Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/metaspace.cpp @ 7591:c793367610c1
8005467: CDS size information is incorrect and unfriendly
Summary: Changed words to bytes, and added usage percentage information
Reviewed-by: coleenp, twisti
Contributed-by: ioi.lam@oracle.com
author | coleenp |
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date | Tue, 15 Jan 2013 17:05:53 -0500 |
parents | c71879335291 |
children | e51c9860cf66 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2012, 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 const size_t metadata_deallocate = 0xf5f5f5f5; |
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56 |
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57 MetaWord* last_allocated = 0; |
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58 |
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59 // Used in declarations in SpaceManager and ChunkManager |
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60 enum ChunkIndex { |
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61 SmallIndex = 0, |
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62 MediumIndex = 1, |
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63 HumongousIndex = 2, |
6885 | 64 NumberOfFreeLists = 2, |
65 NumberOfInUseLists = 3 | |
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66 }; |
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67 |
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68 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 69 assert(i < NumberOfInUseLists, "Out of bound"); |
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70 return (ChunkIndex) (i+1); |
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71 } |
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72 |
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73 // Originally _capacity_until_GC was set to MetaspaceSize here but |
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74 // the default MetaspaceSize before argument processing was being |
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75 // used which was not the desired value. See the code |
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76 // in should_expand() to see how the initialization is handled |
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77 // now. |
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78 size_t MetaspaceGC::_capacity_until_GC = 0; |
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79 bool MetaspaceGC::_expand_after_GC = false; |
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80 uint MetaspaceGC::_shrink_factor = 0; |
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81 bool MetaspaceGC::_should_concurrent_collect = false; |
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82 |
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83 // Blocks of space for metadata are allocated out of Metachunks. |
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84 // |
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85 // Metachunk are allocated out of MetadataVirtualspaces and once |
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86 // allocated there is no explicit link between a Metachunk and |
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87 // the MetadataVirtualspaces from which it was allocated. |
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88 // |
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89 // Each SpaceManager maintains a |
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90 // list of the chunks it is using and the current chunk. The current |
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91 // chunk is the chunk from which allocations are done. Space freed in |
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92 // a chunk is placed on the free list of blocks (BlockFreelist) and |
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93 // reused from there. |
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94 |
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95 // Pointer to list of Metachunks. |
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96 class ChunkList VALUE_OBJ_CLASS_SPEC { |
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97 // List of free chunks |
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98 Metachunk* _head; |
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99 |
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100 public: |
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101 // Constructor |
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102 ChunkList() : _head(NULL) {} |
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103 |
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104 // Accessors |
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105 Metachunk* head() { return _head; } |
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106 void set_head(Metachunk* v) { _head = v; } |
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107 |
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108 // Link at head of the list |
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109 void add_at_head(Metachunk* head, Metachunk* tail); |
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110 void add_at_head(Metachunk* head); |
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111 |
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112 size_t sum_list_size(); |
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113 size_t sum_list_count(); |
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114 size_t sum_list_capacity(); |
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115 }; |
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116 |
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117 // Manages the global free lists of chunks. |
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118 // Has three lists of free chunks, and a total size and |
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119 // count that includes all three |
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120 |
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121 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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122 |
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123 // Free list of chunks of different sizes. |
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124 // SmallChunk |
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125 // MediumChunk |
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126 // HumongousChunk |
6885 | 127 ChunkList _free_chunks[NumberOfFreeLists]; |
128 | |
129 // HumongousChunk | |
130 ChunkTreeDictionary _humongous_dictionary; | |
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131 |
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132 // ChunkManager in all lists of this type |
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133 size_t _free_chunks_total; |
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134 size_t _free_chunks_count; |
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135 |
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136 void dec_free_chunks_total(size_t v) { |
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137 assert(_free_chunks_count > 0 && |
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138 _free_chunks_total > 0, |
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139 "About to go negative"); |
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140 Atomic::add_ptr(-1, &_free_chunks_count); |
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141 jlong minus_v = (jlong) - (jlong) v; |
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142 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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143 } |
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144 |
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145 // Debug support |
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146 |
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147 size_t sum_free_chunks(); |
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148 size_t sum_free_chunks_count(); |
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149 |
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150 void locked_verify_free_chunks_total(); |
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151 void slow_locked_verify_free_chunks_total() { |
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152 if (metaspace_slow_verify) { |
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153 locked_verify_free_chunks_total(); |
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154 } |
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155 } |
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156 void locked_verify_free_chunks_count(); |
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157 void slow_locked_verify_free_chunks_count() { |
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158 if (metaspace_slow_verify) { |
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159 locked_verify_free_chunks_count(); |
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160 } |
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161 } |
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162 void verify_free_chunks_count(); |
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163 |
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164 public: |
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165 |
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166 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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167 |
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168 // add or delete (return) a chunk to the global freelist. |
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169 Metachunk* chunk_freelist_allocate(size_t word_size); |
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170 void chunk_freelist_deallocate(Metachunk* chunk); |
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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 } |
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183 ChunkList* free_medium_chunks() { return &_free_chunks[1]; } |
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184 ChunkList* free_small_chunks() { return &_free_chunks[0]; } |
6885 | 185 ChunkTreeDictionary* humongous_dictionary() { |
186 return &_humongous_dictionary; | |
187 } | |
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188 |
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189 ChunkList* free_chunks(ChunkIndex index); |
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190 |
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191 // Returns the list for the given chunk word size. |
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192 ChunkList* find_free_chunks_list(size_t word_size); |
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193 |
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194 // Add and remove from a list by size. Selects |
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195 // list based on size of chunk. |
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196 void free_chunks_put(Metachunk* chuck); |
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197 Metachunk* free_chunks_get(size_t chunk_word_size); |
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198 |
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199 // Debug support |
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200 void verify(); |
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201 void slow_verify() { |
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202 if (metaspace_slow_verify) { |
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203 verify(); |
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204 } |
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205 } |
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206 void locked_verify(); |
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207 void slow_locked_verify() { |
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208 if (metaspace_slow_verify) { |
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209 locked_verify(); |
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210 } |
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211 } |
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212 void verify_free_chunks_total(); |
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213 |
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214 void locked_print_free_chunks(outputStream* st); |
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215 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 216 |
217 void print_on(outputStream* st); | |
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218 }; |
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219 |
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220 |
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221 // Used to manage the free list of Metablocks (a block corresponds |
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222 // to the allocation of a quantum of metadata). |
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223 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 224 BlockTreeDictionary* _dictionary; |
225 static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); | |
226 | |
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227 // Accessors |
6885 | 228 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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229 |
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230 public: |
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231 BlockFreelist(); |
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232 ~BlockFreelist(); |
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233 |
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234 // Get and return a block to the free list |
6885 | 235 MetaWord* get_block(size_t word_size); |
236 void return_block(MetaWord* p, size_t word_size); | |
237 | |
238 size_t total_size() { | |
239 if (dictionary() == NULL) { | |
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240 return 0; |
6885 | 241 } else { |
242 return dictionary()->total_size(); | |
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243 } |
6885 | 244 } |
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245 |
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246 void print_on(outputStream* st) const; |
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247 }; |
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248 |
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249 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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250 friend class VirtualSpaceList; |
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251 |
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252 // Link to next VirtualSpaceNode |
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253 VirtualSpaceNode* _next; |
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254 |
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255 // total in the VirtualSpace |
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256 MemRegion _reserved; |
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257 ReservedSpace _rs; |
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258 VirtualSpace _virtual_space; |
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259 MetaWord* _top; |
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260 |
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261 // Convenience functions for logical bottom and end |
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262 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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263 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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264 |
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265 // Convenience functions to access the _virtual_space |
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266 char* low() const { return virtual_space()->low(); } |
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267 char* high() const { return virtual_space()->high(); } |
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268 |
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269 public: |
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270 |
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271 VirtualSpaceNode(size_t byte_size); |
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272 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs) {} |
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273 ~VirtualSpaceNode(); |
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274 |
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275 // address of next available space in _virtual_space; |
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276 // Accessors |
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277 VirtualSpaceNode* next() { return _next; } |
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278 void set_next(VirtualSpaceNode* v) { _next = v; } |
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279 |
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280 void set_reserved(MemRegion const v) { _reserved = v; } |
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281 void set_top(MetaWord* v) { _top = v; } |
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282 |
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283 // Accessors |
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284 MemRegion* reserved() { return &_reserved; } |
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285 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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286 |
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287 // Returns true if "word_size" is available in the virtual space |
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288 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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289 |
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290 MetaWord* top() const { return _top; } |
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291 void inc_top(size_t word_size) { _top += word_size; } |
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292 |
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293 // used and capacity in this single entry in the list |
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294 size_t used_words_in_vs() const; |
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295 size_t capacity_words_in_vs() const; |
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296 |
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297 bool initialize(); |
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298 |
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299 // get space from the virtual space |
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300 Metachunk* take_from_committed(size_t chunk_word_size); |
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301 |
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302 // Allocate a chunk from the virtual space and return it. |
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303 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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304 Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
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305 |
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306 // Expands/shrinks the committed space in a virtual space. Delegates |
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307 // to Virtualspace |
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308 bool expand_by(size_t words, bool pre_touch = false); |
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309 bool shrink_by(size_t words); |
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310 |
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311 #ifdef ASSERT |
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312 // Debug support |
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313 static void verify_virtual_space_total(); |
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314 static void verify_virtual_space_count(); |
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315 void mangle(); |
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316 #endif |
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317 |
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318 void print_on(outputStream* st) const; |
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319 }; |
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320 |
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321 // byte_size is the size of the associated virtualspace. |
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322 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0) { |
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323 // This allocates memory with mmap. For DumpSharedspaces, allocate the |
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324 // space at low memory so that other shared images don't conflict. |
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325 // This is the same address as memory needed for UseCompressedOops but |
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326 // compressed oops don't work with CDS (offsets in metadata are wrong), so |
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327 // borrow the same address. |
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328 if (DumpSharedSpaces) { |
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329 char* shared_base = (char*)HeapBaseMinAddress; |
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330 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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331 if (_rs.is_reserved()) { |
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332 assert(_rs.base() == shared_base, "should match"); |
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333 } else { |
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334 // If we are dumping the heap, then allocate a wasted block of address |
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335 // space in order to push the heap to a lower address. This extra |
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336 // address range allows for other (or larger) libraries to be loaded |
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337 // without them occupying the space required for the shared spaces. |
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338 uintx reserved = 0; |
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339 uintx block_size = 64*1024*1024; |
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340 while (reserved < SharedDummyBlockSize) { |
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341 char* dummy = os::reserve_memory(block_size); |
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342 reserved += block_size; |
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343 } |
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344 _rs = ReservedSpace(byte_size); |
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345 } |
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346 MetaspaceShared::set_shared_rs(&_rs); |
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347 } else { |
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348 _rs = ReservedSpace(byte_size); |
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349 } |
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350 |
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351 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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352 } |
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353 |
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354 // List of VirtualSpaces for metadata allocation. |
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355 // It has a _next link for singly linked list and a MemRegion |
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356 // for total space in the VirtualSpace. |
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357 class VirtualSpaceList : public CHeapObj<mtClass> { |
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358 friend class VirtualSpaceNode; |
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359 |
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360 enum VirtualSpaceSizes { |
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361 VirtualSpaceSize = 256 * K |
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362 }; |
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363 |
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364 // Global list of virtual spaces |
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365 // Head of the list |
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366 VirtualSpaceNode* _virtual_space_list; |
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367 // virtual space currently being used for allocations |
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368 VirtualSpaceNode* _current_virtual_space; |
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369 // Free chunk list for all other metadata |
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370 ChunkManager _chunk_manager; |
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371 |
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372 // Can this virtual list allocate >1 spaces? Also, used to determine |
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373 // whether to allocate unlimited small chunks in this virtual space |
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374 bool _is_class; |
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375 bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
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376 |
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377 // Sum of space in all virtual spaces and number of virtual spaces |
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378 size_t _virtual_space_total; |
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379 size_t _virtual_space_count; |
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380 |
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381 ~VirtualSpaceList(); |
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382 |
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383 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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384 |
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385 void set_virtual_space_list(VirtualSpaceNode* v) { |
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386 _virtual_space_list = v; |
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387 } |
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388 void set_current_virtual_space(VirtualSpaceNode* v) { |
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389 _current_virtual_space = v; |
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390 } |
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391 |
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392 void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
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393 |
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394 // Get another virtual space and add it to the list. This |
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395 // is typically prompted by a failed attempt to allocate a chunk |
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396 // and is typically followed by the allocation of a chunk. |
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397 bool grow_vs(size_t vs_word_size); |
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398 |
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399 public: |
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400 VirtualSpaceList(size_t word_size); |
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401 VirtualSpaceList(ReservedSpace rs); |
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402 |
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403 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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404 |
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405 VirtualSpaceNode* current_virtual_space() { |
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406 return _current_virtual_space; |
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407 } |
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408 |
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409 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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410 bool is_class() const { return _is_class; } |
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411 |
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412 // Allocate the first virtualspace. |
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413 void initialize(size_t word_size); |
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414 |
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415 size_t virtual_space_total() { return _virtual_space_total; } |
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416 void inc_virtual_space_total(size_t v) { |
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417 Atomic::add_ptr(v, &_virtual_space_total); |
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418 } |
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419 |
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420 size_t virtual_space_count() { return _virtual_space_count; } |
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421 void inc_virtual_space_count() { |
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422 Atomic::inc_ptr(&_virtual_space_count); |
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423 } |
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424 |
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425 // Used and capacity in the entire list of virtual spaces. |
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426 // These are global values shared by all Metaspaces |
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427 size_t capacity_words_sum(); |
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428 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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429 size_t used_words_sum(); |
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430 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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431 |
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432 bool contains(const void *ptr); |
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433 |
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434 void print_on(outputStream* st) const; |
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435 |
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436 class VirtualSpaceListIterator : public StackObj { |
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437 VirtualSpaceNode* _virtual_spaces; |
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438 public: |
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439 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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440 _virtual_spaces(virtual_spaces) {} |
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441 |
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442 bool repeat() { |
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443 return _virtual_spaces != NULL; |
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444 } |
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445 |
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446 VirtualSpaceNode* get_next() { |
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447 VirtualSpaceNode* result = _virtual_spaces; |
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448 if (_virtual_spaces != NULL) { |
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449 _virtual_spaces = _virtual_spaces->next(); |
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450 } |
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451 return result; |
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452 } |
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453 }; |
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454 }; |
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455 |
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456 class Metadebug : AllStatic { |
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457 // Debugging support for Metaspaces |
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458 static int _deallocate_block_a_lot_count; |
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459 static int _deallocate_chunk_a_lot_count; |
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460 static int _allocation_fail_alot_count; |
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461 |
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462 public: |
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463 static int deallocate_block_a_lot_count() { |
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464 return _deallocate_block_a_lot_count; |
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465 } |
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466 static void set_deallocate_block_a_lot_count(int v) { |
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467 _deallocate_block_a_lot_count = v; |
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468 } |
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469 static void inc_deallocate_block_a_lot_count() { |
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470 _deallocate_block_a_lot_count++; |
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471 } |
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472 static int deallocate_chunk_a_lot_count() { |
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473 return _deallocate_chunk_a_lot_count; |
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474 } |
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475 static void reset_deallocate_chunk_a_lot_count() { |
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476 _deallocate_chunk_a_lot_count = 1; |
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477 } |
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478 static void inc_deallocate_chunk_a_lot_count() { |
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479 _deallocate_chunk_a_lot_count++; |
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480 } |
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481 |
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482 static void init_allocation_fail_alot_count(); |
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483 #ifdef ASSERT |
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484 static bool test_metadata_failure(); |
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485 #endif |
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486 |
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487 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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488 size_t chunk_word_size); |
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489 static void deallocate_block_a_lot(SpaceManager* sm, |
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490 size_t chunk_word_size); |
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491 |
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492 }; |
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493 |
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494 int Metadebug::_deallocate_block_a_lot_count = 0; |
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495 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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496 int Metadebug::_allocation_fail_alot_count = 0; |
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497 |
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498 // SpaceManager - used by Metaspace to handle allocations |
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499 class SpaceManager : public CHeapObj<mtClass> { |
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500 friend class Metaspace; |
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501 friend class Metadebug; |
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502 |
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503 private: |
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504 // protects allocations and contains. |
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505 Mutex* const _lock; |
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506 |
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507 // List of chunks in use by this SpaceManager. Allocations |
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508 // are done from the current chunk. The list is used for deallocating |
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509 // chunks when the SpaceManager is freed. |
6885 | 510 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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511 Metachunk* _current_chunk; |
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512 |
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513 // Virtual space where allocation comes from. |
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514 VirtualSpaceList* _vs_list; |
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515 |
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516 // Number of small chunks to allocate to a manager |
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517 // If class space manager, small chunks are unlimited |
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518 static uint const _small_chunk_limit; |
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519 bool has_small_chunk_limit() { return !vs_list()->is_class(); } |
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520 |
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521 // Sum of all space in allocated chunks |
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522 size_t _allocation_total; |
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523 |
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524 // Free lists of blocks are per SpaceManager since they |
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525 // are assumed to be in chunks in use by the SpaceManager |
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526 // and all chunks in use by a SpaceManager are freed when |
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527 // the class loader using the SpaceManager is collected. |
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528 BlockFreelist _block_freelists; |
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529 |
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530 // protects virtualspace and chunk expansions |
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531 static const char* _expand_lock_name; |
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532 static const int _expand_lock_rank; |
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533 static Mutex* const _expand_lock; |
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534 |
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535 // Accessors |
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536 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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537 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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538 |
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539 BlockFreelist* block_freelists() const { |
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540 return (BlockFreelist*) &_block_freelists; |
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541 } |
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542 |
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543 VirtualSpaceList* vs_list() const { return _vs_list; } |
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544 |
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545 Metachunk* current_chunk() const { return _current_chunk; } |
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546 void set_current_chunk(Metachunk* v) { |
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547 _current_chunk = v; |
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548 } |
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549 |
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550 Metachunk* find_current_chunk(size_t word_size); |
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551 |
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552 // Add chunk to the list of chunks in use |
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553 void add_chunk(Metachunk* v, bool make_current); |
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554 |
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555 Mutex* lock() const { return _lock; } |
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556 |
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557 public: |
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558 SpaceManager(Mutex* lock, VirtualSpaceList* vs_list); |
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559 ~SpaceManager(); |
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560 |
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561 enum ChunkSizes { // in words. |
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562 SmallChunk = 512, |
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563 MediumChunk = 8 * K, |
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564 MediumChunkBunch = 4 * MediumChunk |
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565 }; |
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566 |
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567 // Accessors |
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568 size_t allocation_total() const { return _allocation_total; } |
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569 void inc_allocation_total(size_t v) { Atomic::add_ptr(v, &_allocation_total); } |
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570 static bool is_humongous(size_t word_size) { return word_size > MediumChunk; } |
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571 |
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572 static Mutex* expand_lock() { return _expand_lock; } |
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573 |
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574 size_t sum_capacity_in_chunks_in_use() const; |
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575 size_t sum_used_in_chunks_in_use() const; |
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576 size_t sum_free_in_chunks_in_use() const; |
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577 size_t sum_waste_in_chunks_in_use() const; |
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578 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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579 |
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580 size_t sum_count_in_chunks_in_use(); |
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581 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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582 |
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583 // Block allocation and deallocation. |
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584 // Allocates a block from the current chunk |
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585 MetaWord* allocate(size_t word_size); |
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586 |
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587 // Helper for allocations |
6885 | 588 MetaWord* allocate_work(size_t word_size); |
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589 |
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590 // Returns a block to the per manager freelist |
6885 | 591 void deallocate(MetaWord* p, size_t word_size); |
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592 |
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593 // Based on the allocation size and a minimum chunk size, |
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594 // returned chunk size (for expanding space for chunk allocation). |
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595 size_t calc_chunk_size(size_t allocation_word_size); |
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596 |
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597 // Called when an allocation from the current chunk fails. |
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598 // Gets a new chunk (may require getting a new virtual space), |
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599 // and allocates from that chunk. |
6885 | 600 MetaWord* grow_and_allocate(size_t word_size); |
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601 |
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602 // debugging support. |
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603 |
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604 void dump(outputStream* const out) const; |
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605 void print_on(outputStream* st) const; |
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606 void locked_print_chunks_in_use_on(outputStream* st) const; |
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607 |
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608 void verify(); |
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609 void verify_chunk_size(Metachunk* chunk); |
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610 NOT_PRODUCT(void mangle_freed_chunks();) |
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611 #ifdef ASSERT |
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612 void verify_allocation_total(); |
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613 #endif |
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614 }; |
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615 |
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616 uint const SpaceManager::_small_chunk_limit = 4; |
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617 |
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618 const char* SpaceManager::_expand_lock_name = |
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619 "SpaceManager chunk allocation lock"; |
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620 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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621 Mutex* const SpaceManager::_expand_lock = |
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622 new Mutex(SpaceManager::_expand_lock_rank, |
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623 SpaceManager::_expand_lock_name, |
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624 Mutex::_allow_vm_block_flag); |
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625 |
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626 // BlockFreelist methods |
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627 |
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628 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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629 |
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630 BlockFreelist::~BlockFreelist() { |
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631 if (_dictionary != NULL) { |
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632 if (Verbose && TraceMetadataChunkAllocation) { |
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633 _dictionary->print_free_lists(gclog_or_tty); |
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634 } |
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635 delete _dictionary; |
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636 } |
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637 } |
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638 |
6885 | 639 Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
640 Metablock* block = (Metablock*) p; | |
641 block->set_word_size(word_size); | |
642 block->set_prev(NULL); | |
643 block->set_next(NULL); | |
644 | |
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645 return block; |
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646 } |
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647 |
6885 | 648 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
649 Metablock* free_chunk = initialize_free_chunk(p, word_size); | |
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650 if (dictionary() == NULL) { |
6885 | 651 _dictionary = new BlockTreeDictionary(); |
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652 } |
6885 | 653 dictionary()->return_chunk(free_chunk); |
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654 } |
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655 |
6885 | 656 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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657 if (dictionary() == NULL) { |
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658 return NULL; |
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659 } |
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660 |
6885 | 661 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
662 // Dark matter. Too small for dictionary. | |
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663 return NULL; |
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664 } |
6885 | 665 |
666 Metablock* free_block = | |
667 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::exactly); | |
668 if (free_block == NULL) { | |
669 return NULL; | |
670 } | |
671 | |
672 return (MetaWord*) free_block; | |
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673 } |
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674 |
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675 void BlockFreelist::print_on(outputStream* st) const { |
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676 if (dictionary() == NULL) { |
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677 return; |
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678 } |
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679 dictionary()->print_free_lists(st); |
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680 } |
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681 |
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682 // VirtualSpaceNode methods |
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683 |
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684 VirtualSpaceNode::~VirtualSpaceNode() { |
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685 _rs.release(); |
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686 } |
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687 |
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688 size_t VirtualSpaceNode::used_words_in_vs() const { |
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689 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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690 } |
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691 |
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692 // Space committed in the VirtualSpace |
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693 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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694 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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695 } |
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696 |
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697 |
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698 // Allocates the chunk from the virtual space only. |
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699 // This interface is also used internally for debugging. Not all |
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700 // chunks removed here are necessarily used for allocation. |
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701 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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702 // Bottom of the new chunk |
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703 MetaWord* chunk_limit = top(); |
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704 assert(chunk_limit != NULL, "Not safe to call this method"); |
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705 |
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706 if (!is_available(chunk_word_size)) { |
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707 if (TraceMetadataChunkAllocation) { |
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708 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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709 // Dump some information about the virtual space that is nearly full |
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710 print_on(tty); |
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711 } |
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712 return NULL; |
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713 } |
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714 |
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715 // Take the space (bump top on the current virtual space). |
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716 inc_top(chunk_word_size); |
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717 |
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718 // Point the chunk at the space |
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719 Metachunk* result = Metachunk::initialize(chunk_limit, chunk_word_size); |
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720 return result; |
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721 } |
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|
722 |
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723 |
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724 // Expand the virtual space (commit more of the reserved space) |
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725 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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726 size_t bytes = words * BytesPerWord; |
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727 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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728 if (TraceMetavirtualspaceAllocation && !result) { |
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729 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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730 "for byte size " SIZE_FORMAT, bytes); |
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731 virtual_space()->print(); |
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732 } |
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733 return result; |
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734 } |
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|
735 |
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736 // Shrink the virtual space (commit more of the reserved space) |
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737 bool VirtualSpaceNode::shrink_by(size_t words) { |
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738 size_t bytes = words * BytesPerWord; |
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739 virtual_space()->shrink_by(bytes); |
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740 return true; |
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741 } |
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742 |
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743 // Add another chunk to the chunk list. |
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744 |
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745 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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746 assert_lock_strong(SpaceManager::expand_lock()); |
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747 Metachunk* result = NULL; |
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748 |
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749 return take_from_committed(chunk_word_size); |
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750 } |
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751 |
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752 Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
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753 assert_lock_strong(SpaceManager::expand_lock()); |
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754 |
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755 Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
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756 |
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757 if (new_chunk == NULL) { |
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758 // Only a small part of the virtualspace is committed when first |
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759 // allocated so committing more here can be expected. |
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760 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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761 size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
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762 page_size_words); |
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763 expand_by(aligned_expand_vs_by_words, false); |
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764 new_chunk = get_chunk_vs(chunk_word_size); |
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765 } |
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766 return new_chunk; |
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767 } |
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768 |
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769 bool VirtualSpaceNode::initialize() { |
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770 |
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771 if (!_rs.is_reserved()) { |
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772 return false; |
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773 } |
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774 |
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775 // Commit only 1 page instead of the whole reserved space _rs.size() |
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776 size_t committed_byte_size = os::vm_page_size(); |
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777 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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778 if (result) { |
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779 set_top((MetaWord*)virtual_space()->low()); |
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780 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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781 (HeapWord*)(_rs.base() + _rs.size()))); |
6726
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782 |
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783 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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784 err_msg("Reserved start was not set properly " PTR_FORMAT |
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785 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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786 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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787 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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788 " != " SIZE_FORMAT, reserved()->word_size(), |
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789 _rs.size() / BytesPerWord)); |
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790 } |
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|
791 |
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792 return result; |
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793 } |
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|
794 |
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795 void VirtualSpaceNode::print_on(outputStream* st) const { |
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796 size_t used = used_words_in_vs(); |
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797 size_t capacity = capacity_words_in_vs(); |
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798 VirtualSpace* vs = virtual_space(); |
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799 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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800 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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801 PTR_FORMAT ", " PTR_FORMAT ")", |
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|
802 vs, capacity / K, used * 100 / capacity, |
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|
803 bottom(), top(), end(), |
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|
804 vs->high_boundary()); |
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|
805 } |
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|
806 |
7185
90273fc0a981
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6969
diff
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|
807 #ifdef ASSERT |
6725
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808 void VirtualSpaceNode::mangle() { |
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809 size_t word_size = capacity_words_in_vs(); |
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810 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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811 } |
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6969
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|
812 #endif // ASSERT |
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813 |
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814 // VirtualSpaceList methods |
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815 // Space allocated from the VirtualSpace |
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|
816 |
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817 VirtualSpaceList::~VirtualSpaceList() { |
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818 VirtualSpaceListIterator iter(virtual_space_list()); |
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819 while (iter.repeat()) { |
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820 VirtualSpaceNode* vsl = iter.get_next(); |
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821 delete vsl; |
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|
822 } |
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823 } |
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824 |
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825 size_t VirtualSpaceList::used_words_sum() { |
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826 size_t allocated_by_vs = 0; |
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827 VirtualSpaceListIterator iter(virtual_space_list()); |
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828 while (iter.repeat()) { |
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829 VirtualSpaceNode* vsl = iter.get_next(); |
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830 // Sum used region [bottom, top) in each virtualspace |
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831 allocated_by_vs += vsl->used_words_in_vs(); |
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832 } |
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833 assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
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834 err_msg("Total in free chunks " SIZE_FORMAT |
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835 " greater than total from virtual_spaces " SIZE_FORMAT, |
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836 allocated_by_vs, chunk_manager()->free_chunks_total())); |
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837 size_t used = |
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838 allocated_by_vs - chunk_manager()->free_chunks_total(); |
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839 return used; |
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|
840 } |
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|
841 |
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842 // Space available in all MetadataVirtualspaces allocated |
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843 // for metadata. This is the upper limit on the capacity |
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844 // of chunks allocated out of all the MetadataVirtualspaces. |
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845 size_t VirtualSpaceList::capacity_words_sum() { |
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846 size_t capacity = 0; |
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|
847 VirtualSpaceListIterator iter(virtual_space_list()); |
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|
848 while (iter.repeat()) { |
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849 VirtualSpaceNode* vsl = iter.get_next(); |
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850 capacity += vsl->capacity_words_in_vs(); |
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851 } |
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852 return capacity; |
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853 } |
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854 |
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855 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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856 _is_class(false), |
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857 _virtual_space_list(NULL), |
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858 _current_virtual_space(NULL), |
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859 _virtual_space_total(0), |
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860 _virtual_space_count(0) { |
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861 MutexLockerEx cl(SpaceManager::expand_lock(), |
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862 Mutex::_no_safepoint_check_flag); |
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863 bool initialization_succeeded = grow_vs(word_size); |
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864 |
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865 assert(initialization_succeeded, |
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866 " VirtualSpaceList initialization should not fail"); |
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867 } |
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868 |
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869 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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870 _is_class(true), |
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871 _virtual_space_list(NULL), |
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872 _current_virtual_space(NULL), |
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873 _virtual_space_total(0), |
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874 _virtual_space_count(0) { |
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875 MutexLockerEx cl(SpaceManager::expand_lock(), |
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876 Mutex::_no_safepoint_check_flag); |
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877 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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878 bool succeeded = class_entry->initialize(); |
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879 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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880 link_vs(class_entry, rs.size()/BytesPerWord); |
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881 } |
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882 |
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883 // Allocate another meta virtual space and add it to the list. |
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884 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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885 assert_lock_strong(SpaceManager::expand_lock()); |
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886 if (vs_word_size == 0) { |
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887 return false; |
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888 } |
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889 // Reserve the space |
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890 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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891 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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892 |
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893 // Allocate the meta virtual space and initialize it. |
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894 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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895 if (!new_entry->initialize()) { |
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896 delete new_entry; |
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897 return false; |
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898 } else { |
7176
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899 // ensure lock-free iteration sees fully initialized node |
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6969
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900 OrderAccess::storestore(); |
6725
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901 link_vs(new_entry, vs_word_size); |
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902 return true; |
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903 } |
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904 } |
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905 |
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906 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
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907 if (virtual_space_list() == NULL) { |
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908 set_virtual_space_list(new_entry); |
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909 } else { |
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910 current_virtual_space()->set_next(new_entry); |
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911 } |
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912 set_current_virtual_space(new_entry); |
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913 inc_virtual_space_total(vs_word_size); |
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914 inc_virtual_space_count(); |
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915 #ifdef ASSERT |
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916 new_entry->mangle(); |
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917 #endif |
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918 if (TraceMetavirtualspaceAllocation && Verbose) { |
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919 VirtualSpaceNode* vsl = current_virtual_space(); |
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920 vsl->print_on(tty); |
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921 } |
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922 } |
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923 |
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924 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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925 size_t grow_chunks_by_words) { |
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|
926 |
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927 // Get a chunk from the chunk freelist |
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928 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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|
929 |
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930 // Allocate a chunk out of the current virtual space. |
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|
931 if (next == NULL) { |
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932 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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933 } |
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|
934 |
da91efe96a93
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|
935 if (next == NULL) { |
da91efe96a93
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parents:
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|
936 // Not enough room in current virtual space. Try to commit |
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|
937 // more space. |
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|
938 size_t expand_vs_by_words = MAX2((size_t)SpaceManager::MediumChunkBunch, |
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coleenp
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939 grow_chunks_by_words); |
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940 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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941 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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|
942 page_size_words); |
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|
943 bool vs_expanded = |
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944 current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
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945 if (!vs_expanded) { |
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|
946 // Should the capacity of the metaspaces be expanded for |
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947 // this allocation? If it's the virtual space for classes and is |
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948 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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949 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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950 // Get another virtual space. |
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|
951 size_t grow_vs_words = |
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952 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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953 if (grow_vs(grow_vs_words)) { |
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954 // Got it. It's on the list now. Get a chunk from it. |
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955 next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
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956 } |
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957 if (TraceMetadataHumongousAllocation && SpaceManager::is_humongous(word_size)) { |
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958 gclog_or_tty->print_cr(" aligned_expand_vs_by_words " PTR_FORMAT, |
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959 aligned_expand_vs_by_words); |
da91efe96a93
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960 gclog_or_tty->print_cr(" grow_vs_words " PTR_FORMAT, |
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|
961 grow_vs_words); |
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|
962 } |
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|
963 } else { |
da91efe96a93
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964 // Allocation will fail and induce a GC |
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|
965 if (TraceMetadataChunkAllocation && Verbose) { |
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|
966 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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967 " Fail instead of expand the metaspace"); |
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|
968 } |
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|
969 } |
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|
970 } else { |
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|
971 // The virtual space expanded, get a new chunk |
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|
972 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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973 assert(next != NULL, "Just expanded, should succeed"); |
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974 } |
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|
975 } |
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|
976 |
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|
977 return next; |
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|
978 } |
da91efe96a93
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|
979 |
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|
980 void VirtualSpaceList::print_on(outputStream* st) const { |
da91efe96a93
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|
981 if (TraceMetadataChunkAllocation && Verbose) { |
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|
982 VirtualSpaceListIterator iter(virtual_space_list()); |
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|
983 while (iter.repeat()) { |
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984 VirtualSpaceNode* node = iter.get_next(); |
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985 node->print_on(st); |
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986 } |
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987 } |
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988 } |
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989 |
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990 bool VirtualSpaceList::contains(const void *ptr) { |
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991 VirtualSpaceNode* list = virtual_space_list(); |
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992 VirtualSpaceListIterator iter(list); |
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993 while (iter.repeat()) { |
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994 VirtualSpaceNode* node = iter.get_next(); |
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995 if (node->reserved()->contains(ptr)) { |
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996 return true; |
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997 } |
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998 } |
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999 return false; |
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1000 } |
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1001 |
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1002 |
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1003 // MetaspaceGC methods |
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1004 |
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1005 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1006 // Within the VM operation after the GC the attempt to allocate the metadata |
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1007 // should succeed. If the GC did not free enough space for the metaspace |
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1008 // allocation, the HWM is increased so that another virtualspace will be |
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1009 // allocated for the metadata. With perm gen the increase in the perm |
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1010 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1011 // metaspace policy uses those as the small and large steps for the HWM. |
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1012 // |
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1013 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1014 // resize the capacity of the metaspaces. The current implementation |
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1015 // is based on the flags MinHeapFreeRatio and MaxHeapFreeRatio used |
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1016 // to resize the Java heap by some GC's. New flags can be implemented |
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1017 // if really needed. MinHeapFreeRatio is used to calculate how much |
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1018 // free space is desirable in the metaspace capacity to decide how much |
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1019 // to increase the HWM. MaxHeapFreeRatio is used to decide how much |
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1020 // free space is desirable in the metaspace capacity before decreasing |
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1021 // the HWM. |
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1022 |
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1023 // Calculate the amount to increase the high water mark (HWM). |
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1024 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1025 // another expansion is not requested too soon. If that is not |
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1026 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1027 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1028 // not enough, expand by the size of the allocation (word_size) plus |
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1029 // some. |
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1030 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1031 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1032 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1033 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1034 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1035 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1036 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1037 if (delta_words > min_delta_words) { |
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1038 // Don't want to hit the high water mark on the next |
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1039 // allocation so make the delta greater than just enough |
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1040 // for this allocation. |
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1041 delta_words = MAX2(delta_words, max_delta_words); |
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1042 if (delta_words > max_delta_words) { |
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1043 // This allocation is large but the next ones are probably not |
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1044 // so increase by the minimum. |
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1045 delta_words = delta_words + min_delta_words; |
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1046 } |
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1047 } |
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1048 return delta_words; |
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1049 } |
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1050 |
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1051 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
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1052 |
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1053 // Class virtual space should always be expanded. Call GC for the other |
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1054 // metadata virtual space. |
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1055 if (vsl == Metaspace::class_space_list()) return true; |
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1056 |
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1057 // If the user wants a limit, impose one. |
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1058 size_t max_metaspace_size_words = MaxMetaspaceSize / BytesPerWord; |
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1059 size_t metaspace_size_words = MetaspaceSize / BytesPerWord; |
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1060 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize) && |
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1061 vsl->capacity_words_sum() >= max_metaspace_size_words) { |
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1062 return false; |
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1063 } |
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1064 |
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1065 // If this is part of an allocation after a GC, expand |
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1066 // unconditionally. |
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1067 if(MetaspaceGC::expand_after_GC()) { |
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1068 return true; |
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1069 } |
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1070 |
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1071 // If the capacity is below the minimum capacity, allow the |
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1072 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1073 // to that minimum capacity so that a GC will not be induced |
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1074 // until that minimum capacity is exceeded. |
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1075 if (vsl->capacity_words_sum() < metaspace_size_words || |
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1076 capacity_until_GC() == 0) { |
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1077 set_capacity_until_GC(metaspace_size_words); |
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1078 return true; |
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1079 } else { |
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1080 if (vsl->capacity_words_sum() < capacity_until_GC()) { |
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1081 return true; |
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1082 } else { |
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1083 if (TraceMetadataChunkAllocation && Verbose) { |
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1084 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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1085 " capacity_until_GC " SIZE_FORMAT |
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1086 " capacity_words_sum " SIZE_FORMAT |
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1087 " used_words_sum " SIZE_FORMAT |
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1088 " free chunks " SIZE_FORMAT |
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1089 " free chunks count %d", |
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1090 word_size, |
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1091 capacity_until_GC(), |
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1092 vsl->capacity_words_sum(), |
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1093 vsl->used_words_sum(), |
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1094 vsl->chunk_manager()->free_chunks_total(), |
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1095 vsl->chunk_manager()->free_chunks_count()); |
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1096 } |
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1097 return false; |
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1098 } |
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1099 } |
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1100 } |
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1101 |
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1102 // Variables are in bytes |
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1103 |
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1104 void MetaspaceGC::compute_new_size() { |
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1105 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1106 uint current_shrink_factor = _shrink_factor; |
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1107 _shrink_factor = 0; |
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1108 |
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1109 VirtualSpaceList *vsl = Metaspace::space_list(); |
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1110 |
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1111 size_t capacity_after_gc = vsl->capacity_bytes_sum(); |
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1112 // Check to see if these two can be calculated without walking the CLDG |
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1113 size_t used_after_gc = vsl->used_bytes_sum(); |
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1114 size_t capacity_until_GC = vsl->capacity_bytes_sum(); |
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1115 size_t free_after_gc = capacity_until_GC - used_after_gc; |
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1116 |
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1117 const double minimum_free_percentage = MinHeapFreeRatio / 100.0; |
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1118 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1119 |
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1120 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1121 size_t minimum_desired_capacity = |
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1122 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1123 // Don't shrink less than the initial generation size |
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1124 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1125 MetaspaceSize); |
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1126 |
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1127 if (PrintGCDetails && Verbose) { |
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1128 const double free_percentage = ((double)free_after_gc) / capacity_until_GC; |
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1129 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1130 gclog_or_tty->print_cr(" " |
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1131 " minimum_free_percentage: %6.2f" |
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1132 " maximum_used_percentage: %6.2f", |
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1133 minimum_free_percentage, |
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1134 maximum_used_percentage); |
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1135 double d_free_after_gc = free_after_gc / (double) K; |
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1136 gclog_or_tty->print_cr(" " |
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1137 " free_after_gc : %6.1fK" |
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1138 " used_after_gc : %6.1fK" |
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1139 " capacity_after_gc : %6.1fK" |
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1140 " metaspace HWM : %6.1fK", |
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1141 free_after_gc / (double) K, |
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1142 used_after_gc / (double) K, |
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1143 capacity_after_gc / (double) K, |
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1144 capacity_until_GC / (double) K); |
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1145 gclog_or_tty->print_cr(" " |
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1146 " free_percentage: %6.2f", |
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1147 free_percentage); |
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1148 } |
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1149 |
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1150 |
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1151 if (capacity_until_GC < minimum_desired_capacity) { |
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1152 // If we have less capacity below the metaspace HWM, then |
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1153 // increment the HWM. |
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1154 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1155 // Don't expand unless it's significant |
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1156 if (expand_bytes >= MinMetaspaceExpansion) { |
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1157 size_t expand_words = expand_bytes / BytesPerWord; |
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1158 MetaspaceGC::inc_capacity_until_GC(expand_words); |
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1159 } |
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1160 if (PrintGCDetails && Verbose) { |
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1161 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
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1162 gclog_or_tty->print_cr(" expanding:" |
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1163 " minimum_desired_capacity: %6.1fK" |
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1164 " expand_words: %6.1fK" |
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1165 " MinMetaspaceExpansion: %6.1fK" |
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1166 " new metaspace HWM: %6.1fK", |
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1167 minimum_desired_capacity / (double) K, |
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1168 expand_bytes / (double) K, |
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1169 MinMetaspaceExpansion / (double) K, |
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1170 new_capacity_until_GC / (double) K); |
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1171 } |
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1172 return; |
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1173 } |
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1174 |
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1175 // No expansion, now see if we want to shrink |
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1176 size_t shrink_words = 0; |
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1177 // We would never want to shrink more than this |
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1178 size_t max_shrink_words = capacity_until_GC - minimum_desired_capacity; |
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1179 assert(max_shrink_words >= 0, err_msg("max_shrink_words " SIZE_FORMAT, |
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1180 max_shrink_words)); |
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1181 |
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1182 // Should shrinking be considered? |
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1183 if (MaxHeapFreeRatio < 100) { |
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1184 const double maximum_free_percentage = MaxHeapFreeRatio / 100.0; |
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1185 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1186 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1187 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1188 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1189 MetaspaceSize); |
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1190 if (PrintGC && Verbose) { |
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1191 gclog_or_tty->print_cr(" " |
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1192 " maximum_free_percentage: %6.2f" |
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1193 " minimum_used_percentage: %6.2f", |
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1194 maximum_free_percentage, |
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1195 minimum_used_percentage); |
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1196 gclog_or_tty->print_cr(" " |
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1197 " capacity_until_GC: %6.1fK" |
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1198 " minimum_desired_capacity: %6.1fK" |
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1199 " maximum_desired_capacity: %6.1fK", |
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1200 capacity_until_GC / (double) K, |
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1201 minimum_desired_capacity / (double) K, |
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1202 maximum_desired_capacity / (double) K); |
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1203 } |
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1204 |
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1205 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1206 "sanity check"); |
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1207 |
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1208 if (capacity_until_GC > maximum_desired_capacity) { |
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1209 // Capacity too large, compute shrinking size |
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1210 shrink_words = capacity_until_GC - maximum_desired_capacity; |
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1211 // We don't want shrink all the way back to initSize if people call |
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1212 // System.gc(), because some programs do that between "phases" and then |
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1213 // we'd just have to grow the heap up again for the next phase. So we |
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1214 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1215 // on the third call, and 100% by the fourth call. But if we recompute |
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1216 // size without shrinking, it goes back to 0%. |
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1217 shrink_words = shrink_words / 100 * current_shrink_factor; |
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1218 assert(shrink_words <= max_shrink_words, |
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1219 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1220 shrink_words, max_shrink_words)); |
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1221 if (current_shrink_factor == 0) { |
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1222 _shrink_factor = 10; |
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1223 } else { |
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1224 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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1225 } |
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1226 if (PrintGCDetails && Verbose) { |
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1227 gclog_or_tty->print_cr(" " |
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1228 " shrinking:" |
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1229 " initSize: %.1fK" |
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1230 " maximum_desired_capacity: %.1fK", |
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1231 MetaspaceSize / (double) K, |
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1232 maximum_desired_capacity / (double) K); |
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1233 gclog_or_tty->print_cr(" " |
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1234 " shrink_words: %.1fK" |
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1235 " current_shrink_factor: %d" |
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1236 " new shrink factor: %d" |
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1237 " MinMetaspaceExpansion: %.1fK", |
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1238 shrink_words / (double) K, |
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1239 current_shrink_factor, |
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1240 _shrink_factor, |
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1241 MinMetaspaceExpansion / (double) K); |
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1242 } |
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1243 } |
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1244 } |
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1245 |
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|
1246 |
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coleenp
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1247 // Don't shrink unless it's significant |
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|
1248 if (shrink_words >= MinMetaspaceExpansion) { |
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1249 VirtualSpaceNode* csp = vsl->current_virtual_space(); |
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1250 size_t available_to_shrink = csp->capacity_words_in_vs() - |
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|
1251 csp->used_words_in_vs(); |
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|
1252 shrink_words = MIN2(shrink_words, available_to_shrink); |
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1253 csp->shrink_by(shrink_words); |
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|
1254 MetaspaceGC::dec_capacity_until_GC(shrink_words); |
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|
1255 if (PrintGCDetails && Verbose) { |
da91efe96a93
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1256 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
da91efe96a93
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|
1257 gclog_or_tty->print_cr(" metaspace HWM: %.1fK", new_capacity_until_GC / (double) K); |
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parents:
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|
1258 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1259 } |
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1260 assert(vsl->used_bytes_sum() == used_after_gc && |
da91efe96a93
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1261 used_after_gc <= vsl->capacity_bytes_sum(), |
da91efe96a93
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|
1262 "sanity check"); |
da91efe96a93
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parents:
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|
1263 |
da91efe96a93
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parents:
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|
1264 } |
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|
1265 |
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|
1266 // Metadebug methods |
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|
1267 |
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1268 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
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1269 size_t chunk_word_size){ |
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|
1270 #ifdef ASSERT |
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1271 VirtualSpaceList* vsl = sm->vs_list(); |
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1272 if (MetaDataDeallocateALot && |
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1273 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
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1274 Metadebug::reset_deallocate_chunk_a_lot_count(); |
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1275 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
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1276 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
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1277 if (dummy_chunk == NULL) { |
da91efe96a93
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1278 break; |
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coleenp
parents:
diff
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|
1279 } |
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1280 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
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1281 |
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1282 if (TraceMetadataChunkAllocation && Verbose) { |
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1283 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
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1284 sm->sum_count_in_chunks_in_use()); |
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1285 dummy_chunk->print_on(gclog_or_tty); |
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1286 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
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|
1287 vsl->chunk_manager()->free_chunks_total(), |
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1288 vsl->chunk_manager()->free_chunks_count()); |
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1289 } |
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|
1290 } |
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|
1291 } else { |
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|
1292 Metadebug::inc_deallocate_chunk_a_lot_count(); |
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|
1293 } |
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|
1294 #endif |
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diff
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|
1295 } |
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|
1296 |
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1297 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
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1298 size_t raw_word_size){ |
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|
1299 #ifdef ASSERT |
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|
1300 if (MetaDataDeallocateALot && |
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1301 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
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1302 Metadebug::set_deallocate_block_a_lot_count(0); |
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1303 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1304 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
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|
1305 if (dummy_block == 0) { |
da91efe96a93
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coleenp
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|
1306 break; |
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diff
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|
1307 } |
6885 | 1308 sm->deallocate(dummy_block, raw_word_size); |
6725
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|
1309 } |
da91efe96a93
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|
1310 } else { |
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|
1311 Metadebug::inc_deallocate_block_a_lot_count(); |
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|
1312 } |
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|
1313 #endif |
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|
1314 } |
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|
1315 |
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1316 void Metadebug::init_allocation_fail_alot_count() { |
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1317 if (MetadataAllocationFailALot) { |
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|
1318 _allocation_fail_alot_count = |
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|
1319 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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|
1320 } |
da91efe96a93
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|
1321 } |
da91efe96a93
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|
1322 |
da91efe96a93
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|
1323 #ifdef ASSERT |
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|
1324 bool Metadebug::test_metadata_failure() { |
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|
1325 if (MetadataAllocationFailALot && |
da91efe96a93
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|
1326 Threads::is_vm_complete()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1327 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1328 _allocation_fail_alot_count--; |
da91efe96a93
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|
1329 } else { |
da91efe96a93
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|
1330 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1331 gclog_or_tty->print_cr("Metadata allocation failing for " |
da91efe96a93
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|
1332 "MetadataAllocationFailALot"); |
da91efe96a93
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diff
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|
1333 } |
da91efe96a93
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|
1334 init_allocation_fail_alot_count(); |
da91efe96a93
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|
1335 return true; |
da91efe96a93
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|
1336 } |
da91efe96a93
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|
1337 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1338 return false; |
da91efe96a93
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|
1339 } |
da91efe96a93
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|
1340 #endif |
da91efe96a93
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|
1341 |
da91efe96a93
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|
1342 // ChunkList methods |
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|
1343 |
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|
1344 size_t ChunkList::sum_list_size() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1345 size_t result = 0; |
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|
1346 Metachunk* cur = head(); |
da91efe96a93
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coleenp
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|
1347 while (cur != NULL) { |
da91efe96a93
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|
1348 result += cur->word_size(); |
da91efe96a93
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|
1349 cur = cur->next(); |
da91efe96a93
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|
1350 } |
da91efe96a93
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|
1351 return result; |
da91efe96a93
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|
1352 } |
da91efe96a93
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|
1353 |
da91efe96a93
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|
1354 size_t ChunkList::sum_list_count() { |
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6964458: Reimplement class meta-data storage to use native memory
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|
1355 size_t result = 0; |
da91efe96a93
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|
1356 Metachunk* cur = head(); |
da91efe96a93
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coleenp
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|
1357 while (cur != NULL) { |
da91efe96a93
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coleenp
parents:
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|
1358 result++; |
da91efe96a93
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|
1359 cur = cur->next(); |
da91efe96a93
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|
1360 } |
da91efe96a93
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|
1361 return result; |
da91efe96a93
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coleenp
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diff
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|
1362 } |
da91efe96a93
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|
1363 |
da91efe96a93
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|
1364 size_t ChunkList::sum_list_capacity() { |
da91efe96a93
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|
1365 size_t result = 0; |
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|
1366 Metachunk* cur = head(); |
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|
1367 while (cur != NULL) { |
da91efe96a93
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|
1368 result += cur->capacity_word_size(); |
da91efe96a93
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|
1369 cur = cur->next(); |
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|
1370 } |
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|
1371 return result; |
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parents:
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|
1372 } |
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|
1373 |
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changeset
|
1374 void ChunkList::add_at_head(Metachunk* head, Metachunk* tail) { |
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|
1375 assert_lock_strong(SpaceManager::expand_lock()); |
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|
1376 assert(tail->next() == NULL, "Not the tail"); |
da91efe96a93
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|
1377 |
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|
1378 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1379 tty->print("ChunkList::add_at_head: "); |
da91efe96a93
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|
1380 Metachunk* cur = head; |
da91efe96a93
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1381 while (cur != NULL) { |
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1382 tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", cur, cur->word_size()); |
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1383 cur = cur->next(); |
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1384 } |
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1385 tty->print_cr(""); |
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1386 } |
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1387 |
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1388 if (tail != NULL) { |
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1389 tail->set_next(_head); |
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1390 } |
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1391 set_head(head); |
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1392 } |
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1393 |
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1394 void ChunkList::add_at_head(Metachunk* list) { |
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1395 if (list == NULL) { |
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1396 // Nothing to add |
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1397 return; |
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1398 } |
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1399 assert_lock_strong(SpaceManager::expand_lock()); |
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1400 Metachunk* head = list; |
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1401 Metachunk* tail = list; |
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1402 Metachunk* cur = head->next(); |
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1403 // Search for the tail since it is not passed. |
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1404 while (cur != NULL) { |
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1405 tail = cur; |
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1406 cur = cur->next(); |
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1407 } |
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1408 add_at_head(head, tail); |
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1409 } |
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1410 |
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1411 // ChunkManager methods |
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1412 |
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1413 // Verification of _free_chunks_total and _free_chunks_count does not |
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1414 // work with the CMS collector because its use of additional locks |
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1415 // complicate the mutex deadlock detection but it can still be useful |
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1416 // for detecting errors in the chunk accounting with other collectors. |
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1417 |
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1418 size_t ChunkManager::free_chunks_total() { |
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1419 #ifdef ASSERT |
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1420 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1421 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1422 Mutex::_no_safepoint_check_flag); |
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1423 slow_locked_verify_free_chunks_total(); |
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1424 } |
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1425 #endif |
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1426 return _free_chunks_total; |
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1427 } |
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1428 |
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1429 size_t ChunkManager::free_chunks_total_in_bytes() { |
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1430 return free_chunks_total() * BytesPerWord; |
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1431 } |
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1432 |
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1433 size_t ChunkManager::free_chunks_count() { |
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1434 #ifdef ASSERT |
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1435 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1436 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1437 Mutex::_no_safepoint_check_flag); |
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1438 // This lock is only needed in debug because the verification |
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1439 // of the _free_chunks_totals walks the list of free chunks |
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1440 slow_locked_verify_free_chunks_count(); |
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1441 } |
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1442 #endif |
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1443 return _free_chunks_count; |
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1444 } |
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1445 |
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1446 void ChunkManager::locked_verify_free_chunks_total() { |
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1447 assert_lock_strong(SpaceManager::expand_lock()); |
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1448 assert(sum_free_chunks() == _free_chunks_total, |
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1449 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
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1450 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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1451 sum_free_chunks())); |
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1452 } |
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1453 |
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1454 void ChunkManager::verify_free_chunks_total() { |
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1455 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1456 Mutex::_no_safepoint_check_flag); |
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1457 locked_verify_free_chunks_total(); |
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1458 } |
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1459 |
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1460 void ChunkManager::locked_verify_free_chunks_count() { |
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1461 assert_lock_strong(SpaceManager::expand_lock()); |
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1462 assert(sum_free_chunks_count() == _free_chunks_count, |
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1463 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1464 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1465 sum_free_chunks_count())); |
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1466 } |
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1467 |
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1468 void ChunkManager::verify_free_chunks_count() { |
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1469 #ifdef ASSERT |
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1470 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1471 Mutex::_no_safepoint_check_flag); |
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1472 locked_verify_free_chunks_count(); |
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1473 #endif |
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1474 } |
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1475 |
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1476 void ChunkManager::verify() { |
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1477 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1478 Mutex::_no_safepoint_check_flag); |
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1479 locked_verify(); |
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1480 } |
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1481 |
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1482 void ChunkManager::locked_verify() { |
6885 | 1483 locked_verify_free_chunks_count(); |
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1484 locked_verify_free_chunks_total(); |
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1485 } |
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1486 |
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1487 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1488 assert_lock_strong(SpaceManager::expand_lock()); |
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1489 st->print_cr("Free chunk total 0x%x count 0x%x", |
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1490 _free_chunks_total, _free_chunks_count); |
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1491 } |
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1492 |
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1493 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1494 assert_lock_strong(SpaceManager::expand_lock()); |
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1495 st->print_cr("Sum free chunk total 0x%x count 0x%x", |
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1496 sum_free_chunks(), sum_free_chunks_count()); |
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1497 } |
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1498 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1499 return &_free_chunks[index]; |
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1500 } |
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1501 |
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1502 // These methods that sum the free chunk lists are used in printing |
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1503 // methods that are used in product builds. |
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1504 size_t ChunkManager::sum_free_chunks() { |
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1505 assert_lock_strong(SpaceManager::expand_lock()); |
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1506 size_t result = 0; |
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1507 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1508 ChunkList* list = free_chunks(i); |
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1509 |
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1510 if (list == NULL) { |
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1511 continue; |
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1512 } |
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1513 |
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1514 result = result + list->sum_list_capacity(); |
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1515 } |
6885 | 1516 result = result + humongous_dictionary()->total_size(); |
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1517 return result; |
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1518 } |
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1519 |
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1520 size_t ChunkManager::sum_free_chunks_count() { |
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1521 assert_lock_strong(SpaceManager::expand_lock()); |
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1522 size_t count = 0; |
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1523 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1524 ChunkList* list = free_chunks(i); |
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1525 if (list == NULL) { |
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1526 continue; |
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1527 } |
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1528 count = count + list->sum_list_count(); |
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1529 } |
6885 | 1530 count = count + humongous_dictionary()->total_free_blocks(); |
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1531 return count; |
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1532 } |
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1533 |
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1534 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1535 switch (word_size) { |
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1536 case SpaceManager::SmallChunk : |
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1537 return &_free_chunks[0]; |
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1538 case SpaceManager::MediumChunk : |
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1539 return &_free_chunks[1]; |
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1540 default: |
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1541 assert(word_size > SpaceManager::MediumChunk, "List inconsistency"); |
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1542 return &_free_chunks[2]; |
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1543 } |
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1544 } |
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1545 |
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1546 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1547 assert_lock_strong(SpaceManager::expand_lock()); |
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1548 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1549 chunk->set_next(free_list->head()); |
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1550 free_list->set_head(chunk); |
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1551 // chunk is being returned to the chunk free list |
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1552 inc_free_chunks_total(chunk->capacity_word_size()); |
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1553 slow_locked_verify(); |
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1554 } |
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1555 |
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1556 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1557 // The deallocation of a chunk originates in the freelist |
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1558 // manangement code for a Metaspace and does not hold the |
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1559 // lock. |
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1560 assert(chunk != NULL, "Deallocating NULL"); |
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1561 assert_lock_strong(SpaceManager::expand_lock()); |
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1562 slow_locked_verify(); |
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1563 if (TraceMetadataChunkAllocation) { |
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1564 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1565 PTR_FORMAT " size " SIZE_FORMAT, |
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1566 chunk, chunk->word_size()); |
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1567 } |
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1568 free_chunks_put(chunk); |
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1569 } |
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1570 |
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1571 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1572 assert_lock_strong(SpaceManager::expand_lock()); |
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1573 |
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1574 slow_locked_verify(); |
6885 | 1575 |
1576 Metachunk* chunk = NULL; | |
1577 if (!SpaceManager::is_humongous(word_size)) { | |
1578 ChunkList* free_list = find_free_chunks_list(word_size); | |
1579 assert(free_list != NULL, "Sanity check"); | |
1580 | |
1581 chunk = free_list->head(); | |
1582 debug_only(Metachunk* debug_head = chunk;) | |
1583 | |
1584 if (chunk == NULL) { | |
1585 return NULL; | |
1586 } | |
1587 | |
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1588 // Remove the chunk as the head of the list. |
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1589 free_list->set_head(chunk->next()); |
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1590 chunk->set_next(NULL); |
6885 | 1591 // Chunk has been removed from the chunks free list. |
1592 dec_free_chunks_total(chunk->capacity_word_size()); | |
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1593 |
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1594 if (TraceMetadataChunkAllocation && Verbose) { |
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1595 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1596 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1597 free_list, chunk, chunk->word_size()); |
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1598 } |
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1599 } else { |
6885 | 1600 chunk = humongous_dictionary()->get_chunk( |
1601 word_size, | |
1602 FreeBlockDictionary<Metachunk>::atLeast); | |
1603 | |
1604 if (chunk != NULL) { | |
1605 if (TraceMetadataHumongousAllocation) { | |
1606 size_t waste = chunk->word_size() - word_size; | |
1607 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT | |
1608 " for requested size " SIZE_FORMAT | |
1609 " waste " SIZE_FORMAT, | |
1610 chunk->word_size(), word_size, waste); | |
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1611 } |
6885 | 1612 // Chunk is being removed from the chunks free list. |
1613 dec_free_chunks_total(chunk->capacity_word_size()); | |
1614 #ifdef ASSERT | |
1615 chunk->set_is_free(false); | |
1616 #endif | |
1617 } | |
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1618 } |
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1619 slow_locked_verify(); |
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1620 return chunk; |
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1621 } |
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1622 |
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1623 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1624 assert_lock_strong(SpaceManager::expand_lock()); |
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1625 slow_locked_verify(); |
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1626 |
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1627 // Take from the beginning of the list |
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1628 Metachunk* chunk = free_chunks_get(word_size); |
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1629 if (chunk == NULL) { |
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1630 return NULL; |
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|
1631 } |
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1632 |
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1633 assert(word_size <= chunk->word_size() || |
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1634 SpaceManager::is_humongous(chunk->word_size()), |
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1635 "Non-humongous variable sized chunk"); |
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1636 if (TraceMetadataChunkAllocation) { |
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1637 tty->print("ChunkManager::chunk_freelist_allocate: chunk " |
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1638 PTR_FORMAT " size " SIZE_FORMAT " ", |
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1639 chunk, chunk->word_size()); |
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1640 locked_print_free_chunks(tty); |
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1641 } |
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1642 |
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1643 return chunk; |
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|
1644 } |
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1645 |
6885 | 1646 void ChunkManager::print_on(outputStream* out) { |
1647 if (PrintFLSStatistics != 0) { | |
1648 humongous_dictionary()->report_statistics(); | |
1649 } | |
1650 } | |
1651 | |
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1652 // SpaceManager methods |
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1653 |
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1654 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1655 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1656 size_t free = 0; |
6885 | 1657 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1658 Metachunk* chunk = chunks_in_use(i); |
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1659 while (chunk != NULL) { |
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1660 free += chunk->free_word_size(); |
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1661 chunk = chunk->next(); |
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1662 } |
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1663 } |
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1664 return free; |
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1665 } |
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1666 |
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1667 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1668 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1669 size_t result = 0; |
6885 | 1670 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
1671 | |
1672 | |
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1673 result += sum_waste_in_chunks_in_use(i); |
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1674 } |
6885 | 1675 |
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1676 return result; |
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1677 } |
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1678 |
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1679 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1680 size_t result = 0; |
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1681 size_t count = 0; |
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1682 Metachunk* chunk = chunks_in_use(index); |
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1683 // Count the free space in all the chunk but not the |
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1684 // current chunk from which allocations are still being done. |
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|
1685 if (chunk != NULL) { |
6885 | 1686 Metachunk* prev = chunk; |
1687 while (chunk != NULL && chunk != current_chunk()) { | |
1688 result += chunk->free_word_size(); | |
1689 prev = chunk; | |
6725
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1690 chunk = chunk->next(); |
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1691 count++; |
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|
1692 } |
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|
1693 } |
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1694 return result; |
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|
1695 } |
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|
1696 |
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1697 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1698 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1699 size_t sum = 0; |
6885 | 1700 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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1701 Metachunk* chunk = chunks_in_use(i); |
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1702 while (chunk != NULL) { |
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1703 // Just changed this sum += chunk->capacity_word_size(); |
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1704 // sum += chunk->word_size() - Metachunk::overhead(); |
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1705 sum += chunk->capacity_word_size(); |
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1706 chunk = chunk->next(); |
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1707 } |
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|
1708 } |
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1709 return sum; |
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|
1710 } |
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1711 |
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1712 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1713 size_t count = 0; |
6885 | 1714 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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1715 count = count + sum_count_in_chunks_in_use(i); |
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1716 } |
6885 | 1717 |
6725
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1718 return count; |
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|
1719 } |
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1720 |
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1721 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1722 size_t count = 0; |
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1723 Metachunk* chunk = chunks_in_use(i); |
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1724 while (chunk != NULL) { |
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1725 count++; |
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1726 chunk = chunk->next(); |
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1727 } |
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1728 return count; |
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|
1729 } |
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1730 |
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1731 |
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1732 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1733 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1734 size_t used = 0; |
6885 | 1735 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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1736 Metachunk* chunk = chunks_in_use(i); |
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1737 while (chunk != NULL) { |
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1738 used += chunk->used_word_size(); |
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1739 chunk = chunk->next(); |
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1740 } |
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1741 } |
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1742 return used; |
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1743 } |
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1744 |
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1745 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1746 |
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1747 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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1748 st->print_cr("SpaceManager: small chunk " PTR_FORMAT |
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1749 " free " SIZE_FORMAT, |
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1750 small_chunk, |
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1751 small_chunk->free_word_size()); |
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1752 |
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1753 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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1754 st->print("medium chunk " PTR_FORMAT, medium_chunk); |
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1755 Metachunk* tail = current_chunk(); |
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1756 st->print_cr(" current chunk " PTR_FORMAT, tail); |
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1757 |
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1758 Metachunk* head = chunks_in_use(HumongousIndex); |
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1759 st->print_cr("humongous chunk " PTR_FORMAT, head); |
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1760 |
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1761 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
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1762 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
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1763 } |
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1764 |
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1765 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1766 |
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1767 // Decide between a small chunk and a medium chunk. Up to |
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1768 // _small_chunk_limit small chunks can be allocated but |
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1769 // once a medium chunk has been allocated, no more small |
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1770 // chunks will be allocated. |
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1771 size_t chunk_word_size; |
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1772 if (chunks_in_use(MediumIndex) == NULL && |
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1773 (!has_small_chunk_limit() || |
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1774 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit)) { |
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1775 chunk_word_size = (size_t) SpaceManager::SmallChunk; |
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1776 if (word_size + Metachunk::overhead() > SpaceManager::SmallChunk) { |
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1777 chunk_word_size = MediumChunk; |
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1778 } |
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1779 } else { |
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1780 chunk_word_size = MediumChunk; |
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1781 } |
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1782 |
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1783 // Might still need a humongous chunk |
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1784 chunk_word_size = |
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1785 MAX2((size_t) chunk_word_size, word_size + Metachunk::overhead()); |
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1786 |
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1787 if (TraceMetadataHumongousAllocation && |
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1788 SpaceManager::is_humongous(word_size)) { |
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1789 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1790 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1791 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1792 chunk_word_size); |
6885 | 1793 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
6725
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1794 Metachunk::overhead()); |
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1795 } |
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1796 return chunk_word_size; |
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1797 } |
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1798 |
6885 | 1799 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1800 assert(vs_list()->current_virtual_space() != NULL, |
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1801 "Should have been set"); |
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1802 assert(current_chunk() == NULL || |
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1803 current_chunk()->allocate(word_size) == NULL, |
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1804 "Don't need to expand"); |
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1805 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1806 |
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1807 if (TraceMetadataChunkAllocation && Verbose) { |
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1808 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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1809 " words " SIZE_FORMAT " space left", |
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1810 word_size, current_chunk() != NULL ? |
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1811 current_chunk()->free_word_size() : 0); |
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1812 } |
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1813 |
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1814 // Get another chunk out of the virtual space |
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1815 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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1816 Metachunk* next = vs_list()->get_new_chunk(word_size, grow_chunks_by_words); |
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1817 |
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1818 // If a chunk was available, add it to the in-use chunk list |
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1819 // and do an allocation from it. |
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1820 if (next != NULL) { |
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1821 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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1822 // Add to this manager's list of chunks in use. |
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1823 add_chunk(next, false); |
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1824 return next->allocate(word_size); |
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1825 } |
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1826 return NULL; |
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1827 } |
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1828 |
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1829 void SpaceManager::print_on(outputStream* st) const { |
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1830 |
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1831 for (ChunkIndex i = SmallIndex; |
6885 | 1832 i < NumberOfInUseLists ; |
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1833 i = next_chunk_index(i) ) { |
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1834 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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1835 chunks_in_use(i), |
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1836 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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1837 } |
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1838 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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1839 " Humongous " SIZE_FORMAT, |
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1840 sum_waste_in_chunks_in_use(SmallIndex), |
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1841 sum_waste_in_chunks_in_use(MediumIndex), |
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1842 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 1843 // block free lists |
1844 if (block_freelists() != NULL) { | |
1845 st->print_cr("total in block free lists " SIZE_FORMAT, | |
1846 block_freelists()->total_size()); | |
1847 } | |
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1848 } |
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1849 |
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1850 SpaceManager::SpaceManager(Mutex* lock, VirtualSpaceList* vs_list) : |
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1851 _vs_list(vs_list), |
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1852 _allocation_total(0), |
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1853 _lock(lock) { |
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1854 Metadebug::init_allocation_fail_alot_count(); |
6885 | 1855 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1856 _chunks_in_use[i] = NULL; |
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1857 } |
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1858 _current_chunk = NULL; |
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1859 if (TraceMetadataChunkAllocation && Verbose) { |
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1860 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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1861 } |
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1862 } |
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1863 |
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1864 SpaceManager::~SpaceManager() { |
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1865 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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1866 Mutex::_no_safepoint_check_flag); |
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1867 |
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1868 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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1869 |
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1870 chunk_manager->slow_locked_verify(); |
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1871 |
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1872 if (TraceMetadataChunkAllocation && Verbose) { |
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1873 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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1874 locked_print_chunks_in_use_on(gclog_or_tty); |
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1875 } |
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1876 |
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1877 // Mangle freed memory. |
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1878 NOT_PRODUCT(mangle_freed_chunks();) |
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1879 |
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1880 // Have to update before the chunks_in_use lists are emptied |
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1881 // below. |
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1882 chunk_manager->inc_free_chunks_total(sum_capacity_in_chunks_in_use(), |
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1883 sum_count_in_chunks_in_use()); |
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1884 |
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1885 // Add all the chunks in use by this space manager |
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1886 // to the global list of free chunks. |
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1887 |
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1888 // Small chunks. There is one _current_chunk for each |
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1889 // Metaspace. It could point to a small or medium chunk. |
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1890 // Rather than determine which it is, follow the list of |
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1891 // small chunks to add them to the free list |
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1892 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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1893 chunk_manager->free_small_chunks()->add_at_head(small_chunk); |
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1894 set_chunks_in_use(SmallIndex, NULL); |
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1895 |
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1896 // After the small chunk are the medium chunks |
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1897 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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1898 assert(medium_chunk == NULL || |
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1899 medium_chunk->word_size() == MediumChunk, |
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1900 "Chunk is on the wrong list"); |
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1901 |
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1902 if (medium_chunk != NULL) { |
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1903 Metachunk* head = medium_chunk; |
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1904 // If there is a medium chunk then the _current_chunk can only |
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1905 // point to the last medium chunk. |
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1906 Metachunk* tail = current_chunk(); |
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1907 chunk_manager->free_medium_chunks()->add_at_head(head, tail); |
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1908 set_chunks_in_use(MediumIndex, NULL); |
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1909 } |
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1910 |
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1911 // Humongous chunks |
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1912 // Humongous chunks are never the current chunk. |
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1913 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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1914 |
6885 | 1915 while (humongous_chunks != NULL) { |
1916 #ifdef ASSERT | |
1917 humongous_chunks->set_is_free(true); | |
1918 #endif | |
1919 Metachunk* next_humongous_chunks = humongous_chunks->next(); | |
1920 chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); | |
1921 humongous_chunks = next_humongous_chunks; | |
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1922 } |
6885 | 1923 set_chunks_in_use(HumongousIndex, NULL); |
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1924 chunk_manager->slow_locked_verify(); |
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1925 } |
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1926 |
6885 | 1927 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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1928 assert_lock_strong(_lock); |
6885 | 1929 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
1930 assert(word_size >= min_size, | |
1931 err_msg("Should not deallocate dark matter " SIZE_FORMAT, word_size)); | |
1932 block_freelists()->return_block(p, word_size); | |
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1933 } |
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1934 |
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1935 // Adds a chunk to the list of chunks in use. |
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1936 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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1937 |
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1938 assert(new_chunk != NULL, "Should not be NULL"); |
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1939 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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1940 |
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1941 new_chunk->reset_empty(); |
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1942 |
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1943 // Find the correct list and and set the current |
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1944 // chunk for that list. |
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1945 switch (new_chunk->word_size()) { |
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1946 case SpaceManager::SmallChunk : |
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1947 if (chunks_in_use(SmallIndex) == NULL) { |
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1948 // First chunk to add to the list |
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1949 set_chunks_in_use(SmallIndex, new_chunk); |
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1950 } else { |
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1951 assert(current_chunk()->word_size() == SpaceManager::SmallChunk, |
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1952 err_msg( "Incorrect mix of sizes in chunk list " |
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1953 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
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1954 current_chunk()->word_size(), new_chunk->word_size())); |
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1955 current_chunk()->set_next(new_chunk); |
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1956 } |
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1957 // Make current chunk |
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1958 set_current_chunk(new_chunk); |
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1959 break; |
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1960 case SpaceManager::MediumChunk : |
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1961 if (chunks_in_use(MediumIndex) == NULL) { |
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1962 // About to add the first medium chunk so teminate the |
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1963 // small chunk list. In general once medium chunks are |
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1964 // being added, we're past the need for small chunks. |
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1965 if (current_chunk() != NULL) { |
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1966 // Only a small chunk or the initial chunk could be |
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1967 // the current chunk if this is the first medium chunk. |
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1968 assert(current_chunk()->word_size() == SpaceManager::SmallChunk || |
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1969 chunks_in_use(SmallIndex) == NULL, |
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1970 err_msg("Should be a small chunk or initial chunk, current chunk " |
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1971 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
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1972 current_chunk()->word_size(), new_chunk->word_size())); |
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1973 current_chunk()->set_next(NULL); |
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1974 } |
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1975 // First chunk to add to the list |
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1976 set_chunks_in_use(MediumIndex, new_chunk); |
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1977 |
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1978 } else { |
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1979 // As a minimum the first medium chunk added would |
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1980 // have become the _current_chunk |
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1981 // so the _current_chunk has to be non-NULL here |
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1982 // (although not necessarily still the first medium chunk). |
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1983 assert(current_chunk()->word_size() == SpaceManager::MediumChunk, |
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1984 "A medium chunk should the current chunk"); |
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1985 current_chunk()->set_next(new_chunk); |
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1986 } |
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1987 // Make current chunk |
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1988 set_current_chunk(new_chunk); |
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1989 break; |
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1990 default: { |
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1991 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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1992 // small, so small will be null. Link this first chunk as the current |
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1993 // chunk. |
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1994 if (make_current) { |
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1995 // Set as the current chunk but otherwise treat as a humongous chunk. |
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1996 set_current_chunk(new_chunk); |
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1997 } |
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1998 // Link at head. The _current_chunk only points to a humongous chunk for |
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1999 // the null class loader metaspace (class and data virtual space managers) |
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2000 // any humongous chunks so will not point to the tail |
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2001 // of the humongous chunks list. |
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2002 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2003 set_chunks_in_use(HumongousIndex, new_chunk); |
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2004 |
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2005 assert(new_chunk->word_size() > MediumChunk, "List inconsistency"); |
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2006 } |
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2007 } |
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2008 |
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2009 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2010 if (TraceMetadataChunkAllocation && Verbose) { |
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2011 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2012 sum_count_in_chunks_in_use()); |
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2013 new_chunk->print_on(gclog_or_tty); |
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2014 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
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2015 } |
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2016 } |
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2017 |
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2018 MetaWord* SpaceManager::allocate(size_t word_size) { |
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2019 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2020 |
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2021 // If only the dictionary is going to be used (i.e., no |
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2022 // indexed free list), then there is a minimum size requirement. |
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2023 // MinChunkSize is a placeholder for the real minimum size JJJ |
6885 | 2024 size_t byte_size = word_size * BytesPerWord; |
2025 | |
2026 size_t byte_size_with_overhead = byte_size + Metablock::overhead(); | |
2027 | |
2028 size_t raw_bytes_size = MAX2(byte_size_with_overhead, | |
2029 Metablock::min_block_byte_size()); | |
2030 raw_bytes_size = ARENA_ALIGN(raw_bytes_size); | |
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2031 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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2032 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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2033 |
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2034 BlockFreelist* fl = block_freelists(); |
6885 | 2035 MetaWord* p = NULL; |
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2036 // Allocation from the dictionary is expensive in the sense that |
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2037 // the dictionary has to be searched for a size. Don't allocate |
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2038 // from the dictionary until it starts to get fat. Is this |
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2039 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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2040 // for allocations. Do some profiling. JJJ |
6885 | 2041 if (fl->total_size() > allocation_from_dictionary_limit) { |
2042 p = fl->get_block(raw_word_size); | |
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2043 } |
6885 | 2044 if (p == NULL) { |
2045 p = allocate_work(raw_word_size); | |
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2046 } |
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2047 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
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2048 |
6885 | 2049 return p; |
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2050 } |
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2051 |
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2052 // Returns the address of spaced allocated for "word_size". |
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2053 // This methods does not know about blocks (Metablocks) |
6885 | 2054 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
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2055 assert_lock_strong(_lock); |
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2056 #ifdef ASSERT |
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2057 if (Metadebug::test_metadata_failure()) { |
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2058 return NULL; |
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2059 } |
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2060 #endif |
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2061 // Is there space in the current chunk? |
6885 | 2062 MetaWord* result = NULL; |
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2063 |
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2064 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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2065 // never null because we gave it the size we wanted. Caller reports out |
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2066 // of memory if this returns null. |
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2067 if (DumpSharedSpaces) { |
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2068 assert(current_chunk() != NULL, "should never happen"); |
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2069 inc_allocation_total(word_size); |
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2070 return current_chunk()->allocate(word_size); // caller handles null result |
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2071 } |
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2072 if (current_chunk() != NULL) { |
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2073 result = current_chunk()->allocate(word_size); |
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2074 } |
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2075 |
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2076 if (result == NULL) { |
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2077 result = grow_and_allocate(word_size); |
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2078 } |
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2079 if (result > 0) { |
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2080 inc_allocation_total(word_size); |
6885 | 2081 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2082 "Head of the list is being allocated"); | |
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2083 } |
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2084 |
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2085 return result; |
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2086 } |
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2087 |
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2088 void SpaceManager::verify() { |
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2089 // If there are blocks in the dictionary, then |
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2090 // verfication of chunks does not work since |
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2091 // being in the dictionary alters a chunk. |
6885 | 2092 if (block_freelists()->total_size() == 0) { |
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2093 // Skip the small chunks because their next link points to |
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2094 // medium chunks. This is because the small chunk is the |
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2095 // current chunk (for allocations) until it is full and the |
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2096 // the addition of the next chunk does not NULL the next |
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2097 // like of the small chunk. |
6885 | 2098 for (ChunkIndex i = MediumIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2099 Metachunk* curr = chunks_in_use(i); |
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2100 while (curr != NULL) { |
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2101 curr->verify(); |
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2102 verify_chunk_size(curr); |
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2103 curr = curr->next(); |
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2104 } |
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2105 } |
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2106 } |
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2107 } |
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2108 |
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2109 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
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2110 assert(is_humongous(chunk->word_size()) || |
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2111 chunk->word_size() == MediumChunk || |
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2112 chunk->word_size() == SmallChunk, |
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2113 "Chunk size is wrong"); |
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2114 return; |
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2115 } |
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2116 |
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2117 #ifdef ASSERT |
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2118 void SpaceManager::verify_allocation_total() { |
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2119 #if 0 |
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2120 // Verification is only guaranteed at a safepoint. |
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2121 if (SafepointSynchronize::is_at_safepoint()) { |
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2122 gclog_or_tty->print_cr("Chunk " PTR_FORMAT " allocation_total " SIZE_FORMAT |
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2123 " sum_used_in_chunks_in_use " SIZE_FORMAT, |
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2124 this, |
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2125 allocation_total(), |
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2126 sum_used_in_chunks_in_use()); |
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2127 } |
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2128 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2129 assert(allocation_total() == sum_used_in_chunks_in_use(), |
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2130 err_msg("allocation total is not consistent %d vs %d", |
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2131 allocation_total(), sum_used_in_chunks_in_use())); |
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2132 #endif |
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2133 } |
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2134 |
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2135 #endif |
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2136 |
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2137 void SpaceManager::dump(outputStream* const out) const { |
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2138 size_t curr_total = 0; |
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2139 size_t waste = 0; |
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2140 uint i = 0; |
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2141 size_t used = 0; |
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2142 size_t capacity = 0; |
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2143 |
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2144 // Add up statistics for all chunks in this SpaceManager. |
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2145 for (ChunkIndex index = SmallIndex; |
6885 | 2146 index < NumberOfInUseLists; |
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2147 index = next_chunk_index(index)) { |
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2148 for (Metachunk* curr = chunks_in_use(index); |
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2149 curr != NULL; |
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2150 curr = curr->next()) { |
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2151 out->print("%d) ", i++); |
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2152 curr->print_on(out); |
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2153 if (TraceMetadataChunkAllocation && Verbose) { |
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2154 block_freelists()->print_on(out); |
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2155 } |
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2156 curr_total += curr->word_size(); |
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2157 used += curr->used_word_size(); |
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2158 capacity += curr->capacity_word_size(); |
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2159 waste += curr->free_word_size() + curr->overhead();; |
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2160 } |
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2161 } |
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2162 |
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2163 size_t free = current_chunk()->free_word_size(); |
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2164 // Free space isn't wasted. |
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2165 waste -= free; |
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|
2166 |
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2167 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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2168 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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2169 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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2170 } |
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|
2171 |
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2172 #ifndef PRODUCT |
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2173 void SpaceManager::mangle_freed_chunks() { |
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2174 for (ChunkIndex index = SmallIndex; |
6885 | 2175 index < NumberOfInUseLists; |
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2176 index = next_chunk_index(index)) { |
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|
2177 for (Metachunk* curr = chunks_in_use(index); |
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2178 curr != NULL; |
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|
2179 curr = curr->next()) { |
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|
2180 // Try to detect incorrectly terminated small chunk |
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|
2181 // list. |
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|
2182 assert(index == MediumIndex || curr != chunks_in_use(MediumIndex), |
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2183 err_msg("Mangling medium chunks in small chunks? " |
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|
2184 "curr " PTR_FORMAT " medium list " PTR_FORMAT, |
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2185 curr, chunks_in_use(MediumIndex))); |
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|
2186 curr->mangle(); |
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|
2187 } |
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|
2188 } |
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|
2189 } |
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2190 #endif // PRODUCT |
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|
2191 |
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|
2192 |
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|
2193 // MetaspaceAux |
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|
2194 |
6734 | 2195 size_t MetaspaceAux::used_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2196 size_t used = 0; |
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|
2197 ClassLoaderDataGraphMetaspaceIterator iter; |
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2198 while (iter.repeat()) { |
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2199 Metaspace* msp = iter.get_next(); |
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2200 // Sum allocation_total for each metaspace |
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2201 if (msp != NULL) { |
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|
2202 used += msp->used_words(mdtype); |
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2203 } |
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|
2204 } |
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|
2205 return used * BytesPerWord; |
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|
2206 } |
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|
2207 |
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2208 size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2209 size_t free = 0; |
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|
2210 ClassLoaderDataGraphMetaspaceIterator iter; |
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2211 while (iter.repeat()) { |
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2212 Metaspace* msp = iter.get_next(); |
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2213 if (msp != NULL) { |
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2214 free += msp->free_words(mdtype); |
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|
2215 } |
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|
2216 } |
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2217 return free * BytesPerWord; |
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|
2218 } |
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|
2219 |
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2220 size_t MetaspaceAux::capacity_in_bytes(Metaspace::MetadataType mdtype) { |
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2221 size_t capacity = free_chunks_total(mdtype); |
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2222 ClassLoaderDataGraphMetaspaceIterator iter; |
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2223 while (iter.repeat()) { |
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2224 Metaspace* msp = iter.get_next(); |
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2225 if (msp != NULL) { |
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2226 capacity += msp->capacity_words(mdtype); |
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2227 } |
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2228 } |
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2229 return capacity * BytesPerWord; |
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2230 } |
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2231 |
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2232 size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
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2233 size_t reserved = (mdtype == Metaspace::ClassType) ? |
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2234 Metaspace::class_space_list()->virtual_space_total() : |
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2235 Metaspace::space_list()->virtual_space_total(); |
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2236 return reserved * BytesPerWord; |
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2237 } |
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2238 |
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2239 size_t MetaspaceAux::min_chunk_size() { return SpaceManager::MediumChunk; } |
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|
2240 |
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2241 size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
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2242 ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
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2243 Metaspace::class_space_list()->chunk_manager() : |
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2244 Metaspace::space_list()->chunk_manager(); |
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2245 chunk->slow_verify(); |
6725
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2246 return chunk->free_chunks_total(); |
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2247 } |
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2248 |
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2249 size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
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2250 return free_chunks_total(mdtype) * BytesPerWord; |
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2251 } |
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2252 |
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2253 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
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2254 gclog_or_tty->print(", [Metaspace:"); |
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2255 if (PrintGCDetails && Verbose) { |
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2256 gclog_or_tty->print(" " SIZE_FORMAT |
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2257 "->" SIZE_FORMAT |
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2258 "(" SIZE_FORMAT "/" SIZE_FORMAT ")", |
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2259 prev_metadata_used, |
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2260 used_in_bytes(), |
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2261 capacity_in_bytes(), |
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2262 reserved_in_bytes()); |
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2263 } else { |
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2264 gclog_or_tty->print(" " SIZE_FORMAT "K" |
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2265 "->" SIZE_FORMAT "K" |
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2266 "(" SIZE_FORMAT "K/" SIZE_FORMAT "K)", |
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2267 prev_metadata_used / K, |
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2268 used_in_bytes()/ K, |
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2269 capacity_in_bytes()/K, |
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2270 reserved_in_bytes()/ K); |
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2271 } |
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2272 |
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2273 gclog_or_tty->print("]"); |
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2274 } |
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2275 |
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2276 // This is printed when PrintGCDetails |
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2277 void MetaspaceAux::print_on(outputStream* out) { |
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2278 Metaspace::MetadataType ct = Metaspace::ClassType; |
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2279 Metaspace::MetadataType nct = Metaspace::NonClassType; |
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2280 |
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2281 out->print_cr(" Metaspace total " |
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2282 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2283 " reserved " SIZE_FORMAT "K", |
6734 | 2284 capacity_in_bytes()/K, used_in_bytes()/K, reserved_in_bytes()/K); |
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2285 out->print_cr(" data space " |
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2286 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2287 " reserved " SIZE_FORMAT "K", |
6734 | 2288 capacity_in_bytes(nct)/K, used_in_bytes(nct)/K, reserved_in_bytes(nct)/K); |
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2289 out->print_cr(" class space " |
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2290 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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2291 " reserved " SIZE_FORMAT "K", |
6734 | 2292 capacity_in_bytes(ct)/K, used_in_bytes(ct)/K, reserved_in_bytes(ct)/K); |
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2293 } |
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2294 |
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2295 // Print information for class space and data space separately. |
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2296 // This is almost the same as above. |
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2297 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
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2298 size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
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2299 size_t capacity_bytes = capacity_in_bytes(mdtype); |
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2300 size_t used_bytes = used_in_bytes(mdtype); |
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2301 size_t free_bytes = free_in_bytes(mdtype); |
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2302 size_t used_and_free = used_bytes + free_bytes + |
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2303 free_chunks_capacity_bytes; |
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2304 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
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2305 "K + unused in chunks " SIZE_FORMAT "K + " |
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2306 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
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2307 "K capacity in allocated chunks " SIZE_FORMAT "K", |
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2308 used_bytes / K, |
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2309 free_bytes / K, |
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2310 free_chunks_capacity_bytes / K, |
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2311 used_and_free / K, |
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2312 capacity_bytes / K); |
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2313 assert(used_and_free == capacity_bytes, "Accounting is wrong"); |
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2314 } |
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2315 |
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2316 // Print total fragmentation for class and data metaspaces separately |
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2317 void MetaspaceAux::print_waste(outputStream* out) { |
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2318 |
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2319 size_t small_waste = 0, medium_waste = 0, large_waste = 0; |
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2320 size_t cls_small_waste = 0, cls_medium_waste = 0, cls_large_waste = 0; |
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2321 |
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2322 ClassLoaderDataGraphMetaspaceIterator iter; |
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2323 while (iter.repeat()) { |
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2324 Metaspace* msp = iter.get_next(); |
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2325 if (msp != NULL) { |
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2326 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2327 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2328 large_waste += msp->vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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2329 |
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2330 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2331 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2332 cls_large_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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2333 } |
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2334 } |
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2335 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
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2336 out->print(" data: small " SIZE_FORMAT " medium " SIZE_FORMAT, |
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2337 small_waste, medium_waste); |
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2338 out->print_cr(" class: small " SIZE_FORMAT, cls_small_waste); |
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2339 } |
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2340 |
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2341 // Dump global metaspace things from the end of ClassLoaderDataGraph |
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2342 void MetaspaceAux::dump(outputStream* out) { |
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2343 out->print_cr("All Metaspace:"); |
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2344 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
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2345 out->print("class space: "); print_on(out, Metaspace::ClassType); |
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2346 print_waste(out); |
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2347 } |
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2348 |
6969
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2349 void MetaspaceAux::verify_free_chunks() { |
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2350 Metaspace::space_list()->chunk_manager()->verify(); |
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2351 Metaspace::class_space_list()->chunk_manager()->verify(); |
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2352 } |
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2353 |
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2354 // Metaspace methods |
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2355 |
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2356 size_t Metaspace::_first_chunk_word_size = 0; |
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2357 |
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2358 Metaspace::Metaspace(Mutex* lock, size_t word_size) { |
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2359 initialize(lock, word_size); |
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2360 } |
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2361 |
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2362 Metaspace::Metaspace(Mutex* lock) { |
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2363 initialize(lock); |
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2364 } |
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2365 |
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2366 Metaspace::~Metaspace() { |
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2367 delete _vsm; |
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2368 delete _class_vsm; |
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2369 } |
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2370 |
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2371 VirtualSpaceList* Metaspace::_space_list = NULL; |
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2372 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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2373 |
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2374 #define VIRTUALSPACEMULTIPLIER 2 |
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|
2375 |
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|
2376 void Metaspace::global_initialize() { |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2377 // Initialize the alignment for shared spaces. |
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2378 int max_alignment = os::vm_page_size(); |
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|
2379 MetaspaceShared::set_max_alignment(max_alignment); |
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|
2380 |
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|
2381 if (DumpSharedSpaces) { |
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2382 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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2383 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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|
2384 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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2385 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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|
2386 |
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2387 // Initialize with the sum of the shared space sizes. The read-only |
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diff
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|
2388 // and read write metaspace chunks will be allocated out of this and the |
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2389 // remainder is the misc code and data chunks. |
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2390 size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
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|
2391 SharedMiscDataSize + SharedMiscCodeSize, |
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diff
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|
2392 os::vm_allocation_granularity()); |
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|
2393 size_t word_size = total/wordSize; |
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|
2394 _space_list = new VirtualSpaceList(word_size); |
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6964458: Reimplement class meta-data storage to use native memory
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|
2395 } else { |
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|
2396 // If using shared space, open the file that contains the shared space |
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2397 // and map in the memory before initializing the rest of metaspace (so |
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|
2398 // the addresses don't conflict) |
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diff
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|
2399 if (UseSharedSpaces) { |
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|
2400 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
2401 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
2402 |
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|
2403 // Open the shared archive file, read and validate the header. If |
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|
2404 // initialization fails, shared spaces [UseSharedSpaces] are |
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diff
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|
2405 // disabled and the file is closed. |
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|
2406 // Map in spaces now also |
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|
2407 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
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|
2408 FileMapInfo::set_current_info(mapinfo); |
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|
2409 } else { |
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|
2410 assert(!mapinfo->is_open() && !UseSharedSpaces, |
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|
2411 "archive file not closed or shared spaces not disabled."); |
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diff
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|
2412 } |
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diff
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|
2413 } |
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diff
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|
2414 |
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|
2415 // Initialize this before initializing the VirtualSpaceList |
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|
2416 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
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|
2417 // Arbitrarily set the initial virtual space to a multiple |
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diff
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|
2418 // of the boot class loader size. |
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|
2419 size_t word_size = VIRTUALSPACEMULTIPLIER * Metaspace::first_chunk_word_size(); |
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|
2420 // Initialize the list of virtual spaces. |
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|
2421 _space_list = new VirtualSpaceList(word_size); |
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diff
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|
2422 } |
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diff
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|
2423 } |
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diff
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|
2424 |
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|
2425 // For UseCompressedKlassPointers the class space is reserved as a piece of the |
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|
2426 // Java heap because the compression algorithm is the same for each. The |
da91efe96a93
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parents:
diff
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|
2427 // argument passed in is at the top of the compressed space |
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diff
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|
2428 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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|
2429 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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diff
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|
2430 assert(rs.size() >= ClassMetaspaceSize, err_msg("%d != %d", rs.size(), ClassMetaspaceSize)); |
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|
2431 _class_space_list = new VirtualSpaceList(rs); |
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diff
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|
2432 } |
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diff
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|
2433 |
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|
2434 |
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|
2435 void Metaspace::initialize(Mutex* lock, size_t initial_size) { |
6736
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
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diff
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|
2436 // Use SmallChunk size if not specified. If specified, use this size for |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
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diff
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|
2437 // the data metaspace. |
6725
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diff
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|
2438 size_t word_size; |
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diff
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|
2439 size_t class_word_size; |
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diff
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|
2440 if (initial_size == 0) { |
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diff
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|
2441 word_size = (size_t) SpaceManager::SmallChunk; |
6736
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
parents:
6734
diff
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|
2442 class_word_size = (size_t) SpaceManager::SmallChunk; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2443 } else { |
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diff
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|
2444 word_size = initial_size; |
6736
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
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6734
diff
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|
2445 // Make the first class chunk bigger than a medium chunk so it's not put |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
parents:
6734
diff
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|
2446 // on the medium chunk list. The next chunk will be small and progress |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
parents:
6734
diff
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|
2447 // from there. This size calculated by -version. |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
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6734
diff
changeset
|
2448 class_word_size = MIN2((size_t)SpaceManager::MediumChunk*5, |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
parents:
6734
diff
changeset
|
2449 (ClassMetaspaceSize/BytesPerWord)*2); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2450 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2451 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2452 assert(space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2453 "Metadata VirtualSpaceList has not been initialized"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2454 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2455 _vsm = new SpaceManager(lock, space_list()); |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2456 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2457 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2458 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2459 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2460 assert(class_space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2461 "Class VirtualSpaceList has not been initialized"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2462 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2463 // Allocate SpaceManager for classes. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2464 _class_vsm = new SpaceManager(lock, class_space_list()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2465 if (_class_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2466 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2467 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2468 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2469 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2470 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2471 // Allocate chunk for metadata objects |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2472 Metachunk* new_chunk = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2473 space_list()->current_virtual_space()->get_chunk_vs_with_expand(word_size); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2474 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2475 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2476 // Add to this manager's list of chunks in use and current_chunk(). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2477 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2478 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2479 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2480 // Allocate chunk for class metadata objects |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2481 Metachunk* class_chunk = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2482 class_space_list()->current_virtual_space()->get_chunk_vs_with_expand(class_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2483 if (class_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2484 class_vsm()->add_chunk(class_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2485 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2486 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2487 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2488 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2489 // DumpSharedSpaces doesn't use class metadata area (yet) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2490 if (mdtype == ClassType && !DumpSharedSpaces) { |
6885 | 2491 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2492 } else { |
6885 | 2493 return vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2494 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2495 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2496 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2497 MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2498 MetaWord* result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2499 MetaspaceGC::set_expand_after_GC(true); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2500 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2501 size_t delta_words = MetaspaceGC::delta_capacity_until_GC(word_size); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2502 MetaspaceGC::inc_capacity_until_GC(delta_words); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2503 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2504 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2505 " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
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|
2506 } |
6885 | 2507 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2508 result = allocate(word_size, mdtype); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2509 |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2510 return result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2511 } |
8da5e203b993
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jmasa
parents:
6736
diff
changeset
|
2512 |
6725
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diff
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|
2513 // Space allocated in the Metaspace. This may |
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parents:
diff
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|
2514 // be across several metadata virtual spaces. |
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diff
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|
2515 char* Metaspace::bottom() const { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2516 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
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diff
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|
2517 return (char*)vsm()->current_chunk()->bottom(); |
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diff
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|
2518 } |
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diff
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|
2519 |
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6964458: Reimplement class meta-data storage to use native memory
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|
2520 size_t Metaspace::used_words(MetadataType mdtype) const { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2521 // return vsm()->allocation_total(); |
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diff
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|
2522 return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
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parents:
diff
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|
2523 vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2524 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2525 |
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6964458: Reimplement class meta-data storage to use native memory
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|
2526 size_t Metaspace::free_words(MetadataType mdtype) const { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2527 return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
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6964458: Reimplement class meta-data storage to use native memory
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|
2528 vsm()->sum_free_in_chunks_in_use(); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2529 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2530 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
2531 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2532 // space in the list of chunks from which allocations |
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coleenp
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diff
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|
2533 // have been made. Don't include space in the global freelist and |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2534 // in the space available in the dictionary which |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2535 // is already counted in some chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2536 size_t Metaspace::capacity_words(MetadataType mdtype) const { |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2537 return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
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|
2538 vsm()->sum_capacity_in_chunks_in_use(); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2539 } |
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diff
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|
2540 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2541 void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2542 if (SafepointSynchronize::is_at_safepoint()) { |
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parents:
diff
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|
2543 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 2544 // Don't take Heap_lock |
2545 MutexLocker ml(vsm()->lock()); | |
2546 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { | |
2547 // Dark matter. Too small for dictionary. | |
2548 #ifdef ASSERT | |
2549 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2550 #endif | |
2551 return; | |
6725
da91efe96a93
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parents:
diff
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|
2552 } |
6885 | 2553 if (is_class) { |
2554 class_vsm()->deallocate(ptr, word_size); | |
2555 } else { | |
2556 vsm()->deallocate(ptr, word_size); | |
2557 } | |
6725
da91efe96a93
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parents:
diff
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|
2558 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2559 MutexLocker ml(vsm()->lock()); |
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coleenp
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diff
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|
2560 |
6885 | 2561 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
2562 // Dark matter. Too small for dictionary. | |
2563 #ifdef ASSERT | |
2564 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2565 #endif | |
2566 return; | |
6725
da91efe96a93
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diff
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|
2567 } |
6885 | 2568 if (is_class) { |
2569 class_vsm()->deallocate(ptr, word_size); | |
2570 } else { | |
2571 vsm()->deallocate(ptr, word_size); | |
2572 } | |
6725
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diff
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|
2573 } |
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diff
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|
2574 } |
da91efe96a93
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diff
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|
2575 |
6885 | 2576 Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
6725
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diff
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|
2577 bool read_only, MetadataType mdtype, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2578 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
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coleenp
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diff
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|
2579 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2580 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
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parents:
diff
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|
2581 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2582 |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2583 // SSS: Should we align the allocations and make sure the sizes are aligned. |
da91efe96a93
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coleenp
parents:
diff
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|
2584 MetaWord* result = NULL; |
da91efe96a93
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diff
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|
2585 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2586 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2587 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2588 // Allocate in metaspaces without taking out a lock, because it deadlocks |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2589 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2590 // to revisit this for application class data sharing. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2591 if (DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2592 if (read_only) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2593 result = loader_data->ro_metaspace()->allocate(word_size, NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2594 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2595 result = loader_data->rw_metaspace()->allocate(word_size, NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2596 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2597 if (result == NULL) { |
da91efe96a93
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parents:
diff
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|
2598 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2599 } |
6885 | 2600 return Metablock::initialize(result, word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2601 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2602 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2603 result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
da91efe96a93
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diff
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|
2604 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2605 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2606 // Try to clean out some memory and retry. |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2607 result = |
6885 | 2608 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2609 loader_data, word_size, mdtype); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2610 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2611 // If result is still null, we are out of memory. |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2612 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2613 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2614 report_java_out_of_memory("Metadata space"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2615 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2616 if (JvmtiExport::should_post_resource_exhausted()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2617 JvmtiExport::post_resource_exhausted( |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2618 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2619 "Metadata space"); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2620 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2621 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2622 } |
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diff
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|
2623 } |
6885 | 2624 return Metablock::initialize(result, word_size); |
6725
da91efe96a93
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coleenp
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diff
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|
2625 } |
da91efe96a93
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diff
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|
2626 |
da91efe96a93
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diff
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|
2627 void Metaspace::print_on(outputStream* out) const { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2628 // Print both class virtual space counts and metaspace. |
da91efe96a93
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coleenp
parents:
diff
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|
2629 if (Verbose) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2630 vsm()->print_on(out); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2631 class_vsm()->print_on(out); |
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diff
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|
2632 } |
da91efe96a93
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diff
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|
2633 } |
da91efe96a93
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diff
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|
2634 |
7176
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
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6969
diff
changeset
|
2635 bool Metaspace::contains(const void * ptr) { |
6725
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coleenp
parents:
diff
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|
2636 if (MetaspaceShared::is_in_shared_space(ptr)) { |
da91efe96a93
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parents:
diff
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|
2637 return true; |
da91efe96a93
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diff
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|
2638 } |
7176
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
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6969
diff
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|
2639 // This is checked while unlocked. As long as the virtualspaces are added |
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents:
6969
diff
changeset
|
2640 // at the end, the pointer will be in one of them. The virtual spaces |
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents:
6969
diff
changeset
|
2641 // aren't deleted presently. When they are, some sort of locking might |
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents:
6969
diff
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|
2642 // be needed. Note, locking this can cause inversion problems with the |
59c790074993
8003635: NPG: AsynchGetCallTrace broken by Method* virtual call
coleenp
parents:
6969
diff
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|
2643 // caller in MetaspaceObj::is_metadata() function. |
6725
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diff
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|
2644 return space_list()->contains(ptr) || class_space_list()->contains(ptr); |
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parents:
diff
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|
2645 } |
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diff
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|
2646 |
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diff
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|
2647 void Metaspace::verify() { |
da91efe96a93
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diff
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|
2648 vsm()->verify(); |
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diff
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|
2649 class_vsm()->verify(); |
da91efe96a93
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diff
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|
2650 } |
da91efe96a93
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diff
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|
2651 |
da91efe96a93
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diff
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|
2652 void Metaspace::dump(outputStream* const out) const { |
da91efe96a93
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coleenp
parents:
diff
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|
2653 if (UseMallocOnly) { |
da91efe96a93
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parents:
diff
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|
2654 // Just print usage for now |
da91efe96a93
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2655 out->print_cr("usage %d", used_words(Metaspace::NonClassType)); |
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6964458: Reimplement class meta-data storage to use native memory
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2656 } |
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2657 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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2658 vsm()->dump(out); |
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2659 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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2660 class_vsm()->dump(out); |
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6964458: Reimplement class meta-data storage to use native memory
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2661 } |