Mercurial > hg > truffle
annotate src/share/vm/memory/metaspace.cpp @ 14521:29ccc4cbabca
Merge
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 12 Mar 2014 13:30:08 +0100 |
parents | aa8fab3bed11 |
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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/allocation.hpp" |
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27 #include "memory/binaryTreeDictionary.hpp" |
6885 | 28 #include "memory/freeList.hpp" |
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29 #include "memory/collectorPolicy.hpp" |
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30 #include "memory/filemap.hpp" |
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31 #include "memory/freeList.hpp" |
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32 #include "memory/gcLocker.hpp" |
6885 | 33 #include "memory/metachunk.hpp" |
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34 #include "memory/metaspace.hpp" |
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35 #include "memory/metaspaceShared.hpp" |
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36 #include "memory/resourceArea.hpp" |
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37 #include "memory/universe.hpp" |
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38 #include "runtime/atomic.inline.hpp" |
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39 #include "runtime/globals.hpp" |
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40 #include "runtime/init.hpp" |
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41 #include "runtime/java.hpp" |
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42 #include "runtime/mutex.hpp" |
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43 #include "runtime/orderAccess.hpp" |
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44 #include "services/memTracker.hpp" |
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45 #include "services/memoryService.hpp" |
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46 #include "utilities/copy.hpp" |
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47 #include "utilities/debug.hpp" |
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48 |
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49 typedef BinaryTreeDictionary<Metablock, FreeList<Metablock> > BlockTreeDictionary; |
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50 typedef BinaryTreeDictionary<Metachunk, FreeList<Metachunk> > ChunkTreeDictionary; |
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52 // Set this constant to enable slow integrity checking of the free chunk lists | |
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53 const bool metaspace_slow_verify = false; |
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54 |
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55 size_t const allocation_from_dictionary_limit = 4 * K; |
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56 |
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57 MetaWord* last_allocated = 0; |
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58 |
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59 size_t Metaspace::_compressed_class_space_size; |
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60 |
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61 // Used in declarations in SpaceManager and ChunkManager |
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62 enum ChunkIndex { |
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63 ZeroIndex = 0, |
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64 SpecializedIndex = ZeroIndex, |
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65 SmallIndex = SpecializedIndex + 1, |
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66 MediumIndex = SmallIndex + 1, |
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67 HumongousIndex = MediumIndex + 1, |
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68 NumberOfFreeLists = 3, |
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69 NumberOfInUseLists = 4 |
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70 }; |
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71 |
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72 enum ChunkSizes { // in words. |
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73 ClassSpecializedChunk = 128, |
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74 SpecializedChunk = 128, |
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75 ClassSmallChunk = 256, |
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76 SmallChunk = 512, |
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77 ClassMediumChunk = 4 * K, |
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78 MediumChunk = 8 * K |
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79 }; |
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80 |
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81 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 82 assert(i < NumberOfInUseLists, "Out of bound"); |
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83 return (ChunkIndex) (i+1); |
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84 } |
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85 |
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86 volatile intptr_t MetaspaceGC::_capacity_until_GC = 0; |
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87 uint MetaspaceGC::_shrink_factor = 0; |
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88 bool MetaspaceGC::_should_concurrent_collect = false; |
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89 |
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90 typedef class FreeList<Metachunk> ChunkList; |
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91 |
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92 // Manages the global free lists of chunks. |
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93 class ChunkManager : public CHeapObj<mtInternal> { |
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94 friend class TestVirtualSpaceNodeTest; |
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95 |
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96 // Free list of chunks of different sizes. |
10175 | 97 // SpecializedChunk |
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98 // SmallChunk |
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99 // MediumChunk |
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100 // HumongousChunk |
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102 | |
103 // HumongousChunk | |
104 ChunkTreeDictionary _humongous_dictionary; | |
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105 |
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106 // ChunkManager in all lists of this type |
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107 size_t _free_chunks_total; |
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108 size_t _free_chunks_count; |
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109 |
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110 void dec_free_chunks_total(size_t v) { |
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111 assert(_free_chunks_count > 0 && |
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112 _free_chunks_total > 0, |
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113 "About to go negative"); |
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114 Atomic::add_ptr(-1, &_free_chunks_count); |
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115 jlong minus_v = (jlong) - (jlong) v; |
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116 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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117 } |
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118 |
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119 // Debug support |
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120 |
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121 size_t sum_free_chunks(); |
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122 size_t sum_free_chunks_count(); |
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123 |
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124 void locked_verify_free_chunks_total(); |
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125 void slow_locked_verify_free_chunks_total() { |
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126 if (metaspace_slow_verify) { |
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127 locked_verify_free_chunks_total(); |
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128 } |
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129 } |
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130 void locked_verify_free_chunks_count(); |
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131 void slow_locked_verify_free_chunks_count() { |
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132 if (metaspace_slow_verify) { |
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133 locked_verify_free_chunks_count(); |
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134 } |
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135 } |
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136 void verify_free_chunks_count(); |
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137 |
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138 public: |
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139 |
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140 ChunkManager(size_t specialized_size, size_t small_size, size_t medium_size) |
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141 : _free_chunks_total(0), _free_chunks_count(0) { |
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142 _free_chunks[SpecializedIndex].set_size(specialized_size); |
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143 _free_chunks[SmallIndex].set_size(small_size); |
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144 _free_chunks[MediumIndex].set_size(medium_size); |
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145 } |
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146 |
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147 // add or delete (return) a chunk to the global freelist. |
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148 Metachunk* chunk_freelist_allocate(size_t word_size); |
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149 |
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150 // Map a size to a list index assuming that there are lists |
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151 // for special, small, medium, and humongous chunks. |
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152 static ChunkIndex list_index(size_t size); |
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153 |
10175 | 154 // Remove the chunk from its freelist. It is |
155 // expected to be on one of the _free_chunks[] lists. | |
156 void remove_chunk(Metachunk* chunk); | |
157 | |
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158 // Add the simple linked list of chunks to the freelist of chunks |
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159 // of type index. |
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160 void return_chunks(ChunkIndex index, Metachunk* chunks); |
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161 |
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162 // Total of the space in the free chunks list |
12235 | 163 size_t free_chunks_total_words(); |
164 size_t free_chunks_total_bytes(); | |
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165 |
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166 // Number of chunks in the free chunks list |
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167 size_t free_chunks_count(); |
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168 |
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169 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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170 Atomic::add_ptr(count, &_free_chunks_count); |
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171 Atomic::add_ptr(v, &_free_chunks_total); |
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172 } |
6885 | 173 ChunkTreeDictionary* humongous_dictionary() { |
174 return &_humongous_dictionary; | |
175 } | |
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176 |
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177 ChunkList* free_chunks(ChunkIndex index); |
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178 |
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179 // Returns the list for the given chunk word size. |
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180 ChunkList* find_free_chunks_list(size_t word_size); |
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181 |
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182 // Remove from a list by size. Selects list based on size of chunk. |
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183 Metachunk* free_chunks_get(size_t chunk_word_size); |
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184 |
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185 // Debug support |
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186 void verify(); |
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187 void slow_verify() { |
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188 if (metaspace_slow_verify) { |
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189 verify(); |
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190 } |
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191 } |
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192 void locked_verify(); |
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193 void slow_locked_verify() { |
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194 if (metaspace_slow_verify) { |
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195 locked_verify(); |
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196 } |
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197 } |
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198 void verify_free_chunks_total(); |
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199 |
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200 void locked_print_free_chunks(outputStream* st); |
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201 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 202 |
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203 void print_on(outputStream* st) const; |
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204 }; |
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205 |
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206 // Used to manage the free list of Metablocks (a block corresponds |
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207 // to the allocation of a quantum of metadata). |
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208 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 209 BlockTreeDictionary* _dictionary; |
210 | |
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211 // Only allocate and split from freelist if the size of the allocation |
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212 // is at least 1/4th the size of the available block. |
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213 const static int WasteMultiplier = 4; |
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214 |
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215 // Accessors |
6885 | 216 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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217 |
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218 public: |
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219 BlockFreelist(); |
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220 ~BlockFreelist(); |
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221 |
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222 // Get and return a block to the free list |
6885 | 223 MetaWord* get_block(size_t word_size); |
224 void return_block(MetaWord* p, size_t word_size); | |
225 | |
226 size_t total_size() { | |
227 if (dictionary() == NULL) { | |
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228 return 0; |
6885 | 229 } else { |
230 return dictionary()->total_size(); | |
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231 } |
6885 | 232 } |
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233 |
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234 void print_on(outputStream* st) const; |
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235 }; |
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236 |
12902 | 237 // A VirtualSpaceList node. |
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238 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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239 friend class VirtualSpaceList; |
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240 |
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241 // Link to next VirtualSpaceNode |
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242 VirtualSpaceNode* _next; |
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243 |
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244 // total in the VirtualSpace |
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245 MemRegion _reserved; |
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246 ReservedSpace _rs; |
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247 VirtualSpace _virtual_space; |
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248 MetaWord* _top; |
10175 | 249 // count of chunks contained in this VirtualSpace |
250 uintx _container_count; | |
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251 |
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252 // Convenience functions to access the _virtual_space |
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253 char* low() const { return virtual_space()->low(); } |
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254 char* high() const { return virtual_space()->high(); } |
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255 |
10175 | 256 // The first Metachunk will be allocated at the bottom of the |
257 // VirtualSpace | |
258 Metachunk* first_chunk() { return (Metachunk*) bottom(); } | |
259 | |
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260 // Committed but unused space in the virtual space |
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261 size_t free_words_in_vs() const; |
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262 public: |
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263 |
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264 VirtualSpaceNode(size_t byte_size); |
10175 | 265 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
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266 ~VirtualSpaceNode(); |
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267 |
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268 // Convenience functions for logical bottom and end |
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269 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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270 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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271 |
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272 size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
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273 size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
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274 |
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275 bool is_pre_committed() const { return _virtual_space.special(); } |
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276 |
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277 // address of next available space in _virtual_space; |
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278 // Accessors |
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279 VirtualSpaceNode* next() { return _next; } |
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280 void set_next(VirtualSpaceNode* v) { _next = v; } |
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281 |
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282 void set_reserved(MemRegion const v) { _reserved = v; } |
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283 void set_top(MetaWord* v) { _top = v; } |
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284 |
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285 // Accessors |
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286 MemRegion* reserved() { return &_reserved; } |
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287 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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288 |
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289 // Returns true if "word_size" is available in the VirtualSpace |
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290 bool is_available(size_t word_size) { return word_size <= pointer_delta(end(), _top, sizeof(MetaWord)); } |
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291 |
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292 MetaWord* top() const { return _top; } |
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293 void inc_top(size_t word_size) { _top += word_size; } |
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294 |
10175 | 295 uintx container_count() { return _container_count; } |
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296 void inc_container_count(); |
10175 | 297 void dec_container_count(); |
298 #ifdef ASSERT | |
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299 uint container_count_slow(); |
10175 | 300 void verify_container_count(); |
301 #endif | |
302 | |
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303 // used and capacity in this single entry in the list |
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304 size_t used_words_in_vs() const; |
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305 size_t capacity_words_in_vs() const; |
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306 |
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307 bool initialize(); |
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308 |
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309 // get space from the virtual space |
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310 Metachunk* take_from_committed(size_t chunk_word_size); |
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311 |
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312 // Allocate a chunk from the virtual space and return it. |
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313 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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314 |
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315 // Expands/shrinks the committed space in a virtual space. Delegates |
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316 // to Virtualspace |
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317 bool expand_by(size_t min_words, size_t preferred_words); |
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318 |
10175 | 319 // In preparation for deleting this node, remove all the chunks |
320 // in the node from any freelist. | |
321 void purge(ChunkManager* chunk_manager); | |
322 | |
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323 // If an allocation doesn't fit in the current node a new node is created. |
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324 // Allocate chunks out of the remaining committed space in this node |
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325 // to avoid wasting that memory. |
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326 // This always adds up because all the chunk sizes are multiples of |
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327 // the smallest chunk size. |
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328 void retire(ChunkManager* chunk_manager); |
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329 |
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330 #ifdef ASSERT |
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331 // Debug support |
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332 void mangle(); |
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333 #endif |
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334 |
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335 void print_on(outputStream* st) const; |
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336 }; |
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337 |
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338 #define assert_is_ptr_aligned(ptr, alignment) \ |
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339 assert(is_ptr_aligned(ptr, alignment), \ |
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340 err_msg(PTR_FORMAT " is not aligned to " \ |
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341 SIZE_FORMAT, ptr, alignment)) |
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342 |
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343 #define assert_is_size_aligned(size, alignment) \ |
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344 assert(is_size_aligned(size, alignment), \ |
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345 err_msg(SIZE_FORMAT " is not aligned to " \ |
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346 SIZE_FORMAT, size, alignment)) |
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347 |
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348 |
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349 // Decide if large pages should be committed when the memory is reserved. |
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350 static bool should_commit_large_pages_when_reserving(size_t bytes) { |
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351 if (UseLargePages && UseLargePagesInMetaspace && !os::can_commit_large_page_memory()) { |
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352 size_t words = bytes / BytesPerWord; |
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353 bool is_class = false; // We never reserve large pages for the class space. |
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354 if (MetaspaceGC::can_expand(words, is_class) && |
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355 MetaspaceGC::allowed_expansion() >= words) { |
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356 return true; |
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357 } |
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358 } |
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359 |
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360 return false; |
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361 } |
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362 |
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363 // byte_size is the size of the associated virtualspace. |
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364 VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
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365 assert_is_size_aligned(bytes, Metaspace::reserve_alignment()); |
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366 |
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367 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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368 // configurable address, generally at the top of the Java heap so other |
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369 // memory addresses don't conflict. |
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370 if (DumpSharedSpaces) { |
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371 bool large_pages = false; // No large pages when dumping the CDS archive. |
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372 char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment()); |
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373 |
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374 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base, 0); |
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375 if (_rs.is_reserved()) { |
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376 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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377 } else { |
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378 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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379 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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380 } |
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381 MetaspaceShared::set_shared_rs(&_rs); |
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382 } else { |
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383 bool large_pages = should_commit_large_pages_when_reserving(bytes); |
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384 |
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385 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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386 } |
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387 |
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388 if (_rs.is_reserved()) { |
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389 assert(_rs.base() != NULL, "Catch if we get a NULL address"); |
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390 assert(_rs.size() != 0, "Catch if we get a 0 size"); |
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391 assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment()); |
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392 assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment()); |
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393 |
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394 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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395 } |
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396 } |
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397 |
10175 | 398 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
399 Metachunk* chunk = first_chunk(); | |
400 Metachunk* invalid_chunk = (Metachunk*) top(); | |
401 while (chunk < invalid_chunk ) { | |
12902 | 402 assert(chunk->is_tagged_free(), "Should be tagged free"); |
403 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
404 chunk_manager->remove_chunk(chunk); | |
405 assert(chunk->next() == NULL && | |
406 chunk->prev() == NULL, | |
407 "Was not removed from its list"); | |
408 chunk = (Metachunk*) next; | |
10175 | 409 } |
410 } | |
411 | |
412 #ifdef ASSERT | |
413 uint VirtualSpaceNode::container_count_slow() { | |
414 uint count = 0; | |
415 Metachunk* chunk = first_chunk(); | |
416 Metachunk* invalid_chunk = (Metachunk*) top(); | |
417 while (chunk < invalid_chunk ) { | |
418 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
419 // Don't count the chunks on the free lists. Those are | |
420 // still part of the VirtualSpaceNode but not currently | |
421 // counted. | |
12902 | 422 if (!chunk->is_tagged_free()) { |
10175 | 423 count++; |
424 } | |
425 chunk = (Metachunk*) next; | |
426 } | |
427 return count; | |
428 } | |
429 #endif | |
430 | |
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431 // List of VirtualSpaces for metadata allocation. |
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432 class VirtualSpaceList : public CHeapObj<mtClass> { |
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433 friend class VirtualSpaceNode; |
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434 |
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435 enum VirtualSpaceSizes { |
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436 VirtualSpaceSize = 256 * K |
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437 }; |
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438 |
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439 // Head of the list |
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440 VirtualSpaceNode* _virtual_space_list; |
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441 // virtual space currently being used for allocations |
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442 VirtualSpaceNode* _current_virtual_space; |
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443 |
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444 // Is this VirtualSpaceList used for the compressed class space |
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445 bool _is_class; |
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446 |
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447 // Sum of reserved and committed memory in the virtual spaces |
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448 size_t _reserved_words; |
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449 size_t _committed_words; |
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450 |
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451 // Number of virtual spaces |
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452 size_t _virtual_space_count; |
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453 |
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454 ~VirtualSpaceList(); |
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455 |
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456 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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457 |
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458 void set_virtual_space_list(VirtualSpaceNode* v) { |
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459 _virtual_space_list = v; |
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460 } |
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461 void set_current_virtual_space(VirtualSpaceNode* v) { |
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462 _current_virtual_space = v; |
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463 } |
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464 |
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465 void link_vs(VirtualSpaceNode* new_entry); |
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466 |
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467 // Get another virtual space and add it to the list. This |
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468 // is typically prompted by a failed attempt to allocate a chunk |
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469 // and is typically followed by the allocation of a chunk. |
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470 bool create_new_virtual_space(size_t vs_word_size); |
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471 |
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472 // Chunk up the unused committed space in the current |
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473 // virtual space and add the chunks to the free list. |
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474 void retire_current_virtual_space(); |
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475 |
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476 public: |
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477 VirtualSpaceList(size_t word_size); |
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478 VirtualSpaceList(ReservedSpace rs); |
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479 |
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480 size_t free_bytes(); |
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481 |
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482 Metachunk* get_new_chunk(size_t word_size, |
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483 size_t grow_chunks_by_words, |
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484 size_t medium_chunk_bunch); |
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485 |
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486 bool expand_node_by(VirtualSpaceNode* node, |
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487 size_t min_words, |
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488 size_t preferred_words); |
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489 |
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490 bool expand_by(size_t min_words, |
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491 size_t preferred_words); |
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492 |
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493 VirtualSpaceNode* current_virtual_space() { |
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494 return _current_virtual_space; |
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495 } |
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496 |
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497 bool is_class() const { return _is_class; } |
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498 |
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499 bool initialization_succeeded() { return _virtual_space_list != NULL; } |
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500 |
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501 size_t reserved_words() { return _reserved_words; } |
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502 size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
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503 size_t committed_words() { return _committed_words; } |
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504 size_t committed_bytes() { return committed_words() * BytesPerWord; } |
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505 |
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506 void inc_reserved_words(size_t v); |
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507 void dec_reserved_words(size_t v); |
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508 void inc_committed_words(size_t v); |
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509 void dec_committed_words(size_t v); |
10175 | 510 void inc_virtual_space_count(); |
511 void dec_virtual_space_count(); | |
512 | |
513 // Unlink empty VirtualSpaceNodes and free it. | |
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514 void purge(ChunkManager* chunk_manager); |
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515 |
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516 void print_on(outputStream* st) const; |
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517 |
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518 class VirtualSpaceListIterator : public StackObj { |
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519 VirtualSpaceNode* _virtual_spaces; |
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520 public: |
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521 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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522 _virtual_spaces(virtual_spaces) {} |
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523 |
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524 bool repeat() { |
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525 return _virtual_spaces != NULL; |
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526 } |
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527 |
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528 VirtualSpaceNode* get_next() { |
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529 VirtualSpaceNode* result = _virtual_spaces; |
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530 if (_virtual_spaces != NULL) { |
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531 _virtual_spaces = _virtual_spaces->next(); |
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532 } |
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533 return result; |
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534 } |
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535 }; |
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536 }; |
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537 |
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538 class Metadebug : AllStatic { |
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539 // Debugging support for Metaspaces |
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540 static int _allocation_fail_alot_count; |
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541 |
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542 public: |
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543 |
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544 static void init_allocation_fail_alot_count(); |
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545 #ifdef ASSERT |
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546 static bool test_metadata_failure(); |
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547 #endif |
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548 }; |
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549 |
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550 int Metadebug::_allocation_fail_alot_count = 0; |
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551 |
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552 // SpaceManager - used by Metaspace to handle allocations |
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553 class SpaceManager : public CHeapObj<mtClass> { |
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554 friend class Metaspace; |
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555 friend class Metadebug; |
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556 |
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557 private: |
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558 |
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559 // protects allocations |
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560 Mutex* const _lock; |
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561 |
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562 // Type of metadata allocated. |
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563 Metaspace::MetadataType _mdtype; |
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564 |
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565 // List of chunks in use by this SpaceManager. Allocations |
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566 // are done from the current chunk. The list is used for deallocating |
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567 // chunks when the SpaceManager is freed. |
6885 | 568 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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569 Metachunk* _current_chunk; |
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570 |
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571 // Number of small chunks to allocate to a manager |
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572 // If class space manager, small chunks are unlimited |
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573 static uint const _small_chunk_limit; |
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574 |
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575 // Sum of all space in allocated chunks |
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576 size_t _allocated_blocks_words; |
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577 |
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578 // Sum of all allocated chunks |
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579 size_t _allocated_chunks_words; |
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580 size_t _allocated_chunks_count; |
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581 |
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582 // Free lists of blocks are per SpaceManager since they |
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583 // are assumed to be in chunks in use by the SpaceManager |
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584 // and all chunks in use by a SpaceManager are freed when |
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585 // the class loader using the SpaceManager is collected. |
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586 BlockFreelist _block_freelists; |
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587 |
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588 // protects virtualspace and chunk expansions |
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589 static const char* _expand_lock_name; |
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590 static const int _expand_lock_rank; |
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591 static Mutex* const _expand_lock; |
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592 |
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593 private: |
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594 // Accessors |
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595 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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596 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { |
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597 // ensure lock-free iteration sees fully initialized node |
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598 OrderAccess::storestore(); |
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599 _chunks_in_use[index] = v; |
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600 } |
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601 |
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602 BlockFreelist* block_freelists() const { |
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603 return (BlockFreelist*) &_block_freelists; |
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604 } |
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605 |
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606 Metaspace::MetadataType mdtype() { return _mdtype; } |
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607 |
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608 VirtualSpaceList* vs_list() const { return Metaspace::get_space_list(_mdtype); } |
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609 ChunkManager* chunk_manager() const { return Metaspace::get_chunk_manager(_mdtype); } |
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610 |
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611 Metachunk* current_chunk() const { return _current_chunk; } |
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612 void set_current_chunk(Metachunk* v) { |
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613 _current_chunk = v; |
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614 } |
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615 |
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616 Metachunk* find_current_chunk(size_t word_size); |
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617 |
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618 // Add chunk to the list of chunks in use |
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619 void add_chunk(Metachunk* v, bool make_current); |
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620 void retire_current_chunk(); |
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621 |
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622 Mutex* lock() const { return _lock; } |
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623 |
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624 const char* chunk_size_name(ChunkIndex index) const; |
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625 |
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626 protected: |
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627 void initialize(); |
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628 |
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629 public: |
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630 SpaceManager(Metaspace::MetadataType mdtype, |
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631 Mutex* lock); |
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632 ~SpaceManager(); |
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633 |
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634 enum ChunkMultiples { |
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635 MediumChunkMultiple = 4 |
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636 }; |
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637 |
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638 bool is_class() { return _mdtype == Metaspace::ClassType; } |
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639 |
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640 // Accessors |
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641 size_t specialized_chunk_size() { return (size_t) is_class() ? ClassSpecializedChunk : SpecializedChunk; } |
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642 size_t small_chunk_size() { return (size_t) is_class() ? ClassSmallChunk : SmallChunk; } |
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643 size_t medium_chunk_size() { return (size_t) is_class() ? ClassMediumChunk : MediumChunk; } |
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644 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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645 |
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646 size_t smallest_chunk_size() { return specialized_chunk_size(); } |
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647 |
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648 size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
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649 size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
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650 size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
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651 size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
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652 |
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653 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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654 |
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655 static Mutex* expand_lock() { return _expand_lock; } |
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656 |
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657 // Increment the per Metaspace and global running sums for Metachunks |
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658 // by the given size. This is used when a Metachunk to added to |
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659 // the in-use list. |
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660 void inc_size_metrics(size_t words); |
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661 // Increment the per Metaspace and global running sums Metablocks by the given |
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662 // size. This is used when a Metablock is allocated. |
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663 void inc_used_metrics(size_t words); |
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664 // Delete the portion of the running sums for this SpaceManager. That is, |
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665 // the globals running sums for the Metachunks and Metablocks are |
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666 // decremented for all the Metachunks in-use by this SpaceManager. |
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667 void dec_total_from_size_metrics(); |
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668 |
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669 // Set the sizes for the initial chunks. |
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670 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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671 size_t* chunk_word_size, |
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672 size_t* class_chunk_word_size); |
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673 |
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674 size_t sum_capacity_in_chunks_in_use() const; |
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675 size_t sum_used_in_chunks_in_use() const; |
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676 size_t sum_free_in_chunks_in_use() const; |
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677 size_t sum_waste_in_chunks_in_use() const; |
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678 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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679 |
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680 size_t sum_count_in_chunks_in_use(); |
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681 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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682 |
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683 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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684 |
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685 // Block allocation and deallocation. |
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686 // Allocates a block from the current chunk |
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687 MetaWord* allocate(size_t word_size); |
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688 |
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689 // Helper for allocations |
6885 | 690 MetaWord* allocate_work(size_t word_size); |
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691 |
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692 // Returns a block to the per manager freelist |
6885 | 693 void deallocate(MetaWord* p, size_t word_size); |
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694 |
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695 // Based on the allocation size and a minimum chunk size, |
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696 // returned chunk size (for expanding space for chunk allocation). |
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697 size_t calc_chunk_size(size_t allocation_word_size); |
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698 |
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699 // Called when an allocation from the current chunk fails. |
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700 // Gets a new chunk (may require getting a new virtual space), |
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701 // and allocates from that chunk. |
6885 | 702 MetaWord* grow_and_allocate(size_t word_size); |
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703 |
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704 // Notify memory usage to MemoryService. |
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705 void track_metaspace_memory_usage(); |
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706 |
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707 // debugging support. |
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708 |
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709 void dump(outputStream* const out) const; |
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710 void print_on(outputStream* st) const; |
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711 void locked_print_chunks_in_use_on(outputStream* st) const; |
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712 |
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713 bool contains(const void *ptr); |
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714 |
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715 void verify(); |
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716 void verify_chunk_size(Metachunk* chunk); |
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717 NOT_PRODUCT(void mangle_freed_chunks();) |
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718 #ifdef ASSERT |
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719 void verify_allocated_blocks_words(); |
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720 #endif |
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721 |
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722 size_t get_raw_word_size(size_t word_size) { |
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723 size_t byte_size = word_size * BytesPerWord; |
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724 |
12902 | 725 size_t raw_bytes_size = MAX2(byte_size, sizeof(Metablock)); |
726 raw_bytes_size = align_size_up(raw_bytes_size, Metachunk::object_alignment()); | |
727 | |
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728 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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729 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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730 |
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731 return raw_word_size; |
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732 } |
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733 }; |
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734 |
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735 uint const SpaceManager::_small_chunk_limit = 4; |
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736 |
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737 const char* SpaceManager::_expand_lock_name = |
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738 "SpaceManager chunk allocation lock"; |
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739 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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740 Mutex* const SpaceManager::_expand_lock = |
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741 new Mutex(SpaceManager::_expand_lock_rank, |
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742 SpaceManager::_expand_lock_name, |
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743 Mutex::_allow_vm_block_flag); |
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744 |
10175 | 745 void VirtualSpaceNode::inc_container_count() { |
746 assert_lock_strong(SpaceManager::expand_lock()); | |
747 _container_count++; | |
748 assert(_container_count == container_count_slow(), | |
14358 | 749 err_msg("Inconsistency in container_count _container_count " SIZE_FORMAT |
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750 " container_count_slow() " SIZE_FORMAT, |
10175 | 751 _container_count, container_count_slow())); |
752 } | |
753 | |
754 void VirtualSpaceNode::dec_container_count() { | |
755 assert_lock_strong(SpaceManager::expand_lock()); | |
756 _container_count--; | |
757 } | |
758 | |
759 #ifdef ASSERT | |
760 void VirtualSpaceNode::verify_container_count() { | |
761 assert(_container_count == container_count_slow(), | |
14358 | 762 err_msg("Inconsistency in container_count _container_count " SIZE_FORMAT |
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763 " container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); |
10175 | 764 } |
765 #endif | |
766 | |
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767 // BlockFreelist methods |
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768 |
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769 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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770 |
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771 BlockFreelist::~BlockFreelist() { |
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772 if (_dictionary != NULL) { |
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773 if (Verbose && TraceMetadataChunkAllocation) { |
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774 _dictionary->print_free_lists(gclog_or_tty); |
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775 } |
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776 delete _dictionary; |
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777 } |
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778 } |
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779 |
6885 | 780 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
12902 | 781 Metablock* free_chunk = ::new (p) Metablock(word_size); |
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782 if (dictionary() == NULL) { |
6885 | 783 _dictionary = new BlockTreeDictionary(); |
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784 } |
6885 | 785 dictionary()->return_chunk(free_chunk); |
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786 } |
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787 |
6885 | 788 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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789 if (dictionary() == NULL) { |
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790 return NULL; |
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791 } |
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792 |
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793 if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
6885 | 794 // Dark matter. Too small for dictionary. |
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795 return NULL; |
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796 } |
6885 | 797 |
798 Metablock* free_block = | |
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799 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
6885 | 800 if (free_block == NULL) { |
801 return NULL; | |
802 } | |
803 | |
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804 const size_t block_size = free_block->size(); |
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805 if (block_size > WasteMultiplier * word_size) { |
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806 return_block((MetaWord*)free_block, block_size); |
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807 return NULL; |
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808 } |
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809 |
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810 MetaWord* new_block = (MetaWord*)free_block; |
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811 assert(block_size >= word_size, "Incorrect size of block from freelist"); |
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812 const size_t unused = block_size - word_size; |
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813 if (unused >= TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
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814 return_block(new_block + word_size, unused); |
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815 } |
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816 |
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817 return new_block; |
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818 } |
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819 |
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820 void BlockFreelist::print_on(outputStream* st) const { |
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821 if (dictionary() == NULL) { |
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822 return; |
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823 } |
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824 dictionary()->print_free_lists(st); |
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825 } |
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826 |
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827 // VirtualSpaceNode methods |
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828 |
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829 VirtualSpaceNode::~VirtualSpaceNode() { |
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830 _rs.release(); |
10175 | 831 #ifdef ASSERT |
832 size_t word_size = sizeof(*this) / BytesPerWord; | |
833 Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); | |
834 #endif | |
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835 } |
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836 |
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837 size_t VirtualSpaceNode::used_words_in_vs() const { |
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838 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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839 } |
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840 |
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841 // Space committed in the VirtualSpace |
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842 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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843 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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844 } |
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845 |
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846 size_t VirtualSpaceNode::free_words_in_vs() const { |
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847 return pointer_delta(end(), top(), sizeof(MetaWord)); |
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848 } |
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849 |
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850 // Allocates the chunk from the virtual space only. |
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851 // This interface is also used internally for debugging. Not all |
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852 // chunks removed here are necessarily used for allocation. |
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853 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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854 // Bottom of the new chunk |
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855 MetaWord* chunk_limit = top(); |
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856 assert(chunk_limit != NULL, "Not safe to call this method"); |
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857 |
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858 // The virtual spaces are always expanded by the |
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859 // commit granularity to enforce the following condition. |
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860 // Without this the is_available check will not work correctly. |
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861 assert(_virtual_space.committed_size() == _virtual_space.actual_committed_size(), |
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862 "The committed memory doesn't match the expanded memory."); |
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863 |
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864 if (!is_available(chunk_word_size)) { |
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865 if (TraceMetadataChunkAllocation) { |
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866 gclog_or_tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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867 // Dump some information about the virtual space that is nearly full |
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868 print_on(gclog_or_tty); |
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869 } |
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870 return NULL; |
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871 } |
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872 |
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873 // Take the space (bump top on the current virtual space). |
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874 inc_top(chunk_word_size); |
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875 |
10175 | 876 // Initialize the chunk |
877 Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); | |
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878 return result; |
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879 } |
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880 |
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881 |
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882 // Expand the virtual space (commit more of the reserved space) |
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883 bool VirtualSpaceNode::expand_by(size_t min_words, size_t preferred_words) { |
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884 size_t min_bytes = min_words * BytesPerWord; |
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885 size_t preferred_bytes = preferred_words * BytesPerWord; |
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886 |
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887 size_t uncommitted = virtual_space()->reserved_size() - virtual_space()->actual_committed_size(); |
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888 |
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889 if (uncommitted < min_bytes) { |
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890 return false; |
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891 } |
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892 |
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893 size_t commit = MIN2(preferred_bytes, uncommitted); |
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894 bool result = virtual_space()->expand_by(commit, false); |
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895 |
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896 assert(result, "Failed to commit memory"); |
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897 |
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898 return result; |
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899 } |
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900 |
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901 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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902 assert_lock_strong(SpaceManager::expand_lock()); |
10175 | 903 Metachunk* result = take_from_committed(chunk_word_size); |
904 if (result != NULL) { | |
905 inc_container_count(); | |
906 } | |
907 return result; | |
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908 } |
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909 |
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910 bool VirtualSpaceNode::initialize() { |
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911 |
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912 if (!_rs.is_reserved()) { |
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913 return false; |
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914 } |
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915 |
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916 // These are necessary restriction to make sure that the virtual space always |
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917 // grows in steps of Metaspace::commit_alignment(). If both base and size are |
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918 // aligned only the middle alignment of the VirtualSpace is used. |
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919 assert_is_ptr_aligned(_rs.base(), Metaspace::commit_alignment()); |
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920 assert_is_size_aligned(_rs.size(), Metaspace::commit_alignment()); |
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921 |
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922 // ReservedSpaces marked as special will have the entire memory |
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923 // pre-committed. Setting a committed size will make sure that |
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924 // committed_size and actual_committed_size agrees. |
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925 size_t pre_committed_size = _rs.special() ? _rs.size() : 0; |
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926 |
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927 bool result = virtual_space()->initialize_with_granularity(_rs, pre_committed_size, |
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928 Metaspace::commit_alignment()); |
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929 if (result) { |
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930 assert(virtual_space()->committed_size() == virtual_space()->actual_committed_size(), |
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931 "Checking that the pre-committed memory was registered by the VirtualSpace"); |
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932 |
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933 set_top((MetaWord*)virtual_space()->low()); |
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934 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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935 (HeapWord*)(_rs.base() + _rs.size()))); |
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936 |
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937 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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938 err_msg("Reserved start was not set properly " PTR_FORMAT |
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939 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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940 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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941 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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942 " != " SIZE_FORMAT, reserved()->word_size(), |
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943 _rs.size() / BytesPerWord)); |
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944 } |
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945 |
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946 return result; |
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947 } |
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948 |
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949 void VirtualSpaceNode::print_on(outputStream* st) const { |
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950 size_t used = used_words_in_vs(); |
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951 size_t capacity = capacity_words_in_vs(); |
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952 VirtualSpace* vs = virtual_space(); |
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953 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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954 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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955 PTR_FORMAT ", " PTR_FORMAT ")", |
7446
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956 vs, capacity / K, |
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957 capacity == 0 ? 0 : used * 100 / capacity, |
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958 bottom(), top(), end(), |
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959 vs->high_boundary()); |
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960 } |
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961 |
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962 #ifdef ASSERT |
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963 void VirtualSpaceNode::mangle() { |
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964 size_t word_size = capacity_words_in_vs(); |
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965 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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966 } |
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967 #endif // ASSERT |
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968 |
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969 // VirtualSpaceList methods |
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970 // Space allocated from the VirtualSpace |
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971 |
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972 VirtualSpaceList::~VirtualSpaceList() { |
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973 VirtualSpaceListIterator iter(virtual_space_list()); |
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974 while (iter.repeat()) { |
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975 VirtualSpaceNode* vsl = iter.get_next(); |
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976 delete vsl; |
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977 } |
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978 } |
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979 |
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980 void VirtualSpaceList::inc_reserved_words(size_t v) { |
10175 | 981 assert_lock_strong(SpaceManager::expand_lock()); |
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982 _reserved_words = _reserved_words + v; |
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983 } |
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984 void VirtualSpaceList::dec_reserved_words(size_t v) { |
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985 assert_lock_strong(SpaceManager::expand_lock()); |
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986 _reserved_words = _reserved_words - v; |
10175 | 987 } |
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988 |
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989 #define assert_committed_below_limit() \ |
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990 assert(MetaspaceAux::committed_bytes() <= MaxMetaspaceSize, \ |
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991 err_msg("Too much committed memory. Committed: " SIZE_FORMAT \ |
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992 " limit (MaxMetaspaceSize): " SIZE_FORMAT, \ |
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993 MetaspaceAux::committed_bytes(), MaxMetaspaceSize)); |
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994 |
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995 void VirtualSpaceList::inc_committed_words(size_t v) { |
10175 | 996 assert_lock_strong(SpaceManager::expand_lock()); |
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997 _committed_words = _committed_words + v; |
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998 |
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999 assert_committed_below_limit(); |
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1000 } |
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1001 void VirtualSpaceList::dec_committed_words(size_t v) { |
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1002 assert_lock_strong(SpaceManager::expand_lock()); |
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1003 _committed_words = _committed_words - v; |
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1004 |
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1005 assert_committed_below_limit(); |
10175 | 1006 } |
1007 | |
1008 void VirtualSpaceList::inc_virtual_space_count() { | |
1009 assert_lock_strong(SpaceManager::expand_lock()); | |
1010 _virtual_space_count++; | |
1011 } | |
1012 void VirtualSpaceList::dec_virtual_space_count() { | |
1013 assert_lock_strong(SpaceManager::expand_lock()); | |
1014 _virtual_space_count--; | |
1015 } | |
1016 | |
1017 void ChunkManager::remove_chunk(Metachunk* chunk) { | |
1018 size_t word_size = chunk->word_size(); | |
1019 ChunkIndex index = list_index(word_size); | |
1020 if (index != HumongousIndex) { | |
1021 free_chunks(index)->remove_chunk(chunk); | |
1022 } else { | |
1023 humongous_dictionary()->remove_chunk(chunk); | |
1024 } | |
1025 | |
1026 // Chunk is being removed from the chunks free list. | |
12902 | 1027 dec_free_chunks_total(chunk->word_size()); |
10175 | 1028 } |
1029 | |
1030 // Walk the list of VirtualSpaceNodes and delete | |
1031 // nodes with a 0 container_count. Remove Metachunks in | |
1032 // the node from their respective freelists. | |
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1033 void VirtualSpaceList::purge(ChunkManager* chunk_manager) { |
10175 | 1034 assert_lock_strong(SpaceManager::expand_lock()); |
1035 // Don't use a VirtualSpaceListIterator because this | |
1036 // list is being changed and a straightforward use of an iterator is not safe. | |
1037 VirtualSpaceNode* purged_vsl = NULL; | |
1038 VirtualSpaceNode* prev_vsl = virtual_space_list(); | |
1039 VirtualSpaceNode* next_vsl = prev_vsl; | |
1040 while (next_vsl != NULL) { | |
1041 VirtualSpaceNode* vsl = next_vsl; | |
1042 next_vsl = vsl->next(); | |
1043 // Don't free the current virtual space since it will likely | |
1044 // be needed soon. | |
1045 if (vsl->container_count() == 0 && vsl != current_virtual_space()) { | |
1046 // Unlink it from the list | |
1047 if (prev_vsl == vsl) { | |
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1048 // This is the case of the current node being the first node. |
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1049 assert(vsl == virtual_space_list(), "Expected to be the first node"); |
10175 | 1050 set_virtual_space_list(vsl->next()); |
1051 } else { | |
1052 prev_vsl->set_next(vsl->next()); | |
1053 } | |
1054 | |
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1055 vsl->purge(chunk_manager); |
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1056 dec_reserved_words(vsl->reserved_words()); |
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1057 dec_committed_words(vsl->committed_words()); |
10175 | 1058 dec_virtual_space_count(); |
1059 purged_vsl = vsl; | |
1060 delete vsl; | |
1061 } else { | |
1062 prev_vsl = vsl; | |
1063 } | |
1064 } | |
1065 #ifdef ASSERT | |
1066 if (purged_vsl != NULL) { | |
1067 // List should be stable enough to use an iterator here. | |
1068 VirtualSpaceListIterator iter(virtual_space_list()); | |
1069 while (iter.repeat()) { | |
1070 VirtualSpaceNode* vsl = iter.get_next(); | |
1071 assert(vsl != purged_vsl, "Purge of vsl failed"); | |
1072 } | |
1073 } | |
1074 #endif | |
1075 } | |
1076 | |
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1077 void VirtualSpaceList::retire_current_virtual_space() { |
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1078 assert_lock_strong(SpaceManager::expand_lock()); |
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1079 |
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1080 VirtualSpaceNode* vsn = current_virtual_space(); |
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1081 |
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1082 ChunkManager* cm = is_class() ? Metaspace::chunk_manager_class() : |
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1083 Metaspace::chunk_manager_metadata(); |
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1084 |
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1085 vsn->retire(cm); |
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1086 } |
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1087 |
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1088 void VirtualSpaceNode::retire(ChunkManager* chunk_manager) { |
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1089 for (int i = (int)MediumIndex; i >= (int)ZeroIndex; --i) { |
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1090 ChunkIndex index = (ChunkIndex)i; |
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1091 size_t chunk_size = chunk_manager->free_chunks(index)->size(); |
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1092 |
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1093 while (free_words_in_vs() >= chunk_size) { |
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1094 DEBUG_ONLY(verify_container_count();) |
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1095 Metachunk* chunk = get_chunk_vs(chunk_size); |
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1096 assert(chunk != NULL, "allocation should have been successful"); |
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1097 |
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1098 chunk_manager->return_chunks(index, chunk); |
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1099 chunk_manager->inc_free_chunks_total(chunk_size); |
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1100 DEBUG_ONLY(verify_container_count();) |
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1101 } |
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1102 } |
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1103 assert(free_words_in_vs() == 0, "should be empty now"); |
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1104 } |
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1105 |
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1106 VirtualSpaceList::VirtualSpaceList(size_t word_size) : |
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1107 _is_class(false), |
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1108 _virtual_space_list(NULL), |
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1109 _current_virtual_space(NULL), |
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1110 _reserved_words(0), |
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1111 _committed_words(0), |
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1112 _virtual_space_count(0) { |
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1113 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1114 Mutex::_no_safepoint_check_flag); |
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1115 create_new_virtual_space(word_size); |
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1116 } |
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1117 |
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1118 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1119 _is_class(true), |
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1120 _virtual_space_list(NULL), |
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1121 _current_virtual_space(NULL), |
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1122 _reserved_words(0), |
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1123 _committed_words(0), |
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1124 _virtual_space_count(0) { |
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1125 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1126 Mutex::_no_safepoint_check_flag); |
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1127 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1128 bool succeeded = class_entry->initialize(); |
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1129 if (succeeded) { |
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1130 link_vs(class_entry); |
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1131 } |
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1132 } |
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1133 |
10183
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1134 size_t VirtualSpaceList::free_bytes() { |
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1135 return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
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1136 } |
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1137 |
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1138 // Allocate another meta virtual space and add it to the list. |
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1139 bool VirtualSpaceList::create_new_virtual_space(size_t vs_word_size) { |
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1140 assert_lock_strong(SpaceManager::expand_lock()); |
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1141 |
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1142 if (is_class()) { |
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1143 assert(false, "We currently don't support more than one VirtualSpace for" |
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1144 " the compressed class space. The initialization of the" |
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1145 " CCS uses another code path and should not hit this path."); |
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1146 return false; |
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1147 } |
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1148 |
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1149 if (vs_word_size == 0) { |
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1150 assert(false, "vs_word_size should always be at least _reserve_alignment large."); |
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1151 return false; |
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1152 } |
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1153 |
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1154 // Reserve the space |
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1155 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1156 assert_is_size_aligned(vs_byte_size, Metaspace::reserve_alignment()); |
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1157 |
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1158 // Allocate the meta virtual space and initialize it. |
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1159 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1160 if (!new_entry->initialize()) { |
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1161 delete new_entry; |
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1162 return false; |
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1163 } else { |
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1164 assert(new_entry->reserved_words() == vs_word_size, |
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1165 "Reserved memory size differs from requested memory size"); |
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1166 link_vs(new_entry); |
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1167 return true; |
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1168 } |
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1169 } |
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1170 |
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1171 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
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1172 if (virtual_space_list() == NULL) { |
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1173 set_virtual_space_list(new_entry); |
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1174 } else { |
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1175 current_virtual_space()->set_next(new_entry); |
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1176 } |
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1177 set_current_virtual_space(new_entry); |
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1178 inc_reserved_words(new_entry->reserved_words()); |
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1179 inc_committed_words(new_entry->committed_words()); |
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1180 inc_virtual_space_count(); |
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1181 #ifdef ASSERT |
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1182 new_entry->mangle(); |
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1183 #endif |
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1184 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1185 VirtualSpaceNode* vsl = current_virtual_space(); |
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1186 vsl->print_on(gclog_or_tty); |
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1187 } |
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1188 } |
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1189 |
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1190 bool VirtualSpaceList::expand_node_by(VirtualSpaceNode* node, |
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1191 size_t min_words, |
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1192 size_t preferred_words) { |
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1193 size_t before = node->committed_words(); |
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1194 |
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1195 bool result = node->expand_by(min_words, preferred_words); |
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1196 |
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1197 size_t after = node->committed_words(); |
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1198 |
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1199 // after and before can be the same if the memory was pre-committed. |
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1200 assert(after >= before, "Inconsistency"); |
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1201 inc_committed_words(after - before); |
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1202 |
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1203 return result; |
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1204 } |
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1205 |
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1206 bool VirtualSpaceList::expand_by(size_t min_words, size_t preferred_words) { |
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1207 assert_is_size_aligned(min_words, Metaspace::commit_alignment_words()); |
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1208 assert_is_size_aligned(preferred_words, Metaspace::commit_alignment_words()); |
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1209 assert(min_words <= preferred_words, "Invalid arguments"); |
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1210 |
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1211 if (!MetaspaceGC::can_expand(min_words, this->is_class())) { |
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1212 return false; |
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1213 } |
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1214 |
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1215 size_t allowed_expansion_words = MetaspaceGC::allowed_expansion(); |
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1216 if (allowed_expansion_words < min_words) { |
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1217 return false; |
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1218 } |
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1219 |
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1220 size_t max_expansion_words = MIN2(preferred_words, allowed_expansion_words); |
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1221 |
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1222 // Commit more memory from the the current virtual space. |
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1223 bool vs_expanded = expand_node_by(current_virtual_space(), |
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1224 min_words, |
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1225 max_expansion_words); |
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1226 if (vs_expanded) { |
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1227 return true; |
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1228 } |
12979
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1229 retire_current_virtual_space(); |
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1230 |
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1231 // Get another virtual space. |
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1232 size_t grow_vs_words = MAX2((size_t)VirtualSpaceSize, preferred_words); |
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1233 grow_vs_words = align_size_up(grow_vs_words, Metaspace::reserve_alignment_words()); |
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1234 |
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1235 if (create_new_virtual_space(grow_vs_words)) { |
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1236 if (current_virtual_space()->is_pre_committed()) { |
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1237 // The memory was pre-committed, so we are done here. |
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1238 assert(min_words <= current_virtual_space()->committed_words(), |
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1239 "The new VirtualSpace was pre-committed, so it" |
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1240 "should be large enough to fit the alloc request."); |
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1241 return true; |
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1242 } |
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1243 |
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1244 return expand_node_by(current_virtual_space(), |
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1245 min_words, |
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1246 max_expansion_words); |
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1247 } |
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1248 |
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1249 return false; |
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1250 } |
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1251 |
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1252 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1253 size_t grow_chunks_by_words, |
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1254 size_t medium_chunk_bunch) { |
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1255 |
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1256 // Allocate a chunk out of the current virtual space. |
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1257 Metachunk* next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1258 |
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1259 if (next != NULL) { |
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1260 return next; |
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1261 } |
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1262 |
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1263 // The expand amount is currently only determined by the requested sizes |
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1264 // and not how much committed memory is left in the current virtual space. |
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1265 |
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1266 size_t min_word_size = align_size_up(grow_chunks_by_words, Metaspace::commit_alignment_words()); |
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1267 size_t preferred_word_size = align_size_up(medium_chunk_bunch, Metaspace::commit_alignment_words()); |
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1268 if (min_word_size >= preferred_word_size) { |
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1269 // Can happen when humongous chunks are allocated. |
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1270 preferred_word_size = min_word_size; |
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1271 } |
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1272 |
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1273 bool expanded = expand_by(min_word_size, preferred_word_size); |
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1274 if (expanded) { |
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1275 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1276 assert(next != NULL, "The allocation was expected to succeed after the expansion"); |
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1277 } |
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1278 |
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1279 return next; |
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1280 } |
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1281 |
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1282 void VirtualSpaceList::print_on(outputStream* st) const { |
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1283 if (TraceMetadataChunkAllocation && Verbose) { |
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1284 VirtualSpaceListIterator iter(virtual_space_list()); |
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1285 while (iter.repeat()) { |
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1286 VirtualSpaceNode* node = iter.get_next(); |
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1287 node->print_on(st); |
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1288 } |
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1289 } |
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1290 } |
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1291 |
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1292 // MetaspaceGC methods |
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1293 |
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1294 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1295 // Within the VM operation after the GC the attempt to allocate the metadata |
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1296 // should succeed. If the GC did not free enough space for the metaspace |
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1297 // allocation, the HWM is increased so that another virtualspace will be |
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1298 // allocated for the metadata. With perm gen the increase in the perm |
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1299 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1300 // metaspace policy uses those as the small and large steps for the HWM. |
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1301 // |
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1302 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1303 // resize the capacity of the metaspaces. The current implementation |
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1304 // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
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1305 // to resize the Java heap by some GC's. New flags can be implemented |
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1306 // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
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1307 // free space is desirable in the metaspace capacity to decide how much |
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1308 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
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1309 // free space is desirable in the metaspace capacity before decreasing |
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1310 // the HWM. |
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1311 |
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1312 // Calculate the amount to increase the high water mark (HWM). |
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1313 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1314 // another expansion is not requested too soon. If that is not |
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1315 // enough to satisfy the allocation, increase by MaxMetaspaceExpansion. |
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1316 // If that is still not enough, expand by the size of the allocation |
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1317 // plus some. |
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1318 size_t MetaspaceGC::delta_capacity_until_GC(size_t bytes) { |
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1319 size_t min_delta = MinMetaspaceExpansion; |
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1320 size_t max_delta = MaxMetaspaceExpansion; |
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1321 size_t delta = align_size_up(bytes, Metaspace::commit_alignment()); |
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1322 |
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1323 if (delta <= min_delta) { |
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1324 delta = min_delta; |
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1325 } else if (delta <= max_delta) { |
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1326 // Don't want to hit the high water mark on the next |
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1327 // allocation so make the delta greater than just enough |
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1328 // for this allocation. |
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1329 delta = max_delta; |
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1330 } else { |
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1331 // This allocation is large but the next ones are probably not |
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1332 // so increase by the minimum. |
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1333 delta = delta + min_delta; |
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1334 } |
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1335 |
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1336 assert_is_size_aligned(delta, Metaspace::commit_alignment()); |
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1337 |
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1338 return delta; |
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1339 } |
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1340 |
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1341 size_t MetaspaceGC::capacity_until_GC() { |
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1342 size_t value = (size_t)OrderAccess::load_ptr_acquire(&_capacity_until_GC); |
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1343 assert(value >= MetaspaceSize, "Not initialied properly?"); |
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1344 return value; |
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1345 } |
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1346 |
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1347 size_t MetaspaceGC::inc_capacity_until_GC(size_t v) { |
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1348 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1349 |
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1350 return (size_t)Atomic::add_ptr(v, &_capacity_until_GC); |
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1351 } |
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1352 |
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1353 size_t MetaspaceGC::dec_capacity_until_GC(size_t v) { |
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1354 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1355 |
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1356 return (size_t)Atomic::add_ptr(-(intptr_t)v, &_capacity_until_GC); |
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1357 } |
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1358 |
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1359 bool MetaspaceGC::can_expand(size_t word_size, bool is_class) { |
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1360 // Check if the compressed class space is full. |
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1361 if (is_class && Metaspace::using_class_space()) { |
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1362 size_t class_committed = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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1363 if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) { |
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1364 return false; |
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1365 } |
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1366 } |
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1367 |
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1368 // Check if the user has imposed a limit on the metaspace memory. |
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1369 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1370 if (committed_bytes + word_size * BytesPerWord > MaxMetaspaceSize) { |
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1371 return false; |
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1372 } |
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1373 |
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1374 return true; |
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1375 } |
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1376 |
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1377 size_t MetaspaceGC::allowed_expansion() { |
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1378 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1379 |
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1380 size_t left_until_max = MaxMetaspaceSize - committed_bytes; |
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1381 |
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1382 // Always grant expansion if we are initiating the JVM, |
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1383 // or if the GC_locker is preventing GCs. |
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1384 if (!is_init_completed() || GC_locker::is_active_and_needs_gc()) { |
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1385 return left_until_max / BytesPerWord; |
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1386 } |
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1387 |
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1388 size_t capacity_until_gc = capacity_until_GC(); |
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1389 |
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1390 if (capacity_until_gc <= committed_bytes) { |
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1391 return 0; |
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1392 } |
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1393 |
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1394 size_t left_until_GC = capacity_until_gc - committed_bytes; |
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1395 size_t left_to_commit = MIN2(left_until_GC, left_until_max); |
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1396 |
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1397 return left_to_commit / BytesPerWord; |
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1398 } |
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1399 |
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1400 void MetaspaceGC::compute_new_size() { |
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1401 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1402 uint current_shrink_factor = _shrink_factor; |
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1403 _shrink_factor = 0; |
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1404 |
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1405 const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
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1406 const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
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1407 |
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1408 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1409 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1410 |
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1411 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1412 size_t minimum_desired_capacity = |
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1413 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1414 // Don't shrink less than the initial generation size |
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1415 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1416 MetaspaceSize); |
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1417 |
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1418 if (PrintGCDetails && Verbose) { |
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1419 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1420 gclog_or_tty->print_cr(" " |
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1421 " minimum_free_percentage: %6.2f" |
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1422 " maximum_used_percentage: %6.2f", |
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1423 minimum_free_percentage, |
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1424 maximum_used_percentage); |
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1425 gclog_or_tty->print_cr(" " |
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1426 " used_after_gc : %6.1fKB", |
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1427 used_after_gc / (double) K); |
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1428 } |
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1429 |
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1430 |
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1431 size_t shrink_bytes = 0; |
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1432 if (capacity_until_GC < minimum_desired_capacity) { |
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1433 // If we have less capacity below the metaspace HWM, then |
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1434 // increment the HWM. |
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1435 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1436 expand_bytes = align_size_up(expand_bytes, Metaspace::commit_alignment()); |
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1437 // Don't expand unless it's significant |
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1438 if (expand_bytes >= MinMetaspaceExpansion) { |
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1439 MetaspaceGC::inc_capacity_until_GC(expand_bytes); |
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1440 } |
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1441 if (PrintGCDetails && Verbose) { |
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1442 size_t new_capacity_until_GC = capacity_until_GC; |
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1443 gclog_or_tty->print_cr(" expanding:" |
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1444 " minimum_desired_capacity: %6.1fKB" |
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1445 " expand_bytes: %6.1fKB" |
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1446 " MinMetaspaceExpansion: %6.1fKB" |
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1447 " new metaspace HWM: %6.1fKB", |
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1448 minimum_desired_capacity / (double) K, |
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1449 expand_bytes / (double) K, |
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1450 MinMetaspaceExpansion / (double) K, |
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1451 new_capacity_until_GC / (double) K); |
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1452 } |
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1453 return; |
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1454 } |
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1455 |
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1456 // No expansion, now see if we want to shrink |
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1457 // We would never want to shrink more than this |
14255 | 1458 assert(capacity_until_GC >= minimum_desired_capacity, |
1459 err_msg(SIZE_FORMAT " >= " SIZE_FORMAT, | |
1460 capacity_until_GC, minimum_desired_capacity)); | |
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1461 size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
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1462 |
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1463 // Should shrinking be considered? |
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1464 if (MaxMetaspaceFreeRatio < 100) { |
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1465 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1466 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1467 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1468 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1469 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1470 MetaspaceSize); |
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1471 if (PrintGCDetails && Verbose) { |
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1472 gclog_or_tty->print_cr(" " |
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1473 " maximum_free_percentage: %6.2f" |
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1474 " minimum_used_percentage: %6.2f", |
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1475 maximum_free_percentage, |
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1476 minimum_used_percentage); |
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1477 gclog_or_tty->print_cr(" " |
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1478 " minimum_desired_capacity: %6.1fKB" |
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1479 " maximum_desired_capacity: %6.1fKB", |
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1480 minimum_desired_capacity / (double) K, |
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1481 maximum_desired_capacity / (double) K); |
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1482 } |
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1483 |
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1484 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1485 "sanity check"); |
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1486 |
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1487 if (capacity_until_GC > maximum_desired_capacity) { |
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1488 // Capacity too large, compute shrinking size |
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1489 shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
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1490 // We don't want shrink all the way back to initSize if people call |
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1491 // System.gc(), because some programs do that between "phases" and then |
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1492 // we'd just have to grow the heap up again for the next phase. So we |
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1493 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1494 // on the third call, and 100% by the fourth call. But if we recompute |
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1495 // size without shrinking, it goes back to 0%. |
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1496 shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
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1497 |
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1498 shrink_bytes = align_size_down(shrink_bytes, Metaspace::commit_alignment()); |
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1499 |
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1500 assert(shrink_bytes <= max_shrink_bytes, |
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1501 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1502 shrink_bytes, max_shrink_bytes)); |
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1503 if (current_shrink_factor == 0) { |
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1504 _shrink_factor = 10; |
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1505 } else { |
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1506 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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1507 } |
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1508 if (PrintGCDetails && Verbose) { |
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1509 gclog_or_tty->print_cr(" " |
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1510 " shrinking:" |
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1511 " initSize: %.1fK" |
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1512 " maximum_desired_capacity: %.1fK", |
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1513 MetaspaceSize / (double) K, |
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1514 maximum_desired_capacity / (double) K); |
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1515 gclog_or_tty->print_cr(" " |
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1516 " shrink_bytes: %.1fK" |
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1517 " current_shrink_factor: %d" |
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1518 " new shrink factor: %d" |
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1519 " MinMetaspaceExpansion: %.1fK", |
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1520 shrink_bytes / (double) K, |
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1521 current_shrink_factor, |
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1522 _shrink_factor, |
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1523 MinMetaspaceExpansion / (double) K); |
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1524 } |
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1525 } |
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1526 } |
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1527 |
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1528 // Don't shrink unless it's significant |
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1529 if (shrink_bytes >= MinMetaspaceExpansion && |
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1530 ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
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1531 MetaspaceGC::dec_capacity_until_GC(shrink_bytes); |
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1532 } |
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1533 } |
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1534 |
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1535 // Metadebug methods |
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1536 |
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1537 void Metadebug::init_allocation_fail_alot_count() { |
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1538 if (MetadataAllocationFailALot) { |
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1539 _allocation_fail_alot_count = |
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1540 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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1541 } |
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1542 } |
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1543 |
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1544 #ifdef ASSERT |
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1545 bool Metadebug::test_metadata_failure() { |
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|
1546 if (MetadataAllocationFailALot && |
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parents:
diff
changeset
|
1547 Threads::is_vm_complete()) { |
da91efe96a93
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|
1548 if (_allocation_fail_alot_count > 0) { |
da91efe96a93
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coleenp
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diff
changeset
|
1549 _allocation_fail_alot_count--; |
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coleenp
parents:
diff
changeset
|
1550 } else { |
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|
1551 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1552 gclog_or_tty->print_cr("Metadata allocation failing for " |
da91efe96a93
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diff
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|
1553 "MetadataAllocationFailALot"); |
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diff
changeset
|
1554 } |
da91efe96a93
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|
1555 init_allocation_fail_alot_count(); |
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diff
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|
1556 return true; |
da91efe96a93
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parents:
diff
changeset
|
1557 } |
da91efe96a93
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parents:
diff
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|
1558 } |
da91efe96a93
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coleenp
parents:
diff
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|
1559 return false; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1560 } |
da91efe96a93
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diff
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|
1561 #endif |
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|
1562 |
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|
1563 // ChunkManager methods |
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|
1564 |
12235 | 1565 size_t ChunkManager::free_chunks_total_words() { |
6725
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|
1566 return _free_chunks_total; |
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|
1567 } |
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|
1568 |
12235 | 1569 size_t ChunkManager::free_chunks_total_bytes() { |
1570 return free_chunks_total_words() * BytesPerWord; | |
6725
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|
1571 } |
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|
1572 |
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|
1573 size_t ChunkManager::free_chunks_count() { |
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|
1574 #ifdef ASSERT |
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|
1575 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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|
1576 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1577 Mutex::_no_safepoint_check_flag); |
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1578 // This lock is only needed in debug because the verification |
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|
1579 // of the _free_chunks_totals walks the list of free chunks |
6969
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|
1580 slow_locked_verify_free_chunks_count(); |
6725
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|
1581 } |
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|
1582 #endif |
6969
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1583 return _free_chunks_count; |
6725
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|
1584 } |
da91efe96a93
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|
1585 |
da91efe96a93
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|
1586 void ChunkManager::locked_verify_free_chunks_total() { |
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1587 assert_lock_strong(SpaceManager::expand_lock()); |
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1588 assert(sum_free_chunks() == _free_chunks_total, |
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1589 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
da91efe96a93
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|
1590 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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|
1591 sum_free_chunks())); |
da91efe96a93
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|
1592 } |
da91efe96a93
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|
1593 |
da91efe96a93
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|
1594 void ChunkManager::verify_free_chunks_total() { |
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|
1595 MutexLockerEx cl(SpaceManager::expand_lock(), |
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|
1596 Mutex::_no_safepoint_check_flag); |
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|
1597 locked_verify_free_chunks_total(); |
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|
1598 } |
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|
1599 |
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|
1600 void ChunkManager::locked_verify_free_chunks_count() { |
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|
1601 assert_lock_strong(SpaceManager::expand_lock()); |
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1602 assert(sum_free_chunks_count() == _free_chunks_count, |
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1603 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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|
1604 " same as sum " SIZE_FORMAT, _free_chunks_count, |
da91efe96a93
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|
1605 sum_free_chunks_count())); |
da91efe96a93
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|
1606 } |
da91efe96a93
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|
1607 |
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|
1608 void ChunkManager::verify_free_chunks_count() { |
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|
1609 #ifdef ASSERT |
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|
1610 MutexLockerEx cl(SpaceManager::expand_lock(), |
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|
1611 Mutex::_no_safepoint_check_flag); |
da91efe96a93
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|
1612 locked_verify_free_chunks_count(); |
da91efe96a93
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|
1613 #endif |
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|
1614 } |
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|
1615 |
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|
1616 void ChunkManager::verify() { |
6969
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|
1617 MutexLockerEx cl(SpaceManager::expand_lock(), |
6bc207d87e5d
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|
1618 Mutex::_no_safepoint_check_flag); |
6bc207d87e5d
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|
1619 locked_verify(); |
6725
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|
1620 } |
da91efe96a93
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|
1621 |
da91efe96a93
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|
1622 void ChunkManager::locked_verify() { |
6885 | 1623 locked_verify_free_chunks_count(); |
6725
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|
1624 locked_verify_free_chunks_total(); |
da91efe96a93
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diff
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|
1625 } |
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|
1626 |
da91efe96a93
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|
1627 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
da91efe96a93
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|
1628 assert_lock_strong(SpaceManager::expand_lock()); |
7446
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diff
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|
1629 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
6725
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|
1630 _free_chunks_total, _free_chunks_count); |
da91efe96a93
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|
1631 } |
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|
1632 |
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|
1633 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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|
1634 assert_lock_strong(SpaceManager::expand_lock()); |
7446
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|
1635 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
6725
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|
1636 sum_free_chunks(), sum_free_chunks_count()); |
da91efe96a93
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diff
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|
1637 } |
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|
1638 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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|
1639 return &_free_chunks[index]; |
da91efe96a93
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diff
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|
1640 } |
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|
1641 |
da91efe96a93
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|
1642 // These methods that sum the free chunk lists are used in printing |
da91efe96a93
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coleenp
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diff
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|
1643 // methods that are used in product builds. |
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|
1644 size_t ChunkManager::sum_free_chunks() { |
da91efe96a93
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|
1645 assert_lock_strong(SpaceManager::expand_lock()); |
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|
1646 size_t result = 0; |
7446
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diff
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|
1647 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
6725
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|
1648 ChunkList* list = free_chunks(i); |
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|
1649 |
da91efe96a93
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|
1650 if (list == NULL) { |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1651 continue; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1652 } |
da91efe96a93
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diff
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|
1653 |
10101
df254344edf1
8011173: NPG: Replace the ChunkList implementation with class FreeList<Metachunk>
jmasa
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8813
diff
changeset
|
1654 result = result + list->count() * list->size(); |
6725
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|
1655 } |
6885 | 1656 result = result + humongous_dictionary()->total_size(); |
6725
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|
1657 return result; |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1658 } |
da91efe96a93
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|
1659 |
da91efe96a93
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|
1660 size_t ChunkManager::sum_free_chunks_count() { |
da91efe96a93
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|
1661 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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|
1662 size_t count = 0; |
7446
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|
1663 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
6725
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|
1664 ChunkList* list = free_chunks(i); |
da91efe96a93
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changeset
|
1665 if (list == NULL) { |
da91efe96a93
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coleenp
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diff
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|
1666 continue; |
da91efe96a93
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diff
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|
1667 } |
10101
df254344edf1
8011173: NPG: Replace the ChunkList implementation with class FreeList<Metachunk>
jmasa
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8813
diff
changeset
|
1668 count = count + list->count(); |
6725
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|
1669 } |
6885 | 1670 count = count + humongous_dictionary()->total_free_blocks(); |
6725
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|
1671 return count; |
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|
1672 } |
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|
1673 |
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|
1674 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
7446
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|
1675 ChunkIndex index = list_index(word_size); |
e51c9860cf66
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|
1676 assert(index < HumongousIndex, "No humongous list"); |
e51c9860cf66
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|
1677 return free_chunks(index); |
6725
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|
1678 } |
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|
1679 |
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|
1680 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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|
1681 assert_lock_strong(SpaceManager::expand_lock()); |
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1682 |
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1683 slow_locked_verify(); |
6885 | 1684 |
1685 Metachunk* chunk = NULL; | |
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1686 if (list_index(word_size) != HumongousIndex) { |
6885 | 1687 ChunkList* free_list = find_free_chunks_list(word_size); |
1688 assert(free_list != NULL, "Sanity check"); | |
1689 | |
1690 chunk = free_list->head(); | |
1691 | |
1692 if (chunk == NULL) { | |
1693 return NULL; | |
1694 } | |
1695 | |
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1696 // Remove the chunk as the head of the list. |
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1697 free_list->remove_chunk(chunk); |
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1698 |
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1699 if (TraceMetadataChunkAllocation && Verbose) { |
12240
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1700 gclog_or_tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1701 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1702 free_list, chunk, chunk->word_size()); |
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1703 } |
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1704 } else { |
6885 | 1705 chunk = humongous_dictionary()->get_chunk( |
1706 word_size, | |
1707 FreeBlockDictionary<Metachunk>::atLeast); | |
1708 | |
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1709 if (chunk == NULL) { |
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1710 return NULL; |
6885 | 1711 } |
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1712 |
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1713 if (TraceMetadataHumongousAllocation) { |
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1714 size_t waste = chunk->word_size() - word_size; |
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1715 gclog_or_tty->print_cr("Free list allocate humongous chunk size " |
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1716 SIZE_FORMAT " for requested size " SIZE_FORMAT |
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1717 " waste " SIZE_FORMAT, |
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1718 chunk->word_size(), word_size, waste); |
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1719 } |
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1720 } |
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1721 |
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1722 // Chunk is being removed from the chunks free list. |
12902 | 1723 dec_free_chunks_total(chunk->word_size()); |
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1724 |
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1725 // Remove it from the links to this freelist |
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1726 chunk->set_next(NULL); |
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1727 chunk->set_prev(NULL); |
10175 | 1728 #ifdef ASSERT |
1729 // Chunk is no longer on any freelist. Setting to false make container_count_slow() | |
1730 // work. | |
12902 | 1731 chunk->set_is_tagged_free(false); |
10175 | 1732 #endif |
12303
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1733 chunk->container()->inc_container_count(); |
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1734 |
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1735 slow_locked_verify(); |
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1736 return chunk; |
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1737 } |
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1738 |
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1739 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1740 assert_lock_strong(SpaceManager::expand_lock()); |
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1741 slow_locked_verify(); |
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1742 |
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1743 // Take from the beginning of the list |
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1744 Metachunk* chunk = free_chunks_get(word_size); |
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1745 if (chunk == NULL) { |
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1746 return NULL; |
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1747 } |
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1748 |
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1749 assert((word_size <= chunk->word_size()) || |
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1750 list_index(chunk->word_size() == HumongousIndex), |
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1751 "Non-humongous variable sized chunk"); |
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1752 if (TraceMetadataChunkAllocation) { |
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1753 size_t list_count; |
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1754 if (list_index(word_size) < HumongousIndex) { |
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1755 ChunkList* list = find_free_chunks_list(word_size); |
10101
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1756 list_count = list->count(); |
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1757 } else { |
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1758 list_count = humongous_dictionary()->total_count(); |
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1759 } |
12240
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1760 gclog_or_tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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1761 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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1762 this, chunk, chunk->word_size(), list_count); |
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1763 locked_print_free_chunks(gclog_or_tty); |
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1764 } |
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1765 |
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1766 return chunk; |
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1767 } |
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1768 |
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1769 void ChunkManager::print_on(outputStream* out) const { |
6885 | 1770 if (PrintFLSStatistics != 0) { |
12303
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1771 const_cast<ChunkManager *>(this)->humongous_dictionary()->report_statistics(); |
6885 | 1772 } |
1773 } | |
1774 | |
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1775 // SpaceManager methods |
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1776 |
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1777 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1778 size_t* chunk_word_size, |
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1779 size_t* class_chunk_word_size) { |
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1780 switch (type) { |
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1781 case Metaspace::BootMetaspaceType: |
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1782 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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1783 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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1784 break; |
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1785 case Metaspace::ROMetaspaceType: |
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1786 *chunk_word_size = SharedReadOnlySize / wordSize; |
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1787 *class_chunk_word_size = ClassSpecializedChunk; |
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1788 break; |
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1789 case Metaspace::ReadWriteMetaspaceType: |
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1790 *chunk_word_size = SharedReadWriteSize / wordSize; |
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1791 *class_chunk_word_size = ClassSpecializedChunk; |
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1792 break; |
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1793 case Metaspace::AnonymousMetaspaceType: |
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1794 case Metaspace::ReflectionMetaspaceType: |
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1795 *chunk_word_size = SpecializedChunk; |
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1796 *class_chunk_word_size = ClassSpecializedChunk; |
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1797 break; |
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1798 default: |
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1799 *chunk_word_size = SmallChunk; |
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1800 *class_chunk_word_size = ClassSmallChunk; |
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1801 break; |
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1802 } |
8007
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1803 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
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1804 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
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1805 " class " SIZE_FORMAT, |
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1806 *chunk_word_size, *class_chunk_word_size)); |
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1807 } |
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1808 |
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1809 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1810 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1811 size_t free = 0; |
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1812 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1813 Metachunk* chunk = chunks_in_use(i); |
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1814 while (chunk != NULL) { |
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1815 free += chunk->free_word_size(); |
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1816 chunk = chunk->next(); |
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1817 } |
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1818 } |
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1819 return free; |
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1820 } |
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1821 |
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1822 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1823 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1824 size_t result = 0; |
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1825 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1826 result += sum_waste_in_chunks_in_use(i); |
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1827 } |
6885 | 1828 |
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1829 return result; |
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1830 } |
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1831 |
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1832 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1833 size_t result = 0; |
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1834 Metachunk* chunk = chunks_in_use(index); |
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1835 // Count the free space in all the chunk but not the |
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1836 // current chunk from which allocations are still being done. |
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1837 while (chunk != NULL) { |
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1838 if (chunk != current_chunk()) { |
6885 | 1839 result += chunk->free_word_size(); |
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1840 } |
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1841 chunk = chunk->next(); |
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1842 } |
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1843 return result; |
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1844 } |
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1845 |
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1846 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1847 // For CMS use "allocated_chunks_words()" which does not need the |
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1848 // Metaspace lock. For the other collectors sum over the |
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1849 // lists. Use both methods as a check that "allocated_chunks_words()" |
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1850 // is correct. That is, sum_capacity_in_chunks() is too expensive |
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1851 // to use in the product and allocated_chunks_words() should be used |
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1852 // but allow for checking that allocated_chunks_words() returns the same |
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1853 // value as sum_capacity_in_chunks_in_use() which is the definitive |
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1854 // answer. |
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1855 if (UseConcMarkSweepGC) { |
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1856 return allocated_chunks_words(); |
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1857 } else { |
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1858 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1859 size_t sum = 0; |
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1860 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1861 Metachunk* chunk = chunks_in_use(i); |
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1862 while (chunk != NULL) { |
12902 | 1863 sum += chunk->word_size(); |
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1864 chunk = chunk->next(); |
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1865 } |
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1866 } |
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1867 return sum; |
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1868 } |
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1869 } |
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1870 |
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1871 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1872 size_t count = 0; |
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1873 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1874 count = count + sum_count_in_chunks_in_use(i); |
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1875 } |
6885 | 1876 |
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1877 return count; |
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1878 } |
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1879 |
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1880 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1881 size_t count = 0; |
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1882 Metachunk* chunk = chunks_in_use(i); |
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1883 while (chunk != NULL) { |
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1884 count++; |
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1885 chunk = chunk->next(); |
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1886 } |
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1887 return count; |
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1888 } |
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1889 |
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1890 |
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1891 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1892 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1893 size_t used = 0; |
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1894 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1895 Metachunk* chunk = chunks_in_use(i); |
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1896 while (chunk != NULL) { |
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1897 used += chunk->used_word_size(); |
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1898 chunk = chunk->next(); |
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1899 } |
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1900 } |
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1901 return used; |
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1902 } |
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1903 |
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1904 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1905 |
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1906 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1907 Metachunk* chunk = chunks_in_use(i); |
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1908 st->print("SpaceManager: %s " PTR_FORMAT, |
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1909 chunk_size_name(i), chunk); |
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1910 if (chunk != NULL) { |
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1911 st->print_cr(" free " SIZE_FORMAT, |
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1912 chunk->free_word_size()); |
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1913 } else { |
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1914 st->print_cr(""); |
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1915 } |
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1916 } |
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1917 |
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1918 chunk_manager()->locked_print_free_chunks(st); |
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1919 chunk_manager()->locked_print_sum_free_chunks(st); |
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1920 } |
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1921 |
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1922 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1923 |
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1924 // Decide between a small chunk and a medium chunk. Up to |
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1925 // _small_chunk_limit small chunks can be allocated but |
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1926 // once a medium chunk has been allocated, no more small |
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1927 // chunks will be allocated. |
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1928 size_t chunk_word_size; |
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1929 if (chunks_in_use(MediumIndex) == NULL && |
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1930 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
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1931 chunk_word_size = (size_t) small_chunk_size(); |
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1932 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
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1933 chunk_word_size = medium_chunk_size(); |
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1934 } |
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1935 } else { |
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1936 chunk_word_size = medium_chunk_size(); |
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1937 } |
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1938 |
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1939 // Might still need a humongous chunk. Enforce |
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1940 // humongous allocations sizes to be aligned up to |
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1941 // the smallest chunk size. |
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1942 size_t if_humongous_sized_chunk = |
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1943 align_size_up(word_size + Metachunk::overhead(), |
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1944 smallest_chunk_size()); |
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1945 chunk_word_size = |
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1946 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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1947 |
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1948 assert(!SpaceManager::is_humongous(word_size) || |
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1949 chunk_word_size == if_humongous_sized_chunk, |
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1950 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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1951 " chunk_word_size " SIZE_FORMAT, |
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1952 word_size, chunk_word_size)); |
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1953 if (TraceMetadataHumongousAllocation && |
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1954 SpaceManager::is_humongous(word_size)) { |
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1955 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1956 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1957 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1958 chunk_word_size); |
6885 | 1959 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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1960 Metachunk::overhead()); |
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1961 } |
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1962 return chunk_word_size; |
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1963 } |
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1964 |
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1965 void SpaceManager::track_metaspace_memory_usage() { |
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1966 if (is_init_completed()) { |
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1967 if (is_class()) { |
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1968 MemoryService::track_compressed_class_memory_usage(); |
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1969 } |
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1970 MemoryService::track_metaspace_memory_usage(); |
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1971 } |
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1972 } |
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1973 |
6885 | 1974 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1975 assert(vs_list()->current_virtual_space() != NULL, |
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1976 "Should have been set"); |
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1977 assert(current_chunk() == NULL || |
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1978 current_chunk()->allocate(word_size) == NULL, |
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1979 "Don't need to expand"); |
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1980 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1981 |
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1982 if (TraceMetadataChunkAllocation && Verbose) { |
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1983 size_t words_left = 0; |
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1984 size_t words_used = 0; |
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1985 if (current_chunk() != NULL) { |
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1986 words_left = current_chunk()->free_word_size(); |
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1987 words_used = current_chunk()->used_word_size(); |
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1988 } |
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1989 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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1990 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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1991 " words left", |
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1992 word_size, words_used, words_left); |
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1993 } |
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1994 |
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1995 // Get another chunk out of the virtual space |
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1996 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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1997 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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1998 |
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1999 MetaWord* mem = NULL; |
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2000 |
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2001 // If a chunk was available, add it to the in-use chunk list |
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2002 // and do an allocation from it. |
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2003 if (next != NULL) { |
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2004 // Add to this manager's list of chunks in use. |
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2005 add_chunk(next, false); |
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2006 mem = next->allocate(word_size); |
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2007 } |
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2008 |
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2009 // Track metaspace memory usage statistic. |
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2010 track_metaspace_memory_usage(); |
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2011 |
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2012 return mem; |
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2013 } |
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2014 |
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2015 void SpaceManager::print_on(outputStream* st) const { |
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2016 |
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2017 for (ChunkIndex i = ZeroIndex; |
6885 | 2018 i < NumberOfInUseLists ; |
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2019 i = next_chunk_index(i) ) { |
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2020 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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2021 chunks_in_use(i), |
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2022 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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2023 } |
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2024 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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2025 " Humongous " SIZE_FORMAT, |
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2026 sum_waste_in_chunks_in_use(SmallIndex), |
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2027 sum_waste_in_chunks_in_use(MediumIndex), |
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2028 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 2029 // block free lists |
2030 if (block_freelists() != NULL) { | |
2031 st->print_cr("total in block free lists " SIZE_FORMAT, | |
2032 block_freelists()->total_size()); | |
2033 } | |
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2034 } |
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2035 |
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2036 SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
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2037 Mutex* lock) : |
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2038 _mdtype(mdtype), |
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2039 _allocated_blocks_words(0), |
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2040 _allocated_chunks_words(0), |
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2041 _allocated_chunks_count(0), |
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2042 _lock(lock) |
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2043 { |
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2044 initialize(); |
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2045 } |
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2046 |
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2047 void SpaceManager::inc_size_metrics(size_t words) { |
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2048 assert_lock_strong(SpaceManager::expand_lock()); |
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2049 // Total of allocated Metachunks and allocated Metachunks count |
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2050 // for each SpaceManager |
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2051 _allocated_chunks_words = _allocated_chunks_words + words; |
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2052 _allocated_chunks_count++; |
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2053 // Global total of capacity in allocated Metachunks |
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2054 MetaspaceAux::inc_capacity(mdtype(), words); |
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2055 // Global total of allocated Metablocks. |
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2056 // used_words_slow() includes the overhead in each |
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2057 // Metachunk so include it in the used when the |
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2058 // Metachunk is first added (so only added once per |
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2059 // Metachunk). |
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2060 MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
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2061 } |
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2062 |
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2063 void SpaceManager::inc_used_metrics(size_t words) { |
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2064 // Add to the per SpaceManager total |
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2065 Atomic::add_ptr(words, &_allocated_blocks_words); |
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2066 // Add to the global total |
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2067 MetaspaceAux::inc_used(mdtype(), words); |
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2068 } |
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2069 |
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2070 void SpaceManager::dec_total_from_size_metrics() { |
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2071 MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
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2072 MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
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2073 // Also deduct the overhead per Metachunk |
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2074 MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
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2075 } |
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2076 |
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2077 void SpaceManager::initialize() { |
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2078 Metadebug::init_allocation_fail_alot_count(); |
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2079 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2080 _chunks_in_use[i] = NULL; |
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2081 } |
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2082 _current_chunk = NULL; |
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2083 if (TraceMetadataChunkAllocation && Verbose) { |
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2084 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2085 } |
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2086 } |
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2087 |
10101
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2088 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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2089 if (chunks == NULL) { |
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2090 return; |
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|
2091 } |
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2092 ChunkList* list = free_chunks(index); |
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2093 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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2094 assert_lock_strong(SpaceManager::expand_lock()); |
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2095 Metachunk* cur = chunks; |
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2096 |
10175 | 2097 // This returns chunks one at a time. If a new |
10101
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2098 // class List can be created that is a base class |
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2099 // of FreeList then something like FreeList::prepend() |
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2100 // can be used in place of this loop |
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2101 while (cur != NULL) { |
10175 | 2102 assert(cur->container() != NULL, "Container should have been set"); |
2103 cur->container()->dec_container_count(); | |
10101
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2104 // Capture the next link before it is changed |
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2105 // by the call to return_chunk_at_head(); |
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2106 Metachunk* next = cur->next(); |
12902 | 2107 DEBUG_ONLY(cur->set_is_tagged_free(true);) |
10101
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2108 list->return_chunk_at_head(cur); |
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2109 cur = next; |
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|
2110 } |
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|
2111 } |
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2112 |
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2113 SpaceManager::~SpaceManager() { |
8784
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2114 // This call this->_lock which can't be done while holding expand_lock() |
10183
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2115 assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
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2116 err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
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2117 " allocated_chunks_words() " SIZE_FORMAT, |
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2118 sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
8784
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2119 |
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2120 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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2121 Mutex::_no_safepoint_check_flag); |
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2122 |
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2123 chunk_manager()->slow_locked_verify(); |
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2124 |
10183
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|
2125 dec_total_from_size_metrics(); |
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2126 |
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2127 if (TraceMetadataChunkAllocation && Verbose) { |
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2128 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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2129 locked_print_chunks_in_use_on(gclog_or_tty); |
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2130 } |
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2131 |
10175 | 2132 // Do not mangle freed Metachunks. The chunk size inside Metachunks |
2133 // is during the freeing of a VirtualSpaceNodes. | |
7185
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|
2134 |
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2135 // Have to update before the chunks_in_use lists are emptied |
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2136 // below. |
12303
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2137 chunk_manager()->inc_free_chunks_total(allocated_chunks_words(), |
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2138 sum_count_in_chunks_in_use()); |
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2139 |
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2140 // Add all the chunks in use by this space manager |
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|
2141 // to the global list of free chunks. |
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2142 |
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2143 // Follow each list of chunks-in-use and add them to the |
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2144 // free lists. Each list is NULL terminated. |
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2145 |
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2146 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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2147 if (TraceMetadataChunkAllocation && Verbose) { |
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2148 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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|
2149 sum_count_in_chunks_in_use(i), |
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2150 chunk_size_name(i)); |
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|
2151 } |
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|
2152 Metachunk* chunks = chunks_in_use(i); |
12303
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2153 chunk_manager()->return_chunks(i, chunks); |
7446
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2154 set_chunks_in_use(i, NULL); |
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2155 if (TraceMetadataChunkAllocation && Verbose) { |
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|
2156 gclog_or_tty->print_cr("updated freelist count %d %s", |
12303
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|
2157 chunk_manager()->free_chunks(i)->count(), |
7446
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|
2158 chunk_size_name(i)); |
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|
2159 } |
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|
2160 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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|
2161 } |
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|
2162 |
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|
2163 // The medium chunk case may be optimized by passing the head and |
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|
2164 // tail of the medium chunk list to add_at_head(). The tail is often |
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2165 // the current chunk but there are probably exceptions. |
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|
2166 |
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2167 // Humongous chunks |
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2168 if (TraceMetadataChunkAllocation && Verbose) { |
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|
2169 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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2170 sum_count_in_chunks_in_use(HumongousIndex), |
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2171 chunk_size_name(HumongousIndex)); |
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2172 gclog_or_tty->print("Humongous chunk dictionary: "); |
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2173 } |
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2174 // Humongous chunks are never the current chunk. |
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2175 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2176 |
6885 | 2177 while (humongous_chunks != NULL) { |
2178 #ifdef ASSERT | |
12902 | 2179 humongous_chunks->set_is_tagged_free(true); |
6885 | 2180 #endif |
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2181 if (TraceMetadataChunkAllocation && Verbose) { |
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2182 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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2183 humongous_chunks, |
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2184 humongous_chunks->word_size()); |
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2185 } |
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2186 assert(humongous_chunks->word_size() == (size_t) |
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|
2187 align_size_up(humongous_chunks->word_size(), |
12979
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8015255: NPG: Don't waste fragment at the end of a VirtualSpaceNode before retiring it.
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|
2188 smallest_chunk_size()), |
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2189 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
8007
d9058e388631
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|
2190 " granularity %d", |
12979
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|
2191 humongous_chunks->word_size(), smallest_chunk_size())); |
6885 | 2192 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
10175 | 2193 humongous_chunks->container()->dec_container_count(); |
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2194 chunk_manager()->humongous_dictionary()->return_chunk(humongous_chunks); |
6885 | 2195 humongous_chunks = next_humongous_chunks; |
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2196 } |
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2197 if (TraceMetadataChunkAllocation && Verbose) { |
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2198 gclog_or_tty->print_cr(""); |
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2199 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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2200 chunk_manager()->humongous_dictionary()->total_count(), |
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2201 chunk_size_name(HumongousIndex)); |
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2202 } |
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2203 chunk_manager()->slow_locked_verify(); |
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2204 } |
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2205 |
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2206 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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2207 switch (index) { |
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2208 case SpecializedIndex: |
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2209 return "Specialized"; |
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2210 case SmallIndex: |
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2211 return "Small"; |
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2212 case MediumIndex: |
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2213 return "Medium"; |
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2214 case HumongousIndex: |
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2215 return "Humongous"; |
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2216 default: |
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2217 return NULL; |
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2218 } |
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2219 } |
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2220 |
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2221 ChunkIndex ChunkManager::list_index(size_t size) { |
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2222 switch (size) { |
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2223 case SpecializedChunk: |
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2224 assert(SpecializedChunk == ClassSpecializedChunk, |
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2225 "Need branch for ClassSpecializedChunk"); |
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2226 return SpecializedIndex; |
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2227 case SmallChunk: |
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2228 case ClassSmallChunk: |
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2229 return SmallIndex; |
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2230 case MediumChunk: |
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2231 case ClassMediumChunk: |
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2232 return MediumIndex; |
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2233 default: |
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2234 assert(size > MediumChunk || size > ClassMediumChunk, |
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2235 "Not a humongous chunk"); |
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2236 return HumongousIndex; |
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2237 } |
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2238 } |
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2239 |
6885 | 2240 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2241 assert_lock_strong(_lock); |
11966 | 2242 size_t raw_word_size = get_raw_word_size(word_size); |
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2243 size_t min_size = TreeChunk<Metablock, FreeList<Metablock> >::min_size(); |
11966 | 2244 assert(raw_word_size >= min_size, |
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2245 err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
11966 | 2246 block_freelists()->return_block(p, raw_word_size); |
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2247 } |
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2248 |
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2249 // Adds a chunk to the list of chunks in use. |
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2250 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2251 |
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2252 assert(new_chunk != NULL, "Should not be NULL"); |
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2253 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2254 |
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2255 new_chunk->reset_empty(); |
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2256 |
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2257 // Find the correct list and and set the current |
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2258 // chunk for that list. |
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2259 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2260 |
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2261 if (index != HumongousIndex) { |
12231
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2262 retire_current_chunk(); |
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2263 set_current_chunk(new_chunk); |
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2264 new_chunk->set_next(chunks_in_use(index)); |
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2265 set_chunks_in_use(index, new_chunk); |
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2266 } else { |
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2267 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2268 // small, so small will be null. Link this first chunk as the current |
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2269 // chunk. |
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2270 if (make_current) { |
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2271 // Set as the current chunk but otherwise treat as a humongous chunk. |
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2272 set_current_chunk(new_chunk); |
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2273 } |
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2274 // Link at head. The _current_chunk only points to a humongous chunk for |
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2275 // the null class loader metaspace (class and data virtual space managers) |
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2276 // any humongous chunks so will not point to the tail |
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2277 // of the humongous chunks list. |
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2278 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2279 set_chunks_in_use(HumongousIndex, new_chunk); |
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2280 |
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|
2281 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
6725
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2282 } |
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|
2283 |
10183
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|
2284 // Add to the running sum of capacity |
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|
2285 inc_size_metrics(new_chunk->word_size()); |
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2286 |
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2287 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2288 if (TraceMetadataChunkAllocation && Verbose) { |
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2289 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2290 sum_count_in_chunks_in_use()); |
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2291 new_chunk->print_on(gclog_or_tty); |
12303
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|
2292 chunk_manager()->locked_print_free_chunks(gclog_or_tty); |
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2293 } |
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2294 } |
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2295 |
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2296 void SpaceManager::retire_current_chunk() { |
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2297 if (current_chunk() != NULL) { |
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2298 size_t remaining_words = current_chunk()->free_word_size(); |
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2299 if (remaining_words >= TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
12231
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2300 block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
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2301 inc_used_metrics(remaining_words); |
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2302 } |
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2303 } |
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2304 } |
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2305 |
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2306 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
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2307 size_t grow_chunks_by_words) { |
12303
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|
2308 // Get a chunk from the chunk freelist |
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2309 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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2310 |
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2311 if (next == NULL) { |
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2312 next = vs_list()->get_new_chunk(word_size, |
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2313 grow_chunks_by_words, |
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|
2314 medium_chunk_bunch()); |
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|
2315 } |
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2316 |
12239 | 2317 if (TraceMetadataHumongousAllocation && next != NULL && |
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2318 SpaceManager::is_humongous(next->word_size())) { |
12239 | 2319 gclog_or_tty->print_cr(" new humongous chunk word size " |
2320 PTR_FORMAT, next->word_size()); | |
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2321 } |
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2322 |
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2323 return next; |
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2324 } |
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2325 |
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2326 MetaWord* SpaceManager::allocate(size_t word_size) { |
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2327 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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2328 |
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|
2329 size_t raw_word_size = get_raw_word_size(word_size); |
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2330 BlockFreelist* fl = block_freelists(); |
6885 | 2331 MetaWord* p = NULL; |
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2332 // Allocation from the dictionary is expensive in the sense that |
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2333 // the dictionary has to be searched for a size. Don't allocate |
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2334 // from the dictionary until it starts to get fat. Is this |
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2335 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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|
2336 // for allocations. Do some profiling. JJJ |
6885 | 2337 if (fl->total_size() > allocation_from_dictionary_limit) { |
2338 p = fl->get_block(raw_word_size); | |
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2339 } |
6885 | 2340 if (p == NULL) { |
2341 p = allocate_work(raw_word_size); | |
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|
2342 } |
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|
2343 |
6885 | 2344 return p; |
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|
2345 } |
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|
2346 |
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2347 // Returns the address of spaced allocated for "word_size". |
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2348 // This methods does not know about blocks (Metablocks) |
6885 | 2349 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
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|
2350 assert_lock_strong(_lock); |
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|
2351 #ifdef ASSERT |
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|
2352 if (Metadebug::test_metadata_failure()) { |
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|
2353 return NULL; |
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|
2354 } |
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|
2355 #endif |
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|
2356 // Is there space in the current chunk? |
6885 | 2357 MetaWord* result = NULL; |
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2358 |
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2359 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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|
2360 // never null because we gave it the size we wanted. Caller reports out |
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|
2361 // of memory if this returns null. |
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|
2362 if (DumpSharedSpaces) { |
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2363 assert(current_chunk() != NULL, "should never happen"); |
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2364 inc_used_metrics(word_size); |
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2365 return current_chunk()->allocate(word_size); // caller handles null result |
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|
2366 } |
12838
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|
2367 |
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2368 if (current_chunk() != NULL) { |
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|
2369 result = current_chunk()->allocate(word_size); |
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|
2370 } |
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|
2371 |
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|
2372 if (result == NULL) { |
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2373 result = grow_and_allocate(word_size); |
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|
2374 } |
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|
2375 |
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2376 if (result != NULL) { |
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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 |
14190
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|
2385 // This function looks at the chunks in the metaspace without locking. |
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2386 // The chunks are added with store ordering and not deleted except for at |
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2387 // unloading time. |
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2388 bool SpaceManager::contains(const void *ptr) { |
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2389 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) |
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|
2390 { |
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|
2391 Metachunk* curr = chunks_in_use(i); |
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2392 while (curr != NULL) { |
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2393 if (curr->contains(ptr)) return true; |
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2394 curr = curr->next(); |
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|
2395 } |
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|
2396 } |
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|
2397 return false; |
ce86c36b8921
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|
2398 } |
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|
2399 |
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|
2400 void SpaceManager::verify() { |
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|
2401 // If there are blocks in the dictionary, then |
14309 | 2402 // verification of chunks does not work since |
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2403 // being in the dictionary alters a chunk. |
6885 | 2404 if (block_freelists()->total_size() == 0) { |
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2405 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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|
2406 Metachunk* curr = chunks_in_use(i); |
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|
2407 while (curr != NULL) { |
da91efe96a93
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diff
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|
2408 curr->verify(); |
7208
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jmasa
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7187
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|
2409 verify_chunk_size(curr); |
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|
2410 curr = curr->next(); |
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|
2411 } |
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|
2412 } |
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|
2413 } |
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|
2414 } |
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|
2415 |
7208
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jmasa
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7187
diff
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|
2416 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
eade6b2e4782
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|
2417 assert(is_humongous(chunk->word_size()) || |
7446
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|
2418 chunk->word_size() == medium_chunk_size() || |
e51c9860cf66
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|
2419 chunk->word_size() == small_chunk_size() || |
e51c9860cf66
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7435
diff
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|
2420 chunk->word_size() == specialized_chunk_size(), |
7208
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jmasa
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7187
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|
2421 "Chunk size is wrong"); |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
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7187
diff
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|
2422 return; |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
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|
2423 } |
eade6b2e4782
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|
2424 |
6725
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|
2425 #ifdef ASSERT |
10183
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10175
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|
2426 void SpaceManager::verify_allocated_blocks_words() { |
6725
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diff
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|
2427 // Verification is only guaranteed at a safepoint. |
10183
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10175
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|
2428 assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
868d87ed63c8
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|
2429 "Verification can fail if the applications is running"); |
868d87ed63c8
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10175
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|
2430 assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
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|
2431 err_msg("allocation total is not consistent " SIZE_FORMAT |
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
parents:
7447
diff
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|
2432 " vs " SIZE_FORMAT, |
10183
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|
2433 allocated_blocks_words(), sum_used_in_chunks_in_use())); |
6725
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|
2434 } |
da91efe96a93
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|
2435 |
da91efe96a93
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coleenp
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diff
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|
2436 #endif |
da91efe96a93
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diff
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|
2437 |
da91efe96a93
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|
2438 void SpaceManager::dump(outputStream* const out) const { |
da91efe96a93
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diff
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|
2439 size_t curr_total = 0; |
da91efe96a93
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diff
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|
2440 size_t waste = 0; |
da91efe96a93
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|
2441 uint i = 0; |
da91efe96a93
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diff
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|
2442 size_t used = 0; |
da91efe96a93
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diff
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|
2443 size_t capacity = 0; |
da91efe96a93
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|
2444 |
da91efe96a93
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|
2445 // Add up statistics for all chunks in this SpaceManager. |
7446
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|
2446 for (ChunkIndex index = ZeroIndex; |
6885 | 2447 index < NumberOfInUseLists; |
6725
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|
2448 index = next_chunk_index(index)) { |
da91efe96a93
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diff
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|
2449 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
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|
2450 curr != NULL; |
da91efe96a93
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|
2451 curr = curr->next()) { |
da91efe96a93
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diff
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|
2452 out->print("%d) ", i++); |
da91efe96a93
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coleenp
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diff
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|
2453 curr->print_on(out); |
da91efe96a93
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|
2454 curr_total += curr->word_size(); |
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|
2455 used += curr->used_word_size(); |
12902 | 2456 capacity += curr->word_size(); |
6725
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|
2457 waste += curr->free_word_size() + curr->overhead();; |
da91efe96a93
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diff
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|
2458 } |
da91efe96a93
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|
2459 } |
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|
2460 |
12239 | 2461 if (TraceMetadataChunkAllocation && Verbose) { |
2462 block_freelists()->print_on(out); | |
2463 } | |
2464 | |
7446
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|
2465 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
6725
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diff
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|
2466 // Free space isn't wasted. |
da91efe96a93
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|
2467 waste -= free; |
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|
2468 |
da91efe96a93
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|
2469 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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diff
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|
2470 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
da91efe96a93
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|
2471 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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diff
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|
2472 } |
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diff
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|
2473 |
7185
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coleenp
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6969
diff
changeset
|
2474 #ifndef PRODUCT |
6725
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|
2475 void SpaceManager::mangle_freed_chunks() { |
7446
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changeset
|
2476 for (ChunkIndex index = ZeroIndex; |
6885 | 2477 index < NumberOfInUseLists; |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2478 index = next_chunk_index(index)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2479 for (Metachunk* curr = chunks_in_use(index); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2480 curr != NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2481 curr = curr->next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2482 curr->mangle(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2483 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2484 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2485 } |
7185
90273fc0a981
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
6969
diff
changeset
|
2486 #endif // PRODUCT |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2487 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2488 // MetaspaceAux |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2489 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2490 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
changeset
|
2491 size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
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|
2492 size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
10183
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10175
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|
2493 |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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parents:
12056
diff
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|
2494 size_t MetaspaceAux::free_bytes(Metaspace::MetadataType mdtype) { |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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parents:
12056
diff
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|
2495 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2496 return list == NULL ? 0 : list->free_bytes(); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2497 } |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
changeset
|
2498 |
10183
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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2499 size_t MetaspaceAux::free_bytes() { |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
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12056
diff
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|
2500 return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
10183
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parents:
10175
diff
changeset
|
2501 } |
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jmasa
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10175
diff
changeset
|
2502 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
changeset
|
2503 void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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jmasa
parents:
10175
diff
changeset
|
2504 assert_lock_strong(SpaceManager::expand_lock()); |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
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10191
diff
changeset
|
2505 assert(words <= allocated_capacity_words(mdtype), |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2506 err_msg("About to decrement below 0: words " SIZE_FORMAT |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2507 " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2508 words, mdtype, allocated_capacity_words(mdtype))); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2509 _allocated_capacity_words[mdtype] -= words; |
10183
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jmasa
parents:
10175
diff
changeset
|
2510 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2511 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
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10191
diff
changeset
|
2512 void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
868d87ed63c8
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jmasa
parents:
10175
diff
changeset
|
2513 assert_lock_strong(SpaceManager::expand_lock()); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2514 // Needs to be atomic |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2515 _allocated_capacity_words[mdtype] += words; |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2516 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2517 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2518 void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2519 assert(words <= allocated_used_words(mdtype), |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2520 err_msg("About to decrement below 0: words " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2521 " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2522 words, mdtype, allocated_used_words(mdtype))); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2523 // For CMS deallocation of the Metaspaces occurs during the |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2524 // sweep which is a concurrent phase. Protection by the expand_lock() |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2525 // is not enough since allocation is on a per Metaspace basis |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2526 // and protected by the Metaspace lock. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2527 jlong minus_words = (jlong) - (jlong) words; |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2528 Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2529 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2530 |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2531 void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2532 // _allocated_used_words tracks allocations for |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2533 // each piece of metadata. Those allocations are |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2534 // generally done concurrently by different application |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2535 // threads so must be done atomically. |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2536 Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2537 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2538 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2539 size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2540 size_t used = 0; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2541 ClassLoaderDataGraphMetaspaceIterator iter; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2542 while (iter.repeat()) { |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2543 Metaspace* msp = iter.get_next(); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2544 // Sum allocated_blocks_words for each metaspace |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2545 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2546 used += msp->used_words_slow(mdtype); |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2547 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2548 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2549 return used * BytesPerWord; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2550 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2551 |
12235 | 2552 size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2553 size_t free = 0; |
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) { |
12235 | 2558 free += msp->free_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 free * 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 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2564 size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2565 if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2566 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2567 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2568 // 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
|
2569 // added to the capacity calculation as needed. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2570 size_t capacity = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2571 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2572 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2573 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2574 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2575 capacity += msp->capacity_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2576 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2577 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2578 return capacity * BytesPerWord; |
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 |
12235 | 2581 size_t MetaspaceAux::capacity_bytes_slow() { |
2582 #ifdef PRODUCT | |
2583 // Use allocated_capacity_bytes() in PRODUCT instead of this function. | |
2584 guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); | |
2585 #endif | |
2586 size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); | |
2587 size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); | |
2588 assert(allocated_capacity_bytes() == class_capacity + non_class_capacity, | |
2589 err_msg("bad accounting: allocated_capacity_bytes() " SIZE_FORMAT | |
2590 " class_capacity + non_class_capacity " SIZE_FORMAT | |
2591 " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, | |
2592 allocated_capacity_bytes(), class_capacity + non_class_capacity, | |
2593 class_capacity, non_class_capacity)); | |
2594 | |
2595 return class_capacity + non_class_capacity; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2596 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2597 |
12235 | 2598 size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
2599 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); | |
12236
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2600 return list == NULL ? 0 : list->reserved_bytes(); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2601 } |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2602 |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2603 size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2604 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2605 return list == NULL ? 0 : list->committed_bytes(); |
12235 | 2606 } |
2607 | |
2608 size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } | |
2609 | |
2610 size_t MetaspaceAux::free_chunks_total_words(Metaspace::MetadataType mdtype) { | |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2611 ChunkManager* chunk_manager = Metaspace::get_chunk_manager(mdtype); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2612 if (chunk_manager == NULL) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2613 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2614 } |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2615 chunk_manager->slow_verify(); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2616 return chunk_manager->free_chunks_total_words(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2617 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2618 |
12235 | 2619 size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
2620 return free_chunks_total_words(mdtype) * BytesPerWord; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2621 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2622 |
12235 | 2623 size_t MetaspaceAux::free_chunks_total_words() { |
2624 return free_chunks_total_words(Metaspace::ClassType) + | |
2625 free_chunks_total_words(Metaspace::NonClassType); | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2626 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2627 |
12235 | 2628 size_t MetaspaceAux::free_chunks_total_bytes() { |
2629 return free_chunks_total_words() * BytesPerWord; | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2630 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2631 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2632 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
|
2633 gclog_or_tty->print(", [Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2634 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2635 gclog_or_tty->print(" " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2636 "->" SIZE_FORMAT |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2637 "(" SIZE_FORMAT ")", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2638 prev_metadata_used, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2639 allocated_used_bytes(), |
12235 | 2640 reserved_bytes()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2641 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2642 gclog_or_tty->print(" " SIZE_FORMAT "K" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2643 "->" SIZE_FORMAT "K" |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2644 "(" SIZE_FORMAT "K)", |
12235 | 2645 prev_metadata_used/K, |
2646 allocated_used_bytes()/K, | |
2647 reserved_bytes()/K); | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2648 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2649 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2650 gclog_or_tty->print("]"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2651 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2652 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2653 // This is printed when PrintGCDetails |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2654 void MetaspaceAux::print_on(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2655 Metaspace::MetadataType nct = Metaspace::NonClassType; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2656 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2657 out->print_cr(" Metaspace " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2658 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2659 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2660 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2661 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2662 allocated_used_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2663 allocated_capacity_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2664 committed_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2665 reserved_bytes()/K); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2666 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2667 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2668 Metaspace::MetadataType ct = Metaspace::ClassType; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2669 out->print_cr(" class space " |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2670 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2671 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2672 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2673 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2674 allocated_used_bytes(ct)/K, |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2675 allocated_capacity_bytes(ct)/K, |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2676 committed_bytes(ct)/K, |
12235 | 2677 reserved_bytes(ct)/K); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2678 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2679 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2680 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2681 // Print information for class space and data space separately. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2682 // This is almost the same as above. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2683 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
12235 | 2684 size_t free_chunks_capacity_bytes = free_chunks_total_bytes(mdtype); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2685 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
|
2686 size_t used_bytes = used_bytes_slow(mdtype); |
12235 | 2687 size_t free_bytes = free_bytes_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2688 size_t used_and_free = used_bytes + free_bytes + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2689 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2690 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
|
2691 "K + unused in chunks " SIZE_FORMAT "K + " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2692 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2693 "K capacity in allocated chunks " SIZE_FORMAT "K", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2694 used_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2695 free_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2696 free_chunks_capacity_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2697 used_and_free / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2698 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
|
2699 // 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
|
2700 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
|
2701 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2702 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2703 // Print total fragmentation for class metaspaces |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2704 void MetaspaceAux::print_class_waste(outputStream* out) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2705 assert(Metaspace::using_class_space(), "class metaspace not used"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2706 size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2707 size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_humongous_count = 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2708 ClassLoaderDataGraphMetaspaceIterator iter; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2709 while (iter.repeat()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2710 Metaspace* msp = iter.get_next(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2711 if (msp != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2712 cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2713 cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2714 cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2715 cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2716 cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2717 cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2718 cls_humongous_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2719 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2720 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2721 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2722 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2723 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2724 "large count " SIZE_FORMAT, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2725 cls_specialized_count, cls_specialized_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2726 cls_small_count, cls_small_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2727 cls_medium_count, cls_medium_waste, cls_humongous_count); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2728 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2729 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2730 // Print total fragmentation for data and class metaspaces separately |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2731 void MetaspaceAux::print_waste(outputStream* out) { |
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
|
2732 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
|
2733 size_t specialized_count = 0, small_count = 0, medium_count = 0, humongous_count = 0; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2734 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2735 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2736 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2737 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2738 if (msp != NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2739 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
|
2740 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
|
2741 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
|
2742 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
|
2743 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
|
2744 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
|
2745 humongous_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2746 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2747 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2748 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
|
2749 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
|
2750 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
|
2751 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
|
2752 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2753 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
|
2754 small_waste, medium_count, medium_waste, humongous_count); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2755 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2756 print_class_waste(out); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2757 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2758 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2759 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2760 // Dump global metaspace things from the end of ClassLoaderDataGraph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2761 void MetaspaceAux::dump(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2762 out->print_cr("All Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2763 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2764 out->print("class space: "); print_on(out, Metaspace::ClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2765 print_waste(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2766 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2767 |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2768 void MetaspaceAux::verify_free_chunks() { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2769 Metaspace::chunk_manager_metadata()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2770 if (Metaspace::using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2771 Metaspace::chunk_manager_class()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2772 } |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2773 } |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2774 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2775 void MetaspaceAux::verify_capacity() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2776 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2777 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
|
2778 // 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
|
2779 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
|
2780 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
|
2781 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
|
2782 " capacity_bytes_slow()" SIZE_FORMAT, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2783 running_sum_capacity_bytes, capacity_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2784 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2785 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2786 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2787 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
|
2788 assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2789 err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2790 " capacity_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2791 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
|
2792 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2793 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2794 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2795 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2796 void MetaspaceAux::verify_used() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2797 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2798 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
|
2799 // 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
|
2800 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
|
2801 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
|
2802 err_msg("allocated_used_bytes() " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2803 " used_bytes_slow()" SIZE_FORMAT, |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2804 allocated_used_bytes(), used_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2805 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2806 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2807 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2808 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
|
2809 assert(allocated_used_bytes(i) == used_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2810 err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2811 " used_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2812 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
|
2813 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2814 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2815 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2816 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2817 void MetaspaceAux::verify_metrics() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2818 verify_capacity(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2819 verify_used(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2820 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2821 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2822 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2823 // Metaspace methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2824 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2825 size_t Metaspace::_first_chunk_word_size = 0; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2826 size_t Metaspace::_first_class_chunk_word_size = 0; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2827 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2828 size_t Metaspace::_commit_alignment = 0; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2829 size_t Metaspace::_reserve_alignment = 0; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2830 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2831 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2832 initialize(lock, type); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2833 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2834 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2835 Metaspace::~Metaspace() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2836 delete _vsm; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2837 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2838 delete _class_vsm; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2839 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2840 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2841 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2842 VirtualSpaceList* Metaspace::_space_list = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2843 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2844 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2845 ChunkManager* Metaspace::_chunk_manager_metadata = NULL; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2846 ChunkManager* Metaspace::_chunk_manager_class = NULL; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2847 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2848 #define VIRTUALSPACEMULTIPLIER 2 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2849 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2850 #ifdef _LP64 |
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12998
diff
changeset
|
2851 static const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1); |
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12998
diff
changeset
|
2852 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2853 void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2854 // Figure out the narrow_klass_base and the narrow_klass_shift. The |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2855 // narrow_klass_base is the lower of the metaspace base and the cds base |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2856 // (if cds is enabled). The narrow_klass_shift depends on the distance |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2857 // between the lower base and higher address. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2858 address lower_base; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2859 address higher_address; |
740e263c80c6
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2860 if (UseSharedSpaces) { |
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2861 higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
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2862 (address)(metaspace_base + compressed_class_space_size())); |
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2863 lower_base = MIN2(metaspace_base, cds_base); |
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2864 } else { |
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2865 higher_address = metaspace_base + compressed_class_space_size(); |
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|
2866 lower_base = metaspace_base; |
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|
2867 |
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2868 uint64_t klass_encoding_max = UnscaledClassSpaceMax << LogKlassAlignmentInBytes; |
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2869 // If compressed class space fits in lower 32G, we don't need a base. |
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2870 if (higher_address <= (address)klass_encoding_max) { |
14309 | 2871 lower_base = 0; // Effectively lower base is zero. |
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|
2872 } |
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|
2873 } |
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|
2874 |
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|
2875 Universe::set_narrow_klass_base(lower_base); |
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|
2876 |
13037
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|
2877 if ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax) { |
12056
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2878 Universe::set_narrow_klass_shift(0); |
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|
2879 } else { |
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|
2880 assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
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|
2881 Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
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|
2882 } |
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|
2883 } |
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|
2884 |
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|
2885 // Return TRUE if the specified metaspace_base and cds_base are close enough |
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|
2886 // to work with compressed klass pointers. |
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|
2887 bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
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2888 assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
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2889 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
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2890 address lower_base = MIN2((address)metaspace_base, cds_base); |
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|
2891 address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
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|
2892 (address)(metaspace_base + compressed_class_space_size())); |
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|
2893 return ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax); |
12056
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|
2894 } |
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|
2895 |
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|
2896 // Try to allocate the metaspace at the requested addr. |
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|
2897 void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
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|
2898 assert(using_class_space(), "called improperly"); |
12226
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|
2899 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
13000
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|
2900 assert(compressed_class_space_size() < KlassEncodingMetaspaceMax, |
12056
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|
2901 "Metaspace size is too big"); |
13000
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|
2902 assert_is_ptr_aligned(requested_addr, _reserve_alignment); |
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|
2903 assert_is_ptr_aligned(cds_base, _reserve_alignment); |
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|
2904 assert_is_size_aligned(compressed_class_space_size(), _reserve_alignment); |
12838
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|
2905 |
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|
2906 // Don't use large pages for the class space. |
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|
2907 bool large_pages = false; |
12056
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|
2908 |
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|
2909 ReservedSpace metaspace_rs = ReservedSpace(compressed_class_space_size(), |
12838
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|
2910 _reserve_alignment, |
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|
2911 large_pages, |
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|
2912 requested_addr, 0); |
12056
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|
2913 if (!metaspace_rs.is_reserved()) { |
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diff
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|
2914 if (UseSharedSpaces) { |
12838
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|
2915 size_t increment = align_size_up(1*G, _reserve_alignment); |
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|
2916 |
12056
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|
2917 // Keep trying to allocate the metaspace, increasing the requested_addr |
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diff
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|
2918 // by 1GB each time, until we reach an address that will no longer allow |
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|
2919 // use of CDS with compressed klass pointers. |
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|
2920 char *addr = requested_addr; |
12838
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|
2921 while (!metaspace_rs.is_reserved() && (addr + increment > addr) && |
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|
2922 can_use_cds_with_metaspace_addr(addr + increment, cds_base)) { |
85c1ca43713f
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|
2923 addr = addr + increment; |
13000
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|
2924 metaspace_rs = ReservedSpace(compressed_class_space_size(), |
12838
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|
2925 _reserve_alignment, large_pages, addr, 0); |
12056
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11966
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|
2926 } |
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diff
changeset
|
2927 } |
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diff
changeset
|
2928 |
740e263c80c6
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diff
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|
2929 // If no successful allocation then try to allocate the space anywhere. If |
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diff
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|
2930 // that fails then OOM doom. At this point we cannot try allocating the |
12226
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|
2931 // metaspace as if UseCompressedClassPointers is off because too much |
7944aba7ba41
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|
2932 // initialization has happened that depends on UseCompressedClassPointers. |
7944aba7ba41
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diff
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|
2933 // So, UseCompressedClassPointers cannot be turned off at this point. |
12056
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|
2934 if (!metaspace_rs.is_reserved()) { |
13000
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|
2935 metaspace_rs = ReservedSpace(compressed_class_space_size(), |
12838
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|
2936 _reserve_alignment, large_pages); |
12056
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diff
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|
2937 if (!metaspace_rs.is_reserved()) { |
740e263c80c6
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diff
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|
2938 vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
13000
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|
2939 compressed_class_space_size())); |
12056
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11966
diff
changeset
|
2940 } |
740e263c80c6
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11966
diff
changeset
|
2941 } |
740e263c80c6
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diff
changeset
|
2942 } |
740e263c80c6
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diff
changeset
|
2943 |
740e263c80c6
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diff
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|
2944 // If we got here then the metaspace got allocated. |
740e263c80c6
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diff
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|
2945 MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
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|
2946 |
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diff
changeset
|
2947 // Verify that we can use shared spaces. Otherwise, turn off CDS. |
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|
2948 if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
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|
2949 FileMapInfo::stop_sharing_and_unmap( |
740e263c80c6
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diff
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|
2950 "Could not allocate metaspace at a compatible address"); |
740e263c80c6
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11966
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|
2951 } |
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diff
changeset
|
2952 |
740e263c80c6
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diff
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|
2953 set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
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|
2954 UseSharedSpaces ? (address)cds_base : 0); |
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|
2955 |
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diff
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|
2956 initialize_class_space(metaspace_rs); |
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|
2957 |
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|
2958 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
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|
2959 gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
740e263c80c6
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|
2960 Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
13000
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|
2961 gclog_or_tty->print_cr("Compressed class space size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
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|
2962 compressed_class_space_size(), metaspace_rs.base(), requested_addr); |
12056
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|
2963 } |
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|
2964 } |
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|
2965 |
12226
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|
2966 // For UseCompressedClassPointers the class space is reserved above the top of |
12056
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|
2967 // the Java heap. The argument passed in is at the base of the compressed space. |
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|
2968 void Metaspace::initialize_class_space(ReservedSpace rs) { |
740e263c80c6
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|
2969 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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|
2970 assert(rs.size() >= CompressedClassSpaceSize, |
7944aba7ba41
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|
2971 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
12056
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|
2972 assert(using_class_space(), "Must be using class space"); |
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|
2973 _class_space_list = new VirtualSpaceList(rs); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
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12302
diff
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|
2974 _chunk_manager_class = new ChunkManager(SpecializedChunk, ClassSmallChunk, ClassMediumChunk); |
12838
85c1ca43713f
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|
2975 |
85c1ca43713f
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|
2976 if (!_class_space_list->initialization_succeeded()) { |
85c1ca43713f
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|
2977 vm_exit_during_initialization("Failed to setup compressed class space virtual space list."); |
85c1ca43713f
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|
2978 } |
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2979 } |
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2980 |
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2981 #endif |
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2982 |
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2983 void Metaspace::ergo_initialize() { |
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2984 if (DumpSharedSpaces) { |
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2985 // Using large pages when dumping the shared archive is currently not implemented. |
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2986 FLAG_SET_ERGO(bool, UseLargePagesInMetaspace, false); |
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2987 } |
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|
2988 |
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2989 size_t page_size = os::vm_page_size(); |
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2990 if (UseLargePages && UseLargePagesInMetaspace) { |
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2991 page_size = os::large_page_size(); |
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2992 } |
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2993 |
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2994 _commit_alignment = page_size; |
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2995 _reserve_alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity()); |
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2996 |
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2997 // Do not use FLAG_SET_ERGO to update MaxMetaspaceSize, since this will |
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2998 // override if MaxMetaspaceSize was set on the command line or not. |
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2999 // This information is needed later to conform to the specification of the |
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3000 // java.lang.management.MemoryUsage API. |
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3001 // |
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3002 // Ideally, we would be able to set the default value of MaxMetaspaceSize in |
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3003 // globals.hpp to the aligned value, but this is not possible, since the |
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3004 // alignment depends on other flags being parsed. |
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3005 MaxMetaspaceSize = align_size_down_bounded(MaxMetaspaceSize, _reserve_alignment); |
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3006 |
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3007 if (MetaspaceSize > MaxMetaspaceSize) { |
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3008 MetaspaceSize = MaxMetaspaceSize; |
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3009 } |
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3010 |
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3011 MetaspaceSize = align_size_down_bounded(MetaspaceSize, _commit_alignment); |
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3012 |
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3013 assert(MetaspaceSize <= MaxMetaspaceSize, "MetaspaceSize should be limited by MaxMetaspaceSize"); |
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3014 |
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3015 if (MetaspaceSize < 256*K) { |
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3016 vm_exit_during_initialization("Too small initial Metaspace size"); |
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3017 } |
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3018 |
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3019 MinMetaspaceExpansion = align_size_down_bounded(MinMetaspaceExpansion, _commit_alignment); |
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3020 MaxMetaspaceExpansion = align_size_down_bounded(MaxMetaspaceExpansion, _commit_alignment); |
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3021 |
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3022 CompressedClassSpaceSize = align_size_down_bounded(CompressedClassSpaceSize, _reserve_alignment); |
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3023 set_compressed_class_space_size(CompressedClassSpaceSize); |
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3024 } |
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3025 |
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3026 void Metaspace::global_initialize() { |
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3027 // Initialize the alignment for shared spaces. |
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3028 int max_alignment = os::vm_page_size(); |
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3029 size_t cds_total = 0; |
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3030 |
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3031 MetaspaceShared::set_max_alignment(max_alignment); |
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3032 |
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3033 if (DumpSharedSpaces) { |
12838
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3034 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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3035 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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3036 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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3037 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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3038 |
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3039 // Initialize with the sum of the shared space sizes. The read-only |
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3040 // and read write metaspace chunks will be allocated out of this and the |
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3041 // remainder is the misc code and data chunks. |
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3042 cds_total = FileMapInfo::shared_spaces_size(); |
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3043 cds_total = align_size_up(cds_total, _reserve_alignment); |
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3044 _space_list = new VirtualSpaceList(cds_total/wordSize); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
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3045 _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
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3046 |
12838
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3047 if (!_space_list->initialization_succeeded()) { |
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3048 vm_exit_during_initialization("Unable to dump shared archive.", NULL); |
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3049 } |
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3050 |
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3051 #ifdef _LP64 |
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3052 if (cds_total + compressed_class_space_size() > UnscaledClassSpaceMax) { |
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3053 vm_exit_during_initialization("Unable to dump shared archive.", |
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3054 err_msg("Size of archive (" SIZE_FORMAT ") + compressed class space (" |
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3055 SIZE_FORMAT ") == total (" SIZE_FORMAT ") is larger than compressed " |
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3056 "klass limit: " SIZE_FORMAT, cds_total, compressed_class_space_size(), |
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3057 cds_total + compressed_class_space_size(), UnscaledClassSpaceMax)); |
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3058 } |
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|
3059 |
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3060 // Set the compressed klass pointer base so that decoding of these pointers works |
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|
3061 // properly when creating the shared archive. |
12226
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|
3062 assert(UseCompressedOops && UseCompressedClassPointers, |
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3063 "UseCompressedOops and UseCompressedClassPointers must be set"); |
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3064 Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
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3065 if (TraceMetavirtualspaceAllocation && Verbose) { |
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3066 gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
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3067 _space_list->current_virtual_space()->bottom()); |
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|
3068 } |
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|
3069 |
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|
3070 Universe::set_narrow_klass_shift(0); |
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|
3071 #endif |
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|
3072 |
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3073 } else { |
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3074 // If using shared space, open the file that contains the shared space |
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3075 // and map in the memory before initializing the rest of metaspace (so |
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3076 // the addresses don't conflict) |
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|
3077 address cds_address = NULL; |
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|
3078 if (UseSharedSpaces) { |
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|
3079 FileMapInfo* mapinfo = new FileMapInfo(); |
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|
3080 memset(mapinfo, 0, sizeof(FileMapInfo)); |
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|
3081 |
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|
3082 // Open the shared archive file, read and validate the header. If |
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|
3083 // initialization fails, shared spaces [UseSharedSpaces] are |
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|
3084 // disabled and the file is closed. |
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|
3085 // Map in spaces now also |
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|
3086 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
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|
3087 FileMapInfo::set_current_info(mapinfo); |
12838
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|
3088 cds_total = FileMapInfo::shared_spaces_size(); |
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|
3089 cds_address = (address)mapinfo->region_base(0); |
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|
3090 } else { |
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|
3091 assert(!mapinfo->is_open() && !UseSharedSpaces, |
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|
3092 "archive file not closed or shared spaces not disabled."); |
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|
3093 } |
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|
3094 } |
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|
3095 |
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|
3096 #ifdef _LP64 |
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|
3097 // If UseCompressedClassPointers is set then allocate the metaspace area |
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|
3098 // above the heap and above the CDS area (if it exists). |
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changeset
|
3099 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3100 if (UseSharedSpaces) { |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3101 char* cds_end = (char*)(cds_address + cds_total); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3102 cds_end = (char *)align_ptr_up(cds_end, _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3103 allocate_metaspace_compressed_klass_ptrs(cds_end, cds_address); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3104 } else { |
13000
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12998
diff
changeset
|
3105 char* base = (char*)align_ptr_up(Universe::heap()->reserved_region().end(), _reserve_alignment); |
209aa13ab8c0
8024927: Nashorn performance regression with CompressedOops
coleenp
parents:
12998
diff
changeset
|
3106 allocate_metaspace_compressed_klass_ptrs(base, 0); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3107 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3108 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3109 #endif |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3110 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3111 // Initialize these before initializing the VirtualSpaceList |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3112 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3113 _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3114 // Make the first class chunk bigger than a medium chunk so it's not put |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3115 // on the medium chunk list. The next chunk will be small and progress |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3116 // from there. This size calculated by -version. |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3117 _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3118 (CompressedClassSpaceSize/BytesPerWord)*2); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3119 _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3120 // Arbitrarily set the initial virtual space to a multiple |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3121 // of the boot class loader size. |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3122 size_t word_size = VIRTUALSPACEMULTIPLIER * _first_chunk_word_size; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3123 word_size = align_size_up(word_size, Metaspace::reserve_alignment_words()); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3124 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3125 // Initialize the list of virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3126 _space_list = new VirtualSpaceList(word_size); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3127 _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3128 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3129 if (!_space_list->initialization_succeeded()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3130 vm_exit_during_initialization("Unable to setup metadata virtual space list.", NULL); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3131 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3132 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3133 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3134 MetaspaceGC::initialize(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3135 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3136 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3137 Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3138 size_t chunk_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3139 size_t chunk_bunch) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3140 // Get a chunk from the chunk freelist |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3141 Metachunk* chunk = get_chunk_manager(mdtype)->chunk_freelist_allocate(chunk_word_size); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3142 if (chunk != NULL) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3143 return chunk; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3144 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3145 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3146 return get_space_list(mdtype)->get_new_chunk(chunk_word_size, chunk_word_size, chunk_bunch); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3147 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3148 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3149 void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3150 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3151 assert(space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3152 "Metadata VirtualSpaceList has not been initialized"); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3153 assert(chunk_manager_metadata() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3154 "Metadata ChunkManager has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3155 |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3156 _vsm = new SpaceManager(NonClassType, lock); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3157 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3158 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3159 } |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3160 size_t word_size; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3161 size_t class_word_size; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3162 vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3163 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3164 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3165 assert(class_space_list() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3166 "Class VirtualSpaceList has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3167 assert(chunk_manager_class() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3168 "Class ChunkManager has not been initialized"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3169 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3170 // Allocate SpaceManager for classes. |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3171 _class_vsm = new SpaceManager(ClassType, lock); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3172 if (_class_vsm == NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3173 return; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3174 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3175 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3176 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3177 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3178 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3179 // Allocate chunk for metadata objects |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3180 Metachunk* new_chunk = get_initialization_chunk(NonClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3181 word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3182 vsm()->medium_chunk_bunch()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3183 assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3184 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3185 // Add to this manager's list of chunks in use and current_chunk(). |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3186 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3187 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3188 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3189 // Allocate chunk for class metadata objects |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3190 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3191 Metachunk* class_chunk = get_initialization_chunk(ClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3192 class_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3193 class_vsm()->medium_chunk_bunch()); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3194 if (class_chunk != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3195 class_vsm()->add_chunk(class_chunk, true); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3196 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3197 } |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3198 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3199 _alloc_record_head = NULL; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3200 _alloc_record_tail = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3201 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3202 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3203 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
|
3204 size_t byte_size = word_size * wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3205 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
|
3206 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3207 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3208 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3209 // DumpSharedSpaces doesn't use class metadata area (yet) |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3210 // Also, don't use class_vsm() unless UseCompressedClassPointers is true. |
12340
bc918fd1e584
8025279: metaspace/flags/maxMetaspaceSize throws OOM: out of Compressed Klass space
mgerdin
parents:
12306
diff
changeset
|
3211 if (is_class_space_allocation(mdtype)) { |
6885 | 3212 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3213 } else { |
6885 | 3214 return vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3215 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3216 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3217 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3218 MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3219 size_t delta_bytes = MetaspaceGC::delta_capacity_until_GC(word_size * BytesPerWord); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3220 assert(delta_bytes > 0, "Must be"); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3221 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3222 size_t after_inc = MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
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|
3223 size_t before_inc = after_inc - delta_bytes; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
changeset
|
3224 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3225 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3226 gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3227 " to " SIZE_FORMAT, before_inc, after_inc); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3228 } |
6885 | 3229 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3230 return allocate(word_size, mdtype); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3231 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3232 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3233 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3234 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3235 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3236 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
|
3237 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3238 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3239 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
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10175
diff
changeset
|
3240 size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3241 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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parents:
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diff
changeset
|
3242 return using_class_space() ? class_vsm()->sum_used_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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parents:
11966
diff
changeset
|
3243 } else { |
740e263c80c6
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parents:
11966
diff
changeset
|
3244 return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
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parents:
11966
diff
changeset
|
3245 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3246 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3247 |
12235 | 3248 size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3249 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3250 return using_class_space() ? class_vsm()->sum_free_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3251 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3252 return vsm()->sum_free_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3253 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3254 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3255 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3256 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3257 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3258 // 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
|
3259 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3260 // is already counted in some chunk. |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3261 size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3262 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3263 return using_class_space() ? class_vsm()->sum_capacity_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3264 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3265 return vsm()->sum_capacity_in_chunks_in_use(); |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3266 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3267 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3268 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3269 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
|
3270 return used_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3271 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3272 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3273 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
|
3274 return capacity_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3275 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3276 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3277 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
|
3278 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3279 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 3280 // 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
|
3281 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
14468
aa8fab3bed11
8034171: Remove use of template template parameters from binaryTreeDictionary.
goetz
parents:
14358
diff
changeset
|
3282 if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
6885 | 3283 // Dark matter. Too small for dictionary. |
3284 #ifdef ASSERT | |
3285 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3286 #endif | |
3287 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3288 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3289 if (is_class && using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3290 class_vsm()->deallocate(ptr, word_size); |
6885 | 3291 } else { |
3292 vsm()->deallocate(ptr, word_size); | |
3293 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3294 } 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
|
3295 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
|
3296 |
14468
aa8fab3bed11
8034171: Remove use of template template parameters from binaryTreeDictionary.
goetz
parents:
14358
diff
changeset
|
3297 if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
6885 | 3298 // Dark matter. Too small for dictionary. |
3299 #ifdef ASSERT | |
3300 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3301 #endif | |
3302 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3303 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3304 if (is_class && using_class_space()) { |
6885 | 3305 class_vsm()->deallocate(ptr, word_size); |
3306 } else { | |
3307 vsm()->deallocate(ptr, word_size); | |
3308 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3309 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3310 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3311 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3312 |
12902 | 3313 MetaWord* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3314 bool read_only, MetaspaceObj::Type type, TRAPS) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3315 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3316 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3317 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3318 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3319 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3320 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
|
3321 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3322 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3323 // 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
|
3324 // 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
|
3325 // to revisit this for application class data sharing. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3326 if (DumpSharedSpaces) { |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3327 assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3328 Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3329 MetaWord* result = space->allocate(word_size, NonClassType); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3330 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3331 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3332 } |
12902 | 3333 |
3334 space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); | |
3335 | |
3336 // Zero initialize. | |
3337 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3338 | |
3339 return result; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3340 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3341 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3342 MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3343 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3344 // Try to allocate metadata. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3345 MetaWord* result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3346 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3347 if (result == NULL) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3348 // Allocation failed. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3349 if (is_init_completed()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3350 // Only start a GC if the bootstrapping has completed. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3351 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3352 // Try to clean out some memory and retry. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3353 result = Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3354 loader_data, word_size, mdtype); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3355 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3356 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3357 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3358 if (result == NULL) { |
12980
91a88c8450f4
8026698: Incorrect error handling in Metaspace::allocate
mgerdin
parents:
12979
diff
changeset
|
3359 report_metadata_oome(loader_data, word_size, mdtype, CHECK_NULL); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3360 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3361 |
12902 | 3362 // Zero initialize. |
3363 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3364 | |
3365 return result; | |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3366 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3367 |
12998
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3368 size_t Metaspace::class_chunk_size(size_t word_size) { |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
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diff
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|
3369 assert(using_class_space(), "Has to use class space"); |
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8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
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parents:
12906
diff
changeset
|
3370 return class_vsm()->calc_chunk_size(word_size); |
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diff
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|
3371 } |
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12906
diff
changeset
|
3372 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
changeset
|
3373 void Metaspace::report_metadata_oome(ClassLoaderData* loader_data, size_t word_size, MetadataType mdtype, TRAPS) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
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|
3374 // If result is still null, we are out of memory. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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parents:
12340
diff
changeset
|
3375 if (Verbose && TraceMetadataChunkAllocation) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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parents:
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diff
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|
3376 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
changeset
|
3377 SIZE_FORMAT, word_size); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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diff
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|
3378 if (loader_data->metaspace_or_null() != NULL) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
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|
3379 loader_data->dump(gclog_or_tty); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3380 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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diff
changeset
|
3381 MetaspaceAux::dump(gclog_or_tty); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3382 } |
12838
85c1ca43713f
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diff
changeset
|
3383 |
12998
a6177f601c64
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hseigel
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12906
diff
changeset
|
3384 bool out_of_compressed_class_space = false; |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
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diff
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|
3385 if (is_class_space_allocation(mdtype)) { |
a6177f601c64
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hseigel
parents:
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diff
changeset
|
3386 Metaspace* metaspace = loader_data->metaspace_non_null(); |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3387 out_of_compressed_class_space = |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3388 MetaspaceAux::committed_bytes(Metaspace::ClassType) + |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3389 (metaspace->class_chunk_size(word_size) * BytesPerWord) > |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3390 CompressedClassSpaceSize; |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3391 } |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
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diff
changeset
|
3392 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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diff
changeset
|
3393 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
12998
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3394 const char* space_string = out_of_compressed_class_space ? |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3395 "Compressed class space" : "Metaspace"; |
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
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diff
changeset
|
3396 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3397 report_java_out_of_memory(space_string); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3398 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3399 if (JvmtiExport::should_post_resource_exhausted()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3400 JvmtiExport::post_resource_exhausted( |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3401 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3402 space_string); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3403 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3404 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3405 if (!is_init_completed()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
changeset
|
3406 vm_exit_during_initialization("OutOfMemoryError", space_string); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3407 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3408 |
12998
a6177f601c64
8026822: metaspace/flags/maxMetaspaceSize throws OOM of unexpected type.java.lang.OutOfMemoryError: Compressed class space
hseigel
parents:
12906
diff
changeset
|
3409 if (out_of_compressed_class_space) { |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3410 THROW_OOP(Universe::out_of_memory_error_class_metaspace()); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3411 } else { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3412 THROW_OOP(Universe::out_of_memory_error_metaspace()); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3413 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3414 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3415 |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3416 void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3417 assert(DumpSharedSpaces, "sanity"); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3418 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3419 AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3420 if (_alloc_record_head == NULL) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3421 _alloc_record_head = _alloc_record_tail = rec; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3422 } else { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3423 _alloc_record_tail->_next = rec; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3424 _alloc_record_tail = rec; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3425 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3426 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3427 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3428 void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3429 assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3430 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3431 address last_addr = (address)bottom(); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3432 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3433 for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3434 address ptr = rec->_ptr; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3435 if (last_addr < ptr) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3436 closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3437 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3438 closure->doit(ptr, rec->_type, rec->_byte_size); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3439 last_addr = ptr + rec->_byte_size; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3440 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3441 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3442 address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3443 if (last_addr < top) { |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3444 closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3445 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3446 } |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3447 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3448 void Metaspace::purge(MetadataType mdtype) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3449 get_space_list(mdtype)->purge(get_chunk_manager(mdtype)); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3450 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3451 |
10175 | 3452 void Metaspace::purge() { |
3453 MutexLockerEx cl(SpaceManager::expand_lock(), | |
3454 Mutex::_no_safepoint_check_flag); | |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3455 purge(NonClassType); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3456 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3457 purge(ClassType); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3458 } |
10175 | 3459 } |
3460 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3461 void Metaspace::print_on(outputStream* out) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3462 // Print both class virtual space counts and metaspace. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3463 if (Verbose) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3464 vsm()->print_on(out); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3465 if (using_class_space()) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3466 class_vsm()->print_on(out); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3467 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3468 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3469 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3470 |
14190
ce86c36b8921
8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace::contains
coleenp
parents:
13068
diff
changeset
|
3471 bool Metaspace::contains(const void* ptr) { |
ce86c36b8921
8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace::contains
coleenp
parents:
13068
diff
changeset
|
3472 if (vsm()->contains(ptr)) return true; |
ce86c36b8921
8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace::contains
coleenp
parents:
13068
diff
changeset
|
3473 if (using_class_space()) { |
ce86c36b8921
8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace::contains
coleenp
parents:
13068
diff
changeset
|
3474 return class_vsm()->contains(ptr); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3475 } |
14190
ce86c36b8921
8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace::contains
coleenp
parents:
13068
diff
changeset
|
3476 return false; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3477 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3478 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3479 void Metaspace::verify() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3480 vsm()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3481 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3482 class_vsm()->verify(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3483 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3484 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3485 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3486 void Metaspace::dump(outputStream* const out) const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3487 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3488 vsm()->dump(out); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3489 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3490 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3491 class_vsm()->dump(out); |
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3492 } |
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|
3493 } |
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3494 |
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3495 /////////////// Unit tests /////////////// |
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3496 |
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3497 #ifndef PRODUCT |
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3498 |
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3499 class TestMetaspaceAuxTest : AllStatic { |
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3500 public: |
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|
3501 static void test_reserved() { |
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3502 size_t reserved = MetaspaceAux::reserved_bytes(); |
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3503 |
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|
3504 assert(reserved > 0, "assert"); |
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3505 |
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3506 size_t committed = MetaspaceAux::committed_bytes(); |
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|
3507 assert(committed <= reserved, "assert"); |
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3508 |
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3509 size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
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3510 assert(reserved_metadata > 0, "assert"); |
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|
3511 assert(reserved_metadata <= reserved, "assert"); |
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|
3512 |
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|
3513 if (UseCompressedClassPointers) { |
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3514 size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
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|
3515 assert(reserved_class > 0, "assert"); |
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|
3516 assert(reserved_class < reserved, "assert"); |
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|
3517 } |
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|
3518 } |
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|
3519 |
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|
3520 static void test_committed() { |
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3521 size_t committed = MetaspaceAux::committed_bytes(); |
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|
3522 |
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|
3523 assert(committed > 0, "assert"); |
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|
3524 |
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|
3525 size_t reserved = MetaspaceAux::reserved_bytes(); |
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|
3526 assert(committed <= reserved, "assert"); |
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|
3527 |
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|
3528 size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
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|
3529 assert(committed_metadata > 0, "assert"); |
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|
3530 assert(committed_metadata <= committed, "assert"); |
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|
3531 |
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|
3532 if (UseCompressedClassPointers) { |
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|
3533 size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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|
3534 assert(committed_class > 0, "assert"); |
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|
3535 assert(committed_class < committed, "assert"); |
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|
3536 } |
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|
3537 } |
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|
3538 |
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|
3539 static void test_virtual_space_list_large_chunk() { |
03f493ce3a71
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|
3540 VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity()); |
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|
3541 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
3542 // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be |
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|
3543 // vm_allocation_granularity aligned on Windows. |
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|
3544 size_t large_size = (size_t)(2*256*K + (os::vm_page_size()/BytesPerWord)); |
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|
3545 large_size += (os::vm_page_size()/BytesPerWord); |
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|
3546 vs_list->get_new_chunk(large_size, large_size, 0); |
03f493ce3a71
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|
3547 } |
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|
3548 |
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|
3549 static void test() { |
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|
3550 test_reserved(); |
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|
3551 test_committed(); |
12306
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|
3552 test_virtual_space_list_large_chunk(); |
12236
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|
3553 } |
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|
3554 }; |
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|
3555 |
12306
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|
3556 void TestMetaspaceAux_test() { |
03f493ce3a71
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|
3557 TestMetaspaceAuxTest::test(); |
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|
3558 } |
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|
3559 |
12979
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|
3560 class TestVirtualSpaceNodeTest { |
1d1ea10fe09f
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|
3561 static void chunk_up(size_t words_left, size_t& num_medium_chunks, |
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|
3562 size_t& num_small_chunks, |
1d1ea10fe09f
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|
3563 size_t& num_specialized_chunks) { |
1d1ea10fe09f
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|
3564 num_medium_chunks = words_left / MediumChunk; |
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|
3565 words_left = words_left % MediumChunk; |
1d1ea10fe09f
8015255: NPG: Don't waste fragment at the end of a VirtualSpaceNode before retiring it.
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|
3566 |
1d1ea10fe09f
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|
3567 num_small_chunks = words_left / SmallChunk; |
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|
3568 words_left = words_left % SmallChunk; |
1d1ea10fe09f
8015255: NPG: Don't waste fragment at the end of a VirtualSpaceNode before retiring it.
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diff
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|
3569 // how many specialized chunks can we get? |
1d1ea10fe09f
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|
3570 num_specialized_chunks = words_left / SpecializedChunk; |
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|
3571 assert(words_left % SpecializedChunk == 0, "should be nothing left"); |
1d1ea10fe09f
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|
3572 } |
1d1ea10fe09f
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changeset
|
3573 |
1d1ea10fe09f
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diff
changeset
|
3574 public: |
1d1ea10fe09f
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|
3575 static void test() { |
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|
3576 MutexLockerEx ml(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
3577 const size_t vsn_test_size_words = MediumChunk * 4; |
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|
3578 const size_t vsn_test_size_bytes = vsn_test_size_words * BytesPerWord; |
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|
3579 |
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|
3580 // The chunk sizes must be multiples of eachother, or this will fail |
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|
3581 STATIC_ASSERT(MediumChunk % SmallChunk == 0); |
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|
3582 STATIC_ASSERT(SmallChunk % SpecializedChunk == 0); |
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|
3583 |
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|
3584 { // No committed memory in VSN |
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|
3585 ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
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|
3586 VirtualSpaceNode vsn(vsn_test_size_bytes); |
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|
3587 vsn.initialize(); |
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|
3588 vsn.retire(&cm); |
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|
3589 assert(cm.sum_free_chunks_count() == 0, "did not commit any memory in the VSN"); |
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|
3590 } |
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changeset
|
3591 |
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|
3592 { // All of VSN is committed, half is used by chunks |
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|
3593 ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
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|
3594 VirtualSpaceNode vsn(vsn_test_size_bytes); |
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|
3595 vsn.initialize(); |
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|
3596 vsn.expand_by(vsn_test_size_words, vsn_test_size_words); |
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|
3597 vsn.get_chunk_vs(MediumChunk); |
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|
3598 vsn.get_chunk_vs(MediumChunk); |
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|
3599 vsn.retire(&cm); |
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|
3600 assert(cm.sum_free_chunks_count() == 2, "should have been memory left for 2 medium chunks"); |
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|
3601 assert(cm.sum_free_chunks() == 2*MediumChunk, "sizes should add up"); |
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|
3602 } |
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|
3603 |
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|
3604 { // 4 pages of VSN is committed, some is used by chunks |
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|
3605 ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
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|
3606 VirtualSpaceNode vsn(vsn_test_size_bytes); |
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3607 const size_t page_chunks = 4 * (size_t)os::vm_page_size() / BytesPerWord; |
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3608 assert(page_chunks < MediumChunk, "Test expects medium chunks to be at least 4*page_size"); |
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3609 vsn.initialize(); |
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3610 vsn.expand_by(page_chunks, page_chunks); |
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3611 vsn.get_chunk_vs(SmallChunk); |
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3612 vsn.get_chunk_vs(SpecializedChunk); |
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3613 vsn.retire(&cm); |
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|
3614 |
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|
3615 // committed - used = words left to retire |
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3616 const size_t words_left = page_chunks - SmallChunk - SpecializedChunk; |
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3617 |
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3618 size_t num_medium_chunks, num_small_chunks, num_spec_chunks; |
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3619 chunk_up(words_left, num_medium_chunks, num_small_chunks, num_spec_chunks); |
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3620 |
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3621 assert(num_medium_chunks == 0, "should not get any medium chunks"); |
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3622 assert(cm.sum_free_chunks_count() == (num_small_chunks + num_spec_chunks), "should be space for 3 chunks"); |
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3623 assert(cm.sum_free_chunks() == words_left, "sizes should add up"); |
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|
3624 } |
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|
3625 |
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3626 { // Half of VSN is committed, a humongous chunk is used |
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3627 ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
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3628 VirtualSpaceNode vsn(vsn_test_size_bytes); |
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3629 vsn.initialize(); |
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3630 vsn.expand_by(MediumChunk * 2, MediumChunk * 2); |
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3631 vsn.get_chunk_vs(MediumChunk + SpecializedChunk); // Humongous chunks will be aligned up to MediumChunk + SpecializedChunk |
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3632 vsn.retire(&cm); |
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3633 |
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3634 const size_t words_left = MediumChunk * 2 - (MediumChunk + SpecializedChunk); |
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3635 size_t num_medium_chunks, num_small_chunks, num_spec_chunks; |
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3636 chunk_up(words_left, num_medium_chunks, num_small_chunks, num_spec_chunks); |
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|
3637 |
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3638 assert(num_medium_chunks == 0, "should not get any medium chunks"); |
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3639 assert(cm.sum_free_chunks_count() == (num_small_chunks + num_spec_chunks), "should be space for 3 chunks"); |
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|
3640 assert(cm.sum_free_chunks() == words_left, "sizes should add up"); |
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|
3641 } |
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3642 |
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3643 } |
14211
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3644 |
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3645 #define assert_is_available_positive(word_size) \ |
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3646 assert(vsn.is_available(word_size), \ |
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3647 err_msg(#word_size ": " PTR_FORMAT " bytes were not available in " \ |
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3648 "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \ |
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3649 (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end())); |
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3650 |
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3651 #define assert_is_available_negative(word_size) \ |
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3652 assert(!vsn.is_available(word_size), \ |
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3653 err_msg(#word_size ": " PTR_FORMAT " bytes should not be available in " \ |
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3654 "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \ |
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3655 (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end())); |
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3656 |
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3657 static void test_is_available_positive() { |
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3658 // Reserve some memory. |
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3659 VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
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|
3660 assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
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|
3661 |
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|
3662 // Commit some memory. |
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|
3663 size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
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3664 bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
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|
3665 assert(expanded, "Failed to commit"); |
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|
3666 |
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|
3667 // Check that is_available accepts the committed size. |
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|
3668 assert_is_available_positive(commit_word_size); |
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|
3669 |
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|
3670 // Check that is_available accepts half the committed size. |
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3671 size_t expand_word_size = commit_word_size / 2; |
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|
3672 assert_is_available_positive(expand_word_size); |
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|
3673 } |
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|
3674 |
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|
3675 static void test_is_available_negative() { |
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|
3676 // Reserve some memory. |
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|
3677 VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
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|
3678 assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
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|
3679 |
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|
3680 // Commit some memory. |
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|
3681 size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
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|
3682 bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
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|
3683 assert(expanded, "Failed to commit"); |
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|
3684 |
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|
3685 // Check that is_available doesn't accept a too large size. |
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|
3686 size_t two_times_commit_word_size = commit_word_size * 2; |
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|
3687 assert_is_available_negative(two_times_commit_word_size); |
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|
3688 } |
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|
3689 |
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|
3690 static void test_is_available_overflow() { |
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|
3691 // Reserve some memory. |
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|
3692 VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
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|
3693 assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
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|
3694 |
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|
3695 // Commit some memory. |
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3696 size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
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3697 bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
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|
3698 assert(expanded, "Failed to commit"); |
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|
3699 |
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|
3700 // Calculate a size that will overflow the virtual space size. |
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3701 void* virtual_space_max = (void*)(uintptr_t)-1; |
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3702 size_t bottom_to_max = pointer_delta(virtual_space_max, vsn.bottom(), 1); |
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3703 size_t overflow_size = bottom_to_max + BytesPerWord; |
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3704 size_t overflow_word_size = overflow_size / BytesPerWord; |
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3705 |
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3706 // Check that is_available can handle the overflow. |
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3707 assert_is_available_negative(overflow_word_size); |
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3708 } |
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3709 |
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3710 static void test_is_available() { |
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3711 TestVirtualSpaceNodeTest::test_is_available_positive(); |
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3712 TestVirtualSpaceNodeTest::test_is_available_negative(); |
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3713 TestVirtualSpaceNodeTest::test_is_available_overflow(); |
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3714 } |
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3715 }; |
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3716 |
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3717 void TestVirtualSpaceNode_test() { |
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3718 TestVirtualSpaceNodeTest::test(); |
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3719 TestVirtualSpaceNodeTest::test_is_available(); |
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3720 } |
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3721 |
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3722 #endif |