Mercurial > hg > truffle
annotate src/share/vm/memory/metaspace.cpp @ 12902:bdfbb1fb19ca
8026391: The Metachunk header wastes memory
Reviewed-by: coleenp, jmasa
author | stefank |
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date | Tue, 15 Oct 2013 14:28:51 +0200 |
parents | a6414751d537 |
children | 94c0343b1887 |
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; | |
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52 // Set this constant to enable slow integrity checking of the free chunk lists | |
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53 const bool metaspace_slow_verify = false; |
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54 |
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55 // Parameters for stress mode testing |
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56 const uint metadata_deallocate_a_lot_block = 10; |
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57 const uint metadata_deallocate_a_lock_chunk = 3; |
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58 size_t const allocation_from_dictionary_limit = 4 * K; |
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59 |
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60 MetaWord* last_allocated = 0; |
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61 |
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62 size_t Metaspace::_class_metaspace_size; |
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63 |
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64 // Used in declarations in SpaceManager and ChunkManager |
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65 enum ChunkIndex { |
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66 ZeroIndex = 0, |
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67 SpecializedIndex = ZeroIndex, |
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68 SmallIndex = SpecializedIndex + 1, |
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69 MediumIndex = SmallIndex + 1, |
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70 HumongousIndex = MediumIndex + 1, |
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71 NumberOfFreeLists = 3, |
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72 NumberOfInUseLists = 4 |
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73 }; |
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74 |
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75 enum ChunkSizes { // in words. |
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76 ClassSpecializedChunk = 128, |
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77 SpecializedChunk = 128, |
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78 ClassSmallChunk = 256, |
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79 SmallChunk = 512, |
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80 ClassMediumChunk = 4 * K, |
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81 MediumChunk = 8 * K, |
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82 HumongousChunkGranularity = 8 |
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83 }; |
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84 |
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85 static ChunkIndex next_chunk_index(ChunkIndex i) { |
6885 | 86 assert(i < NumberOfInUseLists, "Out of bound"); |
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87 return (ChunkIndex) (i+1); |
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88 } |
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89 |
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90 volatile intptr_t MetaspaceGC::_capacity_until_GC = 0; |
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91 uint MetaspaceGC::_shrink_factor = 0; |
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92 bool MetaspaceGC::_should_concurrent_collect = false; |
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93 |
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94 typedef class FreeList<Metachunk> ChunkList; |
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95 |
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96 // Manages the global free lists of chunks. |
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97 class ChunkManager : public CHeapObj<mtInternal> { |
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98 |
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99 // Free list of chunks of different sizes. |
10175 | 100 // SpecializedChunk |
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101 // SmallChunk |
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102 // MediumChunk |
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103 // HumongousChunk |
6885 | 104 ChunkList _free_chunks[NumberOfFreeLists]; |
105 | |
106 // HumongousChunk | |
107 ChunkTreeDictionary _humongous_dictionary; | |
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108 |
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109 // ChunkManager in all lists of this type |
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110 size_t _free_chunks_total; |
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111 size_t _free_chunks_count; |
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112 |
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113 void dec_free_chunks_total(size_t v) { |
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114 assert(_free_chunks_count > 0 && |
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115 _free_chunks_total > 0, |
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116 "About to go negative"); |
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117 Atomic::add_ptr(-1, &_free_chunks_count); |
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118 jlong minus_v = (jlong) - (jlong) v; |
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119 Atomic::add_ptr(minus_v, &_free_chunks_total); |
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120 } |
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121 |
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122 // Debug support |
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123 |
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124 size_t sum_free_chunks(); |
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125 size_t sum_free_chunks_count(); |
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126 |
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127 void locked_verify_free_chunks_total(); |
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128 void slow_locked_verify_free_chunks_total() { |
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129 if (metaspace_slow_verify) { |
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130 locked_verify_free_chunks_total(); |
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131 } |
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132 } |
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133 void locked_verify_free_chunks_count(); |
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134 void slow_locked_verify_free_chunks_count() { |
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135 if (metaspace_slow_verify) { |
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136 locked_verify_free_chunks_count(); |
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137 } |
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138 } |
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139 void verify_free_chunks_count(); |
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140 |
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141 public: |
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142 |
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143 ChunkManager(size_t specialized_size, size_t small_size, size_t medium_size) |
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144 : _free_chunks_total(0), _free_chunks_count(0) { |
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145 _free_chunks[SpecializedIndex].set_size(specialized_size); |
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146 _free_chunks[SmallIndex].set_size(small_size); |
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147 _free_chunks[MediumIndex].set_size(medium_size); |
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148 } |
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149 |
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150 // add or delete (return) a chunk to the global freelist. |
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151 Metachunk* chunk_freelist_allocate(size_t word_size); |
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152 void chunk_freelist_deallocate(Metachunk* chunk); |
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153 |
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154 // Map a size to a list index assuming that there are lists |
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155 // for special, small, medium, and humongous chunks. |
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156 static ChunkIndex list_index(size_t size); |
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157 |
10175 | 158 // Remove the chunk from its freelist. It is |
159 // expected to be on one of the _free_chunks[] lists. | |
160 void remove_chunk(Metachunk* chunk); | |
161 | |
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162 // Add the simple linked list of chunks to the freelist of chunks |
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163 // of type index. |
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164 void return_chunks(ChunkIndex index, Metachunk* chunks); |
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165 |
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166 // Total of the space in the free chunks list |
12235 | 167 size_t free_chunks_total_words(); |
168 size_t free_chunks_total_bytes(); | |
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169 |
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170 // Number of chunks in the free chunks list |
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171 size_t free_chunks_count(); |
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172 |
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173 void inc_free_chunks_total(size_t v, size_t count = 1) { |
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174 Atomic::add_ptr(count, &_free_chunks_count); |
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175 Atomic::add_ptr(v, &_free_chunks_total); |
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176 } |
6885 | 177 ChunkTreeDictionary* humongous_dictionary() { |
178 return &_humongous_dictionary; | |
179 } | |
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180 |
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181 ChunkList* free_chunks(ChunkIndex index); |
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182 |
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183 // Returns the list for the given chunk word size. |
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184 ChunkList* find_free_chunks_list(size_t word_size); |
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185 |
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186 // Add and remove from a list by size. Selects |
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187 // list based on size of chunk. |
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188 void free_chunks_put(Metachunk* chuck); |
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189 Metachunk* free_chunks_get(size_t chunk_word_size); |
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190 |
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191 // Debug support |
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192 void verify(); |
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193 void slow_verify() { |
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194 if (metaspace_slow_verify) { |
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195 verify(); |
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196 } |
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197 } |
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198 void locked_verify(); |
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199 void slow_locked_verify() { |
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200 if (metaspace_slow_verify) { |
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201 locked_verify(); |
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202 } |
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203 } |
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204 void verify_free_chunks_total(); |
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205 |
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206 void locked_print_free_chunks(outputStream* st); |
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207 void locked_print_sum_free_chunks(outputStream* st); |
6885 | 208 |
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209 void print_on(outputStream* st) const; |
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210 }; |
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211 |
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212 // Used to manage the free list of Metablocks (a block corresponds |
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213 // to the allocation of a quantum of metadata). |
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214 class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
6885 | 215 BlockTreeDictionary* _dictionary; |
216 | |
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217 // Only allocate and split from freelist if the size of the allocation |
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218 // is at least 1/4th the size of the available block. |
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219 const static int WasteMultiplier = 4; |
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220 |
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221 // Accessors |
6885 | 222 BlockTreeDictionary* dictionary() const { return _dictionary; } |
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223 |
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224 public: |
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225 BlockFreelist(); |
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226 ~BlockFreelist(); |
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227 |
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228 // Get and return a block to the free list |
6885 | 229 MetaWord* get_block(size_t word_size); |
230 void return_block(MetaWord* p, size_t word_size); | |
231 | |
232 size_t total_size() { | |
233 if (dictionary() == NULL) { | |
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234 return 0; |
6885 | 235 } else { |
236 return dictionary()->total_size(); | |
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237 } |
6885 | 238 } |
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239 |
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240 void print_on(outputStream* st) const; |
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241 }; |
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242 |
12902 | 243 // A VirtualSpaceList node. |
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244 class VirtualSpaceNode : public CHeapObj<mtClass> { |
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245 friend class VirtualSpaceList; |
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246 |
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247 // Link to next VirtualSpaceNode |
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248 VirtualSpaceNode* _next; |
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249 |
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250 // total in the VirtualSpace |
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251 MemRegion _reserved; |
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252 ReservedSpace _rs; |
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253 VirtualSpace _virtual_space; |
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254 MetaWord* _top; |
10175 | 255 // count of chunks contained in this VirtualSpace |
256 uintx _container_count; | |
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257 |
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258 // Convenience functions to access the _virtual_space |
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259 char* low() const { return virtual_space()->low(); } |
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260 char* high() const { return virtual_space()->high(); } |
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261 |
10175 | 262 // The first Metachunk will be allocated at the bottom of the |
263 // VirtualSpace | |
264 Metachunk* first_chunk() { return (Metachunk*) bottom(); } | |
265 | |
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266 public: |
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267 |
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268 VirtualSpaceNode(size_t byte_size); |
10175 | 269 VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
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270 ~VirtualSpaceNode(); |
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271 |
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272 // Convenience functions for logical bottom and end |
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273 MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
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274 MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
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275 |
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276 size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
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277 size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
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278 |
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279 bool is_pre_committed() const { return _virtual_space.special(); } |
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280 |
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281 // address of next available space in _virtual_space; |
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282 // Accessors |
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283 VirtualSpaceNode* next() { return _next; } |
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284 void set_next(VirtualSpaceNode* v) { _next = v; } |
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285 |
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286 void set_reserved(MemRegion const v) { _reserved = v; } |
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287 void set_top(MetaWord* v) { _top = v; } |
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288 |
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289 // Accessors |
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290 MemRegion* reserved() { return &_reserved; } |
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291 VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
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292 |
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293 // Returns true if "word_size" is available in the VirtualSpace |
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294 bool is_available(size_t word_size) { return _top + word_size <= end(); } |
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295 |
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296 MetaWord* top() const { return _top; } |
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297 void inc_top(size_t word_size) { _top += word_size; } |
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298 |
10175 | 299 uintx container_count() { return _container_count; } |
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300 void inc_container_count(); |
10175 | 301 void dec_container_count(); |
302 #ifdef ASSERT | |
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303 uint container_count_slow(); |
10175 | 304 void verify_container_count(); |
305 #endif | |
306 | |
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307 // used and capacity in this single entry in the list |
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308 size_t used_words_in_vs() const; |
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309 size_t capacity_words_in_vs() const; |
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310 size_t free_words_in_vs() const; |
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311 |
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312 bool initialize(); |
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313 |
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314 // get space from the virtual space |
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315 Metachunk* take_from_committed(size_t chunk_word_size); |
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316 |
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317 // Allocate a chunk from the virtual space and return it. |
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318 Metachunk* get_chunk_vs(size_t chunk_word_size); |
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319 |
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320 // Expands/shrinks the committed space in a virtual space. Delegates |
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321 // to Virtualspace |
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322 bool expand_by(size_t min_words, size_t preferred_words); |
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323 |
10175 | 324 // In preparation for deleting this node, remove all the chunks |
325 // in the node from any freelist. | |
326 void purge(ChunkManager* chunk_manager); | |
327 | |
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328 #ifdef ASSERT |
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329 // Debug support |
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330 void mangle(); |
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331 #endif |
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332 |
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333 void print_on(outputStream* st) const; |
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334 }; |
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335 |
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336 #define assert_is_ptr_aligned(ptr, alignment) \ |
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337 assert(is_ptr_aligned(ptr, alignment), \ |
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338 err_msg(PTR_FORMAT " is not aligned to " \ |
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339 SIZE_FORMAT, ptr, alignment)) |
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340 |
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341 #define assert_is_size_aligned(size, alignment) \ |
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342 assert(is_size_aligned(size, alignment), \ |
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343 err_msg(SIZE_FORMAT " is not aligned to " \ |
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344 SIZE_FORMAT, size, alignment)) |
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345 |
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346 |
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347 // Decide if large pages should be committed when the memory is reserved. |
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348 static bool should_commit_large_pages_when_reserving(size_t bytes) { |
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349 if (UseLargePages && UseLargePagesInMetaspace && !os::can_commit_large_page_memory()) { |
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350 size_t words = bytes / BytesPerWord; |
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351 bool is_class = false; // We never reserve large pages for the class space. |
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352 if (MetaspaceGC::can_expand(words, is_class) && |
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353 MetaspaceGC::allowed_expansion() >= words) { |
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354 return true; |
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355 } |
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356 } |
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357 |
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358 return false; |
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359 } |
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360 |
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361 // byte_size is the size of the associated virtualspace. |
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362 VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
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363 assert_is_size_aligned(bytes, Metaspace::reserve_alignment()); |
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364 |
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365 // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
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366 // configurable address, generally at the top of the Java heap so other |
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367 // memory addresses don't conflict. |
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368 if (DumpSharedSpaces) { |
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369 bool large_pages = false; // No large pages when dumping the CDS archive. |
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370 char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment()); |
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371 |
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372 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base, 0); |
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373 if (_rs.is_reserved()) { |
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374 assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
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375 } else { |
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376 // Get a mmap region anywhere if the SharedBaseAddress fails. |
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377 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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378 } |
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379 MetaspaceShared::set_shared_rs(&_rs); |
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380 } else { |
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381 bool large_pages = should_commit_large_pages_when_reserving(bytes); |
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382 |
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383 _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
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384 } |
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385 |
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386 if (_rs.is_reserved()) { |
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387 assert(_rs.base() != NULL, "Catch if we get a NULL address"); |
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388 assert(_rs.size() != 0, "Catch if we get a 0 size"); |
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389 assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment()); |
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390 assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment()); |
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391 |
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392 MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
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393 } |
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394 } |
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395 |
10175 | 396 void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
397 Metachunk* chunk = first_chunk(); | |
398 Metachunk* invalid_chunk = (Metachunk*) top(); | |
399 while (chunk < invalid_chunk ) { | |
12902 | 400 assert(chunk->is_tagged_free(), "Should be tagged free"); |
401 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
402 chunk_manager->remove_chunk(chunk); | |
403 assert(chunk->next() == NULL && | |
404 chunk->prev() == NULL, | |
405 "Was not removed from its list"); | |
406 chunk = (Metachunk*) next; | |
10175 | 407 } |
408 } | |
409 | |
410 #ifdef ASSERT | |
411 uint VirtualSpaceNode::container_count_slow() { | |
412 uint count = 0; | |
413 Metachunk* chunk = first_chunk(); | |
414 Metachunk* invalid_chunk = (Metachunk*) top(); | |
415 while (chunk < invalid_chunk ) { | |
416 MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); | |
417 // Don't count the chunks on the free lists. Those are | |
418 // still part of the VirtualSpaceNode but not currently | |
419 // counted. | |
12902 | 420 if (!chunk->is_tagged_free()) { |
10175 | 421 count++; |
422 } | |
423 chunk = (Metachunk*) next; | |
424 } | |
425 return count; | |
426 } | |
427 #endif | |
428 | |
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429 // List of VirtualSpaces for metadata allocation. |
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430 class VirtualSpaceList : public CHeapObj<mtClass> { |
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431 friend class VirtualSpaceNode; |
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432 |
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433 enum VirtualSpaceSizes { |
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434 VirtualSpaceSize = 256 * K |
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435 }; |
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436 |
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437 // Head of the list |
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438 VirtualSpaceNode* _virtual_space_list; |
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439 // virtual space currently being used for allocations |
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440 VirtualSpaceNode* _current_virtual_space; |
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441 |
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442 // Is this VirtualSpaceList used for the compressed class space |
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443 bool _is_class; |
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444 |
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445 // Sum of reserved and committed memory in the virtual spaces |
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446 size_t _reserved_words; |
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447 size_t _committed_words; |
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448 |
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449 // Number of virtual spaces |
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450 size_t _virtual_space_count; |
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451 |
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452 ~VirtualSpaceList(); |
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453 |
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454 VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
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455 |
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456 void set_virtual_space_list(VirtualSpaceNode* v) { |
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457 _virtual_space_list = v; |
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458 } |
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459 void set_current_virtual_space(VirtualSpaceNode* v) { |
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460 _current_virtual_space = v; |
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461 } |
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462 |
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463 void link_vs(VirtualSpaceNode* new_entry); |
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464 |
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465 // Get another virtual space and add it to the list. This |
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466 // is typically prompted by a failed attempt to allocate a chunk |
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467 // and is typically followed by the allocation of a chunk. |
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468 bool create_new_virtual_space(size_t vs_word_size); |
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469 |
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470 public: |
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471 VirtualSpaceList(size_t word_size); |
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472 VirtualSpaceList(ReservedSpace rs); |
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473 |
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474 size_t free_bytes(); |
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475 |
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476 Metachunk* get_new_chunk(size_t word_size, |
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477 size_t grow_chunks_by_words, |
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478 size_t medium_chunk_bunch); |
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479 |
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480 bool expand_node_by(VirtualSpaceNode* node, |
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481 size_t min_words, |
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482 size_t preferred_words); |
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483 |
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484 bool expand_by(size_t min_words, |
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485 size_t preferred_words); |
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486 |
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487 VirtualSpaceNode* current_virtual_space() { |
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488 return _current_virtual_space; |
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489 } |
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490 |
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491 bool is_class() const { return _is_class; } |
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492 |
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493 bool initialization_succeeded() { return _virtual_space_list != NULL; } |
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494 |
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495 size_t reserved_words() { return _reserved_words; } |
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496 size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
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497 size_t committed_words() { return _committed_words; } |
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498 size_t committed_bytes() { return committed_words() * BytesPerWord; } |
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499 |
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500 void inc_reserved_words(size_t v); |
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501 void dec_reserved_words(size_t v); |
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502 void inc_committed_words(size_t v); |
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503 void dec_committed_words(size_t v); |
10175 | 504 void inc_virtual_space_count(); |
505 void dec_virtual_space_count(); | |
506 | |
507 // Unlink empty VirtualSpaceNodes and free it. | |
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508 void purge(ChunkManager* chunk_manager); |
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509 |
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510 bool contains(const void *ptr); |
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511 |
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512 void print_on(outputStream* st) const; |
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513 |
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514 class VirtualSpaceListIterator : public StackObj { |
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515 VirtualSpaceNode* _virtual_spaces; |
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516 public: |
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517 VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
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518 _virtual_spaces(virtual_spaces) {} |
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519 |
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520 bool repeat() { |
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521 return _virtual_spaces != NULL; |
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522 } |
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523 |
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524 VirtualSpaceNode* get_next() { |
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525 VirtualSpaceNode* result = _virtual_spaces; |
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526 if (_virtual_spaces != NULL) { |
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527 _virtual_spaces = _virtual_spaces->next(); |
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528 } |
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529 return result; |
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530 } |
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531 }; |
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532 }; |
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533 |
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534 class Metadebug : AllStatic { |
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535 // Debugging support for Metaspaces |
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536 static int _deallocate_block_a_lot_count; |
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537 static int _deallocate_chunk_a_lot_count; |
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538 static int _allocation_fail_alot_count; |
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539 |
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540 public: |
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541 static int deallocate_block_a_lot_count() { |
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542 return _deallocate_block_a_lot_count; |
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543 } |
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544 static void set_deallocate_block_a_lot_count(int v) { |
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545 _deallocate_block_a_lot_count = v; |
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546 } |
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547 static void inc_deallocate_block_a_lot_count() { |
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548 _deallocate_block_a_lot_count++; |
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549 } |
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550 static int deallocate_chunk_a_lot_count() { |
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551 return _deallocate_chunk_a_lot_count; |
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552 } |
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553 static void reset_deallocate_chunk_a_lot_count() { |
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554 _deallocate_chunk_a_lot_count = 1; |
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555 } |
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556 static void inc_deallocate_chunk_a_lot_count() { |
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557 _deallocate_chunk_a_lot_count++; |
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558 } |
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559 |
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560 static void init_allocation_fail_alot_count(); |
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561 #ifdef ASSERT |
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562 static bool test_metadata_failure(); |
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563 #endif |
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564 |
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565 static void deallocate_chunk_a_lot(SpaceManager* sm, |
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566 size_t chunk_word_size); |
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567 static void deallocate_block_a_lot(SpaceManager* sm, |
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568 size_t chunk_word_size); |
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569 |
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570 }; |
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571 |
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572 int Metadebug::_deallocate_block_a_lot_count = 0; |
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573 int Metadebug::_deallocate_chunk_a_lot_count = 0; |
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574 int Metadebug::_allocation_fail_alot_count = 0; |
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575 |
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576 // SpaceManager - used by Metaspace to handle allocations |
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577 class SpaceManager : public CHeapObj<mtClass> { |
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578 friend class Metaspace; |
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579 friend class Metadebug; |
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580 |
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581 private: |
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582 |
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583 // protects allocations and contains. |
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584 Mutex* const _lock; |
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585 |
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586 // Type of metadata allocated. |
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587 Metaspace::MetadataType _mdtype; |
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588 |
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589 // List of chunks in use by this SpaceManager. Allocations |
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590 // are done from the current chunk. The list is used for deallocating |
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591 // chunks when the SpaceManager is freed. |
6885 | 592 Metachunk* _chunks_in_use[NumberOfInUseLists]; |
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593 Metachunk* _current_chunk; |
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594 |
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595 // Number of small chunks to allocate to a manager |
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596 // If class space manager, small chunks are unlimited |
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597 static uint const _small_chunk_limit; |
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598 |
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599 // Sum of all space in allocated chunks |
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600 size_t _allocated_blocks_words; |
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601 |
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602 // Sum of all allocated chunks |
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603 size_t _allocated_chunks_words; |
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604 size_t _allocated_chunks_count; |
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605 |
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606 // Free lists of blocks are per SpaceManager since they |
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607 // are assumed to be in chunks in use by the SpaceManager |
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608 // and all chunks in use by a SpaceManager are freed when |
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609 // the class loader using the SpaceManager is collected. |
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610 BlockFreelist _block_freelists; |
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611 |
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612 // protects virtualspace and chunk expansions |
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613 static const char* _expand_lock_name; |
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614 static const int _expand_lock_rank; |
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615 static Mutex* const _expand_lock; |
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616 |
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617 private: |
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618 // Accessors |
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619 Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
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620 void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
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621 |
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622 BlockFreelist* block_freelists() const { |
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623 return (BlockFreelist*) &_block_freelists; |
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624 } |
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625 |
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626 Metaspace::MetadataType mdtype() { return _mdtype; } |
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627 |
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628 VirtualSpaceList* vs_list() const { return Metaspace::get_space_list(_mdtype); } |
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629 ChunkManager* chunk_manager() const { return Metaspace::get_chunk_manager(_mdtype); } |
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630 |
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631 Metachunk* current_chunk() const { return _current_chunk; } |
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632 void set_current_chunk(Metachunk* v) { |
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633 _current_chunk = v; |
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634 } |
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635 |
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636 Metachunk* find_current_chunk(size_t word_size); |
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637 |
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638 // Add chunk to the list of chunks in use |
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639 void add_chunk(Metachunk* v, bool make_current); |
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640 void retire_current_chunk(); |
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641 |
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642 Mutex* lock() const { return _lock; } |
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643 |
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644 const char* chunk_size_name(ChunkIndex index) const; |
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645 |
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646 protected: |
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647 void initialize(); |
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648 |
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649 public: |
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650 SpaceManager(Metaspace::MetadataType mdtype, |
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651 Mutex* lock); |
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652 ~SpaceManager(); |
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653 |
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654 enum ChunkMultiples { |
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655 MediumChunkMultiple = 4 |
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656 }; |
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657 |
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658 bool is_class() { return _mdtype == Metaspace::ClassType; } |
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659 |
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660 // Accessors |
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661 size_t specialized_chunk_size() { return SpecializedChunk; } |
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662 size_t small_chunk_size() { return (size_t) is_class() ? ClassSmallChunk : SmallChunk; } |
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663 size_t medium_chunk_size() { return (size_t) is_class() ? ClassMediumChunk : MediumChunk; } |
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664 size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
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665 |
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666 size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
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667 size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
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668 size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
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669 size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
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670 |
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671 bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
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672 |
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673 static Mutex* expand_lock() { return _expand_lock; } |
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674 |
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675 // Increment the per Metaspace and global running sums for Metachunks |
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676 // by the given size. This is used when a Metachunk to added to |
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677 // the in-use list. |
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678 void inc_size_metrics(size_t words); |
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679 // Increment the per Metaspace and global running sums Metablocks by the given |
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680 // size. This is used when a Metablock is allocated. |
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681 void inc_used_metrics(size_t words); |
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682 // Delete the portion of the running sums for this SpaceManager. That is, |
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683 // the globals running sums for the Metachunks and Metablocks are |
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684 // decremented for all the Metachunks in-use by this SpaceManager. |
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685 void dec_total_from_size_metrics(); |
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686 |
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687 // Set the sizes for the initial chunks. |
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688 void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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689 size_t* chunk_word_size, |
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690 size_t* class_chunk_word_size); |
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691 |
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692 size_t sum_capacity_in_chunks_in_use() const; |
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693 size_t sum_used_in_chunks_in_use() const; |
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694 size_t sum_free_in_chunks_in_use() const; |
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695 size_t sum_waste_in_chunks_in_use() const; |
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696 size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
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697 |
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698 size_t sum_count_in_chunks_in_use(); |
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699 size_t sum_count_in_chunks_in_use(ChunkIndex i); |
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700 |
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701 Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
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702 |
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703 // Block allocation and deallocation. |
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704 // Allocates a block from the current chunk |
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705 MetaWord* allocate(size_t word_size); |
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706 |
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707 // Helper for allocations |
6885 | 708 MetaWord* allocate_work(size_t word_size); |
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709 |
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710 // Returns a block to the per manager freelist |
6885 | 711 void deallocate(MetaWord* p, size_t word_size); |
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712 |
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713 // Based on the allocation size and a minimum chunk size, |
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714 // returned chunk size (for expanding space for chunk allocation). |
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715 size_t calc_chunk_size(size_t allocation_word_size); |
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716 |
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717 // Called when an allocation from the current chunk fails. |
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718 // Gets a new chunk (may require getting a new virtual space), |
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719 // and allocates from that chunk. |
6885 | 720 MetaWord* grow_and_allocate(size_t word_size); |
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721 |
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722 // Notify memory usage to MemoryService. |
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723 void track_metaspace_memory_usage(); |
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724 |
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725 // debugging support. |
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726 |
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727 void dump(outputStream* const out) const; |
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728 void print_on(outputStream* st) const; |
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729 void locked_print_chunks_in_use_on(outputStream* st) const; |
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730 |
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731 void verify(); |
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732 void verify_chunk_size(Metachunk* chunk); |
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733 NOT_PRODUCT(void mangle_freed_chunks();) |
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734 #ifdef ASSERT |
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735 void verify_allocated_blocks_words(); |
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736 #endif |
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737 |
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738 size_t get_raw_word_size(size_t word_size) { |
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739 size_t byte_size = word_size * BytesPerWord; |
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740 |
12902 | 741 size_t raw_bytes_size = MAX2(byte_size, sizeof(Metablock)); |
742 raw_bytes_size = align_size_up(raw_bytes_size, Metachunk::object_alignment()); | |
743 | |
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744 size_t raw_word_size = raw_bytes_size / BytesPerWord; |
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745 assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
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746 |
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747 return raw_word_size; |
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748 } |
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749 }; |
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750 |
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751 uint const SpaceManager::_small_chunk_limit = 4; |
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752 |
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753 const char* SpaceManager::_expand_lock_name = |
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754 "SpaceManager chunk allocation lock"; |
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755 const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
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756 Mutex* const SpaceManager::_expand_lock = |
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757 new Mutex(SpaceManager::_expand_lock_rank, |
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758 SpaceManager::_expand_lock_name, |
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759 Mutex::_allow_vm_block_flag); |
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760 |
10175 | 761 void VirtualSpaceNode::inc_container_count() { |
762 assert_lock_strong(SpaceManager::expand_lock()); | |
763 _container_count++; | |
764 assert(_container_count == container_count_slow(), | |
765 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
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766 " container_count_slow() " SIZE_FORMAT, |
10175 | 767 _container_count, container_count_slow())); |
768 } | |
769 | |
770 void VirtualSpaceNode::dec_container_count() { | |
771 assert_lock_strong(SpaceManager::expand_lock()); | |
772 _container_count--; | |
773 } | |
774 | |
775 #ifdef ASSERT | |
776 void VirtualSpaceNode::verify_container_count() { | |
777 assert(_container_count == container_count_slow(), | |
778 err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT | |
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779 " container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); |
10175 | 780 } |
781 #endif | |
782 | |
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783 // BlockFreelist methods |
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784 |
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785 BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
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786 |
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787 BlockFreelist::~BlockFreelist() { |
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788 if (_dictionary != NULL) { |
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789 if (Verbose && TraceMetadataChunkAllocation) { |
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790 _dictionary->print_free_lists(gclog_or_tty); |
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791 } |
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792 delete _dictionary; |
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793 } |
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794 } |
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795 |
6885 | 796 void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
12902 | 797 Metablock* free_chunk = ::new (p) Metablock(word_size); |
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798 if (dictionary() == NULL) { |
6885 | 799 _dictionary = new BlockTreeDictionary(); |
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800 } |
6885 | 801 dictionary()->return_chunk(free_chunk); |
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802 } |
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803 |
6885 | 804 MetaWord* BlockFreelist::get_block(size_t word_size) { |
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805 if (dictionary() == NULL) { |
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806 return NULL; |
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807 } |
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808 |
6885 | 809 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
810 // Dark matter. Too small for dictionary. | |
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811 return NULL; |
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812 } |
6885 | 813 |
814 Metablock* free_block = | |
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815 dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
6885 | 816 if (free_block == NULL) { |
817 return NULL; | |
818 } | |
819 | |
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820 const size_t block_size = free_block->size(); |
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821 if (block_size > WasteMultiplier * word_size) { |
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822 return_block((MetaWord*)free_block, block_size); |
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823 return NULL; |
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824 } |
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825 |
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826 MetaWord* new_block = (MetaWord*)free_block; |
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827 assert(block_size >= word_size, "Incorrect size of block from freelist"); |
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828 const size_t unused = block_size - word_size; |
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829 if (unused >= TreeChunk<Metablock, FreeList>::min_size()) { |
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830 return_block(new_block + word_size, unused); |
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831 } |
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832 |
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833 return new_block; |
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834 } |
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835 |
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836 void BlockFreelist::print_on(outputStream* st) const { |
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837 if (dictionary() == NULL) { |
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838 return; |
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839 } |
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840 dictionary()->print_free_lists(st); |
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841 } |
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842 |
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843 // VirtualSpaceNode methods |
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844 |
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845 VirtualSpaceNode::~VirtualSpaceNode() { |
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846 _rs.release(); |
10175 | 847 #ifdef ASSERT |
848 size_t word_size = sizeof(*this) / BytesPerWord; | |
849 Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); | |
850 #endif | |
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851 } |
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852 |
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853 size_t VirtualSpaceNode::used_words_in_vs() const { |
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854 return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
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855 } |
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856 |
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857 // Space committed in the VirtualSpace |
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858 size_t VirtualSpaceNode::capacity_words_in_vs() const { |
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859 return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
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860 } |
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861 |
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862 size_t VirtualSpaceNode::free_words_in_vs() const { |
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863 return pointer_delta(end(), top(), sizeof(MetaWord)); |
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864 } |
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865 |
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866 // Allocates the chunk from the virtual space only. |
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867 // This interface is also used internally for debugging. Not all |
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868 // chunks removed here are necessarily used for allocation. |
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869 Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
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870 // Bottom of the new chunk |
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871 MetaWord* chunk_limit = top(); |
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872 assert(chunk_limit != NULL, "Not safe to call this method"); |
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873 |
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874 // The virtual spaces are always expanded by the |
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875 // commit granularity to enforce the following condition. |
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876 // Without this the is_available check will not work correctly. |
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877 assert(_virtual_space.committed_size() == _virtual_space.actual_committed_size(), |
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878 "The committed memory doesn't match the expanded memory."); |
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879 |
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880 if (!is_available(chunk_word_size)) { |
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881 if (TraceMetadataChunkAllocation) { |
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882 gclog_or_tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
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883 // Dump some information about the virtual space that is nearly full |
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884 print_on(gclog_or_tty); |
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885 } |
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886 return NULL; |
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887 } |
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888 |
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889 // Take the space (bump top on the current virtual space). |
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890 inc_top(chunk_word_size); |
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891 |
10175 | 892 // Initialize the chunk |
893 Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); | |
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894 return result; |
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895 } |
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896 |
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897 |
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898 // Expand the virtual space (commit more of the reserved space) |
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899 bool VirtualSpaceNode::expand_by(size_t min_words, size_t preferred_words) { |
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900 size_t min_bytes = min_words * BytesPerWord; |
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901 size_t preferred_bytes = preferred_words * BytesPerWord; |
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902 |
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903 size_t uncommitted = virtual_space()->reserved_size() - virtual_space()->actual_committed_size(); |
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904 |
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905 if (uncommitted < min_bytes) { |
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906 return false; |
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907 } |
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908 |
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909 size_t commit = MIN2(preferred_bytes, uncommitted); |
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910 bool result = virtual_space()->expand_by(commit, false); |
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911 |
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912 assert(result, "Failed to commit memory"); |
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913 |
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914 return result; |
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915 } |
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916 |
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917 Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
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918 assert_lock_strong(SpaceManager::expand_lock()); |
10175 | 919 Metachunk* result = take_from_committed(chunk_word_size); |
920 if (result != NULL) { | |
921 inc_container_count(); | |
922 } | |
923 return result; | |
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924 } |
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925 |
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926 bool VirtualSpaceNode::initialize() { |
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927 |
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928 if (!_rs.is_reserved()) { |
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929 return false; |
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930 } |
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931 |
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932 // These are necessary restriction to make sure that the virtual space always |
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933 // grows in steps of Metaspace::commit_alignment(). If both base and size are |
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934 // aligned only the middle alignment of the VirtualSpace is used. |
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935 assert_is_ptr_aligned(_rs.base(), Metaspace::commit_alignment()); |
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936 assert_is_size_aligned(_rs.size(), Metaspace::commit_alignment()); |
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937 |
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938 // ReservedSpaces marked as special will have the entire memory |
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939 // pre-committed. Setting a committed size will make sure that |
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940 // committed_size and actual_committed_size agrees. |
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941 size_t pre_committed_size = _rs.special() ? _rs.size() : 0; |
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942 |
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943 bool result = virtual_space()->initialize_with_granularity(_rs, pre_committed_size, |
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944 Metaspace::commit_alignment()); |
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945 if (result) { |
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946 assert(virtual_space()->committed_size() == virtual_space()->actual_committed_size(), |
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947 "Checking that the pre-committed memory was registered by the VirtualSpace"); |
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948 |
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949 set_top((MetaWord*)virtual_space()->low()); |
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950 set_reserved(MemRegion((HeapWord*)_rs.base(), |
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951 (HeapWord*)(_rs.base() + _rs.size()))); |
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952 |
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953 assert(reserved()->start() == (HeapWord*) _rs.base(), |
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954 err_msg("Reserved start was not set properly " PTR_FORMAT |
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955 " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
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956 assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
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957 err_msg("Reserved size was not set properly " SIZE_FORMAT |
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958 " != " SIZE_FORMAT, reserved()->word_size(), |
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959 _rs.size() / BytesPerWord)); |
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960 } |
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961 |
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962 return result; |
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963 } |
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964 |
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965 void VirtualSpaceNode::print_on(outputStream* st) const { |
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966 size_t used = used_words_in_vs(); |
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967 size_t capacity = capacity_words_in_vs(); |
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968 VirtualSpace* vs = virtual_space(); |
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969 st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
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970 "[" PTR_FORMAT ", " PTR_FORMAT ", " |
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971 PTR_FORMAT ", " PTR_FORMAT ")", |
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972 vs, capacity / K, |
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973 capacity == 0 ? 0 : used * 100 / capacity, |
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974 bottom(), top(), end(), |
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975 vs->high_boundary()); |
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976 } |
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977 |
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978 #ifdef ASSERT |
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979 void VirtualSpaceNode::mangle() { |
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980 size_t word_size = capacity_words_in_vs(); |
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981 Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
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982 } |
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983 #endif // ASSERT |
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984 |
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985 // VirtualSpaceList methods |
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986 // Space allocated from the VirtualSpace |
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987 |
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988 VirtualSpaceList::~VirtualSpaceList() { |
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989 VirtualSpaceListIterator iter(virtual_space_list()); |
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990 while (iter.repeat()) { |
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991 VirtualSpaceNode* vsl = iter.get_next(); |
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992 delete vsl; |
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993 } |
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994 } |
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995 |
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996 void VirtualSpaceList::inc_reserved_words(size_t v) { |
10175 | 997 assert_lock_strong(SpaceManager::expand_lock()); |
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998 _reserved_words = _reserved_words + v; |
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999 } |
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1000 void VirtualSpaceList::dec_reserved_words(size_t v) { |
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1001 assert_lock_strong(SpaceManager::expand_lock()); |
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1002 _reserved_words = _reserved_words - v; |
10175 | 1003 } |
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1004 |
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1005 #define assert_committed_below_limit() \ |
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1006 assert(MetaspaceAux::committed_bytes() <= MaxMetaspaceSize, \ |
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1007 err_msg("Too much committed memory. Committed: " SIZE_FORMAT \ |
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1008 " limit (MaxMetaspaceSize): " SIZE_FORMAT, \ |
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1009 MetaspaceAux::committed_bytes(), MaxMetaspaceSize)); |
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1010 |
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1011 void VirtualSpaceList::inc_committed_words(size_t v) { |
10175 | 1012 assert_lock_strong(SpaceManager::expand_lock()); |
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1013 _committed_words = _committed_words + v; |
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1014 |
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1015 assert_committed_below_limit(); |
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1016 } |
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1017 void VirtualSpaceList::dec_committed_words(size_t v) { |
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1018 assert_lock_strong(SpaceManager::expand_lock()); |
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1019 _committed_words = _committed_words - v; |
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1020 |
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1021 assert_committed_below_limit(); |
10175 | 1022 } |
1023 | |
1024 void VirtualSpaceList::inc_virtual_space_count() { | |
1025 assert_lock_strong(SpaceManager::expand_lock()); | |
1026 _virtual_space_count++; | |
1027 } | |
1028 void VirtualSpaceList::dec_virtual_space_count() { | |
1029 assert_lock_strong(SpaceManager::expand_lock()); | |
1030 _virtual_space_count--; | |
1031 } | |
1032 | |
1033 void ChunkManager::remove_chunk(Metachunk* chunk) { | |
1034 size_t word_size = chunk->word_size(); | |
1035 ChunkIndex index = list_index(word_size); | |
1036 if (index != HumongousIndex) { | |
1037 free_chunks(index)->remove_chunk(chunk); | |
1038 } else { | |
1039 humongous_dictionary()->remove_chunk(chunk); | |
1040 } | |
1041 | |
1042 // Chunk is being removed from the chunks free list. | |
12902 | 1043 dec_free_chunks_total(chunk->word_size()); |
10175 | 1044 } |
1045 | |
1046 // Walk the list of VirtualSpaceNodes and delete | |
1047 // nodes with a 0 container_count. Remove Metachunks in | |
1048 // the node from their respective freelists. | |
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1049 void VirtualSpaceList::purge(ChunkManager* chunk_manager) { |
10175 | 1050 assert_lock_strong(SpaceManager::expand_lock()); |
1051 // Don't use a VirtualSpaceListIterator because this | |
1052 // list is being changed and a straightforward use of an iterator is not safe. | |
1053 VirtualSpaceNode* purged_vsl = NULL; | |
1054 VirtualSpaceNode* prev_vsl = virtual_space_list(); | |
1055 VirtualSpaceNode* next_vsl = prev_vsl; | |
1056 while (next_vsl != NULL) { | |
1057 VirtualSpaceNode* vsl = next_vsl; | |
1058 next_vsl = vsl->next(); | |
1059 // Don't free the current virtual space since it will likely | |
1060 // be needed soon. | |
1061 if (vsl->container_count() == 0 && vsl != current_virtual_space()) { | |
1062 // Unlink it from the list | |
1063 if (prev_vsl == vsl) { | |
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1064 // This is the case of the current node being the first node. |
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1065 assert(vsl == virtual_space_list(), "Expected to be the first node"); |
10175 | 1066 set_virtual_space_list(vsl->next()); |
1067 } else { | |
1068 prev_vsl->set_next(vsl->next()); | |
1069 } | |
1070 | |
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1071 vsl->purge(chunk_manager); |
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1072 dec_reserved_words(vsl->reserved_words()); |
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1073 dec_committed_words(vsl->committed_words()); |
10175 | 1074 dec_virtual_space_count(); |
1075 purged_vsl = vsl; | |
1076 delete vsl; | |
1077 } else { | |
1078 prev_vsl = vsl; | |
1079 } | |
1080 } | |
1081 #ifdef ASSERT | |
1082 if (purged_vsl != NULL) { | |
1083 // List should be stable enough to use an iterator here. | |
1084 VirtualSpaceListIterator iter(virtual_space_list()); | |
1085 while (iter.repeat()) { | |
1086 VirtualSpaceNode* vsl = iter.get_next(); | |
1087 assert(vsl != purged_vsl, "Purge of vsl failed"); | |
1088 } | |
1089 } | |
1090 #endif | |
1091 } | |
1092 | |
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1093 VirtualSpaceList::VirtualSpaceList(size_t word_size) : |
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1094 _is_class(false), |
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1095 _virtual_space_list(NULL), |
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1096 _current_virtual_space(NULL), |
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1097 _reserved_words(0), |
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1098 _committed_words(0), |
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1099 _virtual_space_count(0) { |
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1100 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1101 Mutex::_no_safepoint_check_flag); |
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1102 create_new_virtual_space(word_size); |
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1103 } |
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1104 |
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1105 VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
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1106 _is_class(true), |
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1107 _virtual_space_list(NULL), |
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1108 _current_virtual_space(NULL), |
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1109 _reserved_words(0), |
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1110 _committed_words(0), |
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1111 _virtual_space_count(0) { |
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1112 MutexLockerEx cl(SpaceManager::expand_lock(), |
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1113 Mutex::_no_safepoint_check_flag); |
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1114 VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
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1115 bool succeeded = class_entry->initialize(); |
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1116 if (succeeded) { |
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1117 link_vs(class_entry); |
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1118 } |
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1119 } |
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1120 |
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1121 size_t VirtualSpaceList::free_bytes() { |
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1122 return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
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1123 } |
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1124 |
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1125 // Allocate another meta virtual space and add it to the list. |
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1126 bool VirtualSpaceList::create_new_virtual_space(size_t vs_word_size) { |
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1127 assert_lock_strong(SpaceManager::expand_lock()); |
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1128 |
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1129 if (is_class()) { |
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1130 assert(false, "We currently don't support more than one VirtualSpace for" |
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1131 " the compressed class space. The initialization of the" |
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1132 " CCS uses another code path and should not hit this path."); |
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1133 return false; |
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1134 } |
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1135 |
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1136 if (vs_word_size == 0) { |
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1137 assert(false, "vs_word_size should always be at least _reserve_alignment large."); |
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1138 return false; |
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1139 } |
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1140 |
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1141 // Reserve the space |
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1142 size_t vs_byte_size = vs_word_size * BytesPerWord; |
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1143 assert_is_size_aligned(vs_byte_size, Metaspace::reserve_alignment()); |
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1144 |
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1145 // Allocate the meta virtual space and initialize it. |
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1146 VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
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1147 if (!new_entry->initialize()) { |
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1148 delete new_entry; |
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1149 return false; |
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1150 } else { |
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1151 assert(new_entry->reserved_words() == vs_word_size, |
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1152 "Reserved memory size differs from requested memory size"); |
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1153 // ensure lock-free iteration sees fully initialized node |
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1154 OrderAccess::storestore(); |
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1155 link_vs(new_entry); |
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1156 return true; |
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1157 } |
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1158 } |
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1159 |
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1160 void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
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1161 if (virtual_space_list() == NULL) { |
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1162 set_virtual_space_list(new_entry); |
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1163 } else { |
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1164 current_virtual_space()->set_next(new_entry); |
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1165 } |
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1166 set_current_virtual_space(new_entry); |
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1167 inc_reserved_words(new_entry->reserved_words()); |
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1168 inc_committed_words(new_entry->committed_words()); |
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1169 inc_virtual_space_count(); |
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1170 #ifdef ASSERT |
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1171 new_entry->mangle(); |
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1172 #endif |
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1173 if (TraceMetavirtualspaceAllocation && Verbose) { |
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1174 VirtualSpaceNode* vsl = current_virtual_space(); |
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1175 vsl->print_on(gclog_or_tty); |
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1176 } |
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1177 } |
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1178 |
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1179 bool VirtualSpaceList::expand_node_by(VirtualSpaceNode* node, |
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1180 size_t min_words, |
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1181 size_t preferred_words) { |
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1182 size_t before = node->committed_words(); |
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1183 |
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1184 bool result = node->expand_by(min_words, preferred_words); |
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1185 |
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1186 size_t after = node->committed_words(); |
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1187 |
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1188 // after and before can be the same if the memory was pre-committed. |
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1189 assert(after >= before, "Inconsistency"); |
12236
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1190 inc_committed_words(after - before); |
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1191 |
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1192 return result; |
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1193 } |
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1194 |
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1195 bool VirtualSpaceList::expand_by(size_t min_words, size_t preferred_words) { |
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1196 assert_is_size_aligned(min_words, Metaspace::commit_alignment_words()); |
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1197 assert_is_size_aligned(preferred_words, Metaspace::commit_alignment_words()); |
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1198 assert(min_words <= preferred_words, "Invalid arguments"); |
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1199 |
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1200 if (!MetaspaceGC::can_expand(min_words, this->is_class())) { |
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1201 return false; |
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1202 } |
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1203 |
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1204 size_t allowed_expansion_words = MetaspaceGC::allowed_expansion(); |
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1205 if (allowed_expansion_words < min_words) { |
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1206 return false; |
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1207 } |
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1208 |
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1209 size_t max_expansion_words = MIN2(preferred_words, allowed_expansion_words); |
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1210 |
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1211 // Commit more memory from the the current virtual space. |
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1212 bool vs_expanded = expand_node_by(current_virtual_space(), |
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1213 min_words, |
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1214 max_expansion_words); |
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1215 if (vs_expanded) { |
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1216 return true; |
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1217 } |
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1218 |
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1219 // Get another virtual space. |
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1220 size_t grow_vs_words = MAX2((size_t)VirtualSpaceSize, preferred_words); |
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1221 grow_vs_words = align_size_up(grow_vs_words, Metaspace::reserve_alignment_words()); |
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1222 |
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1223 if (create_new_virtual_space(grow_vs_words)) { |
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1224 if (current_virtual_space()->is_pre_committed()) { |
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1225 // The memory was pre-committed, so we are done here. |
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1226 assert(min_words <= current_virtual_space()->committed_words(), |
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1227 "The new VirtualSpace was pre-committed, so it" |
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1228 "should be large enough to fit the alloc request."); |
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1229 return true; |
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1230 } |
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1231 |
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1232 return expand_node_by(current_virtual_space(), |
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1233 min_words, |
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1234 max_expansion_words); |
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1235 } |
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1236 |
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1237 return false; |
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1238 } |
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1239 |
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1240 Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
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1241 size_t grow_chunks_by_words, |
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1242 size_t medium_chunk_bunch) { |
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1243 |
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1244 // Allocate a chunk out of the current virtual space. |
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1245 Metachunk* next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1246 |
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1247 if (next != NULL) { |
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1248 return next; |
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1249 } |
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1250 |
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1251 // The expand amount is currently only determined by the requested sizes |
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1252 // and not how much committed memory is left in the current virtual space. |
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1253 |
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1254 size_t min_word_size = align_size_up(grow_chunks_by_words, Metaspace::commit_alignment_words()); |
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1255 size_t preferred_word_size = align_size_up(medium_chunk_bunch, Metaspace::commit_alignment_words()); |
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1256 if (min_word_size >= preferred_word_size) { |
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1257 // Can happen when humongous chunks are allocated. |
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1258 preferred_word_size = min_word_size; |
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1259 } |
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1260 |
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1261 bool expanded = expand_by(min_word_size, preferred_word_size); |
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1262 if (expanded) { |
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1263 next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
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1264 assert(next != NULL, "The allocation was expected to succeed after the expansion"); |
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1265 } |
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1266 |
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1267 return next; |
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1268 } |
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1269 |
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1270 void VirtualSpaceList::print_on(outputStream* st) const { |
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1271 if (TraceMetadataChunkAllocation && Verbose) { |
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1272 VirtualSpaceListIterator iter(virtual_space_list()); |
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1273 while (iter.repeat()) { |
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1274 VirtualSpaceNode* node = iter.get_next(); |
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1275 node->print_on(st); |
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1276 } |
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1277 } |
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1278 } |
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1279 |
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1280 bool VirtualSpaceList::contains(const void *ptr) { |
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1281 VirtualSpaceNode* list = virtual_space_list(); |
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1282 VirtualSpaceListIterator iter(list); |
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1283 while (iter.repeat()) { |
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1284 VirtualSpaceNode* node = iter.get_next(); |
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1285 if (node->reserved()->contains(ptr)) { |
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1286 return true; |
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1287 } |
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1288 } |
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1289 return false; |
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1290 } |
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1291 |
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1292 |
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1293 // MetaspaceGC methods |
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1294 |
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1295 // VM_CollectForMetadataAllocation is the vm operation used to GC. |
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1296 // Within the VM operation after the GC the attempt to allocate the metadata |
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1297 // should succeed. If the GC did not free enough space for the metaspace |
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1298 // allocation, the HWM is increased so that another virtualspace will be |
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1299 // allocated for the metadata. With perm gen the increase in the perm |
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1300 // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
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1301 // metaspace policy uses those as the small and large steps for the HWM. |
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1302 // |
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1303 // After the GC the compute_new_size() for MetaspaceGC is called to |
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1304 // resize the capacity of the metaspaces. The current implementation |
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1305 // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
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1306 // to resize the Java heap by some GC's. New flags can be implemented |
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1307 // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
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1308 // free space is desirable in the metaspace capacity to decide how much |
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1309 // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
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1310 // free space is desirable in the metaspace capacity before decreasing |
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1311 // the HWM. |
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1312 |
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1313 // Calculate the amount to increase the high water mark (HWM). |
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1314 // Increase by a minimum amount (MinMetaspaceExpansion) so that |
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1315 // another expansion is not requested too soon. If that is not |
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1316 // enough to satisfy the allocation, increase by MaxMetaspaceExpansion. |
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1317 // If that is still not enough, expand by the size of the allocation |
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1318 // plus some. |
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1319 size_t MetaspaceGC::delta_capacity_until_GC(size_t bytes) { |
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1320 size_t min_delta = MinMetaspaceExpansion; |
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1321 size_t max_delta = MaxMetaspaceExpansion; |
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1322 size_t delta = align_size_up(bytes, Metaspace::commit_alignment()); |
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1323 |
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1324 if (delta <= min_delta) { |
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1325 delta = min_delta; |
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1326 } else if (delta <= max_delta) { |
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1327 // Don't want to hit the high water mark on the next |
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1328 // allocation so make the delta greater than just enough |
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1329 // for this allocation. |
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1330 delta = max_delta; |
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1331 } else { |
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1332 // This allocation is large but the next ones are probably not |
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1333 // so increase by the minimum. |
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1334 delta = delta + min_delta; |
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1335 } |
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1336 |
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1337 assert_is_size_aligned(delta, Metaspace::commit_alignment()); |
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1338 |
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1339 return delta; |
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1340 } |
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1341 |
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1342 size_t MetaspaceGC::capacity_until_GC() { |
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1343 size_t value = (size_t)OrderAccess::load_ptr_acquire(&_capacity_until_GC); |
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1344 assert(value >= MetaspaceSize, "Not initialied properly?"); |
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1345 return value; |
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1346 } |
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1347 |
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1348 size_t MetaspaceGC::inc_capacity_until_GC(size_t v) { |
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1349 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1350 |
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1351 return (size_t)Atomic::add_ptr(v, &_capacity_until_GC); |
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1352 } |
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1353 |
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1354 size_t MetaspaceGC::dec_capacity_until_GC(size_t v) { |
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1355 assert_is_size_aligned(v, Metaspace::commit_alignment()); |
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1356 |
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1357 return (size_t)Atomic::add_ptr(-(intptr_t)v, &_capacity_until_GC); |
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1358 } |
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1359 |
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1360 bool MetaspaceGC::can_expand(size_t word_size, bool is_class) { |
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1361 // Check if the compressed class space is full. |
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1362 if (is_class && Metaspace::using_class_space()) { |
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1363 size_t class_committed = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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1364 if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) { |
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1365 return false; |
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1366 } |
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1367 } |
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1368 |
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1369 // Check if the user has imposed a limit on the metaspace memory. |
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1370 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1371 if (committed_bytes + word_size * BytesPerWord > MaxMetaspaceSize) { |
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1372 return false; |
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1373 } |
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1374 |
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1375 return true; |
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1376 } |
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1377 |
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1378 size_t MetaspaceGC::allowed_expansion() { |
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1379 size_t committed_bytes = MetaspaceAux::committed_bytes(); |
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1380 |
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1381 size_t left_until_max = MaxMetaspaceSize - committed_bytes; |
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1382 |
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1383 // Always grant expansion if we are initiating the JVM, |
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1384 // or if the GC_locker is preventing GCs. |
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1385 if (!is_init_completed() || GC_locker::is_active_and_needs_gc()) { |
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1386 return left_until_max / BytesPerWord; |
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1387 } |
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1388 |
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1389 size_t capacity_until_gc = capacity_until_GC(); |
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1390 |
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1391 if (capacity_until_gc <= committed_bytes) { |
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1392 return 0; |
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1393 } |
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1394 |
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1395 size_t left_until_GC = capacity_until_gc - committed_bytes; |
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1396 size_t left_to_commit = MIN2(left_until_GC, left_until_max); |
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1397 |
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1398 return left_to_commit / BytesPerWord; |
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1399 } |
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1400 |
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1401 void MetaspaceGC::compute_new_size() { |
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1402 assert(_shrink_factor <= 100, "invalid shrink factor"); |
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1403 uint current_shrink_factor = _shrink_factor; |
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1404 _shrink_factor = 0; |
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1405 |
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1406 const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
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1407 const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
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1408 |
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1409 const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
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1410 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
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1411 |
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1412 const double min_tmp = used_after_gc / maximum_used_percentage; |
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1413 size_t minimum_desired_capacity = |
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1414 (size_t)MIN2(min_tmp, double(max_uintx)); |
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1415 // Don't shrink less than the initial generation size |
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1416 minimum_desired_capacity = MAX2(minimum_desired_capacity, |
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1417 MetaspaceSize); |
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1418 |
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1419 if (PrintGCDetails && Verbose) { |
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1420 gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
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1421 gclog_or_tty->print_cr(" " |
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1422 " minimum_free_percentage: %6.2f" |
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1423 " maximum_used_percentage: %6.2f", |
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1424 minimum_free_percentage, |
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1425 maximum_used_percentage); |
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1426 gclog_or_tty->print_cr(" " |
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1427 " used_after_gc : %6.1fKB", |
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1428 used_after_gc / (double) K); |
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1429 } |
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1430 |
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1431 |
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1432 size_t shrink_bytes = 0; |
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1433 if (capacity_until_GC < minimum_desired_capacity) { |
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|
1434 // If we have less capacity below the metaspace HWM, then |
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1435 // increment the HWM. |
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1436 size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
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1437 expand_bytes = align_size_up(expand_bytes, Metaspace::commit_alignment()); |
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1438 // Don't expand unless it's significant |
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1439 if (expand_bytes >= MinMetaspaceExpansion) { |
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1440 MetaspaceGC::inc_capacity_until_GC(expand_bytes); |
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1441 } |
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1442 if (PrintGCDetails && Verbose) { |
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1443 size_t new_capacity_until_GC = capacity_until_GC; |
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1444 gclog_or_tty->print_cr(" expanding:" |
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1445 " minimum_desired_capacity: %6.1fKB" |
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1446 " expand_bytes: %6.1fKB" |
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1447 " MinMetaspaceExpansion: %6.1fKB" |
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1448 " new metaspace HWM: %6.1fKB", |
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1449 minimum_desired_capacity / (double) K, |
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1450 expand_bytes / (double) K, |
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1451 MinMetaspaceExpansion / (double) K, |
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1452 new_capacity_until_GC / (double) K); |
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|
1453 } |
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|
1454 return; |
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|
1455 } |
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|
1456 |
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1457 // No expansion, now see if we want to shrink |
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1458 // We would never want to shrink more than this |
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1459 size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
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1460 assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
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1461 max_shrink_bytes)); |
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1462 |
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1463 // Should shrinking be considered? |
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1464 if (MaxMetaspaceFreeRatio < 100) { |
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1465 const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
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1466 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
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1467 const double max_tmp = used_after_gc / minimum_used_percentage; |
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1468 size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
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1469 maximum_desired_capacity = MAX2(maximum_desired_capacity, |
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1470 MetaspaceSize); |
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1471 if (PrintGCDetails && Verbose) { |
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1472 gclog_or_tty->print_cr(" " |
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1473 " maximum_free_percentage: %6.2f" |
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1474 " minimum_used_percentage: %6.2f", |
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|
1475 maximum_free_percentage, |
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|
1476 minimum_used_percentage); |
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1477 gclog_or_tty->print_cr(" " |
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1478 " minimum_desired_capacity: %6.1fKB" |
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1479 " maximum_desired_capacity: %6.1fKB", |
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1480 minimum_desired_capacity / (double) K, |
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|
1481 maximum_desired_capacity / (double) K); |
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|
1482 } |
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|
1483 |
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1484 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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|
1485 "sanity check"); |
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|
1486 |
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1487 if (capacity_until_GC > maximum_desired_capacity) { |
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1488 // Capacity too large, compute shrinking size |
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1489 shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
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1490 // We don't want shrink all the way back to initSize if people call |
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1491 // System.gc(), because some programs do that between "phases" and then |
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1492 // we'd just have to grow the heap up again for the next phase. So we |
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1493 // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
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1494 // on the third call, and 100% by the fourth call. But if we recompute |
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1495 // size without shrinking, it goes back to 0%. |
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1496 shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
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1497 |
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1498 shrink_bytes = align_size_down(shrink_bytes, Metaspace::commit_alignment()); |
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1499 |
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1500 assert(shrink_bytes <= max_shrink_bytes, |
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1501 err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
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1502 shrink_bytes, max_shrink_bytes)); |
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1503 if (current_shrink_factor == 0) { |
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|
1504 _shrink_factor = 10; |
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|
1505 } else { |
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1506 _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
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|
1507 } |
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|
1508 if (PrintGCDetails && Verbose) { |
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|
1509 gclog_or_tty->print_cr(" " |
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|
1510 " shrinking:" |
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|
1511 " initSize: %.1fK" |
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|
1512 " maximum_desired_capacity: %.1fK", |
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|
1513 MetaspaceSize / (double) K, |
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|
1514 maximum_desired_capacity / (double) K); |
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|
1515 gclog_or_tty->print_cr(" " |
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1516 " shrink_bytes: %.1fK" |
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|
1517 " current_shrink_factor: %d" |
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1518 " new shrink factor: %d" |
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1519 " MinMetaspaceExpansion: %.1fK", |
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1520 shrink_bytes / (double) K, |
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|
1521 current_shrink_factor, |
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|
1522 _shrink_factor, |
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|
1523 MinMetaspaceExpansion / (double) K); |
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|
1524 } |
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|
1525 } |
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|
1526 } |
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|
1527 |
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1528 // Don't shrink unless it's significant |
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1529 if (shrink_bytes >= MinMetaspaceExpansion && |
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1530 ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
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|
1531 MetaspaceGC::dec_capacity_until_GC(shrink_bytes); |
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|
1532 } |
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|
1533 } |
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|
1534 |
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|
1535 // Metadebug methods |
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|
1536 |
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1537 void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
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|
1538 size_t chunk_word_size){ |
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|
1539 #ifdef ASSERT |
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|
1540 VirtualSpaceList* vsl = sm->vs_list(); |
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|
1541 if (MetaDataDeallocateALot && |
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|
1542 Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
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1543 Metadebug::reset_deallocate_chunk_a_lot_count(); |
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1544 for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
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1545 Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
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|
1546 if (dummy_chunk == NULL) { |
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|
1547 break; |
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diff
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|
1548 } |
12303
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12302
diff
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|
1549 sm->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
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|
1550 |
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|
1551 if (TraceMetadataChunkAllocation && Verbose) { |
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|
1552 gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
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|
1553 sm->sum_count_in_chunks_in_use()); |
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|
1554 dummy_chunk->print_on(gclog_or_tty); |
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changeset
|
1555 gclog_or_tty->print_cr(" Free chunks total %d count %d", |
12303
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12302
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|
1556 sm->chunk_manager()->free_chunks_total_words(), |
b960c9df4f11
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parents:
12302
diff
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|
1557 sm->chunk_manager()->free_chunks_count()); |
6725
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diff
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|
1558 } |
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diff
changeset
|
1559 } |
da91efe96a93
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diff
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|
1560 } else { |
da91efe96a93
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|
1561 Metadebug::inc_deallocate_chunk_a_lot_count(); |
da91efe96a93
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parents:
diff
changeset
|
1562 } |
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diff
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|
1563 #endif |
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diff
changeset
|
1564 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
1565 |
da91efe96a93
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|
1566 void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
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diff
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|
1567 size_t raw_word_size){ |
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|
1568 #ifdef ASSERT |
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|
1569 if (MetaDataDeallocateALot && |
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|
1570 Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
da91efe96a93
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diff
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|
1571 Metadebug::set_deallocate_block_a_lot_count(0); |
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|
1572 for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
6885 | 1573 MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
6725
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|
1574 if (dummy_block == 0) { |
da91efe96a93
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|
1575 break; |
da91efe96a93
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diff
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|
1576 } |
6885 | 1577 sm->deallocate(dummy_block, raw_word_size); |
6725
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|
1578 } |
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|
1579 } else { |
da91efe96a93
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|
1580 Metadebug::inc_deallocate_block_a_lot_count(); |
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|
1581 } |
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|
1582 #endif |
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|
1583 } |
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|
1584 |
da91efe96a93
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|
1585 void Metadebug::init_allocation_fail_alot_count() { |
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|
1586 if (MetadataAllocationFailALot) { |
da91efe96a93
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|
1587 _allocation_fail_alot_count = |
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1588 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
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|
1589 } |
da91efe96a93
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diff
changeset
|
1590 } |
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|
1591 |
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|
1592 #ifdef ASSERT |
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|
1593 bool Metadebug::test_metadata_failure() { |
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|
1594 if (MetadataAllocationFailALot && |
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|
1595 Threads::is_vm_complete()) { |
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|
1596 if (_allocation_fail_alot_count > 0) { |
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|
1597 _allocation_fail_alot_count--; |
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|
1598 } else { |
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|
1599 if (TraceMetadataChunkAllocation && Verbose) { |
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1600 gclog_or_tty->print_cr("Metadata allocation failing for " |
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|
1601 "MetadataAllocationFailALot"); |
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|
1602 } |
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|
1603 init_allocation_fail_alot_count(); |
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|
1604 return true; |
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|
1605 } |
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|
1606 } |
da91efe96a93
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|
1607 return false; |
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|
1608 } |
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|
1609 #endif |
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|
1610 |
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|
1611 // ChunkManager methods |
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|
1612 |
12235 | 1613 size_t ChunkManager::free_chunks_total_words() { |
6725
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|
1614 return _free_chunks_total; |
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|
1615 } |
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|
1616 |
12235 | 1617 size_t ChunkManager::free_chunks_total_bytes() { |
1618 return free_chunks_total_words() * BytesPerWord; | |
6725
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|
1619 } |
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|
1620 |
da91efe96a93
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|
1621 size_t ChunkManager::free_chunks_count() { |
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diff
changeset
|
1622 #ifdef ASSERT |
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|
1623 if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
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|
1624 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
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|
1625 Mutex::_no_safepoint_check_flag); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1626 // This lock is only needed in debug because the verification |
da91efe96a93
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diff
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|
1627 // of the _free_chunks_totals walks the list of free chunks |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1628 slow_locked_verify_free_chunks_count(); |
6725
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parents:
diff
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|
1629 } |
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diff
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|
1630 #endif |
6969
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parents:
6885
diff
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|
1631 return _free_chunks_count; |
6725
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diff
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|
1632 } |
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diff
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|
1633 |
da91efe96a93
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|
1634 void ChunkManager::locked_verify_free_chunks_total() { |
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|
1635 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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diff
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|
1636 assert(sum_free_chunks() == _free_chunks_total, |
da91efe96a93
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diff
changeset
|
1637 err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
da91efe96a93
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parents:
diff
changeset
|
1638 " same as sum " SIZE_FORMAT, _free_chunks_total, |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1639 sum_free_chunks())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1640 } |
da91efe96a93
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diff
changeset
|
1641 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
1642 void ChunkManager::verify_free_chunks_total() { |
da91efe96a93
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diff
changeset
|
1643 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
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diff
changeset
|
1644 Mutex::_no_safepoint_check_flag); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1645 locked_verify_free_chunks_total(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1646 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1647 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
1648 void ChunkManager::locked_verify_free_chunks_count() { |
da91efe96a93
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parents:
diff
changeset
|
1649 assert_lock_strong(SpaceManager::expand_lock()); |
da91efe96a93
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diff
changeset
|
1650 assert(sum_free_chunks_count() == _free_chunks_count, |
da91efe96a93
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diff
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|
1651 err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
da91efe96a93
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parents:
diff
changeset
|
1652 " same as sum " SIZE_FORMAT, _free_chunks_count, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1653 sum_free_chunks_count())); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
1654 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
1655 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
1656 void ChunkManager::verify_free_chunks_count() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
1657 #ifdef ASSERT |
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|
1658 MutexLockerEx cl(SpaceManager::expand_lock(), |
da91efe96a93
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diff
changeset
|
1659 Mutex::_no_safepoint_check_flag); |
da91efe96a93
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coleenp
parents:
diff
changeset
|
1660 locked_verify_free_chunks_count(); |
da91efe96a93
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coleenp
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diff
changeset
|
1661 #endif |
da91efe96a93
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diff
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|
1662 } |
da91efe96a93
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diff
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|
1663 |
da91efe96a93
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diff
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|
1664 void ChunkManager::verify() { |
6969
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7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1665 MutexLockerEx cl(SpaceManager::expand_lock(), |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1666 Mutex::_no_safepoint_check_flag); |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
1667 locked_verify(); |
6725
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|
1668 } |
da91efe96a93
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|
1669 |
da91efe96a93
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|
1670 void ChunkManager::locked_verify() { |
6885 | 1671 locked_verify_free_chunks_count(); |
6725
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|
1672 locked_verify_free_chunks_total(); |
da91efe96a93
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diff
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|
1673 } |
da91efe96a93
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|
1674 |
da91efe96a93
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|
1675 void ChunkManager::locked_print_free_chunks(outputStream* st) { |
da91efe96a93
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diff
changeset
|
1676 assert_lock_strong(SpaceManager::expand_lock()); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
1677 st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
6725
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|
1678 _free_chunks_total, _free_chunks_count); |
da91efe96a93
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diff
changeset
|
1679 } |
da91efe96a93
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diff
changeset
|
1680 |
da91efe96a93
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|
1681 void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
da91efe96a93
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diff
changeset
|
1682 assert_lock_strong(SpaceManager::expand_lock()); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
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|
1683 st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
6725
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diff
changeset
|
1684 sum_free_chunks(), sum_free_chunks_count()); |
da91efe96a93
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diff
changeset
|
1685 } |
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diff
changeset
|
1686 ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
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coleenp
parents:
diff
changeset
|
1687 return &_free_chunks[index]; |
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diff
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|
1688 } |
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changeset
|
1689 |
da91efe96a93
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|
1690 // These methods that sum the free chunk lists are used in printing |
da91efe96a93
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changeset
|
1691 // methods that are used in product builds. |
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1692 size_t ChunkManager::sum_free_chunks() { |
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1693 assert_lock_strong(SpaceManager::expand_lock()); |
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1694 size_t result = 0; |
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1695 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1696 ChunkList* list = free_chunks(i); |
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1697 |
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1698 if (list == NULL) { |
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1699 continue; |
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1700 } |
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1701 |
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1702 result = result + list->count() * list->size(); |
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1703 } |
6885 | 1704 result = result + humongous_dictionary()->total_size(); |
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1705 return result; |
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1706 } |
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1707 |
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1708 size_t ChunkManager::sum_free_chunks_count() { |
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1709 assert_lock_strong(SpaceManager::expand_lock()); |
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1710 size_t count = 0; |
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1711 for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
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1712 ChunkList* list = free_chunks(i); |
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1713 if (list == NULL) { |
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1714 continue; |
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1715 } |
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1716 count = count + list->count(); |
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1717 } |
6885 | 1718 count = count + humongous_dictionary()->total_free_blocks(); |
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1719 return count; |
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1720 } |
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1721 |
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1722 ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
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1723 ChunkIndex index = list_index(word_size); |
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1724 assert(index < HumongousIndex, "No humongous list"); |
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1725 return free_chunks(index); |
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1726 } |
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1727 |
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1728 void ChunkManager::free_chunks_put(Metachunk* chunk) { |
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1729 assert_lock_strong(SpaceManager::expand_lock()); |
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1730 ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
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1731 chunk->set_next(free_list->head()); |
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1732 free_list->set_head(chunk); |
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1733 // chunk is being returned to the chunk free list |
12902 | 1734 inc_free_chunks_total(chunk->word_size()); |
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1735 slow_locked_verify(); |
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1736 } |
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1737 |
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1738 void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
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1739 // The deallocation of a chunk originates in the freelist |
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1740 // manangement code for a Metaspace and does not hold the |
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1741 // lock. |
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1742 assert(chunk != NULL, "Deallocating NULL"); |
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1743 assert_lock_strong(SpaceManager::expand_lock()); |
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1744 slow_locked_verify(); |
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1745 if (TraceMetadataChunkAllocation) { |
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1746 gclog_or_tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
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1747 PTR_FORMAT " size " SIZE_FORMAT, |
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1748 chunk, chunk->word_size()); |
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1749 } |
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1750 free_chunks_put(chunk); |
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1751 } |
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1752 |
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1753 Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
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1754 assert_lock_strong(SpaceManager::expand_lock()); |
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1755 |
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1756 slow_locked_verify(); |
6885 | 1757 |
1758 Metachunk* chunk = NULL; | |
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1759 if (list_index(word_size) != HumongousIndex) { |
6885 | 1760 ChunkList* free_list = find_free_chunks_list(word_size); |
1761 assert(free_list != NULL, "Sanity check"); | |
1762 | |
1763 chunk = free_list->head(); | |
1764 | |
1765 if (chunk == NULL) { | |
1766 return NULL; | |
1767 } | |
1768 | |
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1769 // Remove the chunk as the head of the list. |
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1770 free_list->remove_chunk(chunk); |
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1771 |
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1772 if (TraceMetadataChunkAllocation && Verbose) { |
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1773 gclog_or_tty->print_cr("ChunkManager::free_chunks_get: free_list " |
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1774 PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
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1775 free_list, chunk, chunk->word_size()); |
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1776 } |
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1777 } else { |
6885 | 1778 chunk = humongous_dictionary()->get_chunk( |
1779 word_size, | |
1780 FreeBlockDictionary<Metachunk>::atLeast); | |
1781 | |
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1782 if (chunk == NULL) { |
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1783 return NULL; |
6885 | 1784 } |
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1785 |
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1786 if (TraceMetadataHumongousAllocation) { |
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1787 size_t waste = chunk->word_size() - word_size; |
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1788 gclog_or_tty->print_cr("Free list allocate humongous chunk size " |
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1789 SIZE_FORMAT " for requested size " SIZE_FORMAT |
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1790 " waste " SIZE_FORMAT, |
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1791 chunk->word_size(), word_size, waste); |
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1792 } |
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1793 } |
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1794 |
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1795 // Chunk is being removed from the chunks free list. |
12902 | 1796 dec_free_chunks_total(chunk->word_size()); |
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1797 |
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1798 // Remove it from the links to this freelist |
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1799 chunk->set_next(NULL); |
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1800 chunk->set_prev(NULL); |
10175 | 1801 #ifdef ASSERT |
1802 // Chunk is no longer on any freelist. Setting to false make container_count_slow() | |
1803 // work. | |
12902 | 1804 chunk->set_is_tagged_free(false); |
10175 | 1805 #endif |
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1806 chunk->container()->inc_container_count(); |
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1807 |
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1808 slow_locked_verify(); |
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1809 return chunk; |
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1810 } |
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1811 |
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1812 Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
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1813 assert_lock_strong(SpaceManager::expand_lock()); |
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1814 slow_locked_verify(); |
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1815 |
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1816 // Take from the beginning of the list |
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1817 Metachunk* chunk = free_chunks_get(word_size); |
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1818 if (chunk == NULL) { |
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1819 return NULL; |
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1820 } |
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1821 |
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1822 assert((word_size <= chunk->word_size()) || |
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1823 list_index(chunk->word_size() == HumongousIndex), |
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1824 "Non-humongous variable sized chunk"); |
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1825 if (TraceMetadataChunkAllocation) { |
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1826 size_t list_count; |
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1827 if (list_index(word_size) < HumongousIndex) { |
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1828 ChunkList* list = find_free_chunks_list(word_size); |
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1829 list_count = list->count(); |
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1830 } else { |
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1831 list_count = humongous_dictionary()->total_count(); |
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1832 } |
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1833 gclog_or_tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
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1834 PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
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1835 this, chunk, chunk->word_size(), list_count); |
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1836 locked_print_free_chunks(gclog_or_tty); |
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1837 } |
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1838 |
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1839 return chunk; |
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1840 } |
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1841 |
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1842 void ChunkManager::print_on(outputStream* out) const { |
6885 | 1843 if (PrintFLSStatistics != 0) { |
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1844 const_cast<ChunkManager *>(this)->humongous_dictionary()->report_statistics(); |
6885 | 1845 } |
1846 } | |
1847 | |
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1848 // SpaceManager methods |
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1849 |
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1850 void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
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1851 size_t* chunk_word_size, |
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1852 size_t* class_chunk_word_size) { |
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1853 switch (type) { |
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1854 case Metaspace::BootMetaspaceType: |
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1855 *chunk_word_size = Metaspace::first_chunk_word_size(); |
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1856 *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
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1857 break; |
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1858 case Metaspace::ROMetaspaceType: |
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1859 *chunk_word_size = SharedReadOnlySize / wordSize; |
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1860 *class_chunk_word_size = ClassSpecializedChunk; |
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1861 break; |
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1862 case Metaspace::ReadWriteMetaspaceType: |
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1863 *chunk_word_size = SharedReadWriteSize / wordSize; |
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1864 *class_chunk_word_size = ClassSpecializedChunk; |
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1865 break; |
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1866 case Metaspace::AnonymousMetaspaceType: |
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1867 case Metaspace::ReflectionMetaspaceType: |
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1868 *chunk_word_size = SpecializedChunk; |
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1869 *class_chunk_word_size = ClassSpecializedChunk; |
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1870 break; |
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1871 default: |
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1872 *chunk_word_size = SmallChunk; |
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1873 *class_chunk_word_size = ClassSmallChunk; |
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1874 break; |
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1875 } |
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1876 assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
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1877 err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
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1878 " class " SIZE_FORMAT, |
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1879 *chunk_word_size, *class_chunk_word_size)); |
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1880 } |
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1881 |
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1882 size_t SpaceManager::sum_free_in_chunks_in_use() const { |
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1883 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1884 size_t free = 0; |
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1885 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1886 Metachunk* chunk = chunks_in_use(i); |
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1887 while (chunk != NULL) { |
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1888 free += chunk->free_word_size(); |
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1889 chunk = chunk->next(); |
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1890 } |
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1891 } |
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1892 return free; |
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1893 } |
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1894 |
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1895 size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
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1896 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1897 size_t result = 0; |
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1898 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1899 result += sum_waste_in_chunks_in_use(i); |
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1900 } |
6885 | 1901 |
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1902 return result; |
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1903 } |
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1904 |
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1905 size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
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1906 size_t result = 0; |
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1907 Metachunk* chunk = chunks_in_use(index); |
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1908 // Count the free space in all the chunk but not the |
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1909 // current chunk from which allocations are still being done. |
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1910 while (chunk != NULL) { |
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1911 if (chunk != current_chunk()) { |
6885 | 1912 result += chunk->free_word_size(); |
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1913 } |
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1914 chunk = chunk->next(); |
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1915 } |
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1916 return result; |
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1917 } |
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1918 |
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1919 size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
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1920 // For CMS use "allocated_chunks_words()" which does not need the |
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1921 // Metaspace lock. For the other collectors sum over the |
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1922 // lists. Use both methods as a check that "allocated_chunks_words()" |
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1923 // is correct. That is, sum_capacity_in_chunks() is too expensive |
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1924 // to use in the product and allocated_chunks_words() should be used |
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1925 // but allow for checking that allocated_chunks_words() returns the same |
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1926 // value as sum_capacity_in_chunks_in_use() which is the definitive |
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1927 // answer. |
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1928 if (UseConcMarkSweepGC) { |
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1929 return allocated_chunks_words(); |
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1930 } else { |
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1931 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1932 size_t sum = 0; |
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1933 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1934 Metachunk* chunk = chunks_in_use(i); |
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1935 while (chunk != NULL) { |
12902 | 1936 sum += chunk->word_size(); |
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1937 chunk = chunk->next(); |
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1938 } |
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1939 } |
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1940 return sum; |
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1941 } |
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1942 } |
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1943 |
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1944 size_t SpaceManager::sum_count_in_chunks_in_use() { |
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1945 size_t count = 0; |
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1946 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1947 count = count + sum_count_in_chunks_in_use(i); |
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1948 } |
6885 | 1949 |
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1950 return count; |
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1951 } |
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1952 |
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1953 size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
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1954 size_t count = 0; |
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1955 Metachunk* chunk = chunks_in_use(i); |
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1956 while (chunk != NULL) { |
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1957 count++; |
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1958 chunk = chunk->next(); |
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1959 } |
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1960 return count; |
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1961 } |
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1962 |
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1963 |
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1964 size_t SpaceManager::sum_used_in_chunks_in_use() const { |
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1965 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
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1966 size_t used = 0; |
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1967 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1968 Metachunk* chunk = chunks_in_use(i); |
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1969 while (chunk != NULL) { |
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1970 used += chunk->used_word_size(); |
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1971 chunk = chunk->next(); |
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1972 } |
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1973 } |
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1974 return used; |
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1975 } |
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1976 |
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1977 void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
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1978 |
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1979 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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1980 Metachunk* chunk = chunks_in_use(i); |
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1981 st->print("SpaceManager: %s " PTR_FORMAT, |
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1982 chunk_size_name(i), chunk); |
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1983 if (chunk != NULL) { |
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1984 st->print_cr(" free " SIZE_FORMAT, |
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1985 chunk->free_word_size()); |
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1986 } else { |
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1987 st->print_cr(""); |
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1988 } |
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1989 } |
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1990 |
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1991 chunk_manager()->locked_print_free_chunks(st); |
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1992 chunk_manager()->locked_print_sum_free_chunks(st); |
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1993 } |
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1994 |
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1995 size_t SpaceManager::calc_chunk_size(size_t word_size) { |
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1996 |
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1997 // Decide between a small chunk and a medium chunk. Up to |
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1998 // _small_chunk_limit small chunks can be allocated but |
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1999 // once a medium chunk has been allocated, no more small |
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2000 // chunks will be allocated. |
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2001 size_t chunk_word_size; |
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2002 if (chunks_in_use(MediumIndex) == NULL && |
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2003 sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
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2004 chunk_word_size = (size_t) small_chunk_size(); |
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2005 if (word_size + Metachunk::overhead() > small_chunk_size()) { |
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2006 chunk_word_size = medium_chunk_size(); |
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2007 } |
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2008 } else { |
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2009 chunk_word_size = medium_chunk_size(); |
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2010 } |
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2011 |
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2012 // Might still need a humongous chunk. Enforce an |
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2013 // eight word granularity to facilitate reuse (some |
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2014 // wastage but better chance of reuse). |
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2015 size_t if_humongous_sized_chunk = |
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2016 align_size_up(word_size + Metachunk::overhead(), |
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2017 HumongousChunkGranularity); |
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2018 chunk_word_size = |
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2019 MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
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2020 |
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2021 assert(!SpaceManager::is_humongous(word_size) || |
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2022 chunk_word_size == if_humongous_sized_chunk, |
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2023 err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
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2024 " chunk_word_size " SIZE_FORMAT, |
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2025 word_size, chunk_word_size)); |
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2026 if (TraceMetadataHumongousAllocation && |
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2027 SpaceManager::is_humongous(word_size)) { |
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2028 gclog_or_tty->print_cr("Metadata humongous allocation:"); |
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2029 gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
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2030 gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
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2031 chunk_word_size); |
6885 | 2032 gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
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2033 Metachunk::overhead()); |
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2034 } |
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2035 return chunk_word_size; |
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2036 } |
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2037 |
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2038 void SpaceManager::track_metaspace_memory_usage() { |
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2039 if (is_init_completed()) { |
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2040 if (is_class()) { |
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2041 MemoryService::track_compressed_class_memory_usage(); |
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2042 } |
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2043 MemoryService::track_metaspace_memory_usage(); |
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2044 } |
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2045 } |
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2046 |
6885 | 2047 MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
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2048 assert(vs_list()->current_virtual_space() != NULL, |
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2049 "Should have been set"); |
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2050 assert(current_chunk() == NULL || |
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2051 current_chunk()->allocate(word_size) == NULL, |
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2052 "Don't need to expand"); |
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2053 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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2054 |
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2055 if (TraceMetadataChunkAllocation && Verbose) { |
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2056 size_t words_left = 0; |
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2057 size_t words_used = 0; |
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2058 if (current_chunk() != NULL) { |
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2059 words_left = current_chunk()->free_word_size(); |
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2060 words_used = current_chunk()->used_word_size(); |
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2061 } |
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2062 gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
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2063 " words " SIZE_FORMAT " words used " SIZE_FORMAT |
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2064 " words left", |
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2065 word_size, words_used, words_left); |
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2066 } |
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2067 |
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2068 // Get another chunk out of the virtual space |
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2069 size_t grow_chunks_by_words = calc_chunk_size(word_size); |
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2070 Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
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2071 |
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2072 if (next != NULL) { |
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2073 Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
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2074 } |
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2075 |
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2076 MetaWord* mem = NULL; |
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2077 |
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2078 // If a chunk was available, add it to the in-use chunk list |
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2079 // and do an allocation from it. |
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2080 if (next != NULL) { |
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2081 // Add to this manager's list of chunks in use. |
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2082 add_chunk(next, false); |
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2083 mem = next->allocate(word_size); |
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2084 } |
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2085 |
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2086 // Track metaspace memory usage statistic. |
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2087 track_metaspace_memory_usage(); |
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2088 |
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2089 return mem; |
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2090 } |
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2091 |
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2092 void SpaceManager::print_on(outputStream* st) const { |
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2093 |
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2094 for (ChunkIndex i = ZeroIndex; |
6885 | 2095 i < NumberOfInUseLists ; |
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2096 i = next_chunk_index(i) ) { |
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2097 st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
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2098 chunks_in_use(i), |
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2099 chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
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2100 } |
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2101 st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
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2102 " Humongous " SIZE_FORMAT, |
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2103 sum_waste_in_chunks_in_use(SmallIndex), |
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2104 sum_waste_in_chunks_in_use(MediumIndex), |
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2105 sum_waste_in_chunks_in_use(HumongousIndex)); |
6885 | 2106 // block free lists |
2107 if (block_freelists() != NULL) { | |
2108 st->print_cr("total in block free lists " SIZE_FORMAT, | |
2109 block_freelists()->total_size()); | |
2110 } | |
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2111 } |
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2112 |
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2113 SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
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2114 Mutex* lock) : |
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2115 _mdtype(mdtype), |
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2116 _allocated_blocks_words(0), |
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2117 _allocated_chunks_words(0), |
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2118 _allocated_chunks_count(0), |
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2119 _lock(lock) |
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2120 { |
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2121 initialize(); |
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2122 } |
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2123 |
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2124 void SpaceManager::inc_size_metrics(size_t words) { |
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2125 assert_lock_strong(SpaceManager::expand_lock()); |
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2126 // Total of allocated Metachunks and allocated Metachunks count |
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2127 // for each SpaceManager |
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2128 _allocated_chunks_words = _allocated_chunks_words + words; |
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2129 _allocated_chunks_count++; |
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2130 // Global total of capacity in allocated Metachunks |
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2131 MetaspaceAux::inc_capacity(mdtype(), words); |
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2132 // Global total of allocated Metablocks. |
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2133 // used_words_slow() includes the overhead in each |
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2134 // Metachunk so include it in the used when the |
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2135 // Metachunk is first added (so only added once per |
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2136 // Metachunk). |
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2137 MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
10183
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2138 } |
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2139 |
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2140 void SpaceManager::inc_used_metrics(size_t words) { |
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2141 // Add to the per SpaceManager total |
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2142 Atomic::add_ptr(words, &_allocated_blocks_words); |
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2143 // Add to the global total |
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2144 MetaspaceAux::inc_used(mdtype(), words); |
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2145 } |
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2146 |
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2147 void SpaceManager::dec_total_from_size_metrics() { |
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2148 MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
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2149 MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
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2150 // Also deduct the overhead per Metachunk |
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2151 MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
10183
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2152 } |
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2153 |
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2154 void SpaceManager::initialize() { |
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2155 Metadebug::init_allocation_fail_alot_count(); |
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2156 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
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2157 _chunks_in_use[i] = NULL; |
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2158 } |
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2159 _current_chunk = NULL; |
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2160 if (TraceMetadataChunkAllocation && Verbose) { |
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2161 gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
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2162 } |
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2163 } |
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2164 |
10101
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2165 void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
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2166 if (chunks == NULL) { |
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2167 return; |
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|
2168 } |
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|
2169 ChunkList* list = free_chunks(index); |
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2170 assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
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2171 assert_lock_strong(SpaceManager::expand_lock()); |
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2172 Metachunk* cur = chunks; |
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2173 |
10175 | 2174 // This returns chunks one at a time. If a new |
10101
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2175 // class List can be created that is a base class |
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2176 // of FreeList then something like FreeList::prepend() |
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2177 // can be used in place of this loop |
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|
2178 while (cur != NULL) { |
10175 | 2179 assert(cur->container() != NULL, "Container should have been set"); |
2180 cur->container()->dec_container_count(); | |
10101
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2181 // Capture the next link before it is changed |
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2182 // by the call to return_chunk_at_head(); |
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|
2183 Metachunk* next = cur->next(); |
12902 | 2184 DEBUG_ONLY(cur->set_is_tagged_free(true);) |
10101
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|
2185 list->return_chunk_at_head(cur); |
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|
2186 cur = next; |
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|
2187 } |
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|
2188 } |
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|
2189 |
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2190 SpaceManager::~SpaceManager() { |
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2191 // This call this->_lock which can't be done while holding expand_lock() |
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2192 assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
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2193 err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
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2194 " allocated_chunks_words() " SIZE_FORMAT, |
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|
2195 sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
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2196 |
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2197 MutexLockerEx fcl(SpaceManager::expand_lock(), |
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2198 Mutex::_no_safepoint_check_flag); |
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2199 |
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2200 chunk_manager()->slow_locked_verify(); |
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2201 |
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|
2202 dec_total_from_size_metrics(); |
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2203 |
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2204 if (TraceMetadataChunkAllocation && Verbose) { |
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2205 gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
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2206 locked_print_chunks_in_use_on(gclog_or_tty); |
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2207 } |
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2208 |
10175 | 2209 // Do not mangle freed Metachunks. The chunk size inside Metachunks |
2210 // is during the freeing of a VirtualSpaceNodes. | |
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|
2211 |
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2212 // Have to update before the chunks_in_use lists are emptied |
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2213 // below. |
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2214 chunk_manager()->inc_free_chunks_total(allocated_chunks_words(), |
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2215 sum_count_in_chunks_in_use()); |
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2216 |
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2217 // Add all the chunks in use by this space manager |
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2218 // to the global list of free chunks. |
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2219 |
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2220 // Follow each list of chunks-in-use and add them to the |
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2221 // free lists. Each list is NULL terminated. |
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2222 |
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2223 for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
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2224 if (TraceMetadataChunkAllocation && Verbose) { |
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2225 gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
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2226 sum_count_in_chunks_in_use(i), |
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2227 chunk_size_name(i)); |
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2228 } |
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2229 Metachunk* chunks = chunks_in_use(i); |
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2230 chunk_manager()->return_chunks(i, chunks); |
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2231 set_chunks_in_use(i, NULL); |
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2232 if (TraceMetadataChunkAllocation && Verbose) { |
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2233 gclog_or_tty->print_cr("updated freelist count %d %s", |
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2234 chunk_manager()->free_chunks(i)->count(), |
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2235 chunk_size_name(i)); |
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2236 } |
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2237 assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
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2238 } |
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2239 |
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2240 // The medium chunk case may be optimized by passing the head and |
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2241 // tail of the medium chunk list to add_at_head(). The tail is often |
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2242 // the current chunk but there are probably exceptions. |
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2243 |
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2244 // Humongous chunks |
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2245 if (TraceMetadataChunkAllocation && Verbose) { |
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2246 gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
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2247 sum_count_in_chunks_in_use(HumongousIndex), |
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2248 chunk_size_name(HumongousIndex)); |
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2249 gclog_or_tty->print("Humongous chunk dictionary: "); |
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2250 } |
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2251 // Humongous chunks are never the current chunk. |
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2252 Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
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2253 |
6885 | 2254 while (humongous_chunks != NULL) { |
2255 #ifdef ASSERT | |
12902 | 2256 humongous_chunks->set_is_tagged_free(true); |
6885 | 2257 #endif |
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2258 if (TraceMetadataChunkAllocation && Verbose) { |
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2259 gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
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2260 humongous_chunks, |
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2261 humongous_chunks->word_size()); |
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2262 } |
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2263 assert(humongous_chunks->word_size() == (size_t) |
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2264 align_size_up(humongous_chunks->word_size(), |
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2265 HumongousChunkGranularity), |
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2266 err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
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2267 " granularity %d", |
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2268 humongous_chunks->word_size(), HumongousChunkGranularity)); |
6885 | 2269 Metachunk* next_humongous_chunks = humongous_chunks->next(); |
10175 | 2270 humongous_chunks->container()->dec_container_count(); |
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2271 chunk_manager()->humongous_dictionary()->return_chunk(humongous_chunks); |
6885 | 2272 humongous_chunks = next_humongous_chunks; |
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2273 } |
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2274 if (TraceMetadataChunkAllocation && Verbose) { |
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2275 gclog_or_tty->print_cr(""); |
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2276 gclog_or_tty->print_cr("updated dictionary count %d %s", |
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2277 chunk_manager()->humongous_dictionary()->total_count(), |
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2278 chunk_size_name(HumongousIndex)); |
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2279 } |
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2280 chunk_manager()->slow_locked_verify(); |
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2281 } |
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2282 |
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2283 const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
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2284 switch (index) { |
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2285 case SpecializedIndex: |
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2286 return "Specialized"; |
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2287 case SmallIndex: |
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2288 return "Small"; |
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2289 case MediumIndex: |
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2290 return "Medium"; |
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2291 case HumongousIndex: |
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2292 return "Humongous"; |
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2293 default: |
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2294 return NULL; |
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2295 } |
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2296 } |
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2297 |
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2298 ChunkIndex ChunkManager::list_index(size_t size) { |
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2299 switch (size) { |
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2300 case SpecializedChunk: |
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2301 assert(SpecializedChunk == ClassSpecializedChunk, |
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2302 "Need branch for ClassSpecializedChunk"); |
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2303 return SpecializedIndex; |
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2304 case SmallChunk: |
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2305 case ClassSmallChunk: |
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2306 return SmallIndex; |
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2307 case MediumChunk: |
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2308 case ClassMediumChunk: |
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2309 return MediumIndex; |
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2310 default: |
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2311 assert(size > MediumChunk || size > ClassMediumChunk, |
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2312 "Not a humongous chunk"); |
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2313 return HumongousIndex; |
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2314 } |
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2315 } |
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2316 |
6885 | 2317 void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
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2318 assert_lock_strong(_lock); |
11966 | 2319 size_t raw_word_size = get_raw_word_size(word_size); |
6885 | 2320 size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
11966 | 2321 assert(raw_word_size >= min_size, |
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2322 err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
11966 | 2323 block_freelists()->return_block(p, raw_word_size); |
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2324 } |
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2325 |
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2326 // Adds a chunk to the list of chunks in use. |
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2327 void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
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2328 |
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2329 assert(new_chunk != NULL, "Should not be NULL"); |
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2330 assert(new_chunk->next() == NULL, "Should not be on a list"); |
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2331 |
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2332 new_chunk->reset_empty(); |
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2333 |
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2334 // Find the correct list and and set the current |
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2335 // chunk for that list. |
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2336 ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
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2337 |
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2338 if (index != HumongousIndex) { |
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2339 retire_current_chunk(); |
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2340 set_current_chunk(new_chunk); |
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2341 new_chunk->set_next(chunks_in_use(index)); |
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2342 set_chunks_in_use(index, new_chunk); |
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2343 } else { |
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2344 // For null class loader data and DumpSharedSpaces, the first chunk isn't |
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2345 // small, so small will be null. Link this first chunk as the current |
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2346 // chunk. |
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2347 if (make_current) { |
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2348 // Set as the current chunk but otherwise treat as a humongous chunk. |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2349 set_current_chunk(new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2350 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2351 // Link at head. The _current_chunk only points to a humongous chunk for |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2352 // the null class loader metaspace (class and data virtual space managers) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2353 // any humongous chunks so will not point to the tail |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2354 // of the humongous chunks list. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2355 new_chunk->set_next(chunks_in_use(HumongousIndex)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2356 set_chunks_in_use(HumongousIndex, new_chunk); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2357 |
7447
1de1b145f6bc
8005486: NPG: Incorrect assertion in ChunkManager::list_index()
jmasa
parents:
7446
diff
changeset
|
2358 assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2359 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2360 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2361 // Add to the running sum of capacity |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2362 inc_size_metrics(new_chunk->word_size()); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
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|
2363 |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2364 assert(new_chunk->is_empty(), "Not ready for reuse"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2365 if (TraceMetadataChunkAllocation && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2366 gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2367 sum_count_in_chunks_in_use()); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2368 new_chunk->print_on(gclog_or_tty); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2369 chunk_manager()->locked_print_free_chunks(gclog_or_tty); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2370 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2371 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2372 |
12231
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2373 void SpaceManager::retire_current_chunk() { |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2374 if (current_chunk() != NULL) { |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2375 size_t remaining_words = current_chunk()->free_word_size(); |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2376 if (remaining_words >= TreeChunk<Metablock, FreeList>::min_size()) { |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2377 block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2378 inc_used_metrics(remaining_words); |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2379 } |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2380 } |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2381 } |
24e87613ee58
8009561: NPG: Metaspace fragmentation when retiring a Metachunk
mgerdin
parents:
12226
diff
changeset
|
2382 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2383 Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2384 size_t grow_chunks_by_words) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2385 // Get a chunk from the chunk freelist |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2386 Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2387 |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2388 if (next == NULL) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2389 next = vs_list()->get_new_chunk(word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2390 grow_chunks_by_words, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2391 medium_chunk_bunch()); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2392 } |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2393 |
12239 | 2394 if (TraceMetadataHumongousAllocation && next != NULL && |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2395 SpaceManager::is_humongous(next->word_size())) { |
12239 | 2396 gclog_or_tty->print_cr(" new humongous chunk word size " |
2397 PTR_FORMAT, next->word_size()); | |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2398 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2399 |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2400 return next; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2401 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2402 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2403 MetaWord* SpaceManager::allocate(size_t word_size) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2404 MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2405 |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
2406 size_t raw_word_size = get_raw_word_size(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2407 BlockFreelist* fl = block_freelists(); |
6885 | 2408 MetaWord* p = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2409 // Allocation from the dictionary is expensive in the sense that |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2410 // the dictionary has to be searched for a size. Don't allocate |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2411 // from the dictionary until it starts to get fat. Is this |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2412 // a reasonable policy? Maybe an skinny dictionary is fast enough |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2413 // for allocations. Do some profiling. JJJ |
6885 | 2414 if (fl->total_size() > allocation_from_dictionary_limit) { |
2415 p = fl->get_block(raw_word_size); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2416 } |
6885 | 2417 if (p == NULL) { |
2418 p = allocate_work(raw_word_size); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2419 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2420 Metadebug::deallocate_block_a_lot(this, raw_word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2421 |
6885 | 2422 return p; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2423 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2424 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2425 // Returns the address of spaced allocated for "word_size". |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2426 // This methods does not know about blocks (Metablocks) |
6885 | 2427 MetaWord* SpaceManager::allocate_work(size_t word_size) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2428 assert_lock_strong(_lock); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2429 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2430 if (Metadebug::test_metadata_failure()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2431 return NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2432 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2433 #endif |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2434 // Is there space in the current chunk? |
6885 | 2435 MetaWord* result = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2436 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2437 // For DumpSharedSpaces, only allocate out of the current chunk which is |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2438 // never null because we gave it the size we wanted. Caller reports out |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2439 // of memory if this returns null. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2440 if (DumpSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2441 assert(current_chunk() != NULL, "should never happen"); |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2442 inc_used_metrics(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2443 return current_chunk()->allocate(word_size); // caller handles null result |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2444 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2445 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2446 if (current_chunk() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2447 result = current_chunk()->allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2448 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2449 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2450 if (result == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2451 result = grow_and_allocate(word_size); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2452 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2453 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2454 if (result != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2455 inc_used_metrics(word_size); |
6885 | 2456 assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
2457 "Head of the list is being allocated"); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2458 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2459 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2460 return result; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2461 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2462 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2463 void SpaceManager::verify() { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2464 // If there are blocks in the dictionary, then |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2465 // verfication of chunks does not work since |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2466 // being in the dictionary alters a chunk. |
6885 | 2467 if (block_freelists()->total_size() == 0) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2468 for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2469 Metachunk* curr = chunks_in_use(i); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2470 while (curr != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2471 curr->verify(); |
7208
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2472 verify_chunk_size(curr); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2473 curr = curr->next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2474 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2475 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2476 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2477 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2478 |
7208
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2479 void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2480 assert(is_humongous(chunk->word_size()) || |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2481 chunk->word_size() == medium_chunk_size() || |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2482 chunk->word_size() == small_chunk_size() || |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2483 chunk->word_size() == specialized_chunk_size(), |
7208
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2484 "Chunk size is wrong"); |
eade6b2e4782
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
jmasa
parents:
7187
diff
changeset
|
2485 return; |
eade6b2e4782
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|
2486 } |
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|
2487 |
6725
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|
2488 #ifdef ASSERT |
10183
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|
2489 void SpaceManager::verify_allocated_blocks_words() { |
6725
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|
2490 // Verification is only guaranteed at a safepoint. |
10183
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|
2491 assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
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|
2492 "Verification can fail if the applications is running"); |
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|
2493 assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
8007
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mikael
parents:
7447
diff
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|
2494 err_msg("allocation total is not consistent " SIZE_FORMAT |
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|
2495 " vs " SIZE_FORMAT, |
10183
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2496 allocated_blocks_words(), sum_used_in_chunks_in_use())); |
6725
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|
2497 } |
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diff
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|
2498 |
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|
2499 #endif |
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|
2500 |
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|
2501 void SpaceManager::dump(outputStream* const out) const { |
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|
2502 size_t curr_total = 0; |
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|
2503 size_t waste = 0; |
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|
2504 uint i = 0; |
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|
2505 size_t used = 0; |
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diff
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|
2506 size_t capacity = 0; |
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|
2507 |
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|
2508 // Add up statistics for all chunks in this SpaceManager. |
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|
2509 for (ChunkIndex index = ZeroIndex; |
6885 | 2510 index < NumberOfInUseLists; |
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2511 index = next_chunk_index(index)) { |
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|
2512 for (Metachunk* curr = chunks_in_use(index); |
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|
2513 curr != NULL; |
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|
2514 curr = curr->next()) { |
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|
2515 out->print("%d) ", i++); |
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|
2516 curr->print_on(out); |
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|
2517 curr_total += curr->word_size(); |
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|
2518 used += curr->used_word_size(); |
12902 | 2519 capacity += curr->word_size(); |
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2520 waste += curr->free_word_size() + curr->overhead();; |
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|
2521 } |
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|
2522 } |
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|
2523 |
12239 | 2524 if (TraceMetadataChunkAllocation && Verbose) { |
2525 block_freelists()->print_on(out); | |
2526 } | |
2527 | |
7446
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|
2528 size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
6725
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diff
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|
2529 // Free space isn't wasted. |
da91efe96a93
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|
2530 waste -= free; |
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|
2531 |
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|
2532 out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
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|
2533 " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
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|
2534 " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
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|
2535 } |
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diff
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|
2536 |
7185
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coleenp
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6969
diff
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|
2537 #ifndef PRODUCT |
6725
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|
2538 void SpaceManager::mangle_freed_chunks() { |
7446
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|
2539 for (ChunkIndex index = ZeroIndex; |
6885 | 2540 index < NumberOfInUseLists; |
6725
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|
2541 index = next_chunk_index(index)) { |
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|
2542 for (Metachunk* curr = chunks_in_use(index); |
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|
2543 curr != NULL; |
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|
2544 curr = curr->next()) { |
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|
2545 curr->mangle(); |
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diff
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|
2546 } |
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diff
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|
2547 } |
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diff
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|
2548 } |
7185
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coleenp
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6969
diff
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|
2549 #endif // PRODUCT |
6725
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|
2550 |
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|
2551 // MetaspaceAux |
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|
2552 |
10183
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|
2553 |
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|
2554 size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
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|
2555 size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
10183
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|
2556 |
12063
1a8fb39bdbc4
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12056
diff
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|
2557 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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|
2558 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
1a8fb39bdbc4
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12056
diff
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|
2559 return list == NULL ? 0 : list->free_bytes(); |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
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|
2560 } |
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
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12056
diff
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|
2561 |
10183
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10175
diff
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|
2562 size_t MetaspaceAux::free_bytes() { |
12063
1a8fb39bdbc4
8014659: NPG: performance counters for compressed klass space
ehelin
parents:
12056
diff
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|
2563 return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
10183
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jmasa
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10175
diff
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|
2564 } |
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|
2565 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
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|
2566 void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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10175
diff
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|
2567 assert_lock_strong(SpaceManager::expand_lock()); |
10330
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10191
diff
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|
2568 assert(words <= allocated_capacity_words(mdtype), |
10183
868d87ed63c8
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10175
diff
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|
2569 err_msg("About to decrement below 0: words " SIZE_FORMAT |
10330
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10191
diff
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|
2570 " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
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10191
diff
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|
2571 words, mdtype, allocated_capacity_words(mdtype))); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
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10191
diff
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|
2572 _allocated_capacity_words[mdtype] -= words; |
10183
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10175
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|
2573 } |
868d87ed63c8
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|
2574 |
10330
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8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
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|
2575 void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
10183
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10175
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|
2576 assert_lock_strong(SpaceManager::expand_lock()); |
868d87ed63c8
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10175
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|
2577 // Needs to be atomic |
10330
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10191
diff
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|
2578 _allocated_capacity_words[mdtype] += words; |
10183
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|
2579 } |
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|
2580 |
10330
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diff
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|
2581 void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
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10191
diff
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|
2582 assert(words <= allocated_used_words(mdtype), |
10183
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10175
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|
2583 err_msg("About to decrement below 0: words " SIZE_FORMAT |
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10191
diff
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|
2584 " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
2b1a9d972fc2
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10191
diff
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|
2585 words, mdtype, allocated_used_words(mdtype))); |
10183
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10175
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|
2586 // For CMS deallocation of the Metaspaces occurs during the |
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10175
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|
2587 // sweep which is a concurrent phase. Protection by the expand_lock() |
868d87ed63c8
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10175
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|
2588 // is not enough since allocation is on a per Metaspace basis |
868d87ed63c8
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|
2589 // and protected by the Metaspace lock. |
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10175
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|
2590 jlong minus_words = (jlong) - (jlong) words; |
10330
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jmasa
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10191
diff
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|
2591 Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
10183
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|
2592 } |
868d87ed63c8
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|
2593 |
10330
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diff
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|
2594 void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
10183
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|
2595 // _allocated_used_words tracks allocations for |
868d87ed63c8
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10175
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|
2596 // each piece of metadata. Those allocations are |
868d87ed63c8
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10175
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|
2597 // generally done concurrently by different application |
868d87ed63c8
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10175
diff
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|
2598 // threads so must be done atomically. |
10330
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diff
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|
2599 Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
10183
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|
2600 } |
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|
2601 |
868d87ed63c8
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|
2602 size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
6730
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6726
diff
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|
2603 size_t used = 0; |
5d2156bcb78b
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6726
diff
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|
2604 ClassLoaderDataGraphMetaspaceIterator iter; |
5d2156bcb78b
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6726
diff
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|
2605 while (iter.repeat()) { |
5d2156bcb78b
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6726
diff
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|
2606 Metaspace* msp = iter.get_next(); |
10183
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|
2607 // Sum allocated_blocks_words for each metaspace |
6730
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6726
diff
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|
2608 if (msp != NULL) { |
10183
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10175
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|
2609 used += msp->used_words_slow(mdtype); |
6730
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6726
diff
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|
2610 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2611 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2612 return used * BytesPerWord; |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2613 } |
5d2156bcb78b
7195789: NPG: assert(used + free == capacity) failed: Accounting is wrong
jmasa
parents:
6726
diff
changeset
|
2614 |
12235 | 2615 size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2616 size_t free = 0; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2617 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2618 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2619 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2620 if (msp != NULL) { |
12235 | 2621 free += msp->free_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2622 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2623 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2624 return free * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2625 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2626 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2627 size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2628 if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2629 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2630 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2631 // Don't count the space in the freelists. That space will be |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2632 // added to the capacity calculation as needed. |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2633 size_t capacity = 0; |
6725
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2634 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2635 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2636 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2637 if (msp != NULL) { |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2638 capacity += msp->capacity_words_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2639 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2640 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2641 return capacity * BytesPerWord; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2642 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2643 |
12235 | 2644 size_t MetaspaceAux::capacity_bytes_slow() { |
2645 #ifdef PRODUCT | |
2646 // Use allocated_capacity_bytes() in PRODUCT instead of this function. | |
2647 guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); | |
2648 #endif | |
2649 size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); | |
2650 size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); | |
2651 assert(allocated_capacity_bytes() == class_capacity + non_class_capacity, | |
2652 err_msg("bad accounting: allocated_capacity_bytes() " SIZE_FORMAT | |
2653 " class_capacity + non_class_capacity " SIZE_FORMAT | |
2654 " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, | |
2655 allocated_capacity_bytes(), class_capacity + non_class_capacity, | |
2656 class_capacity, non_class_capacity)); | |
2657 | |
2658 return class_capacity + non_class_capacity; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2659 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2660 |
12235 | 2661 size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
2662 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); | |
12236
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2663 return list == NULL ? 0 : list->reserved_bytes(); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2664 } |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2665 |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2666 size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2667 VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
c4c768305a8f
8024638: Count and expose the amount of committed memory in the metaspaces
stefank
parents:
12235
diff
changeset
|
2668 return list == NULL ? 0 : list->committed_bytes(); |
12235 | 2669 } |
2670 | |
2671 size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } | |
2672 | |
2673 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
|
2674 ChunkManager* chunk_manager = Metaspace::get_chunk_manager(mdtype); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2675 if (chunk_manager == NULL) { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2676 return 0; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2677 } |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2678 chunk_manager->slow_verify(); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2679 return chunk_manager->free_chunks_total_words(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2680 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2681 |
12235 | 2682 size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
2683 return free_chunks_total_words(mdtype) * BytesPerWord; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2684 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2685 |
12235 | 2686 size_t MetaspaceAux::free_chunks_total_words() { |
2687 return free_chunks_total_words(Metaspace::ClassType) + | |
2688 free_chunks_total_words(Metaspace::NonClassType); | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2689 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2690 |
12235 | 2691 size_t MetaspaceAux::free_chunks_total_bytes() { |
2692 return free_chunks_total_words() * BytesPerWord; | |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2693 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2694 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2695 void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2696 gclog_or_tty->print(", [Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2697 if (PrintGCDetails && Verbose) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2698 gclog_or_tty->print(" " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2699 "->" SIZE_FORMAT |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2700 "(" SIZE_FORMAT ")", |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2701 prev_metadata_used, |
11037
df7e1c0e3dc1
8014546: MetaspaceAux print_metaspace_change() should print "used" after GC not capacity
jmasa
parents:
10376
diff
changeset
|
2702 allocated_used_bytes(), |
12235 | 2703 reserved_bytes()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2704 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2705 gclog_or_tty->print(" " SIZE_FORMAT "K" |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2706 "->" SIZE_FORMAT "K" |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2707 "(" SIZE_FORMAT "K)", |
12235 | 2708 prev_metadata_used/K, |
2709 allocated_used_bytes()/K, | |
2710 reserved_bytes()/K); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2711 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2712 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2713 gclog_or_tty->print("]"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2714 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2715 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2716 // This is printed when PrintGCDetails |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2717 void MetaspaceAux::print_on(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2718 Metaspace::MetadataType nct = Metaspace::NonClassType; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2719 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2720 out->print_cr(" Metaspace " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2721 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2722 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2723 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2724 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2725 allocated_used_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2726 allocated_capacity_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2727 committed_bytes()/K, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2728 reserved_bytes()/K); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2729 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2730 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2731 Metaspace::MetadataType ct = Metaspace::ClassType; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2732 out->print_cr(" class space " |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2733 "used " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2734 "capacity " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2735 "committed " SIZE_FORMAT "K, " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2736 "reserved " SIZE_FORMAT "K", |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2737 allocated_used_bytes(ct)/K, |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2738 allocated_capacity_bytes(ct)/K, |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2739 committed_bytes(ct)/K, |
12235 | 2740 reserved_bytes(ct)/K); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2741 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2742 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2743 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2744 // Print information for class space and data space separately. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2745 // This is almost the same as above. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2746 void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
12235 | 2747 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
|
2748 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
|
2749 size_t used_bytes = used_bytes_slow(mdtype); |
12235 | 2750 size_t free_bytes = free_bytes_slow(mdtype); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2751 size_t used_and_free = used_bytes + free_bytes + |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2752 free_chunks_capacity_bytes; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2753 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
|
2754 "K + unused in chunks " SIZE_FORMAT "K + " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2755 " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2756 "K capacity in allocated chunks " SIZE_FORMAT "K", |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2757 used_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2758 free_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2759 free_chunks_capacity_bytes / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2760 used_and_free / K, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2761 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
|
2762 // 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
|
2763 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
|
2764 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2765 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2766 // Print total fragmentation for class metaspaces |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2767 void MetaspaceAux::print_class_waste(outputStream* out) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2768 assert(Metaspace::using_class_space(), "class metaspace not used"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2769 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
|
2770 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
|
2771 ClassLoaderDataGraphMetaspaceIterator iter; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2772 while (iter.repeat()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2773 Metaspace* msp = iter.get_next(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2774 if (msp != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2775 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
|
2776 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
|
2777 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
|
2778 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
|
2779 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
|
2780 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
|
2781 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
|
2782 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2783 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2784 out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2785 SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2786 SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2787 "large count " SIZE_FORMAT, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2788 cls_specialized_count, cls_specialized_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2789 cls_small_count, cls_small_waste, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2790 cls_medium_count, cls_medium_waste, cls_humongous_count); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2791 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2792 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2793 // 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
|
2794 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
|
2795 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
|
2796 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
|
2797 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2798 ClassLoaderDataGraphMetaspaceIterator iter; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2799 while (iter.repeat()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2800 Metaspace* msp = iter.get_next(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2801 if (msp != NULL) { |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2802 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
|
2803 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
|
2804 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
|
2805 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
|
2806 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
|
2807 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
|
2808 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
|
2809 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2810 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2811 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
|
2812 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
|
2813 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
|
2814 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
|
2815 "large count " SIZE_FORMAT, |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2816 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
|
2817 small_waste, medium_count, medium_waste, humongous_count); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2818 if (Metaspace::using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2819 print_class_waste(out); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2820 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2821 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2822 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2823 // Dump global metaspace things from the end of ClassLoaderDataGraph |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2824 void MetaspaceAux::dump(outputStream* out) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2825 out->print_cr("All Metaspace:"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2826 out->print("data space: "); print_on(out, Metaspace::NonClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2827 out->print("class space: "); print_on(out, Metaspace::ClassType); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2828 print_waste(out); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2829 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2830 |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2831 void MetaspaceAux::verify_free_chunks() { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2832 Metaspace::chunk_manager_metadata()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2833 if (Metaspace::using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2834 Metaspace::chunk_manager_class()->verify(); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2835 } |
6969
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2836 } |
6bc207d87e5d
7200229: NPG: possible performance issue exposed by closed/runtime/6559877/Test6559877.java
mgerdin
parents:
6885
diff
changeset
|
2837 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2838 void MetaspaceAux::verify_capacity() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2839 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2840 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
|
2841 // 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
|
2842 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
|
2843 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
|
2844 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
|
2845 " capacity_bytes_slow()" SIZE_FORMAT, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2846 running_sum_capacity_bytes, capacity_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2847 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2848 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2849 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2850 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
|
2851 assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2852 err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2853 " capacity_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2854 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
|
2855 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2856 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2857 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2858 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2859 void MetaspaceAux::verify_used() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2860 #ifdef ASSERT |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2861 size_t running_sum_used_bytes = allocated_used_bytes(); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2862 // For purposes of the running sum of used, verify against used |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2863 size_t used_in_use_bytes = used_bytes_slow(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2864 assert(allocated_used_bytes() == used_in_use_bytes, |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2865 err_msg("allocated_used_bytes() " SIZE_FORMAT |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2866 " used_bytes_slow()" SIZE_FORMAT, |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2867 allocated_used_bytes(), used_in_use_bytes)); |
10330
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2868 for (Metaspace::MetadataType i = Metaspace::ClassType; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2869 i < Metaspace:: MetadataTypeCount; |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2870 i = (Metaspace::MetadataType)(i + 1)) { |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2871 size_t used_in_use_bytes = used_bytes_slow(i); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2872 assert(allocated_used_bytes(i) == used_in_use_bytes, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2873 err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2874 " used_bytes_slow(%u)" SIZE_FORMAT, |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2875 i, allocated_used_bytes(i), i, used_in_use_bytes)); |
2b1a9d972fc2
8014862: Add fast Metasapce capacity and used per MetadataType
jmasa
parents:
10191
diff
changeset
|
2876 } |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2877 #endif |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2878 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2879 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2880 void MetaspaceAux::verify_metrics() { |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2881 verify_capacity(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2882 verify_used(); |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2883 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2884 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
2885 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2886 // Metaspace methods |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2887 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2888 size_t Metaspace::_first_chunk_word_size = 0; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2889 size_t Metaspace::_first_class_chunk_word_size = 0; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
2890 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
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|
2891 size_t Metaspace::_commit_alignment = 0; |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
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|
2892 size_t Metaspace::_reserve_alignment = 0; |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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diff
changeset
|
2893 |
7446
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
2894 Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
e51c9860cf66
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jmasa
parents:
7435
diff
changeset
|
2895 initialize(lock, type); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2896 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2897 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2898 Metaspace::~Metaspace() { |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2899 delete _vsm; |
12056
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hseigel
parents:
11966
diff
changeset
|
2900 if (using_class_space()) { |
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parents:
11966
diff
changeset
|
2901 delete _class_vsm; |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2902 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2903 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2904 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2905 VirtualSpaceList* Metaspace::_space_list = NULL; |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
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|
2906 VirtualSpaceList* Metaspace::_class_space_list = NULL; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2907 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2908 ChunkManager* Metaspace::_chunk_manager_metadata = NULL; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2909 ChunkManager* Metaspace::_chunk_manager_class = NULL; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
2910 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2911 #define VIRTUALSPACEMULTIPLIER 2 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
2912 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2913 #ifdef _LP64 |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2914 void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2915 // Figure out the narrow_klass_base and the narrow_klass_shift. The |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2916 // narrow_klass_base is the lower of the metaspace base and the cds base |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2917 // (if cds is enabled). The narrow_klass_shift depends on the distance |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2918 // between the lower base and higher address. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2919 address lower_base; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2920 address higher_address; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2921 if (UseSharedSpaces) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2922 higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2923 (address)(metaspace_base + class_metaspace_size())); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2924 lower_base = MIN2(metaspace_base, cds_base); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2925 } else { |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2926 higher_address = metaspace_base + class_metaspace_size(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2927 lower_base = metaspace_base; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2928 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2929 Universe::set_narrow_klass_base(lower_base); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2930 if ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2931 Universe::set_narrow_klass_shift(0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2932 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2933 assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2934 Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2935 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2936 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2937 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2938 // Return TRUE if the specified metaspace_base and cds_base are close enough |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2939 // to work with compressed klass pointers. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2940 bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2941 assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2942 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2943 address lower_base = MIN2((address)metaspace_base, cds_base); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2944 address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2945 (address)(metaspace_base + class_metaspace_size())); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2946 return ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2947 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2948 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2949 // Try to allocate the metaspace at the requested addr. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2950 void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2951 assert(using_class_space(), "called improperly"); |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2952 assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2953 assert(class_metaspace_size() < KlassEncodingMetaspaceMax, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2954 "Metaspace size is too big"); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2955 assert_is_ptr_aligned(requested_addr, _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2956 assert_is_ptr_aligned(cds_base, _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2957 assert_is_size_aligned(class_metaspace_size(), _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2958 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2959 // Don't use large pages for the class space. |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2960 bool large_pages = false; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2961 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2962 ReservedSpace metaspace_rs = ReservedSpace(class_metaspace_size(), |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2963 _reserve_alignment, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2964 large_pages, |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2965 requested_addr, 0); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2966 if (!metaspace_rs.is_reserved()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2967 if (UseSharedSpaces) { |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2968 size_t increment = align_size_up(1*G, _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2969 |
12056
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2970 // Keep trying to allocate the metaspace, increasing the requested_addr |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2971 // by 1GB each time, until we reach an address that will no longer allow |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2972 // use of CDS with compressed klass pointers. |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2973 char *addr = requested_addr; |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2974 while (!metaspace_rs.is_reserved() && (addr + increment > addr) && |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2975 can_use_cds_with_metaspace_addr(addr + increment, cds_base)) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2976 addr = addr + increment; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2977 metaspace_rs = ReservedSpace(class_metaspace_size(), |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2978 _reserve_alignment, large_pages, addr, 0); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2979 } |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2980 } |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2981 |
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2982 // If no successful allocation then try to allocate the space anywhere. If |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2983 // that fails then OOM doom. At this point we cannot try allocating the |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2984 // metaspace as if UseCompressedClassPointers is off because too much |
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2985 // initialization has happened that depends on UseCompressedClassPointers. |
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
2986 // So, UseCompressedClassPointers cannot be turned off at this point. |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2987 if (!metaspace_rs.is_reserved()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2988 metaspace_rs = ReservedSpace(class_metaspace_size(), |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
2989 _reserve_alignment, large_pages); |
12056
740e263c80c6
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hseigel
parents:
11966
diff
changeset
|
2990 if (!metaspace_rs.is_reserved()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2991 vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2992 class_metaspace_size())); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2993 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
2994 } |
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2995 } |
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2996 |
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2997 // If we got here then the metaspace got allocated. |
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2998 MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
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2999 |
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3000 // Verify that we can use shared spaces. Otherwise, turn off CDS. |
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3001 if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
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3002 FileMapInfo::stop_sharing_and_unmap( |
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3003 "Could not allocate metaspace at a compatible address"); |
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3004 } |
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3005 |
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3006 set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
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3007 UseSharedSpaces ? (address)cds_base : 0); |
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3008 |
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3009 initialize_class_space(metaspace_rs); |
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3010 |
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3011 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
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3012 gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
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3013 Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
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3014 gclog_or_tty->print_cr("Metaspace Size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
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3015 class_metaspace_size(), metaspace_rs.base(), requested_addr); |
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3016 } |
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3017 } |
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3018 |
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3019 // For UseCompressedClassPointers the class space is reserved above the top of |
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3020 // the Java heap. The argument passed in is at the base of the compressed space. |
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3021 void Metaspace::initialize_class_space(ReservedSpace rs) { |
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3022 // The reserved space size may be bigger because of alignment, esp with UseLargePages |
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3023 assert(rs.size() >= CompressedClassSpaceSize, |
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3024 err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
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3025 assert(using_class_space(), "Must be using class space"); |
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3026 _class_space_list = new VirtualSpaceList(rs); |
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3027 _chunk_manager_class = new ChunkManager(SpecializedChunk, ClassSmallChunk, ClassMediumChunk); |
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3028 |
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3029 if (!_class_space_list->initialization_succeeded()) { |
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3030 vm_exit_during_initialization("Failed to setup compressed class space virtual space list."); |
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3031 } |
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3032 } |
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3033 |
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3034 #endif |
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3035 |
12838
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3036 // Align down. If the aligning result in 0, return 'alignment'. |
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3037 static size_t restricted_align_down(size_t size, size_t alignment) { |
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3038 return MAX2(alignment, align_size_down_(size, alignment)); |
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3039 } |
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3040 |
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3041 void Metaspace::ergo_initialize() { |
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3042 if (DumpSharedSpaces) { |
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3043 // Using large pages when dumping the shared archive is currently not implemented. |
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3044 FLAG_SET_ERGO(bool, UseLargePagesInMetaspace, false); |
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3045 } |
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3046 |
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3047 size_t page_size = os::vm_page_size(); |
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3048 if (UseLargePages && UseLargePagesInMetaspace) { |
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3049 page_size = os::large_page_size(); |
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3050 } |
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3051 |
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3052 _commit_alignment = page_size; |
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3053 _reserve_alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity()); |
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3054 |
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3055 // Do not use FLAG_SET_ERGO to update MaxMetaspaceSize, since this will |
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3056 // override if MaxMetaspaceSize was set on the command line or not. |
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3057 // This information is needed later to conform to the specification of the |
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3058 // java.lang.management.MemoryUsage API. |
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3059 // |
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3060 // Ideally, we would be able to set the default value of MaxMetaspaceSize in |
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3061 // globals.hpp to the aligned value, but this is not possible, since the |
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3062 // alignment depends on other flags being parsed. |
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3063 MaxMetaspaceSize = restricted_align_down(MaxMetaspaceSize, _reserve_alignment); |
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3064 |
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3065 if (MetaspaceSize > MaxMetaspaceSize) { |
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3066 MetaspaceSize = MaxMetaspaceSize; |
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3067 } |
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3068 |
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3069 MetaspaceSize = restricted_align_down(MetaspaceSize, _commit_alignment); |
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3070 |
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3071 assert(MetaspaceSize <= MaxMetaspaceSize, "MetaspaceSize should be limited by MaxMetaspaceSize"); |
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3072 |
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3073 if (MetaspaceSize < 256*K) { |
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3074 vm_exit_during_initialization("Too small initial Metaspace size"); |
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3075 } |
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3076 |
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3077 MinMetaspaceExpansion = restricted_align_down(MinMetaspaceExpansion, _commit_alignment); |
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3078 MaxMetaspaceExpansion = restricted_align_down(MaxMetaspaceExpansion, _commit_alignment); |
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3079 |
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3080 CompressedClassSpaceSize = restricted_align_down(CompressedClassSpaceSize, _reserve_alignment); |
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3081 set_class_metaspace_size(CompressedClassSpaceSize); |
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3082 } |
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3083 |
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3084 void Metaspace::global_initialize() { |
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|
3085 // Initialize the alignment for shared spaces. |
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3086 int max_alignment = os::vm_page_size(); |
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3087 size_t cds_total = 0; |
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3088 |
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3089 MetaspaceShared::set_max_alignment(max_alignment); |
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3090 |
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3091 if (DumpSharedSpaces) { |
12838
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3092 SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
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3093 SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
12838
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3094 SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
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3095 SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
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3096 |
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|
3097 // Initialize with the sum of the shared space sizes. The read-only |
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3098 // and read write metaspace chunks will be allocated out of this and the |
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3099 // remainder is the misc code and data chunks. |
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3100 cds_total = FileMapInfo::shared_spaces_size(); |
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3101 cds_total = align_size_up(cds_total, _reserve_alignment); |
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3102 _space_list = new VirtualSpaceList(cds_total/wordSize); |
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3103 _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
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3104 |
12838
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3105 if (!_space_list->initialization_succeeded()) { |
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3106 vm_exit_during_initialization("Unable to dump shared archive.", NULL); |
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3107 } |
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|
3108 |
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|
3109 #ifdef _LP64 |
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3110 if (cds_total + class_metaspace_size() > (uint64_t)max_juint) { |
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3111 vm_exit_during_initialization("Unable to dump shared archive.", |
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3112 err_msg("Size of archive (" SIZE_FORMAT ") + compressed class space (" |
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12340
diff
changeset
|
3113 SIZE_FORMAT ") == total (" SIZE_FORMAT ") is larger than compressed " |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3114 "klass limit: " SIZE_FORMAT, cds_total, class_metaspace_size(), |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3115 cds_total + class_metaspace_size(), (size_t)max_juint)); |
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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3116 } |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3117 |
12056
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8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3118 // Set the compressed klass pointer base so that decoding of these pointers works |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3119 // properly when creating the shared archive. |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3120 assert(UseCompressedOops && UseCompressedClassPointers, |
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3121 "UseCompressedOops and UseCompressedClassPointers must be set"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3122 Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3123 if (TraceMetavirtualspaceAllocation && Verbose) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3124 gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3125 _space_list->current_virtual_space()->bottom()); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3126 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3127 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3128 Universe::set_narrow_klass_shift(0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3129 #endif |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3130 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3131 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3132 // If using shared space, open the file that contains the shared space |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3133 // and map in the memory before initializing the rest of metaspace (so |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3134 // the addresses don't conflict) |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3135 address cds_address = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3136 if (UseSharedSpaces) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3137 FileMapInfo* mapinfo = new FileMapInfo(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3138 memset(mapinfo, 0, sizeof(FileMapInfo)); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3139 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3140 // 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
|
3141 // initialization fails, shared spaces [UseSharedSpaces] are |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3142 // disabled and the file is closed. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3143 // Map in spaces now also |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3144 if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3145 FileMapInfo::set_current_info(mapinfo); |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
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parents:
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diff
changeset
|
3146 cds_total = FileMapInfo::shared_spaces_size(); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3147 cds_address = (address)mapinfo->region_base(0); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3148 } else { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3149 assert(!mapinfo->is_open() && !UseSharedSpaces, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3150 "archive file not closed or shared spaces not disabled."); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3151 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3152 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3153 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3154 #ifdef _LP64 |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3155 // If UseCompressedClassPointers is set then allocate the metaspace area |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3156 // above the heap and above the CDS area (if it exists). |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3157 if (using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3158 if (UseSharedSpaces) { |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3159 char* cds_end = (char*)(cds_address + cds_total); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3160 cds_end = (char *)align_ptr_up(cds_end, _reserve_alignment); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3161 allocate_metaspace_compressed_klass_ptrs(cds_end, cds_address); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3162 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3163 allocate_metaspace_compressed_klass_ptrs((char *)CompressedKlassPointersBase, 0); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3164 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3165 } |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3166 #endif |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3167 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3168 // Initialize these before initializing the VirtualSpaceList |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3169 _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3170 _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
|
3171 // 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
|
3172 // on the medium chunk list. The next chunk will be small and progress |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3173 // from there. This size calculated by -version. |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3174 _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
|
3175 (CompressedClassSpaceSize/BytesPerWord)*2); |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3176 _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
|
3177 // Arbitrarily set the initial virtual space to a multiple |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3178 // of the boot class loader size. |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3179 size_t word_size = VIRTUALSPACEMULTIPLIER * _first_chunk_word_size; |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3180 word_size = align_size_up(word_size, Metaspace::reserve_alignment_words()); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3181 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3182 // Initialize the list of virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3183 _space_list = new VirtualSpaceList(word_size); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3184 _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
|
3185 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3186 if (!_space_list->initialization_succeeded()) { |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3187 vm_exit_during_initialization("Unable to setup metadata virtual space list.", NULL); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3188 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3189 } |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3190 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3191 MetaspaceGC::initialize(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3192 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3193 |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3194 Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3195 size_t chunk_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3196 size_t chunk_bunch) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3197 // Get a chunk from the chunk freelist |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3198 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
|
3199 if (chunk != NULL) { |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3200 return chunk; |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3201 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3202 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3203 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
|
3204 } |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3205 |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3206 void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3207 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3208 assert(space_list() != NULL, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3209 "Metadata VirtualSpaceList has not been initialized"); |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3210 assert(chunk_manager_metadata() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3211 "Metadata ChunkManager has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3212 |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3213 _vsm = new SpaceManager(NonClassType, lock); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3214 if (_vsm == NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3215 return; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3216 } |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3217 size_t word_size; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3218 size_t class_word_size; |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3219 vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3220 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3221 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3222 assert(class_space_list() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3223 "Class VirtualSpaceList has not been initialized"); |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3224 assert(chunk_manager_class() != NULL, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3225 "Class ChunkManager has not been initialized"); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3226 |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3227 // Allocate SpaceManager for classes. |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3228 _class_vsm = new SpaceManager(ClassType, lock); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3229 if (_class_vsm == NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3230 return; |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3231 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3232 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3233 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3234 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
|
3235 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3236 // Allocate chunk for metadata objects |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3237 Metachunk* new_chunk = get_initialization_chunk(NonClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3238 word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3239 vsm()->medium_chunk_bunch()); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3240 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
|
3241 if (new_chunk != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3242 // 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
|
3243 vsm()->add_chunk(new_chunk, true); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3244 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3245 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3246 // Allocate chunk for class metadata objects |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3247 if (using_class_space()) { |
12303
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3248 Metachunk* class_chunk = get_initialization_chunk(ClassType, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3249 class_word_size, |
b960c9df4f11
8025096: Move the ChunkManager instances out of the VirtualSpaceLists
stefank
parents:
12302
diff
changeset
|
3250 class_vsm()->medium_chunk_bunch()); |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3251 if (class_chunk != NULL) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3252 class_vsm()->add_chunk(class_chunk, true); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3253 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3254 } |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3255 |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3256 _alloc_record_head = NULL; |
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3257 _alloc_record_tail = NULL; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3258 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3259 |
7446
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3260 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
|
3261 size_t byte_size = word_size * wordSize; |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3262 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
|
3263 } |
e51c9860cf66
8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders
jmasa
parents:
7435
diff
changeset
|
3264 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3265 MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3266 // DumpSharedSpaces doesn't use class metadata area (yet) |
12226
7944aba7ba41
8015107: NPG: Use consistent naming for metaspace concepts
ehelin
parents:
12110
diff
changeset
|
3267 // 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
|
3268 if (is_class_space_allocation(mdtype)) { |
6885 | 3269 return class_vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3270 } else { |
6885 | 3271 return vsm()->allocate(word_size); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3272 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3273 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3274 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3275 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
|
3276 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
|
3277 assert(delta_bytes > 0, "Must be"); |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3278 |
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3279 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
|
3280 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
|
3281 |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3282 if (PrintGCDetails && Verbose) { |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3283 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
|
3284 " to " SIZE_FORMAT, before_inc, after_inc); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3285 } |
6885 | 3286 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3287 return allocate(word_size, mdtype); |
6753
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3288 } |
8da5e203b993
7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently
jmasa
parents:
6736
diff
changeset
|
3289 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3290 // Space allocated in the Metaspace. This may |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3291 // be across several metadata virtual spaces. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3292 char* Metaspace::bottom() const { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3293 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
|
3294 return (char*)vsm()->current_chunk()->bottom(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3295 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3296 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3297 size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3298 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3299 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
|
3300 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3301 return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3302 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3303 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3304 |
12235 | 3305 size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3306 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3307 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
|
3308 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3309 return vsm()->sum_free_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3310 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3311 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3312 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3313 // Space capacity in the Metaspace. It includes |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3314 // space in the list of chunks from which allocations |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3315 // 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
|
3316 // in the space available in the dictionary which |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3317 // is already counted in some chunk. |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3318 size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3319 if (mdtype == ClassType) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3320 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
|
3321 } else { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3322 return vsm()->sum_capacity_in_chunks_in_use(); |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3323 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3324 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3325 |
10183
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3326 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
|
3327 return used_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3328 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3329 |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3330 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
|
3331 return capacity_words_slow(mdtype) * BytesPerWord; |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3332 } |
868d87ed63c8
8008966: NPG: Inefficient Metaspace counter functions cause large young GC regressions
jmasa
parents:
10175
diff
changeset
|
3333 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3334 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
|
3335 if (SafepointSynchronize::is_at_safepoint()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3336 assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
6885 | 3337 // 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
|
3338 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6885 | 3339 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3340 // Dark matter. Too small for dictionary. | |
3341 #ifdef ASSERT | |
3342 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3343 #endif | |
3344 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3345 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3346 if (is_class && using_class_space()) { |
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3347 class_vsm()->deallocate(ptr, word_size); |
6885 | 3348 } else { |
3349 vsm()->deallocate(ptr, word_size); | |
3350 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3351 } else { |
10191
601183f604b2
8013129: Possible deadlock with Metaspace locks due to mixed usage of safepoint aware and non-safepoint aware locking
mgerdin
parents:
10183
diff
changeset
|
3352 MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3353 |
6885 | 3354 if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
3355 // Dark matter. Too small for dictionary. | |
3356 #ifdef ASSERT | |
3357 Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); | |
3358 #endif | |
3359 return; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3360 } |
12056
740e263c80c6
8003424: Enable Class Data Sharing for CompressedOops
hseigel
parents:
11966
diff
changeset
|
3361 if (is_class && using_class_space()) { |
6885 | 3362 class_vsm()->deallocate(ptr, word_size); |
3363 } else { | |
3364 vsm()->deallocate(ptr, word_size); | |
3365 } | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3366 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3367 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3368 |
12838
85c1ca43713f
8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces
stefank
parents:
12340
diff
changeset
|
3369 |
12902 | 3370 MetaWord* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
10376
a1ebd310d5c1
8014912: Restore PrintSharedSpaces functionality after NPG
iklam
parents:
10330
diff
changeset
|
3371 bool read_only, MetaspaceObj::Type type, TRAPS) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3372 if (HAS_PENDING_EXCEPTION) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3373 assert(false, "Should not allocate with exception pending"); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3374 return NULL; // caller does a CHECK_NULL too |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3375 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3376 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
diff
changeset
|
3377 assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
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3378 "ClassLoaderData::the_null_class_loader_data() should have been used."); |
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3379 |
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3380 // Allocate in metaspaces without taking out a lock, because it deadlocks |
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3381 // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
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|
3382 // to revisit this for application class data sharing. |
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|
3383 if (DumpSharedSpaces) { |
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3384 assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
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3385 Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
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3386 MetaWord* result = space->allocate(word_size, NonClassType); |
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3387 if (result == NULL) { |
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|
3388 report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
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|
3389 } |
12902 | 3390 |
3391 space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); | |
3392 | |
3393 // Zero initialize. | |
3394 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3395 | |
3396 return result; | |
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|
3397 } |
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|
3398 |
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3399 MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
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3400 |
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|
3401 // Try to allocate metadata. |
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3402 MetaWord* result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
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3403 |
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3404 if (result == NULL) { |
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|
3405 // Allocation failed. |
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|
3406 if (is_init_completed()) { |
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3407 // Only start a GC if the bootstrapping has completed. |
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3408 |
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|
3409 // Try to clean out some memory and retry. |
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3410 result = Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
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3411 loader_data, word_size, mdtype); |
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3412 } |
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|
3413 } |
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|
3414 |
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|
3415 if (result == NULL) { |
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|
3416 report_metadata_oome(loader_data, word_size, mdtype, THREAD); |
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|
3417 // Will not reach here. |
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|
3418 return NULL; |
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|
3419 } |
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|
3420 |
12902 | 3421 // Zero initialize. |
3422 Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); | |
3423 | |
3424 return result; | |
12838
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|
3425 } |
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|
3426 |
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|
3427 void Metaspace::report_metadata_oome(ClassLoaderData* loader_data, size_t word_size, MetadataType mdtype, TRAPS) { |
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3428 // If result is still null, we are out of memory. |
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3429 if (Verbose && TraceMetadataChunkAllocation) { |
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3430 gclog_or_tty->print_cr("Metaspace allocation failed for size " |
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3431 SIZE_FORMAT, word_size); |
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|
3432 if (loader_data->metaspace_or_null() != NULL) { |
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3433 loader_data->dump(gclog_or_tty); |
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|
3434 } |
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|
3435 MetaspaceAux::dump(gclog_or_tty); |
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|
3436 } |
12838
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|
3437 |
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|
3438 // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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|
3439 const char* space_string = is_class_space_allocation(mdtype) ? "Compressed class space" : |
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|
3440 "Metadata space"; |
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|
3441 report_java_out_of_memory(space_string); |
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|
3442 |
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|
3443 if (JvmtiExport::should_post_resource_exhausted()) { |
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|
3444 JvmtiExport::post_resource_exhausted( |
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3445 JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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|
3446 space_string); |
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|
3447 } |
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|
3448 |
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|
3449 if (!is_init_completed()) { |
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|
3450 vm_exit_during_initialization("OutOfMemoryError", space_string); |
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|
3451 } |
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|
3452 |
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|
3453 if (is_class_space_allocation(mdtype)) { |
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|
3454 THROW_OOP(Universe::out_of_memory_error_class_metaspace()); |
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|
3455 } else { |
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|
3456 THROW_OOP(Universe::out_of_memory_error_metaspace()); |
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|
3457 } |
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|
3458 } |
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|
3459 |
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|
3460 void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
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|
3461 assert(DumpSharedSpaces, "sanity"); |
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|
3462 |
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|
3463 AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
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3464 if (_alloc_record_head == NULL) { |
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|
3465 _alloc_record_head = _alloc_record_tail = rec; |
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|
3466 } else { |
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|
3467 _alloc_record_tail->_next = rec; |
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|
3468 _alloc_record_tail = rec; |
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|
3469 } |
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|
3470 } |
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|
3471 |
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|
3472 void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
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|
3473 assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
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|
3474 |
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|
3475 address last_addr = (address)bottom(); |
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|
3476 |
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|
3477 for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
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|
3478 address ptr = rec->_ptr; |
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|
3479 if (last_addr < ptr) { |
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|
3480 closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
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|
3481 } |
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|
3482 closure->doit(ptr, rec->_type, rec->_byte_size); |
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|
3483 last_addr = ptr + rec->_byte_size; |
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|
3484 } |
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|
3485 |
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|
3486 address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
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|
3487 if (last_addr < top) { |
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|
3488 closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
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|
3489 } |
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|
3490 } |
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|
3491 |
12303
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|
3492 void Metaspace::purge(MetadataType mdtype) { |
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|
3493 get_space_list(mdtype)->purge(get_chunk_manager(mdtype)); |
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|
3494 } |
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|
3495 |
10175 | 3496 void Metaspace::purge() { |
3497 MutexLockerEx cl(SpaceManager::expand_lock(), | |
3498 Mutex::_no_safepoint_check_flag); | |
12303
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|
3499 purge(NonClassType); |
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changeset
|
3500 if (using_class_space()) { |
12303
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|
3501 purge(ClassType); |
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|
3502 } |
10175 | 3503 } |
3504 | |
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|
3505 void Metaspace::print_on(outputStream* out) const { |
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diff
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|
3506 // Print both class virtual space counts and metaspace. |
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|
3507 if (Verbose) { |
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hseigel
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diff
changeset
|
3508 vsm()->print_on(out); |
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|
3509 if (using_class_space()) { |
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|
3510 class_vsm()->print_on(out); |
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|
3511 } |
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|
3512 } |
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3513 } |
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3514 |
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3515 bool Metaspace::contains(const void * ptr) { |
6725
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3516 if (MetaspaceShared::is_in_shared_space(ptr)) { |
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3517 return true; |
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3518 } |
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3519 // This is checked while unlocked. As long as the virtualspaces are added |
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3520 // at the end, the pointer will be in one of them. The virtual spaces |
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3521 // aren't deleted presently. When they are, some sort of locking might |
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3522 // be needed. Note, locking this can cause inversion problems with the |
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3523 // caller in MetaspaceObj::is_metadata() function. |
10175 | 3524 return space_list()->contains(ptr) || |
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3525 (using_class_space() && class_space_list()->contains(ptr)); |
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3526 } |
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3527 |
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3528 void Metaspace::verify() { |
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3529 vsm()->verify(); |
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3530 if (using_class_space()) { |
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3531 class_vsm()->verify(); |
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3532 } |
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3533 } |
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3534 |
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3535 void Metaspace::dump(outputStream* const out) const { |
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3536 out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
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3537 vsm()->dump(out); |
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3538 if (using_class_space()) { |
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3539 out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
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3540 class_vsm()->dump(out); |
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3541 } |
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3542 } |
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3543 |
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3544 /////////////// Unit tests /////////////// |
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3545 |
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3546 #ifndef PRODUCT |
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3547 |
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3548 class TestMetaspaceAuxTest : AllStatic { |
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3549 public: |
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3550 static void test_reserved() { |
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3551 size_t reserved = MetaspaceAux::reserved_bytes(); |
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3552 |
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3553 assert(reserved > 0, "assert"); |
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3554 |
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3555 size_t committed = MetaspaceAux::committed_bytes(); |
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3556 assert(committed <= reserved, "assert"); |
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3557 |
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3558 size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
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3559 assert(reserved_metadata > 0, "assert"); |
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3560 assert(reserved_metadata <= reserved, "assert"); |
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3561 |
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3562 if (UseCompressedClassPointers) { |
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3563 size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
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3564 assert(reserved_class > 0, "assert"); |
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3565 assert(reserved_class < reserved, "assert"); |
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3566 } |
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3567 } |
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3568 |
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3569 static void test_committed() { |
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3570 size_t committed = MetaspaceAux::committed_bytes(); |
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3571 |
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3572 assert(committed > 0, "assert"); |
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3573 |
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3574 size_t reserved = MetaspaceAux::reserved_bytes(); |
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3575 assert(committed <= reserved, "assert"); |
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3576 |
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3577 size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
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3578 assert(committed_metadata > 0, "assert"); |
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3579 assert(committed_metadata <= committed, "assert"); |
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3580 |
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3581 if (UseCompressedClassPointers) { |
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3582 size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
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3583 assert(committed_class > 0, "assert"); |
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3584 assert(committed_class < committed, "assert"); |
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3585 } |
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3586 } |
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3587 |
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|
3588 static void test_virtual_space_list_large_chunk() { |
03f493ce3a71
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3589 VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity()); |
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|
3590 MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
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|
3591 // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be |
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|
3592 // vm_allocation_granularity aligned on Windows. |
03f493ce3a71
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|
3593 size_t large_size = (size_t)(2*256*K + (os::vm_page_size()/BytesPerWord)); |
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|
3594 large_size += (os::vm_page_size()/BytesPerWord); |
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brutisso
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|
3595 vs_list->get_new_chunk(large_size, large_size, 0); |
03f493ce3a71
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|
3596 } |
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|
3597 |
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3598 static void test() { |
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|
3599 test_reserved(); |
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|
3600 test_committed(); |
12306
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3601 test_virtual_space_list_large_chunk(); |
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3602 } |
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3603 }; |
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3604 |
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|
3605 void TestMetaspaceAux_test() { |
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3606 TestMetaspaceAuxTest::test(); |
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3607 } |
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3608 |
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3609 #endif |