Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/metaspace.cpp @ 6736:11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
Summary: Don't allocate huge class metaspace size by default on x64
Reviewed-by: stefank, jmasa, kvn
author | coleenp |
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date | Fri, 07 Sep 2012 16:42:25 -0400 |
parents | 942bb29b20b0 |
children | 8da5e203b993 |
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" |
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27 #include "memory/collectorPolicy.hpp" |
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28 #include "memory/filemap.hpp" |
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29 #include "memory/freeList.hpp" |
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30 #include "memory/metaspace.hpp" |
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31 #include "memory/metaspaceShared.hpp" |
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32 #include "memory/resourceArea.hpp" |
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33 #include "memory/universe.hpp" |
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34 #include "runtime/globals.hpp" |
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35 #include "runtime/mutex.hpp" |
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36 #include "services/memTracker.hpp" |
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37 #include "utilities/copy.hpp" |
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38 #include "utilities/debug.hpp" |
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39 |
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40 // Define this macro to deallocate Metablock. If not defined, |
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41 // blocks are not yet deallocated and are only mangled. |
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42 #undef DEALLOCATE_BLOCKS |
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43 |
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44 // Easily recognizable patterns |
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45 // These patterns can be the same in 32bit or 64bit since |
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46 // they only have to be easily recognizable. |
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47 const void* metaspace_allocation_leader = (void*) 0X11111111; |
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48 const void* metaspace_allocation_trailer = (void*) 0X77777777; |
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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 const size_t metadata_space_manager_allocate = 0xf3f3f3f3; |
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57 |
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58 MetaWord* last_allocated = 0; |
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59 |
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60 // Used in declarations in SpaceManager and ChunkManager |
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61 enum ChunkIndex { |
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62 SmallIndex = 0, |
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63 MediumIndex = 1, |
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64 HumongousIndex = 2, |
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65 NumberOfFreeLists = 3 |
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66 }; |
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67 |
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68 static ChunkIndex next_chunk_index(ChunkIndex i) { |
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69 assert(i < NumberOfFreeLists, "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. |
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103 // |
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104 |
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105 // Metablock are the unit of allocation from a Chunk. It contains |
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106 // the size of the requested allocation in a debug build. |
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107 // Also in a debug build it has a marker before and after the |
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108 // body of the block. The address of the body is the address returned |
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109 // by the allocation. |
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110 // |
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111 // Layout in a debug build. In a product build only the body is present. |
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112 // |
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113 // +-----------+-----------+------------+ +-----------+ |
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114 // | word size | leader | body | ... | trailer | |
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115 // +-----------+-----------+------------+ +-----------+ |
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116 // |
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117 // A Metablock may be reused by its SpaceManager but are never moved between |
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118 // SpaceManagers. There is no explicit link to the Metachunk |
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119 // from which it was allocated. Metablock are not deallocated, rather |
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120 // the Metachunk it is a part of will be deallocated when it's |
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121 // associated class loader is collected. |
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122 // |
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123 // When the word size of a block is passed in to the deallocation |
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124 // call the word size no longer needs to be part of a Metablock. |
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125 |
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126 class Metablock { |
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127 friend class VMStructs; |
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128 private: |
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129 // Used to align the allocation (see below) and for debugging. |
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130 #ifdef ASSERT |
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131 struct { |
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132 size_t _word_size; |
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133 void* _leader; |
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134 } _header; |
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135 void* _data[1]; |
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136 #endif |
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137 static size_t _overhead; |
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138 |
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139 #ifdef ASSERT |
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140 void set_word_size(size_t v) { _header._word_size = v; } |
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141 void* leader() { return _header._leader; } |
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142 void* trailer() { |
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143 jlong index = (jlong) _header._word_size - sizeof(_header)/BytesPerWord - 1; |
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144 assert(index > 0, err_msg("Bad indexling of trailer %d", index)); |
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145 void** ptr = &_data[index]; |
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146 return *ptr; |
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147 } |
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148 void set_leader(void* v) { _header._leader = v; } |
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149 void set_trailer(void* v) { |
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150 void** ptr = &_data[_header._word_size - sizeof(_header)/BytesPerWord - 1]; |
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151 *ptr = v; |
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152 } |
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153 public: |
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154 size_t word_size() { return _header._word_size; } |
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155 #endif |
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156 public: |
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157 |
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158 static Metablock* initialize(MetaWord* p, size_t word_size); |
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159 |
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160 // This places the body of the block at a 2 word boundary |
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161 // because every block starts on a 2 word boundary. Work out |
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162 // how to make the body on a 2 word boundary if the block |
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163 // starts on a arbitrary boundary. JJJ |
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164 |
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165 #ifdef ASSERT |
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166 MetaWord* data() { return (MetaWord*) &_data[0]; } |
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167 #else |
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168 MetaWord* data() { return (MetaWord*) this; } |
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169 #endif |
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170 static Metablock* metablock_from_data(MetaWord* p) { |
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171 #ifdef ASSERT |
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172 size_t word_offset = offset_of(Metablock, _data)/BytesPerWord; |
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173 Metablock* result = (Metablock*) (p - word_offset); |
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174 return result; |
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175 #else |
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176 return (Metablock*) p; |
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177 #endif |
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178 } |
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179 |
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180 static size_t overhead() { return _overhead; } |
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181 void verify(); |
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182 }; |
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183 |
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184 // Metachunk - Quantum of allocation from a Virtualspace |
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185 // Metachunks are reused (when freed are put on a global freelist) and |
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186 // have no permanent association to a SpaceManager. |
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187 |
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188 // +--------------+ <- end |
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189 // | | --+ ---+ |
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190 // | | | free | |
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191 // | | | | |
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192 // | | | | capacity |
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193 // | | | | |
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194 // | | <- top --+ | |
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195 // | | ---+ | |
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196 // | | | used | |
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197 // | | | | |
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198 // | | | | |
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199 // +--------------+ <- bottom ---+ ---+ |
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200 |
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201 class Metachunk VALUE_OBJ_CLASS_SPEC { |
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202 // link to support lists of chunks |
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203 Metachunk* _next; |
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204 |
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205 MetaWord* _bottom; |
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206 MetaWord* _end; |
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207 MetaWord* _top; |
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208 size_t _word_size; |
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209 |
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210 // Metachunks are allocated out of a MetadataVirtualSpace and |
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211 // and use some of its space to describe itself (plus alignment |
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212 // considerations). Metadata is allocated in the rest of the chunk. |
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213 // This size is the overhead of maintaining the Metachunk within |
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214 // the space. |
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215 static size_t _overhead; |
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216 |
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217 void set_bottom(MetaWord* v) { _bottom = v; } |
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218 void set_end(MetaWord* v) { _end = v; } |
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219 void set_top(MetaWord* v) { _top = v; } |
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220 void set_word_size(size_t v) { _word_size = v; } |
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221 public: |
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222 |
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223 // Used to add a Metachunk to a list of Metachunks |
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224 void set_next(Metachunk* v) { _next = v; assert(v != this, "Boom");} |
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225 |
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226 Metablock* allocate(size_t word_size); |
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227 static Metachunk* initialize(MetaWord* ptr, size_t word_size); |
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228 |
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229 // Accessors |
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230 Metachunk* next() const { return _next; } |
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231 MetaWord* bottom() const { return _bottom; } |
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232 MetaWord* end() const { return _end; } |
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233 MetaWord* top() const { return _top; } |
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234 size_t word_size() const { return _word_size; } |
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235 static size_t overhead() { return _overhead; } |
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236 |
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237 // Reset top to bottom so chunk can be reused. |
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238 void reset_empty() { _top = (_bottom + _overhead); } |
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239 bool is_empty() { return _top == (_bottom + _overhead); } |
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240 |
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241 // used (has been allocated) |
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242 // free (available for future allocations) |
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243 // capacity (total size of chunk) |
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244 size_t used_word_size(); |
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245 size_t free_word_size(); |
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246 size_t capacity_word_size(); |
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247 |
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248 #ifdef ASSERT |
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249 void mangle() { |
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250 // Mangle the payload of the chunk and not the links that |
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251 // maintain list of chunks. |
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252 HeapWord* start = (HeapWord*)(bottom() + overhead()); |
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253 size_t word_size = capacity_word_size() - overhead(); |
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254 Copy::fill_to_words(start, word_size, metadata_chunk_initialize); |
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255 } |
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256 #endif // ASSERT |
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257 |
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258 void print_on(outputStream* st) const; |
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259 void verify(); |
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260 }; |
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261 |
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262 |
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263 // Pointer to list of Metachunks. |
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264 class ChunkList VALUE_OBJ_CLASS_SPEC { |
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265 // List of free chunks |
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266 Metachunk* _head; |
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267 |
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268 public: |
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269 // Constructor |
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270 ChunkList() : _head(NULL) {} |
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271 |
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272 // Accessors |
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273 Metachunk* head() { return _head; } |
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274 void set_head(Metachunk* v) { _head = v; } |
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275 |
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276 // Link at head of the list |
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277 void add_at_head(Metachunk* head, Metachunk* tail); |
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278 void add_at_head(Metachunk* head); |
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279 |
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280 size_t sum_list_size(); |
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281 size_t sum_list_count(); |
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282 size_t sum_list_capacity(); |
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283 }; |
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284 |
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285 // Manages the global free lists of chunks. |
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286 // Has three lists of free chunks, and a total size and |
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287 // count that includes all three |
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288 |
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289 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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290 |
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291 // Free list of chunks of different sizes. |
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292 // SmallChunk |
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293 // MediumChunk |
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294 // HumongousChunk |
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295 ChunkList _free_chunks[3]; |
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296 |
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297 // ChunkManager in all lists of this type |
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298 size_t _free_chunks_total; |
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299 size_t _free_chunks_count; |
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300 |
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301 void dec_free_chunks_total(size_t v) { |
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302 assert(_free_chunks_count > 0 && |
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303 _free_chunks_total > 0, |
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304 "About to go negative"); |
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305 Atomic::add_ptr(-1, &_free_chunks_count); |
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306 jlong minus_v = (jlong) - (jlong) v; |
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307 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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308 } |
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309 |
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310 // Debug support |
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311 |
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312 size_t sum_free_chunks(); |
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313 size_t sum_free_chunks_count(); |
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314 |
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315 void locked_verify_free_chunks_total(); |
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316 void locked_verify_free_chunks_count(); |
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317 void verify_free_chunks_count(); |
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318 |
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319 public: |
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320 |
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321 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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322 |
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323 // add or delete (return) a chunk to the global freelist. |
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324 Metachunk* chunk_freelist_allocate(size_t word_size); |
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325 void chunk_freelist_deallocate(Metachunk* chunk); |
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326 |
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327 // Total of the space in the free chunks list |
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328 size_t free_chunks_total(); |
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329 size_t free_chunks_total_in_bytes(); |
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330 |
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331 // Number of chunks in the free chunks list |
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332 size_t free_chunks_count(); |
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333 |
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334 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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335 Atomic::add_ptr(count, &_free_chunks_count); |
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336 Atomic::add_ptr(v, &_free_chunks_total); |
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337 } |
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338 ChunkList* free_medium_chunks() { return &_free_chunks[1]; } |
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339 ChunkList* free_small_chunks() { return &_free_chunks[0]; } |
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340 ChunkList* free_humongous_chunks() { return &_free_chunks[2]; } |
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341 |
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342 ChunkList* free_chunks(ChunkIndex index); |
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343 |
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344 // Returns the list for the given chunk word size. |
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345 ChunkList* find_free_chunks_list(size_t word_size); |
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346 |
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347 // Add and remove from a list by size. Selects |
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348 // list based on size of chunk. |
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349 void free_chunks_put(Metachunk* chuck); |
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350 Metachunk* free_chunks_get(size_t chunk_word_size); |
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351 |
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352 // Debug support |
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353 void verify(); |
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354 void locked_verify(); |
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355 void verify_free_chunks_total(); |
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356 |
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357 void locked_print_free_chunks(outputStream* st); |
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358 void locked_print_sum_free_chunks(outputStream* st); |
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359 }; |
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360 |
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361 |
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362 // Used to manage the free list of Metablocks (a block corresponds |
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363 // to the allocation of a quantum of metadata). |
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364 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
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365 #ifdef DEALLOCATE_BLOCKS |
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366 BinaryTreeDictionary<Metablock>* _dictionary; |
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367 #endif |
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368 static Metablock* initialize_free_chunk(Metablock* block, size_t word_size); |
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369 |
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370 #ifdef DEALLOCATE_BLOCKS |
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371 // Accessors |
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372 BinaryTreeDictionary<Metablock>* dictionary() const { return _dictionary; } |
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373 #endif |
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374 |
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375 public: |
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376 BlockFreelist(); |
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377 ~BlockFreelist(); |
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378 |
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379 // Get and return a block to the free list |
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380 Metablock* get_block(size_t word_size); |
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381 void return_block(Metablock* block, size_t word_size); |
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382 |
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383 size_t totalSize() { |
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384 #ifdef DEALLOCATE_BLOCKS |
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385 if (dictionary() == NULL) { |
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386 return 0; |
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387 } else { |
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388 return dictionary()->totalSize(); |
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389 } |
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390 #else |
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391 return 0; |
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392 #endif |
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393 } |
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394 |
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395 void print_on(outputStream* st) const; |
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396 }; |
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397 |
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398 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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399 friend class VirtualSpaceList; |
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400 |
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401 // Link to next VirtualSpaceNode |
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402 VirtualSpaceNode* _next; |
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403 |
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404 // total in the VirtualSpace |
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405 MemRegion _reserved; |
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406 ReservedSpace _rs; |
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407 VirtualSpace _virtual_space; |
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408 MetaWord* _top; |
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409 |
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410 // Convenience functions for logical bottom and end |
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411 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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412 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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413 |
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414 // Convenience functions to access the _virtual_space |
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415 char* low() const { return virtual_space()->low(); } |
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416 char* high() const { return virtual_space()->high(); } |
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417 |
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418 public: |
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419 |
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420 VirtualSpaceNode(size_t byte_size); |
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421 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs) {} |
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422 ~VirtualSpaceNode(); |
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423 |
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424 // address of next available space in _virtual_space; |
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425 // Accessors |
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426 VirtualSpaceNode* next() { return _next; } |
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427 void set_next(VirtualSpaceNode* v) { _next = v; } |
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428 |
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429 void set_reserved(MemRegion const v) { _reserved = v; } |
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430 void set_top(MetaWord* v) { _top = v; } |
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431 |
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432 // Accessors |
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433 MemRegion* reserved() { return &_reserved; } |
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434 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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435 |
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436 // Returns true if "word_size" is available in the virtual space |
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437 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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438 |
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439 MetaWord* top() const { return _top; } |
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440 void inc_top(size_t word_size) { _top += word_size; } |
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441 |
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442 // used and capacity in this single entry in the list |
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443 size_t used_words_in_vs() const; |
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444 size_t capacity_words_in_vs() const; |
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445 |
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446 bool initialize(); |
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447 |
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448 // get space from the virtual space |
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449 Metachunk* take_from_committed(size_t chunk_word_size); |
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450 |
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451 // Allocate a chunk from the virtual space and return it. |
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452 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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453 Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
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454 |
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455 // Expands/shrinks the committed space in a virtual space. Delegates |
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456 // to Virtualspace |
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457 bool expand_by(size_t words, bool pre_touch = false); |
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458 bool shrink_by(size_t words); |
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459 |
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460 // Debug support |
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461 static void verify_virtual_space_total(); |
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462 static void verify_virtual_space_count(); |
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463 void mangle(); |
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464 |
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465 void print_on(outputStream* st) const; |
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466 }; |
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467 |
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468 // byte_size is the size of the associated virtualspace. |
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469 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0) { |
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470 // This allocates memory with mmap. For DumpSharedspaces, allocate the |
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471 // space at low memory so that other shared images don't conflict. |
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472 // This is the same address as memory needed for UseCompressedOops but |
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473 // compressed oops don't work with CDS (offsets in metadata are wrong), so |
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474 // borrow the same address. |
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475 if (DumpSharedSpaces) { |
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476 char* shared_base = (char*)HeapBaseMinAddress; |
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477 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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478 if (_rs.is_reserved()) { |
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479 assert(_rs.base() == shared_base, "should match"); |
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480 } else { |
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481 // If we are dumping the heap, then allocate a wasted block of address |
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482 // space in order to push the heap to a lower address. This extra |
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483 // address range allows for other (or larger) libraries to be loaded |
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484 // without them occupying the space required for the shared spaces. |
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485 uintx reserved = 0; |
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486 uintx block_size = 64*1024*1024; |
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487 while (reserved < SharedDummyBlockSize) { |
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488 char* dummy = os::reserve_memory(block_size); |
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489 reserved += block_size; |
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490 } |
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491 _rs = ReservedSpace(byte_size); |
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492 } |
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493 MetaspaceShared::set_shared_rs(&_rs); |
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494 } else { |
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495 _rs = ReservedSpace(byte_size); |
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496 } |
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497 |
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498 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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499 } |
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500 |
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501 // List of VirtualSpaces for metadata allocation. |
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502 // It has a _next link for singly linked list and a MemRegion |
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503 // for total space in the VirtualSpace. |
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504 class VirtualSpaceList : public CHeapObj<mtClass> { |
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505 friend class VirtualSpaceNode; |
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506 |
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507 enum VirtualSpaceSizes { |
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508 VirtualSpaceSize = 256 * K |
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509 }; |
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510 |
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511 // Global list of virtual spaces |
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512 // Head of the list |
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513 VirtualSpaceNode* _virtual_space_list; |
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514 // virtual space currently being used for allocations |
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515 VirtualSpaceNode* _current_virtual_space; |
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516 // Free chunk list for all other metadata |
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517 ChunkManager _chunk_manager; |
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518 |
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519 // Can this virtual list allocate >1 spaces? Also, used to determine |
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520 // whether to allocate unlimited small chunks in this virtual space |
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521 bool _is_class; |
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522 bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
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523 |
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524 // Sum of space in all virtual spaces and number of virtual spaces |
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525 size_t _virtual_space_total; |
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526 size_t _virtual_space_count; |
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527 |
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528 ~VirtualSpaceList(); |
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529 |
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530 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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531 |
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532 void set_virtual_space_list(VirtualSpaceNode* v) { |
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533 _virtual_space_list = v; |
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534 } |
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535 void set_current_virtual_space(VirtualSpaceNode* v) { |
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536 _current_virtual_space = v; |
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537 } |
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538 |
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539 void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
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540 |
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541 // Get another virtual space and add it to the list. This |
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542 // is typically prompted by a failed attempt to allocate a chunk |
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543 // and is typically followed by the allocation of a chunk. |
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544 bool grow_vs(size_t vs_word_size); |
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545 |
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546 public: |
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547 VirtualSpaceList(size_t word_size); |
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548 VirtualSpaceList(ReservedSpace rs); |
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549 |
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550 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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551 |
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552 VirtualSpaceNode* current_virtual_space() { |
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553 return _current_virtual_space; |
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554 } |
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555 |
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556 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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557 bool is_class() const { return _is_class; } |
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558 |
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559 // Allocate the first virtualspace. |
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560 void initialize(size_t word_size); |
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561 |
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562 size_t virtual_space_total() { return _virtual_space_total; } |
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563 void inc_virtual_space_total(size_t v) { |
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564 Atomic::add_ptr(v, &_virtual_space_total); |
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565 } |
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566 |
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567 size_t virtual_space_count() { return _virtual_space_count; } |
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568 void inc_virtual_space_count() { |
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569 Atomic::inc_ptr(&_virtual_space_count); |
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570 } |
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571 |
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572 // Used and capacity in the entire list of virtual spaces. |
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573 // These are global values shared by all Metaspaces |
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574 size_t capacity_words_sum(); |
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575 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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576 size_t used_words_sum(); |
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577 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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578 |
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579 bool contains(const void *ptr); |
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580 |
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581 void print_on(outputStream* st) const; |
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582 |
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583 class VirtualSpaceListIterator : public StackObj { |
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584 VirtualSpaceNode* _virtual_spaces; |
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585 public: |
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586 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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587 _virtual_spaces(virtual_spaces) {} |
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588 |
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589 bool repeat() { |
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590 return _virtual_spaces != NULL; |
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591 } |
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592 |
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593 VirtualSpaceNode* get_next() { |
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594 VirtualSpaceNode* result = _virtual_spaces; |
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595 if (_virtual_spaces != NULL) { |
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596 _virtual_spaces = _virtual_spaces->next(); |
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597 } |
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598 return result; |
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599 } |
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600 }; |
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601 }; |
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602 |
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603 |
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604 class Metadebug : AllStatic { |
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605 // Debugging support for Metaspaces |
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606 static int _deallocate_block_a_lot_count; |
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607 static int _deallocate_chunk_a_lot_count; |
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608 static int _allocation_fail_alot_count; |
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609 |
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610 public: |
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611 static int deallocate_block_a_lot_count() { |
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612 return _deallocate_block_a_lot_count; |
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613 } |
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614 static void set_deallocate_block_a_lot_count(int v) { |
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615 _deallocate_block_a_lot_count = v; |
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616 } |
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617 static void inc_deallocate_block_a_lot_count() { |
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618 _deallocate_block_a_lot_count++; |
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619 } |
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620 static int deallocate_chunk_a_lot_count() { |
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621 return _deallocate_chunk_a_lot_count; |
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622 } |
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623 static void reset_deallocate_chunk_a_lot_count() { |
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624 _deallocate_chunk_a_lot_count = 1; |
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625 } |
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626 static void inc_deallocate_chunk_a_lot_count() { |
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627 _deallocate_chunk_a_lot_count++; |
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628 } |
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629 |
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630 static void init_allocation_fail_alot_count(); |
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631 #ifdef ASSERT |
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632 static bool test_metadata_failure(); |
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633 #endif |
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634 |
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635 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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636 size_t chunk_word_size); |
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637 static void deallocate_block_a_lot(SpaceManager* sm, |
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638 size_t chunk_word_size); |
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639 |
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640 }; |
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641 |
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642 int Metadebug::_deallocate_block_a_lot_count = 0; |
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643 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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644 int Metadebug::_allocation_fail_alot_count = 0; |
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645 |
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646 // SpaceManager - used by Metaspace to handle allocations |
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647 class SpaceManager : public CHeapObj<mtClass> { |
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648 friend class Metaspace; |
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649 friend class Metadebug; |
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650 |
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651 private: |
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652 // protects allocations and contains. |
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653 Mutex* const _lock; |
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654 |
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655 // List of chunks in use by this SpaceManager. Allocations |
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656 // are done from the current chunk. The list is used for deallocating |
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657 // chunks when the SpaceManager is freed. |
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658 Metachunk* _chunks_in_use[NumberOfFreeLists]; |
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659 Metachunk* _current_chunk; |
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660 |
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661 // Virtual space where allocation comes from. |
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662 VirtualSpaceList* _vs_list; |
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663 |
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664 // Number of small chunks to allocate to a manager |
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665 // If class space manager, small chunks are unlimited |
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666 static uint const _small_chunk_limit; |
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667 bool has_small_chunk_limit() { return !vs_list()->is_class(); } |
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668 |
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669 // Sum of all space in allocated chunks |
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670 size_t _allocation_total; |
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671 |
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672 // Free lists of blocks are per SpaceManager since they |
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673 // are assumed to be in chunks in use by the SpaceManager |
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674 // and all chunks in use by a SpaceManager are freed when |
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675 // the class loader using the SpaceManager is collected. |
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676 BlockFreelist _block_freelists; |
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677 |
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678 // protects virtualspace and chunk expansions |
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679 static const char* _expand_lock_name; |
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680 static const int _expand_lock_rank; |
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681 static Mutex* const _expand_lock; |
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682 |
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683 // Accessors |
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684 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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685 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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686 |
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687 BlockFreelist* block_freelists() const { |
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688 return (BlockFreelist*) &_block_freelists; |
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689 } |
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690 |
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691 VirtualSpaceList* vs_list() const { return _vs_list; } |
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692 |
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693 Metachunk* current_chunk() const { return _current_chunk; } |
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694 void set_current_chunk(Metachunk* v) { |
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695 _current_chunk = v; |
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696 } |
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697 |
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698 Metachunk* find_current_chunk(size_t word_size); |
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699 |
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700 // Add chunk to the list of chunks in use |
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701 void add_chunk(Metachunk* v, bool make_current); |
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702 |
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703 // Debugging support |
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704 void verify_chunks_in_use_index(ChunkIndex index, Metachunk* v) { |
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705 switch (index) { |
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706 case 0: |
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707 assert(v->word_size() == SmallChunk, "Not a SmallChunk"); |
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708 break; |
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709 case 1: |
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710 assert(v->word_size() == MediumChunk, "Not a MediumChunk"); |
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711 break; |
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712 case 2: |
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713 assert(v->word_size() > MediumChunk, "Not a HumongousChunk"); |
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714 break; |
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715 default: |
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716 assert(false, "Wrong list."); |
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717 } |
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718 } |
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719 |
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720 protected: |
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721 Mutex* lock() const { return _lock; } |
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722 |
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723 public: |
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724 SpaceManager(Mutex* lock, VirtualSpaceList* vs_list); |
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725 ~SpaceManager(); |
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726 |
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727 enum ChunkSizes { // in words. |
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728 SmallChunk = 512, |
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729 MediumChunk = 8 * K, |
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730 MediumChunkBunch = 4 * MediumChunk |
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731 }; |
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732 |
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733 // Accessors |
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734 size_t allocation_total() const { return _allocation_total; } |
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735 void inc_allocation_total(size_t v) { Atomic::add_ptr(v, &_allocation_total); } |
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736 static bool is_humongous(size_t word_size) { return word_size > MediumChunk; } |
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737 |
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738 static Mutex* expand_lock() { return _expand_lock; } |
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739 |
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740 size_t sum_capacity_in_chunks_in_use() const; |
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741 size_t sum_used_in_chunks_in_use() const; |
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742 size_t sum_free_in_chunks_in_use() const; |
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743 size_t sum_waste_in_chunks_in_use() const; |
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744 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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745 |
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746 size_t sum_count_in_chunks_in_use(); |
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747 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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748 |
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749 // Block allocation and deallocation. |
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750 // Allocates a block from the current chunk |
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751 MetaWord* allocate(size_t word_size); |
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752 |
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753 // Helper for allocations |
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754 Metablock* allocate_work(size_t word_size); |
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755 |
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756 // Returns a block to the per manager freelist |
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757 void deallocate(MetaWord* p); |
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758 |
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759 // Based on the allocation size and a minimum chunk size, |
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760 // returned chunk size (for expanding space for chunk allocation). |
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761 size_t calc_chunk_size(size_t allocation_word_size); |
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762 |
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763 // Called when an allocation from the current chunk fails. |
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764 // Gets a new chunk (may require getting a new virtual space), |
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765 // and allocates from that chunk. |
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766 Metablock* grow_and_allocate(size_t word_size); |
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767 |
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768 // debugging support. |
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769 |
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770 void dump(outputStream* const out) const; |
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771 void print_on(outputStream* st) const; |
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772 void locked_print_chunks_in_use_on(outputStream* st) const; |
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773 |
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774 void verify(); |
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775 #ifdef ASSERT |
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776 void mangle_freed_chunks(); |
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777 void verify_allocation_total(); |
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778 #endif |
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779 }; |
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780 |
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781 uint const SpaceManager::_small_chunk_limit = 4; |
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782 |
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783 const char* SpaceManager::_expand_lock_name = |
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784 "SpaceManager chunk allocation lock"; |
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785 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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786 Mutex* const SpaceManager::_expand_lock = |
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787 new Mutex(SpaceManager::_expand_lock_rank, |
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788 SpaceManager::_expand_lock_name, |
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789 Mutex::_allow_vm_block_flag); |
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790 |
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791 #ifdef ASSERT |
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792 size_t Metablock::_overhead = |
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793 Chunk::aligned_overhead_size(sizeof(Metablock)) / BytesPerWord; |
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794 #else |
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795 size_t Metablock::_overhead = 0; |
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796 #endif |
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797 size_t Metachunk::_overhead = |
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798 Chunk::aligned_overhead_size(sizeof(Metachunk)) / BytesPerWord; |
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799 |
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800 // New blocks returned by the Metaspace are zero initialized. |
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801 // We should fix the constructors to not assume this instead. |
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802 Metablock* Metablock::initialize(MetaWord* p, size_t word_size) { |
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803 Metablock* result = (Metablock*) p; |
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804 |
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805 // Clear the memory |
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806 Copy::fill_to_aligned_words((HeapWord*)result, word_size); |
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807 #ifdef ASSERT |
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808 result->set_word_size(word_size); |
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809 // Check after work size is set. |
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810 result->set_leader((void*) metaspace_allocation_leader); |
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811 result->set_trailer((void*) metaspace_allocation_trailer); |
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812 #endif |
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813 return result; |
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814 } |
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815 |
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816 void Metablock::verify() { |
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817 #ifdef ASSERT |
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818 assert(leader() == metaspace_allocation_leader && |
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819 trailer() == metaspace_allocation_trailer, |
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820 "block has been corrupted"); |
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821 #endif |
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822 } |
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823 |
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824 // Metachunk methods |
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825 |
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826 Metachunk* Metachunk::initialize(MetaWord* ptr, size_t word_size) { |
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827 // Set bottom, top, and end. Allow space for the Metachunk itself |
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828 Metachunk* chunk = (Metachunk*) ptr; |
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829 |
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830 MetaWord* chunk_bottom = ptr + _overhead; |
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831 chunk->set_bottom(ptr); |
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832 chunk->set_top(chunk_bottom); |
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833 MetaWord* chunk_end = ptr + word_size; |
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834 assert(chunk_end > chunk_bottom, "Chunk must be too small"); |
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835 chunk->set_end(chunk_end); |
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836 chunk->set_next(NULL); |
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837 chunk->set_word_size(word_size); |
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838 #ifdef ASSERT |
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839 size_t data_word_size = pointer_delta(chunk_end, chunk_bottom, sizeof(MetaWord)); |
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840 Copy::fill_to_words((HeapWord*) chunk_bottom, data_word_size, metadata_chunk_initialize); |
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841 #endif |
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842 return chunk; |
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843 } |
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844 |
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845 |
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846 Metablock* Metachunk::allocate(size_t word_size) { |
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847 Metablock* result = NULL; |
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848 // If available, bump the pointer to allocate. |
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849 if (free_word_size() >= word_size) { |
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850 result = Metablock::initialize(_top, word_size); |
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851 _top = _top + word_size; |
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852 } |
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853 #ifdef ASSERT |
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854 assert(result == NULL || |
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855 result->word_size() == word_size, |
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856 "Block size is not set correctly"); |
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857 #endif |
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858 return result; |
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859 } |
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860 |
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861 // _bottom points to the start of the chunk including the overhead. |
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862 size_t Metachunk::used_word_size() { |
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863 return pointer_delta(_top, _bottom, sizeof(MetaWord)); |
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864 } |
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865 |
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866 size_t Metachunk::free_word_size() { |
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867 return pointer_delta(_end, _top, sizeof(MetaWord)); |
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868 } |
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869 |
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870 size_t Metachunk::capacity_word_size() { |
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871 return pointer_delta(_end, _bottom, sizeof(MetaWord)); |
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872 } |
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873 |
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874 void Metachunk::print_on(outputStream* st) const { |
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875 st->print_cr("Metachunk:" |
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876 " bottom " PTR_FORMAT " top " PTR_FORMAT |
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877 " end " PTR_FORMAT " size " SIZE_FORMAT, |
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878 bottom(), top(), end(), word_size()); |
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879 } |
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880 |
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881 |
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882 void Metachunk::verify() { |
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883 #ifdef ASSERT |
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884 // Cannot walk through the blocks unless the blocks have |
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885 // headers with sizes. |
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886 MetaWord* curr = bottom() + overhead(); |
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887 while (curr < top()) { |
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888 Metablock* block = (Metablock*) curr; |
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889 size_t word_size = block->word_size(); |
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890 block->verify(); |
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891 curr = curr + word_size; |
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892 } |
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893 #endif |
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894 return; |
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895 } |
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896 |
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897 // BlockFreelist methods |
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898 |
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899 #ifdef DEALLOCATE_BLOCKS |
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900 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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901 #else |
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902 BlockFreelist::BlockFreelist() {} |
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903 #endif |
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904 |
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905 BlockFreelist::~BlockFreelist() { |
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906 #ifdef DEALLOCATE_BLOCKS |
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907 if (_dictionary != NULL) { |
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908 if (Verbose && TraceMetadataChunkAllocation) { |
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909 _dictionary->print_free_lists(gclog_or_tty); |
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910 } |
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911 delete _dictionary; |
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912 } |
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913 #endif |
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914 } |
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|
915 |
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916 Metablock* BlockFreelist::initialize_free_chunk(Metablock* block, size_t word_size) { |
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917 #ifdef DEALLOCATE_BLOCKS |
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918 #ifdef ASSERT |
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919 assert(word_size = block->word_size(), "Wrong chunk size"); |
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920 #endif |
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921 Metablock* result = block; |
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922 result->setSize(word_size); |
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923 result->linkPrev(NULL); |
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924 result->linkNext(NULL); |
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925 |
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926 return result; |
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|
927 #else |
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928 ShouldNotReachHere(); |
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929 return block; |
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930 #endif |
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931 } |
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932 |
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933 void BlockFreelist::return_block(Metablock* block, size_t word_size) { |
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934 #ifdef ASSERT |
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935 assert(word_size = block->word_size(), "Block size is wrong");; |
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936 #endif |
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937 Metablock* free_chunk = initialize_free_chunk(block, word_size); |
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938 #ifdef DEALLOCATE_BLOCKS |
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939 if (dictionary() == NULL) { |
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940 _dictionary = new BinaryTreeDictionary<Metablock>(false /* adaptive_freelists */); |
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941 } |
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942 dictionary()->returnChunk(free_chunk); |
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943 #endif |
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944 } |
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945 |
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946 Metablock* BlockFreelist::get_block(size_t word_size) { |
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|
947 #ifdef DEALLOCATE_BLOCKS |
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948 if (dictionary() == NULL) { |
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949 return NULL; |
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|
950 } |
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951 |
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952 Metablock* free_chunk = |
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953 dictionary()->getChunk(word_size, FreeBlockDictionary<Metablock>::exactly); |
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954 #else |
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955 Metablock* free_chunk = NULL; |
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956 #endif |
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957 if (free_chunk == NULL) { |
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958 return NULL; |
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959 } |
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960 assert(free_chunk->word_size() == word_size, "Size of chunk is incorrect"); |
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961 Metablock* block = Metablock::initialize((MetaWord*) free_chunk, word_size); |
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962 #ifdef ASSERT |
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963 assert(block->word_size() == word_size, "Block size is not set correctly"); |
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964 #endif |
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965 |
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966 return block; |
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967 } |
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968 |
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969 void BlockFreelist::print_on(outputStream* st) const { |
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970 #ifdef DEALLOCATE_BLOCKS |
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971 if (dictionary() == NULL) { |
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972 return; |
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973 } |
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974 dictionary()->print_free_lists(st); |
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975 #else |
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976 return; |
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977 #endif |
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978 } |
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979 |
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980 // VirtualSpaceNode methods |
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981 |
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982 VirtualSpaceNode::~VirtualSpaceNode() { |
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983 _rs.release(); |
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984 } |
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985 |
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986 size_t VirtualSpaceNode::used_words_in_vs() const { |
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987 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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988 } |
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989 |
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990 // Space committed in the VirtualSpace |
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991 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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992 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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993 } |
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994 |
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995 |
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996 // Allocates the chunk from the virtual space only. |
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997 // This interface is also used internally for debugging. Not all |
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998 // chunks removed here are necessarily used for allocation. |
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999 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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1000 // Bottom of the new chunk |
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1001 MetaWord* chunk_limit = top(); |
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1002 assert(chunk_limit != NULL, "Not safe to call this method"); |
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1003 |
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1004 if (!is_available(chunk_word_size)) { |
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1005 if (TraceMetadataChunkAllocation) { |
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1006 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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1007 // Dump some information about the virtual space that is nearly full |
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1008 print_on(tty); |
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1009 } |
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1010 return NULL; |
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1011 } |
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1012 |
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1013 // Take the space (bump top on the current virtual space). |
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1014 inc_top(chunk_word_size); |
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1015 |
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1016 // Point the chunk at the space |
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1017 Metachunk* result = Metachunk::initialize(chunk_limit, chunk_word_size); |
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1018 return result; |
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1019 } |
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1020 |
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1021 |
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1022 // Expand the virtual space (commit more of the reserved space) |
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1023 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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1024 size_t bytes = words * BytesPerWord; |
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1025 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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1026 if (TraceMetavirtualspaceAllocation && !result) { |
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1027 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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1028 "for byte size " SIZE_FORMAT, bytes); |
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1029 virtual_space()->print(); |
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1030 } |
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1031 return result; |
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1032 } |
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1033 |
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1034 // Shrink the virtual space (commit more of the reserved space) |
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1035 bool VirtualSpaceNode::shrink_by(size_t words) { |
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1036 size_t bytes = words * BytesPerWord; |
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1037 virtual_space()->shrink_by(bytes); |
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1038 return true; |
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1039 } |
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1040 |
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1041 // Add another chunk to the chunk list. |
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1042 |
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1043 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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1044 assert_lock_strong(SpaceManager::expand_lock()); |
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1045 Metachunk* result = NULL; |
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1046 |
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1047 return take_from_committed(chunk_word_size); |
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1048 } |
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1049 |
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1050 Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
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1051 assert_lock_strong(SpaceManager::expand_lock()); |
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1052 |
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1053 Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
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1054 |
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1055 if (new_chunk == NULL) { |
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1056 // Only a small part of the virtualspace is committed when first |
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1057 // allocated so committing more here can be expected. |
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1058 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1059 size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
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1060 page_size_words); |
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1061 expand_by(aligned_expand_vs_by_words, false); |
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1062 new_chunk = get_chunk_vs(chunk_word_size); |
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1063 } |
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1064 return new_chunk; |
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1065 } |
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1066 |
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1067 bool VirtualSpaceNode::initialize() { |
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1068 |
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1069 if (!_rs.is_reserved()) { |
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1070 return false; |
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1071 } |
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1072 |
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1073 // Commit only 1 page instead of the whole reserved space _rs.size() |
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1074 size_t committed_byte_size = os::vm_page_size(); |
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1075 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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1076 if (result) { |
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1077 set_top((MetaWord*)virtual_space()->low()); |
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1078 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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1079 (HeapWord*)(_rs.base() + _rs.size()))); |
6726
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1080 |
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1081 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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1082 err_msg("Reserved start was not set properly " PTR_FORMAT |
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1083 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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1084 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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1085 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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1086 " != " SIZE_FORMAT, reserved()->word_size(), |
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1087 _rs.size() / BytesPerWord)); |
6725
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1088 } |
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1089 |
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1090 return result; |
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1091 } |
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1092 |
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1093 void VirtualSpaceNode::print_on(outputStream* st) const { |
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1094 size_t used = used_words_in_vs(); |
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1095 size_t capacity = capacity_words_in_vs(); |
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1096 VirtualSpace* vs = virtual_space(); |
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1097 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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1098 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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1099 PTR_FORMAT ", " PTR_FORMAT ")", |
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1100 vs, capacity / K, used * 100 / capacity, |
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1101 bottom(), top(), end(), |
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1102 vs->high_boundary()); |
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1103 } |
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1104 |
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1105 void VirtualSpaceNode::mangle() { |
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1106 size_t word_size = capacity_words_in_vs(); |
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1107 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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1108 } |
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1109 |
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1110 // VirtualSpaceList methods |
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1111 // Space allocated from the VirtualSpace |
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1112 |
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1113 VirtualSpaceList::~VirtualSpaceList() { |
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1114 VirtualSpaceListIterator iter(virtual_space_list()); |
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1115 while (iter.repeat()) { |
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1116 VirtualSpaceNode* vsl = iter.get_next(); |
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1117 delete vsl; |
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1118 } |
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1119 } |
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1120 |
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1121 size_t VirtualSpaceList::used_words_sum() { |
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1122 size_t allocated_by_vs = 0; |
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1123 VirtualSpaceListIterator iter(virtual_space_list()); |
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1124 while (iter.repeat()) { |
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1125 VirtualSpaceNode* vsl = iter.get_next(); |
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1126 // Sum used region [bottom, top) in each virtualspace |
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1127 allocated_by_vs += vsl->used_words_in_vs(); |
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1128 } |
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1129 assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
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1130 err_msg("Total in free chunks " SIZE_FORMAT |
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1131 " greater than total from virtual_spaces " SIZE_FORMAT, |
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1132 allocated_by_vs, chunk_manager()->free_chunks_total())); |
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1133 size_t used = |
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1134 allocated_by_vs - chunk_manager()->free_chunks_total(); |
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1135 return used; |
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1136 } |
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1137 |
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1138 // Space available in all MetadataVirtualspaces allocated |
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1139 // for metadata. This is the upper limit on the capacity |
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1140 // of chunks allocated out of all the MetadataVirtualspaces. |
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1141 size_t VirtualSpaceList::capacity_words_sum() { |
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1142 size_t capacity = 0; |
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1143 VirtualSpaceListIterator iter(virtual_space_list()); |
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1144 while (iter.repeat()) { |
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1145 VirtualSpaceNode* vsl = iter.get_next(); |
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1146 capacity += vsl->capacity_words_in_vs(); |
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1147 } |
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1148 return capacity; |
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1149 } |
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1150 |
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1151 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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1152 _is_class(false), |
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1153 _virtual_space_list(NULL), |
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1154 _current_virtual_space(NULL), |
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1155 _virtual_space_total(0), |
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1156 _virtual_space_count(0) { |
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1157 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1158 Mutex::_no_safepoint_check_flag); |
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1159 bool initialization_succeeded = grow_vs(word_size); |
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1160 |
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1161 assert(initialization_succeeded, |
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1162 " VirtualSpaceList initialization should not fail"); |
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1163 } |
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1164 |
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1165 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1166 _is_class(true), |
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1167 _virtual_space_list(NULL), |
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1168 _current_virtual_space(NULL), |
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1169 _virtual_space_total(0), |
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1170 _virtual_space_count(0) { |
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1171 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1172 Mutex::_no_safepoint_check_flag); |
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1173 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1174 bool succeeded = class_entry->initialize(); |
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1175 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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1176 link_vs(class_entry, rs.size()/BytesPerWord); |
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1177 } |
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1178 |
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1179 // Allocate another meta virtual space and add it to the list. |
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1180 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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1181 assert_lock_strong(SpaceManager::expand_lock()); |
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1182 if (vs_word_size == 0) { |
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1183 return false; |
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1184 } |
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1185 // Reserve the space |
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1186 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1187 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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1188 |
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1189 // Allocate the meta virtual space and initialize it. |
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1190 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1191 if (!new_entry->initialize()) { |
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1192 delete new_entry; |
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1193 return false; |
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1194 } else { |
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1195 link_vs(new_entry, vs_word_size); |
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1196 return true; |
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1197 } |
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1198 } |
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1199 |
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1200 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
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1201 if (virtual_space_list() == NULL) { |
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1202 set_virtual_space_list(new_entry); |
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1203 } else { |
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1204 current_virtual_space()->set_next(new_entry); |
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1205 } |
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1206 set_current_virtual_space(new_entry); |
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1207 inc_virtual_space_total(vs_word_size); |
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1208 inc_virtual_space_count(); |
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1209 #ifdef ASSERT |
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1210 new_entry->mangle(); |
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1211 #endif |
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1212 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1213 VirtualSpaceNode* vsl = current_virtual_space(); |
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1214 vsl->print_on(tty); |
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1215 } |
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1216 } |
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1217 |
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1218 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1219 size_t grow_chunks_by_words) { |
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1220 |
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1221 // Get a chunk from the chunk freelist |
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1222 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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1223 |
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1224 // Allocate a chunk out of the current virtual space. |
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1225 if (next == NULL) { |
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1226 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1227 } |
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1228 |
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1229 if (next == NULL) { |
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1230 // Not enough room in current virtual space. Try to commit |
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1231 // more space. |
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1232 size_t expand_vs_by_words = MAX2((size_t)SpaceManager::MediumChunkBunch, |
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1233 grow_chunks_by_words); |
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1234 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1235 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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1236 page_size_words); |
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1237 bool vs_expanded = |
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1238 current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
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1239 if (!vs_expanded) { |
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1240 // Should the capacity of the metaspaces be expanded for |
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1241 // this allocation? If it's the virtual space for classes and is |
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1242 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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1243 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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1244 // Get another virtual space. |
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1245 size_t grow_vs_words = |
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1246 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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1247 if (grow_vs(grow_vs_words)) { |
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1248 // Got it. It's on the list now. Get a chunk from it. |
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1249 next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
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1250 } |
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1251 if (TraceMetadataHumongousAllocation && SpaceManager::is_humongous(word_size)) { |
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1252 gclog_or_tty->print_cr(" aligned_expand_vs_by_words " PTR_FORMAT, |
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1253 aligned_expand_vs_by_words); |
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1254 gclog_or_tty->print_cr(" grow_vs_words " PTR_FORMAT, |
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1255 grow_vs_words); |
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1256 } |
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1257 } else { |
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1258 // Allocation will fail and induce a GC |
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1259 if (TraceMetadataChunkAllocation && Verbose) { |
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1260 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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1261 " Fail instead of expand the metaspace"); |
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1262 } |
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1263 } |
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1264 } else { |
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1265 // The virtual space expanded, get a new chunk |
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1266 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1267 assert(next != NULL, "Just expanded, should succeed"); |
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1268 } |
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1269 } |
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1270 |
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1271 return next; |
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1272 } |
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1273 |
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1274 void VirtualSpaceList::print_on(outputStream* st) const { |
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1275 if (TraceMetadataChunkAllocation && Verbose) { |
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1276 VirtualSpaceListIterator iter(virtual_space_list()); |
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1277 while (iter.repeat()) { |
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1278 VirtualSpaceNode* node = iter.get_next(); |
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1279 node->print_on(st); |
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1280 } |
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1281 } |
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1282 } |
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1283 |
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1284 #ifndef PRODUCT |
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1285 bool VirtualSpaceList::contains(const void *ptr) { |
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1286 VirtualSpaceNode* list = virtual_space_list(); |
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1287 VirtualSpaceListIterator iter(list); |
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1288 while (iter.repeat()) { |
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1289 VirtualSpaceNode* node = iter.get_next(); |
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1290 if (node->reserved()->contains(ptr)) { |
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1291 return true; |
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1292 } |
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1293 } |
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1294 return false; |
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1295 } |
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1296 #endif // PRODUCT |
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1297 |
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1298 |
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1299 // MetaspaceGC methods |
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1300 |
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1301 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1302 // Within the VM operation after the GC the attempt to allocate the metadata |
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1303 // should succeed. If the GC did not free enough space for the metaspace |
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1304 // allocation, the HWM is increased so that another virtualspace will be |
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1305 // allocated for the metadata. With perm gen the increase in the perm |
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1306 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1307 // metaspace policy uses those as the small and large steps for the HWM. |
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1308 // |
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1309 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1310 // resize the capacity of the metaspaces. The current implementation |
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1311 // is based on the flags MinHeapFreeRatio and MaxHeapFreeRatio used |
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1312 // to resize the Java heap by some GC's. New flags can be implemented |
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1313 // if really needed. MinHeapFreeRatio is used to calculate how much |
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1314 // free space is desirable in the metaspace capacity to decide how much |
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1315 // to increase the HWM. MaxHeapFreeRatio is used to decide how much |
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1316 // free space is desirable in the metaspace capacity before decreasing |
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1317 // the HWM. |
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1318 |
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1319 // Calculate the amount to increase the high water mark (HWM). |
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1320 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1321 // another expansion is not requested too soon. If that is not |
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1322 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1323 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1324 // not enough, expand by the size of the allocation (word_size) plus |
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1325 // some. |
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1326 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1327 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1328 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1329 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1330 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1331 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1332 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1333 if (delta_words > min_delta_words) { |
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1334 // Don't want to hit the high water mark on the next |
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1335 // allocation so make the delta greater than just enough |
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1336 // for this allocation. |
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1337 delta_words = MAX2(delta_words, max_delta_words); |
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1338 if (delta_words > max_delta_words) { |
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1339 // This allocation is large but the next ones are probably not |
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1340 // so increase by the minimum. |
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1341 delta_words = delta_words + min_delta_words; |
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1342 } |
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1343 } |
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1344 return delta_words; |
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1345 } |
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1346 |
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1347 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
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1348 |
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1349 // Class virtual space should always be expanded. Call GC for the other |
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1350 // metadata virtual space. |
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1351 if (vsl == Metaspace::class_space_list()) return true; |
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1352 |
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1353 // If the user wants a limit, impose one. |
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1354 size_t max_metaspace_size_words = MaxMetaspaceSize / BytesPerWord; |
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1355 size_t metaspace_size_words = MetaspaceSize / BytesPerWord; |
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1356 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize) && |
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1357 vsl->capacity_words_sum() >= max_metaspace_size_words) { |
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1358 return false; |
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|
1359 } |
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1360 |
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1361 // If this is part of an allocation after a GC, expand |
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1362 // unconditionally. |
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1363 if(MetaspaceGC::expand_after_GC()) { |
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1364 return true; |
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1365 } |
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1366 |
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1367 // If the capacity is below the minimum capacity, allow the |
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1368 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1369 // to that minimum capacity so that a GC will not be induced |
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1370 // until that minimum capacity is exceeded. |
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1371 if (vsl->capacity_words_sum() < metaspace_size_words || |
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1372 capacity_until_GC() == 0) { |
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1373 set_capacity_until_GC(metaspace_size_words); |
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1374 return true; |
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1375 } else { |
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1376 if (vsl->capacity_words_sum() < capacity_until_GC()) { |
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1377 return true; |
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1378 } else { |
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1379 if (TraceMetadataChunkAllocation && Verbose) { |
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1380 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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1381 " capacity_until_GC " SIZE_FORMAT |
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1382 " capacity_words_sum " SIZE_FORMAT |
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1383 " used_words_sum " SIZE_FORMAT |
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1384 " free chunks " SIZE_FORMAT |
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1385 " free chunks count %d", |
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1386 word_size, |
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1387 capacity_until_GC(), |
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1388 vsl->capacity_words_sum(), |
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1389 vsl->used_words_sum(), |
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1390 vsl->chunk_manager()->free_chunks_total(), |
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1391 vsl->chunk_manager()->free_chunks_count()); |
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1392 } |
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1393 return false; |
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1394 } |
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1395 } |
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1396 } |
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|
1397 |
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1398 // Variables are in bytes |
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1399 |
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1400 void MetaspaceGC::compute_new_size() { |
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1401 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1402 uint current_shrink_factor = _shrink_factor; |
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1403 _shrink_factor = 0; |
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1404 |
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1405 VirtualSpaceList *vsl = Metaspace::space_list(); |
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1406 |
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1407 size_t capacity_after_gc = vsl->capacity_bytes_sum(); |
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1408 // Check to see if these two can be calculated without walking the CLDG |
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1409 size_t used_after_gc = vsl->used_bytes_sum(); |
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1410 size_t capacity_until_GC = vsl->capacity_bytes_sum(); |
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1411 size_t free_after_gc = capacity_until_GC - used_after_gc; |
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1412 |
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1413 const double minimum_free_percentage = MinHeapFreeRatio / 100.0; |
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1414 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1415 |
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1416 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1417 size_t minimum_desired_capacity = |
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1418 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1419 // Don't shrink less than the initial generation size |
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1420 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1421 MetaspaceSize); |
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1422 |
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1423 if (PrintGCDetails && Verbose) { |
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1424 const double free_percentage = ((double)free_after_gc) / capacity_until_GC; |
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1425 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1426 gclog_or_tty->print_cr(" " |
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|
1427 " minimum_free_percentage: %6.2f" |
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1428 " maximum_used_percentage: %6.2f", |
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|
1429 minimum_free_percentage, |
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1430 maximum_used_percentage); |
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1431 double d_free_after_gc = free_after_gc / (double) K; |
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1432 gclog_or_tty->print_cr(" " |
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1433 " free_after_gc : %6.1fK" |
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|
1434 " used_after_gc : %6.1fK" |
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1435 " capacity_after_gc : %6.1fK" |
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|
1436 " metaspace HWM : %6.1fK", |
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|
1437 free_after_gc / (double) K, |
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|
1438 used_after_gc / (double) K, |
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|
1439 capacity_after_gc / (double) K, |
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|
1440 capacity_until_GC / (double) K); |
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|
1441 gclog_or_tty->print_cr(" " |
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|
1442 " free_percentage: %6.2f", |
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|
1443 free_percentage); |
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|
1444 } |
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|
1445 |
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1446 |
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1447 if (capacity_until_GC < minimum_desired_capacity) { |
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1448 // If we have less capacity below the metaspace HWM, then |
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1449 // increment the HWM. |
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1450 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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|
1451 // Don't expand unless it's significant |
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1452 if (expand_bytes >= MinMetaspaceExpansion) { |
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|
1453 size_t expand_words = expand_bytes / BytesPerWord; |
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1454 MetaspaceGC::inc_capacity_until_GC(expand_words); |
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|
1455 } |
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|
1456 if (PrintGCDetails && Verbose) { |
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1457 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
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|
1458 gclog_or_tty->print_cr(" expanding:" |
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|
1459 " minimum_desired_capacity: %6.1fK" |
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|
1460 " expand_words: %6.1fK" |
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|
1461 " MinMetaspaceExpansion: %6.1fK" |
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|
1462 " new metaspace HWM: %6.1fK", |
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|
1463 minimum_desired_capacity / (double) K, |
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|
1464 expand_bytes / (double) K, |
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|
1465 MinMetaspaceExpansion / (double) K, |
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|
1466 new_capacity_until_GC / (double) K); |
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|
1467 } |
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|
1468 return; |
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|
1469 } |
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|
1470 |
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1471 // No expansion, now see if we want to shrink |
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1472 size_t shrink_words = 0; |
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1473 // We would never want to shrink more than this |
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1474 size_t max_shrink_words = capacity_until_GC - minimum_desired_capacity; |
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1475 assert(max_shrink_words >= 0, err_msg("max_shrink_words " SIZE_FORMAT, |
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|
1476 max_shrink_words)); |
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|
1477 |
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1478 // Should shrinking be considered? |
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|
1479 if (MaxHeapFreeRatio < 100) { |
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|
1480 const double maximum_free_percentage = MaxHeapFreeRatio / 100.0; |
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1481 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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|
1482 const double max_tmp = used_after_gc / minimum_used_percentage; |
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|
1483 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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|
1484 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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|
1485 MetaspaceSize); |
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|
1486 if (PrintGC && Verbose) { |
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|
1487 gclog_or_tty->print_cr(" " |
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1488 " maximum_free_percentage: %6.2f" |
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diff
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|
1489 " minimum_used_percentage: %6.2f", |
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coleenp
parents:
diff
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|
1490 maximum_free_percentage, |
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diff
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|
1491 minimum_used_percentage); |
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coleenp
parents:
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1492 gclog_or_tty->print_cr(" " |
da91efe96a93
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parents:
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|
1493 " capacity_until_GC: %6.1fK" |
da91efe96a93
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parents:
diff
changeset
|
1494 " minimum_desired_capacity: %6.1fK" |
da91efe96a93
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parents:
diff
changeset
|
1495 " maximum_desired_capacity: %6.1fK", |
da91efe96a93
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coleenp
parents:
diff
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|
1496 capacity_until_GC / (double) K, |
da91efe96a93
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coleenp
parents:
diff
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|
1497 minimum_desired_capacity / (double) K, |
da91efe96a93
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coleenp
parents:
diff
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|
1498 maximum_desired_capacity / (double) K); |
da91efe96a93
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parents:
diff
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|
1499 } |
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1500 |
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1501 assert(minimum_desired_capacity <= maximum_desired_capacity, |
da91efe96a93
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parents:
diff
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|
1502 "sanity check"); |
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|
1503 |
da91efe96a93
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parents:
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|
1504 if (capacity_until_GC > maximum_desired_capacity) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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|
1505 // Capacity too large, compute shrinking size |
da91efe96a93
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diff
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|
1506 shrink_words = capacity_until_GC - maximum_desired_capacity; |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
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|
1507 // We don't want shrink all the way back to initSize if people call |
da91efe96a93
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diff
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|
1508 // System.gc(), because some programs do that between "phases" and then |
da91efe96a93
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parents:
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|
1509 // we'd just have to grow the heap up again for the next phase. So we |
da91efe96a93
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1510 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1511 // on the third call, and 100% by the fourth call. But if we recompute |
da91efe96a93
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coleenp
parents:
diff
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|
1512 // size without shrinking, it goes back to 0%. |
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|
1513 shrink_words = shrink_words / 100 * current_shrink_factor; |
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parents:
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|
1514 assert(shrink_words <= max_shrink_words, |
da91efe96a93
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1515 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
da91efe96a93
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coleenp
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|
1516 shrink_words, max_shrink_words)); |
da91efe96a93
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parents:
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|
1517 if (current_shrink_factor == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1518 _shrink_factor = 10; |
da91efe96a93
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|
1519 } else { |
da91efe96a93
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1520 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
da91efe96a93
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|
1521 } |
da91efe96a93
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parents:
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|
1522 if (PrintGCDetails && Verbose) { |
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parents:
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|
1523 gclog_or_tty->print_cr(" " |
da91efe96a93
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parents:
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|
1524 " shrinking:" |
da91efe96a93
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parents:
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|
1525 " initSize: %.1fK" |
da91efe96a93
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parents:
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|
1526 " maximum_desired_capacity: %.1fK", |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1527 MetaspaceSize / (double) K, |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1528 maximum_desired_capacity / (double) K); |
da91efe96a93
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coleenp
parents:
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changeset
|
1529 gclog_or_tty->print_cr(" " |
da91efe96a93
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coleenp
parents:
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changeset
|
1530 " shrink_words: %.1fK" |
da91efe96a93
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coleenp
parents:
diff
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|
1531 " current_shrink_factor: %d" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1532 " new shrink factor: %d" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1533 " MinMetaspaceExpansion: %.1fK", |
da91efe96a93
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coleenp
parents:
diff
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|
1534 shrink_words / (double) K, |
da91efe96a93
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coleenp
parents:
diff
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|
1535 current_shrink_factor, |
da91efe96a93
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coleenp
parents:
diff
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|
1536 _shrink_factor, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1537 MinMetaspaceExpansion / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1538 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1539 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1540 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1541 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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changeset
|
1542 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1543 // Don't shrink unless it's significant |
da91efe96a93
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coleenp
parents:
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|
1544 if (shrink_words >= MinMetaspaceExpansion) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1545 VirtualSpaceNode* csp = vsl->current_virtual_space(); |
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coleenp
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|
1546 size_t available_to_shrink = csp->capacity_words_in_vs() - |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1547 csp->used_words_in_vs(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1548 shrink_words = MIN2(shrink_words, available_to_shrink); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1549 csp->shrink_by(shrink_words); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1550 MetaspaceGC::dec_capacity_until_GC(shrink_words); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1551 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1552 size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1553 gclog_or_tty->print_cr(" metaspace HWM: %.1fK", new_capacity_until_GC / (double) K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1554 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1555 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1556 assert(vsl->used_bytes_sum() == used_after_gc && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1557 used_after_gc <= vsl->capacity_bytes_sum(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1558 "sanity check"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1559 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1560 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1561 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1562 // Metadebug methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1563 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1564 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1565 size_t chunk_word_size){ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1566 #ifdef ASSERT |
da91efe96a93
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coleenp
parents:
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changeset
|
1567 VirtualSpaceList* vsl = sm->vs_list(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1568 if (MetaDataDeallocateALot && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1569 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1570 Metadebug::reset_deallocate_chunk_a_lot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
1571 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1572 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1573 if (dummy_chunk == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1574 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1575 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1576 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1577 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1578 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1579 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
1580 sm->sum_count_in_chunks_in_use()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1581 dummy_chunk->print_on(gclog_or_tty); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1582 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1583 vsl->chunk_manager()->free_chunks_total(), |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1584 vsl->chunk_manager()->free_chunks_count()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1585 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1586 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1587 } else { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1588 Metadebug::inc_deallocate_chunk_a_lot_count(); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1589 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1590 #endif |
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coleenp
parents:
diff
changeset
|
1591 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1592 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1593 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
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coleenp
parents:
diff
changeset
|
1594 size_t raw_word_size){ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1595 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1596 if (MetaDataDeallocateALot && |
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coleenp
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diff
changeset
|
1597 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1598 Metadebug::set_deallocate_block_a_lot_count(0); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1599 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
da91efe96a93
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|
1600 Metablock* dummy_block = sm->allocate_work(raw_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1601 if (dummy_block == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1602 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1603 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1604 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1605 assert(dummy_block->word_size() == raw_word_size, "Block size is not set correctly"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1606 #endif |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1607 sm->deallocate(dummy_block->data()); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1608 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1609 } else { |
da91efe96a93
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diff
changeset
|
1610 Metadebug::inc_deallocate_block_a_lot_count(); |
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coleenp
parents:
diff
changeset
|
1611 } |
da91efe96a93
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parents:
diff
changeset
|
1612 #endif |
da91efe96a93
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parents:
diff
changeset
|
1613 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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changeset
|
1614 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1615 void Metadebug::init_allocation_fail_alot_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1616 if (MetadataAllocationFailALot) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
1617 _allocation_fail_alot_count = |
da91efe96a93
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parents:
diff
changeset
|
1618 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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|
1619 } |
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parents:
diff
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|
1620 } |
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parents:
diff
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|
1621 |
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|
1622 #ifdef ASSERT |
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parents:
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|
1623 bool Metadebug::test_metadata_failure() { |
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parents:
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|
1624 if (MetadataAllocationFailALot && |
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coleenp
parents:
diff
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|
1625 Threads::is_vm_complete()) { |
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parents:
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|
1626 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
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coleenp
parents:
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|
1627 _allocation_fail_alot_count--; |
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parents:
diff
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|
1628 } else { |
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|
1629 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1630 gclog_or_tty->print_cr("Metadata allocation failing for " |
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parents:
diff
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|
1631 "MetadataAllocationFailALot"); |
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parents:
diff
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|
1632 } |
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parents:
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|
1633 init_allocation_fail_alot_count(); |
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|
1634 return true; |
da91efe96a93
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parents:
diff
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|
1635 } |
da91efe96a93
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coleenp
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diff
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|
1636 } |
da91efe96a93
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diff
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|
1637 return false; |
da91efe96a93
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parents:
diff
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|
1638 } |
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diff
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|
1639 #endif |
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|
1640 |
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|
1641 // ChunkList methods |
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|
1642 |
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1643 size_t ChunkList::sum_list_size() { |
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|
1644 size_t result = 0; |
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|
1645 Metachunk* cur = head(); |
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|
1646 while (cur != NULL) { |
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|
1647 result += cur->word_size(); |
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|
1648 cur = cur->next(); |
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|
1649 } |
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|
1650 return result; |
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parents:
diff
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|
1651 } |
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|
1652 |
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|
1653 size_t ChunkList::sum_list_count() { |
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|
1654 size_t result = 0; |
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|
1655 Metachunk* cur = head(); |
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|
1656 while (cur != NULL) { |
da91efe96a93
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parents:
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|
1657 result++; |
da91efe96a93
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|
1658 cur = cur->next(); |
da91efe96a93
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diff
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|
1659 } |
da91efe96a93
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parents:
diff
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|
1660 return result; |
da91efe96a93
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parents:
diff
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|
1661 } |
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|
1662 |
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|
1663 size_t ChunkList::sum_list_capacity() { |
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|
1664 size_t result = 0; |
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|
1665 Metachunk* cur = head(); |
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|
1666 while (cur != NULL) { |
da91efe96a93
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|
1667 result += cur->capacity_word_size(); |
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|
1668 cur = cur->next(); |
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diff
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|
1669 } |
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diff
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|
1670 return result; |
da91efe96a93
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parents:
diff
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|
1671 } |
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|
1672 |
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|
1673 void ChunkList::add_at_head(Metachunk* head, Metachunk* tail) { |
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|
1674 assert_lock_strong(SpaceManager::expand_lock()); |
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|
1675 assert(tail->next() == NULL, "Not the tail"); |
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|
1676 |
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|
1677 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1678 tty->print("ChunkList::add_at_head: "); |
da91efe96a93
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diff
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|
1679 Metachunk* cur = head; |
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diff
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|
1680 while (cur != NULL) { |
da91efe96a93
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|
1681 tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", cur, cur->word_size()); |
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|
1682 cur = cur->next(); |
da91efe96a93
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diff
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|
1683 } |
da91efe96a93
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coleenp
parents:
diff
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|
1684 tty->print_cr(""); |
da91efe96a93
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coleenp
parents:
diff
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|
1685 } |
da91efe96a93
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coleenp
parents:
diff
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|
1686 |
da91efe96a93
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|
1687 if (tail != NULL) { |
da91efe96a93
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parents:
diff
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|
1688 tail->set_next(_head); |
da91efe96a93
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parents:
diff
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|
1689 } |
da91efe96a93
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parents:
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|
1690 set_head(head); |
da91efe96a93
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coleenp
parents:
diff
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|
1691 } |
da91efe96a93
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parents:
diff
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|
1692 |
da91efe96a93
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|
1693 void ChunkList::add_at_head(Metachunk* list) { |
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parents:
diff
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|
1694 if (list == NULL) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1695 // Nothing to add |
da91efe96a93
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coleenp
parents:
diff
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|
1696 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1697 } |
da91efe96a93
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|
1698 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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diff
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|
1699 Metachunk* head = list; |
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diff
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|
1700 Metachunk* tail = list; |
da91efe96a93
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|
1701 Metachunk* cur = head->next(); |
da91efe96a93
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coleenp
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diff
changeset
|
1702 // Search for the tail since it is not passed. |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1703 while (cur != NULL) { |
da91efe96a93
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coleenp
parents:
diff
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|
1704 tail = cur; |
da91efe96a93
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|
1705 cur = cur->next(); |
da91efe96a93
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coleenp
parents:
diff
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|
1706 } |
da91efe96a93
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coleenp
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diff
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|
1707 add_at_head(head, tail); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1708 } |
da91efe96a93
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diff
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|
1709 |
da91efe96a93
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|
1710 // ChunkManager methods |
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|
1711 |
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|
1712 // Verification of _free_chunks_total and _free_chunks_count does not |
da91efe96a93
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|
1713 // work with the CMS collector because its use of additional locks |
da91efe96a93
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|
1714 // complicate the mutex deadlock detection but it can still be useful |
da91efe96a93
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coleenp
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diff
changeset
|
1715 // for detecting errors in the chunk accounting with other collectors. |
da91efe96a93
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diff
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|
1716 |
da91efe96a93
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|
1717 size_t ChunkManager::free_chunks_total() { |
da91efe96a93
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diff
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|
1718 #ifdef ASSERT |
da91efe96a93
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diff
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|
1719 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
da91efe96a93
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|
1720 MutexLockerEx cl(SpaceManager::expand_lock(), |
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|
1721 Mutex::_no_safepoint_check_flag); |
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diff
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|
1722 locked_verify_free_chunks_total(); |
da91efe96a93
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coleenp
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diff
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|
1723 } |
da91efe96a93
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coleenp
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diff
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|
1724 #endif |
da91efe96a93
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coleenp
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diff
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|
1725 return _free_chunks_total; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1726 } |
da91efe96a93
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coleenp
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diff
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|
1727 |
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|
1728 size_t ChunkManager::free_chunks_total_in_bytes() { |
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diff
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|
1729 return free_chunks_total() * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1730 } |
da91efe96a93
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coleenp
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diff
changeset
|
1731 |
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|
1732 size_t ChunkManager::free_chunks_count() { |
da91efe96a93
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diff
changeset
|
1733 #ifdef ASSERT |
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diff
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|
1734 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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|
1735 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
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|
1736 Mutex::_no_safepoint_check_flag); |
da91efe96a93
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coleenp
parents:
diff
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|
1737 // This lock is only needed in debug because the verification |
da91efe96a93
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|
1738 // of the _free_chunks_totals walks the list of free chunks |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1739 locked_verify_free_chunks_count(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1740 } |
da91efe96a93
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coleenp
parents:
diff
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|
1741 #endif |
da91efe96a93
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coleenp
parents:
diff
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|
1742 return _free_chunks_count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1743 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1744 |
da91efe96a93
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|
1745 void ChunkManager::locked_verify_free_chunks_total() { |
da91efe96a93
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|
1746 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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parents:
diff
changeset
|
1747 assert(sum_free_chunks() == _free_chunks_total, |
da91efe96a93
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diff
changeset
|
1748 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1749 " same as sum " SIZE_FORMAT, _free_chunks_total, |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1750 sum_free_chunks())); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1751 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1752 |
da91efe96a93
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diff
changeset
|
1753 void ChunkManager::verify_free_chunks_total() { |
da91efe96a93
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changeset
|
1754 MutexLockerEx cl(SpaceManager::expand_lock(), |
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diff
changeset
|
1755 Mutex::_no_safepoint_check_flag); |
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1756 locked_verify_free_chunks_total(); |
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1757 } |
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1758 |
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1759 void ChunkManager::locked_verify_free_chunks_count() { |
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1760 assert_lock_strong(SpaceManager::expand_lock()); |
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1761 assert(sum_free_chunks_count() == _free_chunks_count, |
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1762 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1763 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1764 sum_free_chunks_count())); |
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1765 } |
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1766 |
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1767 void ChunkManager::verify_free_chunks_count() { |
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1768 #ifdef ASSERT |
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1769 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1770 Mutex::_no_safepoint_check_flag); |
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1771 locked_verify_free_chunks_count(); |
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1772 #endif |
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1773 } |
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1774 |
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1775 void ChunkManager::verify() { |
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1776 #ifdef ASSERT |
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1777 if (!UseConcMarkSweepGC) { |
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1778 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1779 Mutex::_no_safepoint_check_flag); |
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1780 locked_verify_free_chunks_total(); |
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1781 locked_verify_free_chunks_count(); |
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1782 } |
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1783 #endif |
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1784 } |
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1785 |
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1786 void ChunkManager::locked_verify() { |
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1787 locked_verify_free_chunks_total(); |
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1788 locked_verify_free_chunks_count(); |
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1789 } |
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1790 |
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1791 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1792 assert_lock_strong(SpaceManager::expand_lock()); |
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1793 st->print_cr("Free chunk total 0x%x count 0x%x", |
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1794 _free_chunks_total, _free_chunks_count); |
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1795 } |
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1796 |
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1797 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1798 assert_lock_strong(SpaceManager::expand_lock()); |
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1799 st->print_cr("Sum free chunk total 0x%x count 0x%x", |
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1800 sum_free_chunks(), sum_free_chunks_count()); |
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1801 } |
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1802 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1803 return &_free_chunks[index]; |
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1804 } |
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1805 |
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1806 |
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1807 // These methods that sum the free chunk lists are used in printing |
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1808 // methods that are used in product builds. |
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1809 size_t ChunkManager::sum_free_chunks() { |
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1810 assert_lock_strong(SpaceManager::expand_lock()); |
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1811 size_t result = 0; |
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1812 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1813 ChunkList* list = free_chunks(i); |
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1814 |
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1815 if (list == NULL) { |
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1816 continue; |
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1817 } |
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1818 |
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1819 result = result + list->sum_list_capacity(); |
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1820 } |
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1821 return result; |
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1822 } |
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1823 |
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1824 size_t ChunkManager::sum_free_chunks_count() { |
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1825 assert_lock_strong(SpaceManager::expand_lock()); |
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1826 size_t count = 0; |
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1827 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1828 ChunkList* list = free_chunks(i); |
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1829 if (list == NULL) { |
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1830 continue; |
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1831 } |
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1832 count = count + list->sum_list_count(); |
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1833 } |
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1834 return count; |
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1835 } |
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1836 |
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1837 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1838 switch (word_size) { |
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1839 case SpaceManager::SmallChunk : |
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1840 return &_free_chunks[0]; |
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1841 case SpaceManager::MediumChunk : |
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1842 return &_free_chunks[1]; |
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1843 default: |
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1844 assert(word_size > SpaceManager::MediumChunk, "List inconsistency"); |
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1845 return &_free_chunks[2]; |
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1846 } |
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1847 } |
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1848 |
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1849 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1850 assert_lock_strong(SpaceManager::expand_lock()); |
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1851 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1852 chunk->set_next(free_list->head()); |
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1853 free_list->set_head(chunk); |
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1854 // chunk is being returned to the chunk free list |
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1855 inc_free_chunks_total(chunk->capacity_word_size()); |
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1856 locked_verify(); |
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1857 } |
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1858 |
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1859 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1860 // The deallocation of a chunk originates in the freelist |
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1861 // manangement code for a Metaspace and does not hold the |
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1862 // lock. |
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1863 assert(chunk != NULL, "Deallocating NULL"); |
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1864 // MutexLockerEx fcl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1865 locked_verify(); |
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1866 if (TraceMetadataChunkAllocation) { |
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1867 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1868 PTR_FORMAT " size " SIZE_FORMAT, |
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1869 chunk, chunk->word_size()); |
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1870 } |
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1871 free_chunks_put(chunk); |
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1872 } |
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1873 |
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1874 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1875 assert_lock_strong(SpaceManager::expand_lock()); |
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1876 |
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1877 locked_verify(); |
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1878 ChunkList* free_list = find_free_chunks_list(word_size); |
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1879 assert(free_list != NULL, "Sanity check"); |
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1880 |
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1881 Metachunk* chunk = free_list->head(); |
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1882 debug_only(Metachunk* debug_head = chunk;) |
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1883 |
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1884 if (chunk == NULL) { |
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1885 return NULL; |
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1886 } |
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1887 |
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1888 Metachunk* prev_chunk = chunk; |
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1889 if (chunk->word_size() == word_size) { |
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1890 // Chunk is being removed from the chunks free list. |
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1891 dec_free_chunks_total(chunk->capacity_word_size()); |
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1892 // Remove the chunk as the head of the list. |
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1893 free_list->set_head(chunk->next()); |
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1894 chunk->set_next(NULL); |
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1895 |
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1896 if (TraceMetadataChunkAllocation && Verbose) { |
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1897 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1898 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1899 free_list, chunk, chunk->word_size()); |
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1900 } |
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1901 } else { |
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1902 assert(SpaceManager::is_humongous(word_size), |
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1903 "Should only need to check humongous"); |
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1904 // This code to find the best fit is just for purposes of |
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1905 // investigating the loss due to fragmentation on a humongous |
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1906 // chunk. It will be replace by a binaryTreeDictionary for |
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1907 // the humongous chunks. |
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1908 uint count = 0; |
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1909 Metachunk* best_fit = NULL; |
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1910 Metachunk* best_fit_prev = NULL; |
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1911 while (chunk != NULL) { |
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1912 count++; |
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1913 if (chunk->word_size() < word_size) { |
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1914 prev_chunk = chunk; |
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1915 chunk = chunk->next(); |
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1916 } else if (chunk->word_size() == word_size) { |
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1917 break; |
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1918 } else { |
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1919 if (best_fit == NULL || |
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1920 best_fit->word_size() > chunk->word_size()) { |
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1921 best_fit_prev = prev_chunk; |
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1922 best_fit = chunk; |
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1923 } |
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1924 prev_chunk = chunk; |
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1925 chunk = chunk->next(); |
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1926 } |
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1927 } |
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1928 if (chunk == NULL) { |
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1929 prev_chunk = best_fit_prev; |
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1930 chunk = best_fit; |
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1931 } |
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1932 if (chunk != NULL) { |
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1933 if (TraceMetadataHumongousAllocation) { |
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1934 size_t waste = chunk->word_size() - word_size; |
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1935 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT |
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1936 " for requested size " SIZE_FORMAT |
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1937 " waste " SIZE_FORMAT |
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1938 " found at " SIZE_FORMAT " of " SIZE_FORMAT, |
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1939 chunk->word_size(), word_size, waste, |
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1940 count, free_list->sum_list_count()); |
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1941 } |
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1942 // Chunk is being removed from the chunks free list. |
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1943 dec_free_chunks_total(chunk->capacity_word_size()); |
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1944 // Remove the chunk if it is at the head of the list. |
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1945 if (chunk == free_list->head()) { |
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1946 free_list->set_head(chunk->next()); |
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1947 |
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1948 if (TraceMetadataHumongousAllocation) { |
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1949 tty->print_cr("ChunkManager::free_chunks_get: humongous free_list " |
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1950 PTR_FORMAT " chunk " PTR_FORMAT " size " SIZE_FORMAT |
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1951 " new head " PTR_FORMAT, |
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1952 free_list, chunk, chunk->word_size(), |
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1953 free_list->head()); |
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1954 } |
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1955 } else { |
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1956 // Remove a chunk in the interior of the list |
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1957 prev_chunk->set_next(chunk->next()); |
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1958 |
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1959 if (TraceMetadataHumongousAllocation) { |
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1960 tty->print_cr("ChunkManager::free_chunks_get: humongous free_list " |
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1961 PTR_FORMAT " chunk " PTR_FORMAT " size " SIZE_FORMAT |
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1962 PTR_FORMAT " prev " PTR_FORMAT " next " PTR_FORMAT, |
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1963 free_list, chunk, chunk->word_size(), |
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1964 prev_chunk, chunk->next()); |
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1965 } |
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1966 } |
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1967 chunk->set_next(NULL); |
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1968 } else { |
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1969 if (TraceMetadataHumongousAllocation) { |
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1970 tty->print_cr("ChunkManager::free_chunks_get: New humongous chunk of size " |
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1971 SIZE_FORMAT, |
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1972 word_size); |
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1973 } |
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1974 } |
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1975 } |
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1976 locked_verify(); |
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1977 return chunk; |
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1978 } |
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1979 |
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1980 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1981 assert_lock_strong(SpaceManager::expand_lock()); |
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1982 locked_verify(); |
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1983 |
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1984 // Take from the beginning of the list |
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1985 Metachunk* chunk = free_chunks_get(word_size); |
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1986 if (chunk == NULL) { |
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1987 return NULL; |
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1988 } |
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1989 |
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1990 assert(word_size <= chunk->word_size() || |
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1991 SpaceManager::is_humongous(chunk->word_size()), |
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1992 "Non-humongous variable sized chunk"); |
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1993 if (TraceMetadataChunkAllocation) { |
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1994 tty->print("ChunkManager::chunk_freelist_allocate: chunk " |
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1995 PTR_FORMAT " size " SIZE_FORMAT " ", |
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1996 chunk, chunk->word_size()); |
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1997 locked_print_free_chunks(tty); |
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1998 } |
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1999 |
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2000 return chunk; |
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2001 } |
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2002 |
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2003 // SpaceManager methods |
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2004 |
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2005 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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2006 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2007 size_t free = 0; |
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2008 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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2009 Metachunk* chunk = chunks_in_use(i); |
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2010 while (chunk != NULL) { |
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2011 free += chunk->free_word_size(); |
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2012 chunk = chunk->next(); |
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2013 } |
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2014 } |
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2015 return free; |
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2016 } |
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2017 |
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2018 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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2019 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2020 size_t result = 0; |
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2021 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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2022 // Count the free space in all the chunk but not the |
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2023 // current chunk from which allocations are still being done. |
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2024 result += sum_waste_in_chunks_in_use(i); |
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|
2025 } |
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parents:
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|
2026 return result; |
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parents:
diff
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|
2027 } |
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parents:
diff
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|
2028 |
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|
2029 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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diff
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|
2030 size_t result = 0; |
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diff
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|
2031 size_t count = 0; |
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|
2032 Metachunk* chunk = chunks_in_use(index); |
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|
2033 // Count the free space in all the chunk but not the |
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coleenp
parents:
diff
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|
2034 // current chunk from which allocations are still being done. |
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coleenp
parents:
diff
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|
2035 if (chunk != NULL) { |
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coleenp
parents:
diff
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|
2036 while (chunk != NULL) { |
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parents:
diff
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|
2037 if (chunk != current_chunk()) { |
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parents:
diff
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|
2038 result += chunk->free_word_size(); |
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parents:
diff
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|
2039 } |
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parents:
diff
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|
2040 chunk = chunk->next(); |
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parents:
diff
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|
2041 count++; |
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coleenp
parents:
diff
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|
2042 } |
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coleenp
parents:
diff
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|
2043 } |
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coleenp
parents:
diff
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|
2044 return result; |
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parents:
diff
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|
2045 } |
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parents:
diff
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|
2046 |
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|
2047 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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|
2048 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
2049 size_t sum = 0; |
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|
2050 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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|
2051 Metachunk* chunk = chunks_in_use(i); |
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|
2052 while (chunk != NULL) { |
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|
2053 // Just changed this sum += chunk->capacity_word_size(); |
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2054 // sum += chunk->word_size() - Metachunk::overhead(); |
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|
2055 sum += chunk->capacity_word_size(); |
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|
2056 chunk = chunk->next(); |
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diff
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|
2057 } |
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diff
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|
2058 } |
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|
2059 return sum; |
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diff
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|
2060 } |
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|
2061 |
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|
2062 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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|
2063 size_t count = 0; |
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|
2064 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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|
2065 count = count + sum_count_in_chunks_in_use(i); |
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|
2066 } |
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|
2067 return count; |
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diff
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|
2068 } |
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|
2069 |
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|
2070 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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|
2071 size_t count = 0; |
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|
2072 Metachunk* chunk = chunks_in_use(i); |
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|
2073 while (chunk != NULL) { |
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|
2074 count++; |
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|
2075 chunk = chunk->next(); |
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diff
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|
2076 } |
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|
2077 return count; |
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diff
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|
2078 } |
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|
2079 |
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|
2080 |
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|
2081 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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|
2082 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
2083 size_t used = 0; |
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2084 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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|
2085 Metachunk* chunk = chunks_in_use(i); |
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|
2086 while (chunk != NULL) { |
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|
2087 used += chunk->used_word_size(); |
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|
2088 chunk = chunk->next(); |
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diff
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|
2089 } |
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diff
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|
2090 } |
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|
2091 return used; |
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diff
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|
2092 } |
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diff
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|
2093 |
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|
2094 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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|
2095 |
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|
2096 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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|
2097 st->print_cr("SpaceManager: small chunk " PTR_FORMAT |
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|
2098 " free " SIZE_FORMAT, |
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diff
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|
2099 small_chunk, |
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|
2100 small_chunk->free_word_size()); |
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diff
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|
2101 |
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|
2102 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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|
2103 st->print("medium chunk " PTR_FORMAT, medium_chunk); |
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|
2104 Metachunk* tail = current_chunk(); |
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|
2105 st->print_cr(" current chunk " PTR_FORMAT, tail); |
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diff
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|
2106 |
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|
2107 Metachunk* head = chunks_in_use(HumongousIndex); |
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|
2108 st->print_cr("humongous chunk " PTR_FORMAT, head); |
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diff
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|
2109 |
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|
2110 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
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|
2111 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
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diff
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|
2112 } |
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diff
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|
2113 |
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|
2114 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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|
2115 |
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|
2116 // Decide between a small chunk and a medium chunk. Up to |
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diff
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|
2117 // _small_chunk_limit small chunks can be allocated but |
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|
2118 // once a medium chunk has been allocated, no more small |
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diff
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|
2119 // chunks will be allocated. |
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diff
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|
2120 size_t chunk_word_size; |
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|
2121 if (chunks_in_use(MediumIndex) == NULL && |
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|
2122 (!has_small_chunk_limit() || |
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|
2123 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit)) { |
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|
2124 chunk_word_size = (size_t) SpaceManager::SmallChunk; |
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|
2125 if (word_size + Metachunk::overhead() > SpaceManager::SmallChunk) { |
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diff
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|
2126 chunk_word_size = MediumChunk; |
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diff
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|
2127 } |
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diff
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|
2128 } else { |
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|
2129 chunk_word_size = MediumChunk; |
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diff
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|
2130 } |
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diff
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|
2131 |
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diff
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|
2132 // Might still need a humongous chunk |
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|
2133 chunk_word_size = |
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|
2134 MAX2((size_t) chunk_word_size, word_size + Metachunk::overhead()); |
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diff
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|
2135 |
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diff
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|
2136 if (TraceMetadataHumongousAllocation && |
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|
2137 SpaceManager::is_humongous(word_size)) { |
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parents:
diff
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|
2138 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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|
2139 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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|
2140 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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diff
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|
2141 chunk_word_size); |
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|
2142 gclog_or_tty->print_cr(" block overhead " PTR_FORMAT |
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coleenp
parents:
diff
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|
2143 " chunk overhead " PTR_FORMAT, |
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|
2144 Metablock::overhead(), |
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diff
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|
2145 Metachunk::overhead()); |
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parents:
diff
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|
2146 } |
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|
2147 return chunk_word_size; |
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parents:
diff
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|
2148 } |
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diff
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|
2149 |
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|
2150 Metablock* SpaceManager::grow_and_allocate(size_t word_size) { |
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|
2151 assert(vs_list()->current_virtual_space() != NULL, |
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coleenp
parents:
diff
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|
2152 "Should have been set"); |
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coleenp
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diff
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|
2153 assert(current_chunk() == NULL || |
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|
2154 current_chunk()->allocate(word_size) == NULL, |
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|
2155 "Don't need to expand"); |
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|
2156 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
2157 |
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|
2158 if (TraceMetadataChunkAllocation && Verbose) { |
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2159 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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2160 " words " SIZE_FORMAT " space left", |
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2161 word_size, current_chunk() != NULL ? |
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2162 current_chunk()->free_word_size() : 0); |
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2163 } |
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2164 |
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2165 // Get another chunk out of the virtual space |
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2166 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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2167 Metachunk* next = vs_list()->get_new_chunk(word_size, grow_chunks_by_words); |
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2168 |
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2169 // If a chunk was available, add it to the in-use chunk list |
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2170 // and do an allocation from it. |
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2171 if (next != NULL) { |
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2172 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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2173 // Add to this manager's list of chunks in use. |
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2174 add_chunk(next, false); |
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2175 return next->allocate(word_size); |
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2176 } |
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2177 return NULL; |
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2178 } |
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2179 |
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2180 void SpaceManager::print_on(outputStream* st) const { |
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2181 |
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2182 for (ChunkIndex i = SmallIndex; |
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2183 i < NumberOfFreeLists ; |
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2184 i = next_chunk_index(i) ) { |
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2185 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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2186 chunks_in_use(i), |
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2187 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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2188 } |
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2189 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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2190 " Humongous " SIZE_FORMAT, |
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2191 sum_waste_in_chunks_in_use(SmallIndex), |
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2192 sum_waste_in_chunks_in_use(MediumIndex), |
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2193 sum_waste_in_chunks_in_use(HumongousIndex)); |
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2194 // Nothing in them yet |
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2195 // block_freelists()->print_on(st); |
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2196 } |
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2197 |
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2198 SpaceManager::SpaceManager(Mutex* lock, VirtualSpaceList* vs_list) : |
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2199 _vs_list(vs_list), |
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2200 _allocation_total(0), |
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2201 _lock(lock) { |
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2202 Metadebug::init_allocation_fail_alot_count(); |
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2203 for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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2204 _chunks_in_use[i] = NULL; |
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2205 } |
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2206 _current_chunk = NULL; |
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2207 if (TraceMetadataChunkAllocation && Verbose) { |
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2208 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2209 } |
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2210 } |
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2211 |
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2212 SpaceManager::~SpaceManager() { |
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2213 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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2214 Mutex::_no_safepoint_check_flag); |
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2215 |
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2216 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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2217 |
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2218 chunk_manager->locked_verify(); |
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2219 |
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2220 if (TraceMetadataChunkAllocation && Verbose) { |
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2221 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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2222 locked_print_chunks_in_use_on(gclog_or_tty); |
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2223 } |
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2224 |
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2225 // Have to update before the chunks_in_use lists are emptied |
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2226 // below. |
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2227 chunk_manager->inc_free_chunks_total(sum_capacity_in_chunks_in_use(), |
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2228 sum_count_in_chunks_in_use()); |
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2229 |
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2230 #ifdef ASSERT |
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2231 // Mangle freed memory. |
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2232 mangle_freed_chunks(); |
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2233 #endif // ASSERT |
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2234 |
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2235 // Add all the chunks in use by this space manager |
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2236 // to the global list of free chunks. |
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2237 |
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2238 // Small chunks. There is one _current_chunk for each |
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2239 // Metaspace. It could point to a small or medium chunk. |
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2240 // Rather than determine which it is, follow the list of |
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2241 // small chunks to add them to the free list |
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2242 Metachunk* small_chunk = chunks_in_use(SmallIndex); |
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2243 chunk_manager->free_small_chunks()->add_at_head(small_chunk); |
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2244 set_chunks_in_use(SmallIndex, NULL); |
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2245 |
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2246 // After the small chunk are the medium chunks |
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2247 Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
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2248 assert(medium_chunk == NULL || |
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2249 medium_chunk->word_size() == MediumChunk, |
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2250 "Chunk is on the wrong list"); |
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2251 |
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2252 if (medium_chunk != NULL) { |
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2253 Metachunk* head = medium_chunk; |
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2254 // If there is a medium chunk then the _current_chunk can only |
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2255 // point to the last medium chunk. |
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2256 Metachunk* tail = current_chunk(); |
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2257 chunk_manager->free_medium_chunks()->add_at_head(head, tail); |
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2258 set_chunks_in_use(MediumIndex, NULL); |
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2259 } |
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2260 |
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2261 // Humongous chunks |
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2262 // Humongous chunks are never the current chunk. |
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2263 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2264 |
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2265 if (humongous_chunks != NULL) { |
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2266 chunk_manager->free_humongous_chunks()->add_at_head(humongous_chunks); |
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2267 set_chunks_in_use(HumongousIndex, NULL); |
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2268 } |
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2269 chunk_manager->locked_verify(); |
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2270 } |
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2271 |
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2272 void SpaceManager::deallocate(MetaWord* p) { |
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2273 assert_lock_strong(_lock); |
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2274 ShouldNotReachHere(); // Where is this needed. |
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2275 #ifdef DEALLOCATE_BLOCKS |
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2276 Metablock* block = Metablock::metablock_from_data(p); |
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2277 // This is expense but kept it until integration JJJ |
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2278 assert(contains((address)block), "Block does not belong to this metaspace"); |
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2279 block_freelists()->return_block(block, word_size); |
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2280 #endif |
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2281 } |
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2282 |
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2283 // Adds a chunk to the list of chunks in use. |
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2284 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2285 |
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2286 assert(new_chunk != NULL, "Should not be NULL"); |
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2287 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2288 |
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2289 new_chunk->reset_empty(); |
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2290 |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2291 // Find the correct list and and set the current |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2292 // chunk for that list. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2293 switch (new_chunk->word_size()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2294 case SpaceManager::SmallChunk : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2295 if (chunks_in_use(SmallIndex) == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2296 // First chunk to add to the list |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2297 set_chunks_in_use(SmallIndex, new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2298 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2299 assert(current_chunk()->word_size() == SpaceManager::SmallChunk, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2300 err_msg( "Incorrect mix of sizes in chunk list " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2301 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2302 current_chunk()->word_size(), new_chunk->word_size())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2303 current_chunk()->set_next(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2304 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2305 // Make current chunk |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2306 set_current_chunk(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2307 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2308 case SpaceManager::MediumChunk : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2309 if (chunks_in_use(MediumIndex) == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2310 // About to add the first medium chunk so teminate the |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2311 // small chunk list. In general once medium chunks are |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2312 // being added, we're past the need for small chunks. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2313 if (current_chunk() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2314 // Only a small chunk or the initial chunk could be |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2315 // the current chunk if this is the first medium chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2316 assert(current_chunk()->word_size() == SpaceManager::SmallChunk || |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2317 chunks_in_use(SmallIndex) == NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2318 err_msg("Should be a small chunk or initial chunk, current chunk " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2319 SIZE_FORMAT " new chunk " SIZE_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2320 current_chunk()->word_size(), new_chunk->word_size())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2321 current_chunk()->set_next(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2322 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2323 // First chunk to add to the list |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2324 set_chunks_in_use(MediumIndex, new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2325 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2326 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2327 // As a minimum the first medium chunk added would |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2328 // have become the _current_chunk |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2329 // so the _current_chunk has to be non-NULL here |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2330 // (although not necessarily still the first medium chunk). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2331 assert(current_chunk()->word_size() == SpaceManager::MediumChunk, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2332 "A medium chunk should the current chunk"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2333 current_chunk()->set_next(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2334 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2335 // Make current chunk |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2336 set_current_chunk(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2337 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2338 default: { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2339 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2340 // small, so small will be null. Link this first chunk as the current |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2341 // chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2342 if (make_current) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2343 // Set as the current chunk but otherwise treat as a humongous chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2344 set_current_chunk(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2345 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2346 // Link at head. The _current_chunk only points to a humongous chunk for |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2347 // the null class loader metaspace (class and data virtual space managers) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2348 // any humongous chunks so will not point to the tail |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2349 // of the humongous chunks list. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2350 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2351 set_chunks_in_use(HumongousIndex, new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2352 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2353 assert(new_chunk->word_size() > MediumChunk, "List inconsistency"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2354 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2355 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2356 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2357 assert(new_chunk->is_empty(), "Not ready for reuse"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2358 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2359 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2360 sum_count_in_chunks_in_use()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2361 new_chunk->print_on(gclog_or_tty); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2362 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2363 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2364 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2365 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2366 MetaWord* SpaceManager::allocate(size_t word_size) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2367 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2368 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2369 size_t block_overhead = Metablock::overhead(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2370 // If only the dictionary is going to be used (i.e., no |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2371 // indexed free list), then there is a minimum size requirement. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2372 // MinChunkSize is a placeholder for the real minimum size JJJ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2373 size_t byte_size_with_overhead = (word_size + block_overhead) * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2374 #ifdef DEALLOCATE_BLOCKS |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2375 size_t raw_bytes_size = MAX2(ARENA_ALIGN(byte_size_with_overhead), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2376 MinChunkSize * BytesPerWord); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2377 #else |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2378 size_t raw_bytes_size = ARENA_ALIGN(byte_size_with_overhead); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2379 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2380 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2381 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2382 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2383 BlockFreelist* fl = block_freelists(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2384 Metablock* block = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2385 // Allocation from the dictionary is expensive in the sense that |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2386 // the dictionary has to be searched for a size. Don't allocate |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2387 // from the dictionary until it starts to get fat. Is this |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2388 // a reasonable policy? Maybe an skinny dictionary is fast enough |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2389 // for allocations. Do some profiling. JJJ |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2390 if (fl->totalSize() > allocation_from_dictionary_limit) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2391 block = fl->get_block(raw_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2392 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2393 if (block == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2394 block = allocate_work(raw_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2395 if (block == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2396 return NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2397 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2398 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2399 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2400 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2401 // Push the allocation past the word containing the size and leader. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2402 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2403 MetaWord* result = block->data(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2404 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2405 #else |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2406 return (MetaWord*) block; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2407 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2408 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2409 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2410 // Returns the address of spaced allocated for "word_size". |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2411 // This methods does not know about blocks (Metablocks) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2412 Metablock* SpaceManager::allocate_work(size_t word_size) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2413 assert_lock_strong(_lock); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2414 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2415 if (Metadebug::test_metadata_failure()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2416 return NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2417 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2418 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2419 // Is there space in the current chunk? |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2420 Metablock* result = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2421 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2422 // For DumpSharedSpaces, only allocate out of the current chunk which is |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2423 // never null because we gave it the size we wanted. Caller reports out |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2424 // of memory if this returns null. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2425 if (DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2426 assert(current_chunk() != NULL, "should never happen"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2427 inc_allocation_total(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2428 return current_chunk()->allocate(word_size); // caller handles null result |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2429 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2430 if (current_chunk() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2431 result = current_chunk()->allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2432 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2433 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2434 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2435 result = grow_and_allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2436 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2437 if (result > 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2438 inc_allocation_total(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2439 assert(result != (Metablock*) chunks_in_use(MediumIndex), "Head of the list is being allocated"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2440 assert(result->word_size() == word_size, "Size not set correctly"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2441 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2442 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2443 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2444 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2445 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2446 void SpaceManager::verify() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2447 // If there are blocks in the dictionary, then |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2448 // verfication of chunks does not work since |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2449 // being in the dictionary alters a chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2450 if (block_freelists()->totalSize() == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2451 // Skip the small chunks because their next link points to |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2452 // medium chunks. This is because the small chunk is the |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2453 // current chunk (for allocations) until it is full and the |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2454 // the addition of the next chunk does not NULL the next |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2455 // like of the small chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2456 for (ChunkIndex i = MediumIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2457 Metachunk* curr = chunks_in_use(i); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2458 while (curr != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2459 curr->verify(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2460 curr = curr->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2461 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2462 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2463 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2464 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2465 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2466 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2467 void SpaceManager::verify_allocation_total() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2468 #if 0 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2469 // Verification is only guaranteed at a safepoint. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2470 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2471 gclog_or_tty->print_cr("Chunk " PTR_FORMAT " allocation_total " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2472 " sum_used_in_chunks_in_use " SIZE_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2473 this, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2474 allocation_total(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2475 sum_used_in_chunks_in_use()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2476 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2477 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2478 assert(allocation_total() == sum_used_in_chunks_in_use(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2479 err_msg("allocation total is not consistent %d vs %d", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2480 allocation_total(), sum_used_in_chunks_in_use())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2481 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2482 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2483 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2484 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2485 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2486 void SpaceManager::dump(outputStream* const out) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2487 size_t curr_total = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2488 size_t waste = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2489 uint i = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2490 size_t used = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2491 size_t capacity = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2492 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2493 // Add up statistics for all chunks in this SpaceManager. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2494 for (ChunkIndex index = SmallIndex; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2495 index < NumberOfFreeLists; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2496 index = next_chunk_index(index)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2497 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2498 curr != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2499 curr = curr->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2500 out->print("%d) ", i++); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2501 curr->print_on(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2502 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2503 block_freelists()->print_on(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2504 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2505 curr_total += curr->word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2506 used += curr->used_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2507 capacity += curr->capacity_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2508 waste += curr->free_word_size() + curr->overhead();; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2509 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2510 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2511 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2512 size_t free = current_chunk()->free_word_size(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2513 // Free space isn't wasted. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2514 waste -= free; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2515 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2516 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2517 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2518 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2519 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2520 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2521 #ifndef PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2522 void SpaceManager::mangle_freed_chunks() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2523 for (ChunkIndex index = SmallIndex; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2524 index < NumberOfFreeLists; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2525 index = next_chunk_index(index)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2526 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2527 curr != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2528 curr = curr->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2529 // Try to detect incorrectly terminated small chunk |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2530 // list. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2531 assert(index == MediumIndex || curr != chunks_in_use(MediumIndex), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2532 err_msg("Mangling medium chunks in small chunks? " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2533 "curr " PTR_FORMAT " medium list " PTR_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2534 curr, chunks_in_use(MediumIndex))); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2535 curr->mangle(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2536 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2537 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2538 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2539 #endif // PRODUCT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2540 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2541 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2542 // MetaspaceAux |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2543 |
6734 | 2544 size_t MetaspaceAux::used_in_bytes(Metaspace::MetadataType mdtype) { |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2545 size_t used = 0; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2546 ClassLoaderDataGraphMetaspaceIterator iter; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2547 while (iter.repeat()) { |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2548 Metaspace* msp = iter.get_next(); |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2549 // Sum allocation_total for each metaspace |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2550 if (msp != NULL) { |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2551 used += msp->used_words(mdtype); |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2552 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2553 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2554 return used * BytesPerWord; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2555 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2556 |
6725
da91efe96a93
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|
2557 size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2558 size_t free = 0; |
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|
2559 ClassLoaderDataGraphMetaspaceIterator iter; |
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diff
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|
2560 while (iter.repeat()) { |
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2561 Metaspace* msp = iter.get_next(); |
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|
2562 if (msp != NULL) { |
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|
2563 free += msp->free_words(mdtype); |
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diff
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|
2564 } |
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diff
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|
2565 } |
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|
2566 return free * BytesPerWord; |
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diff
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|
2567 } |
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|
2568 |
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|
2569 // The total words available for metadata allocation. This |
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|
2570 // uses Metaspace capacity_words() which is the total words |
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2571 // in chunks allocated for a Metaspace. |
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2572 size_t MetaspaceAux::capacity_in_bytes(Metaspace::MetadataType mdtype) { |
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|
2573 size_t capacity = free_chunks_total(mdtype); |
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|
2574 ClassLoaderDataGraphMetaspaceIterator iter; |
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diff
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|
2575 while (iter.repeat()) { |
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2576 Metaspace* msp = iter.get_next(); |
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|
2577 if (msp != NULL) { |
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|
2578 capacity += msp->capacity_words(mdtype); |
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diff
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|
2579 } |
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|
2580 } |
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|
2581 return capacity * BytesPerWord; |
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diff
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|
2582 } |
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|
2583 |
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2584 size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
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2585 size_t reserved = (mdtype == Metaspace::ClassType) ? |
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2586 Metaspace::class_space_list()->virtual_space_total() : |
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2587 Metaspace::space_list()->virtual_space_total(); |
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2588 return reserved * BytesPerWord; |
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diff
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|
2589 } |
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|
2590 |
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2591 size_t MetaspaceAux::min_chunk_size() { return SpaceManager::MediumChunk; } |
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|
2592 |
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2593 size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
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2594 ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
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2595 Metaspace::class_space_list()->chunk_manager() : |
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|
2596 Metaspace::space_list()->chunk_manager(); |
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|
2597 |
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|
2598 chunk->verify_free_chunks_total(); |
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|
2599 return chunk->free_chunks_total(); |
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|
2600 } |
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|
2601 |
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|
2602 size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
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2603 return free_chunks_total(mdtype) * BytesPerWord; |
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|
2604 } |
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|
2605 |
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2606 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
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|
2607 gclog_or_tty->print(", [Metaspace:"); |
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2608 if (PrintGCDetails && Verbose) { |
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|
2609 gclog_or_tty->print(" " SIZE_FORMAT |
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|
2610 "->" SIZE_FORMAT |
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|
2611 "(" SIZE_FORMAT "/" SIZE_FORMAT ")", |
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|
2612 prev_metadata_used, |
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|
2613 used_in_bytes(), |
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|
2614 capacity_in_bytes(), |
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|
2615 reserved_in_bytes()); |
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|
2616 } else { |
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|
2617 gclog_or_tty->print(" " SIZE_FORMAT "K" |
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|
2618 "->" SIZE_FORMAT "K" |
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|
2619 "(" SIZE_FORMAT "K/" SIZE_FORMAT "K)", |
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diff
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|
2620 prev_metadata_used / K, |
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|
2621 used_in_bytes()/ K, |
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|
2622 capacity_in_bytes()/K, |
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|
2623 reserved_in_bytes()/ K); |
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diff
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|
2624 } |
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diff
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|
2625 |
da91efe96a93
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|
2626 gclog_or_tty->print("]"); |
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diff
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|
2627 } |
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diff
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|
2628 |
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|
2629 // This is printed when PrintGCDetails |
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|
2630 void MetaspaceAux::print_on(outputStream* out) { |
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|
2631 Metaspace::MetadataType ct = Metaspace::ClassType; |
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|
2632 Metaspace::MetadataType nct = Metaspace::NonClassType; |
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|
2633 |
da91efe96a93
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|
2634 out->print_cr(" Metaspace total " |
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|
2635 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2636 " reserved " SIZE_FORMAT "K", |
6734 | 2637 capacity_in_bytes()/K, used_in_bytes()/K, reserved_in_bytes()/K); |
6725
da91efe96a93
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coleenp
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|
2638 out->print_cr(" data space " |
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|
2639 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2640 " reserved " SIZE_FORMAT "K", |
6734 | 2641 capacity_in_bytes(nct)/K, used_in_bytes(nct)/K, reserved_in_bytes(nct)/K); |
6725
da91efe96a93
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|
2642 out->print_cr(" class space " |
da91efe96a93
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|
2643 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
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|
2644 " reserved " SIZE_FORMAT "K", |
6734 | 2645 capacity_in_bytes(ct)/K, used_in_bytes(ct)/K, reserved_in_bytes(ct)/K); |
6725
da91efe96a93
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diff
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|
2646 } |
da91efe96a93
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diff
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|
2647 |
da91efe96a93
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coleenp
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|
2648 // Print information for class space and data space separately. |
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coleenp
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diff
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|
2649 // This is almost the same as above. |
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|
2650 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
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|
2651 size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
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|
2652 size_t capacity_bytes = capacity_in_bytes(mdtype); |
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|
2653 size_t used_bytes = used_in_bytes(mdtype); |
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|
2654 size_t free_bytes = free_in_bytes(mdtype); |
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|
2655 size_t used_and_free = used_bytes + free_bytes + |
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|
2656 free_chunks_capacity_bytes; |
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|
2657 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
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|
2658 "K + unused in chunks " SIZE_FORMAT "K + " |
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|
2659 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
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|
2660 "K capacity in allocated chunks " SIZE_FORMAT "K", |
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coleenp
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|
2661 used_bytes / K, |
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diff
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|
2662 free_bytes / K, |
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coleenp
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|
2663 free_chunks_capacity_bytes / K, |
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coleenp
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diff
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|
2664 used_and_free / K, |
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|
2665 capacity_bytes / K); |
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|
2666 assert(used_and_free == capacity_bytes, "Accounting is wrong"); |
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diff
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|
2667 } |
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|
2668 |
da91efe96a93
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coleenp
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|
2669 // Print total fragmentation for class and data metaspaces separately |
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|
2670 void MetaspaceAux::print_waste(outputStream* out) { |
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|
2671 |
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|
2672 size_t small_waste = 0, medium_waste = 0, large_waste = 0; |
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|
2673 size_t cls_small_waste = 0, cls_medium_waste = 0, cls_large_waste = 0; |
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|
2674 |
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|
2675 ClassLoaderDataGraphMetaspaceIterator iter; |
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diff
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|
2676 while (iter.repeat()) { |
da91efe96a93
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|
2677 Metaspace* msp = iter.get_next(); |
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diff
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|
2678 if (msp != NULL) { |
da91efe96a93
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|
2679 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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|
2680 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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|
2681 large_waste += msp->vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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|
2682 |
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coleenp
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|
2683 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
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|
2684 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
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|
2685 cls_large_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
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|
2686 } |
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diff
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|
2687 } |
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2688 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
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2689 out->print(" data: small " SIZE_FORMAT " medium " SIZE_FORMAT, |
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|
2690 small_waste, medium_waste); |
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|
2691 out->print_cr(" class: small " SIZE_FORMAT, cls_small_waste); |
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|
2692 } |
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diff
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|
2693 |
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2694 // Dump global metaspace things from the end of ClassLoaderDataGraph |
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2695 void MetaspaceAux::dump(outputStream* out) { |
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2696 out->print_cr("All Metaspace:"); |
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2697 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
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2698 out->print("class space: "); print_on(out, Metaspace::ClassType); |
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|
2699 print_waste(out); |
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diff
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|
2700 } |
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|
2701 |
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2702 // Metaspace methods |
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2703 |
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2704 size_t Metaspace::_first_chunk_word_size = 0; |
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2705 |
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2706 Metaspace::Metaspace(Mutex* lock, size_t word_size) { |
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2707 initialize(lock, word_size); |
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|
2708 } |
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2709 |
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2710 Metaspace::Metaspace(Mutex* lock) { |
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2711 initialize(lock); |
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2712 } |
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2713 |
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2714 Metaspace::~Metaspace() { |
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2715 delete _vsm; |
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2716 delete _class_vsm; |
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|
2717 } |
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2718 |
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2719 VirtualSpaceList* Metaspace::_space_list = NULL; |
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2720 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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2721 |
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2722 #define VIRTUALSPACEMULTIPLIER 2 |
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2723 |
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2724 void Metaspace::global_initialize() { |
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2725 // Initialize the alignment for shared spaces. |
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2726 int max_alignment = os::vm_page_size(); |
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2727 MetaspaceShared::set_max_alignment(max_alignment); |
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|
2728 |
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2729 if (DumpSharedSpaces) { |
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2730 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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2731 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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2732 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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2733 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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2734 |
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2735 // Initialize with the sum of the shared space sizes. The read-only |
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2736 // and read write metaspace chunks will be allocated out of this and the |
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2737 // remainder is the misc code and data chunks. |
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2738 size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
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|
2739 SharedMiscDataSize + SharedMiscCodeSize, |
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|
2740 os::vm_allocation_granularity()); |
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2741 size_t word_size = total/wordSize; |
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2742 _space_list = new VirtualSpaceList(word_size); |
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2743 } else { |
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2744 // If using shared space, open the file that contains the shared space |
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2745 // and map in the memory before initializing the rest of metaspace (so |
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2746 // the addresses don't conflict) |
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|
2747 if (UseSharedSpaces) { |
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|
2748 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
2749 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
2750 |
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2751 // Open the shared archive file, read and validate the header. If |
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2752 // initialization fails, shared spaces [UseSharedSpaces] are |
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|
2753 // disabled and the file is closed. |
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|
2754 // Map in spaces now also |
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|
2755 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
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|
2756 FileMapInfo::set_current_info(mapinfo); |
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|
2757 } else { |
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|
2758 assert(!mapinfo->is_open() && !UseSharedSpaces, |
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diff
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|
2759 "archive file not closed or shared spaces not disabled."); |
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|
2760 } |
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diff
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|
2761 } |
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diff
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|
2762 |
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|
2763 // Initialize this before initializing the VirtualSpaceList |
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|
2764 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
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|
2765 // Arbitrarily set the initial virtual space to a multiple |
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|
2766 // of the boot class loader size. |
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|
2767 size_t word_size = VIRTUALSPACEMULTIPLIER * Metaspace::first_chunk_word_size(); |
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|
2768 // Initialize the list of virtual spaces. |
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|
2769 _space_list = new VirtualSpaceList(word_size); |
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diff
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|
2770 } |
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diff
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|
2771 } |
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diff
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|
2772 |
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|
2773 // For UseCompressedKlassPointers the class space is reserved as a piece of the |
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|
2774 // Java heap because the compression algorithm is the same for each. The |
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parents:
diff
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|
2775 // argument passed in is at the top of the compressed space |
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|
2776 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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|
2777 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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|
2778 assert(rs.size() >= ClassMetaspaceSize, err_msg("%d != %d", rs.size(), ClassMetaspaceSize)); |
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|
2779 _class_space_list = new VirtualSpaceList(rs); |
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diff
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|
2780 } |
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diff
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|
2781 |
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|
2782 |
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|
2783 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
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|
2784 // Use SmallChunk size if not specified. If specified, use this size for |
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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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|
2785 // the data metaspace. |
6725
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|
2786 size_t word_size; |
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diff
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|
2787 size_t class_word_size; |
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|
2788 if (initial_size == 0) { |
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|
2789 word_size = (size_t) SpaceManager::SmallChunk; |
6736
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
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6734
diff
changeset
|
2790 class_word_size = (size_t) SpaceManager::SmallChunk; |
6725
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|
2791 } else { |
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diff
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|
2792 word_size = initial_size; |
6736
11fb740ce98f
7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
coleenp
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6734
diff
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|
2793 // 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
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6734
diff
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|
2794 // on the medium chunk list. The next chunk will be small and progress |
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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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|
2795 // from there. This size calculated by -version. |
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7196103: NPG: Unable to allocate bit map for parallel garbage collection for the requested heap size
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6734
diff
changeset
|
2796 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
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6734
diff
changeset
|
2797 (ClassMetaspaceSize/BytesPerWord)*2); |
6725
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diff
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|
2798 } |
da91efe96a93
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coleenp
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diff
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|
2799 |
da91efe96a93
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diff
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|
2800 assert(space_list() != NULL, |
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diff
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|
2801 "Metadata VirtualSpaceList has not been initialized"); |
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diff
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|
2802 |
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|
2803 _vsm = new SpaceManager(lock, space_list()); |
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diff
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|
2804 if (_vsm == NULL) { |
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diff
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|
2805 return; |
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diff
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|
2806 } |
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diff
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|
2807 |
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|
2808 assert(class_space_list() != NULL, |
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parents:
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|
2809 "Class VirtualSpaceList has not been initialized"); |
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coleenp
parents:
diff
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|
2810 |
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diff
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|
2811 // Allocate SpaceManager for classes. |
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|
2812 _class_vsm = new SpaceManager(lock, class_space_list()); |
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diff
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|
2813 if (_class_vsm == NULL) { |
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parents:
diff
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|
2814 return; |
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diff
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|
2815 } |
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diff
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|
2816 |
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|
2817 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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diff
changeset
|
2818 |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2819 // Allocate chunk for metadata objects |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2820 Metachunk* new_chunk = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2821 space_list()->current_virtual_space()->get_chunk_vs_with_expand(word_size); |
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coleenp
parents:
diff
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|
2822 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2823 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2824 // Add to this manager's list of chunks in use and current_chunk(). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2825 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2826 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2827 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2828 // Allocate chunk for class metadata objects |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2829 Metachunk* class_chunk = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2830 class_space_list()->current_virtual_space()->get_chunk_vs_with_expand(class_word_size); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2831 if (class_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2832 class_vsm()->add_chunk(class_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2833 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2834 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2835 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2836 |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2837 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
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coleenp
parents:
diff
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|
2838 // 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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|
2839 if (mdtype == ClassType && !DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2840 return class_vsm()->allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2841 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2842 return vsm()->allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2843 } |
da91efe96a93
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coleenp
parents:
diff
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|
2844 } |
da91efe96a93
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coleenp
parents:
diff
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|
2845 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2846 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2847 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2848 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2849 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
da91efe96a93
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coleenp
parents:
diff
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|
2850 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2851 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2852 |
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coleenp
parents:
diff
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|
2853 size_t Metaspace::used_words(MetadataType mdtype) const { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2854 // return vsm()->allocation_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2855 return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
da91efe96a93
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coleenp
parents:
diff
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|
2856 vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2857 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2858 |
da91efe96a93
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coleenp
parents:
diff
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|
2859 size_t Metaspace::free_words(MetadataType mdtype) const { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2860 return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
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coleenp
parents:
diff
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|
2861 vsm()->sum_free_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2862 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2863 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2864 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2865 // space in the list of chunks from which allocations |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2866 // 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
|
2867 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2868 // is already counted in some chunk. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2869 size_t Metaspace::capacity_words(MetadataType mdtype) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2870 return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
da91efe96a93
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coleenp
parents:
diff
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|
2871 vsm()->sum_capacity_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2872 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2873 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2874 void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2875 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2876 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2877 // Don't take lock |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2878 #ifdef DEALLOCATE_BLOCKS |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2879 if (is_class) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2880 class_vsm()->deallocate(ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2881 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2882 vsm()->deallocate(ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2883 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2884 #else |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2885 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2886 Copy::fill_to_words((HeapWord*)ptr, word_size, metadata_deallocate); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2887 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2888 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2889 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2890 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2891 MutexLocker ml(vsm()->lock()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2892 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2893 #ifdef DEALLOCATE_BLOCKS |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2894 if (is_class) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2895 class_vsm()->deallocate(ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2896 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2897 vsm()->deallocate(ptr); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2898 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2899 #else |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2900 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2901 Copy::fill_to_words((HeapWord*)ptr, word_size, metadata_deallocate); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2902 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2903 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2904 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2905 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2906 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2907 MetaWord* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2908 bool read_only, MetadataType mdtype, TRAPS) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2909 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2910 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2911 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2912 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2913 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2914 // SSS: Should we align the allocations and make sure the sizes are aligned. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2915 MetaWord* result = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2916 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2917 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2918 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2919 // Allocate in metaspaces without taking out a lock, because it deadlocks |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2920 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2921 // to revisit this for application class data sharing. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2922 if (DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2923 if (read_only) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2924 result = loader_data->ro_metaspace()->allocate(word_size, NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2925 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2926 result = loader_data->rw_metaspace()->allocate(word_size, NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2927 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2928 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2929 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2930 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2931 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2932 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2933 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2934 result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2935 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2936 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2937 // Try to clean out some memory and retry. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2938 result = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2939 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2940 loader_data, word_size, mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2941 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2942 // If result is still null, we are out of memory. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2943 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2944 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2945 report_java_out_of_memory("Metadata space"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2946 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2947 if (JvmtiExport::should_post_resource_exhausted()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2948 JvmtiExport::post_resource_exhausted( |
da91efe96a93
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coleenp
parents:
diff
changeset
|
2949 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2950 "Metadata space"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2951 } |
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2952 THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); |
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2953 } |
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2954 } |
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2955 return result; |
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2956 } |
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2957 |
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2958 void Metaspace::print_on(outputStream* out) const { |
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2959 // Print both class virtual space counts and metaspace. |
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2960 if (Verbose) { |
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2961 vsm()->print_on(out); |
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2962 class_vsm()->print_on(out); |
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2963 } |
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2964 } |
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2965 |
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2966 #ifndef PRODUCT |
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2967 bool Metaspace::contains(const void * ptr) const { |
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2968 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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2969 return true; |
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2970 } |
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2971 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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2972 return space_list()->contains(ptr) || class_space_list()->contains(ptr); |
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2973 } |
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2974 #endif |
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2975 |
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2976 void Metaspace::verify() { |
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2977 vsm()->verify(); |
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2978 class_vsm()->verify(); |
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2979 } |
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2980 |
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2981 void Metaspace::dump(outputStream* const out) const { |
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2982 if (UseMallocOnly) { |
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2983 // Just print usage for now |
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2984 out->print_cr("usage %d", used_words(Metaspace::NonClassType)); |
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2985 } |
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2986 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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2987 vsm()->dump(out); |
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2988 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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2989 class_vsm()->dump(out); |
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2990 } |