Mercurial > hg > truffle
annotate src/share/vm/memory/metaspace.cpp @ 12962:5ccbab1c69f3
8026251: New type profiling points: parameters to methods
Summary: x86 interpreter and c1 type profiling for parameters on method entries
Reviewed-by: kvn, twisti
author | roland |
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date | Tue, 22 Oct 2013 09:51:47 +0200 |
parents | 94c0343b1887 |
children | 1d1ea10fe09f a6177f601c64 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 #include "precompiled.hpp" |
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25 #include "gc_interface/collectedHeap.hpp" |
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26 #include "memory/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 |
6885 | 49 typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
50 typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; | |
12902 | 51 |
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::_class_metaspace_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 HumongousChunkGranularity = 8 |
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80 }; |
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81 |
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82 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 83 assert(i < NumberOfInUseLists, "Out of bound"); |
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84 return (ChunkIndex) (i+1); |
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85 } |
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86 |
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87 volatile intptr_t MetaspaceGC::_capacity_until_GC = 0; |
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88 uint MetaspaceGC::_shrink_factor = 0; |
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89 bool MetaspaceGC::_should_concurrent_collect = false; |
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90 |
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91 typedef class FreeList<Metachunk> ChunkList; |
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92 |
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93 // Manages the global free lists of chunks. |
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94 class ChunkManager : public CHeapObj<mtInternal> { |
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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 |
6885 | 101 ChunkList _free_chunks[NumberOfFreeLists]; |
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 public: |
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261 |
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262 VirtualSpaceNode(size_t byte_size); |
10175 | 263 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
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264 ~VirtualSpaceNode(); |
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265 |
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266 // Convenience functions for logical bottom and end |
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267 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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268 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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269 |
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270 size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
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271 size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
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272 |
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273 bool is_pre_committed() const { return _virtual_space.special(); } |
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274 |
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275 // address of next available space in _virtual_space; |
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276 // Accessors |
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277 VirtualSpaceNode* next() { return _next; } |
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278 void set_next(VirtualSpaceNode* v) { _next = v; } |
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279 |
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280 void set_reserved(MemRegion const v) { _reserved = v; } |
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281 void set_top(MetaWord* v) { _top = v; } |
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282 |
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283 // Accessors |
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284 MemRegion* reserved() { return &_reserved; } |
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285 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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286 |
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287 // Returns true if "word_size" is available in the VirtualSpace |
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288 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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289 |
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290 MetaWord* top() const { return _top; } |
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291 void inc_top(size_t word_size) { _top += word_size; } |
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292 |
10175 | 293 uintx container_count() { return _container_count; } |
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294 void inc_container_count(); |
10175 | 295 void dec_container_count(); |
296 #ifdef ASSERT | |
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297 uint container_count_slow(); |
10175 | 298 void verify_container_count(); |
299 #endif | |
300 | |
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301 // used and capacity in this single entry in the list |
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302 size_t used_words_in_vs() const; |
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303 size_t capacity_words_in_vs() const; |
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304 size_t free_words_in_vs() const; |
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305 |
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306 bool initialize(); |
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307 |
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308 // get space from the virtual space |
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309 Metachunk* take_from_committed(size_t chunk_word_size); |
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310 |
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311 // Allocate a chunk from the virtual space and return it. |
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312 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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313 |
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314 // Expands/shrinks the committed space in a virtual space. Delegates |
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315 // to Virtualspace |
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316 bool expand_by(size_t min_words, size_t preferred_words); |
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317 |
10175 | 318 // In preparation for deleting this node, remove all the chunks |
319 // in the node from any freelist. | |
320 void purge(ChunkManager* chunk_manager); | |
321 | |
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322 #ifdef ASSERT |
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323 // Debug support |
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324 void mangle(); |
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325 #endif |
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326 |
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327 void print_on(outputStream* st) const; |
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328 }; |
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329 |
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330 #define assert_is_ptr_aligned(ptr, alignment) \ |
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331 assert(is_ptr_aligned(ptr, alignment), \ |
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332 err_msg(PTR_FORMAT " is not aligned to " \ |
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333 SIZE_FORMAT, ptr, alignment)) |
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334 |
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335 #define assert_is_size_aligned(size, alignment) \ |
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336 assert(is_size_aligned(size, alignment), \ |
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337 err_msg(SIZE_FORMAT " is not aligned to " \ |
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338 SIZE_FORMAT, size, alignment)) |
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339 |
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340 |
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341 // Decide if large pages should be committed when the memory is reserved. |
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342 static bool should_commit_large_pages_when_reserving(size_t bytes) { |
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343 if (UseLargePages && UseLargePagesInMetaspace && !os::can_commit_large_page_memory()) { |
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344 size_t words = bytes / BytesPerWord; |
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345 bool is_class = false; // We never reserve large pages for the class space. |
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346 if (MetaspaceGC::can_expand(words, is_class) && |
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347 MetaspaceGC::allowed_expansion() >= words) { |
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348 return true; |
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349 } |
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350 } |
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351 |
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352 return false; |
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353 } |
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354 |
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355 // byte_size is the size of the associated virtualspace. |
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356 VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
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357 assert_is_size_aligned(bytes, Metaspace::reserve_alignment()); |
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358 |
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359 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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360 // configurable address, generally at the top of the Java heap so other |
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361 // memory addresses don't conflict. |
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362 if (DumpSharedSpaces) { |
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363 bool large_pages = false; // No large pages when dumping the CDS archive. |
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364 char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment()); |
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365 |
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366 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base, 0); |
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367 if (_rs.is_reserved()) { |
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368 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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369 } else { |
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370 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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371 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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372 } |
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373 MetaspaceShared::set_shared_rs(&_rs); |
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374 } else { |
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375 bool large_pages = should_commit_large_pages_when_reserving(bytes); |
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376 |
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377 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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378 } |
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379 |
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380 if (_rs.is_reserved()) { |
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381 assert(_rs.base() != NULL, "Catch if we get a NULL address"); |
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382 assert(_rs.size() != 0, "Catch if we get a 0 size"); |
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383 assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment()); |
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384 assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment()); |
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385 |
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386 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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387 } |
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388 } |
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389 |
10175 | 390 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
391 Metachunk* chunk = first_chunk(); | |
392 Metachunk* invalid_chunk = (Metachunk*) top(); | |
393 while (chunk < invalid_chunk ) { | |
12902 | 394 assert(chunk->is_tagged_free(), "Should be tagged free"); |
395 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
396 chunk_manager->remove_chunk(chunk); | |
397 assert(chunk->next() == NULL && | |
398 chunk->prev() == NULL, | |
399 "Was not removed from its list"); | |
400 chunk = (Metachunk*) next; | |
10175 | 401 } |
402 } | |
403 | |
404 #ifdef ASSERT | |
405 uint VirtualSpaceNode::container_count_slow() { | |
406 uint count = 0; | |
407 Metachunk* chunk = first_chunk(); | |
408 Metachunk* invalid_chunk = (Metachunk*) top(); | |
409 while (chunk < invalid_chunk ) { | |
410 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
411 // Don't count the chunks on the free lists. Those are | |
412 // still part of the VirtualSpaceNode but not currently | |
413 // counted. | |
12902 | 414 if (!chunk->is_tagged_free()) { |
10175 | 415 count++; |
416 } | |
417 chunk = (Metachunk*) next; | |
418 } | |
419 return count; | |
420 } | |
421 #endif | |
422 | |
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423 // List of VirtualSpaces for metadata allocation. |
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424 class VirtualSpaceList : public CHeapObj<mtClass> { |
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425 friend class VirtualSpaceNode; |
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426 |
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427 enum VirtualSpaceSizes { |
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428 VirtualSpaceSize = 256 * K |
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429 }; |
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430 |
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431 // Head of the list |
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432 VirtualSpaceNode* _virtual_space_list; |
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433 // virtual space currently being used for allocations |
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434 VirtualSpaceNode* _current_virtual_space; |
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435 |
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436 // Is this VirtualSpaceList used for the compressed class space |
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437 bool _is_class; |
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438 |
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439 // Sum of reserved and committed memory in the virtual spaces |
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440 size_t _reserved_words; |
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441 size_t _committed_words; |
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442 |
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443 // Number of virtual spaces |
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444 size_t _virtual_space_count; |
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445 |
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446 ~VirtualSpaceList(); |
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447 |
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448 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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449 |
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450 void set_virtual_space_list(VirtualSpaceNode* v) { |
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451 _virtual_space_list = v; |
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452 } |
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453 void set_current_virtual_space(VirtualSpaceNode* v) { |
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454 _current_virtual_space = v; |
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455 } |
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456 |
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457 void link_vs(VirtualSpaceNode* new_entry); |
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458 |
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459 // Get another virtual space and add it to the list. This |
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460 // is typically prompted by a failed attempt to allocate a chunk |
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461 // and is typically followed by the allocation of a chunk. |
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462 bool create_new_virtual_space(size_t vs_word_size); |
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463 |
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464 public: |
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465 VirtualSpaceList(size_t word_size); |
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466 VirtualSpaceList(ReservedSpace rs); |
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467 |
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468 size_t free_bytes(); |
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469 |
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470 Metachunk* get_new_chunk(size_t word_size, |
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471 size_t grow_chunks_by_words, |
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472 size_t medium_chunk_bunch); |
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473 |
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474 bool expand_node_by(VirtualSpaceNode* node, |
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475 size_t min_words, |
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476 size_t preferred_words); |
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477 |
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478 bool expand_by(size_t min_words, |
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479 size_t preferred_words); |
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480 |
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481 VirtualSpaceNode* current_virtual_space() { |
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482 return _current_virtual_space; |
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483 } |
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484 |
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485 bool is_class() const { return _is_class; } |
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486 |
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487 bool initialization_succeeded() { return _virtual_space_list != NULL; } |
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488 |
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489 size_t reserved_words() { return _reserved_words; } |
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490 size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
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491 size_t committed_words() { return _committed_words; } |
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492 size_t committed_bytes() { return committed_words() * BytesPerWord; } |
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493 |
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494 void inc_reserved_words(size_t v); |
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495 void dec_reserved_words(size_t v); |
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496 void inc_committed_words(size_t v); |
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497 void dec_committed_words(size_t v); |
10175 | 498 void inc_virtual_space_count(); |
499 void dec_virtual_space_count(); | |
500 | |
501 // Unlink empty VirtualSpaceNodes and free it. | |
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502 void purge(ChunkManager* chunk_manager); |
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503 |
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504 bool contains(const void *ptr); |
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505 |
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506 void print_on(outputStream* st) const; |
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507 |
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508 class VirtualSpaceListIterator : public StackObj { |
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509 VirtualSpaceNode* _virtual_spaces; |
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510 public: |
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511 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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512 _virtual_spaces(virtual_spaces) {} |
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513 |
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514 bool repeat() { |
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515 return _virtual_spaces != NULL; |
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516 } |
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517 |
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518 VirtualSpaceNode* get_next() { |
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519 VirtualSpaceNode* result = _virtual_spaces; |
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520 if (_virtual_spaces != NULL) { |
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521 _virtual_spaces = _virtual_spaces->next(); |
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522 } |
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523 return result; |
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524 } |
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525 }; |
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526 }; |
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527 |
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528 class Metadebug : AllStatic { |
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529 // Debugging support for Metaspaces |
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530 static int _allocation_fail_alot_count; |
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531 |
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532 public: |
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533 |
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534 static void init_allocation_fail_alot_count(); |
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535 #ifdef ASSERT |
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536 static bool test_metadata_failure(); |
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537 #endif |
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538 }; |
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539 |
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540 int Metadebug::_allocation_fail_alot_count = 0; |
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541 |
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542 // SpaceManager - used by Metaspace to handle allocations |
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543 class SpaceManager : public CHeapObj<mtClass> { |
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544 friend class Metaspace; |
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545 friend class Metadebug; |
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546 |
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547 private: |
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548 |
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549 // protects allocations and contains. |
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550 Mutex* const _lock; |
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551 |
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552 // Type of metadata allocated. |
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553 Metaspace::MetadataType _mdtype; |
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554 |
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555 // List of chunks in use by this SpaceManager. Allocations |
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556 // are done from the current chunk. The list is used for deallocating |
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557 // chunks when the SpaceManager is freed. |
6885 | 558 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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559 Metachunk* _current_chunk; |
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560 |
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561 // Number of small chunks to allocate to a manager |
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562 // If class space manager, small chunks are unlimited |
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563 static uint const _small_chunk_limit; |
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564 |
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565 // Sum of all space in allocated chunks |
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566 size_t _allocated_blocks_words; |
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567 |
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568 // Sum of all allocated chunks |
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569 size_t _allocated_chunks_words; |
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570 size_t _allocated_chunks_count; |
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571 |
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572 // Free lists of blocks are per SpaceManager since they |
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573 // are assumed to be in chunks in use by the SpaceManager |
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574 // and all chunks in use by a SpaceManager are freed when |
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575 // the class loader using the SpaceManager is collected. |
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576 BlockFreelist _block_freelists; |
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577 |
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578 // protects virtualspace and chunk expansions |
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579 static const char* _expand_lock_name; |
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580 static const int _expand_lock_rank; |
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581 static Mutex* const _expand_lock; |
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582 |
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583 private: |
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584 // Accessors |
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585 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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586 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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587 |
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588 BlockFreelist* block_freelists() const { |
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589 return (BlockFreelist*) &_block_freelists; |
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590 } |
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591 |
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592 Metaspace::MetadataType mdtype() { return _mdtype; } |
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593 |
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594 VirtualSpaceList* vs_list() const { return Metaspace::get_space_list(_mdtype); } |
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595 ChunkManager* chunk_manager() const { return Metaspace::get_chunk_manager(_mdtype); } |
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596 |
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597 Metachunk* current_chunk() const { return _current_chunk; } |
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598 void set_current_chunk(Metachunk* v) { |
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599 _current_chunk = v; |
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600 } |
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601 |
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602 Metachunk* find_current_chunk(size_t word_size); |
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603 |
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604 // Add chunk to the list of chunks in use |
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605 void add_chunk(Metachunk* v, bool make_current); |
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606 void retire_current_chunk(); |
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607 |
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608 Mutex* lock() const { return _lock; } |
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609 |
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610 const char* chunk_size_name(ChunkIndex index) const; |
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611 |
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612 protected: |
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613 void initialize(); |
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614 |
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615 public: |
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616 SpaceManager(Metaspace::MetadataType mdtype, |
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617 Mutex* lock); |
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618 ~SpaceManager(); |
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619 |
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620 enum ChunkMultiples { |
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621 MediumChunkMultiple = 4 |
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622 }; |
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623 |
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624 bool is_class() { return _mdtype == Metaspace::ClassType; } |
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625 |
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626 // Accessors |
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627 size_t specialized_chunk_size() { return SpecializedChunk; } |
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628 size_t small_chunk_size() { return (size_t) is_class() ? ClassSmallChunk : SmallChunk; } |
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629 size_t medium_chunk_size() { return (size_t) is_class() ? ClassMediumChunk : MediumChunk; } |
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630 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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631 |
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632 size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
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633 size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
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634 size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
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635 size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
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636 |
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637 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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638 |
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639 static Mutex* expand_lock() { return _expand_lock; } |
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640 |
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641 // Increment the per Metaspace and global running sums for Metachunks |
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642 // by the given size. This is used when a Metachunk to added to |
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643 // the in-use list. |
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644 void inc_size_metrics(size_t words); |
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645 // Increment the per Metaspace and global running sums Metablocks by the given |
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646 // size. This is used when a Metablock is allocated. |
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647 void inc_used_metrics(size_t words); |
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648 // Delete the portion of the running sums for this SpaceManager. That is, |
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649 // the globals running sums for the Metachunks and Metablocks are |
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650 // decremented for all the Metachunks in-use by this SpaceManager. |
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651 void dec_total_from_size_metrics(); |
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652 |
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653 // Set the sizes for the initial chunks. |
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654 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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655 size_t* chunk_word_size, |
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656 size_t* class_chunk_word_size); |
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657 |
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658 size_t sum_capacity_in_chunks_in_use() const; |
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659 size_t sum_used_in_chunks_in_use() const; |
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660 size_t sum_free_in_chunks_in_use() const; |
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661 size_t sum_waste_in_chunks_in_use() const; |
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662 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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663 |
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664 size_t sum_count_in_chunks_in_use(); |
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665 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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666 |
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667 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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668 |
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669 // Block allocation and deallocation. |
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670 // Allocates a block from the current chunk |
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671 MetaWord* allocate(size_t word_size); |
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672 |
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673 // Helper for allocations |
6885 | 674 MetaWord* allocate_work(size_t word_size); |
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675 |
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676 // Returns a block to the per manager freelist |
6885 | 677 void deallocate(MetaWord* p, size_t word_size); |
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678 |
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679 // Based on the allocation size and a minimum chunk size, |
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680 // returned chunk size (for expanding space for chunk allocation). |
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681 size_t calc_chunk_size(size_t allocation_word_size); |
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682 |
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683 // Called when an allocation from the current chunk fails. |
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684 // Gets a new chunk (may require getting a new virtual space), |
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685 // and allocates from that chunk. |
6885 | 686 MetaWord* grow_and_allocate(size_t word_size); |
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687 |
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688 // Notify memory usage to MemoryService. |
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689 void track_metaspace_memory_usage(); |
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690 |
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691 // debugging support. |
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692 |
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693 void dump(outputStream* const out) const; |
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694 void print_on(outputStream* st) const; |
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695 void locked_print_chunks_in_use_on(outputStream* st) const; |
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696 |
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697 void verify(); |
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698 void verify_chunk_size(Metachunk* chunk); |
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699 NOT_PRODUCT(void mangle_freed_chunks();) |
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700 #ifdef ASSERT |
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701 void verify_allocated_blocks_words(); |
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702 #endif |
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703 |
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704 size_t get_raw_word_size(size_t word_size) { |
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705 size_t byte_size = word_size * BytesPerWord; |
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706 |
12902 | 707 size_t raw_bytes_size = MAX2(byte_size, sizeof(Metablock)); |
708 raw_bytes_size = align_size_up(raw_bytes_size, Metachunk::object_alignment()); | |
709 | |
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710 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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711 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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712 |
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713 return raw_word_size; |
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714 } |
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715 }; |
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716 |
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717 uint const SpaceManager::_small_chunk_limit = 4; |
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718 |
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719 const char* SpaceManager::_expand_lock_name = |
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720 "SpaceManager chunk allocation lock"; |
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721 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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722 Mutex* const SpaceManager::_expand_lock = |
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723 new Mutex(SpaceManager::_expand_lock_rank, |
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724 SpaceManager::_expand_lock_name, |
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725 Mutex::_allow_vm_block_flag); |
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726 |
10175 | 727 void VirtualSpaceNode::inc_container_count() { |
728 assert_lock_strong(SpaceManager::expand_lock()); | |
729 _container_count++; | |
730 assert(_container_count == container_count_slow(), | |
731 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
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732 " container_count_slow() " SIZE_FORMAT, |
10175 | 733 _container_count, container_count_slow())); |
734 } | |
735 | |
736 void VirtualSpaceNode::dec_container_count() { | |
737 assert_lock_strong(SpaceManager::expand_lock()); | |
738 _container_count--; | |
739 } | |
740 | |
741 #ifdef ASSERT | |
742 void VirtualSpaceNode::verify_container_count() { | |
743 assert(_container_count == container_count_slow(), | |
744 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
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745 " container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); |
10175 | 746 } |
747 #endif | |
748 | |
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749 // BlockFreelist methods |
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750 |
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751 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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752 |
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753 BlockFreelist::~BlockFreelist() { |
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754 if (_dictionary != NULL) { |
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755 if (Verbose && TraceMetadataChunkAllocation) { |
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756 _dictionary->print_free_lists(gclog_or_tty); |
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757 } |
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758 delete _dictionary; |
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759 } |
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760 } |
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761 |
6885 | 762 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
12902 | 763 Metablock* free_chunk = ::new (p) Metablock(word_size); |
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764 if (dictionary() == NULL) { |
6885 | 765 _dictionary = new BlockTreeDictionary(); |
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766 } |
6885 | 767 dictionary()->return_chunk(free_chunk); |
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768 } |
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769 |
6885 | 770 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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771 if (dictionary() == NULL) { |
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772 return NULL; |
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773 } |
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774 |
6885 | 775 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
776 // Dark matter. Too small for dictionary. | |
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777 return NULL; |
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778 } |
6885 | 779 |
780 Metablock* free_block = | |
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781 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
6885 | 782 if (free_block == NULL) { |
783 return NULL; | |
784 } | |
785 | |
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786 const size_t block_size = free_block->size(); |
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787 if (block_size > WasteMultiplier * word_size) { |
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788 return_block((MetaWord*)free_block, block_size); |
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789 return NULL; |
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790 } |
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791 |
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792 MetaWord* new_block = (MetaWord*)free_block; |
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793 assert(block_size >= word_size, "Incorrect size of block from freelist"); |
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794 const size_t unused = block_size - word_size; |
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795 if (unused >= TreeChunk<Metablock, FreeList>::min_size()) { |
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796 return_block(new_block + word_size, unused); |
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797 } |
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798 |
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799 return new_block; |
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800 } |
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801 |
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802 void BlockFreelist::print_on(outputStream* st) const { |
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803 if (dictionary() == NULL) { |
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804 return; |
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805 } |
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806 dictionary()->print_free_lists(st); |
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807 } |
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808 |
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809 // VirtualSpaceNode methods |
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810 |
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811 VirtualSpaceNode::~VirtualSpaceNode() { |
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812 _rs.release(); |
10175 | 813 #ifdef ASSERT |
814 size_t word_size = sizeof(*this) / BytesPerWord; | |
815 Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); | |
816 #endif | |
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817 } |
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818 |
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819 size_t VirtualSpaceNode::used_words_in_vs() const { |
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820 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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821 } |
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822 |
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823 // Space committed in the VirtualSpace |
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824 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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825 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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826 } |
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827 |
10183
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828 size_t VirtualSpaceNode::free_words_in_vs() const { |
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829 return pointer_delta(end(), top(), sizeof(MetaWord)); |
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830 } |
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831 |
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832 // Allocates the chunk from the virtual space only. |
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833 // This interface is also used internally for debugging. Not all |
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834 // chunks removed here are necessarily used for allocation. |
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835 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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836 // Bottom of the new chunk |
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837 MetaWord* chunk_limit = top(); |
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838 assert(chunk_limit != NULL, "Not safe to call this method"); |
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839 |
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840 // The virtual spaces are always expanded by the |
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841 // commit granularity to enforce the following condition. |
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842 // Without this the is_available check will not work correctly. |
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843 assert(_virtual_space.committed_size() == _virtual_space.actual_committed_size(), |
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844 "The committed memory doesn't match the expanded memory."); |
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845 |
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846 if (!is_available(chunk_word_size)) { |
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847 if (TraceMetadataChunkAllocation) { |
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848 gclog_or_tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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849 // Dump some information about the virtual space that is nearly full |
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850 print_on(gclog_or_tty); |
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851 } |
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852 return NULL; |
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853 } |
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854 |
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855 // Take the space (bump top on the current virtual space). |
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856 inc_top(chunk_word_size); |
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857 |
10175 | 858 // Initialize the chunk |
859 Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); | |
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860 return result; |
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861 } |
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862 |
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863 |
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864 // Expand the virtual space (commit more of the reserved space) |
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865 bool VirtualSpaceNode::expand_by(size_t min_words, size_t preferred_words) { |
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866 size_t min_bytes = min_words * BytesPerWord; |
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867 size_t preferred_bytes = preferred_words * BytesPerWord; |
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868 |
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869 size_t uncommitted = virtual_space()->reserved_size() - virtual_space()->actual_committed_size(); |
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870 |
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871 if (uncommitted < min_bytes) { |
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872 return false; |
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873 } |
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874 |
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875 size_t commit = MIN2(preferred_bytes, uncommitted); |
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876 bool result = virtual_space()->expand_by(commit, false); |
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877 |
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878 assert(result, "Failed to commit memory"); |
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879 |
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880 return result; |
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881 } |
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882 |
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883 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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884 assert_lock_strong(SpaceManager::expand_lock()); |
10175 | 885 Metachunk* result = take_from_committed(chunk_word_size); |
886 if (result != NULL) { | |
887 inc_container_count(); | |
888 } | |
889 return result; | |
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890 } |
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891 |
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892 bool VirtualSpaceNode::initialize() { |
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893 |
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894 if (!_rs.is_reserved()) { |
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895 return false; |
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896 } |
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897 |
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898 // These are necessary restriction to make sure that the virtual space always |
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899 // grows in steps of Metaspace::commit_alignment(). If both base and size are |
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900 // aligned only the middle alignment of the VirtualSpace is used. |
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901 assert_is_ptr_aligned(_rs.base(), Metaspace::commit_alignment()); |
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902 assert_is_size_aligned(_rs.size(), Metaspace::commit_alignment()); |
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903 |
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904 // ReservedSpaces marked as special will have the entire memory |
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905 // pre-committed. Setting a committed size will make sure that |
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906 // committed_size and actual_committed_size agrees. |
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907 size_t pre_committed_size = _rs.special() ? _rs.size() : 0; |
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908 |
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909 bool result = virtual_space()->initialize_with_granularity(_rs, pre_committed_size, |
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910 Metaspace::commit_alignment()); |
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911 if (result) { |
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912 assert(virtual_space()->committed_size() == virtual_space()->actual_committed_size(), |
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913 "Checking that the pre-committed memory was registered by the VirtualSpace"); |
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914 |
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915 set_top((MetaWord*)virtual_space()->low()); |
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916 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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917 (HeapWord*)(_rs.base() + _rs.size()))); |
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918 |
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919 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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920 err_msg("Reserved start was not set properly " PTR_FORMAT |
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921 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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922 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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923 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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924 " != " SIZE_FORMAT, reserved()->word_size(), |
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925 _rs.size() / BytesPerWord)); |
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926 } |
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927 |
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928 return result; |
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929 } |
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930 |
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931 void VirtualSpaceNode::print_on(outputStream* st) const { |
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932 size_t used = used_words_in_vs(); |
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933 size_t capacity = capacity_words_in_vs(); |
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934 VirtualSpace* vs = virtual_space(); |
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935 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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936 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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937 PTR_FORMAT ", " PTR_FORMAT ")", |
7446
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938 vs, capacity / K, |
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939 capacity == 0 ? 0 : used * 100 / capacity, |
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940 bottom(), top(), end(), |
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941 vs->high_boundary()); |
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942 } |
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943 |
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944 #ifdef ASSERT |
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945 void VirtualSpaceNode::mangle() { |
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946 size_t word_size = capacity_words_in_vs(); |
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947 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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948 } |
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949 #endif // ASSERT |
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950 |
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951 // VirtualSpaceList methods |
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952 // Space allocated from the VirtualSpace |
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953 |
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954 VirtualSpaceList::~VirtualSpaceList() { |
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955 VirtualSpaceListIterator iter(virtual_space_list()); |
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956 while (iter.repeat()) { |
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957 VirtualSpaceNode* vsl = iter.get_next(); |
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958 delete vsl; |
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959 } |
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960 } |
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961 |
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962 void VirtualSpaceList::inc_reserved_words(size_t v) { |
10175 | 963 assert_lock_strong(SpaceManager::expand_lock()); |
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964 _reserved_words = _reserved_words + v; |
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965 } |
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966 void VirtualSpaceList::dec_reserved_words(size_t v) { |
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967 assert_lock_strong(SpaceManager::expand_lock()); |
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968 _reserved_words = _reserved_words - v; |
10175 | 969 } |
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970 |
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971 #define assert_committed_below_limit() \ |
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972 assert(MetaspaceAux::committed_bytes() <= MaxMetaspaceSize, \ |
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973 err_msg("Too much committed memory. Committed: " SIZE_FORMAT \ |
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974 " limit (MaxMetaspaceSize): " SIZE_FORMAT, \ |
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975 MetaspaceAux::committed_bytes(), MaxMetaspaceSize)); |
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976 |
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977 void VirtualSpaceList::inc_committed_words(size_t v) { |
10175 | 978 assert_lock_strong(SpaceManager::expand_lock()); |
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979 _committed_words = _committed_words + v; |
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980 |
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981 assert_committed_below_limit(); |
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982 } |
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983 void VirtualSpaceList::dec_committed_words(size_t v) { |
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984 assert_lock_strong(SpaceManager::expand_lock()); |
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985 _committed_words = _committed_words - v; |
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986 |
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987 assert_committed_below_limit(); |
10175 | 988 } |
989 | |
990 void VirtualSpaceList::inc_virtual_space_count() { | |
991 assert_lock_strong(SpaceManager::expand_lock()); | |
992 _virtual_space_count++; | |
993 } | |
994 void VirtualSpaceList::dec_virtual_space_count() { | |
995 assert_lock_strong(SpaceManager::expand_lock()); | |
996 _virtual_space_count--; | |
997 } | |
998 | |
999 void ChunkManager::remove_chunk(Metachunk* chunk) { | |
1000 size_t word_size = chunk->word_size(); | |
1001 ChunkIndex index = list_index(word_size); | |
1002 if (index != HumongousIndex) { | |
1003 free_chunks(index)->remove_chunk(chunk); | |
1004 } else { | |
1005 humongous_dictionary()->remove_chunk(chunk); | |
1006 } | |
1007 | |
1008 // Chunk is being removed from the chunks free list. | |
12902 | 1009 dec_free_chunks_total(chunk->word_size()); |
10175 | 1010 } |
1011 | |
1012 // Walk the list of VirtualSpaceNodes and delete | |
1013 // nodes with a 0 container_count. Remove Metachunks in | |
1014 // the node from their respective freelists. | |
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1015 void VirtualSpaceList::purge(ChunkManager* chunk_manager) { |
10175 | 1016 assert_lock_strong(SpaceManager::expand_lock()); |
1017 // Don't use a VirtualSpaceListIterator because this | |
1018 // list is being changed and a straightforward use of an iterator is not safe. | |
1019 VirtualSpaceNode* purged_vsl = NULL; | |
1020 VirtualSpaceNode* prev_vsl = virtual_space_list(); | |
1021 VirtualSpaceNode* next_vsl = prev_vsl; | |
1022 while (next_vsl != NULL) { | |
1023 VirtualSpaceNode* vsl = next_vsl; | |
1024 next_vsl = vsl->next(); | |
1025 // Don't free the current virtual space since it will likely | |
1026 // be needed soon. | |
1027 if (vsl->container_count() == 0 && vsl != current_virtual_space()) { | |
1028 // Unlink it from the list | |
1029 if (prev_vsl == vsl) { | |
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1030 // This is the case of the current node being the first node. |
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1031 assert(vsl == virtual_space_list(), "Expected to be the first node"); |
10175 | 1032 set_virtual_space_list(vsl->next()); |
1033 } else { | |
1034 prev_vsl->set_next(vsl->next()); | |
1035 } | |
1036 | |
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1037 vsl->purge(chunk_manager); |
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1038 dec_reserved_words(vsl->reserved_words()); |
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1039 dec_committed_words(vsl->committed_words()); |
10175 | 1040 dec_virtual_space_count(); |
1041 purged_vsl = vsl; | |
1042 delete vsl; | |
1043 } else { | |
1044 prev_vsl = vsl; | |
1045 } | |
1046 } | |
1047 #ifdef ASSERT | |
1048 if (purged_vsl != NULL) { | |
1049 // List should be stable enough to use an iterator here. | |
1050 VirtualSpaceListIterator iter(virtual_space_list()); | |
1051 while (iter.repeat()) { | |
1052 VirtualSpaceNode* vsl = iter.get_next(); | |
1053 assert(vsl != purged_vsl, "Purge of vsl failed"); | |
1054 } | |
1055 } | |
1056 #endif | |
1057 } | |
1058 | |
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1059 VirtualSpaceList::VirtualSpaceList(size_t word_size) : |
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1060 _is_class(false), |
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1061 _virtual_space_list(NULL), |
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1062 _current_virtual_space(NULL), |
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1063 _reserved_words(0), |
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1064 _committed_words(0), |
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1065 _virtual_space_count(0) { |
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1066 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1067 Mutex::_no_safepoint_check_flag); |
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1068 create_new_virtual_space(word_size); |
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1069 } |
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1070 |
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1071 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1072 _is_class(true), |
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1073 _virtual_space_list(NULL), |
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1074 _current_virtual_space(NULL), |
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1075 _reserved_words(0), |
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1076 _committed_words(0), |
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1077 _virtual_space_count(0) { |
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1078 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1079 Mutex::_no_safepoint_check_flag); |
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1080 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1081 bool succeeded = class_entry->initialize(); |
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1082 if (succeeded) { |
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1083 link_vs(class_entry); |
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1084 } |
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1085 } |
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1086 |
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1087 size_t VirtualSpaceList::free_bytes() { |
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1088 return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
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1089 } |
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1090 |
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1091 // Allocate another meta virtual space and add it to the list. |
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1092 bool VirtualSpaceList::create_new_virtual_space(size_t vs_word_size) { |
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1093 assert_lock_strong(SpaceManager::expand_lock()); |
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1094 |
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1095 if (is_class()) { |
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1096 assert(false, "We currently don't support more than one VirtualSpace for" |
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1097 " the compressed class space. The initialization of the" |
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1098 " CCS uses another code path and should not hit this path."); |
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1099 return false; |
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1100 } |
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1101 |
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1102 if (vs_word_size == 0) { |
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1103 assert(false, "vs_word_size should always be at least _reserve_alignment large."); |
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1104 return false; |
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1105 } |
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1106 |
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1107 // Reserve the space |
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1108 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1109 assert_is_size_aligned(vs_byte_size, Metaspace::reserve_alignment()); |
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1110 |
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1111 // Allocate the meta virtual space and initialize it. |
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1112 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1113 if (!new_entry->initialize()) { |
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1114 delete new_entry; |
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1115 return false; |
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1116 } else { |
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1117 assert(new_entry->reserved_words() == vs_word_size, |
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1118 "Reserved memory size differs from requested memory size"); |
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1119 // ensure lock-free iteration sees fully initialized node |
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1120 OrderAccess::storestore(); |
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1121 link_vs(new_entry); |
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1122 return true; |
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1123 } |
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1124 } |
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1125 |
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1126 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
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1127 if (virtual_space_list() == NULL) { |
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1128 set_virtual_space_list(new_entry); |
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1129 } else { |
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1130 current_virtual_space()->set_next(new_entry); |
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1131 } |
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1132 set_current_virtual_space(new_entry); |
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1133 inc_reserved_words(new_entry->reserved_words()); |
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1134 inc_committed_words(new_entry->committed_words()); |
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1135 inc_virtual_space_count(); |
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1136 #ifdef ASSERT |
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1137 new_entry->mangle(); |
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1138 #endif |
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1139 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1140 VirtualSpaceNode* vsl = current_virtual_space(); |
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1141 vsl->print_on(gclog_or_tty); |
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1142 } |
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1143 } |
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1144 |
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1145 bool VirtualSpaceList::expand_node_by(VirtualSpaceNode* node, |
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1146 size_t min_words, |
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1147 size_t preferred_words) { |
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1148 size_t before = node->committed_words(); |
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1149 |
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1150 bool result = node->expand_by(min_words, preferred_words); |
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1151 |
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1152 size_t after = node->committed_words(); |
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1153 |
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1154 // after and before can be the same if the memory was pre-committed. |
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1155 assert(after >= before, "Inconsistency"); |
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1156 inc_committed_words(after - before); |
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1157 |
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1158 return result; |
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1159 } |
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1160 |
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1161 bool VirtualSpaceList::expand_by(size_t min_words, size_t preferred_words) { |
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1162 assert_is_size_aligned(min_words, Metaspace::commit_alignment_words()); |
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1163 assert_is_size_aligned(preferred_words, Metaspace::commit_alignment_words()); |
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1164 assert(min_words <= preferred_words, "Invalid arguments"); |
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1165 |
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1166 if (!MetaspaceGC::can_expand(min_words, this->is_class())) { |
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1167 return false; |
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1168 } |
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1169 |
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1170 size_t allowed_expansion_words = MetaspaceGC::allowed_expansion(); |
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1171 if (allowed_expansion_words < min_words) { |
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1172 return false; |
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1173 } |
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1174 |
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1175 size_t max_expansion_words = MIN2(preferred_words, allowed_expansion_words); |
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1176 |
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1177 // Commit more memory from the the current virtual space. |
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1178 bool vs_expanded = expand_node_by(current_virtual_space(), |
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1179 min_words, |
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1180 max_expansion_words); |
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1181 if (vs_expanded) { |
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1182 return true; |
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1183 } |
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1184 |
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1185 // Get another virtual space. |
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1186 size_t grow_vs_words = MAX2((size_t)VirtualSpaceSize, preferred_words); |
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1187 grow_vs_words = align_size_up(grow_vs_words, Metaspace::reserve_alignment_words()); |
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1188 |
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1189 if (create_new_virtual_space(grow_vs_words)) { |
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1190 if (current_virtual_space()->is_pre_committed()) { |
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1191 // The memory was pre-committed, so we are done here. |
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1192 assert(min_words <= current_virtual_space()->committed_words(), |
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1193 "The new VirtualSpace was pre-committed, so it" |
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1194 "should be large enough to fit the alloc request."); |
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1195 return true; |
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1196 } |
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1197 |
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1198 return expand_node_by(current_virtual_space(), |
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1199 min_words, |
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1200 max_expansion_words); |
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1201 } |
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1202 |
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1203 return false; |
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1204 } |
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1205 |
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1206 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1207 size_t grow_chunks_by_words, |
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1208 size_t medium_chunk_bunch) { |
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1209 |
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1210 // Allocate a chunk out of the current virtual space. |
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1211 Metachunk* next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1212 |
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1213 if (next != NULL) { |
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1214 return next; |
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1215 } |
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1216 |
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1217 // The expand amount is currently only determined by the requested sizes |
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1218 // and not how much committed memory is left in the current virtual space. |
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1219 |
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1220 size_t min_word_size = align_size_up(grow_chunks_by_words, Metaspace::commit_alignment_words()); |
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1221 size_t preferred_word_size = align_size_up(medium_chunk_bunch, Metaspace::commit_alignment_words()); |
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1222 if (min_word_size >= preferred_word_size) { |
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1223 // Can happen when humongous chunks are allocated. |
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1224 preferred_word_size = min_word_size; |
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1225 } |
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1226 |
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1227 bool expanded = expand_by(min_word_size, preferred_word_size); |
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1228 if (expanded) { |
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1229 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1230 assert(next != NULL, "The allocation was expected to succeed after the expansion"); |
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1231 } |
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1232 |
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1233 return next; |
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1234 } |
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1235 |
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1236 void VirtualSpaceList::print_on(outputStream* st) const { |
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1237 if (TraceMetadataChunkAllocation && Verbose) { |
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1238 VirtualSpaceListIterator iter(virtual_space_list()); |
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1239 while (iter.repeat()) { |
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1240 VirtualSpaceNode* node = iter.get_next(); |
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1241 node->print_on(st); |
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1242 } |
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1243 } |
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1244 } |
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1245 |
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1246 bool VirtualSpaceList::contains(const void *ptr) { |
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1247 VirtualSpaceNode* list = virtual_space_list(); |
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1248 VirtualSpaceListIterator iter(list); |
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1249 while (iter.repeat()) { |
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1250 VirtualSpaceNode* node = iter.get_next(); |
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1251 if (node->reserved()->contains(ptr)) { |
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1252 return true; |
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1253 } |
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1254 } |
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1255 return false; |
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1256 } |
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1257 |
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1258 |
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1259 // MetaspaceGC methods |
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1260 |
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1261 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1262 // Within the VM operation after the GC the attempt to allocate the metadata |
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1263 // should succeed. If the GC did not free enough space for the metaspace |
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1264 // allocation, the HWM is increased so that another virtualspace will be |
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1265 // allocated for the metadata. With perm gen the increase in the perm |
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1266 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1267 // metaspace policy uses those as the small and large steps for the HWM. |
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1268 // |
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1269 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1270 // resize the capacity of the metaspaces. The current implementation |
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1271 // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
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1272 // to resize the Java heap by some GC's. New flags can be implemented |
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1273 // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
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1274 // free space is desirable in the metaspace capacity to decide how much |
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1275 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
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1276 // free space is desirable in the metaspace capacity before decreasing |
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1277 // the HWM. |
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1278 |
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1279 // Calculate the amount to increase the high water mark (HWM). |
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1280 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1281 // another expansion is not requested too soon. If that is not |
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1282 // enough to satisfy the allocation, increase by MaxMetaspaceExpansion. |
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1283 // If that is still not enough, expand by the size of the allocation |
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1284 // plus some. |
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1285 size_t MetaspaceGC::delta_capacity_until_GC(size_t bytes) { |
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1286 size_t min_delta = MinMetaspaceExpansion; |
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1287 size_t max_delta = MaxMetaspaceExpansion; |
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1288 size_t delta = align_size_up(bytes, Metaspace::commit_alignment()); |
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1289 |
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1290 if (delta <= min_delta) { |
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1291 delta = min_delta; |
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1292 } else if (delta <= max_delta) { |
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1293 // Don't want to hit the high water mark on the next |
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1294 // allocation so make the delta greater than just enough |
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1295 // for this allocation. |
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1296 delta = max_delta; |
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1297 } else { |
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1298 // This allocation is large but the next ones are probably not |
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1299 // so increase by the minimum. |
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1300 delta = delta + min_delta; |
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1301 } |
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1302 |
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1303 assert_is_size_aligned(delta, Metaspace::commit_alignment()); |
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1304 |
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1305 return delta; |
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1306 } |
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1307 |
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1308 size_t MetaspaceGC::capacity_until_GC() { |
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1309 size_t value = (size_t)OrderAccess::load_ptr_acquire(&_capacity_until_GC); |
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1310 assert(value >= MetaspaceSize, "Not initialied properly?"); |
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1311 return value; |
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1312 } |
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1313 |
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1314 size_t MetaspaceGC::inc_capacity_until_GC(size_t v) { |
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1315 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1316 |
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1317 return (size_t)Atomic::add_ptr(v, &_capacity_until_GC); |
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1318 } |
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1319 |
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1320 size_t MetaspaceGC::dec_capacity_until_GC(size_t v) { |
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1321 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1322 |
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1323 return (size_t)Atomic::add_ptr(-(intptr_t)v, &_capacity_until_GC); |
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1324 } |
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1325 |
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1326 bool MetaspaceGC::can_expand(size_t word_size, bool is_class) { |
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1327 // Check if the compressed class space is full. |
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1328 if (is_class && Metaspace::using_class_space()) { |
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1329 size_t class_committed = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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1330 if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) { |
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1331 return false; |
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1332 } |
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1333 } |
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1334 |
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1335 // Check if the user has imposed a limit on the metaspace memory. |
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1336 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1337 if (committed_bytes + word_size * BytesPerWord > MaxMetaspaceSize) { |
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1338 return false; |
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1339 } |
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1340 |
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1341 return true; |
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1342 } |
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1343 |
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1344 size_t MetaspaceGC::allowed_expansion() { |
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1345 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1346 |
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1347 size_t left_until_max = MaxMetaspaceSize - committed_bytes; |
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1348 |
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1349 // Always grant expansion if we are initiating the JVM, |
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1350 // or if the GC_locker is preventing GCs. |
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1351 if (!is_init_completed() || GC_locker::is_active_and_needs_gc()) { |
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1352 return left_until_max / BytesPerWord; |
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1353 } |
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1354 |
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1355 size_t capacity_until_gc = capacity_until_GC(); |
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1356 |
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1357 if (capacity_until_gc <= committed_bytes) { |
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1358 return 0; |
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1359 } |
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1360 |
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1361 size_t left_until_GC = capacity_until_gc - committed_bytes; |
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1362 size_t left_to_commit = MIN2(left_until_GC, left_until_max); |
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1363 |
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1364 return left_to_commit / BytesPerWord; |
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1365 } |
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1366 |
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1367 void MetaspaceGC::compute_new_size() { |
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1368 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1369 uint current_shrink_factor = _shrink_factor; |
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1370 _shrink_factor = 0; |
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1371 |
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1372 const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
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1373 const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
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1374 |
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1375 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1376 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1377 |
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1378 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1379 size_t minimum_desired_capacity = |
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1380 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1381 // Don't shrink less than the initial generation size |
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1382 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1383 MetaspaceSize); |
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1384 |
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1385 if (PrintGCDetails && Verbose) { |
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1386 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1387 gclog_or_tty->print_cr(" " |
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1388 " minimum_free_percentage: %6.2f" |
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1389 " maximum_used_percentage: %6.2f", |
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1390 minimum_free_percentage, |
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1391 maximum_used_percentage); |
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1392 gclog_or_tty->print_cr(" " |
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1393 " used_after_gc : %6.1fKB", |
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1394 used_after_gc / (double) K); |
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1395 } |
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1396 |
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1397 |
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1398 size_t shrink_bytes = 0; |
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1399 if (capacity_until_GC < minimum_desired_capacity) { |
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1400 // If we have less capacity below the metaspace HWM, then |
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1401 // increment the HWM. |
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1402 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1403 expand_bytes = align_size_up(expand_bytes, Metaspace::commit_alignment()); |
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1404 // Don't expand unless it's significant |
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1405 if (expand_bytes >= MinMetaspaceExpansion) { |
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1406 MetaspaceGC::inc_capacity_until_GC(expand_bytes); |
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1407 } |
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1408 if (PrintGCDetails && Verbose) { |
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1409 size_t new_capacity_until_GC = capacity_until_GC; |
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1410 gclog_or_tty->print_cr(" expanding:" |
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1411 " minimum_desired_capacity: %6.1fKB" |
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1412 " expand_bytes: %6.1fKB" |
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1413 " MinMetaspaceExpansion: %6.1fKB" |
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1414 " new metaspace HWM: %6.1fKB", |
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1415 minimum_desired_capacity / (double) K, |
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1416 expand_bytes / (double) K, |
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1417 MinMetaspaceExpansion / (double) K, |
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1418 new_capacity_until_GC / (double) K); |
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1419 } |
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1420 return; |
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1421 } |
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1422 |
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1423 // No expansion, now see if we want to shrink |
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1424 // We would never want to shrink more than this |
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1425 size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
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1426 assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
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1427 max_shrink_bytes)); |
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1428 |
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1429 // Should shrinking be considered? |
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1430 if (MaxMetaspaceFreeRatio < 100) { |
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1431 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1432 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1433 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1434 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1435 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1436 MetaspaceSize); |
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1437 if (PrintGCDetails && Verbose) { |
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1438 gclog_or_tty->print_cr(" " |
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1439 " maximum_free_percentage: %6.2f" |
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1440 " minimum_used_percentage: %6.2f", |
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1441 maximum_free_percentage, |
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1442 minimum_used_percentage); |
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1443 gclog_or_tty->print_cr(" " |
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1444 " minimum_desired_capacity: %6.1fKB" |
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1445 " maximum_desired_capacity: %6.1fKB", |
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1446 minimum_desired_capacity / (double) K, |
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1447 maximum_desired_capacity / (double) K); |
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1448 } |
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1449 |
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1450 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1451 "sanity check"); |
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1452 |
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1453 if (capacity_until_GC > maximum_desired_capacity) { |
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1454 // Capacity too large, compute shrinking size |
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1455 shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
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1456 // We don't want shrink all the way back to initSize if people call |
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1457 // System.gc(), because some programs do that between "phases" and then |
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1458 // we'd just have to grow the heap up again for the next phase. So we |
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1459 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1460 // on the third call, and 100% by the fourth call. But if we recompute |
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1461 // size without shrinking, it goes back to 0%. |
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1462 shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
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1463 |
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1464 shrink_bytes = align_size_down(shrink_bytes, Metaspace::commit_alignment()); |
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1465 |
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1466 assert(shrink_bytes <= max_shrink_bytes, |
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1467 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1468 shrink_bytes, max_shrink_bytes)); |
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1469 if (current_shrink_factor == 0) { |
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1470 _shrink_factor = 10; |
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1471 } else { |
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1472 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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1473 } |
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1474 if (PrintGCDetails && Verbose) { |
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1475 gclog_or_tty->print_cr(" " |
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1476 " shrinking:" |
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1477 " initSize: %.1fK" |
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1478 " maximum_desired_capacity: %.1fK", |
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1479 MetaspaceSize / (double) K, |
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1480 maximum_desired_capacity / (double) K); |
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1481 gclog_or_tty->print_cr(" " |
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1482 " shrink_bytes: %.1fK" |
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1483 " current_shrink_factor: %d" |
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1484 " new shrink factor: %d" |
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1485 " MinMetaspaceExpansion: %.1fK", |
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1486 shrink_bytes / (double) K, |
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1487 current_shrink_factor, |
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1488 _shrink_factor, |
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1489 MinMetaspaceExpansion / (double) K); |
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1490 } |
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1491 } |
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1492 } |
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1493 |
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1494 // Don't shrink unless it's significant |
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1495 if (shrink_bytes >= MinMetaspaceExpansion && |
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1496 ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
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1497 MetaspaceGC::dec_capacity_until_GC(shrink_bytes); |
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1498 } |
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1499 } |
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1500 |
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1501 // Metadebug methods |
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1502 |
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1503 void Metadebug::init_allocation_fail_alot_count() { |
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1504 if (MetadataAllocationFailALot) { |
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1505 _allocation_fail_alot_count = |
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1506 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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1507 } |
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1508 } |
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1509 |
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1510 #ifdef ASSERT |
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1511 bool Metadebug::test_metadata_failure() { |
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1512 if (MetadataAllocationFailALot && |
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1513 Threads::is_vm_complete()) { |
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1514 if (_allocation_fail_alot_count > 0) { |
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1515 _allocation_fail_alot_count--; |
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1516 } else { |
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1517 if (TraceMetadataChunkAllocation && Verbose) { |
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1518 gclog_or_tty->print_cr("Metadata allocation failing for " |
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1519 "MetadataAllocationFailALot"); |
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1520 } |
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1521 init_allocation_fail_alot_count(); |
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1522 return true; |
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1523 } |
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1524 } |
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1525 return false; |
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1526 } |
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1527 #endif |
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|
1528 |
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1529 // ChunkManager methods |
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1530 |
12235 | 1531 size_t ChunkManager::free_chunks_total_words() { |
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1532 return _free_chunks_total; |
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1533 } |
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1534 |
12235 | 1535 size_t ChunkManager::free_chunks_total_bytes() { |
1536 return free_chunks_total_words() * BytesPerWord; | |
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1537 } |
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1538 |
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1539 size_t ChunkManager::free_chunks_count() { |
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1540 #ifdef ASSERT |
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1541 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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1542 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1543 Mutex::_no_safepoint_check_flag); |
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1544 // This lock is only needed in debug because the verification |
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1545 // of the _free_chunks_totals walks the list of free chunks |
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1546 slow_locked_verify_free_chunks_count(); |
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1547 } |
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1548 #endif |
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1549 return _free_chunks_count; |
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1550 } |
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1551 |
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1552 void ChunkManager::locked_verify_free_chunks_total() { |
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1553 assert_lock_strong(SpaceManager::expand_lock()); |
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1554 assert(sum_free_chunks() == _free_chunks_total, |
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1555 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
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1556 " same as sum " SIZE_FORMAT, _free_chunks_total, |
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1557 sum_free_chunks())); |
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1558 } |
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1559 |
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1560 void ChunkManager::verify_free_chunks_total() { |
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1561 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1562 Mutex::_no_safepoint_check_flag); |
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1563 locked_verify_free_chunks_total(); |
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1564 } |
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1565 |
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1566 void ChunkManager::locked_verify_free_chunks_count() { |
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1567 assert_lock_strong(SpaceManager::expand_lock()); |
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1568 assert(sum_free_chunks_count() == _free_chunks_count, |
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1569 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
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1570 " same as sum " SIZE_FORMAT, _free_chunks_count, |
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1571 sum_free_chunks_count())); |
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1572 } |
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1573 |
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1574 void ChunkManager::verify_free_chunks_count() { |
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1575 #ifdef ASSERT |
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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 locked_verify_free_chunks_count(); |
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1579 #endif |
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1580 } |
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1581 |
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1582 void ChunkManager::verify() { |
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1583 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1584 Mutex::_no_safepoint_check_flag); |
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1585 locked_verify(); |
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1586 } |
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1587 |
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1588 void ChunkManager::locked_verify() { |
6885 | 1589 locked_verify_free_chunks_count(); |
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1590 locked_verify_free_chunks_total(); |
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1591 } |
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1592 |
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1593 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
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1594 assert_lock_strong(SpaceManager::expand_lock()); |
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1595 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1596 _free_chunks_total, _free_chunks_count); |
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1597 } |
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1598 |
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1599 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
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1600 assert_lock_strong(SpaceManager::expand_lock()); |
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1601 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
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1602 sum_free_chunks(), sum_free_chunks_count()); |
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1603 } |
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1604 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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1605 return &_free_chunks[index]; |
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1606 } |
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1607 |
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1608 // These methods that sum the free chunk lists are used in printing |
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1609 // methods that are used in product builds. |
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1610 size_t ChunkManager::sum_free_chunks() { |
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1611 assert_lock_strong(SpaceManager::expand_lock()); |
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1612 size_t result = 0; |
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1613 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1614 ChunkList* list = free_chunks(i); |
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1615 |
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1616 if (list == NULL) { |
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1617 continue; |
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|
1618 } |
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1619 |
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1620 result = result + list->count() * list->size(); |
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1621 } |
6885 | 1622 result = result + humongous_dictionary()->total_size(); |
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1623 return result; |
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|
1624 } |
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1625 |
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1626 size_t ChunkManager::sum_free_chunks_count() { |
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1627 assert_lock_strong(SpaceManager::expand_lock()); |
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1628 size_t count = 0; |
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1629 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1630 ChunkList* list = free_chunks(i); |
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1631 if (list == NULL) { |
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1632 continue; |
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1633 } |
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1634 count = count + list->count(); |
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1635 } |
6885 | 1636 count = count + humongous_dictionary()->total_free_blocks(); |
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1637 return count; |
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|
1638 } |
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1639 |
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1640 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1641 ChunkIndex index = list_index(word_size); |
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1642 assert(index < HumongousIndex, "No humongous list"); |
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1643 return free_chunks(index); |
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|
1644 } |
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1645 |
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1646 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1647 assert_lock_strong(SpaceManager::expand_lock()); |
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1648 |
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|
1649 slow_locked_verify(); |
6885 | 1650 |
1651 Metachunk* chunk = NULL; | |
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1652 if (list_index(word_size) != HumongousIndex) { |
6885 | 1653 ChunkList* free_list = find_free_chunks_list(word_size); |
1654 assert(free_list != NULL, "Sanity check"); | |
1655 | |
1656 chunk = free_list->head(); | |
1657 | |
1658 if (chunk == NULL) { | |
1659 return NULL; | |
1660 } | |
1661 | |
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1662 // Remove the chunk as the head of the list. |
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1663 free_list->remove_chunk(chunk); |
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1664 |
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1665 if (TraceMetadataChunkAllocation && Verbose) { |
12240
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|
1666 gclog_or_tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1667 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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|
1668 free_list, chunk, chunk->word_size()); |
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|
1669 } |
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|
1670 } else { |
6885 | 1671 chunk = humongous_dictionary()->get_chunk( |
1672 word_size, | |
1673 FreeBlockDictionary<Metachunk>::atLeast); | |
1674 | |
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|
1675 if (chunk == NULL) { |
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1676 return NULL; |
6885 | 1677 } |
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|
1678 |
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1679 if (TraceMetadataHumongousAllocation) { |
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1680 size_t waste = chunk->word_size() - word_size; |
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1681 gclog_or_tty->print_cr("Free list allocate humongous chunk size " |
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1682 SIZE_FORMAT " for requested size " SIZE_FORMAT |
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1683 " waste " SIZE_FORMAT, |
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1684 chunk->word_size(), word_size, waste); |
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1685 } |
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1686 } |
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1687 |
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1688 // Chunk is being removed from the chunks free list. |
12902 | 1689 dec_free_chunks_total(chunk->word_size()); |
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1690 |
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1691 // Remove it from the links to this freelist |
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1692 chunk->set_next(NULL); |
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1693 chunk->set_prev(NULL); |
10175 | 1694 #ifdef ASSERT |
1695 // Chunk is no longer on any freelist. Setting to false make container_count_slow() | |
1696 // work. | |
12902 | 1697 chunk->set_is_tagged_free(false); |
10175 | 1698 #endif |
12303
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|
1699 chunk->container()->inc_container_count(); |
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|
1700 |
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1701 slow_locked_verify(); |
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1702 return chunk; |
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1703 } |
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1704 |
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1705 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1706 assert_lock_strong(SpaceManager::expand_lock()); |
6969
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7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
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|
1707 slow_locked_verify(); |
6725
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1708 |
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1709 // Take from the beginning of the list |
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1710 Metachunk* chunk = free_chunks_get(word_size); |
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1711 if (chunk == NULL) { |
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1712 return NULL; |
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|
1713 } |
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1714 |
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1715 assert((word_size <= chunk->word_size()) || |
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1716 list_index(chunk->word_size() == HumongousIndex), |
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1717 "Non-humongous variable sized chunk"); |
6725
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1718 if (TraceMetadataChunkAllocation) { |
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1719 size_t list_count; |
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1720 if (list_index(word_size) < HumongousIndex) { |
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|
1721 ChunkList* list = find_free_chunks_list(word_size); |
10101
df254344edf1
8011173: NPG: Replace the ChunkList implementation with class FreeList<Metachunk>
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|
1722 list_count = list->count(); |
7446
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1723 } else { |
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1724 list_count = humongous_dictionary()->total_count(); |
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1725 } |
12240
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|
1726 gclog_or_tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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|
1727 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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|
1728 this, chunk, chunk->word_size(), list_count); |
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|
1729 locked_print_free_chunks(gclog_or_tty); |
6725
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|
1730 } |
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|
1731 |
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|
1732 return chunk; |
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|
1733 } |
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|
1734 |
12303
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8025096: Move the ChunkManager instances out of the VirtualSpaceLists
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12302
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|
1735 void ChunkManager::print_on(outputStream* out) const { |
6885 | 1736 if (PrintFLSStatistics != 0) { |
12303
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|
1737 const_cast<ChunkManager *>(this)->humongous_dictionary()->report_statistics(); |
6885 | 1738 } |
1739 } | |
1740 | |
6725
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|
1741 // SpaceManager methods |
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1742 |
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|
1743 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1744 size_t* chunk_word_size, |
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1745 size_t* class_chunk_word_size) { |
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|
1746 switch (type) { |
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|
1747 case Metaspace::BootMetaspaceType: |
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|
1748 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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|
1749 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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|
1750 break; |
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|
1751 case Metaspace::ROMetaspaceType: |
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|
1752 *chunk_word_size = SharedReadOnlySize / wordSize; |
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|
1753 *class_chunk_word_size = ClassSpecializedChunk; |
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|
1754 break; |
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|
1755 case Metaspace::ReadWriteMetaspaceType: |
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|
1756 *chunk_word_size = SharedReadWriteSize / wordSize; |
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|
1757 *class_chunk_word_size = ClassSpecializedChunk; |
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|
1758 break; |
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|
1759 case Metaspace::AnonymousMetaspaceType: |
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1760 case Metaspace::ReflectionMetaspaceType: |
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|
1761 *chunk_word_size = SpecializedChunk; |
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|
1762 *class_chunk_word_size = ClassSpecializedChunk; |
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|
1763 break; |
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|
1764 default: |
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|
1765 *chunk_word_size = SmallChunk; |
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|
1766 *class_chunk_word_size = ClassSmallChunk; |
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|
1767 break; |
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|
1768 } |
8007
d9058e388631
8007257: NPG: metaspace.cpp: Incorrect arguments in calls to err_msg
mikael
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7447
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|
1769 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
7446
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|
1770 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
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|
1771 " class " SIZE_FORMAT, |
8007
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|
1772 *chunk_word_size, *class_chunk_word_size)); |
7446
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|
1773 } |
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|
1774 |
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|
1775 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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|
1776 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
1777 size_t free = 0; |
7446
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1778 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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|
1779 Metachunk* chunk = chunks_in_use(i); |
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|
1780 while (chunk != NULL) { |
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|
1781 free += chunk->free_word_size(); |
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|
1782 chunk = chunk->next(); |
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|
1783 } |
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|
1784 } |
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|
1785 return free; |
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|
1786 } |
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|
1787 |
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|
1788 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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|
1789 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
1790 size_t result = 0; |
7446
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1791 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
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|
1792 result += sum_waste_in_chunks_in_use(i); |
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|
1793 } |
6885 | 1794 |
6725
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|
1795 return result; |
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diff
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|
1796 } |
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|
1797 |
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|
1798 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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|
1799 size_t result = 0; |
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|
1800 Metachunk* chunk = chunks_in_use(index); |
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|
1801 // Count the free space in all the chunk but not the |
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|
1802 // current chunk from which allocations are still being done. |
11064
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|
1803 while (chunk != NULL) { |
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|
1804 if (chunk != current_chunk()) { |
6885 | 1805 result += chunk->free_word_size(); |
6725
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|
1806 } |
11064
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|
1807 chunk = chunk->next(); |
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|
1808 } |
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|
1809 return result; |
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|
1810 } |
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|
1811 |
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|
1812 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
10183
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|
1813 // For CMS use "allocated_chunks_words()" which does not need the |
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|
1814 // Metaspace lock. For the other collectors sum over the |
868d87ed63c8
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|
1815 // lists. Use both methods as a check that "allocated_chunks_words()" |
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|
1816 // is correct. That is, sum_capacity_in_chunks() is too expensive |
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|
1817 // to use in the product and allocated_chunks_words() should be used |
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|
1818 // but allow for checking that allocated_chunks_words() returns the same |
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|
1819 // value as sum_capacity_in_chunks_in_use() which is the definitive |
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|
1820 // answer. |
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|
1821 if (UseConcMarkSweepGC) { |
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|
1822 return allocated_chunks_words(); |
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|
1823 } else { |
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|
1824 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
1825 size_t sum = 0; |
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|
1826 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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|
1827 Metachunk* chunk = chunks_in_use(i); |
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|
1828 while (chunk != NULL) { |
12902 | 1829 sum += chunk->word_size(); |
10183
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1830 chunk = chunk->next(); |
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1831 } |
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1832 } |
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1833 return sum; |
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1834 } |
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1835 } |
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1836 |
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1837 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1838 size_t count = 0; |
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1839 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1840 count = count + sum_count_in_chunks_in_use(i); |
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1841 } |
6885 | 1842 |
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1843 return count; |
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1844 } |
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1845 |
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1846 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1847 size_t count = 0; |
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1848 Metachunk* chunk = chunks_in_use(i); |
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1849 while (chunk != NULL) { |
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1850 count++; |
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1851 chunk = chunk->next(); |
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1852 } |
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1853 return count; |
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1854 } |
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1855 |
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1856 |
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1857 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1858 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1859 size_t used = 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) { |
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1863 used += chunk->used_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 used; |
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1868 } |
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1869 |
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1870 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1871 |
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1872 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1873 Metachunk* chunk = chunks_in_use(i); |
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1874 st->print("SpaceManager: %s " PTR_FORMAT, |
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1875 chunk_size_name(i), chunk); |
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1876 if (chunk != NULL) { |
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1877 st->print_cr(" free " SIZE_FORMAT, |
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1878 chunk->free_word_size()); |
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1879 } else { |
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1880 st->print_cr(""); |
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1881 } |
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1882 } |
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1883 |
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1884 chunk_manager()->locked_print_free_chunks(st); |
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1885 chunk_manager()->locked_print_sum_free_chunks(st); |
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1886 } |
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1887 |
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1888 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1889 |
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1890 // Decide between a small chunk and a medium chunk. Up to |
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1891 // _small_chunk_limit small chunks can be allocated but |
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1892 // once a medium chunk has been allocated, no more small |
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1893 // chunks will be allocated. |
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1894 size_t chunk_word_size; |
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1895 if (chunks_in_use(MediumIndex) == NULL && |
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1896 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
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1897 chunk_word_size = (size_t) small_chunk_size(); |
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1898 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
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1899 chunk_word_size = medium_chunk_size(); |
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1900 } |
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1901 } else { |
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1902 chunk_word_size = medium_chunk_size(); |
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1903 } |
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1904 |
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1905 // Might still need a humongous chunk. Enforce an |
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1906 // eight word granularity to facilitate reuse (some |
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1907 // wastage but better chance of reuse). |
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1908 size_t if_humongous_sized_chunk = |
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1909 align_size_up(word_size + Metachunk::overhead(), |
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1910 HumongousChunkGranularity); |
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1911 chunk_word_size = |
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1912 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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1913 |
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1914 assert(!SpaceManager::is_humongous(word_size) || |
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1915 chunk_word_size == if_humongous_sized_chunk, |
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1916 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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1917 " chunk_word_size " SIZE_FORMAT, |
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1918 word_size, chunk_word_size)); |
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1919 if (TraceMetadataHumongousAllocation && |
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1920 SpaceManager::is_humongous(word_size)) { |
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1921 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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1922 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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1923 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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1924 chunk_word_size); |
6885 | 1925 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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1926 Metachunk::overhead()); |
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1927 } |
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1928 return chunk_word_size; |
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1929 } |
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1930 |
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1931 void SpaceManager::track_metaspace_memory_usage() { |
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1932 if (is_init_completed()) { |
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1933 if (is_class()) { |
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1934 MemoryService::track_compressed_class_memory_usage(); |
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1935 } |
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1936 MemoryService::track_metaspace_memory_usage(); |
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1937 } |
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1938 } |
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1939 |
6885 | 1940 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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1941 assert(vs_list()->current_virtual_space() != NULL, |
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1942 "Should have been set"); |
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1943 assert(current_chunk() == NULL || |
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1944 current_chunk()->allocate(word_size) == NULL, |
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1945 "Don't need to expand"); |
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1946 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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1947 |
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1948 if (TraceMetadataChunkAllocation && Verbose) { |
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1949 size_t words_left = 0; |
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1950 size_t words_used = 0; |
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1951 if (current_chunk() != NULL) { |
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1952 words_left = current_chunk()->free_word_size(); |
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1953 words_used = current_chunk()->used_word_size(); |
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1954 } |
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1955 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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1956 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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1957 " words left", |
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1958 word_size, words_used, words_left); |
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1959 } |
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1960 |
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1961 // Get another chunk out of the virtual space |
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1962 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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1963 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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1964 |
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1965 MetaWord* mem = NULL; |
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1966 |
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1967 // If a chunk was available, add it to the in-use chunk list |
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1968 // and do an allocation from it. |
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1969 if (next != NULL) { |
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1970 // Add to this manager's list of chunks in use. |
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1971 add_chunk(next, false); |
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1972 mem = next->allocate(word_size); |
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1973 } |
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1974 |
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1975 // Track metaspace memory usage statistic. |
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1976 track_metaspace_memory_usage(); |
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1977 |
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1978 return mem; |
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1979 } |
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1980 |
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1981 void SpaceManager::print_on(outputStream* st) const { |
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1982 |
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1983 for (ChunkIndex i = ZeroIndex; |
6885 | 1984 i < NumberOfInUseLists ; |
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1985 i = next_chunk_index(i) ) { |
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1986 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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1987 chunks_in_use(i), |
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1988 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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1989 } |
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1990 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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1991 " Humongous " SIZE_FORMAT, |
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1992 sum_waste_in_chunks_in_use(SmallIndex), |
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1993 sum_waste_in_chunks_in_use(MediumIndex), |
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1994 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 1995 // block free lists |
1996 if (block_freelists() != NULL) { | |
1997 st->print_cr("total in block free lists " SIZE_FORMAT, | |
1998 block_freelists()->total_size()); | |
1999 } | |
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2000 } |
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2001 |
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2002 SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
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2003 Mutex* lock) : |
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2004 _mdtype(mdtype), |
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2005 _allocated_blocks_words(0), |
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2006 _allocated_chunks_words(0), |
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2007 _allocated_chunks_count(0), |
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2008 _lock(lock) |
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2009 { |
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2010 initialize(); |
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2011 } |
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2012 |
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2013 void SpaceManager::inc_size_metrics(size_t words) { |
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2014 assert_lock_strong(SpaceManager::expand_lock()); |
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2015 // Total of allocated Metachunks and allocated Metachunks count |
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2016 // for each SpaceManager |
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2017 _allocated_chunks_words = _allocated_chunks_words + words; |
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2018 _allocated_chunks_count++; |
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2019 // Global total of capacity in allocated Metachunks |
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2020 MetaspaceAux::inc_capacity(mdtype(), words); |
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2021 // Global total of allocated Metablocks. |
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2022 // used_words_slow() includes the overhead in each |
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2023 // Metachunk so include it in the used when the |
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2024 // Metachunk is first added (so only added once per |
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2025 // Metachunk). |
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2026 MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
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2027 } |
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2028 |
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2029 void SpaceManager::inc_used_metrics(size_t words) { |
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2030 // Add to the per SpaceManager total |
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2031 Atomic::add_ptr(words, &_allocated_blocks_words); |
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2032 // Add to the global total |
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2033 MetaspaceAux::inc_used(mdtype(), words); |
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2034 } |
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2035 |
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2036 void SpaceManager::dec_total_from_size_metrics() { |
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2037 MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
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2038 MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
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2039 // Also deduct the overhead per Metachunk |
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2040 MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
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2041 } |
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2042 |
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2043 void SpaceManager::initialize() { |
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2044 Metadebug::init_allocation_fail_alot_count(); |
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2045 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2046 _chunks_in_use[i] = NULL; |
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2047 } |
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2048 _current_chunk = NULL; |
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2049 if (TraceMetadataChunkAllocation && Verbose) { |
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2050 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2051 } |
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2052 } |
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2053 |
10101
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|
2054 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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2055 if (chunks == NULL) { |
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|
2056 return; |
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|
2057 } |
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2058 ChunkList* list = free_chunks(index); |
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2059 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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2060 assert_lock_strong(SpaceManager::expand_lock()); |
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2061 Metachunk* cur = chunks; |
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2062 |
10175 | 2063 // This returns chunks one at a time. If a new |
10101
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2064 // class List can be created that is a base class |
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2065 // of FreeList then something like FreeList::prepend() |
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2066 // can be used in place of this loop |
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2067 while (cur != NULL) { |
10175 | 2068 assert(cur->container() != NULL, "Container should have been set"); |
2069 cur->container()->dec_container_count(); | |
10101
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2070 // Capture the next link before it is changed |
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2071 // by the call to return_chunk_at_head(); |
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2072 Metachunk* next = cur->next(); |
12902 | 2073 DEBUG_ONLY(cur->set_is_tagged_free(true);) |
10101
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2074 list->return_chunk_at_head(cur); |
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2075 cur = next; |
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|
2076 } |
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|
2077 } |
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2078 |
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2079 SpaceManager::~SpaceManager() { |
8784
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2080 // This call this->_lock which can't be done while holding expand_lock() |
10183
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2081 assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
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2082 err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
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2083 " allocated_chunks_words() " SIZE_FORMAT, |
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|
2084 sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
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2085 |
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2086 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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2087 Mutex::_no_safepoint_check_flag); |
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2088 |
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2089 chunk_manager()->slow_locked_verify(); |
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2090 |
10183
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2091 dec_total_from_size_metrics(); |
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2092 |
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2093 if (TraceMetadataChunkAllocation && Verbose) { |
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2094 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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2095 locked_print_chunks_in_use_on(gclog_or_tty); |
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2096 } |
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2097 |
10175 | 2098 // Do not mangle freed Metachunks. The chunk size inside Metachunks |
2099 // is during the freeing of a VirtualSpaceNodes. | |
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2100 |
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2101 // Have to update before the chunks_in_use lists are emptied |
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2102 // below. |
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2103 chunk_manager()->inc_free_chunks_total(allocated_chunks_words(), |
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2104 sum_count_in_chunks_in_use()); |
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2105 |
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2106 // Add all the chunks in use by this space manager |
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2107 // to the global list of free chunks. |
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2108 |
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2109 // Follow each list of chunks-in-use and add them to the |
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2110 // free lists. Each list is NULL terminated. |
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2111 |
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2112 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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2113 if (TraceMetadataChunkAllocation && Verbose) { |
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2114 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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2115 sum_count_in_chunks_in_use(i), |
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2116 chunk_size_name(i)); |
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2117 } |
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2118 Metachunk* chunks = chunks_in_use(i); |
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2119 chunk_manager()->return_chunks(i, chunks); |
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2120 set_chunks_in_use(i, NULL); |
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2121 if (TraceMetadataChunkAllocation && Verbose) { |
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2122 gclog_or_tty->print_cr("updated freelist count %d %s", |
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2123 chunk_manager()->free_chunks(i)->count(), |
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2124 chunk_size_name(i)); |
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2125 } |
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2126 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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2127 } |
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2128 |
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2129 // The medium chunk case may be optimized by passing the head and |
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2130 // tail of the medium chunk list to add_at_head(). The tail is often |
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2131 // the current chunk but there are probably exceptions. |
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2132 |
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2133 // Humongous chunks |
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2134 if (TraceMetadataChunkAllocation && Verbose) { |
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2135 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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2136 sum_count_in_chunks_in_use(HumongousIndex), |
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2137 chunk_size_name(HumongousIndex)); |
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2138 gclog_or_tty->print("Humongous chunk dictionary: "); |
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2139 } |
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2140 // Humongous chunks are never the current chunk. |
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2141 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2142 |
6885 | 2143 while (humongous_chunks != NULL) { |
2144 #ifdef ASSERT | |
12902 | 2145 humongous_chunks->set_is_tagged_free(true); |
6885 | 2146 #endif |
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2147 if (TraceMetadataChunkAllocation && Verbose) { |
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2148 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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2149 humongous_chunks, |
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2150 humongous_chunks->word_size()); |
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2151 } |
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2152 assert(humongous_chunks->word_size() == (size_t) |
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2153 align_size_up(humongous_chunks->word_size(), |
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2154 HumongousChunkGranularity), |
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2155 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
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2156 " granularity %d", |
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2157 humongous_chunks->word_size(), HumongousChunkGranularity)); |
6885 | 2158 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
10175 | 2159 humongous_chunks->container()->dec_container_count(); |
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2160 chunk_manager()->humongous_dictionary()->return_chunk(humongous_chunks); |
6885 | 2161 humongous_chunks = next_humongous_chunks; |
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2162 } |
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2163 if (TraceMetadataChunkAllocation && Verbose) { |
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2164 gclog_or_tty->print_cr(""); |
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2165 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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2166 chunk_manager()->humongous_dictionary()->total_count(), |
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2167 chunk_size_name(HumongousIndex)); |
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2168 } |
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2169 chunk_manager()->slow_locked_verify(); |
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2170 } |
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2171 |
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2172 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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2173 switch (index) { |
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2174 case SpecializedIndex: |
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2175 return "Specialized"; |
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2176 case SmallIndex: |
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2177 return "Small"; |
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2178 case MediumIndex: |
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2179 return "Medium"; |
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2180 case HumongousIndex: |
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2181 return "Humongous"; |
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2182 default: |
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2183 return NULL; |
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2184 } |
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2185 } |
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2186 |
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2187 ChunkIndex ChunkManager::list_index(size_t size) { |
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2188 switch (size) { |
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2189 case SpecializedChunk: |
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2190 assert(SpecializedChunk == ClassSpecializedChunk, |
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2191 "Need branch for ClassSpecializedChunk"); |
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2192 return SpecializedIndex; |
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2193 case SmallChunk: |
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2194 case ClassSmallChunk: |
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2195 return SmallIndex; |
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2196 case MediumChunk: |
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2197 case ClassMediumChunk: |
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2198 return MediumIndex; |
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2199 default: |
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2200 assert(size > MediumChunk || size > ClassMediumChunk, |
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2201 "Not a humongous chunk"); |
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2202 return HumongousIndex; |
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2203 } |
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2204 } |
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2205 |
6885 | 2206 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2207 assert_lock_strong(_lock); |
11966 | 2208 size_t raw_word_size = get_raw_word_size(word_size); |
6885 | 2209 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
11966 | 2210 assert(raw_word_size >= min_size, |
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2211 err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
11966 | 2212 block_freelists()->return_block(p, raw_word_size); |
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2213 } |
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2214 |
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2215 // Adds a chunk to the list of chunks in use. |
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2216 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2217 |
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2218 assert(new_chunk != NULL, "Should not be NULL"); |
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2219 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2220 |
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2221 new_chunk->reset_empty(); |
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2222 |
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2223 // Find the correct list and and set the current |
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2224 // chunk for that list. |
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2225 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2226 |
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2227 if (index != HumongousIndex) { |
12231
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2228 retire_current_chunk(); |
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2229 set_current_chunk(new_chunk); |
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2230 new_chunk->set_next(chunks_in_use(index)); |
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2231 set_chunks_in_use(index, new_chunk); |
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2232 } else { |
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2233 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2234 // small, so small will be null. Link this first chunk as the current |
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2235 // chunk. |
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2236 if (make_current) { |
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2237 // Set as the current chunk but otherwise treat as a humongous chunk. |
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2238 set_current_chunk(new_chunk); |
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2239 } |
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2240 // Link at head. The _current_chunk only points to a humongous chunk for |
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2241 // the null class loader metaspace (class and data virtual space managers) |
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2242 // any humongous chunks so will not point to the tail |
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2243 // of the humongous chunks list. |
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2244 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
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2245 set_chunks_in_use(HumongousIndex, new_chunk); |
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2246 |
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2247 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
6725
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2248 } |
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2249 |
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2250 // Add to the running sum of capacity |
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2251 inc_size_metrics(new_chunk->word_size()); |
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2252 |
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2253 assert(new_chunk->is_empty(), "Not ready for reuse"); |
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2254 if (TraceMetadataChunkAllocation && Verbose) { |
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2255 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
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2256 sum_count_in_chunks_in_use()); |
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2257 new_chunk->print_on(gclog_or_tty); |
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2258 chunk_manager()->locked_print_free_chunks(gclog_or_tty); |
6725
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2259 } |
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|
2260 } |
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|
2261 |
12231
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|
2262 void SpaceManager::retire_current_chunk() { |
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2263 if (current_chunk() != NULL) { |
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2264 size_t remaining_words = current_chunk()->free_word_size(); |
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2265 if (remaining_words >= TreeChunk<Metablock, FreeList>::min_size()) { |
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2266 block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
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2267 inc_used_metrics(remaining_words); |
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|
2268 } |
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|
2269 } |
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|
2270 } |
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|
2271 |
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2272 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
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2273 size_t grow_chunks_by_words) { |
12303
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|
2274 // Get a chunk from the chunk freelist |
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|
2275 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
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|
2276 |
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|
2277 if (next == NULL) { |
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|
2278 next = vs_list()->get_new_chunk(word_size, |
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|
2279 grow_chunks_by_words, |
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|
2280 medium_chunk_bunch()); |
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|
2281 } |
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2282 |
12239 | 2283 if (TraceMetadataHumongousAllocation && next != NULL && |
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|
2284 SpaceManager::is_humongous(next->word_size())) { |
12239 | 2285 gclog_or_tty->print_cr(" new humongous chunk word size " |
2286 PTR_FORMAT, next->word_size()); | |
7446
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|
2287 } |
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|
2288 |
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|
2289 return next; |
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|
2290 } |
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|
2291 |
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2292 MetaWord* SpaceManager::allocate(size_t word_size) { |
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|
2293 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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|
2294 |
10376
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8014912: Restore PrintSharedSpaces functionality after NPG
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10330
diff
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|
2295 size_t raw_word_size = get_raw_word_size(word_size); |
6725
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|
2296 BlockFreelist* fl = block_freelists(); |
6885 | 2297 MetaWord* p = NULL; |
6725
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|
2298 // Allocation from the dictionary is expensive in the sense that |
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|
2299 // the dictionary has to be searched for a size. Don't allocate |
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|
2300 // from the dictionary until it starts to get fat. Is this |
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|
2301 // a reasonable policy? Maybe an skinny dictionary is fast enough |
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|
2302 // for allocations. Do some profiling. JJJ |
6885 | 2303 if (fl->total_size() > allocation_from_dictionary_limit) { |
2304 p = fl->get_block(raw_word_size); | |
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|
2305 } |
6885 | 2306 if (p == NULL) { |
2307 p = allocate_work(raw_word_size); | |
6725
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|
2308 } |
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|
2309 |
6885 | 2310 return p; |
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|
2311 } |
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|
2312 |
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|
2313 // Returns the address of spaced allocated for "word_size". |
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|
2314 // This methods does not know about blocks (Metablocks) |
6885 | 2315 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
6725
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|
2316 assert_lock_strong(_lock); |
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|
2317 #ifdef ASSERT |
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|
2318 if (Metadebug::test_metadata_failure()) { |
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|
2319 return NULL; |
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|
2320 } |
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|
2321 #endif |
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|
2322 // Is there space in the current chunk? |
6885 | 2323 MetaWord* result = NULL; |
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|
2324 |
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|
2325 // For DumpSharedSpaces, only allocate out of the current chunk which is |
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|
2326 // never null because we gave it the size we wanted. Caller reports out |
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|
2327 // of memory if this returns null. |
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|
2328 if (DumpSharedSpaces) { |
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|
2329 assert(current_chunk() != NULL, "should never happen"); |
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|
2330 inc_used_metrics(word_size); |
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|
2331 return current_chunk()->allocate(word_size); // caller handles null result |
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|
2332 } |
12838
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|
2333 |
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|
2334 if (current_chunk() != NULL) { |
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|
2335 result = current_chunk()->allocate(word_size); |
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|
2336 } |
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|
2337 |
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|
2338 if (result == NULL) { |
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|
2339 result = grow_and_allocate(word_size); |
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|
2340 } |
12838
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|
2341 |
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|
2342 if (result != NULL) { |
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|
2343 inc_used_metrics(word_size); |
6885 | 2344 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2345 "Head of the list is being allocated"); | |
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|
2346 } |
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|
2347 |
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|
2348 return result; |
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|
2349 } |
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|
2350 |
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|
2351 void SpaceManager::verify() { |
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|
2352 // If there are blocks in the dictionary, then |
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|
2353 // verfication of chunks does not work since |
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|
2354 // being in the dictionary alters a chunk. |
6885 | 2355 if (block_freelists()->total_size() == 0) { |
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|
2356 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2357 Metachunk* curr = chunks_in_use(i); |
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2358 while (curr != NULL) { |
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2359 curr->verify(); |
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2360 verify_chunk_size(curr); |
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2361 curr = curr->next(); |
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2362 } |
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|
2363 } |
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|
2364 } |
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2365 } |
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|
2366 |
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2367 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
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2368 assert(is_humongous(chunk->word_size()) || |
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2369 chunk->word_size() == medium_chunk_size() || |
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2370 chunk->word_size() == small_chunk_size() || |
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|
2371 chunk->word_size() == specialized_chunk_size(), |
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|
2372 "Chunk size is wrong"); |
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2373 return; |
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|
2374 } |
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|
2375 |
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2376 #ifdef ASSERT |
10183
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2377 void SpaceManager::verify_allocated_blocks_words() { |
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2378 // Verification is only guaranteed at a safepoint. |
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2379 assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
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2380 "Verification can fail if the applications is running"); |
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2381 assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
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|
2382 err_msg("allocation total is not consistent " SIZE_FORMAT |
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2383 " vs " SIZE_FORMAT, |
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2384 allocated_blocks_words(), sum_used_in_chunks_in_use())); |
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2385 } |
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|
2386 |
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|
2387 #endif |
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|
2388 |
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|
2389 void SpaceManager::dump(outputStream* const out) const { |
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|
2390 size_t curr_total = 0; |
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|
2391 size_t waste = 0; |
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|
2392 uint i = 0; |
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|
2393 size_t used = 0; |
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|
2394 size_t capacity = 0; |
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|
2395 |
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|
2396 // Add up statistics for all chunks in this SpaceManager. |
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|
2397 for (ChunkIndex index = ZeroIndex; |
6885 | 2398 index < NumberOfInUseLists; |
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2399 index = next_chunk_index(index)) { |
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|
2400 for (Metachunk* curr = chunks_in_use(index); |
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2401 curr != NULL; |
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2402 curr = curr->next()) { |
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|
2403 out->print("%d) ", i++); |
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|
2404 curr->print_on(out); |
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|
2405 curr_total += curr->word_size(); |
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|
2406 used += curr->used_word_size(); |
12902 | 2407 capacity += curr->word_size(); |
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2408 waste += curr->free_word_size() + curr->overhead();; |
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|
2409 } |
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|
2410 } |
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|
2411 |
12239 | 2412 if (TraceMetadataChunkAllocation && Verbose) { |
2413 block_freelists()->print_on(out); | |
2414 } | |
2415 | |
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2416 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
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|
2417 // Free space isn't wasted. |
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|
2418 waste -= free; |
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|
2419 |
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|
2420 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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|
2421 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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|
2422 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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|
2423 } |
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|
2424 |
7185
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6969
diff
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|
2425 #ifndef PRODUCT |
6725
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|
2426 void SpaceManager::mangle_freed_chunks() { |
7446
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|
2427 for (ChunkIndex index = ZeroIndex; |
6885 | 2428 index < NumberOfInUseLists; |
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|
2429 index = next_chunk_index(index)) { |
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|
2430 for (Metachunk* curr = chunks_in_use(index); |
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|
2431 curr != NULL; |
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|
2432 curr = curr->next()) { |
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|
2433 curr->mangle(); |
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|
2434 } |
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|
2435 } |
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|
2436 } |
7185
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coleenp
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6969
diff
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|
2437 #endif // PRODUCT |
6725
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|
2438 |
da91efe96a93
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|
2439 // MetaspaceAux |
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|
2440 |
10183
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|
2441 |
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|
2442 size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
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|
2443 size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
10183
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|
2444 |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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|
2445 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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|
2446 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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12056
diff
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|
2447 return list == NULL ? 0 : list->free_bytes(); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
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|
2448 } |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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12056
diff
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|
2449 |
10183
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10175
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|
2450 size_t MetaspaceAux::free_bytes() { |
12063
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ehelin
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12056
diff
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|
2451 return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
10183
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|
2452 } |
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|
2453 |
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diff
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|
2454 void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2455 assert_lock_strong(SpaceManager::expand_lock()); |
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10191
diff
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|
2456 assert(words <= allocated_capacity_words(mdtype), |
10183
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|
2457 err_msg("About to decrement below 0: words " SIZE_FORMAT |
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|
2458 " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
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|
2459 words, mdtype, allocated_capacity_words(mdtype))); |
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|
2460 _allocated_capacity_words[mdtype] -= words; |
10183
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|
2461 } |
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|
2462 |
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|
2463 void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2464 assert_lock_strong(SpaceManager::expand_lock()); |
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|
2465 // Needs to be atomic |
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|
2466 _allocated_capacity_words[mdtype] += words; |
10183
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|
2467 } |
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|
2468 |
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|
2469 void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
2b1a9d972fc2
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|
2470 assert(words <= allocated_used_words(mdtype), |
10183
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|
2471 err_msg("About to decrement below 0: words " SIZE_FORMAT |
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|
2472 " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
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|
2473 words, mdtype, allocated_used_words(mdtype))); |
10183
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|
2474 // For CMS deallocation of the Metaspaces occurs during the |
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|
2475 // sweep which is a concurrent phase. Protection by the expand_lock() |
868d87ed63c8
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|
2476 // is not enough since allocation is on a per Metaspace basis |
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|
2477 // and protected by the Metaspace lock. |
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|
2478 jlong minus_words = (jlong) - (jlong) words; |
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|
2479 Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
10183
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|
2480 } |
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|
2481 |
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|
2482 void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2483 // _allocated_used_words tracks allocations for |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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diff
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|
2484 // each piece of metadata. Those allocations are |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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|
2485 // generally done concurrently by different application |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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diff
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|
2486 // threads so must be done atomically. |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
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10191
diff
changeset
|
2487 Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
10183
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|
2488 } |
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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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|
2489 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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10175
diff
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|
2490 size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
changeset
|
2491 size_t used = 0; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
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|
2492 ClassLoaderDataGraphMetaspaceIterator iter; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
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|
2493 while (iter.repeat()) { |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
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|
2494 Metaspace* msp = iter.get_next(); |
10183
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10175
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|
2495 // Sum allocated_blocks_words for each metaspace |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
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|
2496 if (msp != NULL) { |
10183
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8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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|
2497 used += msp->used_words_slow(mdtype); |
6730
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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6726
diff
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|
2498 } |
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7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
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diff
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|
2499 } |
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6726
diff
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|
2500 return used * BytesPerWord; |
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diff
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|
2501 } |
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|
2502 |
12235 | 2503 size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
6725
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|
2504 size_t free = 0; |
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6964458: Reimplement class meta-data storage to use native memory
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|
2505 ClassLoaderDataGraphMetaspaceIterator iter; |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2506 while (iter.repeat()) { |
da91efe96a93
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|
2507 Metaspace* msp = iter.get_next(); |
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|
2508 if (msp != NULL) { |
12235 | 2509 free += msp->free_words_slow(mdtype); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
2510 } |
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diff
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|
2511 } |
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6964458: Reimplement class meta-data storage to use native memory
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|
2512 return free * BytesPerWord; |
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diff
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|
2513 } |
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diff
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|
2514 |
10183
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|
2515 size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
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|
2516 if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
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8003424: Enable Class Data Sharing for CompressedOops
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|
2517 return 0; |
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diff
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|
2518 } |
10183
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|
2519 // Don't count the space in the freelists. That space will be |
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|
2520 // added to the capacity calculation as needed. |
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|
2521 size_t capacity = 0; |
6725
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|
2522 ClassLoaderDataGraphMetaspaceIterator iter; |
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|
2523 while (iter.repeat()) { |
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|
2524 Metaspace* msp = iter.get_next(); |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2525 if (msp != NULL) { |
10183
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|
2526 capacity += msp->capacity_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2527 } |
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diff
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|
2528 } |
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2529 return capacity * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2530 } |
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diff
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|
2531 |
12235 | 2532 size_t MetaspaceAux::capacity_bytes_slow() { |
2533 #ifdef PRODUCT | |
2534 // Use allocated_capacity_bytes() in PRODUCT instead of this function. | |
2535 guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); | |
2536 #endif | |
2537 size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); | |
2538 size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); | |
2539 assert(allocated_capacity_bytes() == class_capacity + non_class_capacity, | |
2540 err_msg("bad accounting: allocated_capacity_bytes() " SIZE_FORMAT | |
2541 " class_capacity + non_class_capacity " SIZE_FORMAT | |
2542 " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, | |
2543 allocated_capacity_bytes(), class_capacity + non_class_capacity, | |
2544 class_capacity, non_class_capacity)); | |
2545 | |
2546 return class_capacity + non_class_capacity; | |
6725
da91efe96a93
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diff
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|
2547 } |
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diff
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|
2548 |
12235 | 2549 size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
2550 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
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|
2551 return list == NULL ? 0 : list->reserved_bytes(); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
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12235
diff
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|
2552 } |
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8024638: Count and expose the amount of committed memory in the metaspaces
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12235
diff
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|
2553 |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
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parents:
12235
diff
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|
2554 size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
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8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
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|
2555 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
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8024638: Count and expose the amount of committed memory in the metaspaces
stefank
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12235
diff
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|
2556 return list == NULL ? 0 : list->committed_bytes(); |
12235 | 2557 } |
2558 | |
2559 size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } | |
2560 | |
2561 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
|
2562 ChunkManager* chunk_manager = Metaspace::get_chunk_manager(mdtype); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
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12302
diff
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|
2563 if (chunk_manager == NULL) { |
12056
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8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
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|
2564 return 0; |
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8003424: Enable Class Data Sharing for CompressedOops
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parents:
11966
diff
changeset
|
2565 } |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2566 chunk_manager->slow_verify(); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2567 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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diff
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|
2568 } |
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diff
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|
2569 |
12235 | 2570 size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
2571 return free_chunks_total_words(mdtype) * BytesPerWord; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2572 } |
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diff
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|
2573 |
12235 | 2574 size_t MetaspaceAux::free_chunks_total_words() { |
2575 return free_chunks_total_words(Metaspace::ClassType) + | |
2576 free_chunks_total_words(Metaspace::NonClassType); | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
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parents:
10175
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|
2577 } |
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parents:
10175
diff
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|
2578 |
12235 | 2579 size_t MetaspaceAux::free_chunks_total_bytes() { |
2580 return free_chunks_total_words() * BytesPerWord; | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
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|
2581 } |
868d87ed63c8
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parents:
10175
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|
2582 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2583 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2584 gclog_or_tty->print(", [Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2585 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2586 gclog_or_tty->print(" " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2587 "->" SIZE_FORMAT |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
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|
2588 "(" SIZE_FORMAT ")", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2589 prev_metadata_used, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2590 allocated_used_bytes(), |
12235 | 2591 reserved_bytes()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
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|
2592 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2593 gclog_or_tty->print(" " SIZE_FORMAT "K" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2594 "->" SIZE_FORMAT "K" |
10183
868d87ed63c8
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10175
diff
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|
2595 "(" SIZE_FORMAT "K)", |
12235 | 2596 prev_metadata_used/K, |
2597 allocated_used_bytes()/K, | |
2598 reserved_bytes()/K); | |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2599 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2600 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2601 gclog_or_tty->print("]"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2602 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2603 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
2604 // This is printed when PrintGCDetails |
da91efe96a93
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diff
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|
2605 void MetaspaceAux::print_on(outputStream* out) { |
da91efe96a93
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|
2606 Metaspace::MetadataType nct = Metaspace::NonClassType; |
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|
2607 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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diff
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|
2608 out->print_cr(" Metaspace " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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|
2609 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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12340
diff
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|
2610 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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|
2611 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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|
2612 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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12340
diff
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|
2613 allocated_used_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
changeset
|
2614 allocated_capacity_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
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|
2615 committed_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
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|
2616 reserved_bytes()/K); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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12340
diff
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|
2617 |
12056
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11966
diff
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|
2618 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
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|
2619 Metaspace::MetadataType ct = Metaspace::ClassType; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
2620 out->print_cr(" class space " |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2621 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
changeset
|
2622 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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changeset
|
2623 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
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|
2624 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
changeset
|
2625 allocated_used_bytes(ct)/K, |
12056
740e263c80c6
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hseigel
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11966
diff
changeset
|
2626 allocated_capacity_bytes(ct)/K, |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2627 committed_bytes(ct)/K, |
12235 | 2628 reserved_bytes(ct)/K); |
12056
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hseigel
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11966
diff
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|
2629 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2630 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
2631 |
da91efe96a93
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coleenp
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|
2632 // Print information for class space and data space separately. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2633 // This is almost the same as above. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2634 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
12235 | 2635 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
|
2636 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
|
2637 size_t used_bytes = used_bytes_slow(mdtype); |
12235 | 2638 size_t free_bytes = free_bytes_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2639 size_t used_and_free = used_bytes + free_bytes + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2640 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2641 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
|
2642 "K + unused in chunks " SIZE_FORMAT "K + " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2643 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2644 "K capacity in allocated chunks " SIZE_FORMAT "K", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2645 used_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2646 free_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2647 free_chunks_capacity_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2648 used_and_free / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2649 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
|
2650 // 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
|
2651 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
|
2652 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2653 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2654 // Print total fragmentation for class metaspaces |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2655 void MetaspaceAux::print_class_waste(outputStream* out) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2656 assert(Metaspace::using_class_space(), "class metaspace not used"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2657 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
|
2658 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
|
2659 ClassLoaderDataGraphMetaspaceIterator iter; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2660 while (iter.repeat()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2661 Metaspace* msp = iter.get_next(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2662 if (msp != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2663 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
|
2664 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
|
2665 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
|
2666 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
|
2667 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
|
2668 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
|
2669 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
|
2670 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2671 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2672 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2673 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2674 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2675 "large count " SIZE_FORMAT, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2676 cls_specialized_count, cls_specialized_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2677 cls_small_count, cls_small_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2678 cls_medium_count, cls_medium_waste, cls_humongous_count); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2679 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2680 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2681 // 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
|
2682 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
|
2683 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
|
2684 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
|
2685 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2686 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2687 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2688 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2689 if (msp != NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2690 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
|
2691 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
|
2692 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
|
2693 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
|
2694 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
|
2695 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
|
2696 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
|
2697 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2698 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2699 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
|
2700 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
|
2701 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
|
2702 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
|
2703 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2704 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
|
2705 small_waste, medium_count, medium_waste, humongous_count); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2706 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2707 print_class_waste(out); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2708 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2709 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2710 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2711 // Dump global metaspace things from the end of ClassLoaderDataGraph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2712 void MetaspaceAux::dump(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2713 out->print_cr("All Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2714 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2715 out->print("class space: "); print_on(out, Metaspace::ClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2716 print_waste(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2717 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2718 |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2719 void MetaspaceAux::verify_free_chunks() { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2720 Metaspace::chunk_manager_metadata()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2721 if (Metaspace::using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2722 Metaspace::chunk_manager_class()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2723 } |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2724 } |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2725 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2726 void MetaspaceAux::verify_capacity() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2727 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2728 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
|
2729 // 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
|
2730 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
|
2731 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
|
2732 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
|
2733 " capacity_bytes_slow()" SIZE_FORMAT, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2734 running_sum_capacity_bytes, capacity_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2735 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2736 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2737 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2738 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
|
2739 assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2740 err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2741 " capacity_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2742 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
|
2743 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2744 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2745 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2746 |
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2747 void MetaspaceAux::verify_used() { |
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|
2748 #ifdef ASSERT |
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|
2749 size_t running_sum_used_bytes = allocated_used_bytes(); |
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|
2750 // For purposes of the running sum of used, verify against used |
10183
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|
2751 size_t used_in_use_bytes = used_bytes_slow(); |
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|
2752 assert(allocated_used_bytes() == used_in_use_bytes, |
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|
2753 err_msg("allocated_used_bytes() " SIZE_FORMAT |
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|
2754 " used_bytes_slow()" SIZE_FORMAT, |
10183
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|
2755 allocated_used_bytes(), used_in_use_bytes)); |
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2756 for (Metaspace::MetadataType i = Metaspace::ClassType; |
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|
2757 i < Metaspace:: MetadataTypeCount; |
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|
2758 i = (Metaspace::MetadataType)(i + 1)) { |
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|
2759 size_t used_in_use_bytes = used_bytes_slow(i); |
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2760 assert(allocated_used_bytes(i) == used_in_use_bytes, |
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|
2761 err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
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|
2762 " used_bytes_slow(%u)" SIZE_FORMAT, |
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|
2763 i, allocated_used_bytes(i), i, used_in_use_bytes)); |
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|
2764 } |
10183
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|
2765 #endif |
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|
2766 } |
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|
2767 |
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|
2768 void MetaspaceAux::verify_metrics() { |
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|
2769 verify_capacity(); |
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|
2770 verify_used(); |
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|
2771 } |
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|
2772 |
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|
2773 |
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|
2774 // Metaspace methods |
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|
2775 |
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2776 size_t Metaspace::_first_chunk_word_size = 0; |
7446
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8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
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|
2777 size_t Metaspace::_first_class_chunk_word_size = 0; |
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|
2778 |
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2779 size_t Metaspace::_commit_alignment = 0; |
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2780 size_t Metaspace::_reserve_alignment = 0; |
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|
2781 |
7446
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|
2782 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
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|
2783 initialize(lock, type); |
6725
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|
2784 } |
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|
2785 |
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|
2786 Metaspace::~Metaspace() { |
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|
2787 delete _vsm; |
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|
2788 if (using_class_space()) { |
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|
2789 delete _class_vsm; |
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|
2790 } |
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|
2791 } |
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|
2792 |
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|
2793 VirtualSpaceList* Metaspace::_space_list = NULL; |
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|
2794 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
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|
2795 |
12303
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8025096: Move the ChunkManager instances out of the VirtualSpaceLists
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12302
diff
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|
2796 ChunkManager* Metaspace::_chunk_manager_metadata = NULL; |
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8025096: Move the ChunkManager instances out of the VirtualSpaceLists
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12302
diff
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|
2797 ChunkManager* Metaspace::_chunk_manager_class = NULL; |
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diff
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|
2798 |
6725
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|
2799 #define VIRTUALSPACEMULTIPLIER 2 |
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|
2800 |
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diff
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|
2801 #ifdef _LP64 |
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|
2802 void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
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|
2803 // Figure out the narrow_klass_base and the narrow_klass_shift. The |
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|
2804 // narrow_klass_base is the lower of the metaspace base and the cds base |
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diff
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|
2805 // (if cds is enabled). The narrow_klass_shift depends on the distance |
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11966
diff
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|
2806 // between the lower base and higher address. |
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11966
diff
changeset
|
2807 address lower_base; |
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11966
diff
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|
2808 address higher_address; |
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11966
diff
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|
2809 if (UseSharedSpaces) { |
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diff
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|
2810 higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
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|
2811 (address)(metaspace_base + class_metaspace_size())); |
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diff
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|
2812 lower_base = MIN2(metaspace_base, cds_base); |
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11966
diff
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|
2813 } else { |
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11966
diff
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|
2814 higher_address = metaspace_base + class_metaspace_size(); |
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11966
diff
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|
2815 lower_base = metaspace_base; |
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diff
changeset
|
2816 } |
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diff
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|
2817 Universe::set_narrow_klass_base(lower_base); |
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|
2818 if ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint) { |
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diff
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|
2819 Universe::set_narrow_klass_shift(0); |
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11966
diff
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|
2820 } else { |
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11966
diff
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|
2821 assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
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11966
diff
changeset
|
2822 Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
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11966
diff
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|
2823 } |
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11966
diff
changeset
|
2824 } |
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diff
changeset
|
2825 |
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diff
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|
2826 // Return TRUE if the specified metaspace_base and cds_base are close enough |
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8003424: Enable Class Data Sharing for CompressedOops
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11966
diff
changeset
|
2827 // to work with compressed klass pointers. |
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diff
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|
2828 bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
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diff
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|
2829 assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
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12110
diff
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|
2830 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
12056
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|
2831 address lower_base = MIN2((address)metaspace_base, cds_base); |
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|
2832 address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
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|
2833 (address)(metaspace_base + class_metaspace_size())); |
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|
2834 return ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint); |
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diff
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|
2835 } |
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diff
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|
2836 |
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diff
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|
2837 // Try to allocate the metaspace at the requested addr. |
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diff
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|
2838 void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
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diff
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|
2839 assert(using_class_space(), "called improperly"); |
12226
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12110
diff
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|
2840 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
12056
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|
2841 assert(class_metaspace_size() < KlassEncodingMetaspaceMax, |
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diff
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|
2842 "Metaspace size is too big"); |
12838
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|
2843 assert_is_ptr_aligned(requested_addr, _reserve_alignment); |
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|
2844 assert_is_ptr_aligned(cds_base, _reserve_alignment); |
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|
2845 assert_is_size_aligned(class_metaspace_size(), _reserve_alignment); |
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|
2846 |
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diff
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|
2847 // Don't use large pages for the class space. |
85c1ca43713f
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|
2848 bool large_pages = false; |
12056
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diff
changeset
|
2849 |
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diff
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|
2850 ReservedSpace metaspace_rs = ReservedSpace(class_metaspace_size(), |
12838
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|
2851 _reserve_alignment, |
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diff
changeset
|
2852 large_pages, |
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12340
diff
changeset
|
2853 requested_addr, 0); |
12056
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diff
changeset
|
2854 if (!metaspace_rs.is_reserved()) { |
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|
2855 if (UseSharedSpaces) { |
12838
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|
2856 size_t increment = align_size_up(1*G, _reserve_alignment); |
85c1ca43713f
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|
2857 |
12056
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11966
diff
changeset
|
2858 // Keep trying to allocate the metaspace, increasing the requested_addr |
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diff
changeset
|
2859 // by 1GB each time, until we reach an address that will no longer allow |
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11966
diff
changeset
|
2860 // use of CDS with compressed klass pointers. |
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diff
changeset
|
2861 char *addr = requested_addr; |
12838
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|
2862 while (!metaspace_rs.is_reserved() && (addr + increment > addr) && |
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|
2863 can_use_cds_with_metaspace_addr(addr + increment, cds_base)) { |
85c1ca43713f
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|
2864 addr = addr + increment; |
12056
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diff
changeset
|
2865 metaspace_rs = ReservedSpace(class_metaspace_size(), |
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2866 _reserve_alignment, large_pages, addr, 0); |
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2867 } |
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2868 } |
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2869 |
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2870 // If no successful allocation then try to allocate the space anywhere. If |
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2871 // that fails then OOM doom. At this point we cannot try allocating the |
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2872 // metaspace as if UseCompressedClassPointers is off because too much |
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2873 // initialization has happened that depends on UseCompressedClassPointers. |
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2874 // So, UseCompressedClassPointers cannot be turned off at this point. |
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2875 if (!metaspace_rs.is_reserved()) { |
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2876 metaspace_rs = ReservedSpace(class_metaspace_size(), |
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2877 _reserve_alignment, large_pages); |
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2878 if (!metaspace_rs.is_reserved()) { |
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2879 vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
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2880 class_metaspace_size())); |
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2881 } |
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2882 } |
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2883 } |
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2884 |
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2885 // If we got here then the metaspace got allocated. |
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2886 MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
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2887 |
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2888 // Verify that we can use shared spaces. Otherwise, turn off CDS. |
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2889 if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
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2890 FileMapInfo::stop_sharing_and_unmap( |
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2891 "Could not allocate metaspace at a compatible address"); |
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2892 } |
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2893 |
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2894 set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
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2895 UseSharedSpaces ? (address)cds_base : 0); |
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2896 |
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2897 initialize_class_space(metaspace_rs); |
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2898 |
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2899 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
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2900 gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
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2901 Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
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2902 gclog_or_tty->print_cr("Metaspace Size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
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2903 class_metaspace_size(), metaspace_rs.base(), requested_addr); |
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2904 } |
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2905 } |
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2906 |
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2907 // For UseCompressedClassPointers the class space is reserved above the top of |
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2908 // the Java heap. The argument passed in is at the base of the compressed space. |
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2909 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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2910 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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2911 assert(rs.size() >= CompressedClassSpaceSize, |
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2912 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
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2913 assert(using_class_space(), "Must be using class space"); |
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2914 _class_space_list = new VirtualSpaceList(rs); |
12303
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2915 _chunk_manager_class = new ChunkManager(SpecializedChunk, ClassSmallChunk, ClassMediumChunk); |
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2916 |
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2917 if (!_class_space_list->initialization_succeeded()) { |
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2918 vm_exit_during_initialization("Failed to setup compressed class space virtual space list."); |
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2919 } |
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|
2920 } |
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2921 |
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2922 #endif |
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2923 |
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2924 // Align down. If the aligning result in 0, return 'alignment'. |
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2925 static size_t restricted_align_down(size_t size, size_t alignment) { |
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2926 return MAX2(alignment, align_size_down_(size, alignment)); |
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2927 } |
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2928 |
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2929 void Metaspace::ergo_initialize() { |
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2930 if (DumpSharedSpaces) { |
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2931 // Using large pages when dumping the shared archive is currently not implemented. |
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2932 FLAG_SET_ERGO(bool, UseLargePagesInMetaspace, false); |
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2933 } |
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2934 |
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2935 size_t page_size = os::vm_page_size(); |
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2936 if (UseLargePages && UseLargePagesInMetaspace) { |
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2937 page_size = os::large_page_size(); |
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|
2938 } |
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|
2939 |
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2940 _commit_alignment = page_size; |
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2941 _reserve_alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity()); |
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2942 |
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2943 // Do not use FLAG_SET_ERGO to update MaxMetaspaceSize, since this will |
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2944 // override if MaxMetaspaceSize was set on the command line or not. |
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2945 // This information is needed later to conform to the specification of the |
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2946 // java.lang.management.MemoryUsage API. |
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|
2947 // |
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2948 // Ideally, we would be able to set the default value of MaxMetaspaceSize in |
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2949 // globals.hpp to the aligned value, but this is not possible, since the |
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2950 // alignment depends on other flags being parsed. |
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2951 MaxMetaspaceSize = restricted_align_down(MaxMetaspaceSize, _reserve_alignment); |
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2952 |
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2953 if (MetaspaceSize > MaxMetaspaceSize) { |
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2954 MetaspaceSize = MaxMetaspaceSize; |
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|
2955 } |
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|
2956 |
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|
2957 MetaspaceSize = restricted_align_down(MetaspaceSize, _commit_alignment); |
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|
2958 |
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|
2959 assert(MetaspaceSize <= MaxMetaspaceSize, "MetaspaceSize should be limited by MaxMetaspaceSize"); |
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2960 |
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|
2961 if (MetaspaceSize < 256*K) { |
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2962 vm_exit_during_initialization("Too small initial Metaspace size"); |
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|
2963 } |
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|
2964 |
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|
2965 MinMetaspaceExpansion = restricted_align_down(MinMetaspaceExpansion, _commit_alignment); |
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2966 MaxMetaspaceExpansion = restricted_align_down(MaxMetaspaceExpansion, _commit_alignment); |
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2967 |
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|
2968 CompressedClassSpaceSize = restricted_align_down(CompressedClassSpaceSize, _reserve_alignment); |
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|
2969 set_class_metaspace_size(CompressedClassSpaceSize); |
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|
2970 } |
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|
2971 |
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|
2972 void Metaspace::global_initialize() { |
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|
2973 // Initialize the alignment for shared spaces. |
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|
2974 int max_alignment = os::vm_page_size(); |
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|
2975 size_t cds_total = 0; |
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|
2976 |
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|
2977 MetaspaceShared::set_max_alignment(max_alignment); |
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|
2978 |
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|
2979 if (DumpSharedSpaces) { |
12838
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2980 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
6725
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|
2981 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
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2982 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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2983 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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|
2984 |
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changeset
|
2985 // Initialize with the sum of the shared space sizes. The read-only |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
2986 // and read write metaspace chunks will be allocated out of this and the |
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6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
2987 // remainder is the misc code and data chunks. |
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diff
changeset
|
2988 cds_total = FileMapInfo::shared_spaces_size(); |
12838
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|
2989 cds_total = align_size_up(cds_total, _reserve_alignment); |
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diff
changeset
|
2990 _space_list = new VirtualSpaceList(cds_total/wordSize); |
12303
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8025096: Move the ChunkManager instances out of the VirtualSpaceLists
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|
2991 _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
12056
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changeset
|
2992 |
12838
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|
2993 if (!_space_list->initialization_succeeded()) { |
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|
2994 vm_exit_during_initialization("Unable to dump shared archive.", NULL); |
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diff
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|
2995 } |
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diff
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|
2996 |
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diff
changeset
|
2997 #ifdef _LP64 |
12838
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2998 if (cds_total + class_metaspace_size() > (uint64_t)max_juint) { |
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|
2999 vm_exit_during_initialization("Unable to dump shared archive.", |
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|
3000 err_msg("Size of archive (" SIZE_FORMAT ") + compressed class space (" |
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|
3001 SIZE_FORMAT ") == total (" SIZE_FORMAT ") is larger than compressed " |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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|
3002 "klass limit: " SIZE_FORMAT, cds_total, class_metaspace_size(), |
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|
3003 cds_total + class_metaspace_size(), (size_t)max_juint)); |
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diff
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|
3004 } |
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changeset
|
3005 |
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diff
changeset
|
3006 // Set the compressed klass pointer base so that decoding of these pointers works |
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diff
changeset
|
3007 // properly when creating the shared archive. |
12226
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diff
changeset
|
3008 assert(UseCompressedOops && UseCompressedClassPointers, |
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diff
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|
3009 "UseCompressedOops and UseCompressedClassPointers must be set"); |
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changeset
|
3010 Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
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8003424: Enable Class Data Sharing for CompressedOops
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parents:
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diff
changeset
|
3011 if (TraceMetavirtualspaceAllocation && Verbose) { |
740e263c80c6
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hseigel
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diff
changeset
|
3012 gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
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hseigel
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diff
changeset
|
3013 _space_list->current_virtual_space()->bottom()); |
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parents:
11966
diff
changeset
|
3014 } |
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parents:
11966
diff
changeset
|
3015 |
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diff
changeset
|
3016 Universe::set_narrow_klass_shift(0); |
740e263c80c6
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hseigel
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diff
changeset
|
3017 #endif |
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diff
changeset
|
3018 |
6725
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|
3019 } else { |
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diff
changeset
|
3020 // If using shared space, open the file that contains the shared space |
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diff
changeset
|
3021 // and map in the memory before initializing the rest of metaspace (so |
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diff
changeset
|
3022 // the addresses don't conflict) |
12056
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diff
changeset
|
3023 address cds_address = NULL; |
6725
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diff
changeset
|
3024 if (UseSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3025 FileMapInfo* mapinfo = new FileMapInfo(); |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3026 memset(mapinfo, 0, sizeof(FileMapInfo)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3027 |
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6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3028 // Open the shared archive file, read and validate the header. If |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3029 // initialization fails, shared spaces [UseSharedSpaces] are |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3030 // disabled and the file is closed. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3031 // Map in spaces now also |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3032 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3033 FileMapInfo::set_current_info(mapinfo); |
12838
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|
3034 cds_total = FileMapInfo::shared_spaces_size(); |
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diff
changeset
|
3035 cds_address = (address)mapinfo->region_base(0); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3036 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3037 assert(!mapinfo->is_open() && !UseSharedSpaces, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3038 "archive file not closed or shared spaces not disabled."); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3039 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3040 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3041 |
12056
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11966
diff
changeset
|
3042 #ifdef _LP64 |
12226
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12110
diff
changeset
|
3043 // If UseCompressedClassPointers is set then allocate the metaspace area |
12056
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hseigel
parents:
11966
diff
changeset
|
3044 // above the heap and above the CDS area (if it exists). |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
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11966
diff
changeset
|
3045 if (using_class_space()) { |
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hseigel
parents:
11966
diff
changeset
|
3046 if (UseSharedSpaces) { |
12838
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|
3047 char* cds_end = (char*)(cds_address + cds_total); |
85c1ca43713f
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stefank
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diff
changeset
|
3048 cds_end = (char *)align_ptr_up(cds_end, _reserve_alignment); |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
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diff
changeset
|
3049 allocate_metaspace_compressed_klass_ptrs(cds_end, cds_address); |
12056
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3050 } else { |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
3051 allocate_metaspace_compressed_klass_ptrs((char *)CompressedKlassPointersBase, 0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3052 } |
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hseigel
parents:
11966
diff
changeset
|
3053 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3054 #endif |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3055 |
7446
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
3056 // Initialize these before initializing the VirtualSpaceList |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3057 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
7446
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
3058 _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
|
3059 // 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
|
3060 // on the medium chunk list. The next chunk will be small and progress |
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
3061 // from there. This size calculated by -version. |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3062 _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
|
3063 (CompressedClassSpaceSize/BytesPerWord)*2); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3064 _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
|
3065 // Arbitrarily set the initial virtual space to a multiple |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3066 // of the boot class loader size. |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3067 size_t word_size = VIRTUALSPACEMULTIPLIER * _first_chunk_word_size; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
changeset
|
3068 word_size = align_size_up(word_size, Metaspace::reserve_alignment_words()); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
changeset
|
3069 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3070 // Initialize the list of virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3071 _space_list = new VirtualSpaceList(word_size); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3072 _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
|
3073 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3074 if (!_space_list->initialization_succeeded()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
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12340
diff
changeset
|
3075 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
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12340
diff
changeset
|
3076 } |
6725
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coleenp
parents:
diff
changeset
|
3077 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3078 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3079 MetaspaceGC::initialize(); |
6725
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coleenp
parents:
diff
changeset
|
3080 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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parents:
diff
changeset
|
3081 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3082 Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
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12302
diff
changeset
|
3083 size_t chunk_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
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12302
diff
changeset
|
3084 size_t chunk_bunch) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
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12302
diff
changeset
|
3085 // Get a chunk from the chunk freelist |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3086 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
|
3087 if (chunk != NULL) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3088 return chunk; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3089 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3090 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3091 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
|
3092 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3093 |
12056
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hseigel
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11966
diff
changeset
|
3094 void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
6725
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coleenp
parents:
diff
changeset
|
3095 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3096 assert(space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3097 "Metadata VirtualSpaceList has not been initialized"); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3098 assert(chunk_manager_metadata() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3099 "Metadata ChunkManager has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3100 |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3101 _vsm = new SpaceManager(NonClassType, lock); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3102 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3103 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3104 } |
7446
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
3105 size_t word_size; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3106 size_t class_word_size; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3107 vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
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 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3110 assert(class_space_list() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3111 "Class VirtualSpaceList has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3112 assert(chunk_manager_class() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3113 "Class ChunkManager has not been initialized"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3114 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3115 // Allocate SpaceManager for classes. |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3116 _class_vsm = new SpaceManager(ClassType, lock); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3117 if (_class_vsm == NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3118 return; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3119 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3120 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3121 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3122 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
|
3123 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3124 // Allocate chunk for metadata objects |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3125 Metachunk* new_chunk = get_initialization_chunk(NonClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3126 word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3127 vsm()->medium_chunk_bunch()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3128 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
|
3129 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3130 // 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
|
3131 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3132 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3133 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3134 // Allocate chunk for class metadata objects |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3135 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3136 Metachunk* class_chunk = get_initialization_chunk(ClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3137 class_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3138 class_vsm()->medium_chunk_bunch()); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3139 if (class_chunk != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3140 class_vsm()->add_chunk(class_chunk, true); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3141 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3142 } |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3143 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3144 _alloc_record_head = NULL; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3145 _alloc_record_tail = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3146 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3147 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3148 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
|
3149 size_t byte_size = word_size * wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3150 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
|
3151 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3152 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3153 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3154 // DumpSharedSpaces doesn't use class metadata area (yet) |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3155 // 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
|
3156 if (is_class_space_allocation(mdtype)) { |
6885 | 3157 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3158 } else { |
6885 | 3159 return vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3160 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3161 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3162 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3163 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
|
3164 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
|
3165 assert(delta_bytes > 0, "Must be"); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3166 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3167 size_t after_inc = MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3168 size_t before_inc = after_inc - delta_bytes; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3169 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3170 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3171 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
|
3172 " to " SIZE_FORMAT, before_inc, after_inc); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3173 } |
6885 | 3174 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3175 return allocate(word_size, mdtype); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3176 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3177 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3178 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3179 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3180 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3181 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
|
3182 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3183 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3184 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3185 size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3186 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3187 return using_class_space() ? class_vsm()->sum_used_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3188 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3189 return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3190 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3191 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3192 |
12235 | 3193 size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3194 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3195 return using_class_space() ? class_vsm()->sum_free_in_chunks_in_use() : 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3196 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3197 return vsm()->sum_free_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3198 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3199 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3200 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3201 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3202 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3203 // 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
|
3204 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3205 // is already counted in some chunk. |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3206 size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3207 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3208 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
|
3209 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3210 return vsm()->sum_capacity_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3211 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3212 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3213 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3214 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
|
3215 return used_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3216 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3217 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3218 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
|
3219 return capacity_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3220 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3221 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3222 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
|
3223 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3224 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 3225 // 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
|
3226 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6885 | 3227 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3228 // Dark matter. Too small for dictionary. | |
3229 #ifdef ASSERT | |
3230 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3231 #endif | |
3232 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3233 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3234 if (is_class && using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3235 class_vsm()->deallocate(ptr, word_size); |
6885 | 3236 } else { |
3237 vsm()->deallocate(ptr, word_size); | |
3238 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3239 } else { |
10191
601183f604b2
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10183
diff
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|
3240 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
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3241 |
6885 | 3242 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3243 // Dark matter. Too small for dictionary. | |
3244 #ifdef ASSERT | |
3245 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3246 #endif | |
3247 return; | |
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|
3248 } |
12056
740e263c80c6
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11966
diff
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|
3249 if (is_class && using_class_space()) { |
6885 | 3250 class_vsm()->deallocate(ptr, word_size); |
3251 } else { | |
3252 vsm()->deallocate(ptr, word_size); | |
3253 } | |
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|
3254 } |
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|
3255 } |
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|
3256 |
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3257 |
12902 | 3258 MetaWord* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
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3259 bool read_only, MetaspaceObj::Type type, TRAPS) { |
6725
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3260 if (HAS_PENDING_EXCEPTION) { |
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3261 assert(false, "Should not allocate with exception pending"); |
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|
3262 return NULL; // caller does a CHECK_NULL too |
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|
3263 } |
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|
3264 |
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|
3265 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
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3266 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
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3267 |
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3268 // Allocate in metaspaces without taking out a lock, because it deadlocks |
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|
3269 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
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|
3270 // to revisit this for application class data sharing. |
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|
3271 if (DumpSharedSpaces) { |
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3272 assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
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3273 Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
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3274 MetaWord* result = space->allocate(word_size, NonClassType); |
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3275 if (result == NULL) { |
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3276 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
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|
3277 } |
12902 | 3278 |
3279 space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); | |
3280 | |
3281 // Zero initialize. | |
3282 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3283 | |
3284 return result; | |
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|
3285 } |
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|
3286 |
12838
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|
3287 MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
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|
3288 |
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|
3289 // Try to allocate metadata. |
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|
3290 MetaWord* result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
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3291 |
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|
3292 if (result == NULL) { |
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|
3293 // Allocation failed. |
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|
3294 if (is_init_completed()) { |
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|
3295 // Only start a GC if the bootstrapping has completed. |
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|
3296 |
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|
3297 // Try to clean out some memory and retry. |
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|
3298 result = Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
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|
3299 loader_data, word_size, mdtype); |
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|
3300 } |
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|
3301 } |
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|
3302 |
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|
3303 if (result == NULL) { |
12838
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|
3304 report_metadata_oome(loader_data, word_size, mdtype, THREAD); |
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3305 // Will not reach here. |
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|
3306 return NULL; |
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|
3307 } |
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|
3308 |
12902 | 3309 // Zero initialize. |
3310 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3311 | |
3312 return result; | |
12838
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|
3313 } |
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|
3314 |
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|
3315 void Metaspace::report_metadata_oome(ClassLoaderData* loader_data, size_t word_size, MetadataType mdtype, TRAPS) { |
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3316 // If result is still null, we are out of memory. |
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|
3317 if (Verbose && TraceMetadataChunkAllocation) { |
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|
3318 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
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|
3319 SIZE_FORMAT, word_size); |
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|
3320 if (loader_data->metaspace_or_null() != NULL) { |
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|
3321 loader_data->dump(gclog_or_tty); |
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|
3322 } |
12838
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|
3323 MetaspaceAux::dump(gclog_or_tty); |
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|
3324 } |
12838
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|
3325 |
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|
3326 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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|
3327 const char* space_string = is_class_space_allocation(mdtype) ? "Compressed class space" : |
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|
3328 "Metadata space"; |
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|
3329 report_java_out_of_memory(space_string); |
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|
3330 |
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|
3331 if (JvmtiExport::should_post_resource_exhausted()) { |
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|
3332 JvmtiExport::post_resource_exhausted( |
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|
3333 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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|
3334 space_string); |
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|
3335 } |
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|
3336 |
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|
3337 if (!is_init_completed()) { |
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|
3338 vm_exit_during_initialization("OutOfMemoryError", space_string); |
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|
3339 } |
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|
3340 |
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|
3341 if (is_class_space_allocation(mdtype)) { |
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|
3342 THROW_OOP(Universe::out_of_memory_error_class_metaspace()); |
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|
3343 } else { |
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|
3344 THROW_OOP(Universe::out_of_memory_error_metaspace()); |
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3345 } |
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|
3346 } |
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3347 |
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3348 void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
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3349 assert(DumpSharedSpaces, "sanity"); |
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|
3350 |
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3351 AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
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3352 if (_alloc_record_head == NULL) { |
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3353 _alloc_record_head = _alloc_record_tail = rec; |
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3354 } else { |
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|
3355 _alloc_record_tail->_next = rec; |
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|
3356 _alloc_record_tail = rec; |
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|
3357 } |
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|
3358 } |
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|
3359 |
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|
3360 void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
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3361 assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
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|
3362 |
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|
3363 address last_addr = (address)bottom(); |
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|
3364 |
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|
3365 for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
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|
3366 address ptr = rec->_ptr; |
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|
3367 if (last_addr < ptr) { |
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|
3368 closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
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|
3369 } |
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|
3370 closure->doit(ptr, rec->_type, rec->_byte_size); |
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|
3371 last_addr = ptr + rec->_byte_size; |
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|
3372 } |
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|
3373 |
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|
3374 address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
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|
3375 if (last_addr < top) { |
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|
3376 closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
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3377 } |
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|
3378 } |
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3379 |
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3380 void Metaspace::purge(MetadataType mdtype) { |
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3381 get_space_list(mdtype)->purge(get_chunk_manager(mdtype)); |
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3382 } |
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3383 |
10175 | 3384 void Metaspace::purge() { |
3385 MutexLockerEx cl(SpaceManager::expand_lock(), | |
3386 Mutex::_no_safepoint_check_flag); | |
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3387 purge(NonClassType); |
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3388 if (using_class_space()) { |
12303
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3389 purge(ClassType); |
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3390 } |
10175 | 3391 } |
3392 | |
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3393 void Metaspace::print_on(outputStream* out) const { |
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3394 // Print both class virtual space counts and metaspace. |
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|
3395 if (Verbose) { |
12056
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|
3396 vsm()->print_on(out); |
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3397 if (using_class_space()) { |
6725
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3398 class_vsm()->print_on(out); |
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3399 } |
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3400 } |
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|
3401 } |
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3402 |
7176
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|
3403 bool Metaspace::contains(const void * ptr) { |
6725
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3404 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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3405 return true; |
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|
3406 } |
7176
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3407 // This is checked while unlocked. As long as the virtualspaces are added |
59c790074993
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3408 // at the end, the pointer will be in one of them. The virtual spaces |
59c790074993
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3409 // aren't deleted presently. When they are, some sort of locking might |
59c790074993
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3410 // be needed. Note, locking this can cause inversion problems with the |
59c790074993
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3411 // caller in MetaspaceObj::is_metadata() function. |
10175 | 3412 return space_list()->contains(ptr) || |
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3413 (using_class_space() && class_space_list()->contains(ptr)); |
6725
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3414 } |
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|
3415 |
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|
3416 void Metaspace::verify() { |
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|
3417 vsm()->verify(); |
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|
3418 if (using_class_space()) { |
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|
3419 class_vsm()->verify(); |
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|
3420 } |
6725
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|
3421 } |
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|
3422 |
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|
3423 void Metaspace::dump(outputStream* const out) const { |
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|
3424 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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|
3425 vsm()->dump(out); |
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changeset
|
3426 if (using_class_space()) { |
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|
3427 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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|
3428 class_vsm()->dump(out); |
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|
3429 } |
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|
3430 } |
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3431 |
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3432 /////////////// Unit tests /////////////// |
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3433 |
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3434 #ifndef PRODUCT |
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3435 |
12306
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3436 class TestMetaspaceAuxTest : AllStatic { |
12236
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3437 public: |
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|
3438 static void test_reserved() { |
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3439 size_t reserved = MetaspaceAux::reserved_bytes(); |
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3440 |
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|
3441 assert(reserved > 0, "assert"); |
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3442 |
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3443 size_t committed = MetaspaceAux::committed_bytes(); |
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3444 assert(committed <= reserved, "assert"); |
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3445 |
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3446 size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
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|
3447 assert(reserved_metadata > 0, "assert"); |
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|
3448 assert(reserved_metadata <= reserved, "assert"); |
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|
3449 |
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|
3450 if (UseCompressedClassPointers) { |
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|
3451 size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
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3452 assert(reserved_class > 0, "assert"); |
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|
3453 assert(reserved_class < reserved, "assert"); |
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|
3454 } |
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|
3455 } |
c4c768305a8f
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|
3456 |
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|
3457 static void test_committed() { |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
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changeset
|
3458 size_t committed = MetaspaceAux::committed_bytes(); |
c4c768305a8f
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|
3459 |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
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|
3460 assert(committed > 0, "assert"); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
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|
3461 |
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|
3462 size_t reserved = MetaspaceAux::reserved_bytes(); |
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|
3463 assert(committed <= reserved, "assert"); |
c4c768305a8f
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|
3464 |
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|
3465 size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
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|
3466 assert(committed_metadata > 0, "assert"); |
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8024638: Count and expose the amount of committed memory in the metaspaces
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|
3467 assert(committed_metadata <= committed, "assert"); |
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|
3468 |
c4c768305a8f
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|
3469 if (UseCompressedClassPointers) { |
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|
3470 size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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|
3471 assert(committed_class > 0, "assert"); |
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|
3472 assert(committed_class < committed, "assert"); |
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|
3473 } |
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|
3474 } |
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|
3475 |
12306
03f493ce3a71
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brutisso
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|
3476 static void test_virtual_space_list_large_chunk() { |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
brutisso
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|
3477 VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity()); |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
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|
3478 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
brutisso
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diff
changeset
|
3479 // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be |
03f493ce3a71
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brutisso
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diff
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|
3480 // vm_allocation_granularity aligned on Windows. |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
brutisso
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12303
diff
changeset
|
3481 size_t large_size = (size_t)(2*256*K + (os::vm_page_size()/BytesPerWord)); |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
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diff
changeset
|
3482 large_size += (os::vm_page_size()/BytesPerWord); |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
brutisso
parents:
12303
diff
changeset
|
3483 vs_list->get_new_chunk(large_size, large_size, 0); |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
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|
3484 } |
03f493ce3a71
8025228: assert(new_entry->reserved_words() == vs_word_size) fails in nightly
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|
3485 |
12236
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|
3486 static void test() { |
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|
3487 test_reserved(); |
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|
3488 test_committed(); |
12306
03f493ce3a71
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|
3489 test_virtual_space_list_large_chunk(); |
12236
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|
3490 } |
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|
3491 }; |
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|
3492 |
12306
03f493ce3a71
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changeset
|
3493 void TestMetaspaceAux_test() { |
03f493ce3a71
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|
3494 TestMetaspaceAuxTest::test(); |
12236
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|
3495 } |
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|
3496 |
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|
3497 #endif |