Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/metaspace.cpp @ 6969:6bc207d87e5d
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Summary: Reduce the amount of calls to ChunkManager verification code
Reviewed-by: jmasa, coleenp
author | mgerdin |
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date | Fri, 09 Nov 2012 00:38:31 +0100 |
parents | 685df3c6f84b |
children | 59c790074993 90273fc0a981 |
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 "services/memTracker.hpp" |
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40 #include "utilities/copy.hpp" |
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41 #include "utilities/debug.hpp" |
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42 |
6885 | 43 typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
44 typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; | |
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45 // Define this macro to enable slow integrity checking of |
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46 // the free chunk lists |
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47 const bool metaspace_slow_verify = false; |
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48 |
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49 |
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50 // Parameters for stress mode testing |
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51 const uint metadata_deallocate_a_lot_block = 10; |
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52 const uint metadata_deallocate_a_lock_chunk = 3; |
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53 size_t const allocation_from_dictionary_limit = 64 * K; |
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54 const size_t metadata_chunk_initialize = 0xf7f7f7f7; |
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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 // Future modification |
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96 // |
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97 // The Metachunk can conceivable be replaced by the Chunk in |
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98 // allocation.hpp. Note that the latter Chunk is the space for |
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99 // allocation (allocations from the chunk are out of the space in |
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100 // the Chunk after the header for the Chunk) where as Metachunks |
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101 // point to space in a VirtualSpace. To replace Metachunks with |
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102 // Chunks, change Chunks so that they can be allocated out of a VirtualSpace. |
6885 | 103 size_t Metablock::_min_block_byte_size = sizeof(Metablock); |
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104 #ifdef ASSERT |
6885 | 105 size_t Metablock::_overhead = |
106 Chunk::aligned_overhead_size(sizeof(Metablock)) / BytesPerWord; | |
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107 #else |
6885 | 108 size_t Metablock::_overhead = 0; |
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109 #endif |
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110 |
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111 |
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112 // Pointer to list of Metachunks. |
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113 class ChunkList VALUE_OBJ_CLASS_SPEC { |
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114 // List of free chunks |
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115 Metachunk* _head; |
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116 |
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117 public: |
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118 // Constructor |
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119 ChunkList() : _head(NULL) {} |
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120 |
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121 // Accessors |
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122 Metachunk* head() { return _head; } |
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123 void set_head(Metachunk* v) { _head = v; } |
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124 |
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125 // Link at head of the list |
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126 void add_at_head(Metachunk* head, Metachunk* tail); |
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127 void add_at_head(Metachunk* head); |
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128 |
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129 size_t sum_list_size(); |
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130 size_t sum_list_count(); |
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131 size_t sum_list_capacity(); |
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132 }; |
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133 |
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134 // Manages the global free lists of chunks. |
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135 // Has three lists of free chunks, and a total size and |
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136 // count that includes all three |
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137 |
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138 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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139 |
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140 // Free list of chunks of different sizes. |
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141 // SmallChunk |
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142 // MediumChunk |
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143 // HumongousChunk |
6885 | 144 ChunkList _free_chunks[NumberOfFreeLists]; |
145 | |
146 // HumongousChunk | |
147 ChunkTreeDictionary _humongous_dictionary; | |
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148 |
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149 // ChunkManager in all lists of this type |
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150 size_t _free_chunks_total; |
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151 size_t _free_chunks_count; |
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152 |
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153 void dec_free_chunks_total(size_t v) { |
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154 assert(_free_chunks_count > 0 && |
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155 _free_chunks_total > 0, |
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156 "About to go negative"); |
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157 Atomic::add_ptr(-1, &_free_chunks_count); |
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158 jlong minus_v = (jlong) - (jlong) v; |
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159 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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160 } |
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161 |
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162 // Debug support |
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163 |
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164 size_t sum_free_chunks(); |
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165 size_t sum_free_chunks_count(); |
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166 |
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167 void locked_verify_free_chunks_total(); |
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168 void slow_locked_verify_free_chunks_total() { |
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169 if (metaspace_slow_verify) { |
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170 locked_verify_free_chunks_total(); |
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171 } |
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172 } |
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173 void locked_verify_free_chunks_count(); |
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174 void slow_locked_verify_free_chunks_count() { |
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175 if (metaspace_slow_verify) { |
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176 locked_verify_free_chunks_count(); |
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177 } |
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178 } |
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179 void verify_free_chunks_count(); |
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180 |
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181 public: |
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182 |
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183 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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184 |
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185 // add or delete (return) a chunk to the global freelist. |
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186 Metachunk* chunk_freelist_allocate(size_t word_size); |
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187 void chunk_freelist_deallocate(Metachunk* chunk); |
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188 |
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189 // Total of the space in the free chunks list |
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190 size_t free_chunks_total(); |
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191 size_t free_chunks_total_in_bytes(); |
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192 |
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193 // Number of chunks in the free chunks list |
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194 size_t free_chunks_count(); |
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195 |
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196 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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197 Atomic::add_ptr(count, &_free_chunks_count); |
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198 Atomic::add_ptr(v, &_free_chunks_total); |
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199 } |
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200 ChunkList* free_medium_chunks() { return &_free_chunks[1]; } |
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201 ChunkList* free_small_chunks() { return &_free_chunks[0]; } |
6885 | 202 ChunkTreeDictionary* humongous_dictionary() { |
203 return &_humongous_dictionary; | |
204 } | |
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205 |
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206 ChunkList* free_chunks(ChunkIndex index); |
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207 |
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208 // Returns the list for the given chunk word size. |
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209 ChunkList* find_free_chunks_list(size_t word_size); |
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210 |
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211 // Add and remove from a list by size. Selects |
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212 // list based on size of chunk. |
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213 void free_chunks_put(Metachunk* chuck); |
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214 Metachunk* free_chunks_get(size_t chunk_word_size); |
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215 |
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216 // Debug support |
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217 void verify(); |
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218 void slow_verify() { |
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219 if (metaspace_slow_verify) { |
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220 verify(); |
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221 } |
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222 } |
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223 void locked_verify(); |
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224 void slow_locked_verify() { |
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225 if (metaspace_slow_verify) { |
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226 locked_verify(); |
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227 } |
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228 } |
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229 void verify_free_chunks_total(); |
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230 |
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231 void locked_print_free_chunks(outputStream* st); |
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232 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 233 |
234 void print_on(outputStream* st); | |
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235 }; |
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236 |
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237 |
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238 // Used to manage the free list of Metablocks (a block corresponds |
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239 // to the allocation of a quantum of metadata). |
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240 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 241 BlockTreeDictionary* _dictionary; |
242 static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); | |
243 | |
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244 // Accessors |
6885 | 245 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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246 |
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247 public: |
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248 BlockFreelist(); |
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249 ~BlockFreelist(); |
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250 |
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251 // Get and return a block to the free list |
6885 | 252 MetaWord* get_block(size_t word_size); |
253 void return_block(MetaWord* p, size_t word_size); | |
254 | |
255 size_t total_size() { | |
256 if (dictionary() == NULL) { | |
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257 return 0; |
6885 | 258 } else { |
259 return dictionary()->total_size(); | |
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260 } |
6885 | 261 } |
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262 |
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263 void print_on(outputStream* st) const; |
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264 }; |
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265 |
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266 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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267 friend class VirtualSpaceList; |
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268 |
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269 // Link to next VirtualSpaceNode |
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270 VirtualSpaceNode* _next; |
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271 |
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272 // total in the VirtualSpace |
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273 MemRegion _reserved; |
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274 ReservedSpace _rs; |
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275 VirtualSpace _virtual_space; |
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276 MetaWord* _top; |
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277 |
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278 // Convenience functions for logical bottom and end |
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279 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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280 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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281 |
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282 // Convenience functions to access the _virtual_space |
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283 char* low() const { return virtual_space()->low(); } |
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284 char* high() const { return virtual_space()->high(); } |
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285 |
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286 public: |
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287 |
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288 VirtualSpaceNode(size_t byte_size); |
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289 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs) {} |
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290 ~VirtualSpaceNode(); |
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291 |
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292 // address of next available space in _virtual_space; |
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293 // Accessors |
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294 VirtualSpaceNode* next() { return _next; } |
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295 void set_next(VirtualSpaceNode* v) { _next = v; } |
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296 |
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297 void set_reserved(MemRegion const v) { _reserved = v; } |
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298 void set_top(MetaWord* v) { _top = v; } |
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299 |
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300 // Accessors |
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301 MemRegion* reserved() { return &_reserved; } |
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302 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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303 |
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304 // Returns true if "word_size" is available in the virtual space |
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305 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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306 |
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307 MetaWord* top() const { return _top; } |
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308 void inc_top(size_t word_size) { _top += word_size; } |
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309 |
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310 // used and capacity in this single entry in the list |
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311 size_t used_words_in_vs() const; |
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312 size_t capacity_words_in_vs() const; |
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313 |
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314 bool initialize(); |
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315 |
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316 // get space from the virtual space |
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317 Metachunk* take_from_committed(size_t chunk_word_size); |
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318 |
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319 // Allocate a chunk from the virtual space and return it. |
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320 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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321 Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
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322 |
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323 // Expands/shrinks the committed space in a virtual space. Delegates |
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324 // to Virtualspace |
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325 bool expand_by(size_t words, bool pre_touch = false); |
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326 bool shrink_by(size_t words); |
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327 |
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328 // Debug support |
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329 static void verify_virtual_space_total(); |
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330 static void verify_virtual_space_count(); |
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331 void mangle(); |
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332 |
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333 void print_on(outputStream* st) const; |
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334 }; |
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335 |
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336 // byte_size is the size of the associated virtualspace. |
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337 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0) { |
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338 // This allocates memory with mmap. For DumpSharedspaces, allocate the |
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339 // space at low memory so that other shared images don't conflict. |
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340 // This is the same address as memory needed for UseCompressedOops but |
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341 // compressed oops don't work with CDS (offsets in metadata are wrong), so |
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342 // borrow the same address. |
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343 if (DumpSharedSpaces) { |
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344 char* shared_base = (char*)HeapBaseMinAddress; |
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345 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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346 if (_rs.is_reserved()) { |
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347 assert(_rs.base() == shared_base, "should match"); |
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348 } else { |
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349 // If we are dumping the heap, then allocate a wasted block of address |
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350 // space in order to push the heap to a lower address. This extra |
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351 // address range allows for other (or larger) libraries to be loaded |
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352 // without them occupying the space required for the shared spaces. |
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353 uintx reserved = 0; |
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354 uintx block_size = 64*1024*1024; |
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355 while (reserved < SharedDummyBlockSize) { |
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356 char* dummy = os::reserve_memory(block_size); |
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357 reserved += block_size; |
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358 } |
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359 _rs = ReservedSpace(byte_size); |
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360 } |
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361 MetaspaceShared::set_shared_rs(&_rs); |
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362 } else { |
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363 _rs = ReservedSpace(byte_size); |
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364 } |
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365 |
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366 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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367 } |
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368 |
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369 // List of VirtualSpaces for metadata allocation. |
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370 // It has a _next link for singly linked list and a MemRegion |
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371 // for total space in the VirtualSpace. |
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372 class VirtualSpaceList : public CHeapObj<mtClass> { |
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373 friend class VirtualSpaceNode; |
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374 |
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375 enum VirtualSpaceSizes { |
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376 VirtualSpaceSize = 256 * K |
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377 }; |
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378 |
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379 // Global list of virtual spaces |
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380 // Head of the list |
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381 VirtualSpaceNode* _virtual_space_list; |
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382 // virtual space currently being used for allocations |
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383 VirtualSpaceNode* _current_virtual_space; |
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384 // Free chunk list for all other metadata |
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385 ChunkManager _chunk_manager; |
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386 |
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387 // Can this virtual list allocate >1 spaces? Also, used to determine |
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388 // whether to allocate unlimited small chunks in this virtual space |
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389 bool _is_class; |
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390 bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
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391 |
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392 // Sum of space in all virtual spaces and number of virtual spaces |
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393 size_t _virtual_space_total; |
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394 size_t _virtual_space_count; |
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395 |
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396 ~VirtualSpaceList(); |
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397 |
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398 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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399 |
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400 void set_virtual_space_list(VirtualSpaceNode* v) { |
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401 _virtual_space_list = v; |
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402 } |
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403 void set_current_virtual_space(VirtualSpaceNode* v) { |
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404 _current_virtual_space = v; |
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405 } |
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406 |
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407 void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
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408 |
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409 // Get another virtual space and add it to the list. This |
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410 // is typically prompted by a failed attempt to allocate a chunk |
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411 // and is typically followed by the allocation of a chunk. |
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412 bool grow_vs(size_t vs_word_size); |
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413 |
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414 public: |
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415 VirtualSpaceList(size_t word_size); |
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416 VirtualSpaceList(ReservedSpace rs); |
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417 |
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418 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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419 |
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420 VirtualSpaceNode* current_virtual_space() { |
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421 return _current_virtual_space; |
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422 } |
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423 |
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424 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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425 bool is_class() const { return _is_class; } |
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426 |
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427 // Allocate the first virtualspace. |
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428 void initialize(size_t word_size); |
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429 |
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430 size_t virtual_space_total() { return _virtual_space_total; } |
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431 void inc_virtual_space_total(size_t v) { |
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432 Atomic::add_ptr(v, &_virtual_space_total); |
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433 } |
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434 |
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435 size_t virtual_space_count() { return _virtual_space_count; } |
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436 void inc_virtual_space_count() { |
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437 Atomic::inc_ptr(&_virtual_space_count); |
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438 } |
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439 |
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440 // Used and capacity in the entire list of virtual spaces. |
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441 // These are global values shared by all Metaspaces |
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442 size_t capacity_words_sum(); |
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443 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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444 size_t used_words_sum(); |
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445 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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446 |
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447 bool contains(const void *ptr); |
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448 |
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449 void print_on(outputStream* st) const; |
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450 |
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451 class VirtualSpaceListIterator : public StackObj { |
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452 VirtualSpaceNode* _virtual_spaces; |
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453 public: |
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454 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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455 _virtual_spaces(virtual_spaces) {} |
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456 |
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457 bool repeat() { |
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458 return _virtual_spaces != NULL; |
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459 } |
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460 |
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461 VirtualSpaceNode* get_next() { |
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462 VirtualSpaceNode* result = _virtual_spaces; |
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463 if (_virtual_spaces != NULL) { |
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464 _virtual_spaces = _virtual_spaces->next(); |
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465 } |
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466 return result; |
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467 } |
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468 }; |
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469 }; |
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470 |
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471 class Metadebug : AllStatic { |
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472 // Debugging support for Metaspaces |
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473 static int _deallocate_block_a_lot_count; |
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474 static int _deallocate_chunk_a_lot_count; |
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475 static int _allocation_fail_alot_count; |
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476 |
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477 public: |
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478 static int deallocate_block_a_lot_count() { |
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479 return _deallocate_block_a_lot_count; |
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480 } |
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481 static void set_deallocate_block_a_lot_count(int v) { |
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482 _deallocate_block_a_lot_count = v; |
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483 } |
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484 static void inc_deallocate_block_a_lot_count() { |
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485 _deallocate_block_a_lot_count++; |
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486 } |
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487 static int deallocate_chunk_a_lot_count() { |
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488 return _deallocate_chunk_a_lot_count; |
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489 } |
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490 static void reset_deallocate_chunk_a_lot_count() { |
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491 _deallocate_chunk_a_lot_count = 1; |
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492 } |
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493 static void inc_deallocate_chunk_a_lot_count() { |
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494 _deallocate_chunk_a_lot_count++; |
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495 } |
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496 |
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497 static void init_allocation_fail_alot_count(); |
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498 #ifdef ASSERT |
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499 static bool test_metadata_failure(); |
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500 #endif |
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501 |
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502 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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503 size_t chunk_word_size); |
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504 static void deallocate_block_a_lot(SpaceManager* sm, |
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505 size_t chunk_word_size); |
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506 |
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507 }; |
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508 |
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509 int Metadebug::_deallocate_block_a_lot_count = 0; |
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510 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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511 int Metadebug::_allocation_fail_alot_count = 0; |
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512 |
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513 // SpaceManager - used by Metaspace to handle allocations |
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514 class SpaceManager : public CHeapObj<mtClass> { |
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515 friend class Metaspace; |
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516 friend class Metadebug; |
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517 |
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518 private: |
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519 // protects allocations and contains. |
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520 Mutex* const _lock; |
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521 |
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522 // List of chunks in use by this SpaceManager. Allocations |
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523 // are done from the current chunk. The list is used for deallocating |
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524 // chunks when the SpaceManager is freed. |
6885 | 525 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
6725
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526 Metachunk* _current_chunk; |
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527 |
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528 // Virtual space where allocation comes from. |
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529 VirtualSpaceList* _vs_list; |
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530 |
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531 // Number of small chunks to allocate to a manager |
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532 // If class space manager, small chunks are unlimited |
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533 static uint const _small_chunk_limit; |
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534 bool has_small_chunk_limit() { return !vs_list()->is_class(); } |
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535 |
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536 // Sum of all space in allocated chunks |
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537 size_t _allocation_total; |
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538 |
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539 // Free lists of blocks are per SpaceManager since they |
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540 // are assumed to be in chunks in use by the SpaceManager |
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541 // and all chunks in use by a SpaceManager are freed when |
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542 // the class loader using the SpaceManager is collected. |
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543 BlockFreelist _block_freelists; |
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544 |
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545 // protects virtualspace and chunk expansions |
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546 static const char* _expand_lock_name; |
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547 static const int _expand_lock_rank; |
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548 static Mutex* const _expand_lock; |
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549 |
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550 // Accessors |
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551 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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552 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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553 |
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554 BlockFreelist* block_freelists() const { |
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555 return (BlockFreelist*) &_block_freelists; |
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556 } |
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557 |
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558 VirtualSpaceList* vs_list() const { return _vs_list; } |
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559 |
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560 Metachunk* current_chunk() const { return _current_chunk; } |
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561 void set_current_chunk(Metachunk* v) { |
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562 _current_chunk = v; |
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563 } |
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564 |
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565 Metachunk* find_current_chunk(size_t word_size); |
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566 |
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567 // Add chunk to the list of chunks in use |
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568 void add_chunk(Metachunk* v, bool make_current); |
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569 |
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570 Mutex* lock() const { return _lock; } |
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571 |
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572 public: |
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573 SpaceManager(Mutex* lock, VirtualSpaceList* vs_list); |
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574 ~SpaceManager(); |
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575 |
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576 enum ChunkSizes { // in words. |
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577 SmallChunk = 512, |
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578 MediumChunk = 8 * K, |
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579 MediumChunkBunch = 4 * MediumChunk |
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580 }; |
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581 |
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582 // Accessors |
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583 size_t allocation_total() const { return _allocation_total; } |
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584 void inc_allocation_total(size_t v) { Atomic::add_ptr(v, &_allocation_total); } |
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585 static bool is_humongous(size_t word_size) { return word_size > MediumChunk; } |
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586 |
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587 static Mutex* expand_lock() { return _expand_lock; } |
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588 |
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589 size_t sum_capacity_in_chunks_in_use() const; |
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590 size_t sum_used_in_chunks_in_use() const; |
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591 size_t sum_free_in_chunks_in_use() const; |
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592 size_t sum_waste_in_chunks_in_use() const; |
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593 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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594 |
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595 size_t sum_count_in_chunks_in_use(); |
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596 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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597 |
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598 // Block allocation and deallocation. |
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599 // Allocates a block from the current chunk |
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600 MetaWord* allocate(size_t word_size); |
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601 |
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602 // Helper for allocations |
6885 | 603 MetaWord* allocate_work(size_t word_size); |
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604 |
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605 // Returns a block to the per manager freelist |
6885 | 606 void deallocate(MetaWord* p, size_t word_size); |
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607 |
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608 // Based on the allocation size and a minimum chunk size, |
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609 // returned chunk size (for expanding space for chunk allocation). |
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610 size_t calc_chunk_size(size_t allocation_word_size); |
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611 |
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612 // Called when an allocation from the current chunk fails. |
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613 // Gets a new chunk (may require getting a new virtual space), |
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614 // and allocates from that chunk. |
6885 | 615 MetaWord* grow_and_allocate(size_t word_size); |
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616 |
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617 // debugging support. |
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618 |
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619 void dump(outputStream* const out) const; |
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620 void print_on(outputStream* st) const; |
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621 void locked_print_chunks_in_use_on(outputStream* st) const; |
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622 |
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623 void verify(); |
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624 #ifdef ASSERT |
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625 void mangle_freed_chunks(); |
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626 void verify_allocation_total(); |
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627 #endif |
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628 }; |
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629 |
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630 uint const SpaceManager::_small_chunk_limit = 4; |
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631 |
6885 | 632 |
633 | |
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634 const char* SpaceManager::_expand_lock_name = |
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635 "SpaceManager chunk allocation lock"; |
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636 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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637 Mutex* const SpaceManager::_expand_lock = |
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638 new Mutex(SpaceManager::_expand_lock_rank, |
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639 SpaceManager::_expand_lock_name, |
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640 Mutex::_allow_vm_block_flag); |
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641 |
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642 size_t Metachunk::_overhead = |
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643 Chunk::aligned_overhead_size(sizeof(Metachunk)) / BytesPerWord; |
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644 |
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645 // New blocks returned by the Metaspace are zero initialized. |
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646 // We should fix the constructors to not assume this instead. |
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647 Metablock* Metablock::initialize(MetaWord* p, size_t word_size) { |
6885 | 648 if (p == NULL) { |
649 return NULL; | |
650 } | |
651 | |
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652 Metablock* result = (Metablock*) p; |
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653 |
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654 // Clear the memory |
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655 Copy::fill_to_aligned_words((HeapWord*)result, word_size); |
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656 #ifdef ASSERT |
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657 result->set_word_size(word_size); |
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658 #endif |
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659 return result; |
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660 } |
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661 |
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662 // Metachunk methods |
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663 |
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664 Metachunk* Metachunk::initialize(MetaWord* ptr, size_t word_size) { |
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665 // Set bottom, top, and end. Allow space for the Metachunk itself |
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666 Metachunk* chunk = (Metachunk*) ptr; |
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667 |
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668 MetaWord* chunk_bottom = ptr + _overhead; |
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669 chunk->set_bottom(ptr); |
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670 chunk->set_top(chunk_bottom); |
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671 MetaWord* chunk_end = ptr + word_size; |
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672 assert(chunk_end > chunk_bottom, "Chunk must be too small"); |
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673 chunk->set_end(chunk_end); |
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674 chunk->set_next(NULL); |
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675 chunk->set_word_size(word_size); |
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676 #ifdef ASSERT |
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677 size_t data_word_size = pointer_delta(chunk_end, chunk_bottom, sizeof(MetaWord)); |
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678 Copy::fill_to_words((HeapWord*) chunk_bottom, data_word_size, metadata_chunk_initialize); |
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679 #endif |
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680 return chunk; |
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681 } |
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682 |
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683 |
6885 | 684 MetaWord* Metachunk::allocate(size_t word_size) { |
685 MetaWord* result = NULL; | |
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686 // If available, bump the pointer to allocate. |
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687 if (free_word_size() >= word_size) { |
6885 | 688 result = _top; |
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689 _top = _top + word_size; |
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690 } |
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691 return result; |
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692 } |
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693 |
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694 // _bottom points to the start of the chunk including the overhead. |
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695 size_t Metachunk::used_word_size() { |
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696 return pointer_delta(_top, _bottom, sizeof(MetaWord)); |
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697 } |
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698 |
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699 size_t Metachunk::free_word_size() { |
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700 return pointer_delta(_end, _top, sizeof(MetaWord)); |
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701 } |
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702 |
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703 size_t Metachunk::capacity_word_size() { |
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704 return pointer_delta(_end, _bottom, sizeof(MetaWord)); |
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705 } |
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706 |
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707 void Metachunk::print_on(outputStream* st) const { |
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708 st->print_cr("Metachunk:" |
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709 " bottom " PTR_FORMAT " top " PTR_FORMAT |
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710 " end " PTR_FORMAT " size " SIZE_FORMAT, |
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711 bottom(), top(), end(), word_size()); |
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712 } |
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713 |
6885 | 714 #ifdef ASSERT |
715 void Metachunk::mangle() { | |
716 // Mangle the payload of the chunk and not the links that | |
717 // maintain list of chunks. | |
718 HeapWord* start = (HeapWord*)(bottom() + overhead()); | |
719 size_t word_size = capacity_word_size() - overhead(); | |
720 Copy::fill_to_words(start, word_size, metadata_chunk_initialize); | |
721 } | |
722 #endif // ASSERT | |
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723 |
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724 void Metachunk::verify() { |
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725 #ifdef ASSERT |
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726 // Cannot walk through the blocks unless the blocks have |
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727 // headers with sizes. |
6885 | 728 assert(_bottom <= _top && |
729 _top <= _end, | |
730 "Chunk has been smashed"); | |
731 assert(SpaceManager::is_humongous(_word_size) || | |
732 _word_size == SpaceManager::MediumChunk || | |
733 _word_size == SpaceManager::SmallChunk, | |
734 "Chunk size is wrong"); | |
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735 #endif |
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736 return; |
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737 } |
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738 |
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739 // BlockFreelist methods |
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740 |
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741 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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742 |
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743 BlockFreelist::~BlockFreelist() { |
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744 if (_dictionary != NULL) { |
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745 if (Verbose && TraceMetadataChunkAllocation) { |
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746 _dictionary->print_free_lists(gclog_or_tty); |
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747 } |
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748 delete _dictionary; |
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749 } |
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750 } |
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751 |
6885 | 752 Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
753 Metablock* block = (Metablock*) p; | |
754 block->set_word_size(word_size); | |
755 block->set_prev(NULL); | |
756 block->set_next(NULL); | |
757 | |
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758 return block; |
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759 } |
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760 |
6885 | 761 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
762 Metablock* free_chunk = initialize_free_chunk(p, word_size); | |
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763 if (dictionary() == NULL) { |
6885 | 764 _dictionary = new BlockTreeDictionary(); |
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765 } |
6885 | 766 dictionary()->return_chunk(free_chunk); |
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767 } |
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768 |
6885 | 769 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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770 if (dictionary() == NULL) { |
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771 return NULL; |
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772 } |
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773 |
6885 | 774 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
775 // Dark matter. Too small for dictionary. | |
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776 return NULL; |
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777 } |
6885 | 778 |
779 Metablock* free_block = | |
780 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::exactly); | |
781 if (free_block == NULL) { | |
782 return NULL; | |
783 } | |
784 | |
785 return (MetaWord*) free_block; | |
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786 } |
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787 |
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788 void BlockFreelist::print_on(outputStream* st) const { |
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789 if (dictionary() == NULL) { |
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790 return; |
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791 } |
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792 dictionary()->print_free_lists(st); |
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793 } |
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794 |
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795 // VirtualSpaceNode methods |
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796 |
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797 VirtualSpaceNode::~VirtualSpaceNode() { |
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798 _rs.release(); |
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799 } |
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800 |
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801 size_t VirtualSpaceNode::used_words_in_vs() const { |
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802 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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803 } |
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804 |
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805 // Space committed in the VirtualSpace |
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806 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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807 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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808 } |
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809 |
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810 |
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811 // Allocates the chunk from the virtual space only. |
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812 // This interface is also used internally for debugging. Not all |
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813 // chunks removed here are necessarily used for allocation. |
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814 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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815 // Bottom of the new chunk |
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816 MetaWord* chunk_limit = top(); |
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817 assert(chunk_limit != NULL, "Not safe to call this method"); |
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818 |
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819 if (!is_available(chunk_word_size)) { |
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820 if (TraceMetadataChunkAllocation) { |
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821 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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822 // Dump some information about the virtual space that is nearly full |
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823 print_on(tty); |
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824 } |
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825 return NULL; |
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826 } |
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827 |
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828 // Take the space (bump top on the current virtual space). |
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829 inc_top(chunk_word_size); |
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830 |
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831 // Point the chunk at the space |
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832 Metachunk* result = Metachunk::initialize(chunk_limit, chunk_word_size); |
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833 return result; |
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834 } |
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835 |
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836 |
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837 // Expand the virtual space (commit more of the reserved space) |
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838 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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839 size_t bytes = words * BytesPerWord; |
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840 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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841 if (TraceMetavirtualspaceAllocation && !result) { |
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842 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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843 "for byte size " SIZE_FORMAT, bytes); |
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844 virtual_space()->print(); |
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845 } |
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846 return result; |
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847 } |
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848 |
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849 // Shrink the virtual space (commit more of the reserved space) |
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850 bool VirtualSpaceNode::shrink_by(size_t words) { |
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851 size_t bytes = words * BytesPerWord; |
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852 virtual_space()->shrink_by(bytes); |
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853 return true; |
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854 } |
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855 |
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856 // Add another chunk to the chunk list. |
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857 |
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858 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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859 assert_lock_strong(SpaceManager::expand_lock()); |
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860 Metachunk* result = NULL; |
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861 |
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862 return take_from_committed(chunk_word_size); |
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863 } |
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864 |
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865 Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
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866 assert_lock_strong(SpaceManager::expand_lock()); |
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867 |
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868 Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
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869 |
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870 if (new_chunk == NULL) { |
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871 // Only a small part of the virtualspace is committed when first |
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872 // allocated so committing more here can be expected. |
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873 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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874 size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
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875 page_size_words); |
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876 expand_by(aligned_expand_vs_by_words, false); |
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877 new_chunk = get_chunk_vs(chunk_word_size); |
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878 } |
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879 return new_chunk; |
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880 } |
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881 |
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882 bool VirtualSpaceNode::initialize() { |
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883 |
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884 if (!_rs.is_reserved()) { |
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885 return false; |
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886 } |
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887 |
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888 // Commit only 1 page instead of the whole reserved space _rs.size() |
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889 size_t committed_byte_size = os::vm_page_size(); |
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890 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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891 if (result) { |
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892 set_top((MetaWord*)virtual_space()->low()); |
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893 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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894 (HeapWord*)(_rs.base() + _rs.size()))); |
6726
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895 |
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896 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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897 err_msg("Reserved start was not set properly " PTR_FORMAT |
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898 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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899 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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900 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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901 " != " SIZE_FORMAT, reserved()->word_size(), |
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902 _rs.size() / BytesPerWord)); |
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903 } |
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904 |
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905 return result; |
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906 } |
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907 |
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908 void VirtualSpaceNode::print_on(outputStream* st) const { |
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909 size_t used = used_words_in_vs(); |
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910 size_t capacity = capacity_words_in_vs(); |
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911 VirtualSpace* vs = virtual_space(); |
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912 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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913 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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914 PTR_FORMAT ", " PTR_FORMAT ")", |
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915 vs, capacity / K, used * 100 / capacity, |
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916 bottom(), top(), end(), |
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917 vs->high_boundary()); |
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918 } |
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919 |
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920 void VirtualSpaceNode::mangle() { |
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921 size_t word_size = capacity_words_in_vs(); |
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922 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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923 } |
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924 |
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925 // VirtualSpaceList methods |
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926 // Space allocated from the VirtualSpace |
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|
927 |
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928 VirtualSpaceList::~VirtualSpaceList() { |
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929 VirtualSpaceListIterator iter(virtual_space_list()); |
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930 while (iter.repeat()) { |
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931 VirtualSpaceNode* vsl = iter.get_next(); |
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932 delete vsl; |
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933 } |
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934 } |
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935 |
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936 size_t VirtualSpaceList::used_words_sum() { |
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937 size_t allocated_by_vs = 0; |
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938 VirtualSpaceListIterator iter(virtual_space_list()); |
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939 while (iter.repeat()) { |
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940 VirtualSpaceNode* vsl = iter.get_next(); |
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941 // Sum used region [bottom, top) in each virtualspace |
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942 allocated_by_vs += vsl->used_words_in_vs(); |
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943 } |
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944 assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
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945 err_msg("Total in free chunks " SIZE_FORMAT |
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946 " greater than total from virtual_spaces " SIZE_FORMAT, |
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947 allocated_by_vs, chunk_manager()->free_chunks_total())); |
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|
948 size_t used = |
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949 allocated_by_vs - chunk_manager()->free_chunks_total(); |
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950 return used; |
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|
951 } |
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|
952 |
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953 // Space available in all MetadataVirtualspaces allocated |
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|
954 // for metadata. This is the upper limit on the capacity |
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955 // of chunks allocated out of all the MetadataVirtualspaces. |
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|
956 size_t VirtualSpaceList::capacity_words_sum() { |
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957 size_t capacity = 0; |
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958 VirtualSpaceListIterator iter(virtual_space_list()); |
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959 while (iter.repeat()) { |
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960 VirtualSpaceNode* vsl = iter.get_next(); |
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961 capacity += vsl->capacity_words_in_vs(); |
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|
962 } |
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|
963 return capacity; |
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|
964 } |
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|
965 |
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|
966 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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967 _is_class(false), |
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|
968 _virtual_space_list(NULL), |
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|
969 _current_virtual_space(NULL), |
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|
970 _virtual_space_total(0), |
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|
971 _virtual_space_count(0) { |
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|
972 MutexLockerEx cl(SpaceManager::expand_lock(), |
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973 Mutex::_no_safepoint_check_flag); |
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974 bool initialization_succeeded = grow_vs(word_size); |
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975 |
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976 assert(initialization_succeeded, |
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977 " VirtualSpaceList initialization should not fail"); |
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978 } |
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|
979 |
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980 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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981 _is_class(true), |
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982 _virtual_space_list(NULL), |
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983 _current_virtual_space(NULL), |
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984 _virtual_space_total(0), |
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985 _virtual_space_count(0) { |
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986 MutexLockerEx cl(SpaceManager::expand_lock(), |
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987 Mutex::_no_safepoint_check_flag); |
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988 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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989 bool succeeded = class_entry->initialize(); |
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990 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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991 link_vs(class_entry, rs.size()/BytesPerWord); |
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992 } |
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|
993 |
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994 // Allocate another meta virtual space and add it to the list. |
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995 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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996 assert_lock_strong(SpaceManager::expand_lock()); |
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997 if (vs_word_size == 0) { |
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998 return false; |
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|
999 } |
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1000 // Reserve the space |
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1001 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1002 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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|
1003 |
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|
1004 // Allocate the meta virtual space and initialize it. |
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1005 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1006 if (!new_entry->initialize()) { |
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1007 delete new_entry; |
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1008 return false; |
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1009 } else { |
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1010 link_vs(new_entry, vs_word_size); |
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1011 return true; |
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1012 } |
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1013 } |
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1014 |
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1015 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
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1016 if (virtual_space_list() == NULL) { |
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1017 set_virtual_space_list(new_entry); |
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1018 } else { |
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1019 current_virtual_space()->set_next(new_entry); |
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1020 } |
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1021 set_current_virtual_space(new_entry); |
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1022 inc_virtual_space_total(vs_word_size); |
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1023 inc_virtual_space_count(); |
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1024 #ifdef ASSERT |
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1025 new_entry->mangle(); |
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1026 #endif |
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1027 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1028 VirtualSpaceNode* vsl = current_virtual_space(); |
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1029 vsl->print_on(tty); |
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1030 } |
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1031 } |
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1032 |
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1033 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1034 size_t grow_chunks_by_words) { |
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1035 |
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1036 // Get a chunk from the chunk freelist |
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1037 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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1038 |
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1039 // Allocate a chunk out of the current virtual space. |
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1040 if (next == NULL) { |
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1041 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1042 } |
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1043 |
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1044 if (next == NULL) { |
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1045 // Not enough room in current virtual space. Try to commit |
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1046 // more space. |
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1047 size_t expand_vs_by_words = MAX2((size_t)SpaceManager::MediumChunkBunch, |
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1048 grow_chunks_by_words); |
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1049 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1050 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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1051 page_size_words); |
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1052 bool vs_expanded = |
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1053 current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
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1054 if (!vs_expanded) { |
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1055 // Should the capacity of the metaspaces be expanded for |
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1056 // this allocation? If it's the virtual space for classes and is |
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1057 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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1058 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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1059 // Get another virtual space. |
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1060 size_t grow_vs_words = |
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1061 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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1062 if (grow_vs(grow_vs_words)) { |
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1063 // Got it. It's on the list now. Get a chunk from it. |
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1064 next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
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1065 } |
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1066 if (TraceMetadataHumongousAllocation && SpaceManager::is_humongous(word_size)) { |
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1067 gclog_or_tty->print_cr(" aligned_expand_vs_by_words " PTR_FORMAT, |
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1068 aligned_expand_vs_by_words); |
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1069 gclog_or_tty->print_cr(" grow_vs_words " PTR_FORMAT, |
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1070 grow_vs_words); |
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1071 } |
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1072 } else { |
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1073 // Allocation will fail and induce a GC |
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1074 if (TraceMetadataChunkAllocation && Verbose) { |
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1075 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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1076 " Fail instead of expand the metaspace"); |
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1077 } |
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1078 } |
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1079 } else { |
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1080 // The virtual space expanded, get a new chunk |
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1081 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1082 assert(next != NULL, "Just expanded, should succeed"); |
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1083 } |
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1084 } |
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1085 |
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1086 return next; |
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1087 } |
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1088 |
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1089 void VirtualSpaceList::print_on(outputStream* st) const { |
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1090 if (TraceMetadataChunkAllocation && Verbose) { |
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1091 VirtualSpaceListIterator iter(virtual_space_list()); |
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1092 while (iter.repeat()) { |
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1093 VirtualSpaceNode* node = iter.get_next(); |
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1094 node->print_on(st); |
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1095 } |
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1096 } |
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1097 } |
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1098 |
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1099 #ifndef PRODUCT |
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1100 bool VirtualSpaceList::contains(const void *ptr) { |
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1101 VirtualSpaceNode* list = virtual_space_list(); |
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1102 VirtualSpaceListIterator iter(list); |
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1103 while (iter.repeat()) { |
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1104 VirtualSpaceNode* node = iter.get_next(); |
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1105 if (node->reserved()->contains(ptr)) { |
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1106 return true; |
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1107 } |
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1108 } |
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1109 return false; |
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1110 } |
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1111 #endif // PRODUCT |
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1112 |
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1113 |
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1114 // MetaspaceGC methods |
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1115 |
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1116 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1117 // Within the VM operation after the GC the attempt to allocate the metadata |
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1118 // should succeed. If the GC did not free enough space for the metaspace |
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1119 // allocation, the HWM is increased so that another virtualspace will be |
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1120 // allocated for the metadata. With perm gen the increase in the perm |
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1121 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1122 // metaspace policy uses those as the small and large steps for the HWM. |
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1123 // |
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1124 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1125 // resize the capacity of the metaspaces. The current implementation |
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1126 // is based on the flags MinHeapFreeRatio and MaxHeapFreeRatio used |
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1127 // to resize the Java heap by some GC's. New flags can be implemented |
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1128 // if really needed. MinHeapFreeRatio is used to calculate how much |
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1129 // free space is desirable in the metaspace capacity to decide how much |
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1130 // to increase the HWM. MaxHeapFreeRatio is used to decide how much |
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1131 // free space is desirable in the metaspace capacity before decreasing |
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1132 // the HWM. |
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1133 |
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1134 // Calculate the amount to increase the high water mark (HWM). |
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1135 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1136 // another expansion is not requested too soon. If that is not |
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1137 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1138 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1139 // not enough, expand by the size of the allocation (word_size) plus |
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1140 // some. |
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1141 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1142 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1143 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1144 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1145 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1146 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1147 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1148 if (delta_words > min_delta_words) { |
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1149 // Don't want to hit the high water mark on the next |
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1150 // allocation so make the delta greater than just enough |
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1151 // for this allocation. |
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1152 delta_words = MAX2(delta_words, max_delta_words); |
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1153 if (delta_words > max_delta_words) { |
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1154 // This allocation is large but the next ones are probably not |
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1155 // so increase by the minimum. |
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1156 delta_words = delta_words + min_delta_words; |
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1157 } |
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1158 } |
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1159 return delta_words; |
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1160 } |
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1161 |
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1162 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
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1163 |
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1164 // Class virtual space should always be expanded. Call GC for the other |
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1165 // metadata virtual space. |
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1166 if (vsl == Metaspace::class_space_list()) return true; |
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1167 |
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1168 // If the user wants a limit, impose one. |
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1169 size_t max_metaspace_size_words = MaxMetaspaceSize / BytesPerWord; |
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1170 size_t metaspace_size_words = MetaspaceSize / BytesPerWord; |
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1171 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize) && |
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1172 vsl->capacity_words_sum() >= max_metaspace_size_words) { |
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1173 return false; |
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1174 } |
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1175 |
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1176 // If this is part of an allocation after a GC, expand |
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1177 // unconditionally. |
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1178 if(MetaspaceGC::expand_after_GC()) { |
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1179 return true; |
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1180 } |
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1181 |
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1182 // If the capacity is below the minimum capacity, allow the |
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1183 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1184 // to that minimum capacity so that a GC will not be induced |
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1185 // until that minimum capacity is exceeded. |
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1186 if (vsl->capacity_words_sum() < metaspace_size_words || |
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1187 capacity_until_GC() == 0) { |
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1188 set_capacity_until_GC(metaspace_size_words); |
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1189 return true; |
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1190 } else { |
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1191 if (vsl->capacity_words_sum() < capacity_until_GC()) { |
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1192 return true; |
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1193 } else { |
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1194 if (TraceMetadataChunkAllocation && Verbose) { |
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1195 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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1196 " capacity_until_GC " SIZE_FORMAT |
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1197 " capacity_words_sum " SIZE_FORMAT |
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1198 " used_words_sum " SIZE_FORMAT |
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1199 " free chunks " SIZE_FORMAT |
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1200 " free chunks count %d", |
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1201 word_size, |
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1202 capacity_until_GC(), |
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1203 vsl->capacity_words_sum(), |
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1204 vsl->used_words_sum(), |
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1205 vsl->chunk_manager()->free_chunks_total(), |
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1206 vsl->chunk_manager()->free_chunks_count()); |
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1207 } |
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1208 return false; |
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1209 } |
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1210 } |
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1211 } |
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1212 |
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1213 // Variables are in bytes |
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1214 |
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1215 void MetaspaceGC::compute_new_size() { |
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1216 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1217 uint current_shrink_factor = _shrink_factor; |
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1218 _shrink_factor = 0; |
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1219 |
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1220 VirtualSpaceList *vsl = Metaspace::space_list(); |
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1221 |
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1222 size_t capacity_after_gc = vsl->capacity_bytes_sum(); |
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1223 // Check to see if these two can be calculated without walking the CLDG |
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1224 size_t used_after_gc = vsl->used_bytes_sum(); |
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1225 size_t capacity_until_GC = vsl->capacity_bytes_sum(); |
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1226 size_t free_after_gc = capacity_until_GC - used_after_gc; |
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1227 |
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1228 const double minimum_free_percentage = MinHeapFreeRatio / 100.0; |
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1229 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1230 |
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1231 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1232 size_t minimum_desired_capacity = |
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1233 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1234 // Don't shrink less than the initial generation size |
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1235 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1236 MetaspaceSize); |
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1237 |
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1238 if (PrintGCDetails && Verbose) { |
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1239 const double free_percentage = ((double)free_after_gc) / capacity_until_GC; |
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1240 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1241 gclog_or_tty->print_cr(" " |
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1242 " minimum_free_percentage: %6.2f" |
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1243 " maximum_used_percentage: %6.2f", |
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1244 minimum_free_percentage, |
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1245 maximum_used_percentage); |
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1246 double d_free_after_gc = free_after_gc / (double) K; |
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1247 gclog_or_tty->print_cr(" " |
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1248 " free_after_gc : %6.1fK" |
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1249 " used_after_gc : %6.1fK" |
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1250 " capacity_after_gc : %6.1fK" |
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1251 " metaspace HWM : %6.1fK", |
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1252 free_after_gc / (double) K, |
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1253 used_after_gc / (double) K, |
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1254 capacity_after_gc / (double) K, |
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1255 capacity_until_GC / (double) K); |
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1256 gclog_or_tty->print_cr(" " |
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1257 " free_percentage: %6.2f", |
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1258 free_percentage); |
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1259 } |
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1260 |
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1261 |
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1262 if (capacity_until_GC < minimum_desired_capacity) { |
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1263 // If we have less capacity below the metaspace HWM, then |
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1264 // increment the HWM. |
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1265 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1266 // Don't expand unless it's significant |
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1267 if (expand_bytes >= MinMetaspaceExpansion) { |
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1268 size_t expand_words = expand_bytes / BytesPerWord; |
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1269 MetaspaceGC::inc_capacity_until_GC(expand_words); |
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1270 } |
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1271 if (PrintGCDetails && Verbose) { |
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1272 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
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1273 gclog_or_tty->print_cr(" expanding:" |
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1274 " minimum_desired_capacity: %6.1fK" |
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1275 " expand_words: %6.1fK" |
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1276 " MinMetaspaceExpansion: %6.1fK" |
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1277 " new metaspace HWM: %6.1fK", |
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1278 minimum_desired_capacity / (double) K, |
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1279 expand_bytes / (double) K, |
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1280 MinMetaspaceExpansion / (double) K, |
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1281 new_capacity_until_GC / (double) K); |
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1282 } |
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1283 return; |
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1284 } |
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1285 |
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1286 // No expansion, now see if we want to shrink |
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1287 size_t shrink_words = 0; |
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1288 // We would never want to shrink more than this |
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1289 size_t max_shrink_words = capacity_until_GC - minimum_desired_capacity; |
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1290 assert(max_shrink_words >= 0, err_msg("max_shrink_words " SIZE_FORMAT, |
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1291 max_shrink_words)); |
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1292 |
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1293 // Should shrinking be considered? |
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1294 if (MaxHeapFreeRatio < 100) { |
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1295 const double maximum_free_percentage = MaxHeapFreeRatio / 100.0; |
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1296 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1297 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1298 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1299 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1300 MetaspaceSize); |
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1301 if (PrintGC && Verbose) { |
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1302 gclog_or_tty->print_cr(" " |
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1303 " maximum_free_percentage: %6.2f" |
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1304 " minimum_used_percentage: %6.2f", |
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1305 maximum_free_percentage, |
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1306 minimum_used_percentage); |
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1307 gclog_or_tty->print_cr(" " |
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1308 " capacity_until_GC: %6.1fK" |
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1309 " minimum_desired_capacity: %6.1fK" |
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1310 " maximum_desired_capacity: %6.1fK", |
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1311 capacity_until_GC / (double) K, |
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1312 minimum_desired_capacity / (double) K, |
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1313 maximum_desired_capacity / (double) K); |
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1314 } |
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1315 |
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1316 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1317 "sanity check"); |
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1318 |
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1319 if (capacity_until_GC > maximum_desired_capacity) { |
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1320 // Capacity too large, compute shrinking size |
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1321 shrink_words = capacity_until_GC - maximum_desired_capacity; |
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1322 // We don't want shrink all the way back to initSize if people call |
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1323 // System.gc(), because some programs do that between "phases" and then |
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1324 // we'd just have to grow the heap up again for the next phase. So we |
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1325 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1326 // on the third call, and 100% by the fourth call. But if we recompute |
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1327 // size without shrinking, it goes back to 0%. |
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1328 shrink_words = shrink_words / 100 * current_shrink_factor; |
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1329 assert(shrink_words <= max_shrink_words, |
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1330 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1331 shrink_words, max_shrink_words)); |
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1332 if (current_shrink_factor == 0) { |
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1333 _shrink_factor = 10; |
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1334 } else { |
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1335 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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1336 } |
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1337 if (PrintGCDetails && Verbose) { |
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1338 gclog_or_tty->print_cr(" " |
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1339 " shrinking:" |
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1340 " initSize: %.1fK" |
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1341 " maximum_desired_capacity: %.1fK", |
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1342 MetaspaceSize / (double) K, |
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1343 maximum_desired_capacity / (double) K); |
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1344 gclog_or_tty->print_cr(" " |
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1345 " shrink_words: %.1fK" |
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1346 " current_shrink_factor: %d" |
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1347 " new shrink factor: %d" |
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1348 " MinMetaspaceExpansion: %.1fK", |
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1349 shrink_words / (double) K, |
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1350 current_shrink_factor, |
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1351 _shrink_factor, |
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1352 MinMetaspaceExpansion / (double) K); |
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1353 } |
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1354 } |
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1355 } |
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1356 |
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1357 |
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1358 // Don't shrink unless it's significant |
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1359 if (shrink_words >= MinMetaspaceExpansion) { |
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1360 VirtualSpaceNode* csp = vsl->current_virtual_space(); |
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1361 size_t available_to_shrink = csp->capacity_words_in_vs() - |
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1362 csp->used_words_in_vs(); |
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1363 shrink_words = MIN2(shrink_words, available_to_shrink); |
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1364 csp->shrink_by(shrink_words); |
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1365 MetaspaceGC::dec_capacity_until_GC(shrink_words); |
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1366 if (PrintGCDetails && Verbose) { |
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1367 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
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1368 gclog_or_tty->print_cr(" metaspace HWM: %.1fK", new_capacity_until_GC / (double) K); |
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1369 } |
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1370 } |
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1371 assert(vsl->used_bytes_sum() == used_after_gc && |
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1372 used_after_gc <= vsl->capacity_bytes_sum(), |
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1373 "sanity check"); |
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1374 |
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1375 } |
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1376 |
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1377 // Metadebug methods |
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1378 |
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1379 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
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1380 size_t chunk_word_size){ |
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1381 #ifdef ASSERT |
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1382 VirtualSpaceList* vsl = sm->vs_list(); |
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1383 if (MetaDataDeallocateALot && |
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1384 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
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1385 Metadebug::reset_deallocate_chunk_a_lot_count(); |
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1386 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
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1387 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
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1388 if (dummy_chunk == NULL) { |
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1389 break; |
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1390 } |
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1391 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
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1392 |
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1393 if (TraceMetadataChunkAllocation && Verbose) { |
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1394 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
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1395 sm->sum_count_in_chunks_in_use()); |
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1396 dummy_chunk->print_on(gclog_or_tty); |
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1397 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
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1398 vsl->chunk_manager()->free_chunks_total(), |
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1399 vsl->chunk_manager()->free_chunks_count()); |
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1400 } |
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parents:
diff
changeset
|
1401 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1402 } else { |
da91efe96a93
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diff
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|
1403 Metadebug::inc_deallocate_chunk_a_lot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1404 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1405 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1406 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1407 |
da91efe96a93
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coleenp
parents:
diff
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|
1408 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1409 size_t raw_word_size){ |
da91efe96a93
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parents:
diff
changeset
|
1410 #ifdef ASSERT |
da91efe96a93
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coleenp
parents:
diff
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|
1411 if (MetaDataDeallocateALot && |
da91efe96a93
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diff
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|
1412 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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parents:
diff
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|
1413 Metadebug::set_deallocate_block_a_lot_count(0); |
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parents:
diff
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|
1414 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1415 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
da91efe96a93
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parents:
diff
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|
1416 if (dummy_block == 0) { |
da91efe96a93
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coleenp
parents:
diff
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|
1417 break; |
da91efe96a93
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parents:
diff
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|
1418 } |
6885 | 1419 sm->deallocate(dummy_block, raw_word_size); |
6725
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parents:
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|
1420 } |
da91efe96a93
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coleenp
parents:
diff
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|
1421 } else { |
da91efe96a93
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parents:
diff
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|
1422 Metadebug::inc_deallocate_block_a_lot_count(); |
da91efe96a93
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coleenp
parents:
diff
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|
1423 } |
da91efe96a93
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coleenp
parents:
diff
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|
1424 #endif |
da91efe96a93
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coleenp
parents:
diff
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|
1425 } |
da91efe96a93
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parents:
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|
1426 |
da91efe96a93
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parents:
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|
1427 void Metadebug::init_allocation_fail_alot_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
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|
1428 if (MetadataAllocationFailALot) { |
da91efe96a93
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parents:
diff
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|
1429 _allocation_fail_alot_count = |
da91efe96a93
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parents:
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|
1430 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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|
1431 } |
da91efe96a93
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coleenp
parents:
diff
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|
1432 } |
da91efe96a93
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coleenp
parents:
diff
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|
1433 |
da91efe96a93
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parents:
diff
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|
1434 #ifdef ASSERT |
da91efe96a93
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parents:
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|
1435 bool Metadebug::test_metadata_failure() { |
da91efe96a93
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parents:
diff
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|
1436 if (MetadataAllocationFailALot && |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1437 Threads::is_vm_complete()) { |
da91efe96a93
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coleenp
parents:
diff
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|
1438 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
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coleenp
parents:
diff
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|
1439 _allocation_fail_alot_count--; |
da91efe96a93
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coleenp
parents:
diff
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|
1440 } else { |
da91efe96a93
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parents:
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|
1441 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
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parents:
diff
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|
1442 gclog_or_tty->print_cr("Metadata allocation failing for " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1443 "MetadataAllocationFailALot"); |
da91efe96a93
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coleenp
parents:
diff
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|
1444 } |
da91efe96a93
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coleenp
parents:
diff
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|
1445 init_allocation_fail_alot_count(); |
da91efe96a93
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parents:
diff
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|
1446 return true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1447 } |
da91efe96a93
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coleenp
parents:
diff
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|
1448 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1449 return false; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1450 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1451 #endif |
da91efe96a93
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parents:
diff
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|
1452 |
da91efe96a93
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parents:
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|
1453 // ChunkList methods |
da91efe96a93
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diff
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|
1454 |
da91efe96a93
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|
1455 size_t ChunkList::sum_list_size() { |
da91efe96a93
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diff
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|
1456 size_t result = 0; |
da91efe96a93
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parents:
diff
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|
1457 Metachunk* cur = head(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1458 while (cur != NULL) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1459 result += cur->word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1460 cur = cur->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1461 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1462 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1463 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1464 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1465 size_t ChunkList::sum_list_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1466 size_t result = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1467 Metachunk* cur = head(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1468 while (cur != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1469 result++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1470 cur = cur->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1471 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1472 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1473 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1474 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1475 size_t ChunkList::sum_list_capacity() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1476 size_t result = 0; |
da91efe96a93
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coleenp
parents:
diff
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|
1477 Metachunk* cur = head(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1478 while (cur != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1479 result += cur->capacity_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1480 cur = cur->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1481 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1482 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1483 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1484 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1485 void ChunkList::add_at_head(Metachunk* head, Metachunk* tail) { |
da91efe96a93
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coleenp
parents:
diff
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|
1486 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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coleenp
parents:
diff
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|
1487 assert(tail->next() == NULL, "Not the tail"); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1488 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1489 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1490 tty->print("ChunkList::add_at_head: "); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1491 Metachunk* cur = head; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1492 while (cur != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1493 tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", cur, cur->word_size()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1494 cur = cur->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1495 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1496 tty->print_cr(""); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1497 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1498 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1499 if (tail != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1500 tail->set_next(_head); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1501 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1502 set_head(head); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1503 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1504 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1505 void ChunkList::add_at_head(Metachunk* list) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1506 if (list == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1507 // Nothing to add |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1508 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1509 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1510 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1511 Metachunk* head = list; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1512 Metachunk* tail = list; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1513 Metachunk* cur = head->next(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1514 // Search for the tail since it is not passed. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1515 while (cur != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1516 tail = cur; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1517 cur = cur->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1518 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1519 add_at_head(head, tail); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1520 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1521 |
da91efe96a93
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diff
changeset
|
1522 // ChunkManager methods |
da91efe96a93
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diff
changeset
|
1523 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
1524 // Verification of _free_chunks_total and _free_chunks_count does not |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1525 // work with the CMS collector because its use of additional locks |
da91efe96a93
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parents:
diff
changeset
|
1526 // complicate the mutex deadlock detection but it can still be useful |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1527 // for detecting errors in the chunk accounting with other collectors. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1528 |
da91efe96a93
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parents:
diff
changeset
|
1529 size_t ChunkManager::free_chunks_total() { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1530 #ifdef ASSERT |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1531 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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coleenp
parents:
diff
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|
1532 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
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diff
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|
1533 Mutex::_no_safepoint_check_flag); |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1534 slow_locked_verify_free_chunks_total(); |
6725
da91efe96a93
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parents:
diff
changeset
|
1535 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1536 #endif |
da91efe96a93
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parents:
diff
changeset
|
1537 return _free_chunks_total; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1538 } |
da91efe96a93
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diff
changeset
|
1539 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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1540 size_t ChunkManager::free_chunks_total_in_bytes() { |
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1541 return free_chunks_total() * BytesPerWord; |
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1542 } |
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1543 |
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1544 size_t ChunkManager::free_chunks_count() { |
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1545 #ifdef ASSERT |
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1546 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1547 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1548 Mutex::_no_safepoint_check_flag); |
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1549 // This lock is only needed in debug because the verification |
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1550 // of the _free_chunks_totals walks the list of free chunks |
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1551 slow_locked_verify_free_chunks_count(); |
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1552 } |
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1553 #endif |
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1554 return _free_chunks_count; |
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1555 } |
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1556 |
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1557 void ChunkManager::locked_verify_free_chunks_total() { |
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1558 assert_lock_strong(SpaceManager::expand_lock()); |
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1559 assert(sum_free_chunks() == _free_chunks_total, |
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1560 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
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1561 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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1562 sum_free_chunks())); |
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1563 } |
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1564 |
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1565 void ChunkManager::verify_free_chunks_total() { |
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1566 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1567 Mutex::_no_safepoint_check_flag); |
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1568 locked_verify_free_chunks_total(); |
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1569 } |
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1570 |
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1571 void ChunkManager::locked_verify_free_chunks_count() { |
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1572 assert_lock_strong(SpaceManager::expand_lock()); |
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1573 assert(sum_free_chunks_count() == _free_chunks_count, |
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1574 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1575 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1576 sum_free_chunks_count())); |
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1577 } |
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1578 |
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1579 void ChunkManager::verify_free_chunks_count() { |
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1580 #ifdef ASSERT |
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1581 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1582 Mutex::_no_safepoint_check_flag); |
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1583 locked_verify_free_chunks_count(); |
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1584 #endif |
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1585 } |
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1586 |
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1587 void ChunkManager::verify() { |
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1588 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1589 Mutex::_no_safepoint_check_flag); |
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1590 locked_verify(); |
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1591 } |
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1592 |
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1593 void ChunkManager::locked_verify() { |
6885 | 1594 locked_verify_free_chunks_count(); |
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1595 locked_verify_free_chunks_total(); |
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1596 } |
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1597 |
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1598 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1599 assert_lock_strong(SpaceManager::expand_lock()); |
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1600 st->print_cr("Free chunk total 0x%x count 0x%x", |
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1601 _free_chunks_total, _free_chunks_count); |
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1602 } |
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1603 |
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1604 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1605 assert_lock_strong(SpaceManager::expand_lock()); |
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1606 st->print_cr("Sum free chunk total 0x%x count 0x%x", |
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1607 sum_free_chunks(), sum_free_chunks_count()); |
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1608 } |
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1609 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1610 return &_free_chunks[index]; |
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1611 } |
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1612 |
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1613 // These methods that sum the free chunk lists are used in printing |
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1614 // methods that are used in product builds. |
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1615 size_t ChunkManager::sum_free_chunks() { |
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1616 assert_lock_strong(SpaceManager::expand_lock()); |
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1617 size_t result = 0; |
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1618 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1619 ChunkList* list = free_chunks(i); |
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1620 |
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1621 if (list == NULL) { |
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1622 continue; |
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1623 } |
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1624 |
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1625 result = result + list->sum_list_capacity(); |
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1626 } |
6885 | 1627 result = result + humongous_dictionary()->total_size(); |
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1628 return result; |
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1629 } |
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1630 |
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1631 size_t ChunkManager::sum_free_chunks_count() { |
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1632 assert_lock_strong(SpaceManager::expand_lock()); |
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1633 size_t count = 0; |
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1634 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1635 ChunkList* list = free_chunks(i); |
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1636 if (list == NULL) { |
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1637 continue; |
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1638 } |
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1639 count = count + list->sum_list_count(); |
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1640 } |
6885 | 1641 count = count + humongous_dictionary()->total_free_blocks(); |
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1642 return count; |
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1643 } |
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1644 |
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1645 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1646 switch (word_size) { |
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1647 case SpaceManager::SmallChunk : |
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1648 return &_free_chunks[0]; |
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1649 case SpaceManager::MediumChunk : |
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1650 return &_free_chunks[1]; |
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1651 default: |
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1652 assert(word_size > SpaceManager::MediumChunk, "List inconsistency"); |
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1653 return &_free_chunks[2]; |
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1654 } |
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1655 } |
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1656 |
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1657 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1658 assert_lock_strong(SpaceManager::expand_lock()); |
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1659 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1660 chunk->set_next(free_list->head()); |
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1661 free_list->set_head(chunk); |
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1662 // chunk is being returned to the chunk free list |
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1663 inc_free_chunks_total(chunk->capacity_word_size()); |
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1664 slow_locked_verify(); |
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1665 } |
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1666 |
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1667 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1668 // The deallocation of a chunk originates in the freelist |
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1669 // manangement code for a Metaspace and does not hold the |
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1670 // lock. |
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1671 assert(chunk != NULL, "Deallocating NULL"); |
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1672 assert_lock_strong(SpaceManager::expand_lock()); |
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1673 slow_locked_verify(); |
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1674 if (TraceMetadataChunkAllocation) { |
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1675 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1676 PTR_FORMAT " size " SIZE_FORMAT, |
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1677 chunk, chunk->word_size()); |
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1678 } |
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1679 free_chunks_put(chunk); |
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1680 } |
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1681 |
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1682 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1683 assert_lock_strong(SpaceManager::expand_lock()); |
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1684 |
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1685 slow_locked_verify(); |
6885 | 1686 |
1687 Metachunk* chunk = NULL; | |
1688 if (!SpaceManager::is_humongous(word_size)) { | |
1689 ChunkList* free_list = find_free_chunks_list(word_size); | |
1690 assert(free_list != NULL, "Sanity check"); | |
1691 | |
1692 chunk = free_list->head(); | |
1693 debug_only(Metachunk* debug_head = chunk;) | |
1694 | |
1695 if (chunk == NULL) { | |
1696 return NULL; | |
1697 } | |
1698 | |
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1699 // Remove the chunk as the head of the list. |
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1700 free_list->set_head(chunk->next()); |
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1701 chunk->set_next(NULL); |
6885 | 1702 // Chunk has been removed from the chunks free list. |
1703 dec_free_chunks_total(chunk->capacity_word_size()); | |
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1704 |
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1705 if (TraceMetadataChunkAllocation && Verbose) { |
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1706 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1707 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1708 free_list, chunk, chunk->word_size()); |
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1709 } |
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1710 } else { |
6885 | 1711 chunk = humongous_dictionary()->get_chunk( |
1712 word_size, | |
1713 FreeBlockDictionary<Metachunk>::atLeast); | |
1714 | |
1715 if (chunk != NULL) { | |
1716 if (TraceMetadataHumongousAllocation) { | |
1717 size_t waste = chunk->word_size() - word_size; | |
1718 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT | |
1719 " for requested size " SIZE_FORMAT | |
1720 " waste " SIZE_FORMAT, | |
1721 chunk->word_size(), word_size, waste); | |
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1722 } |
6885 | 1723 // Chunk is being removed from the chunks free list. |
1724 dec_free_chunks_total(chunk->capacity_word_size()); | |
1725 #ifdef ASSERT | |
1726 chunk->set_is_free(false); | |
1727 #endif | |
1728 } | |
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1729 } |
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1730 slow_locked_verify(); |
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1731 return chunk; |
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1732 } |
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1733 |
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1734 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1735 assert_lock_strong(SpaceManager::expand_lock()); |
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1736 slow_locked_verify(); |
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1737 |
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1738 // Take from the beginning of the list |
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1739 Metachunk* chunk = free_chunks_get(word_size); |
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1740 if (chunk == NULL) { |
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1741 return NULL; |
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1742 } |
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1743 |
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1744 assert(word_size <= chunk->word_size() || |
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1745 SpaceManager::is_humongous(chunk->word_size()), |
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1746 "Non-humongous variable sized chunk"); |
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1747 if (TraceMetadataChunkAllocation) { |
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1748 tty->print("ChunkManager::chunk_freelist_allocate: chunk " |
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1749 PTR_FORMAT " size " SIZE_FORMAT " ", |
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1750 chunk, chunk->word_size()); |
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1751 locked_print_free_chunks(tty); |
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1752 } |
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1753 |
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1754 return chunk; |
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1755 } |
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1756 |
6885 | 1757 void ChunkManager::print_on(outputStream* out) { |
1758 if (PrintFLSStatistics != 0) { | |
1759 humongous_dictionary()->report_statistics(); | |
1760 } | |
1761 } | |
1762 | |
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1763 // SpaceManager methods |
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1764 |
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1765 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1766 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1767 size_t free = 0; |
6885 | 1768 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1769 Metachunk* chunk = chunks_in_use(i); |
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1770 while (chunk != NULL) { |
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1771 free += chunk->free_word_size(); |
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1772 chunk = chunk->next(); |
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1773 } |
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1774 } |
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1775 return free; |
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1776 } |
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1777 |
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1778 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1779 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1780 size_t result = 0; |
6885 | 1781 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
1782 | |
1783 | |
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1784 result += sum_waste_in_chunks_in_use(i); |
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1785 } |
6885 | 1786 |
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1787 return result; |
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1788 } |
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1789 |
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1790 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1791 size_t result = 0; |
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1792 size_t count = 0; |
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1793 Metachunk* chunk = chunks_in_use(index); |
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1794 // Count the free space in all the chunk but not the |
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1795 // current chunk from which allocations are still being done. |
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1796 if (chunk != NULL) { |
6885 | 1797 Metachunk* prev = chunk; |
1798 while (chunk != NULL && chunk != current_chunk()) { | |
1799 result += chunk->free_word_size(); | |
1800 prev = chunk; | |
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1801 chunk = chunk->next(); |
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1802 count++; |
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1803 } |
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1804 } |
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1805 return result; |
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1806 } |
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1807 |
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1808 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1809 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1810 size_t sum = 0; |
6885 | 1811 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1812 Metachunk* chunk = chunks_in_use(i); |
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1813 while (chunk != NULL) { |
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1814 // Just changed this sum += chunk->capacity_word_size(); |
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1815 // sum += chunk->word_size() - Metachunk::overhead(); |
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1816 sum += chunk->capacity_word_size(); |
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1817 chunk = chunk->next(); |
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1818 } |
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1819 } |
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1820 return sum; |
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1821 } |
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1822 |
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1823 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1824 size_t count = 0; |
6885 | 1825 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1826 count = count + sum_count_in_chunks_in_use(i); |
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1827 } |
6885 | 1828 |
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1829 return count; |
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1830 } |
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1831 |
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1832 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1833 size_t count = 0; |
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1834 Metachunk* chunk = chunks_in_use(i); |
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1835 while (chunk != NULL) { |
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1836 count++; |
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1837 chunk = chunk->next(); |
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1838 } |
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1839 return count; |
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1840 } |
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1841 |
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1842 |
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1843 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1844 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1845 size_t used = 0; |
6885 | 1846 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1847 Metachunk* chunk = chunks_in_use(i); |
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1848 while (chunk != NULL) { |
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1849 used += chunk->used_word_size(); |
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1850 chunk = chunk->next(); |
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1851 } |
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1852 } |
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1853 return used; |
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1854 } |
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1855 |
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1856 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1857 |
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1858 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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1859 st->print_cr("SpaceManager: small chunk " PTR_FORMAT |
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1860 " free " SIZE_FORMAT, |
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1861 small_chunk, |
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1862 small_chunk->free_word_size()); |
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1863 |
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1864 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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1865 st->print("medium chunk " PTR_FORMAT, medium_chunk); |
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1866 Metachunk* tail = current_chunk(); |
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1867 st->print_cr(" current chunk " PTR_FORMAT, tail); |
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1868 |
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1869 Metachunk* head = chunks_in_use(HumongousIndex); |
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1870 st->print_cr("humongous chunk " PTR_FORMAT, head); |
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1871 |
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1872 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
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1873 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
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1874 } |
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1875 |
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1876 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1877 |
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1878 // Decide between a small chunk and a medium chunk. Up to |
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1879 // _small_chunk_limit small chunks can be allocated but |
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1880 // once a medium chunk has been allocated, no more small |
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1881 // chunks will be allocated. |
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1882 size_t chunk_word_size; |
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1883 if (chunks_in_use(MediumIndex) == NULL && |
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1884 (!has_small_chunk_limit() || |
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1885 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit)) { |
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1886 chunk_word_size = (size_t) SpaceManager::SmallChunk; |
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1887 if (word_size + Metachunk::overhead() > SpaceManager::SmallChunk) { |
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1888 chunk_word_size = MediumChunk; |
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1889 } |
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1890 } else { |
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1891 chunk_word_size = MediumChunk; |
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1892 } |
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1893 |
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1894 // Might still need a humongous chunk |
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1895 chunk_word_size = |
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1896 MAX2((size_t) chunk_word_size, word_size + Metachunk::overhead()); |
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1897 |
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1898 if (TraceMetadataHumongousAllocation && |
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1899 SpaceManager::is_humongous(word_size)) { |
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1900 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1901 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1902 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1903 chunk_word_size); |
6885 | 1904 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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1905 Metachunk::overhead()); |
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1906 } |
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1907 return chunk_word_size; |
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1908 } |
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1909 |
6885 | 1910 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1911 assert(vs_list()->current_virtual_space() != NULL, |
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1912 "Should have been set"); |
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1913 assert(current_chunk() == NULL || |
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1914 current_chunk()->allocate(word_size) == NULL, |
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1915 "Don't need to expand"); |
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1916 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1917 |
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1918 if (TraceMetadataChunkAllocation && Verbose) { |
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1919 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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1920 " words " SIZE_FORMAT " space left", |
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1921 word_size, current_chunk() != NULL ? |
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1922 current_chunk()->free_word_size() : 0); |
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1923 } |
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1924 |
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1925 // Get another chunk out of the virtual space |
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1926 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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1927 Metachunk* next = vs_list()->get_new_chunk(word_size, grow_chunks_by_words); |
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1928 |
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1929 // If a chunk was available, add it to the in-use chunk list |
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1930 // and do an allocation from it. |
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1931 if (next != NULL) { |
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1932 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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1933 // Add to this manager's list of chunks in use. |
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1934 add_chunk(next, false); |
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1935 return next->allocate(word_size); |
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1936 } |
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1937 return NULL; |
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1938 } |
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1939 |
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1940 void SpaceManager::print_on(outputStream* st) const { |
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1941 |
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1942 for (ChunkIndex i = SmallIndex; |
6885 | 1943 i < NumberOfInUseLists ; |
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1944 i = next_chunk_index(i) ) { |
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1945 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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1946 chunks_in_use(i), |
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1947 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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1948 } |
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1949 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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1950 " Humongous " SIZE_FORMAT, |
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1951 sum_waste_in_chunks_in_use(SmallIndex), |
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1952 sum_waste_in_chunks_in_use(MediumIndex), |
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1953 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 1954 // block free lists |
1955 if (block_freelists() != NULL) { | |
1956 st->print_cr("total in block free lists " SIZE_FORMAT, | |
1957 block_freelists()->total_size()); | |
1958 } | |
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1959 } |
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1960 |
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1961 SpaceManager::SpaceManager(Mutex* lock, VirtualSpaceList* vs_list) : |
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1962 _vs_list(vs_list), |
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1963 _allocation_total(0), |
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1964 _lock(lock) { |
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1965 Metadebug::init_allocation_fail_alot_count(); |
6885 | 1966 for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1967 _chunks_in_use[i] = NULL; |
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1968 } |
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1969 _current_chunk = NULL; |
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1970 if (TraceMetadataChunkAllocation && Verbose) { |
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1971 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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1972 } |
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1973 } |
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1974 |
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1975 SpaceManager::~SpaceManager() { |
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1976 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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1977 Mutex::_no_safepoint_check_flag); |
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1978 |
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1979 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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1980 |
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1981 chunk_manager->slow_locked_verify(); |
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1982 |
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1983 if (TraceMetadataChunkAllocation && Verbose) { |
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1984 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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1985 locked_print_chunks_in_use_on(gclog_or_tty); |
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1986 } |
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1987 |
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1988 // Have to update before the chunks_in_use lists are emptied |
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1989 // below. |
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1990 chunk_manager->inc_free_chunks_total(sum_capacity_in_chunks_in_use(), |
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1991 sum_count_in_chunks_in_use()); |
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1992 |
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1993 #ifdef ASSERT |
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1994 // Mangle freed memory. |
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1995 mangle_freed_chunks(); |
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1996 #endif // ASSERT |
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1997 |
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1998 // Add all the chunks in use by this space manager |
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1999 // to the global list of free chunks. |
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2000 |
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2001 // Small chunks. There is one _current_chunk for each |
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2002 // Metaspace. It could point to a small or medium chunk. |
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2003 // Rather than determine which it is, follow the list of |
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2004 // small chunks to add them to the free list |
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2005 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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2006 chunk_manager->free_small_chunks()->add_at_head(small_chunk); |
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2007 set_chunks_in_use(SmallIndex, NULL); |
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2008 |
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2009 // After the small chunk are the medium chunks |
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2010 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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2011 assert(medium_chunk == NULL || |
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2012 medium_chunk->word_size() == MediumChunk, |
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2013 "Chunk is on the wrong list"); |
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2014 |
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2015 if (medium_chunk != NULL) { |
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2016 Metachunk* head = medium_chunk; |
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2017 // If there is a medium chunk then the _current_chunk can only |
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2018 // point to the last medium chunk. |
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2019 Metachunk* tail = current_chunk(); |
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2020 chunk_manager->free_medium_chunks()->add_at_head(head, tail); |
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2021 set_chunks_in_use(MediumIndex, NULL); |
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2022 } |
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2023 |
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2024 // Humongous chunks |
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2025 // Humongous chunks are never the current chunk. |
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2026 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2027 |
6885 | 2028 while (humongous_chunks != NULL) { |
2029 #ifdef ASSERT | |
2030 humongous_chunks->set_is_free(true); | |
2031 #endif | |
2032 Metachunk* next_humongous_chunks = humongous_chunks->next(); | |
2033 chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); | |
2034 humongous_chunks = next_humongous_chunks; | |
6725
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2035 } |
6885 | 2036 set_chunks_in_use(HumongousIndex, NULL); |
6969
6bc207d87e5d
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|
2037 chunk_manager->slow_locked_verify(); |
6725
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2038 } |
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2039 |
6885 | 2040 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
6725
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2041 assert_lock_strong(_lock); |
6885 | 2042 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
2043 assert(word_size >= min_size, | |
2044 err_msg("Should not deallocate dark matter " SIZE_FORMAT, word_size)); | |
2045 block_freelists()->return_block(p, word_size); | |
6725
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2046 } |
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2047 |
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2048 // Adds a chunk to the list of chunks in use. |
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2049 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2050 |
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2051 assert(new_chunk != NULL, "Should not be NULL"); |
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2052 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2053 |
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2054 new_chunk->reset_empty(); |
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2055 |
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2056 // Find the correct list and and set the current |
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2057 // chunk for that list. |
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2058 switch (new_chunk->word_size()) { |
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2059 case SpaceManager::SmallChunk : |
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2060 if (chunks_in_use(SmallIndex) == NULL) { |
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2061 // First chunk to add to the list |
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2062 set_chunks_in_use(SmallIndex, new_chunk); |
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2063 } else { |
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2064 assert(current_chunk()->word_size() == SpaceManager::SmallChunk, |
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2065 err_msg( "Incorrect mix of sizes in chunk list " |
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2066 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
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2067 current_chunk()->word_size(), new_chunk->word_size())); |
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2068 current_chunk()->set_next(new_chunk); |
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|
2069 } |
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|
2070 // Make current chunk |
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|
2071 set_current_chunk(new_chunk); |
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|
2072 break; |
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|
2073 case SpaceManager::MediumChunk : |
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|
2074 if (chunks_in_use(MediumIndex) == NULL) { |
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2075 // About to add the first medium chunk so teminate the |
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|
2076 // small chunk list. In general once medium chunks are |
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2077 // being added, we're past the need for small chunks. |
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2078 if (current_chunk() != NULL) { |
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|
2079 // Only a small chunk or the initial chunk could be |
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|
2080 // the current chunk if this is the first medium chunk. |
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2081 assert(current_chunk()->word_size() == SpaceManager::SmallChunk || |
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2082 chunks_in_use(SmallIndex) == NULL, |
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2083 err_msg("Should be a small chunk or initial chunk, current chunk " |
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|
2084 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
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2085 current_chunk()->word_size(), new_chunk->word_size())); |
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|
2086 current_chunk()->set_next(NULL); |
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|
2087 } |
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|
2088 // First chunk to add to the list |
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2089 set_chunks_in_use(MediumIndex, new_chunk); |
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|
2090 |
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|
2091 } else { |
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|
2092 // As a minimum the first medium chunk added would |
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|
2093 // have become the _current_chunk |
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2094 // so the _current_chunk has to be non-NULL here |
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|
2095 // (although not necessarily still the first medium chunk). |
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|
2096 assert(current_chunk()->word_size() == SpaceManager::MediumChunk, |
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|
2097 "A medium chunk should the current chunk"); |
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2098 current_chunk()->set_next(new_chunk); |
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|
2099 } |
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|
2100 // Make current chunk |
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|
2101 set_current_chunk(new_chunk); |
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|
2102 break; |
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|
2103 default: { |
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|
2104 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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|
2105 // small, so small will be null. Link this first chunk as the current |
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|
2106 // chunk. |
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|
2107 if (make_current) { |
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|
2108 // Set as the current chunk but otherwise treat as a humongous chunk. |
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|
2109 set_current_chunk(new_chunk); |
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|
2110 } |
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|
2111 // Link at head. The _current_chunk only points to a humongous chunk for |
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|
2112 // the null class loader metaspace (class and data virtual space managers) |
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2113 // any humongous chunks so will not point to the tail |
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|
2114 // of the humongous chunks list. |
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2115 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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|
2116 set_chunks_in_use(HumongousIndex, new_chunk); |
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|
2117 |
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|
2118 assert(new_chunk->word_size() > MediumChunk, "List inconsistency"); |
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|
2119 } |
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|
2120 } |
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|
2121 |
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|
2122 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2123 if (TraceMetadataChunkAllocation && Verbose) { |
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2124 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2125 sum_count_in_chunks_in_use()); |
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2126 new_chunk->print_on(gclog_or_tty); |
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2127 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
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2128 } |
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2129 } |
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2130 |
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2131 MetaWord* SpaceManager::allocate(size_t word_size) { |
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2132 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2133 |
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2134 // If only the dictionary is going to be used (i.e., no |
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2135 // indexed free list), then there is a minimum size requirement. |
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2136 // MinChunkSize is a placeholder for the real minimum size JJJ |
6885 | 2137 size_t byte_size = word_size * BytesPerWord; |
2138 | |
2139 size_t byte_size_with_overhead = byte_size + Metablock::overhead(); | |
2140 | |
2141 size_t raw_bytes_size = MAX2(byte_size_with_overhead, | |
2142 Metablock::min_block_byte_size()); | |
2143 raw_bytes_size = ARENA_ALIGN(raw_bytes_size); | |
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2144 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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2145 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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2146 |
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2147 BlockFreelist* fl = block_freelists(); |
6885 | 2148 MetaWord* p = NULL; |
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2149 // Allocation from the dictionary is expensive in the sense that |
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2150 // the dictionary has to be searched for a size. Don't allocate |
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2151 // from the dictionary until it starts to get fat. Is this |
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2152 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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2153 // for allocations. Do some profiling. JJJ |
6885 | 2154 if (fl->total_size() > allocation_from_dictionary_limit) { |
2155 p = fl->get_block(raw_word_size); | |
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2156 } |
6885 | 2157 if (p == NULL) { |
2158 p = allocate_work(raw_word_size); | |
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2159 } |
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2160 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
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2161 |
6885 | 2162 return p; |
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2163 } |
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2164 |
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2165 // Returns the address of spaced allocated for "word_size". |
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2166 // This methods does not know about blocks (Metablocks) |
6885 | 2167 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
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2168 assert_lock_strong(_lock); |
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2169 #ifdef ASSERT |
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2170 if (Metadebug::test_metadata_failure()) { |
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2171 return NULL; |
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2172 } |
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2173 #endif |
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2174 // Is there space in the current chunk? |
6885 | 2175 MetaWord* result = NULL; |
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2176 |
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2177 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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2178 // never null because we gave it the size we wanted. Caller reports out |
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2179 // of memory if this returns null. |
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2180 if (DumpSharedSpaces) { |
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2181 assert(current_chunk() != NULL, "should never happen"); |
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2182 inc_allocation_total(word_size); |
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2183 return current_chunk()->allocate(word_size); // caller handles null result |
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2184 } |
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2185 if (current_chunk() != NULL) { |
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2186 result = current_chunk()->allocate(word_size); |
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2187 } |
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2188 |
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2189 if (result == NULL) { |
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2190 result = grow_and_allocate(word_size); |
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2191 } |
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2192 if (result > 0) { |
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2193 inc_allocation_total(word_size); |
6885 | 2194 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2195 "Head of the list is being allocated"); | |
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2196 } |
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2197 |
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2198 return result; |
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2199 } |
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2200 |
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2201 void SpaceManager::verify() { |
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2202 // If there are blocks in the dictionary, then |
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2203 // verfication of chunks does not work since |
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2204 // being in the dictionary alters a chunk. |
6885 | 2205 if (block_freelists()->total_size() == 0) { |
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2206 // Skip the small chunks because their next link points to |
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2207 // medium chunks. This is because the small chunk is the |
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2208 // current chunk (for allocations) until it is full and the |
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2209 // the addition of the next chunk does not NULL the next |
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2210 // like of the small chunk. |
6885 | 2211 for (ChunkIndex i = MediumIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2212 Metachunk* curr = chunks_in_use(i); |
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2213 while (curr != NULL) { |
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2214 curr->verify(); |
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2215 curr = curr->next(); |
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2216 } |
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2217 } |
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2218 } |
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2219 } |
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2220 |
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2221 #ifdef ASSERT |
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2222 void SpaceManager::verify_allocation_total() { |
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2223 #if 0 |
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2224 // Verification is only guaranteed at a safepoint. |
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2225 if (SafepointSynchronize::is_at_safepoint()) { |
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2226 gclog_or_tty->print_cr("Chunk " PTR_FORMAT " allocation_total " SIZE_FORMAT |
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2227 " sum_used_in_chunks_in_use " SIZE_FORMAT, |
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2228 this, |
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2229 allocation_total(), |
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2230 sum_used_in_chunks_in_use()); |
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2231 } |
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2232 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2233 assert(allocation_total() == sum_used_in_chunks_in_use(), |
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2234 err_msg("allocation total is not consistent %d vs %d", |
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2235 allocation_total(), sum_used_in_chunks_in_use())); |
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2236 #endif |
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2237 } |
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2238 |
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2239 #endif |
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2240 |
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2241 void SpaceManager::dump(outputStream* const out) const { |
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2242 size_t curr_total = 0; |
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2243 size_t waste = 0; |
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2244 uint i = 0; |
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2245 size_t used = 0; |
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2246 size_t capacity = 0; |
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2247 |
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2248 // Add up statistics for all chunks in this SpaceManager. |
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2249 for (ChunkIndex index = SmallIndex; |
6885 | 2250 index < NumberOfInUseLists; |
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2251 index = next_chunk_index(index)) { |
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2252 for (Metachunk* curr = chunks_in_use(index); |
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2253 curr != NULL; |
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2254 curr = curr->next()) { |
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2255 out->print("%d) ", i++); |
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2256 curr->print_on(out); |
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2257 if (TraceMetadataChunkAllocation && Verbose) { |
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2258 block_freelists()->print_on(out); |
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2259 } |
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2260 curr_total += curr->word_size(); |
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2261 used += curr->used_word_size(); |
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2262 capacity += curr->capacity_word_size(); |
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2263 waste += curr->free_word_size() + curr->overhead();; |
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2264 } |
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2265 } |
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2266 |
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2267 size_t free = current_chunk()->free_word_size(); |
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2268 // Free space isn't wasted. |
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2269 waste -= free; |
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2270 |
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2271 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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2272 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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2273 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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2274 } |
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2275 |
6786 | 2276 #ifdef ASSERT |
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2277 void SpaceManager::mangle_freed_chunks() { |
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2278 for (ChunkIndex index = SmallIndex; |
6885 | 2279 index < NumberOfInUseLists; |
6725
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2280 index = next_chunk_index(index)) { |
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2281 for (Metachunk* curr = chunks_in_use(index); |
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2282 curr != NULL; |
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2283 curr = curr->next()) { |
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2284 // Try to detect incorrectly terminated small chunk |
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2285 // list. |
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2286 assert(index == MediumIndex || curr != chunks_in_use(MediumIndex), |
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2287 err_msg("Mangling medium chunks in small chunks? " |
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2288 "curr " PTR_FORMAT " medium list " PTR_FORMAT, |
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2289 curr, chunks_in_use(MediumIndex))); |
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2290 curr->mangle(); |
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2291 } |
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2292 } |
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2293 } |
6786 | 2294 #endif // ASSERT |
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2295 |
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2296 |
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2297 // MetaspaceAux |
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2298 |
6734 | 2299 size_t MetaspaceAux::used_in_bytes(Metaspace::MetadataType mdtype) { |
6730
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2300 size_t used = 0; |
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2301 ClassLoaderDataGraphMetaspaceIterator iter; |
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2302 while (iter.repeat()) { |
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2303 Metaspace* msp = iter.get_next(); |
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2304 // Sum allocation_total for each metaspace |
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2305 if (msp != NULL) { |
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2306 used += msp->used_words(mdtype); |
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2307 } |
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2308 } |
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2309 return used * BytesPerWord; |
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2310 } |
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2311 |
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2312 size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
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2313 size_t free = 0; |
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2314 ClassLoaderDataGraphMetaspaceIterator iter; |
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2315 while (iter.repeat()) { |
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2316 Metaspace* msp = iter.get_next(); |
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2317 if (msp != NULL) { |
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2318 free += msp->free_words(mdtype); |
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2319 } |
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2320 } |
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2321 return free * BytesPerWord; |
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2322 } |
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2323 |
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2324 // The total words available for metadata allocation. This |
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2325 // uses Metaspace capacity_words() which is the total words |
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2326 // in chunks allocated for a Metaspace. |
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2327 size_t MetaspaceAux::capacity_in_bytes(Metaspace::MetadataType mdtype) { |
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2328 size_t capacity = free_chunks_total(mdtype); |
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2329 ClassLoaderDataGraphMetaspaceIterator iter; |
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2330 while (iter.repeat()) { |
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2331 Metaspace* msp = iter.get_next(); |
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2332 if (msp != NULL) { |
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2333 capacity += msp->capacity_words(mdtype); |
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2334 } |
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2335 } |
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2336 return capacity * BytesPerWord; |
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2337 } |
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2338 |
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2339 size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
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2340 size_t reserved = (mdtype == Metaspace::ClassType) ? |
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2341 Metaspace::class_space_list()->virtual_space_total() : |
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2342 Metaspace::space_list()->virtual_space_total(); |
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2343 return reserved * BytesPerWord; |
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2344 } |
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2345 |
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2346 size_t MetaspaceAux::min_chunk_size() { return SpaceManager::MediumChunk; } |
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2347 |
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2348 size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
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2349 ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
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2350 Metaspace::class_space_list()->chunk_manager() : |
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2351 Metaspace::space_list()->chunk_manager(); |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
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6885
diff
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|
2352 chunk->slow_verify(); |
6725
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|
2353 return chunk->free_chunks_total(); |
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2354 } |
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|
2355 |
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2356 size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
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2357 return free_chunks_total(mdtype) * BytesPerWord; |
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|
2358 } |
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|
2359 |
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2360 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
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2361 gclog_or_tty->print(", [Metaspace:"); |
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2362 if (PrintGCDetails && Verbose) { |
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|
2363 gclog_or_tty->print(" " SIZE_FORMAT |
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|
2364 "->" SIZE_FORMAT |
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2365 "(" SIZE_FORMAT "/" SIZE_FORMAT ")", |
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|
2366 prev_metadata_used, |
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|
2367 used_in_bytes(), |
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|
2368 capacity_in_bytes(), |
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|
2369 reserved_in_bytes()); |
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|
2370 } else { |
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|
2371 gclog_or_tty->print(" " SIZE_FORMAT "K" |
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|
2372 "->" SIZE_FORMAT "K" |
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|
2373 "(" SIZE_FORMAT "K/" SIZE_FORMAT "K)", |
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|
2374 prev_metadata_used / K, |
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|
2375 used_in_bytes()/ K, |
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|
2376 capacity_in_bytes()/K, |
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|
2377 reserved_in_bytes()/ K); |
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|
2378 } |
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|
2379 |
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|
2380 gclog_or_tty->print("]"); |
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|
2381 } |
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|
2382 |
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|
2383 // This is printed when PrintGCDetails |
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2384 void MetaspaceAux::print_on(outputStream* out) { |
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2385 Metaspace::MetadataType ct = Metaspace::ClassType; |
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|
2386 Metaspace::MetadataType nct = Metaspace::NonClassType; |
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|
2387 |
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|
2388 out->print_cr(" Metaspace total " |
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|
2389 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2390 " reserved " SIZE_FORMAT "K", |
6734 | 2391 capacity_in_bytes()/K, used_in_bytes()/K, reserved_in_bytes()/K); |
6725
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|
2392 out->print_cr(" data space " |
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|
2393 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2394 " reserved " SIZE_FORMAT "K", |
6734 | 2395 capacity_in_bytes(nct)/K, used_in_bytes(nct)/K, reserved_in_bytes(nct)/K); |
6725
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|
2396 out->print_cr(" class space " |
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|
2397 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2398 " reserved " SIZE_FORMAT "K", |
6734 | 2399 capacity_in_bytes(ct)/K, used_in_bytes(ct)/K, reserved_in_bytes(ct)/K); |
6725
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|
2400 } |
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|
2401 |
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|
2402 // Print information for class space and data space separately. |
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|
2403 // This is almost the same as above. |
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|
2404 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
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2405 size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
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2406 size_t capacity_bytes = capacity_in_bytes(mdtype); |
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parents:
diff
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|
2407 size_t used_bytes = used_in_bytes(mdtype); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2408 size_t free_bytes = free_in_bytes(mdtype); |
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diff
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|
2409 size_t used_and_free = used_bytes + free_bytes + |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2410 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2411 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2412 "K + unused in chunks " SIZE_FORMAT "K + " |
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diff
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|
2413 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
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parents:
diff
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|
2414 "K capacity in allocated chunks " SIZE_FORMAT "K", |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2415 used_bytes / K, |
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parents:
diff
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|
2416 free_bytes / K, |
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parents:
diff
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|
2417 free_chunks_capacity_bytes / K, |
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diff
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|
2418 used_and_free / K, |
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diff
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|
2419 capacity_bytes / K); |
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|
2420 assert(used_and_free == capacity_bytes, "Accounting is wrong"); |
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diff
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|
2421 } |
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diff
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|
2422 |
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parents:
diff
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|
2423 // Print total fragmentation for class and data metaspaces separately |
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diff
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|
2424 void MetaspaceAux::print_waste(outputStream* out) { |
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diff
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|
2425 |
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|
2426 size_t small_waste = 0, medium_waste = 0, large_waste = 0; |
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|
2427 size_t cls_small_waste = 0, cls_medium_waste = 0, cls_large_waste = 0; |
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|
2428 |
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diff
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|
2429 ClassLoaderDataGraphMetaspaceIterator iter; |
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diff
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|
2430 while (iter.repeat()) { |
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2431 Metaspace* msp = iter.get_next(); |
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|
2432 if (msp != NULL) { |
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2433 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2434 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2435 large_waste += msp->vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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|
2436 |
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2437 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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2438 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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2439 cls_large_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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|
2440 } |
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diff
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|
2441 } |
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|
2442 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
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|
2443 out->print(" data: small " SIZE_FORMAT " medium " SIZE_FORMAT, |
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|
2444 small_waste, medium_waste); |
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|
2445 out->print_cr(" class: small " SIZE_FORMAT, cls_small_waste); |
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diff
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|
2446 } |
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|
2447 |
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|
2448 // Dump global metaspace things from the end of ClassLoaderDataGraph |
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|
2449 void MetaspaceAux::dump(outputStream* out) { |
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|
2450 out->print_cr("All Metaspace:"); |
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|
2451 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
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|
2452 out->print("class space: "); print_on(out, Metaspace::ClassType); |
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diff
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|
2453 print_waste(out); |
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diff
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|
2454 } |
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|
2455 |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
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6885
diff
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|
2456 void MetaspaceAux::verify_free_chunks() { |
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mgerdin
parents:
6885
diff
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|
2457 Metaspace::space_list()->chunk_manager()->verify(); |
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mgerdin
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6885
diff
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|
2458 Metaspace::class_space_list()->chunk_manager()->verify(); |
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|
2459 } |
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6885
diff
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|
2460 |
6725
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2461 // Metaspace methods |
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|
2462 |
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2463 size_t Metaspace::_first_chunk_word_size = 0; |
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|
2464 |
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|
2465 Metaspace::Metaspace(Mutex* lock, size_t word_size) { |
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diff
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|
2466 initialize(lock, word_size); |
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diff
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|
2467 } |
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diff
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|
2468 |
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|
2469 Metaspace::Metaspace(Mutex* lock) { |
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|
2470 initialize(lock); |
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diff
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|
2471 } |
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diff
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|
2472 |
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|
2473 Metaspace::~Metaspace() { |
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parents:
diff
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|
2474 delete _vsm; |
da91efe96a93
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coleenp
parents:
diff
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|
2475 delete _class_vsm; |
da91efe96a93
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coleenp
parents:
diff
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|
2476 } |
da91efe96a93
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coleenp
parents:
diff
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|
2477 |
da91efe96a93
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diff
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|
2478 VirtualSpaceList* Metaspace::_space_list = NULL; |
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diff
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|
2479 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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diff
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|
2480 |
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parents:
diff
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|
2481 #define VIRTUALSPACEMULTIPLIER 2 |
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diff
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|
2482 |
da91efe96a93
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coleenp
parents:
diff
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|
2483 void Metaspace::global_initialize() { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2484 // Initialize the alignment for shared spaces. |
da91efe96a93
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coleenp
parents:
diff
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|
2485 int max_alignment = os::vm_page_size(); |
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diff
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|
2486 MetaspaceShared::set_max_alignment(max_alignment); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2487 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2488 if (DumpSharedSpaces) { |
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coleenp
parents:
diff
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|
2489 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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parents:
diff
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|
2490 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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parents:
diff
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|
2491 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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parents:
diff
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|
2492 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2493 |
da91efe96a93
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parents:
diff
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|
2494 // Initialize with the sum of the shared space sizes. The read-only |
da91efe96a93
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coleenp
parents:
diff
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|
2495 // and read write metaspace chunks will be allocated out of this and the |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2496 // remainder is the misc code and data chunks. |
da91efe96a93
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parents:
diff
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|
2497 size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2498 SharedMiscDataSize + SharedMiscCodeSize, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2499 os::vm_allocation_granularity()); |
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coleenp
parents:
diff
changeset
|
2500 size_t word_size = total/wordSize; |
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parents:
diff
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|
2501 _space_list = new VirtualSpaceList(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2502 } else { |
da91efe96a93
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coleenp
parents:
diff
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|
2503 // If using shared space, open the file that contains the shared space |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2504 // and map in the memory before initializing the rest of metaspace (so |
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coleenp
parents:
diff
changeset
|
2505 // the addresses don't conflict) |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2506 if (UseSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2507 FileMapInfo* mapinfo = new FileMapInfo(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2508 memset(mapinfo, 0, sizeof(FileMapInfo)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2509 |
da91efe96a93
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coleenp
parents:
diff
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|
2510 // Open the shared archive file, read and validate the header. If |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2511 // initialization fails, shared spaces [UseSharedSpaces] are |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2512 // disabled and the file is closed. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2513 // Map in spaces now also |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2514 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2515 FileMapInfo::set_current_info(mapinfo); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2516 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2517 assert(!mapinfo->is_open() && !UseSharedSpaces, |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2518 "archive file not closed or shared spaces not disabled."); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2519 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2520 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2521 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2522 // Initialize this before initializing the VirtualSpaceList |
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coleenp
parents:
diff
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|
2523 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2524 // Arbitrarily set the initial virtual space to a multiple |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2525 // of the boot class loader size. |
da91efe96a93
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coleenp
parents:
diff
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|
2526 size_t word_size = VIRTUALSPACEMULTIPLIER * Metaspace::first_chunk_word_size(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2527 // Initialize the list of virtual spaces. |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2528 _space_list = new VirtualSpaceList(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2529 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2530 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2531 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2532 // For UseCompressedKlassPointers the class space is reserved as a piece of the |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2533 // Java heap because the compression algorithm is the same for each. The |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2534 // argument passed in is at the top of the compressed space |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2535 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2536 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2537 assert(rs.size() >= ClassMetaspaceSize, err_msg("%d != %d", rs.size(), ClassMetaspaceSize)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2538 _class_space_list = new VirtualSpaceList(rs); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2539 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2540 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2541 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2542 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
coleenp
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6734
diff
changeset
|
2543 // 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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6734
diff
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|
2544 // the data metaspace. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2545 size_t word_size; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2546 size_t class_word_size; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2547 if (initial_size == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2548 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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|
2549 class_word_size = (size_t) SpaceManager::SmallChunk; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2550 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2551 word_size = initial_size; |
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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|
2552 // 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
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6734
diff
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|
2553 // 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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|
2554 // from there. This size calculated by -version. |
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
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6734
diff
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|
2555 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
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|
2556 (ClassMetaspaceSize/BytesPerWord)*2); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2557 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2558 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2559 assert(space_list() != NULL, |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2560 "Metadata VirtualSpaceList has not been initialized"); |
da91efe96a93
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|
2561 |
da91efe96a93
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parents:
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|
2562 _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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|
2563 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2564 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2565 } |
da91efe96a93
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diff
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|
2566 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2567 assert(class_space_list() != NULL, |
da91efe96a93
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parents:
diff
changeset
|
2568 "Class VirtualSpaceList has not been initialized"); |
da91efe96a93
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parents:
diff
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|
2569 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2570 // Allocate SpaceManager for classes. |
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diff
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|
2571 _class_vsm = new SpaceManager(lock, class_space_list()); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2572 if (_class_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2573 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2574 } |
da91efe96a93
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diff
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|
2575 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2576 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2577 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2578 // Allocate chunk for metadata objects |
da91efe96a93
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parents:
diff
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|
2579 Metachunk* new_chunk = |
da91efe96a93
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diff
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|
2580 space_list()->current_virtual_space()->get_chunk_vs_with_expand(word_size); |
da91efe96a93
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parents:
diff
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|
2581 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2582 if (new_chunk != NULL) { |
da91efe96a93
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parents:
diff
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|
2583 // Add to this manager's list of chunks in use and current_chunk(). |
da91efe96a93
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coleenp
parents:
diff
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|
2584 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2585 } |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2586 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2587 // Allocate chunk for class metadata objects |
da91efe96a93
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coleenp
parents:
diff
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|
2588 Metachunk* class_chunk = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2589 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
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|
2590 if (class_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2591 class_vsm()->add_chunk(class_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2592 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2593 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2594 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2595 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2596 // DumpSharedSpaces doesn't use class metadata area (yet) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2597 if (mdtype == ClassType && !DumpSharedSpaces) { |
6885 | 2598 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
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diff
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|
2599 } else { |
6885 | 2600 return vsm()->allocate(word_size); |
6725
da91efe96a93
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coleenp
parents:
diff
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|
2601 } |
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parents:
diff
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|
2602 } |
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coleenp
parents:
diff
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|
2603 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2604 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
|
2605 MetaWord* result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2606 MetaspaceGC::set_expand_after_GC(true); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2607 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2608 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
|
2609 MetaspaceGC::inc_capacity_until_GC(delta_words); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2610 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2611 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2612 " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2613 } |
6885 | 2614 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2615 result = allocate(word_size, mdtype); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2616 |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2617 return result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2618 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2619 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2620 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2621 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2622 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2623 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2624 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2625 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2626 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2627 size_t Metaspace::used_words(MetadataType mdtype) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2628 // return vsm()->allocation_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2629 return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2630 vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2631 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2632 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2633 size_t Metaspace::free_words(MetadataType mdtype) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2634 return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2635 vsm()->sum_free_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2636 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2637 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2638 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2639 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2640 // have been made. Don't include space in the global freelist and |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2641 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2642 // is already counted in some chunk. |
da91efe96a93
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coleenp
parents:
diff
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|
2643 size_t Metaspace::capacity_words(MetadataType mdtype) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2644 return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
da91efe96a93
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coleenp
parents:
diff
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|
2645 vsm()->sum_capacity_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2646 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2647 |
da91efe96a93
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coleenp
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diff
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|
2648 void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
da91efe96a93
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coleenp
parents:
diff
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|
2649 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2650 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 2651 // Don't take Heap_lock |
2652 MutexLocker ml(vsm()->lock()); | |
2653 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { | |
2654 // Dark matter. Too small for dictionary. | |
2655 #ifdef ASSERT | |
2656 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2657 #endif | |
2658 return; | |
6725
da91efe96a93
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coleenp
parents:
diff
changeset
|
2659 } |
6885 | 2660 if (is_class) { |
2661 class_vsm()->deallocate(ptr, word_size); | |
2662 } else { | |
2663 vsm()->deallocate(ptr, word_size); | |
2664 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2665 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2666 MutexLocker ml(vsm()->lock()); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2667 |
6885 | 2668 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
2669 // Dark matter. Too small for dictionary. | |
2670 #ifdef ASSERT | |
2671 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2672 #endif | |
2673 return; | |
6725
da91efe96a93
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coleenp
parents:
diff
changeset
|
2674 } |
6885 | 2675 if (is_class) { |
2676 class_vsm()->deallocate(ptr, word_size); | |
2677 } else { | |
2678 vsm()->deallocate(ptr, word_size); | |
2679 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2680 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2681 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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2682 |
6885 | 2683 Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
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2684 bool read_only, MetadataType mdtype, TRAPS) { |
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2685 if (HAS_PENDING_EXCEPTION) { |
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2686 assert(false, "Should not allocate with exception pending"); |
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2687 return NULL; // caller does a CHECK_NULL too |
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2688 } |
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2689 |
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2690 // SSS: Should we align the allocations and make sure the sizes are aligned. |
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2691 MetaWord* result = NULL; |
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2692 |
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2693 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
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2694 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
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2695 // Allocate in metaspaces without taking out a lock, because it deadlocks |
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2696 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
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2697 // to revisit this for application class data sharing. |
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2698 if (DumpSharedSpaces) { |
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2699 if (read_only) { |
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2700 result = loader_data->ro_metaspace()->allocate(word_size, NonClassType); |
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2701 } else { |
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2702 result = loader_data->rw_metaspace()->allocate(word_size, NonClassType); |
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2703 } |
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2704 if (result == NULL) { |
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2705 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
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2706 } |
6885 | 2707 return Metablock::initialize(result, word_size); |
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2708 } |
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2709 |
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2710 result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
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2711 |
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2712 if (result == NULL) { |
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2713 // Try to clean out some memory and retry. |
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2714 result = |
6885 | 2715 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
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2716 loader_data, word_size, mdtype); |
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2717 |
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2718 // If result is still null, we are out of memory. |
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2719 if (result == NULL) { |
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2720 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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2721 report_java_out_of_memory("Metadata space"); |
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2722 |
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2723 if (JvmtiExport::should_post_resource_exhausted()) { |
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2724 JvmtiExport::post_resource_exhausted( |
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2725 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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2726 "Metadata space"); |
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2727 } |
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2728 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); |
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2729 } |
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2730 } |
6885 | 2731 return Metablock::initialize(result, word_size); |
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2732 } |
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2733 |
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2734 void Metaspace::print_on(outputStream* out) const { |
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2735 // Print both class virtual space counts and metaspace. |
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2736 if (Verbose) { |
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2737 vsm()->print_on(out); |
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2738 class_vsm()->print_on(out); |
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2739 } |
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2740 } |
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2741 |
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2742 #ifndef PRODUCT |
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2743 bool Metaspace::contains(const void * ptr) const { |
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2744 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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2745 return true; |
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2746 } |
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2747 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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2748 return space_list()->contains(ptr) || class_space_list()->contains(ptr); |
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2749 } |
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2750 #endif |
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2751 |
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2752 void Metaspace::verify() { |
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2753 vsm()->verify(); |
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2754 class_vsm()->verify(); |
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2755 } |
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2756 |
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2757 void Metaspace::dump(outputStream* const out) const { |
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2758 if (UseMallocOnly) { |
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2759 // Just print usage for now |
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2760 out->print_cr("usage %d", used_words(Metaspace::NonClassType)); |
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2761 } |
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2762 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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2763 vsm()->dump(out); |
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2764 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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2765 class_vsm()->dump(out); |
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2766 } |