Mercurial > hg > truffle
annotate src/share/vm/memory/metaspace.cpp @ 11646:8f8f6afeb97a
New caching mechanism in TruffleCache for better compilation performance. Clean up of partial evaluator phases.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 15 Sep 2013 16:27:07 +0200 |
parents | cedf20e2a655 |
children | 83ca9dc4564d |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 #include "precompiled.hpp" |
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25 #include "gc_interface/collectedHeap.hpp" |
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26 #include "memory/binaryTreeDictionary.hpp" |
6885 | 27 #include "memory/freeList.hpp" |
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28 #include "memory/collectorPolicy.hpp" |
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29 #include "memory/filemap.hpp" |
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30 #include "memory/freeList.hpp" |
6885 | 31 #include "memory/metablock.hpp" |
32 #include "memory/metachunk.hpp" | |
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33 #include "memory/metaspace.hpp" |
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34 #include "memory/metaspaceShared.hpp" |
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35 #include "memory/resourceArea.hpp" |
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36 #include "memory/universe.hpp" |
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37 #include "runtime/globals.hpp" |
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38 #include "runtime/mutex.hpp" |
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39 #include "runtime/orderAccess.hpp" |
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40 #include "services/memTracker.hpp" |
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41 #include "utilities/copy.hpp" |
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42 #include "utilities/debug.hpp" |
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43 |
6885 | 44 typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
45 typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; | |
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46 // Define this macro to enable slow integrity checking of |
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47 // the free chunk lists |
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48 const bool metaspace_slow_verify = false; |
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49 |
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50 // 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 |
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55 MetaWord* last_allocated = 0; |
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56 |
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57 // Used in declarations in SpaceManager and ChunkManager |
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58 enum ChunkIndex { |
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59 ZeroIndex = 0, |
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60 SpecializedIndex = ZeroIndex, |
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61 SmallIndex = SpecializedIndex + 1, |
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62 MediumIndex = SmallIndex + 1, |
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63 HumongousIndex = MediumIndex + 1, |
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64 NumberOfFreeLists = 3, |
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65 NumberOfInUseLists = 4 |
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66 }; |
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67 |
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68 enum ChunkSizes { // in words. |
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69 ClassSpecializedChunk = 128, |
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70 SpecializedChunk = 128, |
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71 ClassSmallChunk = 256, |
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72 SmallChunk = 512, |
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73 ClassMediumChunk = 4 * K, |
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74 MediumChunk = 8 * K, |
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75 HumongousChunkGranularity = 8 |
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76 }; |
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77 |
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78 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 79 assert(i < NumberOfInUseLists, "Out of bound"); |
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80 return (ChunkIndex) (i+1); |
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81 } |
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82 |
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83 // Originally _capacity_until_GC was set to MetaspaceSize here but |
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84 // the default MetaspaceSize before argument processing was being |
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85 // used which was not the desired value. See the code |
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86 // in should_expand() to see how the initialization is handled |
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87 // now. |
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88 size_t MetaspaceGC::_capacity_until_GC = 0; |
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89 bool MetaspaceGC::_expand_after_GC = false; |
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90 uint MetaspaceGC::_shrink_factor = 0; |
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91 bool MetaspaceGC::_should_concurrent_collect = false; |
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92 |
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93 // Blocks of space for metadata are allocated out of Metachunks. |
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94 // |
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95 // Metachunk are allocated out of MetadataVirtualspaces and once |
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96 // allocated there is no explicit link between a Metachunk and |
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97 // the MetadataVirtualspaces from which it was allocated. |
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98 // |
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99 // Each SpaceManager maintains a |
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100 // list of the chunks it is using and the current chunk. The current |
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101 // chunk is the chunk from which allocations are done. Space freed in |
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102 // a chunk is placed on the free list of blocks (BlockFreelist) and |
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103 // reused from there. |
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104 |
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105 typedef class FreeList<Metachunk> ChunkList; |
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106 |
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107 // Manages the global free lists of chunks. |
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108 // Has three lists of free chunks, and a total size and |
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109 // count that includes all three |
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110 |
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111 class ChunkManager VALUE_OBJ_CLASS_SPEC { |
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112 |
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113 // Free list of chunks of different sizes. |
10175 | 114 // SpecializedChunk |
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115 // SmallChunk |
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116 // MediumChunk |
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117 // HumongousChunk |
6885 | 118 ChunkList _free_chunks[NumberOfFreeLists]; |
119 | |
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120 |
6885 | 121 // HumongousChunk |
122 ChunkTreeDictionary _humongous_dictionary; | |
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123 |
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124 // ChunkManager in all lists of this type |
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125 size_t _free_chunks_total; |
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126 size_t _free_chunks_count; |
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127 |
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128 void dec_free_chunks_total(size_t v) { |
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129 assert(_free_chunks_count > 0 && |
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130 _free_chunks_total > 0, |
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131 "About to go negative"); |
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132 Atomic::add_ptr(-1, &_free_chunks_count); |
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133 jlong minus_v = (jlong) - (jlong) v; |
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134 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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135 } |
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136 |
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137 // Debug support |
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138 |
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139 size_t sum_free_chunks(); |
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140 size_t sum_free_chunks_count(); |
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141 |
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142 void locked_verify_free_chunks_total(); |
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143 void slow_locked_verify_free_chunks_total() { |
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144 if (metaspace_slow_verify) { |
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145 locked_verify_free_chunks_total(); |
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146 } |
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147 } |
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148 void locked_verify_free_chunks_count(); |
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149 void slow_locked_verify_free_chunks_count() { |
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150 if (metaspace_slow_verify) { |
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151 locked_verify_free_chunks_count(); |
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152 } |
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153 } |
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154 void verify_free_chunks_count(); |
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155 |
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156 public: |
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157 |
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158 ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
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159 |
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160 // add or delete (return) a chunk to the global freelist. |
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161 Metachunk* chunk_freelist_allocate(size_t word_size); |
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162 void chunk_freelist_deallocate(Metachunk* chunk); |
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163 |
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164 // Map a size to a list index assuming that there are lists |
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165 // for special, small, medium, and humongous chunks. |
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166 static ChunkIndex list_index(size_t size); |
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167 |
10175 | 168 // Remove the chunk from its freelist. It is |
169 // expected to be on one of the _free_chunks[] lists. | |
170 void remove_chunk(Metachunk* chunk); | |
171 | |
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172 // Add the simple linked list of chunks to the freelist of chunks |
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173 // of type index. |
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174 void return_chunks(ChunkIndex index, Metachunk* chunks); |
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175 |
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176 // Total of the space in the free chunks list |
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177 size_t free_chunks_total(); |
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178 size_t free_chunks_total_in_bytes(); |
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179 |
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180 // Number of chunks in the free chunks list |
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181 size_t free_chunks_count(); |
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182 |
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183 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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184 Atomic::add_ptr(count, &_free_chunks_count); |
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185 Atomic::add_ptr(v, &_free_chunks_total); |
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186 } |
6885 | 187 ChunkTreeDictionary* humongous_dictionary() { |
188 return &_humongous_dictionary; | |
189 } | |
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190 |
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191 ChunkList* free_chunks(ChunkIndex index); |
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192 |
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193 // Returns the list for the given chunk word size. |
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194 ChunkList* find_free_chunks_list(size_t word_size); |
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195 |
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196 // Add and remove from a list by size. Selects |
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197 // list based on size of chunk. |
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198 void free_chunks_put(Metachunk* chuck); |
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199 Metachunk* free_chunks_get(size_t chunk_word_size); |
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200 |
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201 // Debug support |
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202 void verify(); |
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203 void slow_verify() { |
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204 if (metaspace_slow_verify) { |
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205 verify(); |
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206 } |
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207 } |
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208 void locked_verify(); |
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209 void slow_locked_verify() { |
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210 if (metaspace_slow_verify) { |
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211 locked_verify(); |
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212 } |
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213 } |
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214 void verify_free_chunks_total(); |
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215 |
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216 void locked_print_free_chunks(outputStream* st); |
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217 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 218 |
219 void print_on(outputStream* st); | |
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220 }; |
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221 |
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222 // Used to manage the free list of Metablocks (a block corresponds |
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223 // to the allocation of a quantum of metadata). |
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224 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 225 BlockTreeDictionary* _dictionary; |
226 static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); | |
227 | |
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228 // Accessors |
6885 | 229 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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230 |
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231 public: |
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232 BlockFreelist(); |
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233 ~BlockFreelist(); |
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234 |
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235 // Get and return a block to the free list |
6885 | 236 MetaWord* get_block(size_t word_size); |
237 void return_block(MetaWord* p, size_t word_size); | |
238 | |
239 size_t total_size() { | |
240 if (dictionary() == NULL) { | |
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241 return 0; |
6885 | 242 } else { |
243 return dictionary()->total_size(); | |
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244 } |
6885 | 245 } |
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246 |
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247 void print_on(outputStream* st) const; |
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248 }; |
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249 |
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250 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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251 friend class VirtualSpaceList; |
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252 |
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253 // Link to next VirtualSpaceNode |
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254 VirtualSpaceNode* _next; |
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255 |
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256 // total in the VirtualSpace |
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257 MemRegion _reserved; |
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258 ReservedSpace _rs; |
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259 VirtualSpace _virtual_space; |
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260 MetaWord* _top; |
10175 | 261 // count of chunks contained in this VirtualSpace |
262 uintx _container_count; | |
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263 |
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264 // Convenience functions for logical bottom and end |
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265 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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266 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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267 |
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268 // Convenience functions to access the _virtual_space |
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269 char* low() const { return virtual_space()->low(); } |
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270 char* high() const { return virtual_space()->high(); } |
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271 |
10175 | 272 // The first Metachunk will be allocated at the bottom of the |
273 // VirtualSpace | |
274 Metachunk* first_chunk() { return (Metachunk*) bottom(); } | |
275 | |
276 void inc_container_count(); | |
277 #ifdef ASSERT | |
278 uint container_count_slow(); | |
279 #endif | |
280 | |
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281 public: |
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282 |
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283 VirtualSpaceNode(size_t byte_size); |
10175 | 284 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
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285 ~VirtualSpaceNode(); |
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286 |
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287 // address of next available space in _virtual_space; |
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288 // Accessors |
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289 VirtualSpaceNode* next() { return _next; } |
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290 void set_next(VirtualSpaceNode* v) { _next = v; } |
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291 |
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292 void set_reserved(MemRegion const v) { _reserved = v; } |
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293 void set_top(MetaWord* v) { _top = v; } |
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294 |
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295 // Accessors |
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296 MemRegion* reserved() { return &_reserved; } |
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297 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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298 |
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299 // Returns true if "word_size" is available in the VirtualSpace |
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300 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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301 |
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302 MetaWord* top() const { return _top; } |
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303 void inc_top(size_t word_size) { _top += word_size; } |
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304 |
10175 | 305 uintx container_count() { return _container_count; } |
306 void dec_container_count(); | |
307 #ifdef ASSERT | |
308 void verify_container_count(); | |
309 #endif | |
310 | |
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311 // used and capacity in this single entry in the list |
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312 size_t used_words_in_vs() const; |
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313 size_t capacity_words_in_vs() const; |
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314 size_t free_words_in_vs() const; |
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315 |
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316 bool initialize(); |
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317 |
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318 // get space from the virtual space |
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319 Metachunk* take_from_committed(size_t chunk_word_size); |
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320 |
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321 // Allocate a chunk from the virtual space and return it. |
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322 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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323 Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
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324 |
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325 // Expands/shrinks the committed space in a virtual space. Delegates |
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326 // to Virtualspace |
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327 bool expand_by(size_t words, bool pre_touch = false); |
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328 bool shrink_by(size_t words); |
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329 |
10175 | 330 // In preparation for deleting this node, remove all the chunks |
331 // in the node from any freelist. | |
332 void purge(ChunkManager* chunk_manager); | |
333 | |
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334 #ifdef ASSERT |
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335 // Debug support |
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336 static void verify_virtual_space_total(); |
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337 static void verify_virtual_space_count(); |
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338 void mangle(); |
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339 #endif |
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340 |
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341 void print_on(outputStream* st) const; |
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342 }; |
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343 |
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344 // byte_size is the size of the associated virtualspace. |
10175 | 345 VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0), _container_count(0) { |
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346 // align up to vm allocation granularity |
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347 byte_size = align_size_up(byte_size, os::vm_allocation_granularity()); |
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348 |
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349 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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350 // configurable address, generally at the top of the Java heap so other |
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351 // memory addresses don't conflict. |
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352 if (DumpSharedSpaces) { |
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353 char* shared_base = (char*)SharedBaseAddress; |
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354 _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
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355 if (_rs.is_reserved()) { |
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356 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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357 } else { |
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358 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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359 _rs = ReservedSpace(byte_size); |
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360 } |
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361 MetaspaceShared::set_shared_rs(&_rs); |
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362 } else { |
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363 _rs = ReservedSpace(byte_size); |
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364 } |
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365 |
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366 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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367 } |
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368 |
10175 | 369 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
370 Metachunk* chunk = first_chunk(); | |
371 Metachunk* invalid_chunk = (Metachunk*) top(); | |
372 while (chunk < invalid_chunk ) { | |
373 assert(chunk->is_free(), "Should be marked free"); | |
374 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
375 chunk_manager->remove_chunk(chunk); | |
376 assert(chunk->next() == NULL && | |
377 chunk->prev() == NULL, | |
378 "Was not removed from its list"); | |
379 chunk = (Metachunk*) next; | |
380 } | |
381 } | |
382 | |
383 #ifdef ASSERT | |
384 uint VirtualSpaceNode::container_count_slow() { | |
385 uint count = 0; | |
386 Metachunk* chunk = first_chunk(); | |
387 Metachunk* invalid_chunk = (Metachunk*) top(); | |
388 while (chunk < invalid_chunk ) { | |
389 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
390 // Don't count the chunks on the free lists. Those are | |
391 // still part of the VirtualSpaceNode but not currently | |
392 // counted. | |
393 if (!chunk->is_free()) { | |
394 count++; | |
395 } | |
396 chunk = (Metachunk*) next; | |
397 } | |
398 return count; | |
399 } | |
400 #endif | |
401 | |
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402 // List of VirtualSpaces for metadata allocation. |
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403 // It has a _next link for singly linked list and a MemRegion |
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404 // for total space in the VirtualSpace. |
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405 class VirtualSpaceList : public CHeapObj<mtClass> { |
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406 friend class VirtualSpaceNode; |
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407 |
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408 enum VirtualSpaceSizes { |
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409 VirtualSpaceSize = 256 * K |
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410 }; |
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411 |
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412 // Global list of virtual spaces |
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413 // Head of the list |
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414 VirtualSpaceNode* _virtual_space_list; |
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415 // virtual space currently being used for allocations |
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416 VirtualSpaceNode* _current_virtual_space; |
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417 // Free chunk list for all other metadata |
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418 ChunkManager _chunk_manager; |
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419 |
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420 // Can this virtual list allocate >1 spaces? Also, used to determine |
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421 // whether to allocate unlimited small chunks in this virtual space |
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422 bool _is_class; |
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423 bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
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424 |
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425 // Sum of space in all virtual spaces and number of virtual spaces |
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426 size_t _virtual_space_total; |
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427 size_t _virtual_space_count; |
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428 |
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429 ~VirtualSpaceList(); |
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430 |
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431 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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432 |
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433 void set_virtual_space_list(VirtualSpaceNode* v) { |
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434 _virtual_space_list = v; |
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435 } |
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436 void set_current_virtual_space(VirtualSpaceNode* v) { |
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437 _current_virtual_space = v; |
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438 } |
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439 |
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440 void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
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441 |
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442 // Get another virtual space and add it to the list. This |
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443 // is typically prompted by a failed attempt to allocate a chunk |
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444 // and is typically followed by the allocation of a chunk. |
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445 bool grow_vs(size_t vs_word_size); |
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446 |
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447 public: |
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448 VirtualSpaceList(size_t word_size); |
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449 VirtualSpaceList(ReservedSpace rs); |
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450 |
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451 size_t free_bytes(); |
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452 |
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453 Metachunk* get_new_chunk(size_t word_size, |
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454 size_t grow_chunks_by_words, |
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455 size_t medium_chunk_bunch); |
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456 |
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457 // Get the first chunk for a Metaspace. Used for |
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458 // special cases such as the boot class loader, reflection |
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459 // class loader and anonymous class loader. |
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460 Metachunk* get_initialization_chunk(size_t word_size, size_t chunk_bunch); |
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461 |
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462 VirtualSpaceNode* current_virtual_space() { |
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463 return _current_virtual_space; |
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464 } |
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465 |
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466 ChunkManager* chunk_manager() { return &_chunk_manager; } |
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467 bool is_class() const { return _is_class; } |
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468 |
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469 // Allocate the first virtualspace. |
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470 void initialize(size_t word_size); |
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471 |
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472 size_t virtual_space_total() { return _virtual_space_total; } |
10175 | 473 |
474 void inc_virtual_space_total(size_t v); | |
475 void dec_virtual_space_total(size_t v); | |
476 void inc_virtual_space_count(); | |
477 void dec_virtual_space_count(); | |
478 | |
479 // Unlink empty VirtualSpaceNodes and free it. | |
480 void purge(); | |
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481 |
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482 // Used and capacity in the entire list of virtual spaces. |
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483 // These are global values shared by all Metaspaces |
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484 size_t capacity_words_sum(); |
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485 size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
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486 size_t used_words_sum(); |
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487 size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
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488 |
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489 bool contains(const void *ptr); |
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490 |
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491 void print_on(outputStream* st) const; |
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492 |
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493 class VirtualSpaceListIterator : public StackObj { |
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494 VirtualSpaceNode* _virtual_spaces; |
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495 public: |
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496 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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497 _virtual_spaces(virtual_spaces) {} |
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498 |
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499 bool repeat() { |
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500 return _virtual_spaces != NULL; |
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501 } |
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502 |
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503 VirtualSpaceNode* get_next() { |
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504 VirtualSpaceNode* result = _virtual_spaces; |
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505 if (_virtual_spaces != NULL) { |
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506 _virtual_spaces = _virtual_spaces->next(); |
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507 } |
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508 return result; |
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509 } |
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510 }; |
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511 }; |
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512 |
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513 class Metadebug : AllStatic { |
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514 // Debugging support for Metaspaces |
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515 static int _deallocate_block_a_lot_count; |
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516 static int _deallocate_chunk_a_lot_count; |
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517 static int _allocation_fail_alot_count; |
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518 |
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519 public: |
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520 static int deallocate_block_a_lot_count() { |
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521 return _deallocate_block_a_lot_count; |
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522 } |
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523 static void set_deallocate_block_a_lot_count(int v) { |
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524 _deallocate_block_a_lot_count = v; |
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525 } |
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526 static void inc_deallocate_block_a_lot_count() { |
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527 _deallocate_block_a_lot_count++; |
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528 } |
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529 static int deallocate_chunk_a_lot_count() { |
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530 return _deallocate_chunk_a_lot_count; |
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531 } |
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532 static void reset_deallocate_chunk_a_lot_count() { |
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533 _deallocate_chunk_a_lot_count = 1; |
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534 } |
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535 static void inc_deallocate_chunk_a_lot_count() { |
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536 _deallocate_chunk_a_lot_count++; |
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537 } |
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538 |
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539 static void init_allocation_fail_alot_count(); |
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540 #ifdef ASSERT |
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541 static bool test_metadata_failure(); |
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542 #endif |
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543 |
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544 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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545 size_t chunk_word_size); |
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546 static void deallocate_block_a_lot(SpaceManager* sm, |
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547 size_t chunk_word_size); |
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548 |
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549 }; |
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550 |
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551 int Metadebug::_deallocate_block_a_lot_count = 0; |
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552 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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553 int Metadebug::_allocation_fail_alot_count = 0; |
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554 |
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555 // SpaceManager - used by Metaspace to handle allocations |
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556 class SpaceManager : public CHeapObj<mtClass> { |
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557 friend class Metaspace; |
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558 friend class Metadebug; |
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559 |
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560 private: |
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561 |
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562 // protects allocations and contains. |
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563 Mutex* const _lock; |
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564 |
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565 // Type of metadata allocated. |
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566 Metaspace::MetadataType _mdtype; |
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567 |
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568 // Chunk related size |
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569 size_t _medium_chunk_bunch; |
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570 |
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571 // List of chunks in use by this SpaceManager. Allocations |
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572 // are done from the current chunk. The list is used for deallocating |
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573 // chunks when the SpaceManager is freed. |
6885 | 574 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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575 Metachunk* _current_chunk; |
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576 |
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577 // Virtual space where allocation comes from. |
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578 VirtualSpaceList* _vs_list; |
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579 |
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580 // Number of small chunks to allocate to a manager |
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581 // If class space manager, small chunks are unlimited |
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582 static uint const _small_chunk_limit; |
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583 |
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584 // Sum of all space in allocated chunks |
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585 size_t _allocated_blocks_words; |
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586 |
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587 // Sum of all allocated chunks |
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588 size_t _allocated_chunks_words; |
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589 size_t _allocated_chunks_count; |
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590 |
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591 // Free lists of blocks are per SpaceManager since they |
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592 // are assumed to be in chunks in use by the SpaceManager |
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593 // and all chunks in use by a SpaceManager are freed when |
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594 // the class loader using the SpaceManager is collected. |
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595 BlockFreelist _block_freelists; |
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596 |
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597 // protects virtualspace and chunk expansions |
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598 static const char* _expand_lock_name; |
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599 static const int _expand_lock_rank; |
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600 static Mutex* const _expand_lock; |
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601 |
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602 private: |
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603 // Accessors |
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604 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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605 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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606 |
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607 BlockFreelist* block_freelists() const { |
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608 return (BlockFreelist*) &_block_freelists; |
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609 } |
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610 |
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611 Metaspace::MetadataType mdtype() { return _mdtype; } |
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612 VirtualSpaceList* vs_list() const { return _vs_list; } |
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613 |
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614 Metachunk* current_chunk() const { return _current_chunk; } |
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615 void set_current_chunk(Metachunk* v) { |
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616 _current_chunk = v; |
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617 } |
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618 |
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619 Metachunk* find_current_chunk(size_t word_size); |
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620 |
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621 // Add chunk to the list of chunks in use |
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622 void add_chunk(Metachunk* v, bool make_current); |
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623 |
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624 Mutex* lock() const { return _lock; } |
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625 |
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626 const char* chunk_size_name(ChunkIndex index) const; |
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627 |
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628 protected: |
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629 void initialize(); |
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630 |
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631 public: |
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632 SpaceManager(Metaspace::MetadataType mdtype, |
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633 Mutex* lock, |
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634 VirtualSpaceList* vs_list); |
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635 ~SpaceManager(); |
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636 |
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637 enum ChunkMultiples { |
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638 MediumChunkMultiple = 4 |
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639 }; |
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640 |
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641 // Accessors |
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642 size_t specialized_chunk_size() { return SpecializedChunk; } |
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643 size_t small_chunk_size() { return (size_t) vs_list()->is_class() ? ClassSmallChunk : SmallChunk; } |
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644 size_t medium_chunk_size() { return (size_t) vs_list()->is_class() ? ClassMediumChunk : MediumChunk; } |
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645 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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646 |
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647 size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
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648 size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
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649 size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
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650 size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
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651 |
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652 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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653 |
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654 static Mutex* expand_lock() { return _expand_lock; } |
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655 |
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656 // Increment the per Metaspace and global running sums for Metachunks |
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657 // by the given size. This is used when a Metachunk to added to |
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658 // the in-use list. |
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659 void inc_size_metrics(size_t words); |
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660 // Increment the per Metaspace and global running sums Metablocks by the given |
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661 // size. This is used when a Metablock is allocated. |
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662 void inc_used_metrics(size_t words); |
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663 // Delete the portion of the running sums for this SpaceManager. That is, |
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664 // the globals running sums for the Metachunks and Metablocks are |
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665 // decremented for all the Metachunks in-use by this SpaceManager. |
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666 void dec_total_from_size_metrics(); |
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667 |
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668 // Set the sizes for the initial chunks. |
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669 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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670 size_t* chunk_word_size, |
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671 size_t* class_chunk_word_size); |
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672 |
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673 size_t sum_capacity_in_chunks_in_use() const; |
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674 size_t sum_used_in_chunks_in_use() const; |
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675 size_t sum_free_in_chunks_in_use() const; |
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676 size_t sum_waste_in_chunks_in_use() const; |
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677 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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678 |
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679 size_t sum_count_in_chunks_in_use(); |
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680 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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681 |
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682 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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683 |
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684 // Block allocation and deallocation. |
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685 // Allocates a block from the current chunk |
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686 MetaWord* allocate(size_t word_size); |
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687 |
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688 // Helper for allocations |
6885 | 689 MetaWord* allocate_work(size_t word_size); |
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690 |
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691 // Returns a block to the per manager freelist |
6885 | 692 void deallocate(MetaWord* p, size_t word_size); |
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693 |
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694 // Based on the allocation size and a minimum chunk size, |
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695 // returned chunk size (for expanding space for chunk allocation). |
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696 size_t calc_chunk_size(size_t allocation_word_size); |
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697 |
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698 // Called when an allocation from the current chunk fails. |
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699 // Gets a new chunk (may require getting a new virtual space), |
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700 // and allocates from that chunk. |
6885 | 701 MetaWord* grow_and_allocate(size_t word_size); |
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702 |
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703 // debugging support. |
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704 |
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705 void dump(outputStream* const out) const; |
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706 void print_on(outputStream* st) const; |
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707 void locked_print_chunks_in_use_on(outputStream* st) const; |
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708 |
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709 void verify(); |
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710 void verify_chunk_size(Metachunk* chunk); |
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711 NOT_PRODUCT(void mangle_freed_chunks();) |
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712 #ifdef ASSERT |
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713 void verify_allocated_blocks_words(); |
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714 #endif |
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715 |
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716 size_t get_raw_word_size(size_t word_size) { |
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717 // If only the dictionary is going to be used (i.e., no |
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718 // indexed free list), then there is a minimum size requirement. |
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719 // MinChunkSize is a placeholder for the real minimum size JJJ |
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720 size_t byte_size = word_size * BytesPerWord; |
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721 |
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722 size_t byte_size_with_overhead = byte_size + Metablock::overhead(); |
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723 |
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724 size_t raw_bytes_size = MAX2(byte_size_with_overhead, |
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725 Metablock::min_block_byte_size()); |
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726 raw_bytes_size = ARENA_ALIGN(raw_bytes_size); |
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727 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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728 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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729 |
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730 return raw_word_size; |
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731 } |
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732 }; |
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733 |
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734 uint const SpaceManager::_small_chunk_limit = 4; |
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735 |
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736 const char* SpaceManager::_expand_lock_name = |
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737 "SpaceManager chunk allocation lock"; |
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738 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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739 Mutex* const SpaceManager::_expand_lock = |
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740 new Mutex(SpaceManager::_expand_lock_rank, |
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741 SpaceManager::_expand_lock_name, |
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742 Mutex::_allow_vm_block_flag); |
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743 |
10175 | 744 void VirtualSpaceNode::inc_container_count() { |
745 assert_lock_strong(SpaceManager::expand_lock()); | |
746 _container_count++; | |
747 assert(_container_count == container_count_slow(), | |
748 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
749 "container_count_slow() " SIZE_FORMAT, | |
750 _container_count, container_count_slow())); | |
751 } | |
752 | |
753 void VirtualSpaceNode::dec_container_count() { | |
754 assert_lock_strong(SpaceManager::expand_lock()); | |
755 _container_count--; | |
756 } | |
757 | |
758 #ifdef ASSERT | |
759 void VirtualSpaceNode::verify_container_count() { | |
760 assert(_container_count == container_count_slow(), | |
761 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
762 "container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); | |
763 } | |
764 #endif | |
765 | |
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766 // BlockFreelist methods |
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767 |
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768 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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769 |
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770 BlockFreelist::~BlockFreelist() { |
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771 if (_dictionary != NULL) { |
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772 if (Verbose && TraceMetadataChunkAllocation) { |
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773 _dictionary->print_free_lists(gclog_or_tty); |
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774 } |
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775 delete _dictionary; |
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776 } |
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777 } |
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778 |
6885 | 779 Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
780 Metablock* block = (Metablock*) p; | |
781 block->set_word_size(word_size); | |
782 block->set_prev(NULL); | |
783 block->set_next(NULL); | |
784 | |
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785 return block; |
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786 } |
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787 |
6885 | 788 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
789 Metablock* free_chunk = initialize_free_chunk(p, word_size); | |
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790 if (dictionary() == NULL) { |
6885 | 791 _dictionary = new BlockTreeDictionary(); |
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792 } |
6885 | 793 dictionary()->return_chunk(free_chunk); |
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794 } |
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795 |
6885 | 796 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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797 if (dictionary() == NULL) { |
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798 return NULL; |
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799 } |
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800 |
6885 | 801 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
802 // Dark matter. Too small for dictionary. | |
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803 return NULL; |
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804 } |
6885 | 805 |
806 Metablock* free_block = | |
807 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::exactly); | |
808 if (free_block == NULL) { | |
809 return NULL; | |
810 } | |
811 | |
812 return (MetaWord*) free_block; | |
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813 } |
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814 |
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815 void BlockFreelist::print_on(outputStream* st) const { |
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816 if (dictionary() == NULL) { |
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817 return; |
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818 } |
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819 dictionary()->print_free_lists(st); |
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820 } |
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821 |
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822 // VirtualSpaceNode methods |
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823 |
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824 VirtualSpaceNode::~VirtualSpaceNode() { |
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825 _rs.release(); |
10175 | 826 #ifdef ASSERT |
827 size_t word_size = sizeof(*this) / BytesPerWord; | |
828 Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); | |
829 #endif | |
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830 } |
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831 |
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832 size_t VirtualSpaceNode::used_words_in_vs() const { |
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833 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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834 } |
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835 |
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836 // Space committed in the VirtualSpace |
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837 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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838 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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839 } |
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840 |
10183
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841 size_t VirtualSpaceNode::free_words_in_vs() const { |
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842 return pointer_delta(end(), top(), sizeof(MetaWord)); |
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843 } |
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844 |
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845 // Allocates the chunk from the virtual space only. |
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846 // This interface is also used internally for debugging. Not all |
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847 // chunks removed here are necessarily used for allocation. |
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848 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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849 // Bottom of the new chunk |
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850 MetaWord* chunk_limit = top(); |
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851 assert(chunk_limit != NULL, "Not safe to call this method"); |
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852 |
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853 if (!is_available(chunk_word_size)) { |
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854 if (TraceMetadataChunkAllocation) { |
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855 tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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856 // Dump some information about the virtual space that is nearly full |
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857 print_on(tty); |
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858 } |
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859 return NULL; |
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860 } |
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861 |
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862 // Take the space (bump top on the current virtual space). |
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863 inc_top(chunk_word_size); |
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864 |
10175 | 865 // Initialize the chunk |
866 Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); | |
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867 return result; |
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868 } |
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869 |
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870 |
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871 // Expand the virtual space (commit more of the reserved space) |
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872 bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
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873 size_t bytes = words * BytesPerWord; |
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874 bool result = virtual_space()->expand_by(bytes, pre_touch); |
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875 if (TraceMetavirtualspaceAllocation && !result) { |
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876 gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
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877 "for byte size " SIZE_FORMAT, bytes); |
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878 virtual_space()->print(); |
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879 } |
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880 return result; |
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881 } |
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882 |
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883 // Shrink the virtual space (commit more of the reserved space) |
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884 bool VirtualSpaceNode::shrink_by(size_t words) { |
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885 size_t bytes = words * BytesPerWord; |
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886 virtual_space()->shrink_by(bytes); |
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887 return true; |
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888 } |
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889 |
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890 // Add another chunk to the chunk list. |
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891 |
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892 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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893 assert_lock_strong(SpaceManager::expand_lock()); |
10175 | 894 Metachunk* result = take_from_committed(chunk_word_size); |
895 if (result != NULL) { | |
896 inc_container_count(); | |
897 } | |
898 return result; | |
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899 } |
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900 |
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901 Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
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902 assert_lock_strong(SpaceManager::expand_lock()); |
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903 |
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904 Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
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905 |
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906 if (new_chunk == NULL) { |
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907 // Only a small part of the virtualspace is committed when first |
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908 // allocated so committing more here can be expected. |
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909 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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910 size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
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911 page_size_words); |
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912 expand_by(aligned_expand_vs_by_words, false); |
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913 new_chunk = get_chunk_vs(chunk_word_size); |
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914 } |
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915 return new_chunk; |
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916 } |
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917 |
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918 bool VirtualSpaceNode::initialize() { |
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919 |
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920 if (!_rs.is_reserved()) { |
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921 return false; |
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922 } |
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923 |
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924 // An allocation out of this Virtualspace that is larger |
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925 // than an initial commit size can waste that initial committed |
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926 // space. |
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927 size_t committed_byte_size = 0; |
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928 bool result = virtual_space()->initialize(_rs, committed_byte_size); |
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929 if (result) { |
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930 set_top((MetaWord*)virtual_space()->low()); |
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931 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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932 (HeapWord*)(_rs.base() + _rs.size()))); |
6726
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933 |
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934 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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935 err_msg("Reserved start was not set properly " PTR_FORMAT |
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936 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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937 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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938 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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939 " != " SIZE_FORMAT, reserved()->word_size(), |
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940 _rs.size() / BytesPerWord)); |
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941 } |
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942 |
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943 return result; |
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944 } |
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945 |
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946 void VirtualSpaceNode::print_on(outputStream* st) const { |
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947 size_t used = used_words_in_vs(); |
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948 size_t capacity = capacity_words_in_vs(); |
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949 VirtualSpace* vs = virtual_space(); |
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950 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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951 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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952 PTR_FORMAT ", " PTR_FORMAT ")", |
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953 vs, capacity / K, |
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954 capacity == 0 ? 0 : used * 100 / capacity, |
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955 bottom(), top(), end(), |
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956 vs->high_boundary()); |
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957 } |
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958 |
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959 #ifdef ASSERT |
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960 void VirtualSpaceNode::mangle() { |
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961 size_t word_size = capacity_words_in_vs(); |
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962 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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963 } |
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964 #endif // ASSERT |
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965 |
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966 // VirtualSpaceList methods |
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967 // Space allocated from the VirtualSpace |
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968 |
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969 VirtualSpaceList::~VirtualSpaceList() { |
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970 VirtualSpaceListIterator iter(virtual_space_list()); |
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971 while (iter.repeat()) { |
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972 VirtualSpaceNode* vsl = iter.get_next(); |
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973 delete vsl; |
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974 } |
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975 } |
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976 |
10175 | 977 void VirtualSpaceList::inc_virtual_space_total(size_t v) { |
978 assert_lock_strong(SpaceManager::expand_lock()); | |
979 _virtual_space_total = _virtual_space_total + v; | |
980 } | |
981 void VirtualSpaceList::dec_virtual_space_total(size_t v) { | |
982 assert_lock_strong(SpaceManager::expand_lock()); | |
983 _virtual_space_total = _virtual_space_total - v; | |
984 } | |
985 | |
986 void VirtualSpaceList::inc_virtual_space_count() { | |
987 assert_lock_strong(SpaceManager::expand_lock()); | |
988 _virtual_space_count++; | |
989 } | |
990 void VirtualSpaceList::dec_virtual_space_count() { | |
991 assert_lock_strong(SpaceManager::expand_lock()); | |
992 _virtual_space_count--; | |
993 } | |
994 | |
995 void ChunkManager::remove_chunk(Metachunk* chunk) { | |
996 size_t word_size = chunk->word_size(); | |
997 ChunkIndex index = list_index(word_size); | |
998 if (index != HumongousIndex) { | |
999 free_chunks(index)->remove_chunk(chunk); | |
1000 } else { | |
1001 humongous_dictionary()->remove_chunk(chunk); | |
1002 } | |
1003 | |
1004 // Chunk is being removed from the chunks free list. | |
1005 dec_free_chunks_total(chunk->capacity_word_size()); | |
1006 } | |
1007 | |
1008 // Walk the list of VirtualSpaceNodes and delete | |
1009 // nodes with a 0 container_count. Remove Metachunks in | |
1010 // the node from their respective freelists. | |
1011 void VirtualSpaceList::purge() { | |
1012 assert_lock_strong(SpaceManager::expand_lock()); | |
1013 // Don't use a VirtualSpaceListIterator because this | |
1014 // list is being changed and a straightforward use of an iterator is not safe. | |
1015 VirtualSpaceNode* purged_vsl = NULL; | |
1016 VirtualSpaceNode* prev_vsl = virtual_space_list(); | |
1017 VirtualSpaceNode* next_vsl = prev_vsl; | |
1018 while (next_vsl != NULL) { | |
1019 VirtualSpaceNode* vsl = next_vsl; | |
1020 next_vsl = vsl->next(); | |
1021 // Don't free the current virtual space since it will likely | |
1022 // be needed soon. | |
1023 if (vsl->container_count() == 0 && vsl != current_virtual_space()) { | |
1024 // Unlink it from the list | |
1025 if (prev_vsl == vsl) { | |
1026 // This is the case of the current note being the first note. | |
1027 assert(vsl == virtual_space_list(), "Expected to be the first note"); | |
1028 set_virtual_space_list(vsl->next()); | |
1029 } else { | |
1030 prev_vsl->set_next(vsl->next()); | |
1031 } | |
1032 | |
1033 vsl->purge(chunk_manager()); | |
1034 dec_virtual_space_total(vsl->reserved()->word_size()); | |
1035 dec_virtual_space_count(); | |
1036 purged_vsl = vsl; | |
1037 delete vsl; | |
1038 } else { | |
1039 prev_vsl = vsl; | |
1040 } | |
1041 } | |
1042 #ifdef ASSERT | |
1043 if (purged_vsl != NULL) { | |
1044 // List should be stable enough to use an iterator here. | |
1045 VirtualSpaceListIterator iter(virtual_space_list()); | |
1046 while (iter.repeat()) { | |
1047 VirtualSpaceNode* vsl = iter.get_next(); | |
1048 assert(vsl != purged_vsl, "Purge of vsl failed"); | |
1049 } | |
1050 } | |
1051 #endif | |
1052 } | |
1053 | |
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1054 size_t VirtualSpaceList::used_words_sum() { |
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1055 size_t allocated_by_vs = 0; |
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1056 VirtualSpaceListIterator iter(virtual_space_list()); |
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1057 while (iter.repeat()) { |
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1058 VirtualSpaceNode* vsl = iter.get_next(); |
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1059 // Sum used region [bottom, top) in each virtualspace |
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1060 allocated_by_vs += vsl->used_words_in_vs(); |
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1061 } |
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1062 assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
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1063 err_msg("Total in free chunks " SIZE_FORMAT |
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1064 " greater than total from virtual_spaces " SIZE_FORMAT, |
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1065 allocated_by_vs, chunk_manager()->free_chunks_total())); |
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1066 size_t used = |
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1067 allocated_by_vs - chunk_manager()->free_chunks_total(); |
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1068 return used; |
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1069 } |
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1070 |
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1071 // Space available in all MetadataVirtualspaces allocated |
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1072 // for metadata. This is the upper limit on the capacity |
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1073 // of chunks allocated out of all the MetadataVirtualspaces. |
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1074 size_t VirtualSpaceList::capacity_words_sum() { |
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1075 size_t capacity = 0; |
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1076 VirtualSpaceListIterator iter(virtual_space_list()); |
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1077 while (iter.repeat()) { |
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1078 VirtualSpaceNode* vsl = iter.get_next(); |
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1079 capacity += vsl->capacity_words_in_vs(); |
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1080 } |
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1081 return capacity; |
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1082 } |
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1083 |
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1084 VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
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1085 _is_class(false), |
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1086 _virtual_space_list(NULL), |
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1087 _current_virtual_space(NULL), |
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1088 _virtual_space_total(0), |
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1089 _virtual_space_count(0) { |
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1090 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1091 Mutex::_no_safepoint_check_flag); |
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1092 bool initialization_succeeded = grow_vs(word_size); |
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1093 |
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1094 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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1095 _chunk_manager.free_chunks(SmallIndex)->set_size(SmallChunk); |
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1096 _chunk_manager.free_chunks(MediumIndex)->set_size(MediumChunk); |
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1097 assert(initialization_succeeded, |
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1098 " VirtualSpaceList initialization should not fail"); |
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1099 } |
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1100 |
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1101 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1102 _is_class(true), |
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1103 _virtual_space_list(NULL), |
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1104 _current_virtual_space(NULL), |
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1105 _virtual_space_total(0), |
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1106 _virtual_space_count(0) { |
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1107 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1108 Mutex::_no_safepoint_check_flag); |
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1109 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1110 bool succeeded = class_entry->initialize(); |
10101
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1111 _chunk_manager.free_chunks(SpecializedIndex)->set_size(SpecializedChunk); |
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1112 _chunk_manager.free_chunks(SmallIndex)->set_size(ClassSmallChunk); |
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1113 _chunk_manager.free_chunks(MediumIndex)->set_size(ClassMediumChunk); |
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1114 assert(succeeded, " VirtualSpaceList initialization should not fail"); |
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1115 link_vs(class_entry, rs.size()/BytesPerWord); |
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1116 } |
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1117 |
10183
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1118 size_t VirtualSpaceList::free_bytes() { |
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1119 return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
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1120 } |
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1121 |
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1122 // Allocate another meta virtual space and add it to the list. |
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1123 bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
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1124 assert_lock_strong(SpaceManager::expand_lock()); |
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1125 if (vs_word_size == 0) { |
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1126 return false; |
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1127 } |
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1128 // Reserve the space |
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1129 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1130 assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
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1131 |
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1132 // Allocate the meta virtual space and initialize it. |
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1133 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1134 if (!new_entry->initialize()) { |
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1135 delete new_entry; |
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1136 return false; |
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1137 } else { |
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1138 // ensure lock-free iteration sees fully initialized node |
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1139 OrderAccess::storestore(); |
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1140 link_vs(new_entry, vs_word_size); |
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1141 return true; |
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1142 } |
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1143 } |
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1144 |
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1145 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
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1146 if (virtual_space_list() == NULL) { |
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1147 set_virtual_space_list(new_entry); |
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1148 } else { |
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1149 current_virtual_space()->set_next(new_entry); |
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1150 } |
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1151 set_current_virtual_space(new_entry); |
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1152 inc_virtual_space_total(vs_word_size); |
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1153 inc_virtual_space_count(); |
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1154 #ifdef ASSERT |
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1155 new_entry->mangle(); |
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1156 #endif |
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1157 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1158 VirtualSpaceNode* vsl = current_virtual_space(); |
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1159 vsl->print_on(tty); |
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1160 } |
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1161 } |
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1162 |
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1163 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1164 size_t grow_chunks_by_words, |
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1165 size_t medium_chunk_bunch) { |
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1166 |
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1167 // Get a chunk from the chunk freelist |
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1168 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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1169 |
10175 | 1170 if (next != NULL) { |
1171 next->container()->inc_container_count(); | |
1172 } else { | |
1173 // Allocate a chunk out of the current virtual space. | |
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1174 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1175 } |
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1176 |
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1177 if (next == NULL) { |
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1178 // Not enough room in current virtual space. Try to commit |
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1179 // more space. |
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1180 size_t expand_vs_by_words = MAX2(medium_chunk_bunch, |
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1181 grow_chunks_by_words); |
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1182 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1183 size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
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1184 page_size_words); |
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1185 bool vs_expanded = |
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1186 current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
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1187 if (!vs_expanded) { |
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1188 // Should the capacity of the metaspaces be expanded for |
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1189 // this allocation? If it's the virtual space for classes and is |
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1190 // being used for CompressedHeaders, don't allocate a new virtualspace. |
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1191 if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
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1192 // Get another virtual space. |
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1193 size_t grow_vs_words = |
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1194 MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
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1195 if (grow_vs(grow_vs_words)) { |
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1196 // Got it. It's on the list now. Get a chunk from it. |
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1197 next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
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1198 } |
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1199 } else { |
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1200 // Allocation will fail and induce a GC |
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1201 if (TraceMetadataChunkAllocation && Verbose) { |
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1202 gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
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1203 " Fail instead of expand the metaspace"); |
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1204 } |
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1205 } |
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1206 } else { |
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1207 // The virtual space expanded, get a new chunk |
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1208 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1209 assert(next != NULL, "Just expanded, should succeed"); |
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1210 } |
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1211 } |
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1212 |
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1213 assert(next == NULL || (next->next() == NULL && next->prev() == NULL), |
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1214 "New chunk is still on some list"); |
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1215 return next; |
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1216 } |
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1217 |
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1218 Metachunk* VirtualSpaceList::get_initialization_chunk(size_t chunk_word_size, |
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1219 size_t chunk_bunch) { |
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1220 // Get a chunk from the chunk freelist |
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1221 Metachunk* new_chunk = get_new_chunk(chunk_word_size, |
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1222 chunk_word_size, |
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1223 chunk_bunch); |
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1224 return new_chunk; |
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1225 } |
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1226 |
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1227 void VirtualSpaceList::print_on(outputStream* st) const { |
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1228 if (TraceMetadataChunkAllocation && Verbose) { |
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1229 VirtualSpaceListIterator iter(virtual_space_list()); |
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diff
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|
1230 while (iter.repeat()) { |
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diff
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|
1231 VirtualSpaceNode* node = iter.get_next(); |
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parents:
diff
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|
1232 node->print_on(st); |
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diff
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|
1233 } |
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|
1234 } |
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|
1235 } |
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diff
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|
1236 |
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|
1237 bool VirtualSpaceList::contains(const void *ptr) { |
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|
1238 VirtualSpaceNode* list = virtual_space_list(); |
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coleenp
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diff
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|
1239 VirtualSpaceListIterator iter(list); |
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parents:
diff
changeset
|
1240 while (iter.repeat()) { |
da91efe96a93
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coleenp
parents:
diff
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|
1241 VirtualSpaceNode* node = iter.get_next(); |
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coleenp
parents:
diff
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|
1242 if (node->reserved()->contains(ptr)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1243 return true; |
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parents:
diff
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|
1244 } |
da91efe96a93
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parents:
diff
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|
1245 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
1246 return false; |
da91efe96a93
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parents:
diff
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|
1247 } |
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|
1248 |
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|
1249 |
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|
1250 // MetaspaceGC methods |
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|
1251 |
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|
1252 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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|
1253 // Within the VM operation after the GC the attempt to allocate the metadata |
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|
1254 // should succeed. If the GC did not free enough space for the metaspace |
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1255 // allocation, the HWM is increased so that another virtualspace will be |
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|
1256 // allocated for the metadata. With perm gen the increase in the perm |
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1257 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1258 // metaspace policy uses those as the small and large steps for the HWM. |
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1259 // |
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1260 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1261 // resize the capacity of the metaspaces. The current implementation |
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1262 // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
6725
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1263 // to resize the Java heap by some GC's. New flags can be implemented |
10183
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1264 // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
6725
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1265 // free space is desirable in the metaspace capacity to decide how much |
8040
a83cd101fd62
8005452: NPG: Create new flags for Metaspace resizing policy
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8007
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1266 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
6725
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1267 // free space is desirable in the metaspace capacity before decreasing |
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1268 // the HWM. |
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|
1269 |
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|
1270 // Calculate the amount to increase the high water mark (HWM). |
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1271 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1272 // another expansion is not requested too soon. If that is not |
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1273 // enough to satisfy the allocation (i.e. big enough for a word_size |
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1274 // allocation), increase by MaxMetaspaceExpansion. If that is still |
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1275 // not enough, expand by the size of the allocation (word_size) plus |
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parents:
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|
1276 // some. |
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|
1277 size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
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1278 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
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1279 size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
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1280 size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
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1281 size_t page_size_words = os::vm_page_size() / BytesPerWord; |
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1282 size_t size_delta_words = align_size_up(word_size, page_size_words); |
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1283 size_t delta_words = MAX2(size_delta_words, min_delta_words); |
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1284 if (delta_words > min_delta_words) { |
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coleenp
parents:
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1285 // Don't want to hit the high water mark on the next |
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coleenp
parents:
diff
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|
1286 // allocation so make the delta greater than just enough |
da91efe96a93
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coleenp
parents:
diff
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|
1287 // for this allocation. |
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coleenp
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|
1288 delta_words = MAX2(delta_words, max_delta_words); |
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coleenp
parents:
diff
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|
1289 if (delta_words > max_delta_words) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1290 // This allocation is large but the next ones are probably not |
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coleenp
parents:
diff
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|
1291 // so increase by the minimum. |
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coleenp
parents:
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|
1292 delta_words = delta_words + min_delta_words; |
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coleenp
parents:
diff
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|
1293 } |
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parents:
diff
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|
1294 } |
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coleenp
parents:
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|
1295 return delta_words; |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1296 } |
da91efe96a93
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coleenp
parents:
diff
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|
1297 |
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coleenp
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diff
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|
1298 bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
10183
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|
1299 |
8790
7f0cb32dd233
8004241: NPG: Metaspace occupies more memory than specified by -XX:MaxMetaspaceSize option
mgerdin
parents:
8786
diff
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|
1300 // If the user wants a limit, impose one. |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
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|
1301 // The reason for someone using this flag is to limit reserved space. So |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
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|
1302 // for non-class virtual space, compare against virtual spaces that are reserved. |
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|
1303 // For class virtual space, we only compare against the committed space, not |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
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|
1304 // reserved space, because this is a larger space prereserved for compressed |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
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1305 // class pointers. |
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8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
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|
1306 if (!FLAG_IS_DEFAULT(MaxMetaspaceSize)) { |
de2d15ce3d4a
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1307 size_t real_allocated = Metaspace::space_list()->virtual_space_total() + |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
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|
1308 MetaspaceAux::allocated_capacity_bytes(Metaspace::ClassType); |
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8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
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|
1309 if (real_allocated >= MaxMetaspaceSize) { |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
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|
1310 return false; |
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8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
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|
1311 } |
8790
7f0cb32dd233
8004241: NPG: Metaspace occupies more memory than specified by -XX:MaxMetaspaceSize option
mgerdin
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diff
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|
1312 } |
6725
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|
1313 |
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6964458: Reimplement class meta-data storage to use native memory
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1314 // Class virtual space should always be expanded. Call GC for the other |
da91efe96a93
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parents:
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1315 // metadata virtual space. |
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1316 if (vsl == Metaspace::class_space_list()) return true; |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1317 |
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1318 // If this is part of an allocation after a GC, expand |
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1319 // unconditionally. |
10183
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1320 if (MetaspaceGC::expand_after_GC()) { |
6725
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1321 return true; |
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parents:
diff
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|
1322 } |
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parents:
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|
1323 |
10183
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|
1324 |
6725
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1325 // If the capacity is below the minimum capacity, allow the |
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|
1326 // expansion. Also set the high-water-mark (capacity_until_GC) |
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1327 // to that minimum capacity so that a GC will not be induced |
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|
1328 // until that minimum capacity is exceeded. |
11064
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1329 size_t committed_capacity_bytes = MetaspaceAux::allocated_capacity_bytes(); |
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1330 size_t metaspace_size_bytes = MetaspaceSize; |
10183
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1331 if (committed_capacity_bytes < metaspace_size_bytes || |
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|
1332 capacity_until_GC() == 0) { |
10183
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|
1333 set_capacity_until_GC(metaspace_size_bytes); |
6725
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1334 return true; |
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diff
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|
1335 } else { |
10183
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1336 if (committed_capacity_bytes < capacity_until_GC()) { |
6725
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|
1337 return true; |
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|
1338 } else { |
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1339 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1340 gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
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|
1341 " capacity_until_GC " SIZE_FORMAT |
10183
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|
1342 " allocated_capacity_bytes " SIZE_FORMAT, |
6725
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|
1343 word_size, |
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|
1344 capacity_until_GC(), |
10183
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|
1345 MetaspaceAux::allocated_capacity_bytes()); |
6725
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|
1346 } |
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|
1347 return false; |
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|
1348 } |
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|
1349 } |
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|
1350 } |
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|
1351 |
10183
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|
1352 |
6725
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1353 |
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1354 void MetaspaceGC::compute_new_size() { |
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1355 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1356 uint current_shrink_factor = _shrink_factor; |
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1357 _shrink_factor = 0; |
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1358 |
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1359 // Until a faster way of calculating the "used" quantity is implemented, |
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1360 // use "capacity". |
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1361 const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
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1362 const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
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1363 |
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1364 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1365 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1366 |
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1367 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1368 size_t minimum_desired_capacity = |
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1369 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1370 // Don't shrink less than the initial generation size |
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1371 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1372 MetaspaceSize); |
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1373 |
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1374 if (PrintGCDetails && Verbose) { |
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1375 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1376 gclog_or_tty->print_cr(" " |
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1377 " minimum_free_percentage: %6.2f" |
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1378 " maximum_used_percentage: %6.2f", |
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1379 minimum_free_percentage, |
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1380 maximum_used_percentage); |
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1381 gclog_or_tty->print_cr(" " |
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1382 " used_after_gc : %6.1fKB", |
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1383 used_after_gc / (double) K); |
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1384 } |
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1385 |
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1386 |
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1387 size_t shrink_bytes = 0; |
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1388 if (capacity_until_GC < minimum_desired_capacity) { |
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1389 // If we have less capacity below the metaspace HWM, then |
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1390 // increment the HWM. |
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1391 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1392 // Don't expand unless it's significant |
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1393 if (expand_bytes >= MinMetaspaceExpansion) { |
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1394 MetaspaceGC::set_capacity_until_GC(capacity_until_GC + expand_bytes); |
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1395 } |
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1396 if (PrintGCDetails && Verbose) { |
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1397 size_t new_capacity_until_GC = capacity_until_GC; |
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1398 gclog_or_tty->print_cr(" expanding:" |
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1399 " minimum_desired_capacity: %6.1fKB" |
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1400 " expand_bytes: %6.1fKB" |
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1401 " MinMetaspaceExpansion: %6.1fKB" |
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1402 " new metaspace HWM: %6.1fKB", |
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1403 minimum_desired_capacity / (double) K, |
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1404 expand_bytes / (double) K, |
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1405 MinMetaspaceExpansion / (double) K, |
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1406 new_capacity_until_GC / (double) K); |
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1407 } |
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1408 return; |
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1409 } |
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1410 |
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1411 // No expansion, now see if we want to shrink |
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1412 // We would never want to shrink more than this |
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1413 size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
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1414 assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
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1415 max_shrink_bytes)); |
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1416 |
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1417 // Should shrinking be considered? |
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1418 if (MaxMetaspaceFreeRatio < 100) { |
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1419 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1420 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1421 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1422 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1423 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1424 MetaspaceSize); |
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1425 if (PrintGCDetails && Verbose) { |
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1426 gclog_or_tty->print_cr(" " |
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1427 " maximum_free_percentage: %6.2f" |
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1428 " minimum_used_percentage: %6.2f", |
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1429 maximum_free_percentage, |
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1430 minimum_used_percentage); |
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1431 gclog_or_tty->print_cr(" " |
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1432 " minimum_desired_capacity: %6.1fKB" |
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1433 " maximum_desired_capacity: %6.1fKB", |
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1434 minimum_desired_capacity / (double) K, |
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1435 maximum_desired_capacity / (double) K); |
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1436 } |
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1437 |
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1438 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1439 "sanity check"); |
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1440 |
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1441 if (capacity_until_GC > maximum_desired_capacity) { |
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1442 // Capacity too large, compute shrinking size |
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1443 shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
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1444 // We don't want shrink all the way back to initSize if people call |
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1445 // System.gc(), because some programs do that between "phases" and then |
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1446 // we'd just have to grow the heap up again for the next phase. So we |
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1447 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1448 // on the third call, and 100% by the fourth call. But if we recompute |
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1449 // size without shrinking, it goes back to 0%. |
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1450 shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
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1451 assert(shrink_bytes <= max_shrink_bytes, |
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1452 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1453 shrink_bytes, max_shrink_bytes)); |
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1454 if (current_shrink_factor == 0) { |
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1455 _shrink_factor = 10; |
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1456 } else { |
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1457 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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1458 } |
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1459 if (PrintGCDetails && Verbose) { |
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1460 gclog_or_tty->print_cr(" " |
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1461 " shrinking:" |
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1462 " initSize: %.1fK" |
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1463 " maximum_desired_capacity: %.1fK", |
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1464 MetaspaceSize / (double) K, |
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1465 maximum_desired_capacity / (double) K); |
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1466 gclog_or_tty->print_cr(" " |
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1467 " shrink_bytes: %.1fK" |
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1468 " current_shrink_factor: %d" |
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1469 " new shrink factor: %d" |
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1470 " MinMetaspaceExpansion: %.1fK", |
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1471 shrink_bytes / (double) K, |
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1472 current_shrink_factor, |
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1473 _shrink_factor, |
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1474 MinMetaspaceExpansion / (double) K); |
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1475 } |
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1476 } |
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coleenp
parents:
diff
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|
1477 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1478 |
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coleenp
parents:
diff
changeset
|
1479 // Don't shrink unless it's significant |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
1480 if (shrink_bytes >= MinMetaspaceExpansion && |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
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|
1481 ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
1482 MetaspaceGC::set_capacity_until_GC(capacity_until_GC - shrink_bytes); |
6725
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coleenp
parents:
diff
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|
1483 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1484 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1485 |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1486 // Metadebug methods |
da91efe96a93
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parents:
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changeset
|
1487 |
da91efe96a93
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coleenp
parents:
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|
1488 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
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coleenp
parents:
diff
changeset
|
1489 size_t chunk_word_size){ |
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coleenp
parents:
diff
changeset
|
1490 #ifdef ASSERT |
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|
1491 VirtualSpaceList* vsl = sm->vs_list(); |
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coleenp
parents:
diff
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|
1492 if (MetaDataDeallocateALot && |
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coleenp
parents:
diff
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|
1493 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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coleenp
parents:
diff
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|
1494 Metadebug::reset_deallocate_chunk_a_lot_count(); |
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|
1495 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
da91efe96a93
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|
1496 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
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coleenp
parents:
diff
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|
1497 if (dummy_chunk == NULL) { |
da91efe96a93
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coleenp
parents:
diff
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|
1498 break; |
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coleenp
parents:
diff
changeset
|
1499 } |
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|
1500 vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
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parents:
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changeset
|
1501 |
da91efe96a93
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coleenp
parents:
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changeset
|
1502 if (TraceMetadataChunkAllocation && Verbose) { |
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parents:
diff
changeset
|
1503 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
da91efe96a93
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|
1504 sm->sum_count_in_chunks_in_use()); |
da91efe96a93
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|
1505 dummy_chunk->print_on(gclog_or_tty); |
da91efe96a93
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parents:
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|
1506 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
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coleenp
parents:
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|
1507 vsl->chunk_manager()->free_chunks_total(), |
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coleenp
parents:
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|
1508 vsl->chunk_manager()->free_chunks_count()); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1509 } |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1510 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1511 } else { |
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coleenp
parents:
diff
changeset
|
1512 Metadebug::inc_deallocate_chunk_a_lot_count(); |
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coleenp
parents:
diff
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|
1513 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1514 #endif |
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coleenp
parents:
diff
changeset
|
1515 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1516 |
da91efe96a93
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|
1517 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
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coleenp
parents:
diff
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|
1518 size_t raw_word_size){ |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1519 #ifdef ASSERT |
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coleenp
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|
1520 if (MetaDataDeallocateALot && |
da91efe96a93
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|
1521 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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coleenp
parents:
diff
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|
1522 Metadebug::set_deallocate_block_a_lot_count(0); |
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coleenp
parents:
diff
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|
1523 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1524 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1525 if (dummy_block == 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1526 break; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1527 } |
6885 | 1528 sm->deallocate(dummy_block, raw_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1529 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1530 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1531 Metadebug::inc_deallocate_block_a_lot_count(); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1532 } |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1533 #endif |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1534 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1535 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
1536 void Metadebug::init_allocation_fail_alot_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1537 if (MetadataAllocationFailALot) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1538 _allocation_fail_alot_count = |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1539 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1540 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1541 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1542 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1543 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1544 bool Metadebug::test_metadata_failure() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1545 if (MetadataAllocationFailALot && |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1546 Threads::is_vm_complete()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1547 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1548 _allocation_fail_alot_count--; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1549 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1550 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1551 gclog_or_tty->print_cr("Metadata allocation failing for " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1552 "MetadataAllocationFailALot"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1553 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1554 init_allocation_fail_alot_count(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1555 return true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1556 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1557 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1558 return false; |
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 #endif |
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 // ChunkManager 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 size_t ChunkManager::free_chunks_total() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1565 return _free_chunks_total; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1566 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1567 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1568 size_t ChunkManager::free_chunks_total_in_bytes() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1569 return free_chunks_total() * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1570 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1571 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1572 size_t ChunkManager::free_chunks_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1573 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1574 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1575 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1576 Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1577 // This lock is only needed in debug because the verification |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1578 // of the _free_chunks_totals walks the list of free chunks |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1579 slow_locked_verify_free_chunks_count(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1580 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1581 #endif |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1582 return _free_chunks_count; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1583 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1584 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1585 void ChunkManager::locked_verify_free_chunks_total() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1586 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1587 assert(sum_free_chunks() == _free_chunks_total, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1588 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1589 " same as sum " SIZE_FORMAT, _free_chunks_total, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1590 sum_free_chunks())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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
coleenp
parents:
diff
changeset
|
1593 void ChunkManager::verify_free_chunks_total() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1594 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1595 Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1596 locked_verify_free_chunks_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1597 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1598 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1599 void ChunkManager::locked_verify_free_chunks_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1600 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1601 assert(sum_free_chunks_count() == _free_chunks_count, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1602 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1603 " same as sum " SIZE_FORMAT, _free_chunks_count, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1604 sum_free_chunks_count())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1605 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1606 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1607 void ChunkManager::verify_free_chunks_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1608 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1609 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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1610 Mutex::_no_safepoint_check_flag); |
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1611 locked_verify_free_chunks_count(); |
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1612 #endif |
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1613 } |
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1614 |
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1615 void ChunkManager::verify() { |
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1616 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1617 Mutex::_no_safepoint_check_flag); |
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1618 locked_verify(); |
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1619 } |
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1620 |
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1621 void ChunkManager::locked_verify() { |
6885 | 1622 locked_verify_free_chunks_count(); |
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1623 locked_verify_free_chunks_total(); |
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1624 } |
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1625 |
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1626 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1627 assert_lock_strong(SpaceManager::expand_lock()); |
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1628 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1629 _free_chunks_total, _free_chunks_count); |
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1630 } |
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1631 |
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1632 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1633 assert_lock_strong(SpaceManager::expand_lock()); |
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1634 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1635 sum_free_chunks(), sum_free_chunks_count()); |
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1636 } |
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1637 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1638 return &_free_chunks[index]; |
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1639 } |
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1640 |
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1641 // These methods that sum the free chunk lists are used in printing |
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1642 // methods that are used in product builds. |
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1643 size_t ChunkManager::sum_free_chunks() { |
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1644 assert_lock_strong(SpaceManager::expand_lock()); |
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1645 size_t result = 0; |
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1646 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1647 ChunkList* list = free_chunks(i); |
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1648 |
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1649 if (list == NULL) { |
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1650 continue; |
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1651 } |
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1652 |
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1653 result = result + list->count() * list->size(); |
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1654 } |
6885 | 1655 result = result + humongous_dictionary()->total_size(); |
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1656 return result; |
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1657 } |
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1658 |
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1659 size_t ChunkManager::sum_free_chunks_count() { |
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1660 assert_lock_strong(SpaceManager::expand_lock()); |
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1661 size_t count = 0; |
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1662 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1663 ChunkList* list = free_chunks(i); |
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1664 if (list == NULL) { |
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1665 continue; |
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1666 } |
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1667 count = count + list->count(); |
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1668 } |
6885 | 1669 count = count + humongous_dictionary()->total_free_blocks(); |
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1670 return count; |
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1671 } |
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1672 |
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1673 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1674 ChunkIndex index = list_index(word_size); |
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1675 assert(index < HumongousIndex, "No humongous list"); |
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1676 return free_chunks(index); |
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1677 } |
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1678 |
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1679 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1680 assert_lock_strong(SpaceManager::expand_lock()); |
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1681 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1682 chunk->set_next(free_list->head()); |
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1683 free_list->set_head(chunk); |
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1684 // chunk is being returned to the chunk free list |
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1685 inc_free_chunks_total(chunk->capacity_word_size()); |
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1686 slow_locked_verify(); |
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1687 } |
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1688 |
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1689 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1690 // The deallocation of a chunk originates in the freelist |
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1691 // manangement code for a Metaspace and does not hold the |
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1692 // lock. |
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1693 assert(chunk != NULL, "Deallocating NULL"); |
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1694 assert_lock_strong(SpaceManager::expand_lock()); |
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|
1695 slow_locked_verify(); |
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1696 if (TraceMetadataChunkAllocation) { |
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1697 tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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|
1698 PTR_FORMAT " size " SIZE_FORMAT, |
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1699 chunk, chunk->word_size()); |
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|
1700 } |
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|
1701 free_chunks_put(chunk); |
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|
1702 } |
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1703 |
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1704 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1705 assert_lock_strong(SpaceManager::expand_lock()); |
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1706 |
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1707 slow_locked_verify(); |
6885 | 1708 |
1709 Metachunk* chunk = NULL; | |
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1710 if (list_index(word_size) != HumongousIndex) { |
6885 | 1711 ChunkList* free_list = find_free_chunks_list(word_size); |
1712 assert(free_list != NULL, "Sanity check"); | |
1713 | |
1714 chunk = free_list->head(); | |
1715 debug_only(Metachunk* debug_head = chunk;) | |
1716 | |
1717 if (chunk == NULL) { | |
1718 return NULL; | |
1719 } | |
1720 | |
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1721 // Remove the chunk as the head of the list. |
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1722 free_list->remove_chunk(chunk); |
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1723 |
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1724 // Chunk is being removed from the chunks free list. |
6885 | 1725 dec_free_chunks_total(chunk->capacity_word_size()); |
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1726 |
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1727 if (TraceMetadataChunkAllocation && Verbose) { |
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1728 tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1729 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1730 free_list, chunk, chunk->word_size()); |
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1731 } |
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1732 } else { |
6885 | 1733 chunk = humongous_dictionary()->get_chunk( |
1734 word_size, | |
1735 FreeBlockDictionary<Metachunk>::atLeast); | |
1736 | |
1737 if (chunk != NULL) { | |
1738 if (TraceMetadataHumongousAllocation) { | |
1739 size_t waste = chunk->word_size() - word_size; | |
1740 tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT | |
1741 " for requested size " SIZE_FORMAT | |
1742 " waste " SIZE_FORMAT, | |
1743 chunk->word_size(), word_size, waste); | |
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1744 } |
6885 | 1745 // Chunk is being removed from the chunks free list. |
1746 dec_free_chunks_total(chunk->capacity_word_size()); | |
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1747 } else { |
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1748 return NULL; |
6885 | 1749 } |
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1750 } |
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1751 |
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1752 // Remove it from the links to this freelist |
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1753 chunk->set_next(NULL); |
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1754 chunk->set_prev(NULL); |
10175 | 1755 #ifdef ASSERT |
1756 // Chunk is no longer on any freelist. Setting to false make container_count_slow() | |
1757 // work. | |
1758 chunk->set_is_free(false); | |
1759 #endif | |
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1760 slow_locked_verify(); |
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1761 return chunk; |
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|
1762 } |
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1763 |
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1764 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1765 assert_lock_strong(SpaceManager::expand_lock()); |
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1766 slow_locked_verify(); |
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1767 |
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1768 // Take from the beginning of the list |
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1769 Metachunk* chunk = free_chunks_get(word_size); |
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1770 if (chunk == NULL) { |
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1771 return NULL; |
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1772 } |
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1773 |
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1774 assert((word_size <= chunk->word_size()) || |
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1775 list_index(chunk->word_size() == HumongousIndex), |
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1776 "Non-humongous variable sized chunk"); |
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1777 if (TraceMetadataChunkAllocation) { |
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1778 size_t list_count; |
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1779 if (list_index(word_size) < HumongousIndex) { |
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1780 ChunkList* list = find_free_chunks_list(word_size); |
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1781 list_count = list->count(); |
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1782 } else { |
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1783 list_count = humongous_dictionary()->total_count(); |
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1784 } |
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1785 tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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1786 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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1787 this, chunk, chunk->word_size(), list_count); |
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1788 locked_print_free_chunks(tty); |
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1789 } |
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1790 |
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1791 return chunk; |
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1792 } |
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1793 |
6885 | 1794 void ChunkManager::print_on(outputStream* out) { |
1795 if (PrintFLSStatistics != 0) { | |
1796 humongous_dictionary()->report_statistics(); | |
1797 } | |
1798 } | |
1799 | |
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1800 // SpaceManager methods |
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1801 |
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1802 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1803 size_t* chunk_word_size, |
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1804 size_t* class_chunk_word_size) { |
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1805 switch (type) { |
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1806 case Metaspace::BootMetaspaceType: |
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1807 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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1808 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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1809 break; |
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1810 case Metaspace::ROMetaspaceType: |
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1811 *chunk_word_size = SharedReadOnlySize / wordSize; |
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1812 *class_chunk_word_size = ClassSpecializedChunk; |
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1813 break; |
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1814 case Metaspace::ReadWriteMetaspaceType: |
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1815 *chunk_word_size = SharedReadWriteSize / wordSize; |
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1816 *class_chunk_word_size = ClassSpecializedChunk; |
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1817 break; |
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1818 case Metaspace::AnonymousMetaspaceType: |
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1819 case Metaspace::ReflectionMetaspaceType: |
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1820 *chunk_word_size = SpecializedChunk; |
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1821 *class_chunk_word_size = ClassSpecializedChunk; |
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1822 break; |
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1823 default: |
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1824 *chunk_word_size = SmallChunk; |
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1825 *class_chunk_word_size = ClassSmallChunk; |
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1826 break; |
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1827 } |
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1828 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
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1829 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
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1830 " class " SIZE_FORMAT, |
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1831 *chunk_word_size, *class_chunk_word_size)); |
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1832 } |
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1833 |
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1834 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1835 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1836 size_t free = 0; |
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1837 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1838 Metachunk* chunk = chunks_in_use(i); |
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1839 while (chunk != NULL) { |
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1840 free += chunk->free_word_size(); |
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1841 chunk = chunk->next(); |
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1842 } |
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1843 } |
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1844 return free; |
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1845 } |
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1846 |
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1847 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1848 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1849 size_t result = 0; |
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1850 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1851 result += sum_waste_in_chunks_in_use(i); |
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1852 } |
6885 | 1853 |
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1854 return result; |
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1855 } |
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1856 |
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1857 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1858 size_t result = 0; |
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1859 Metachunk* chunk = chunks_in_use(index); |
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1860 // Count the free space in all the chunk but not the |
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1861 // current chunk from which allocations are still being done. |
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1862 while (chunk != NULL) { |
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1863 if (chunk != current_chunk()) { |
6885 | 1864 result += chunk->free_word_size(); |
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1865 } |
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1866 chunk = chunk->next(); |
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1867 } |
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1868 return result; |
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1869 } |
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1870 |
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1871 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1872 // For CMS use "allocated_chunks_words()" which does not need the |
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1873 // Metaspace lock. For the other collectors sum over the |
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1874 // lists. Use both methods as a check that "allocated_chunks_words()" |
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1875 // is correct. That is, sum_capacity_in_chunks() is too expensive |
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1876 // to use in the product and allocated_chunks_words() should be used |
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1877 // but allow for checking that allocated_chunks_words() returns the same |
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1878 // value as sum_capacity_in_chunks_in_use() which is the definitive |
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1879 // answer. |
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1880 if (UseConcMarkSweepGC) { |
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1881 return allocated_chunks_words(); |
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1882 } else { |
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1883 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1884 size_t sum = 0; |
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1885 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1886 Metachunk* chunk = chunks_in_use(i); |
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1887 while (chunk != NULL) { |
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1888 sum += chunk->capacity_word_size(); |
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1889 chunk = chunk->next(); |
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1890 } |
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1891 } |
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1892 return sum; |
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1893 } |
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1894 } |
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1895 |
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1896 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1897 size_t count = 0; |
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1898 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1899 count = count + sum_count_in_chunks_in_use(i); |
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1900 } |
6885 | 1901 |
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1902 return count; |
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1903 } |
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1904 |
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1905 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1906 size_t count = 0; |
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1907 Metachunk* chunk = chunks_in_use(i); |
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1908 while (chunk != NULL) { |
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1909 count++; |
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1910 chunk = chunk->next(); |
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1911 } |
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1912 return count; |
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1913 } |
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1914 |
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1915 |
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1916 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1917 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1918 size_t used = 0; |
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1919 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1920 Metachunk* chunk = chunks_in_use(i); |
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1921 while (chunk != NULL) { |
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1922 used += chunk->used_word_size(); |
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1923 chunk = chunk->next(); |
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1924 } |
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1925 } |
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1926 return used; |
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1927 } |
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1928 |
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1929 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1930 |
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1931 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1932 Metachunk* chunk = chunks_in_use(i); |
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1933 st->print("SpaceManager: %s " PTR_FORMAT, |
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1934 chunk_size_name(i), chunk); |
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1935 if (chunk != NULL) { |
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1936 st->print_cr(" free " SIZE_FORMAT, |
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1937 chunk->free_word_size()); |
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1938 } else { |
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1939 st->print_cr(""); |
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1940 } |
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1941 } |
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1942 |
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1943 vs_list()->chunk_manager()->locked_print_free_chunks(st); |
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1944 vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
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1945 } |
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1946 |
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1947 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1948 |
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1949 // Decide between a small chunk and a medium chunk. Up to |
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1950 // _small_chunk_limit small chunks can be allocated but |
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1951 // once a medium chunk has been allocated, no more small |
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1952 // chunks will be allocated. |
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1953 size_t chunk_word_size; |
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1954 if (chunks_in_use(MediumIndex) == NULL && |
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1955 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
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1956 chunk_word_size = (size_t) small_chunk_size(); |
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1957 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
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1958 chunk_word_size = medium_chunk_size(); |
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1959 } |
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1960 } else { |
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1961 chunk_word_size = medium_chunk_size(); |
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1962 } |
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1963 |
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1964 // Might still need a humongous chunk. Enforce an |
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1965 // eight word granularity to facilitate reuse (some |
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1966 // wastage but better chance of reuse). |
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1967 size_t if_humongous_sized_chunk = |
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1968 align_size_up(word_size + Metachunk::overhead(), |
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1969 HumongousChunkGranularity); |
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1970 chunk_word_size = |
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1971 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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1972 |
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1973 assert(!SpaceManager::is_humongous(word_size) || |
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1974 chunk_word_size == if_humongous_sized_chunk, |
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1975 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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1976 " chunk_word_size " SIZE_FORMAT, |
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1977 word_size, chunk_word_size)); |
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1978 if (TraceMetadataHumongousAllocation && |
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1979 SpaceManager::is_humongous(word_size)) { |
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1980 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1981 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1982 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1983 chunk_word_size); |
6885 | 1984 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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1985 Metachunk::overhead()); |
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1986 } |
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1987 return chunk_word_size; |
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1988 } |
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1989 |
6885 | 1990 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1991 assert(vs_list()->current_virtual_space() != NULL, |
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1992 "Should have been set"); |
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1993 assert(current_chunk() == NULL || |
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1994 current_chunk()->allocate(word_size) == NULL, |
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1995 "Don't need to expand"); |
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1996 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1997 |
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1998 if (TraceMetadataChunkAllocation && Verbose) { |
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1999 size_t words_left = 0; |
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2000 size_t words_used = 0; |
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2001 if (current_chunk() != NULL) { |
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2002 words_left = current_chunk()->free_word_size(); |
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2003 words_used = current_chunk()->used_word_size(); |
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2004 } |
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2005 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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2006 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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2007 " words left", |
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2008 word_size, words_used, words_left); |
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2009 } |
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2010 |
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2011 // Get another chunk out of the virtual space |
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2012 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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2013 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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2014 |
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2015 // If a chunk was available, add it to the in-use chunk list |
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2016 // and do an allocation from it. |
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2017 if (next != NULL) { |
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2018 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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2019 // Add to this manager's list of chunks in use. |
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2020 add_chunk(next, false); |
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2021 return next->allocate(word_size); |
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2022 } |
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2023 return NULL; |
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2024 } |
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2025 |
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2026 void SpaceManager::print_on(outputStream* st) const { |
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2027 |
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2028 for (ChunkIndex i = ZeroIndex; |
6885 | 2029 i < NumberOfInUseLists ; |
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2030 i = next_chunk_index(i) ) { |
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2031 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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2032 chunks_in_use(i), |
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2033 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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2034 } |
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2035 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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2036 " Humongous " SIZE_FORMAT, |
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2037 sum_waste_in_chunks_in_use(SmallIndex), |
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2038 sum_waste_in_chunks_in_use(MediumIndex), |
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2039 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 2040 // block free lists |
2041 if (block_freelists() != NULL) { | |
2042 st->print_cr("total in block free lists " SIZE_FORMAT, | |
2043 block_freelists()->total_size()); | |
2044 } | |
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2045 } |
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2046 |
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2047 SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
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2048 Mutex* lock, |
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2049 VirtualSpaceList* vs_list) : |
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2050 _vs_list(vs_list), |
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2051 _mdtype(mdtype), |
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2052 _allocated_blocks_words(0), |
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2053 _allocated_chunks_words(0), |
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2054 _allocated_chunks_count(0), |
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2055 _lock(lock) |
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2056 { |
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2057 initialize(); |
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2058 } |
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2059 |
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2060 void SpaceManager::inc_size_metrics(size_t words) { |
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2061 assert_lock_strong(SpaceManager::expand_lock()); |
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2062 // Total of allocated Metachunks and allocated Metachunks count |
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2063 // for each SpaceManager |
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2064 _allocated_chunks_words = _allocated_chunks_words + words; |
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2065 _allocated_chunks_count++; |
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2066 // Global total of capacity in allocated Metachunks |
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2067 MetaspaceAux::inc_capacity(mdtype(), words); |
10183
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2068 // Global total of allocated Metablocks. |
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2069 // used_words_slow() includes the overhead in each |
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2070 // Metachunk so include it in the used when the |
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2071 // Metachunk is first added (so only added once per |
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2072 // Metachunk). |
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2073 MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
10183
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2074 } |
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2075 |
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2076 void SpaceManager::inc_used_metrics(size_t words) { |
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2077 // Add to the per SpaceManager total |
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2078 Atomic::add_ptr(words, &_allocated_blocks_words); |
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2079 // Add to the global total |
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2080 MetaspaceAux::inc_used(mdtype(), words); |
10183
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2081 } |
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|
2082 |
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2083 void SpaceManager::dec_total_from_size_metrics() { |
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2084 MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
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2085 MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
10183
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2086 // Also deduct the overhead per Metachunk |
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2087 MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
10183
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2088 } |
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|
2089 |
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2090 void SpaceManager::initialize() { |
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2091 Metadebug::init_allocation_fail_alot_count(); |
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2092 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2093 _chunks_in_use[i] = NULL; |
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2094 } |
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2095 _current_chunk = NULL; |
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2096 if (TraceMetadataChunkAllocation && Verbose) { |
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2097 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2098 } |
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2099 } |
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|
2100 |
10101
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|
2101 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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2102 if (chunks == NULL) { |
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|
2103 return; |
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|
2104 } |
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|
2105 ChunkList* list = free_chunks(index); |
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2106 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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2107 assert_lock_strong(SpaceManager::expand_lock()); |
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2108 Metachunk* cur = chunks; |
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2109 |
10175 | 2110 // This returns chunks one at a time. If a new |
10101
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2111 // class List can be created that is a base class |
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2112 // of FreeList then something like FreeList::prepend() |
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2113 // can be used in place of this loop |
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2114 while (cur != NULL) { |
10175 | 2115 assert(cur->container() != NULL, "Container should have been set"); |
2116 cur->container()->dec_container_count(); | |
10101
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2117 // Capture the next link before it is changed |
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2118 // by the call to return_chunk_at_head(); |
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2119 Metachunk* next = cur->next(); |
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|
2120 cur->set_is_free(true); |
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|
2121 list->return_chunk_at_head(cur); |
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|
2122 cur = next; |
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|
2123 } |
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|
2124 } |
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|
2125 |
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2126 SpaceManager::~SpaceManager() { |
8784
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2127 // This call this->_lock which can't be done while holding expand_lock() |
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2128 assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
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2129 err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
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2130 " allocated_chunks_words() " SIZE_FORMAT, |
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2131 sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
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|
2132 |
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2133 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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|
2134 Mutex::_no_safepoint_check_flag); |
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2135 |
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|
2136 ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
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2137 |
6969
6bc207d87e5d
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|
2138 chunk_manager->slow_locked_verify(); |
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2139 |
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|
2140 dec_total_from_size_metrics(); |
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2141 |
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2142 if (TraceMetadataChunkAllocation && Verbose) { |
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|
2143 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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|
2144 locked_print_chunks_in_use_on(gclog_or_tty); |
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|
2145 } |
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2146 |
10175 | 2147 // Do not mangle freed Metachunks. The chunk size inside Metachunks |
2148 // is during the freeing of a VirtualSpaceNodes. | |
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2149 |
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2150 // Have to update before the chunks_in_use lists are emptied |
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2151 // below. |
10183
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2152 chunk_manager->inc_free_chunks_total(allocated_chunks_words(), |
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2153 sum_count_in_chunks_in_use()); |
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2154 |
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2155 // Add all the chunks in use by this space manager |
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2156 // to the global list of free chunks. |
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2157 |
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2158 // Follow each list of chunks-in-use and add them to the |
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2159 // free lists. Each list is NULL terminated. |
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2160 |
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2161 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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2162 if (TraceMetadataChunkAllocation && Verbose) { |
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2163 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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2164 sum_count_in_chunks_in_use(i), |
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2165 chunk_size_name(i)); |
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2166 } |
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2167 Metachunk* chunks = chunks_in_use(i); |
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2168 chunk_manager->return_chunks(i, chunks); |
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2169 set_chunks_in_use(i, NULL); |
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2170 if (TraceMetadataChunkAllocation && Verbose) { |
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2171 gclog_or_tty->print_cr("updated freelist count %d %s", |
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2172 chunk_manager->free_chunks(i)->count(), |
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2173 chunk_size_name(i)); |
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2174 } |
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2175 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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2176 } |
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2177 |
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2178 // The medium chunk case may be optimized by passing the head and |
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2179 // tail of the medium chunk list to add_at_head(). The tail is often |
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2180 // the current chunk but there are probably exceptions. |
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2181 |
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2182 // Humongous chunks |
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2183 if (TraceMetadataChunkAllocation && Verbose) { |
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2184 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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2185 sum_count_in_chunks_in_use(HumongousIndex), |
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2186 chunk_size_name(HumongousIndex)); |
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2187 gclog_or_tty->print("Humongous chunk dictionary: "); |
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2188 } |
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2189 // Humongous chunks are never the current chunk. |
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2190 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2191 |
6885 | 2192 while (humongous_chunks != NULL) { |
2193 #ifdef ASSERT | |
2194 humongous_chunks->set_is_free(true); | |
2195 #endif | |
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2196 if (TraceMetadataChunkAllocation && Verbose) { |
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2197 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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2198 humongous_chunks, |
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2199 humongous_chunks->word_size()); |
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2200 } |
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2201 assert(humongous_chunks->word_size() == (size_t) |
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2202 align_size_up(humongous_chunks->word_size(), |
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2203 HumongousChunkGranularity), |
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2204 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
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2205 " granularity %d", |
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2206 humongous_chunks->word_size(), HumongousChunkGranularity)); |
6885 | 2207 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
10175 | 2208 humongous_chunks->container()->dec_container_count(); |
6885 | 2209 chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); |
2210 humongous_chunks = next_humongous_chunks; | |
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2211 } |
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2212 if (TraceMetadataChunkAllocation && Verbose) { |
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2213 gclog_or_tty->print_cr(""); |
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2214 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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2215 chunk_manager->humongous_dictionary()->total_count(), |
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2216 chunk_size_name(HumongousIndex)); |
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2217 } |
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2218 chunk_manager->slow_locked_verify(); |
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2219 } |
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2220 |
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2221 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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2222 switch (index) { |
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2223 case SpecializedIndex: |
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2224 return "Specialized"; |
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2225 case SmallIndex: |
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2226 return "Small"; |
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2227 case MediumIndex: |
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2228 return "Medium"; |
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2229 case HumongousIndex: |
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2230 return "Humongous"; |
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2231 default: |
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2232 return NULL; |
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2233 } |
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2234 } |
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2235 |
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2236 ChunkIndex ChunkManager::list_index(size_t size) { |
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2237 switch (size) { |
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2238 case SpecializedChunk: |
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2239 assert(SpecializedChunk == ClassSpecializedChunk, |
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2240 "Need branch for ClassSpecializedChunk"); |
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2241 return SpecializedIndex; |
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2242 case SmallChunk: |
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2243 case ClassSmallChunk: |
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2244 return SmallIndex; |
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2245 case MediumChunk: |
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2246 case ClassMediumChunk: |
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2247 return MediumIndex; |
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2248 default: |
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2249 assert(size > MediumChunk || size > ClassMediumChunk, |
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2250 "Not a humongous chunk"); |
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2251 return HumongousIndex; |
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2252 } |
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2253 } |
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2254 |
6885 | 2255 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2256 assert_lock_strong(_lock); |
6885 | 2257 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
2258 assert(word_size >= min_size, | |
2259 err_msg("Should not deallocate dark matter " SIZE_FORMAT, word_size)); | |
2260 block_freelists()->return_block(p, word_size); | |
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2261 } |
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2262 |
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2263 // Adds a chunk to the list of chunks in use. |
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2264 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2265 |
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2266 assert(new_chunk != NULL, "Should not be NULL"); |
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2267 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2268 |
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2269 new_chunk->reset_empty(); |
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2270 |
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2271 // Find the correct list and and set the current |
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2272 // chunk for that list. |
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2273 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2274 |
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2275 if (index != HumongousIndex) { |
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2276 set_current_chunk(new_chunk); |
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2277 new_chunk->set_next(chunks_in_use(index)); |
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2278 set_chunks_in_use(index, new_chunk); |
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2279 } else { |
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2280 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2281 // small, so small will be null. Link this first chunk as the current |
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2282 // chunk. |
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|
2283 if (make_current) { |
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2284 // Set as the current chunk but otherwise treat as a humongous chunk. |
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2285 set_current_chunk(new_chunk); |
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|
2286 } |
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2287 // Link at head. The _current_chunk only points to a humongous chunk for |
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2288 // the null class loader metaspace (class and data virtual space managers) |
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2289 // any humongous chunks so will not point to the tail |
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2290 // of the humongous chunks list. |
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2291 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2292 set_chunks_in_use(HumongousIndex, new_chunk); |
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2293 |
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2294 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
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2295 } |
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2296 |
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2297 // Add to the running sum of capacity |
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2298 inc_size_metrics(new_chunk->word_size()); |
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2299 |
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2300 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2301 if (TraceMetadataChunkAllocation && Verbose) { |
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2302 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2303 sum_count_in_chunks_in_use()); |
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2304 new_chunk->print_on(gclog_or_tty); |
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2305 if (vs_list() != NULL) { |
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2306 vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
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2307 } |
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2308 } |
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2309 } |
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2310 |
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2311 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
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2312 size_t grow_chunks_by_words) { |
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2313 |
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2314 Metachunk* next = vs_list()->get_new_chunk(word_size, |
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2315 grow_chunks_by_words, |
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2316 medium_chunk_bunch()); |
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2317 |
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2318 if (TraceMetadataHumongousAllocation && |
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2319 SpaceManager::is_humongous(next->word_size())) { |
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2320 gclog_or_tty->print_cr(" new humongous chunk word size " PTR_FORMAT, |
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2321 next->word_size()); |
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|
2322 } |
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|
2323 |
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2324 return next; |
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|
2325 } |
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|
2326 |
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2327 MetaWord* SpaceManager::allocate(size_t word_size) { |
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2328 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2329 |
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2330 size_t raw_word_size = get_raw_word_size(word_size); |
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2331 BlockFreelist* fl = block_freelists(); |
6885 | 2332 MetaWord* p = NULL; |
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2333 // Allocation from the dictionary is expensive in the sense that |
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2334 // the dictionary has to be searched for a size. Don't allocate |
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2335 // from the dictionary until it starts to get fat. Is this |
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2336 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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2337 // for allocations. Do some profiling. JJJ |
6885 | 2338 if (fl->total_size() > allocation_from_dictionary_limit) { |
2339 p = fl->get_block(raw_word_size); | |
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2340 } |
6885 | 2341 if (p == NULL) { |
2342 p = allocate_work(raw_word_size); | |
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2343 } |
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2344 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
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2345 |
6885 | 2346 return p; |
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|
2347 } |
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|
2348 |
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2349 // Returns the address of spaced allocated for "word_size". |
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2350 // This methods does not know about blocks (Metablocks) |
6885 | 2351 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
6725
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|
2352 assert_lock_strong(_lock); |
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|
2353 #ifdef ASSERT |
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|
2354 if (Metadebug::test_metadata_failure()) { |
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|
2355 return NULL; |
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|
2356 } |
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|
2357 #endif |
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|
2358 // Is there space in the current chunk? |
6885 | 2359 MetaWord* result = NULL; |
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|
2360 |
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2361 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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|
2362 // never null because we gave it the size we wanted. Caller reports out |
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|
2363 // of memory if this returns null. |
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|
2364 if (DumpSharedSpaces) { |
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|
2365 assert(current_chunk() != NULL, "should never happen"); |
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2366 inc_used_metrics(word_size); |
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2367 return current_chunk()->allocate(word_size); // caller handles null result |
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|
2368 } |
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|
2369 if (current_chunk() != NULL) { |
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|
2370 result = current_chunk()->allocate(word_size); |
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|
2371 } |
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|
2372 |
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|
2373 if (result == NULL) { |
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|
2374 result = grow_and_allocate(word_size); |
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|
2375 } |
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2376 if (result > 0) { |
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2377 inc_used_metrics(word_size); |
6885 | 2378 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2379 "Head of the list is being allocated"); | |
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|
2380 } |
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|
2381 |
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|
2382 return result; |
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|
2383 } |
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|
2384 |
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|
2385 void SpaceManager::verify() { |
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|
2386 // If there are blocks in the dictionary, then |
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|
2387 // verfication of chunks does not work since |
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|
2388 // being in the dictionary alters a chunk. |
6885 | 2389 if (block_freelists()->total_size() == 0) { |
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2390 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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|
2391 Metachunk* curr = chunks_in_use(i); |
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|
2392 while (curr != NULL) { |
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|
2393 curr->verify(); |
7208
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2394 verify_chunk_size(curr); |
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|
2395 curr = curr->next(); |
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|
2396 } |
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|
2397 } |
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|
2398 } |
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|
2399 } |
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|
2400 |
7208
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|
2401 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
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|
2402 assert(is_humongous(chunk->word_size()) || |
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2403 chunk->word_size() == medium_chunk_size() || |
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2404 chunk->word_size() == small_chunk_size() || |
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|
2405 chunk->word_size() == specialized_chunk_size(), |
7208
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|
2406 "Chunk size is wrong"); |
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|
2407 return; |
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7187
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|
2408 } |
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|
2409 |
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|
2410 #ifdef ASSERT |
10183
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|
2411 void SpaceManager::verify_allocated_blocks_words() { |
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|
2412 // Verification is only guaranteed at a safepoint. |
10183
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|
2413 assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
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|
2414 "Verification can fail if the applications is running"); |
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2415 assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
8007
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|
2416 err_msg("allocation total is not consistent " SIZE_FORMAT |
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|
2417 " vs " SIZE_FORMAT, |
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2418 allocated_blocks_words(), sum_used_in_chunks_in_use())); |
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|
2419 } |
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|
2420 |
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|
2421 #endif |
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|
2422 |
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|
2423 void SpaceManager::dump(outputStream* const out) const { |
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|
2424 size_t curr_total = 0; |
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|
2425 size_t waste = 0; |
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|
2426 uint i = 0; |
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|
2427 size_t used = 0; |
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|
2428 size_t capacity = 0; |
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|
2429 |
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|
2430 // Add up statistics for all chunks in this SpaceManager. |
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|
2431 for (ChunkIndex index = ZeroIndex; |
6885 | 2432 index < NumberOfInUseLists; |
6725
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|
2433 index = next_chunk_index(index)) { |
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|
2434 for (Metachunk* curr = chunks_in_use(index); |
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|
2435 curr != NULL; |
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|
2436 curr = curr->next()) { |
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|
2437 out->print("%d) ", i++); |
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|
2438 curr->print_on(out); |
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|
2439 if (TraceMetadataChunkAllocation && Verbose) { |
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|
2440 block_freelists()->print_on(out); |
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|
2441 } |
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|
2442 curr_total += curr->word_size(); |
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|
2443 used += curr->used_word_size(); |
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|
2444 capacity += curr->capacity_word_size(); |
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|
2445 waste += curr->free_word_size() + curr->overhead();; |
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|
2446 } |
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|
2447 } |
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|
2448 |
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|
2449 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
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|
2450 // Free space isn't wasted. |
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|
2451 waste -= free; |
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|
2452 |
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|
2453 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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|
2454 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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|
2455 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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|
2456 } |
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|
2457 |
7185
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|
2458 #ifndef PRODUCT |
6725
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|
2459 void SpaceManager::mangle_freed_chunks() { |
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|
2460 for (ChunkIndex index = ZeroIndex; |
6885 | 2461 index < NumberOfInUseLists; |
6725
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|
2462 index = next_chunk_index(index)) { |
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|
2463 for (Metachunk* curr = chunks_in_use(index); |
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|
2464 curr != NULL; |
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|
2465 curr = curr->next()) { |
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|
2466 curr->mangle(); |
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|
2467 } |
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|
2468 } |
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|
2469 } |
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|
2470 #endif // PRODUCT |
6725
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|
2471 |
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|
2472 // MetaspaceAux |
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|
2473 |
10183
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|
2474 |
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|
2475 size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
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|
2476 size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
10183
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|
2477 |
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|
2478 size_t MetaspaceAux::free_bytes() { |
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|
2479 size_t result = 0; |
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|
2480 if (Metaspace::class_space_list() != NULL) { |
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|
2481 result = result + Metaspace::class_space_list()->free_bytes(); |
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|
2482 } |
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|
2483 if (Metaspace::space_list() != NULL) { |
868d87ed63c8
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|
2484 result = result + Metaspace::space_list()->free_bytes(); |
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|
2485 } |
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|
2486 return result; |
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|
2487 } |
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|
2488 |
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|
2489 void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2490 assert_lock_strong(SpaceManager::expand_lock()); |
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10191
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|
2491 assert(words <= allocated_capacity_words(mdtype), |
10183
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|
2492 err_msg("About to decrement below 0: words " SIZE_FORMAT |
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|
2493 " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
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10191
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|
2494 words, mdtype, allocated_capacity_words(mdtype))); |
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|
2495 _allocated_capacity_words[mdtype] -= words; |
10183
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|
2496 } |
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|
2497 |
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|
2498 void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2499 assert_lock_strong(SpaceManager::expand_lock()); |
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|
2500 // Needs to be atomic |
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|
2501 _allocated_capacity_words[mdtype] += words; |
10183
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|
2502 } |
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|
2503 |
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|
2504 void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
2b1a9d972fc2
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|
2505 assert(words <= allocated_used_words(mdtype), |
10183
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|
2506 err_msg("About to decrement below 0: words " SIZE_FORMAT |
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|
2507 " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
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|
2508 words, mdtype, allocated_used_words(mdtype))); |
10183
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|
2509 // For CMS deallocation of the Metaspaces occurs during the |
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|
2510 // sweep which is a concurrent phase. Protection by the expand_lock() |
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|
2511 // is not enough since allocation is on a per Metaspace basis |
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|
2512 // and protected by the Metaspace lock. |
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|
2513 jlong minus_words = (jlong) - (jlong) words; |
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|
2514 Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
10183
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|
2515 } |
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|
2516 |
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|
2517 void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2518 // _allocated_used_words tracks allocations for |
868d87ed63c8
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|
2519 // each piece of metadata. Those allocations are |
868d87ed63c8
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|
2520 // generally done concurrently by different application |
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|
2521 // threads so must be done atomically. |
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|
2522 Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
10183
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|
2523 } |
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|
2524 |
868d87ed63c8
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|
2525 size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
6730
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6726
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|
2526 size_t used = 0; |
5d2156bcb78b
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|
2527 ClassLoaderDataGraphMetaspaceIterator iter; |
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|
2528 while (iter.repeat()) { |
5d2156bcb78b
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|
2529 Metaspace* msp = iter.get_next(); |
10183
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|
2530 // Sum allocated_blocks_words for each metaspace |
6730
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|
2531 if (msp != NULL) { |
10183
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|
2532 used += msp->used_words_slow(mdtype); |
6730
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|
2533 } |
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7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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|
2534 } |
5d2156bcb78b
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|
2535 return used * BytesPerWord; |
5d2156bcb78b
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|
2536 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2537 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2538 size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2539 size_t free = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2540 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2541 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2542 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2543 if (msp != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2544 free += msp->free_words(mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2545 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2546 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2547 return free * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2548 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2549 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2550 size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2551 // Don't count the space in the freelists. That space will be |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2552 // added to the capacity calculation as needed. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2553 size_t capacity = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2554 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2555 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2556 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2557 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2558 capacity += msp->capacity_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2559 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2560 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2561 return capacity * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2562 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2563 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2564 size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2565 size_t reserved = (mdtype == Metaspace::ClassType) ? |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2566 Metaspace::class_space_list()->virtual_space_total() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2567 Metaspace::space_list()->virtual_space_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2568 return reserved * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2569 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2570 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2571 size_t MetaspaceAux::min_chunk_size() { return Metaspace::first_chunk_word_size(); } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2572 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2573 size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2574 ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2575 Metaspace::class_space_list()->chunk_manager() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2576 Metaspace::space_list()->chunk_manager(); |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2577 chunk->slow_verify(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2578 return chunk->free_chunks_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2579 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2580 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2581 size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2582 return free_chunks_total(mdtype) * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2583 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2584 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2585 size_t MetaspaceAux::free_chunks_total() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2586 return free_chunks_total(Metaspace::ClassType) + |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2587 free_chunks_total(Metaspace::NonClassType); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2588 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2589 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2590 size_t MetaspaceAux::free_chunks_total_in_bytes() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2591 return free_chunks_total() * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2592 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2593 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2594 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2595 gclog_or_tty->print(", [Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2596 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2597 gclog_or_tty->print(" " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2598 "->" SIZE_FORMAT |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2599 "(" SIZE_FORMAT ")", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2600 prev_metadata_used, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2601 allocated_used_bytes(), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2602 reserved_in_bytes()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2603 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2604 gclog_or_tty->print(" " SIZE_FORMAT "K" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2605 "->" SIZE_FORMAT "K" |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2606 "(" SIZE_FORMAT "K)", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2607 prev_metadata_used / K, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2608 allocated_used_bytes() / K, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2609 reserved_in_bytes()/ K); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2610 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2611 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2612 gclog_or_tty->print("]"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2613 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2614 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2615 // This is printed when PrintGCDetails |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2616 void MetaspaceAux::print_on(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2617 Metaspace::MetadataType ct = Metaspace::ClassType; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2618 Metaspace::MetadataType nct = Metaspace::NonClassType; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2619 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2620 out->print_cr(" Metaspace total " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2621 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2622 " reserved " SIZE_FORMAT "K", |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2623 allocated_capacity_bytes()/K, allocated_used_bytes()/K, reserved_in_bytes()/K); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2624 |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2625 out->print_cr(" data space " |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2626 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2627 " reserved " SIZE_FORMAT "K", |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2628 allocated_capacity_bytes(nct)/K, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2629 allocated_used_bytes(nct)/K, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2630 reserved_in_bytes(nct)/K); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2631 out->print_cr(" class space " |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2632 SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2633 " reserved " SIZE_FORMAT "K", |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2634 allocated_capacity_bytes(ct)/K, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2635 allocated_used_bytes(ct)/K, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2636 reserved_in_bytes(ct)/K); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2637 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2638 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2639 // Print information for class space and data space separately. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2640 // This is almost the same as above. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2641 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2642 size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2643 size_t capacity_bytes = capacity_bytes_slow(mdtype); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2644 size_t used_bytes = used_bytes_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2645 size_t free_bytes = free_in_bytes(mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2646 size_t used_and_free = used_bytes + free_bytes + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2647 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2648 out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2649 "K + unused in chunks " SIZE_FORMAT "K + " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2650 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2651 "K capacity in allocated chunks " SIZE_FORMAT "K", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2652 used_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2653 free_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2654 free_chunks_capacity_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2655 used_and_free / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2656 capacity_bytes / K); |
8738
1c88b99a2b01
8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation
mgerdin
parents:
8040
diff
changeset
|
2657 // Accounting can only be correct if we got the values during a safepoint |
1c88b99a2b01
8009282: Assertion "assert(used_and_free == capacity_bytes) failed: Accounting is wrong" failed with -XX:+Verbose -XX:+TraceMetadataChunkAllocation
mgerdin
parents:
8040
diff
changeset
|
2658 assert(!SafepointSynchronize::is_at_safepoint() || used_and_free == capacity_bytes, "Accounting is wrong"); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2659 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2660 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2661 // Print total fragmentation for class and data metaspaces separately |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2662 void MetaspaceAux::print_waste(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2663 |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2664 size_t specialized_waste = 0, small_waste = 0, medium_waste = 0; |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2665 size_t specialized_count = 0, small_count = 0, medium_count = 0, humongous_count = 0; |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2666 size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0; |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2667 size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_humongous_count = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2668 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2669 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2670 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2671 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2672 if (msp != NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2673 specialized_waste += msp->vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2674 specialized_count += msp->vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2675 small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2676 small_count += msp->vsm()->sum_count_in_chunks_in_use(SmallIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2677 medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2678 medium_count += msp->vsm()->sum_count_in_chunks_in_use(MediumIndex); |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2679 humongous_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2680 |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2681 cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2682 cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2683 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2684 cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2685 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2686 cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2687 cls_humongous_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2688 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2689 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2690 out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2691 out->print_cr(" data: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2692 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2693 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2694 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2695 specialized_count, specialized_waste, small_count, |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2696 small_waste, medium_count, medium_waste, humongous_count); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2697 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2698 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2699 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2700 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2701 cls_specialized_count, cls_specialized_waste, |
11064
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2702 cls_small_count, cls_small_waste, |
de2d15ce3d4a
8015391: NPG: With -XX:+UseCompressedKlassPointers OOME due to exhausted metadata space could occur when metaspace is almost empty
coleenp
parents:
10376
diff
changeset
|
2703 cls_medium_count, cls_medium_waste, cls_humongous_count); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2704 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2705 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2706 // Dump global metaspace things from the end of ClassLoaderDataGraph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2707 void MetaspaceAux::dump(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2708 out->print_cr("All Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2709 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2710 out->print("class space: "); print_on(out, Metaspace::ClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2711 print_waste(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2712 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2713 |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2714 void MetaspaceAux::verify_free_chunks() { |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2715 Metaspace::space_list()->chunk_manager()->verify(); |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2716 Metaspace::class_space_list()->chunk_manager()->verify(); |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2717 } |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2718 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2719 void MetaspaceAux::verify_capacity() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2720 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2721 size_t running_sum_capacity_bytes = allocated_capacity_bytes(); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2722 // For purposes of the running sum of capacity, verify against capacity |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2723 size_t capacity_in_use_bytes = capacity_bytes_slow(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2724 assert(running_sum_capacity_bytes == capacity_in_use_bytes, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2725 err_msg("allocated_capacity_words() * BytesPerWord " SIZE_FORMAT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2726 " capacity_bytes_slow()" SIZE_FORMAT, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2727 running_sum_capacity_bytes, capacity_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2728 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2729 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2730 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2731 size_t capacity_in_use_bytes = capacity_bytes_slow(i); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2732 assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2733 err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2734 " capacity_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2735 i, allocated_capacity_bytes(i), i, capacity_in_use_bytes)); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2736 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2737 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2738 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2739 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2740 void MetaspaceAux::verify_used() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2741 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2742 size_t running_sum_used_bytes = allocated_used_bytes(); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2743 // For purposes of the running sum of used, verify against used |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2744 size_t used_in_use_bytes = used_bytes_slow(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2745 assert(allocated_used_bytes() == used_in_use_bytes, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2746 err_msg("allocated_used_bytes() " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2747 " used_bytes_slow()" SIZE_FORMAT, |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2748 allocated_used_bytes(), used_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2749 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2750 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2751 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2752 size_t used_in_use_bytes = used_bytes_slow(i); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2753 assert(allocated_used_bytes(i) == used_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2754 err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2755 " used_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2756 i, allocated_used_bytes(i), i, used_in_use_bytes)); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2757 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2758 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2759 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2760 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2761 void MetaspaceAux::verify_metrics() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2762 verify_capacity(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2763 verify_used(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2764 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2765 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2766 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2767 // Metaspace methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2768 |
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2769 size_t Metaspace::_first_chunk_word_size = 0; |
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2770 size_t Metaspace::_first_class_chunk_word_size = 0; |
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2771 |
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2772 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
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2773 initialize(lock, type); |
6725
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2774 } |
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2775 |
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2776 Metaspace::~Metaspace() { |
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2777 delete _vsm; |
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2778 delete _class_vsm; |
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2779 } |
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2780 |
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2781 VirtualSpaceList* Metaspace::_space_list = NULL; |
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2782 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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2783 |
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2784 #define VIRTUALSPACEMULTIPLIER 2 |
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2785 |
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2786 void Metaspace::global_initialize() { |
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2787 // Initialize the alignment for shared spaces. |
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2788 int max_alignment = os::vm_page_size(); |
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2789 MetaspaceShared::set_max_alignment(max_alignment); |
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2790 |
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2791 if (DumpSharedSpaces) { |
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2792 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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2793 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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2794 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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2795 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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2796 |
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2797 // Initialize with the sum of the shared space sizes. The read-only |
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2798 // and read write metaspace chunks will be allocated out of this and the |
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2799 // remainder is the misc code and data chunks. |
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2800 size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
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2801 SharedMiscDataSize + SharedMiscCodeSize, |
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2802 os::vm_allocation_granularity()); |
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2803 size_t word_size = total/wordSize; |
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2804 _space_list = new VirtualSpaceList(word_size); |
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2805 } else { |
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2806 // If using shared space, open the file that contains the shared space |
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2807 // and map in the memory before initializing the rest of metaspace (so |
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2808 // the addresses don't conflict) |
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|
2809 if (UseSharedSpaces) { |
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|
2810 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
2811 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
2812 |
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2813 // Open the shared archive file, read and validate the header. If |
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2814 // initialization fails, shared spaces [UseSharedSpaces] are |
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|
2815 // disabled and the file is closed. |
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|
2816 // Map in spaces now also |
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2817 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
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2818 FileMapInfo::set_current_info(mapinfo); |
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|
2819 } else { |
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2820 assert(!mapinfo->is_open() && !UseSharedSpaces, |
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2821 "archive file not closed or shared spaces not disabled."); |
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|
2822 } |
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|
2823 } |
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|
2824 |
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2825 // Initialize these before initializing the VirtualSpaceList |
6725
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2826 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
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2827 _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
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2828 // Make the first class chunk bigger than a medium chunk so it's not put |
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2829 // on the medium chunk list. The next chunk will be small and progress |
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2830 // from there. This size calculated by -version. |
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2831 _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
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2832 (ClassMetaspaceSize/BytesPerWord)*2); |
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2833 _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
6725
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2834 // Arbitrarily set the initial virtual space to a multiple |
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2835 // of the boot class loader size. |
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2836 size_t word_size = VIRTUALSPACEMULTIPLIER * first_chunk_word_size(); |
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|
2837 // Initialize the list of virtual spaces. |
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|
2838 _space_list = new VirtualSpaceList(word_size); |
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|
2839 } |
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|
2840 } |
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|
2841 |
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|
2842 // For UseCompressedKlassPointers the class space is reserved as a piece of the |
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|
2843 // Java heap because the compression algorithm is the same for each. The |
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diff
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|
2844 // argument passed in is at the top of the compressed space |
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|
2845 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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|
2846 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
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|
2847 assert(rs.size() >= ClassMetaspaceSize, |
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
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|
2848 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), ClassMetaspaceSize)); |
6725
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2849 _class_space_list = new VirtualSpaceList(rs); |
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|
2850 } |
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|
2851 |
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|
2852 void Metaspace::initialize(Mutex* lock, |
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|
2853 MetaspaceType type) { |
6725
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|
2854 |
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|
2855 assert(space_list() != NULL, |
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|
2856 "Metadata VirtualSpaceList has not been initialized"); |
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|
2857 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
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|
2858 _vsm = new SpaceManager(Metaspace::NonClassType, lock, space_list()); |
6725
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|
2859 if (_vsm == NULL) { |
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|
2860 return; |
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diff
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|
2861 } |
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|
2862 size_t word_size; |
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|
2863 size_t class_word_size; |
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|
2864 vsm()->get_initial_chunk_sizes(type, |
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|
2865 &word_size, |
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|
2866 &class_word_size); |
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|
2867 |
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|
2868 assert(class_space_list() != NULL, |
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|
2869 "Class VirtualSpaceList has not been initialized"); |
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|
2870 |
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|
2871 // Allocate SpaceManager for classes. |
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diff
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|
2872 _class_vsm = new SpaceManager(Metaspace::ClassType, lock, class_space_list()); |
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|
2873 if (_class_vsm == NULL) { |
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|
2874 return; |
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diff
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|
2875 } |
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|
2876 |
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|
2877 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
2878 |
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|
2879 // Allocate chunk for metadata objects |
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|
2880 Metachunk* new_chunk = |
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|
2881 space_list()->get_initialization_chunk(word_size, |
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|
2882 vsm()->medium_chunk_bunch()); |
6725
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|
2883 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
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diff
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|
2884 if (new_chunk != NULL) { |
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|
2885 // Add to this manager's list of chunks in use and current_chunk(). |
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|
2886 vsm()->add_chunk(new_chunk, true); |
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|
2887 } |
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|
2888 |
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diff
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|
2889 // Allocate chunk for class metadata objects |
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|
2890 Metachunk* class_chunk = |
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|
2891 class_space_list()->get_initialization_chunk(class_word_size, |
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|
2892 class_vsm()->medium_chunk_bunch()); |
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diff
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|
2893 if (class_chunk != NULL) { |
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|
2894 class_vsm()->add_chunk(class_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2895 } |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
2896 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
2897 _alloc_record_head = NULL; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
2898 _alloc_record_tail = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2899 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2900 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2901 size_t Metaspace::align_word_size_up(size_t word_size) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2902 size_t byte_size = word_size * wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2903 return ReservedSpace::allocation_align_size_up(byte_size) / wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2904 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2905 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2906 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2907 // DumpSharedSpaces doesn't use class metadata area (yet) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2908 if (mdtype == ClassType && !DumpSharedSpaces) { |
6885 | 2909 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2910 } else { |
6885 | 2911 return vsm()->allocate(word_size); |
6725
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 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2915 MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2916 MetaWord* result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2917 MetaspaceGC::set_expand_after_GC(true); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2918 size_t before_inc = MetaspaceGC::capacity_until_GC(); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2919 size_t delta_bytes = MetaspaceGC::delta_capacity_until_GC(word_size) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2920 MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2921 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2922 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2923 " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2924 } |
6885 | 2925 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2926 result = allocate(word_size, mdtype); |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2927 |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2928 return result; |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2929 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
2930 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2931 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2932 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2933 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2934 assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2935 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2936 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2937 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2938 size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2939 // return vsm()->allocated_used_words(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2940 return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2941 vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2942 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2943 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2944 size_t Metaspace::free_words(MetadataType mdtype) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2945 return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2946 vsm()->sum_free_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2947 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2948 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2949 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2950 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2951 // 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
|
2952 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2953 // is already counted in some chunk. |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2954 size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2955 return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2956 vsm()->sum_capacity_in_chunks_in_use(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2957 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2958 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2959 size_t Metaspace::used_bytes_slow(MetadataType mdtype) const { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2960 return used_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2961 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2962 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2963 size_t Metaspace::capacity_bytes_slow(MetadataType mdtype) const { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2964 return capacity_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2965 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2966 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2967 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
|
2968 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2969 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 2970 // Don't take Heap_lock |
10191
601183f604b2
8013129: Possible deadlock with Metaspace locks due to mixed usage of safepoint aware and non-safepoint aware locking
mgerdin
parents:
10183
diff
changeset
|
2971 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6885 | 2972 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
2973 // Dark matter. Too small for dictionary. | |
2974 #ifdef ASSERT | |
2975 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2976 #endif | |
2977 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2978 } |
6885 | 2979 if (is_class) { |
2980 class_vsm()->deallocate(ptr, word_size); | |
2981 } else { | |
2982 vsm()->deallocate(ptr, word_size); | |
2983 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2984 } else { |
10191
601183f604b2
8013129: Possible deadlock with Metaspace locks due to mixed usage of safepoint aware and non-safepoint aware locking
mgerdin
parents:
10183
diff
changeset
|
2985 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2986 |
6885 | 2987 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
2988 // Dark matter. Too small for dictionary. | |
2989 #ifdef ASSERT | |
2990 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
2991 #endif | |
2992 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2993 } |
6885 | 2994 if (is_class) { |
2995 class_vsm()->deallocate(ptr, word_size); | |
2996 } else { | |
2997 vsm()->deallocate(ptr, word_size); | |
2998 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2999 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3000 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3001 |
6885 | 3002 Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3003 bool read_only, MetaspaceObj::Type type, TRAPS) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3004 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3005 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3006 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3007 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3008 |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3009 MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3010 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3011 // 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
|
3012 MetaWord* result = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3013 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3014 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
|
3015 "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
|
3016 // 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
|
3017 // 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
|
3018 // to revisit this for application class data sharing. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3019 if (DumpSharedSpaces) { |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3020 assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3021 Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3022 result = space->allocate(word_size, NonClassType); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3023 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3024 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3025 } else { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3026 space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3027 } |
6885 | 3028 return Metablock::initialize(result, word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3029 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3030 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3031 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
|
3032 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3033 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3034 // Try to clean out some memory and retry. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3035 result = |
6885 | 3036 Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3037 loader_data, word_size, mdtype); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3038 |
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3039 // If result is still null, we are out of memory. |
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3040 if (result == NULL) { |
7446
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3041 if (Verbose && TraceMetadataChunkAllocation) { |
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3042 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
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3043 SIZE_FORMAT, word_size); |
11064
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3044 if (loader_data->metaspace_or_null() != NULL) loader_data->dump(gclog_or_tty); |
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3045 MetaspaceAux::dump(gclog_or_tty); |
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3046 } |
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3047 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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3048 const char* space_string = (mdtype == ClassType) ? "Class Metadata space" : |
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3049 "Metadata space"; |
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3050 report_java_out_of_memory(space_string); |
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3051 |
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3052 if (JvmtiExport::should_post_resource_exhausted()) { |
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3053 JvmtiExport::post_resource_exhausted( |
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3054 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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3055 space_string); |
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3056 } |
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3057 if (mdtype == ClassType) { |
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3058 THROW_OOP_0(Universe::out_of_memory_error_class_metaspace()); |
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3059 } else { |
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3060 THROW_OOP_0(Universe::out_of_memory_error_metaspace()); |
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3061 } |
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3062 } |
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3063 } |
6885 | 3064 return Metablock::initialize(result, word_size); |
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3065 } |
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3066 |
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3067 void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
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3068 assert(DumpSharedSpaces, "sanity"); |
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3069 |
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3070 AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
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3071 if (_alloc_record_head == NULL) { |
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3072 _alloc_record_head = _alloc_record_tail = rec; |
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3073 } else { |
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3074 _alloc_record_tail->_next = rec; |
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3075 _alloc_record_tail = rec; |
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3076 } |
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3077 } |
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3078 |
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3079 void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
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3080 assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
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3081 |
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3082 address last_addr = (address)bottom(); |
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3083 |
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3084 for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
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3085 address ptr = rec->_ptr; |
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3086 if (last_addr < ptr) { |
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3087 closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
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3088 } |
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3089 closure->doit(ptr, rec->_type, rec->_byte_size); |
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3090 last_addr = ptr + rec->_byte_size; |
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3091 } |
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3092 |
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3093 address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
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3094 if (last_addr < top) { |
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3095 closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
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3096 } |
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3097 } |
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3098 |
10175 | 3099 void Metaspace::purge() { |
3100 MutexLockerEx cl(SpaceManager::expand_lock(), | |
3101 Mutex::_no_safepoint_check_flag); | |
3102 space_list()->purge(); | |
3103 class_space_list()->purge(); | |
3104 } | |
3105 | |
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3106 void Metaspace::print_on(outputStream* out) const { |
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3107 // Print both class virtual space counts and metaspace. |
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3108 if (Verbose) { |
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3109 vsm()->print_on(out); |
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3110 class_vsm()->print_on(out); |
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3111 } |
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3112 } |
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3113 |
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3114 bool Metaspace::contains(const void * ptr) { |
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3115 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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3116 return true; |
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3117 } |
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3118 // This is checked while unlocked. As long as the virtualspaces are added |
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3119 // at the end, the pointer will be in one of them. The virtual spaces |
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3120 // aren't deleted presently. When they are, some sort of locking might |
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3121 // be needed. Note, locking this can cause inversion problems with the |
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3122 // caller in MetaspaceObj::is_metadata() function. |
10175 | 3123 return space_list()->contains(ptr) || |
3124 class_space_list()->contains(ptr); | |
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3125 } |
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3126 |
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3127 void Metaspace::verify() { |
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3128 vsm()->verify(); |
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3129 class_vsm()->verify(); |
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3130 } |
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3131 |
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3132 void Metaspace::dump(outputStream* const out) const { |
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3133 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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3134 vsm()->dump(out); |
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3135 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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3136 class_vsm()->dump(out); |
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3137 } |