 _allocation_total(0), |
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1865 _lock(lock) |
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1866 { |
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1867 initialize(); |
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1868 } |
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1869 |
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1870 void SpaceManager::initialize() { |
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1871 Metadebug::init_allocation_fail_alot_count(); |
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1872 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1873 _chunks_in_use[i] = NULL; |
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1874 } |
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1875 _current_chunk = NULL; |
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1876 if (TraceMetadataChunkAllocation && Verbose) { |
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1877 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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1878 } |
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1879 } |
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1880 |
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1881 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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1882 if (chunks == NULL) { |
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1883 return; |
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1884 } |
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1885 ChunkList* list = free_chunks(index); |
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1886 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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1887 assert_lock_strong(SpaceManager::expand_lock()); |
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1888 Metachunk* cur = chunks; |
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1889 |
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1890 // This return chunks one at a time. If a new |
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1891 // class List can be created that is a base class |
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1892 // of FreeList then something like FreeList::prepend() |
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1893 // can be used in place of this loop |
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1894 while (cur != NULL) { |
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1895 // Capture the next link before it is changed |
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1896 // by the call to return_chunk_at_head(); |
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1897 Metachunk* next = cur->next(); |
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1898 cur->set_is_free(true); |
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1899 list->return_chunk_at_head(cur); |
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1900 cur = next; |
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1901 } |
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1902 } |
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1903 |
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1904 SpaceManager::~SpaceManager() { |
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1905 // This call this->_lock which can't be done while holding expand_lock() |
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1906 const size_t in_use_before = sum_capacity_in_chunks_in_use(); |
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1907 |
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1908 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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1909 Mutex::_no_safepoint_check_flag); |
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1910 |
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1911 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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1912 |
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1913 chunk_manager->slow_locked_verify(); |
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1914 |
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1915 if (TraceMetadataChunkAllocation && Verbose) { |
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1916 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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1917 locked_print_chunks_in_use_on(gclog_or_tty); |
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1918 } |
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1919 |
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1920 // Mangle freed memory. |
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1921 NOT_PRODUCT(mangle_freed_chunks();) |
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1922 |
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1923 // Have to update before the chunks_in_use lists are emptied |
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1924 // below. |
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1925 chunk_manager->inc_free_chunks_total(in_use_before, |
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1926 sum_count_in_chunks_in_use()); |
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1927 |
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1928 // Add all the chunks in use by this space manager |
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1929 // to the global list of free chunks. |
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1930 |
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1931 // Follow each list of chunks-in-use and add them to the |
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1932 // free lists. Each list is NULL terminated. |
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1933 |
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1934 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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1935 if (TraceMetadataChunkAllocation && Verbose) { |
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1936 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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1937 sum_count_in_chunks_in_use(i), |
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1938 chunk_size_name(i)); |
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1939 } |
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1940 Metachunk* chunks = chunks_in_use(i); |
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1941 chunk_manager->return_chunks(i, chunks); |
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1942 set_chunks_in_use(i, NULL); |
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1943 if (TraceMetadataChunkAllocation && Verbose) { |
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1944 gclog_or_tty->print_cr("updated freelist count %d %s", |
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1945 chunk_manager->free_chunks(i)->count(), |
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1946 chunk_size_name(i)); |
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1947 } |
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1948 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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1949 } |
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1950 |
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1951 // The medium chunk case may be optimized by passing the head and |
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1952 // tail of the medium chunk list to add_at_head(). The tail is often |
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1953 // the current chunk but there are probably exceptions. |
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1954 |
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1955 // Humongous chunks |
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1956 if (TraceMetadataChunkAllocation && Verbose) { |
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1957 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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1958 sum_count_in_chunks_in_use(HumongousIndex), |
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1959 chunk_size_name(HumongousIndex)); |
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1960 gclog_or_tty->print("Humongous chunk dictionary: "); |
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1961 } |
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1962 // Humongous chunks are never the current chunk. |
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1963 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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1964 |
6885 | 1965 while (humongous_chunks != NULL) { |
1966 #ifdef ASSERT | |
1967 humongous_chunks->set_is_free(true); | |
1968 #endif | |
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1969 if (TraceMetadataChunkAllocation && Verbose) { |
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1970 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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1971 humongous_chunks, |
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1972 humongous_chunks->word_size()); |
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1973 } |
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1974 assert(humongous_chunks->word_size() == (size_t) |
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1975 align_size_up(humongous_chunks->word_size(), |
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1976 HumongousChunkGranularity), |
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1977 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
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1978 " granularity %d", |
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1979 humongous_chunks->word_size(), HumongousChunkGranularity)); |
6885 | 1980 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
1981 chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); | |
1982 humongous_chunks = next_humongous_chunks; | |
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1983 } |
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1984 if (TraceMetadataChunkAllocation && Verbose) { |
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1985 gclog_or_tty->print_cr(""); |
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1986 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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1987 chunk_manager->humongous_dictionary()->total_count(), |
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1988 chunk_size_name(HumongousIndex)); |
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1989 } |
6885 | 1990 set_chunks_in_use(HumongousIndex, NULL); |
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1991 chunk_manager->slow_locked_verify(); |
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1992 } |
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1993 |
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1994 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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1995 switch (index) { |
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1996 case SpecializedIndex: |
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1997 return "Specialized"; |
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1998 case SmallIndex: |
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1999 return "Small"; |
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2000 case MediumIndex: |
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2001 return "Medium"; |
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2002 case HumongousIndex: |
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2003 return "Humongous"; |
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2004 default: |
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2005 return NULL; |
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2006 } |
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2007 } |
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2008 |
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2009 ChunkIndex ChunkManager::list_index(size_t size) { |
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2010 switch (size) { |
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2011 case SpecializedChunk: |
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2012 assert(SpecializedChunk == ClassSpecializedChunk, |
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2013 "Need branch for ClassSpecializedChunk"); |
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2014 return SpecializedIndex; |
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2015 case SmallChunk: |
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2016 case ClassSmallChunk: |
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2017 return SmallIndex; |
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2018 case MediumChunk: |
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2019 case ClassMediumChunk: |
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2020 return MediumIndex; |
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2021 default: |
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2022 assert(size > MediumChunk || size > ClassMediumChunk, |
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2023 "Not a humongous chunk"); |
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2024 return HumongousIndex; |
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2025 } |
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2026 } |
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2027 |
6885 | 2028 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2029 assert_lock_strong(_lock); |
6885 | 2030 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
2031 assert(word_size >= min_size, | |
2032 err_msg("Should not deallocate dark matter " SIZE_FORMAT, word_size)); | |
2033 block_freelists()->return_block(p, word_size); | |
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2034 } |
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2035 |
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2036 // Adds a chunk to the list of chunks in use. |
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2037 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2038 |
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2039 assert(new_chunk != NULL, "Should not be NULL"); |
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2040 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2041 |
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2042 new_chunk->reset_empty(); |
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2043 |
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2044 // Find the correct list and and set the current |
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2045 // chunk for that list. |
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2046 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2047 |
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2048 if (index != HumongousIndex) { |
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2049 set_current_chunk(new_chunk); |
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2050 new_chunk->set_next(chunks_in_use(index)); |
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2051 set_chunks_in_use(index, new_chunk); |
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2052 } else { |
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2053 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2054 // small, so small will be null. Link this first chunk as the current |
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2055 // chunk. |
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2056 if (make_current) { |
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2057 // Set as the current chunk but otherwise treat as a humongous chunk. |
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2058 set_current_chunk(new_chunk); |
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2059 } |
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2060 // Link at head. The _current_chunk only points to a humongous chunk for |
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2061 // the null class loader metaspace (class and data virtual space managers) |
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2062 // any humongous chunks so will not point to the tail |
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2063 // of the humongous chunks list. |
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2064 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2065 set_chunks_in_use(HumongousIndex, new_chunk); |
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2066 |
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2067 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
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2068 } |
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2069 |
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2070 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2071 if (TraceMetadataChunkAllocation && Verbose) { |
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2072 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2073 sum_count_in_chunks_in_use()); |
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2074 new_chunk->print_on(gclog_or_tty); |
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2075 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
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2076 } |
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2077 } |
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2078 |
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2079 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
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2080 size_t grow_chunks_by_words) { |
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2081 |
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2082 Metachunk* next = vs_list()->get_new_chunk(word_size, |
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2083 grow_chunks_by_words, |
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2084 medium_chunk_bunch()); |
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2085 |
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2086 if (TraceMetadataHumongousAllocation && |
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2087 SpaceManager::is_humongous(next->word_size())) { |
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2088 gclog_or_tty->print_cr(" new humongous chunk word size " PTR_FORMAT, |
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2089 next->word_size()); |
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2090 } |
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2091 |
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2092 return next; |
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2093 } |
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2094 |
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2095 MetaWord* SpaceManager::allocate(size_t word_size) { |
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2096 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2097 |
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2098 // If only the dictionary is going to be used (i.e., no |
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2099 // indexed free list), then there is a minimum size requirement. |
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2100 // MinChunkSize is a placeholder for the real minimum size JJJ |
6885 | 2101 size_t byte_size = word_size * BytesPerWord; |
2102 | |
2103 size_t byte_size_with_overhead = byte_size + Metablock::overhead(); | |
2104 | |
2105 size_t raw_bytes_size = MAX2(byte_size_with_overhead, | |
2106 Metablock::min_block_byte_size()); | |
2107 raw_bytes_size = ARENA_ALIGN(raw_bytes_size); | |
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2108 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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2109 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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2110 |
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2111 BlockFreelist* fl = block_freelists(); |
6885 | 2112 MetaWord* p = NULL; |
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2113 // Allocation from the dictionary is expensive in the sense that |
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2114 // the dictionary has to be searched for a size. Don't allocate |
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2115 // from the dictionary until it starts to get fat. Is this |
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2116 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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2117 // for allocations. Do some profiling. JJJ |
6885 | 2118 if (fl->total_size() > allocation_from_dictionary_limit) { |
2119 p = fl->get_block(raw_word_size); | |
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2120 } |
6885 | 2121 if (p == NULL) { |
2122 p = allocate_work(raw_word_size); | |
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2123 } |
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2124 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
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2125 |
6885 | 2126 return p; |
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2127 } |
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2128 |
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2129 // Returns the address of spaced allocated for "word_size". |
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2130 // This methods does not know about blocks (Metablocks) |
6885 | 2131 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
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2132 assert_lock_strong(_lock); |
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2133 #ifdef ASSERT |
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2134 if (Metadebug::test_metadata_failure()) { |
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2135 return NULL; |
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2136 } |
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2137 #endif |
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2138 // Is there space in the current chunk? |
6885 | 2139 MetaWord* result = NULL; |
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2140 |
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2141 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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2142 // never null because we gave it the size we wanted. Caller reports out |
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2143 // of memory if this returns null. |
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2144 if (DumpSharedSpaces) { |
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2145 assert(current_chunk() != NULL, "should never happen"); |
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2146 inc_allocation_total(word_size); |
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2147 return current_chunk()->allocate(word_size); // caller handles null result |
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2148 } |
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2149 if (current_chunk() != NULL) { |
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2150 result = current_chunk()->allocate(word_size); |
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2151 } |
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2152 |
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2153 if (result == NULL) { |
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2154 result = grow_and_allocate(word_size); |
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2155 } |
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2156 if (result > 0) { |
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2157 inc_allocation_total(word_size); |
6885 | 2158 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2159 "Head of the list is being allocated"); | |
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2160 } |
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2161 |
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2162 return result; |
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2163 } |
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2164 |
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2165 void SpaceManager::verify() { |
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2166 // If there are blocks in the dictionary, then |
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2167 // verfication of chunks does not work since |
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2168 // being in the dictionary alters a chunk. |
6885 | 2169 if (block_freelists()->total_size() == 0) { |
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2170 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2171 Metachunk* curr = chunks_in_use(i); |
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2172 while (curr != NULL) { |
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2173 curr->verify(); |
7208
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2174 verify_chunk_size(curr); |
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2175 curr = curr->next(); |
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2176 } |
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2177 } |
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2178 } |
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2179 } |
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2180 |
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2181 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
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2182 assert(is_humongous(chunk->word_size()) || |
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2183 chunk->word_size() == medium_chunk_size() || |
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2184 chunk->word_size() == small_chunk_size() || |
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2185 chunk->word_size() == specialized_chunk_size(), |
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2186 "Chunk size is wrong"); |
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2187 return; |
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2188 } |
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2189 |
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2190 #ifdef ASSERT |
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2191 void SpaceManager::verify_allocation_total() { |
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2192 // Verification is only guaranteed at a safepoint. |
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2193 if (SafepointSynchronize::is_at_safepoint()) { |
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2194 gclog_or_tty->print_cr("Chunk " PTR_FORMAT " allocation_total " SIZE_FORMAT |
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2195 " sum_used_in_chunks_in_use " SIZE_FORMAT, |
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2196 this, |
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2197 allocation_total(), |
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2198 sum_used_in_chunks_in_use()); |
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2199 } |
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2200 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2201 assert(allocation_total() == sum_used_in_chunks_in_use(), |
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2202 err_msg("allocation total is not consistent " SIZE_FORMAT |
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2203 " vs " SIZE_FORMAT, |
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2204 allocation_total(), sum_used_in_chunks_in_use())); |
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2205 } |
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2206 |
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2207 #endif |
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2208 |
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2209 void SpaceManager::dump(outputStream* const out) const { |
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2210 size_t curr_total = 0; |
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2211 size_t waste = 0; |
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2212 uint i = 0; |
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2213 size_t used = 0; |
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2214 size_t capacity = 0; |
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2215 |
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2216 // Add up statistics for all chunks in this SpaceManager. |
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2217 for (ChunkIndex index = ZeroIndex; |
6885 | 2218 index < NumberOfInUseLists; |
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2219 index = next_chunk_index(index)) { |
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2220 for (Metachunk* curr = chunks_in_use(index); |
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2221 curr != NULL; |
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2222 curr = curr->next()) { |
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2223 out->print("%d) ", i++); |
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2224 curr->print_on(out); |
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2225 if (TraceMetadataChunkAllocation && Verbose) { |
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2226 block_freelists()->print_on(out); |
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|
2227 } |
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2228 curr_total += curr->word_size(); |
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2229 used += curr->used_word_size(); |
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2230 capacity += curr->capacity_word_size(); |
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2231 waste += curr->free_word_size() + curr->overhead();; |
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2232 } |
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2233 } |
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2234 |
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2235 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
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2236 // Free space isn't wasted. |
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2237 waste -= free; |
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2238 |
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2239 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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2240 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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2241 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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2242 } |
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|
2243 |
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|
2244 #ifndef PRODUCT |
6725
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2245 void SpaceManager::mangle_freed_chunks() { |
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2246 for (ChunkIndex index = ZeroIndex; |
6885 | 2247 index < NumberOfInUseLists; |
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2248 index = next_chunk_index(index)) { |
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2249 for (Metachunk* curr = chunks_in_use(index); |
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2250 curr != NULL; |
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2251 curr = curr->next()) { |
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2252 curr->mangle(); |
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|
2253 } |
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2254 } |
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|
2255 } |
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|
2256 #endif // PRODUCT |
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2257 |
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2258 // MetaspaceAux |
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2259 |
6734 | 2260 size_t MetaspaceAux::used_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2261 size_t used = 0; |
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|
2262 ClassLoaderDataGraphMetaspaceIterator iter; |
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2263 while (iter.repeat()) { |
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|
2264 Metaspace* msp = iter.get_next(); |
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|
2265 // Sum allocation_total for each metaspace |
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|
2266 if (msp != NULL) { |
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|
2267 used += msp->used_words(mdtype); |
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|
2268 } |
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|
2269 } |
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|
2270 return used * BytesPerWord; |
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|
2271 } |
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|
2272 |
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2273 size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2274 size_t free = 0; |
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2275 ClassLoaderDataGraphMetaspaceIterator iter; |
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2276 while (iter.repeat()) { |
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2277 Metaspace* msp = iter.get_next(); |
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2278 if (msp != NULL) { |
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2279 free += msp->free_words(mdtype); |
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2280 } |
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|
2281 } |
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2282 return free * BytesPerWord; |
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|
2283 } |
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|
2284 |
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2285 size_t MetaspaceAux::capacity_in_bytes(Metaspace::MetadataType mdtype) { |
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2286 size_t capacity = free_chunks_total(mdtype); |
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|
2287 ClassLoaderDataGraphMetaspaceIterator iter; |
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2288 while (iter.repeat()) { |
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2289 Metaspace* msp = iter.get_next(); |
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2290 if (msp != NULL) { |
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2291 capacity += msp->capacity_words(mdtype); |
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2292 } |
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2293 } |
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|
2294 return capacity * BytesPerWord; |
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2295 } |
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|
2296 |
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2297 size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
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2298 size_t reserved = (mdtype == Metaspace::ClassType) ? |
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2299 Metaspace::class_space_list()->virtual_space_total() : |
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|
2300 Metaspace::space_list()->virtual_space_total(); |
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2301 return reserved * BytesPerWord; |
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|
2302 } |
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|
2303 |
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2304 size_t MetaspaceAux::min_chunk_size() { return Metaspace::first_chunk_word_size(); } |
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2305 |
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2306 size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
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2307 ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
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2308 Metaspace::class_space_list()->chunk_manager() : |
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2309 Metaspace::space_list()->chunk_manager(); |
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2310 chunk->slow_verify(); |
6725
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2311 return chunk->free_chunks_total(); |
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2312 } |
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2313 |
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2314 size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
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2315 return free_chunks_total(mdtype) * BytesPerWord; |
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2316 } |
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2317 |
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2318 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
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2319 gclog_or_tty->print(", [Metaspace:"); |
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2320 if (PrintGCDetails && Verbose) { |
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2321 gclog_or_tty->print(" " SIZE_FORMAT |
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2322 "->" SIZE_FORMAT |
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2323 "(" SIZE_FORMAT "/" SIZE_FORMAT ")", |
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2324 prev_metadata_used, |
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2325 used_in_bytes(), |
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2326 capacity_in_bytes(), |
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2327 reserved_in_bytes()); |
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2328 } else { |
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2329 gclog_or_tty->print(" " SIZE_FORMAT "K" |
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2330 "->" SIZE_FORMAT "K" |
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2331 "(" SIZE_FORMAT "K/" SIZE_FORMAT "K)", |
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2332 prev_metadata_used / K, |
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2333 used_in_bytes()/ K, |
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2334 capacity_in_bytes()/K, |
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2335 reserved_in_bytes()/ K); |
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2336 } |
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2337 |
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2338 gclog_or_tty->print("]"); |
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2339 } |
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2340 |
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2341 // This is printed when PrintGCDetails |
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2342 void MetaspaceAux::print_on(outputStream* out) { |
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2343 Metaspace::MetadataType ct = Metaspace::ClassType; |
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2344 Metaspace::MetadataType nct = Metaspace::NonClassType; |
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2345 |
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2346 out->print_cr(" Metaspace total " |
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2347 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2348 " reserved " SIZE_FORMAT "K", |
6734 | 2349 capacity_in_bytes()/K, used_in_bytes()/K, reserved_in_bytes()/K); |
6725
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2350 out->print_cr(" data space " |
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2351 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2352 " reserved " SIZE_FORMAT "K", |
6734 | 2353 capacity_in_bytes(nct)/K, used_in_bytes(nct)/K, reserved_in_bytes(nct)/K); |
6725
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2354 out->print_cr(" class space " |
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2355 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2356 " reserved " SIZE_FORMAT "K", |
6734 | 2357 capacity_in_bytes(ct)/K, used_in_bytes(ct)/K, reserved_in_bytes(ct)/K); |
6725
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2358 } |
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2359 |
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2360 // Print information for class space and data space separately. |
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2361 // This is almost the same as above. |
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2362 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
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2363 size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
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2364 size_t capacity_bytes = capacity_in_bytes(mdtype); |
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2365 size_t used_bytes = used_in_bytes(mdtype); |
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2366 size_t free_bytes = free_in_bytes(mdtype); |
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2367 size_t used_and_free = used_bytes + free_bytes + |
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2368 free_chunks_capacity_bytes; |
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2369 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
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2370 "K + unused in chunks " SIZE_FORMAT "K + " |
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2371 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
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2372 "K capacity in allocated chunks " SIZE_FORMAT "K", |
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2373 used_bytes / K, |
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2374 free_bytes / K, |
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2375 free_chunks_capacity_bytes / K, |
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2376 used_and_free / K, |
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|
2377 capacity_bytes / K); |
8738
1c88b99a2b01
8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation
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|
2378 // 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
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2379 assert(!SafepointSynchronize::is_at_safepoint() || used_and_free == capacity_bytes, "Accounting is wrong"); |
6725
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2380 } |
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|
2381 |
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2382 // Print total fragmentation for class and data metaspaces separately |
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2383 void MetaspaceAux::print_waste(outputStream* out) { |
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|
2384 |
7446
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2385 size_t specialized_waste = 0, small_waste = 0, medium_waste = 0, large_waste = 0; |
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2386 size_t specialized_count = 0, small_count = 0, medium_count = 0, large_count = 0; |
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2387 size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0, cls_large_waste = 0; |
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2388 size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_large_count = 0; |
6725
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|
2389 |
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2390 ClassLoaderDataGraphMetaspaceIterator iter; |
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2391 while (iter.repeat()) { |
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2392 Metaspace* msp = iter.get_next(); |
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2393 if (msp != NULL) { |
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2394 specialized_waste += msp->vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
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2395 specialized_count += msp->vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
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2396 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2397 small_count += msp->vsm()->sum_count_in_chunks_in_use(SmallIndex); |
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2398 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2399 medium_count += msp->vsm()->sum_count_in_chunks_in_use(MediumIndex); |
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2400 large_waste += msp->vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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2401 large_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
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2402 |
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2403 cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
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2404 cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
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2405 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2406 cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
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2407 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2408 cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
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2409 cls_large_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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2410 cls_large_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
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2411 } |
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2412 } |
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2413 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
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2414 out->print_cr(" data: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
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2415 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
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2416 SIZE_FORMAT " medium(s) " SIZE_FORMAT, |
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2417 specialized_count, specialized_waste, small_count, |
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2418 small_waste, medium_count, medium_waste); |
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2419 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
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2420 SIZE_FORMAT " small(s) " SIZE_FORMAT, |
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2421 cls_specialized_count, cls_specialized_waste, |
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2422 cls_small_count, cls_small_waste); |
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2423 } |
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2424 |
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2425 // Dump global metaspace things from the end of ClassLoaderDataGraph |
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2426 void MetaspaceAux::dump(outputStream* out) { |
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2427 out->print_cr("All Metaspace:"); |
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2428 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
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|
2429 out->print("class space: "); print_on(out, Metaspace::ClassType); |
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|
2430 print_waste(out); |
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|
2431 } |
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|
2432 |
6969
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2433 void MetaspaceAux::verify_free_chunks() { |
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2434 Metaspace::space_list()->chunk_manager()->verify(); |
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2435 Metaspace::class_space_list()->chunk_manager()->verify(); |
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2436 } |
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|
2437 |
6725
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2438 // Metaspace methods |
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|
2439 |
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2440 size_t Metaspace::_first_chunk_word_size = 0; |
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2441 size_t Metaspace::_first_class_chunk_word_size = 0; |
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|
2442 |
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2443 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
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2444 initialize(lock, type); |
6725
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|
2445 } |
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|
2446 |
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2447 Metaspace::~Metaspace() { |
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2448 delete _vsm; |
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|
2449 delete _class_vsm; |
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|
2450 } |
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|
2451 |
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2452 VirtualSpaceList* Metaspace::_space_list = NULL; |
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2453 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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2454 |
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|
2455 #define VIRTUALSPACEMULTIPLIER 2 |
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|
2456 |
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|
2457 void Metaspace::global_initialize() { |
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|
2458 // Initialize the alignment for shared spaces. |
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2459 int max_alignment = os::vm_page_size(); |
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|
2460 MetaspaceShared::set_max_alignment(max_alignment); |
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|
2461 |
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|
2462 if (DumpSharedSpaces) { |
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2463 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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2464 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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2465 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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2466 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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|
2467 |
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2468 // Initialize with the sum of the shared space sizes. The read-only |
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|
2469 // and read write metaspace chunks will be allocated out of this and the |
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2470 // remainder is the misc code and data chunks. |
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2471 size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
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2472 SharedMiscDataSize + SharedMiscCodeSize, |
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|
2473 os::vm_allocation_granularity()); |
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|
2474 size_t word_size = total/wordSize; |
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|
2475 _space_list = new VirtualSpaceList(word_size); |
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|
2476 } else { |
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2477 // If using shared space, open the file that contains the shared space |
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2478 // and map in the memory before initializing the rest of metaspace (so |
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|
2479 // the addresses don't conflict) |
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|
2480 if (UseSharedSpaces) { |
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|
2481 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
2482 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
2483 |
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2484 // Open the shared archive file, read and validate the header. If |
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2485 // initialization fails, shared spaces [UseSharedSpaces] are |
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|
2486 // disabled and the file is closed. |
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|
2487 // Map in spaces now also |
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|
2488 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
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|
2489 FileMapInfo::set_current_info(mapinfo); |
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|
2490 } else { |
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|
2491 assert(!mapinfo->is_open() && !UseSharedSpaces, |
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|
2492 "archive file not closed or shared spaces not disabled."); |
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|
2493 } |
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|
2494 } |
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|
2495 |
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|
2496 // Initialize these before initializing the VirtualSpaceList |
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|
2497 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
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|
2498 _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
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|
2499 // Make the first class chunk bigger than a medium chunk so it's not put |
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|
2500 // on the medium chunk list. The next chunk will be small and progress |
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|
2501 // from there. This size calculated by -version. |
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|
2502 _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
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|
2503 (ClassMetaspaceSize/BytesPerWord)*2); |
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|
2504 _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
6725
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|
2505 // Arbitrarily set the initial virtual space to a multiple |
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|
2506 // of the boot class loader size. |
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|
2507 size_t word_size = VIRTUALSPACEMULTIPLIER * first_chunk_word_size(); |
6725
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|
2508 // Initialize the list of virtual spaces. |
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|
2509 _space_list = new VirtualSpaceList(word_size); |
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|
2510 } |
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diff
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|
2511 } |
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|
2512 |
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|
2513 // For UseCompressedKlassPointers the class space is reserved as a piece of the |
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|
2514 // Java heap because the compression algorithm is the same for each. The |
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parents:
diff
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|
2515 // argument passed in is at the top of the compressed space |
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|
2516 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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diff
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|
2517 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
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|
2518 assert(rs.size() >= ClassMetaspaceSize, |
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
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7447
diff
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|
2519 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), ClassMetaspaceSize)); |
6725
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|
2520 _class_space_list = new VirtualSpaceList(rs); |
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diff
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|
2521 } |
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|
2522 |
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|
2523 void Metaspace::initialize(Mutex* lock, |
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|
2524 MetaspaceType type) { |
6725
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diff
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|
2525 |
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|
2526 assert(space_list() != NULL, |
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diff
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|
2527 "Metadata VirtualSpaceList has not been initialized"); |
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diff
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|
2528 |
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|
2529 _vsm = new SpaceManager(lock, space_list()); |
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diff
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|
2530 if (_vsm == NULL) { |
da91efe96a93
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diff
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|
2531 return; |
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diff
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|
2532 } |
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|
2533 size_t word_size; |
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|
2534 size_t class_word_size; |
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|
2535 vsm()->get_initial_chunk_sizes(type, |
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|
2536 &word_size, |
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|
2537 &class_word_size); |
6725
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|
2538 |
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|
2539 assert(class_space_list() != NULL, |
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|
2540 "Class VirtualSpaceList has not been initialized"); |
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|
2541 |
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diff
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|
2542 // Allocate SpaceManager for classes. |
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|
2543 _class_vsm = new SpaceManager(lock, class_space_list()); |
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|
2544 if (_class_vsm == NULL) { |
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diff
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|
2545 return; |
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diff
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|
2546 } |
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|
2547 |
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|
2548 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
2549 |
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diff
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|
2550 // Allocate chunk for metadata objects |
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|
2551 Metachunk* new_chunk = |
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|
2552 space_list()->get_initialization_chunk(word_size, |
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|
2553 vsm()->medium_chunk_bunch()); |
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|
2554 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
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|
2555 if (new_chunk != NULL) { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2556 // Add to this manager's list of chunks in use and current_chunk(). |
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diff
changeset
|
2557 vsm()->add_chunk(new_chunk, true); |
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diff
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|
2558 } |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2559 |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2560 // Allocate chunk for class metadata objects |
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diff
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|
2561 Metachunk* class_chunk = |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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7435
diff
changeset
|
2562 class_space_list()->get_initialization_chunk(class_word_size, |
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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7435
diff
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|
2563 class_vsm()->medium_chunk_bunch()); |
6725
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diff
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|
2564 if (class_chunk != NULL) { |
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diff
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|
2565 class_vsm()->add_chunk(class_chunk, true); |
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diff
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|
2566 } |
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diff
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|
2567 } |
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diff
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|
2568 |
7446
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|
2569 size_t Metaspace::align_word_size_up(size_t word_size) { |
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|
2570 size_t byte_size = word_size * wordSize; |
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|
2571 return ReservedSpace::allocation_align_size_up(byte_size) / wordSize; |
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diff
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|
2572 } |
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|
2573 |
6725
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|
2574 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
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diff
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|
2575 // DumpSharedSpaces doesn't use class metadata area (yet) |
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2576 if (mdtype == ClassType && !DumpSharedSpaces) { |
6885 | 2577 return class_vsm()->allocate(word_size); |
6725
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|
2578 } else { |
6885 | 2579 return vsm()->allocate(word_size); |
6725
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diff
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|
2580 } |
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|
2581 } |
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diff
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|
2582 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2583 MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
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|
2584 MetaWord* result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
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6736
diff
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|
2585 MetaspaceGC::set_expand_after_GC(true); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
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|
2586 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2587 size_t delta_words = MetaspaceGC::delta_capacity_until_GC(word_size); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
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diff
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|
2588 MetaspaceGC::inc_capacity_until_GC(delta_words); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2589 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2590 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
8da5e203b993
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jmasa
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6736
diff
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|
2591 " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
8da5e203b993
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|
2592 } |
6885 | 2593 |
6753
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|
2594 result = allocate(word_size, mdtype); |
8da5e203b993
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jmasa
parents:
6736
diff
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|
2595 |
8da5e203b993
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diff
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|
2596 return result; |
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jmasa
parents:
6736
diff
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|
2597 } |
8da5e203b993
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parents:
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diff
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|
2598 |
6725
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|
2599 // Space allocated in the Metaspace. This may |
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diff
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|
2600 // be across several metadata virtual spaces. |
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diff
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|
2601 char* Metaspace::bottom() const { |
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|
2602 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
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|
2603 return (char*)vsm()->current_chunk()->bottom(); |
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diff
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|
2604 } |
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|
2605 |
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|
2606 size_t Metaspace::used_words(MetadataType mdtype) const { |
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diff
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|
2607 // return vsm()->allocation_total(); |
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diff
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|
2608 return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
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diff
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|
2609 vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
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diff
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|
2610 } |
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diff
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|
2611 |
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|
2612 size_t Metaspace::free_words(MetadataType mdtype) const { |
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diff
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|
2613 return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
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|
2614 vsm()->sum_free_in_chunks_in_use(); |
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diff
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|
2615 } |
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diff
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|
2616 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2617 // Space capacity in the Metaspace. It includes |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2618 // space in the list of chunks from which allocations |
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coleenp
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diff
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|
2619 // have been made. Don't include space in the global freelist and |
da91efe96a93
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coleenp
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diff
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|
2620 // in the space available in the dictionary which |
da91efe96a93
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diff
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|
2621 // is already counted in some chunk. |
da91efe96a93
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diff
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|
2622 size_t Metaspace::capacity_words(MetadataType mdtype) const { |
da91efe96a93
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diff
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|
2623 return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
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|
2624 vsm()->sum_capacity_in_chunks_in_use(); |
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diff
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|
2625 } |
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diff
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|
2626 |
da91efe96a93
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diff
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|
2627 void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
da91efe96a93
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|
2628 if (SafepointSynchronize::is_at_safepoint()) { |
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diff
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|
2629 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 2630 // Don't take Heap_lock |
2631 MutexLocker ml(vsm()->lock()); | |
2632 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { | |
2633 // Dark matter. Too small for dictionary. | |
2634 #ifdef ASSERT | |
2635 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2636 #endif | |
2637 return; | |
6725
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diff
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|
2638 } |
6885 | 2639 if (is_class) { |
2640 class_vsm()->deallocate(ptr, word_size); | |
2641 } else { | |
2642 vsm()->deallocate(ptr, word_size); | |
2643 } | |
6725
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|
2644 } else { |
da91efe96a93
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diff
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|
2645 MutexLocker ml(vsm()->lock()); |
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|
2646 |
6885 | 2647 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
2648 // Dark matter. Too small for dictionary. | |
2649 #ifdef ASSERT | |
2650 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2651 #endif | |
2652 return; | |
6725
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diff
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|
2653 } |
6885 | 2654 if (is_class) { |
2655 class_vsm()->deallocate(ptr, word_size); | |
2656 } else { | |
2657 vsm()->deallocate(ptr, word_size); | |
2658 } | |
6725
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diff
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|
2659 } |
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diff
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|
2660 } |
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diff
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|
2661 |
6885 | 2662 Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
6725
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diff
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|
2663 bool read_only, MetadataType mdtype, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2664 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2665 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2666 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2667 } |
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diff
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|
2668 |
da91efe96a93
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diff
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|
2669 // SSS: Should we align the allocations and make sure the sizes are aligned. |
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diff
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|
2670 MetaWord* result = NULL; |
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diff
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|
2671 |
da91efe96a93
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|
2672 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
da91efe96a93
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diff
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|
2673 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
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diff
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|
2674 // Allocate in metaspaces without taking out a lock, because it deadlocks |
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parents:
diff
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|
2675 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
da91efe96a93
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parents:
diff
changeset
|
2676 // to revisit this for application class data sharing. |
da91efe96a93
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diff
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|
2677 if (DumpSharedSpaces) { |
da91efe96a93
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parents:
diff
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|
2678 if (read_only) { |
da91efe96a93
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diff
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|
2679 result = loader_data->ro_metaspace()->allocate(word_size, NonClassType); |
da91efe96a93
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diff
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|
2680 } else { |
da91efe96a93
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diff
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|
2681 result = loader_data->rw_metaspace()->allocate(word_size, NonClassType); |
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diff
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|
2682 } |
da91efe96a93
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diff
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|
2683 if (result == NULL) { |
da91efe96a93
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diff
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|
2684 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
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parents:
diff
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|
2685 } |
6885 | 2686 return Metablock::initialize(result, word_size); |
6725
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diff
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|
2687 } |
da91efe96a93
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diff
changeset
|
2688 |
da91efe96a93
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diff
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|
2689 result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
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diff
changeset
|
2690 |
da91efe96a93
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diff
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|
2691 if (result == NULL) { |
da91efe96a93
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parents:
diff
changeset
|
2692 // Try to clean out some memory and retry. |
da91efe96a93
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coleenp
parents:
diff
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|
2693 result = |
6885 | 2694 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
6725
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coleenp
parents:
diff
changeset
|
2695 loader_data, word_size, mdtype); |
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coleenp
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diff
changeset
|
2696 |
da91efe96a93
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diff
changeset
|
2697 // If result is still null, we are out of memory. |
da91efe96a93
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diff
changeset
|
2698 if (result == NULL) { |
7446
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7435
diff
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|
2699 if (Verbose && TraceMetadataChunkAllocation) { |
e51c9860cf66
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jmasa
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7435
diff
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|
2700 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
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7435
diff
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|
2701 SIZE_FORMAT, word_size); |
e51c9860cf66
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jmasa
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7435
diff
changeset
|
2702 if (loader_data->metaspace_or_null() != NULL) loader_data->metaspace_or_null()->dump(gclog_or_tty); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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2703 MetaspaceAux::dump(gclog_or_tty); |
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2704 } |
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2705 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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2706 report_java_out_of_memory("Metadata space"); |
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2707 |
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2708 if (JvmtiExport::should_post_resource_exhausted()) { |
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2709 JvmtiExport::post_resource_exhausted( |
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2710 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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2711 "Metadata space"); |
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2712 } |
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2713 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); |
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2714 } |
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2715 } |
6885 | 2716 return Metablock::initialize(result, word_size); |
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2717 } |
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2718 |
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2719 void Metaspace::print_on(outputStream* out) const { |
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2720 // Print both class virtual space counts and metaspace. |
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2721 if (Verbose) { |
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2722 vsm()->print_on(out); |
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2723 class_vsm()->print_on(out); |
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2724 } |
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2725 } |
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2726 |
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2727 bool Metaspace::contains(const void * ptr) { |
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2728 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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2729 return true; |
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2730 } |
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2731 // This is checked while unlocked. As long as the virtualspaces are added |
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2732 // at the end, the pointer will be in one of them. The virtual spaces |
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2733 // aren't deleted presently. When they are, some sort of locking might |
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2734 // be needed. Note, locking this can cause inversion problems with the |
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2735 // caller in MetaspaceObj::is_metadata() function. |
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2736 return space_list()->contains(ptr) || class_space_list()->contains(ptr); |
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2737 } |
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2738 |
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2739 void Metaspace::verify() { |
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2740 vsm()->verify(); |
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2741 class_vsm()->verify(); |
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2742 } |
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2743 |
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2744 void Metaspace::dump(outputStream* const out) const { |
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2745 if (UseMallocOnly) { |
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2746 // Just print usage for now |
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2747 out->print_cr("usage %d", used_words(Metaspace::NonClassType)); |
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2748 } |
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2749 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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2750 vsm()->dump(out); |
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2751 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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2752 class_vsm()->dump(out); |
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2753 } |