Thu, 26 Sep 2013 12:18:21 +0200
Merge
coleenp@4037 | 1 | /* |
coleenp@4712 | 2 | * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
coleenp@4037 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
coleenp@4037 | 4 | * |
coleenp@4037 | 5 | * This code is free software; you can redistribute it and/or modify it |
coleenp@4037 | 6 | * under the terms of the GNU General Public License version 2 only, as |
coleenp@4037 | 7 | * published by the Free Software Foundation. |
coleenp@4037 | 8 | * |
coleenp@4037 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
coleenp@4037 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
coleenp@4037 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
coleenp@4037 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
coleenp@4037 | 13 | * accompanied this code). |
coleenp@4037 | 14 | * |
coleenp@4037 | 15 | * You should have received a copy of the GNU General Public License version |
coleenp@4037 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
coleenp@4037 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
coleenp@4037 | 18 | * |
coleenp@4037 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
coleenp@4037 | 20 | * or visit www.oracle.com if you need additional information or have any |
coleenp@4037 | 21 | * questions. |
coleenp@4037 | 22 | * |
coleenp@4037 | 23 | */ |
coleenp@4037 | 24 | #include "precompiled.hpp" |
coleenp@4037 | 25 | #include "gc_interface/collectedHeap.hpp" |
stefank@5771 | 26 | #include "memory/allocation.hpp" |
coleenp@4037 | 27 | #include "memory/binaryTreeDictionary.hpp" |
jmasa@4196 | 28 | #include "memory/freeList.hpp" |
coleenp@4037 | 29 | #include "memory/collectorPolicy.hpp" |
coleenp@4037 | 30 | #include "memory/filemap.hpp" |
coleenp@4037 | 31 | #include "memory/freeList.hpp" |
jmasa@4196 | 32 | #include "memory/metablock.hpp" |
jmasa@4196 | 33 | #include "memory/metachunk.hpp" |
coleenp@4037 | 34 | #include "memory/metaspace.hpp" |
coleenp@4037 | 35 | #include "memory/metaspaceShared.hpp" |
coleenp@4037 | 36 | #include "memory/resourceArea.hpp" |
coleenp@4037 | 37 | #include "memory/universe.hpp" |
coleenp@4037 | 38 | #include "runtime/globals.hpp" |
hseigel@5528 | 39 | #include "runtime/java.hpp" |
coleenp@4037 | 40 | #include "runtime/mutex.hpp" |
coleenp@4295 | 41 | #include "runtime/orderAccess.hpp" |
coleenp@4037 | 42 | #include "services/memTracker.hpp" |
coleenp@4037 | 43 | #include "utilities/copy.hpp" |
coleenp@4037 | 44 | #include "utilities/debug.hpp" |
coleenp@4037 | 45 | |
jmasa@4196 | 46 | typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
jmasa@4196 | 47 | typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; |
mgerdin@4264 | 48 | // Define this macro to enable slow integrity checking of |
mgerdin@4264 | 49 | // the free chunk lists |
mgerdin@4264 | 50 | const bool metaspace_slow_verify = false; |
mgerdin@4264 | 51 | |
coleenp@4037 | 52 | // Parameters for stress mode testing |
coleenp@4037 | 53 | const uint metadata_deallocate_a_lot_block = 10; |
coleenp@4037 | 54 | const uint metadata_deallocate_a_lock_chunk = 3; |
mgerdin@5699 | 55 | size_t const allocation_from_dictionary_limit = 4 * K; |
coleenp@4037 | 56 | |
coleenp@4037 | 57 | MetaWord* last_allocated = 0; |
coleenp@4037 | 58 | |
hseigel@5528 | 59 | size_t Metaspace::_class_metaspace_size; |
hseigel@5528 | 60 | |
coleenp@4037 | 61 | // Used in declarations in SpaceManager and ChunkManager |
coleenp@4037 | 62 | enum ChunkIndex { |
jmasa@4382 | 63 | ZeroIndex = 0, |
jmasa@4382 | 64 | SpecializedIndex = ZeroIndex, |
jmasa@4382 | 65 | SmallIndex = SpecializedIndex + 1, |
jmasa@4382 | 66 | MediumIndex = SmallIndex + 1, |
jmasa@4382 | 67 | HumongousIndex = MediumIndex + 1, |
jmasa@4382 | 68 | NumberOfFreeLists = 3, |
jmasa@4382 | 69 | NumberOfInUseLists = 4 |
jmasa@4382 | 70 | }; |
jmasa@4382 | 71 | |
jmasa@4382 | 72 | enum ChunkSizes { // in words. |
jmasa@4382 | 73 | ClassSpecializedChunk = 128, |
jmasa@4382 | 74 | SpecializedChunk = 128, |
jmasa@4382 | 75 | ClassSmallChunk = 256, |
jmasa@4382 | 76 | SmallChunk = 512, |
coleenp@5337 | 77 | ClassMediumChunk = 4 * K, |
jmasa@4382 | 78 | MediumChunk = 8 * K, |
jmasa@4382 | 79 | HumongousChunkGranularity = 8 |
coleenp@4037 | 80 | }; |
coleenp@4037 | 81 | |
coleenp@4037 | 82 | static ChunkIndex next_chunk_index(ChunkIndex i) { |
jmasa@4196 | 83 | assert(i < NumberOfInUseLists, "Out of bound"); |
coleenp@4037 | 84 | return (ChunkIndex) (i+1); |
coleenp@4037 | 85 | } |
coleenp@4037 | 86 | |
coleenp@4037 | 87 | // Originally _capacity_until_GC was set to MetaspaceSize here but |
coleenp@4037 | 88 | // the default MetaspaceSize before argument processing was being |
coleenp@4037 | 89 | // used which was not the desired value. See the code |
coleenp@4037 | 90 | // in should_expand() to see how the initialization is handled |
coleenp@4037 | 91 | // now. |
coleenp@4037 | 92 | size_t MetaspaceGC::_capacity_until_GC = 0; |
coleenp@4037 | 93 | bool MetaspaceGC::_expand_after_GC = false; |
coleenp@4037 | 94 | uint MetaspaceGC::_shrink_factor = 0; |
coleenp@4037 | 95 | bool MetaspaceGC::_should_concurrent_collect = false; |
coleenp@4037 | 96 | |
coleenp@4037 | 97 | // Blocks of space for metadata are allocated out of Metachunks. |
coleenp@4037 | 98 | // |
coleenp@4037 | 99 | // Metachunk are allocated out of MetadataVirtualspaces and once |
coleenp@4037 | 100 | // allocated there is no explicit link between a Metachunk and |
coleenp@4037 | 101 | // the MetadataVirtualspaces from which it was allocated. |
coleenp@4037 | 102 | // |
coleenp@4037 | 103 | // Each SpaceManager maintains a |
coleenp@4037 | 104 | // list of the chunks it is using and the current chunk. The current |
coleenp@4037 | 105 | // chunk is the chunk from which allocations are done. Space freed in |
coleenp@4037 | 106 | // a chunk is placed on the free list of blocks (BlockFreelist) and |
coleenp@4037 | 107 | // reused from there. |
coleenp@4037 | 108 | |
jmasa@4932 | 109 | typedef class FreeList<Metachunk> ChunkList; |
coleenp@4037 | 110 | |
coleenp@4037 | 111 | // Manages the global free lists of chunks. |
coleenp@4037 | 112 | // Has three lists of free chunks, and a total size and |
coleenp@4037 | 113 | // count that includes all three |
coleenp@4037 | 114 | |
stefank@5771 | 115 | class ChunkManager : public CHeapObj<mtInternal> { |
coleenp@4037 | 116 | |
coleenp@4037 | 117 | // Free list of chunks of different sizes. |
jmasa@5007 | 118 | // SpecializedChunk |
coleenp@4037 | 119 | // SmallChunk |
coleenp@4037 | 120 | // MediumChunk |
coleenp@4037 | 121 | // HumongousChunk |
jmasa@4196 | 122 | ChunkList _free_chunks[NumberOfFreeLists]; |
jmasa@4196 | 123 | |
jmasa@4382 | 124 | |
jmasa@4196 | 125 | // HumongousChunk |
jmasa@4196 | 126 | ChunkTreeDictionary _humongous_dictionary; |
coleenp@4037 | 127 | |
coleenp@4037 | 128 | // ChunkManager in all lists of this type |
coleenp@4037 | 129 | size_t _free_chunks_total; |
coleenp@4037 | 130 | size_t _free_chunks_count; |
coleenp@4037 | 131 | |
coleenp@4037 | 132 | void dec_free_chunks_total(size_t v) { |
coleenp@4037 | 133 | assert(_free_chunks_count > 0 && |
coleenp@4037 | 134 | _free_chunks_total > 0, |
coleenp@4037 | 135 | "About to go negative"); |
coleenp@4037 | 136 | Atomic::add_ptr(-1, &_free_chunks_count); |
coleenp@4037 | 137 | jlong minus_v = (jlong) - (jlong) v; |
coleenp@4037 | 138 | Atomic::add_ptr(minus_v, &_free_chunks_total); |
coleenp@4037 | 139 | } |
coleenp@4037 | 140 | |
coleenp@4037 | 141 | // Debug support |
coleenp@4037 | 142 | |
coleenp@4037 | 143 | size_t sum_free_chunks(); |
coleenp@4037 | 144 | size_t sum_free_chunks_count(); |
coleenp@4037 | 145 | |
coleenp@4037 | 146 | void locked_verify_free_chunks_total(); |
mgerdin@4264 | 147 | void slow_locked_verify_free_chunks_total() { |
mgerdin@4264 | 148 | if (metaspace_slow_verify) { |
mgerdin@4264 | 149 | locked_verify_free_chunks_total(); |
mgerdin@4264 | 150 | } |
mgerdin@4264 | 151 | } |
coleenp@4037 | 152 | void locked_verify_free_chunks_count(); |
mgerdin@4264 | 153 | void slow_locked_verify_free_chunks_count() { |
mgerdin@4264 | 154 | if (metaspace_slow_verify) { |
mgerdin@4264 | 155 | locked_verify_free_chunks_count(); |
mgerdin@4264 | 156 | } |
mgerdin@4264 | 157 | } |
coleenp@4037 | 158 | void verify_free_chunks_count(); |
coleenp@4037 | 159 | |
coleenp@4037 | 160 | public: |
coleenp@4037 | 161 | |
stefank@5771 | 162 | ChunkManager(size_t specialized_size, size_t small_size, size_t medium_size) |
stefank@5771 | 163 | : _free_chunks_total(0), _free_chunks_count(0) { |
stefank@5771 | 164 | _free_chunks[SpecializedIndex].set_size(specialized_size); |
stefank@5771 | 165 | _free_chunks[SmallIndex].set_size(small_size); |
stefank@5771 | 166 | _free_chunks[MediumIndex].set_size(medium_size); |
stefank@5771 | 167 | } |
coleenp@4037 | 168 | |
coleenp@4037 | 169 | // add or delete (return) a chunk to the global freelist. |
coleenp@4037 | 170 | Metachunk* chunk_freelist_allocate(size_t word_size); |
coleenp@4037 | 171 | void chunk_freelist_deallocate(Metachunk* chunk); |
coleenp@4037 | 172 | |
jmasa@4382 | 173 | // Map a size to a list index assuming that there are lists |
jmasa@4382 | 174 | // for special, small, medium, and humongous chunks. |
jmasa@4382 | 175 | static ChunkIndex list_index(size_t size); |
jmasa@4382 | 176 | |
jmasa@5007 | 177 | // Remove the chunk from its freelist. It is |
jmasa@5007 | 178 | // expected to be on one of the _free_chunks[] lists. |
jmasa@5007 | 179 | void remove_chunk(Metachunk* chunk); |
jmasa@5007 | 180 | |
jmasa@4932 | 181 | // Add the simple linked list of chunks to the freelist of chunks |
jmasa@4932 | 182 | // of type index. |
jmasa@4932 | 183 | void return_chunks(ChunkIndex index, Metachunk* chunks); |
jmasa@4932 | 184 | |
coleenp@4037 | 185 | // Total of the space in the free chunks list |
ehelin@5703 | 186 | size_t free_chunks_total_words(); |
ehelin@5703 | 187 | size_t free_chunks_total_bytes(); |
coleenp@4037 | 188 | |
coleenp@4037 | 189 | // Number of chunks in the free chunks list |
coleenp@4037 | 190 | size_t free_chunks_count(); |
coleenp@4037 | 191 | |
coleenp@4037 | 192 | void inc_free_chunks_total(size_t v, size_t count = 1) { |
coleenp@4037 | 193 | Atomic::add_ptr(count, &_free_chunks_count); |
coleenp@4037 | 194 | Atomic::add_ptr(v, &_free_chunks_total); |
coleenp@4037 | 195 | } |
jmasa@4196 | 196 | ChunkTreeDictionary* humongous_dictionary() { |
jmasa@4196 | 197 | return &_humongous_dictionary; |
jmasa@4196 | 198 | } |
coleenp@4037 | 199 | |
coleenp@4037 | 200 | ChunkList* free_chunks(ChunkIndex index); |
coleenp@4037 | 201 | |
coleenp@4037 | 202 | // Returns the list for the given chunk word size. |
coleenp@4037 | 203 | ChunkList* find_free_chunks_list(size_t word_size); |
coleenp@4037 | 204 | |
coleenp@4037 | 205 | // Add and remove from a list by size. Selects |
coleenp@4037 | 206 | // list based on size of chunk. |
coleenp@4037 | 207 | void free_chunks_put(Metachunk* chuck); |
coleenp@4037 | 208 | Metachunk* free_chunks_get(size_t chunk_word_size); |
coleenp@4037 | 209 | |
coleenp@4037 | 210 | // Debug support |
coleenp@4037 | 211 | void verify(); |
mgerdin@4264 | 212 | void slow_verify() { |
mgerdin@4264 | 213 | if (metaspace_slow_verify) { |
mgerdin@4264 | 214 | verify(); |
mgerdin@4264 | 215 | } |
mgerdin@4264 | 216 | } |
coleenp@4037 | 217 | void locked_verify(); |
mgerdin@4264 | 218 | void slow_locked_verify() { |
mgerdin@4264 | 219 | if (metaspace_slow_verify) { |
mgerdin@4264 | 220 | locked_verify(); |
mgerdin@4264 | 221 | } |
mgerdin@4264 | 222 | } |
coleenp@4037 | 223 | void verify_free_chunks_total(); |
coleenp@4037 | 224 | |
coleenp@4037 | 225 | void locked_print_free_chunks(outputStream* st); |
coleenp@4037 | 226 | void locked_print_sum_free_chunks(outputStream* st); |
jmasa@4196 | 227 | |
stefank@5771 | 228 | void print_on(outputStream* st) const; |
coleenp@4037 | 229 | }; |
coleenp@4037 | 230 | |
coleenp@4037 | 231 | // Used to manage the free list of Metablocks (a block corresponds |
coleenp@4037 | 232 | // to the allocation of a quantum of metadata). |
coleenp@4037 | 233 | class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
jmasa@4196 | 234 | BlockTreeDictionary* _dictionary; |
jmasa@4196 | 235 | static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); |
jmasa@4196 | 236 | |
mgerdin@5699 | 237 | // Only allocate and split from freelist if the size of the allocation |
mgerdin@5699 | 238 | // is at least 1/4th the size of the available block. |
mgerdin@5699 | 239 | const static int WasteMultiplier = 4; |
mgerdin@5699 | 240 | |
coleenp@4037 | 241 | // Accessors |
jmasa@4196 | 242 | BlockTreeDictionary* dictionary() const { return _dictionary; } |
coleenp@4037 | 243 | |
coleenp@4037 | 244 | public: |
coleenp@4037 | 245 | BlockFreelist(); |
coleenp@4037 | 246 | ~BlockFreelist(); |
coleenp@4037 | 247 | |
coleenp@4037 | 248 | // Get and return a block to the free list |
jmasa@4196 | 249 | MetaWord* get_block(size_t word_size); |
jmasa@4196 | 250 | void return_block(MetaWord* p, size_t word_size); |
jmasa@4196 | 251 | |
jmasa@4196 | 252 | size_t total_size() { |
jmasa@4196 | 253 | if (dictionary() == NULL) { |
coleenp@4037 | 254 | return 0; |
jmasa@4196 | 255 | } else { |
jmasa@4196 | 256 | return dictionary()->total_size(); |
coleenp@4037 | 257 | } |
jmasa@4196 | 258 | } |
coleenp@4037 | 259 | |
coleenp@4037 | 260 | void print_on(outputStream* st) const; |
coleenp@4037 | 261 | }; |
coleenp@4037 | 262 | |
coleenp@4037 | 263 | class VirtualSpaceNode : public CHeapObj<mtClass> { |
coleenp@4037 | 264 | friend class VirtualSpaceList; |
coleenp@4037 | 265 | |
coleenp@4037 | 266 | // Link to next VirtualSpaceNode |
coleenp@4037 | 267 | VirtualSpaceNode* _next; |
coleenp@4037 | 268 | |
coleenp@4037 | 269 | // total in the VirtualSpace |
coleenp@4037 | 270 | MemRegion _reserved; |
coleenp@4037 | 271 | ReservedSpace _rs; |
coleenp@4037 | 272 | VirtualSpace _virtual_space; |
coleenp@4037 | 273 | MetaWord* _top; |
jmasa@5007 | 274 | // count of chunks contained in this VirtualSpace |
jmasa@5007 | 275 | uintx _container_count; |
coleenp@4037 | 276 | |
coleenp@4037 | 277 | // Convenience functions to access the _virtual_space |
coleenp@4037 | 278 | char* low() const { return virtual_space()->low(); } |
coleenp@4037 | 279 | char* high() const { return virtual_space()->high(); } |
coleenp@4037 | 280 | |
jmasa@5007 | 281 | // The first Metachunk will be allocated at the bottom of the |
jmasa@5007 | 282 | // VirtualSpace |
jmasa@5007 | 283 | Metachunk* first_chunk() { return (Metachunk*) bottom(); } |
jmasa@5007 | 284 | |
coleenp@4037 | 285 | public: |
coleenp@4037 | 286 | |
coleenp@4037 | 287 | VirtualSpaceNode(size_t byte_size); |
jmasa@5007 | 288 | VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
coleenp@4037 | 289 | ~VirtualSpaceNode(); |
coleenp@4037 | 290 | |
hseigel@5528 | 291 | // Convenience functions for logical bottom and end |
hseigel@5528 | 292 | MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
hseigel@5528 | 293 | MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
hseigel@5528 | 294 | |
stefank@5704 | 295 | size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
stefank@5704 | 296 | size_t expanded_words() const { return _virtual_space.committed_size() / BytesPerWord; } |
stefank@5704 | 297 | size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
stefank@5704 | 298 | |
coleenp@4037 | 299 | // address of next available space in _virtual_space; |
coleenp@4037 | 300 | // Accessors |
coleenp@4037 | 301 | VirtualSpaceNode* next() { return _next; } |
coleenp@4037 | 302 | void set_next(VirtualSpaceNode* v) { _next = v; } |
coleenp@4037 | 303 | |
coleenp@4037 | 304 | void set_reserved(MemRegion const v) { _reserved = v; } |
coleenp@4037 | 305 | void set_top(MetaWord* v) { _top = v; } |
coleenp@4037 | 306 | |
coleenp@4037 | 307 | // Accessors |
coleenp@4037 | 308 | MemRegion* reserved() { return &_reserved; } |
coleenp@4037 | 309 | VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
coleenp@4037 | 310 | |
jmasa@5015 | 311 | // Returns true if "word_size" is available in the VirtualSpace |
coleenp@4037 | 312 | bool is_available(size_t word_size) { return _top + word_size <= end(); } |
coleenp@4037 | 313 | |
coleenp@4037 | 314 | MetaWord* top() const { return _top; } |
coleenp@4037 | 315 | void inc_top(size_t word_size) { _top += word_size; } |
coleenp@4037 | 316 | |
jmasa@5007 | 317 | uintx container_count() { return _container_count; } |
stefank@5771 | 318 | void inc_container_count(); |
jmasa@5007 | 319 | void dec_container_count(); |
jmasa@5007 | 320 | #ifdef ASSERT |
stefank@5771 | 321 | uint container_count_slow(); |
jmasa@5007 | 322 | void verify_container_count(); |
jmasa@5007 | 323 | #endif |
jmasa@5007 | 324 | |
coleenp@4037 | 325 | // used and capacity in this single entry in the list |
coleenp@4037 | 326 | size_t used_words_in_vs() const; |
coleenp@4037 | 327 | size_t capacity_words_in_vs() const; |
jmasa@5015 | 328 | size_t free_words_in_vs() const; |
coleenp@4037 | 329 | |
coleenp@4037 | 330 | bool initialize(); |
coleenp@4037 | 331 | |
coleenp@4037 | 332 | // get space from the virtual space |
coleenp@4037 | 333 | Metachunk* take_from_committed(size_t chunk_word_size); |
coleenp@4037 | 334 | |
coleenp@4037 | 335 | // Allocate a chunk from the virtual space and return it. |
coleenp@4037 | 336 | Metachunk* get_chunk_vs(size_t chunk_word_size); |
coleenp@4037 | 337 | |
coleenp@4037 | 338 | // Expands/shrinks the committed space in a virtual space. Delegates |
coleenp@4037 | 339 | // to Virtualspace |
coleenp@4037 | 340 | bool expand_by(size_t words, bool pre_touch = false); |
coleenp@4037 | 341 | |
jmasa@5007 | 342 | // In preparation for deleting this node, remove all the chunks |
jmasa@5007 | 343 | // in the node from any freelist. |
jmasa@5007 | 344 | void purge(ChunkManager* chunk_manager); |
jmasa@5007 | 345 | |
coleenp@4304 | 346 | #ifdef ASSERT |
coleenp@4037 | 347 | // Debug support |
coleenp@4037 | 348 | void mangle(); |
coleenp@4304 | 349 | #endif |
coleenp@4037 | 350 | |
coleenp@4037 | 351 | void print_on(outputStream* st) const; |
coleenp@4037 | 352 | }; |
coleenp@4037 | 353 | |
coleenp@4037 | 354 | // byte_size is the size of the associated virtualspace. |
stefank@5578 | 355 | VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
zgu@4752 | 356 | // align up to vm allocation granularity |
zgu@4752 | 357 | byte_size = align_size_up(byte_size, os::vm_allocation_granularity()); |
zgu@4752 | 358 | |
coleenp@4804 | 359 | // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
coleenp@4804 | 360 | // configurable address, generally at the top of the Java heap so other |
coleenp@4804 | 361 | // memory addresses don't conflict. |
coleenp@4037 | 362 | if (DumpSharedSpaces) { |
coleenp@4804 | 363 | char* shared_base = (char*)SharedBaseAddress; |
coleenp@4037 | 364 | _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
coleenp@4037 | 365 | if (_rs.is_reserved()) { |
coleenp@4804 | 366 | assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
coleenp@4037 | 367 | } else { |
coleenp@4804 | 368 | // Get a mmap region anywhere if the SharedBaseAddress fails. |
coleenp@4037 | 369 | _rs = ReservedSpace(byte_size); |
coleenp@4037 | 370 | } |
coleenp@4037 | 371 | MetaspaceShared::set_shared_rs(&_rs); |
coleenp@4037 | 372 | } else { |
coleenp@4037 | 373 | _rs = ReservedSpace(byte_size); |
coleenp@4037 | 374 | } |
coleenp@4037 | 375 | |
coleenp@4037 | 376 | MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
coleenp@4037 | 377 | } |
coleenp@4037 | 378 | |
jmasa@5007 | 379 | void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
jmasa@5007 | 380 | Metachunk* chunk = first_chunk(); |
jmasa@5007 | 381 | Metachunk* invalid_chunk = (Metachunk*) top(); |
jmasa@5007 | 382 | while (chunk < invalid_chunk ) { |
jmasa@5007 | 383 | assert(chunk->is_free(), "Should be marked free"); |
jmasa@5007 | 384 | MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); |
jmasa@5007 | 385 | chunk_manager->remove_chunk(chunk); |
jmasa@5007 | 386 | assert(chunk->next() == NULL && |
jmasa@5007 | 387 | chunk->prev() == NULL, |
jmasa@5007 | 388 | "Was not removed from its list"); |
jmasa@5007 | 389 | chunk = (Metachunk*) next; |
jmasa@5007 | 390 | } |
jmasa@5007 | 391 | } |
jmasa@5007 | 392 | |
jmasa@5007 | 393 | #ifdef ASSERT |
jmasa@5007 | 394 | uint VirtualSpaceNode::container_count_slow() { |
jmasa@5007 | 395 | uint count = 0; |
jmasa@5007 | 396 | Metachunk* chunk = first_chunk(); |
jmasa@5007 | 397 | Metachunk* invalid_chunk = (Metachunk*) top(); |
jmasa@5007 | 398 | while (chunk < invalid_chunk ) { |
jmasa@5007 | 399 | MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); |
jmasa@5007 | 400 | // Don't count the chunks on the free lists. Those are |
jmasa@5007 | 401 | // still part of the VirtualSpaceNode but not currently |
jmasa@5007 | 402 | // counted. |
jmasa@5007 | 403 | if (!chunk->is_free()) { |
jmasa@5007 | 404 | count++; |
jmasa@5007 | 405 | } |
jmasa@5007 | 406 | chunk = (Metachunk*) next; |
jmasa@5007 | 407 | } |
jmasa@5007 | 408 | return count; |
jmasa@5007 | 409 | } |
jmasa@5007 | 410 | #endif |
jmasa@5007 | 411 | |
coleenp@4037 | 412 | // List of VirtualSpaces for metadata allocation. |
coleenp@4037 | 413 | // It has a _next link for singly linked list and a MemRegion |
coleenp@4037 | 414 | // for total space in the VirtualSpace. |
coleenp@4037 | 415 | class VirtualSpaceList : public CHeapObj<mtClass> { |
coleenp@4037 | 416 | friend class VirtualSpaceNode; |
coleenp@4037 | 417 | |
coleenp@4037 | 418 | enum VirtualSpaceSizes { |
coleenp@4037 | 419 | VirtualSpaceSize = 256 * K |
coleenp@4037 | 420 | }; |
coleenp@4037 | 421 | |
coleenp@4037 | 422 | // Global list of virtual spaces |
coleenp@4037 | 423 | // Head of the list |
coleenp@4037 | 424 | VirtualSpaceNode* _virtual_space_list; |
coleenp@4037 | 425 | // virtual space currently being used for allocations |
coleenp@4037 | 426 | VirtualSpaceNode* _current_virtual_space; |
coleenp@4037 | 427 | |
coleenp@4037 | 428 | // Can this virtual list allocate >1 spaces? Also, used to determine |
coleenp@4037 | 429 | // whether to allocate unlimited small chunks in this virtual space |
coleenp@4037 | 430 | bool _is_class; |
ehelin@5694 | 431 | bool can_grow() const { return !is_class() || !UseCompressedClassPointers; } |
coleenp@4037 | 432 | |
stefank@5704 | 433 | // Sum of reserved and committed memory in the virtual spaces |
stefank@5704 | 434 | size_t _reserved_words; |
stefank@5704 | 435 | size_t _committed_words; |
stefank@5704 | 436 | |
stefank@5704 | 437 | // Number of virtual spaces |
coleenp@4037 | 438 | size_t _virtual_space_count; |
coleenp@4037 | 439 | |
coleenp@4037 | 440 | ~VirtualSpaceList(); |
coleenp@4037 | 441 | |
coleenp@4037 | 442 | VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
coleenp@4037 | 443 | |
coleenp@4037 | 444 | void set_virtual_space_list(VirtualSpaceNode* v) { |
coleenp@4037 | 445 | _virtual_space_list = v; |
coleenp@4037 | 446 | } |
coleenp@4037 | 447 | void set_current_virtual_space(VirtualSpaceNode* v) { |
coleenp@4037 | 448 | _current_virtual_space = v; |
coleenp@4037 | 449 | } |
coleenp@4037 | 450 | |
stefank@5704 | 451 | void link_vs(VirtualSpaceNode* new_entry); |
coleenp@4037 | 452 | |
coleenp@4037 | 453 | // Get another virtual space and add it to the list. This |
coleenp@4037 | 454 | // is typically prompted by a failed attempt to allocate a chunk |
coleenp@4037 | 455 | // and is typically followed by the allocation of a chunk. |
coleenp@4037 | 456 | bool grow_vs(size_t vs_word_size); |
coleenp@4037 | 457 | |
coleenp@4037 | 458 | public: |
coleenp@4037 | 459 | VirtualSpaceList(size_t word_size); |
coleenp@4037 | 460 | VirtualSpaceList(ReservedSpace rs); |
coleenp@4037 | 461 | |
jmasa@5015 | 462 | size_t free_bytes(); |
jmasa@5015 | 463 | |
jmasa@4382 | 464 | Metachunk* get_new_chunk(size_t word_size, |
jmasa@4382 | 465 | size_t grow_chunks_by_words, |
jmasa@4382 | 466 | size_t medium_chunk_bunch); |
jmasa@4382 | 467 | |
stefank@5704 | 468 | bool expand_by(VirtualSpaceNode* node, size_t word_size, bool pre_touch = false); |
stefank@5704 | 469 | |
jmasa@4382 | 470 | // Get the first chunk for a Metaspace. Used for |
jmasa@4382 | 471 | // special cases such as the boot class loader, reflection |
jmasa@4382 | 472 | // class loader and anonymous class loader. |
jmasa@4382 | 473 | Metachunk* get_initialization_chunk(size_t word_size, size_t chunk_bunch); |
coleenp@4037 | 474 | |
coleenp@4037 | 475 | VirtualSpaceNode* current_virtual_space() { |
coleenp@4037 | 476 | return _current_virtual_space; |
coleenp@4037 | 477 | } |
coleenp@4037 | 478 | |
coleenp@4037 | 479 | bool is_class() const { return _is_class; } |
coleenp@4037 | 480 | |
coleenp@4037 | 481 | // Allocate the first virtualspace. |
coleenp@4037 | 482 | void initialize(size_t word_size); |
coleenp@4037 | 483 | |
stefank@5704 | 484 | size_t reserved_words() { return _reserved_words; } |
stefank@5704 | 485 | size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
stefank@5704 | 486 | size_t committed_words() { return _committed_words; } |
stefank@5704 | 487 | size_t committed_bytes() { return committed_words() * BytesPerWord; } |
stefank@5704 | 488 | |
stefank@5704 | 489 | void inc_reserved_words(size_t v); |
stefank@5704 | 490 | void dec_reserved_words(size_t v); |
stefank@5704 | 491 | void inc_committed_words(size_t v); |
stefank@5704 | 492 | void dec_committed_words(size_t v); |
jmasa@5007 | 493 | void inc_virtual_space_count(); |
jmasa@5007 | 494 | void dec_virtual_space_count(); |
jmasa@5007 | 495 | |
jmasa@5007 | 496 | // Unlink empty VirtualSpaceNodes and free it. |
stefank@5771 | 497 | void purge(ChunkManager* chunk_manager); |
coleenp@4037 | 498 | |
coleenp@4037 | 499 | bool contains(const void *ptr); |
coleenp@4037 | 500 | |
coleenp@4037 | 501 | void print_on(outputStream* st) const; |
coleenp@4037 | 502 | |
coleenp@4037 | 503 | class VirtualSpaceListIterator : public StackObj { |
coleenp@4037 | 504 | VirtualSpaceNode* _virtual_spaces; |
coleenp@4037 | 505 | public: |
coleenp@4037 | 506 | VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
coleenp@4037 | 507 | _virtual_spaces(virtual_spaces) {} |
coleenp@4037 | 508 | |
coleenp@4037 | 509 | bool repeat() { |
coleenp@4037 | 510 | return _virtual_spaces != NULL; |
coleenp@4037 | 511 | } |
coleenp@4037 | 512 | |
coleenp@4037 | 513 | VirtualSpaceNode* get_next() { |
coleenp@4037 | 514 | VirtualSpaceNode* result = _virtual_spaces; |
coleenp@4037 | 515 | if (_virtual_spaces != NULL) { |
coleenp@4037 | 516 | _virtual_spaces = _virtual_spaces->next(); |
coleenp@4037 | 517 | } |
coleenp@4037 | 518 | return result; |
coleenp@4037 | 519 | } |
coleenp@4037 | 520 | }; |
coleenp@4037 | 521 | }; |
coleenp@4037 | 522 | |
coleenp@4037 | 523 | class Metadebug : AllStatic { |
coleenp@4037 | 524 | // Debugging support for Metaspaces |
coleenp@4037 | 525 | static int _deallocate_block_a_lot_count; |
coleenp@4037 | 526 | static int _deallocate_chunk_a_lot_count; |
coleenp@4037 | 527 | static int _allocation_fail_alot_count; |
coleenp@4037 | 528 | |
coleenp@4037 | 529 | public: |
coleenp@4037 | 530 | static int deallocate_block_a_lot_count() { |
coleenp@4037 | 531 | return _deallocate_block_a_lot_count; |
coleenp@4037 | 532 | } |
coleenp@4037 | 533 | static void set_deallocate_block_a_lot_count(int v) { |
coleenp@4037 | 534 | _deallocate_block_a_lot_count = v; |
coleenp@4037 | 535 | } |
coleenp@4037 | 536 | static void inc_deallocate_block_a_lot_count() { |
coleenp@4037 | 537 | _deallocate_block_a_lot_count++; |
coleenp@4037 | 538 | } |
coleenp@4037 | 539 | static int deallocate_chunk_a_lot_count() { |
coleenp@4037 | 540 | return _deallocate_chunk_a_lot_count; |
coleenp@4037 | 541 | } |
coleenp@4037 | 542 | static void reset_deallocate_chunk_a_lot_count() { |
coleenp@4037 | 543 | _deallocate_chunk_a_lot_count = 1; |
coleenp@4037 | 544 | } |
coleenp@4037 | 545 | static void inc_deallocate_chunk_a_lot_count() { |
coleenp@4037 | 546 | _deallocate_chunk_a_lot_count++; |
coleenp@4037 | 547 | } |
coleenp@4037 | 548 | |
coleenp@4037 | 549 | static void init_allocation_fail_alot_count(); |
coleenp@4037 | 550 | #ifdef ASSERT |
coleenp@4037 | 551 | static bool test_metadata_failure(); |
coleenp@4037 | 552 | #endif |
coleenp@4037 | 553 | |
coleenp@4037 | 554 | static void deallocate_chunk_a_lot(SpaceManager* sm, |
coleenp@4037 | 555 | size_t chunk_word_size); |
coleenp@4037 | 556 | static void deallocate_block_a_lot(SpaceManager* sm, |
coleenp@4037 | 557 | size_t chunk_word_size); |
coleenp@4037 | 558 | |
coleenp@4037 | 559 | }; |
coleenp@4037 | 560 | |
coleenp@4037 | 561 | int Metadebug::_deallocate_block_a_lot_count = 0; |
coleenp@4037 | 562 | int Metadebug::_deallocate_chunk_a_lot_count = 0; |
coleenp@4037 | 563 | int Metadebug::_allocation_fail_alot_count = 0; |
coleenp@4037 | 564 | |
coleenp@4037 | 565 | // SpaceManager - used by Metaspace to handle allocations |
coleenp@4037 | 566 | class SpaceManager : public CHeapObj<mtClass> { |
coleenp@4037 | 567 | friend class Metaspace; |
coleenp@4037 | 568 | friend class Metadebug; |
coleenp@4037 | 569 | |
coleenp@4037 | 570 | private: |
jmasa@4382 | 571 | |
coleenp@4037 | 572 | // protects allocations and contains. |
coleenp@4037 | 573 | Mutex* const _lock; |
coleenp@4037 | 574 | |
jmasa@5162 | 575 | // Type of metadata allocated. |
jmasa@5162 | 576 | Metaspace::MetadataType _mdtype; |
jmasa@5162 | 577 | |
coleenp@4037 | 578 | // List of chunks in use by this SpaceManager. Allocations |
coleenp@4037 | 579 | // are done from the current chunk. The list is used for deallocating |
coleenp@4037 | 580 | // chunks when the SpaceManager is freed. |
jmasa@4196 | 581 | Metachunk* _chunks_in_use[NumberOfInUseLists]; |
coleenp@4037 | 582 | Metachunk* _current_chunk; |
coleenp@4037 | 583 | |
coleenp@4037 | 584 | // Number of small chunks to allocate to a manager |
coleenp@4037 | 585 | // If class space manager, small chunks are unlimited |
coleenp@4037 | 586 | static uint const _small_chunk_limit; |
coleenp@4037 | 587 | |
coleenp@4037 | 588 | // Sum of all space in allocated chunks |
jmasa@5015 | 589 | size_t _allocated_blocks_words; |
jmasa@5015 | 590 | |
jmasa@5015 | 591 | // Sum of all allocated chunks |
jmasa@5015 | 592 | size_t _allocated_chunks_words; |
jmasa@5015 | 593 | size_t _allocated_chunks_count; |
coleenp@4037 | 594 | |
coleenp@4037 | 595 | // Free lists of blocks are per SpaceManager since they |
coleenp@4037 | 596 | // are assumed to be in chunks in use by the SpaceManager |
coleenp@4037 | 597 | // and all chunks in use by a SpaceManager are freed when |
coleenp@4037 | 598 | // the class loader using the SpaceManager is collected. |
coleenp@4037 | 599 | BlockFreelist _block_freelists; |
coleenp@4037 | 600 | |
coleenp@4037 | 601 | // protects virtualspace and chunk expansions |
coleenp@4037 | 602 | static const char* _expand_lock_name; |
coleenp@4037 | 603 | static const int _expand_lock_rank; |
coleenp@4037 | 604 | static Mutex* const _expand_lock; |
coleenp@4037 | 605 | |
jmasa@4382 | 606 | private: |
coleenp@4037 | 607 | // Accessors |
coleenp@4037 | 608 | Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
coleenp@4037 | 609 | void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
coleenp@4037 | 610 | |
coleenp@4037 | 611 | BlockFreelist* block_freelists() const { |
coleenp@4037 | 612 | return (BlockFreelist*) &_block_freelists; |
coleenp@4037 | 613 | } |
coleenp@4037 | 614 | |
jmasa@5162 | 615 | Metaspace::MetadataType mdtype() { return _mdtype; } |
stefank@5771 | 616 | |
stefank@5771 | 617 | VirtualSpaceList* vs_list() const { return Metaspace::get_space_list(_mdtype); } |
stefank@5771 | 618 | ChunkManager* chunk_manager() const { return Metaspace::get_chunk_manager(_mdtype); } |
coleenp@4037 | 619 | |
coleenp@4037 | 620 | Metachunk* current_chunk() const { return _current_chunk; } |
coleenp@4037 | 621 | void set_current_chunk(Metachunk* v) { |
coleenp@4037 | 622 | _current_chunk = v; |
coleenp@4037 | 623 | } |
coleenp@4037 | 624 | |
coleenp@4037 | 625 | Metachunk* find_current_chunk(size_t word_size); |
coleenp@4037 | 626 | |
coleenp@4037 | 627 | // Add chunk to the list of chunks in use |
coleenp@4037 | 628 | void add_chunk(Metachunk* v, bool make_current); |
mgerdin@5699 | 629 | void retire_current_chunk(); |
coleenp@4037 | 630 | |
coleenp@4037 | 631 | Mutex* lock() const { return _lock; } |
coleenp@4037 | 632 | |
jmasa@4382 | 633 | const char* chunk_size_name(ChunkIndex index) const; |
jmasa@4382 | 634 | |
jmasa@4382 | 635 | protected: |
jmasa@4382 | 636 | void initialize(); |
jmasa@4382 | 637 | |
coleenp@4037 | 638 | public: |
jmasa@5162 | 639 | SpaceManager(Metaspace::MetadataType mdtype, |
stefank@5771 | 640 | Mutex* lock); |
coleenp@4037 | 641 | ~SpaceManager(); |
coleenp@4037 | 642 | |
jmasa@4382 | 643 | enum ChunkMultiples { |
jmasa@4382 | 644 | MediumChunkMultiple = 4 |
coleenp@4037 | 645 | }; |
coleenp@4037 | 646 | |
stefank@5771 | 647 | bool is_class() { return _mdtype == Metaspace::ClassType; } |
stefank@5771 | 648 | |
coleenp@4037 | 649 | // Accessors |
jmasa@4382 | 650 | size_t specialized_chunk_size() { return SpecializedChunk; } |
stefank@5771 | 651 | size_t small_chunk_size() { return (size_t) is_class() ? ClassSmallChunk : SmallChunk; } |
stefank@5771 | 652 | size_t medium_chunk_size() { return (size_t) is_class() ? ClassMediumChunk : MediumChunk; } |
jmasa@4382 | 653 | size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
jmasa@4382 | 654 | |
jmasa@5015 | 655 | size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
jmasa@5015 | 656 | size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
jmasa@5015 | 657 | size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
jmasa@5015 | 658 | size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
jmasa@5015 | 659 | |
jmasa@4382 | 660 | bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
coleenp@4037 | 661 | |
coleenp@4037 | 662 | static Mutex* expand_lock() { return _expand_lock; } |
coleenp@4037 | 663 | |
jmasa@5015 | 664 | // Increment the per Metaspace and global running sums for Metachunks |
jmasa@5015 | 665 | // by the given size. This is used when a Metachunk to added to |
jmasa@5015 | 666 | // the in-use list. |
jmasa@5015 | 667 | void inc_size_metrics(size_t words); |
jmasa@5015 | 668 | // Increment the per Metaspace and global running sums Metablocks by the given |
jmasa@5015 | 669 | // size. This is used when a Metablock is allocated. |
jmasa@5015 | 670 | void inc_used_metrics(size_t words); |
jmasa@5015 | 671 | // Delete the portion of the running sums for this SpaceManager. That is, |
jmasa@5015 | 672 | // the globals running sums for the Metachunks and Metablocks are |
jmasa@5015 | 673 | // decremented for all the Metachunks in-use by this SpaceManager. |
jmasa@5015 | 674 | void dec_total_from_size_metrics(); |
jmasa@5015 | 675 | |
jmasa@4382 | 676 | // Set the sizes for the initial chunks. |
jmasa@4382 | 677 | void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
jmasa@4382 | 678 | size_t* chunk_word_size, |
jmasa@4382 | 679 | size_t* class_chunk_word_size); |
jmasa@4382 | 680 | |
coleenp@4037 | 681 | size_t sum_capacity_in_chunks_in_use() const; |
coleenp@4037 | 682 | size_t sum_used_in_chunks_in_use() const; |
coleenp@4037 | 683 | size_t sum_free_in_chunks_in_use() const; |
coleenp@4037 | 684 | size_t sum_waste_in_chunks_in_use() const; |
coleenp@4037 | 685 | size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
coleenp@4037 | 686 | |
coleenp@4037 | 687 | size_t sum_count_in_chunks_in_use(); |
coleenp@4037 | 688 | size_t sum_count_in_chunks_in_use(ChunkIndex i); |
coleenp@4037 | 689 | |
jmasa@4382 | 690 | Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
jmasa@4382 | 691 | |
coleenp@4037 | 692 | // Block allocation and deallocation. |
coleenp@4037 | 693 | // Allocates a block from the current chunk |
coleenp@4037 | 694 | MetaWord* allocate(size_t word_size); |
coleenp@4037 | 695 | |
coleenp@4037 | 696 | // Helper for allocations |
jmasa@4196 | 697 | MetaWord* allocate_work(size_t word_size); |
coleenp@4037 | 698 | |
coleenp@4037 | 699 | // Returns a block to the per manager freelist |
jmasa@4196 | 700 | void deallocate(MetaWord* p, size_t word_size); |
coleenp@4037 | 701 | |
coleenp@4037 | 702 | // Based on the allocation size and a minimum chunk size, |
coleenp@4037 | 703 | // returned chunk size (for expanding space for chunk allocation). |
coleenp@4037 | 704 | size_t calc_chunk_size(size_t allocation_word_size); |
coleenp@4037 | 705 | |
coleenp@4037 | 706 | // Called when an allocation from the current chunk fails. |
coleenp@4037 | 707 | // Gets a new chunk (may require getting a new virtual space), |
coleenp@4037 | 708 | // and allocates from that chunk. |
jmasa@4196 | 709 | MetaWord* grow_and_allocate(size_t word_size); |
coleenp@4037 | 710 | |
coleenp@4037 | 711 | // debugging support. |
coleenp@4037 | 712 | |
coleenp@4037 | 713 | void dump(outputStream* const out) const; |
coleenp@4037 | 714 | void print_on(outputStream* st) const; |
coleenp@4037 | 715 | void locked_print_chunks_in_use_on(outputStream* st) const; |
coleenp@4037 | 716 | |
coleenp@4037 | 717 | void verify(); |
jmasa@4327 | 718 | void verify_chunk_size(Metachunk* chunk); |
coleenp@4304 | 719 | NOT_PRODUCT(void mangle_freed_chunks();) |
coleenp@4037 | 720 | #ifdef ASSERT |
jmasa@5015 | 721 | void verify_allocated_blocks_words(); |
coleenp@4037 | 722 | #endif |
iklam@5208 | 723 | |
iklam@5208 | 724 | size_t get_raw_word_size(size_t word_size) { |
iklam@5208 | 725 | // If only the dictionary is going to be used (i.e., no |
iklam@5208 | 726 | // indexed free list), then there is a minimum size requirement. |
iklam@5208 | 727 | // MinChunkSize is a placeholder for the real minimum size JJJ |
iklam@5208 | 728 | size_t byte_size = word_size * BytesPerWord; |
iklam@5208 | 729 | |
stefank@5705 | 730 | size_t raw_bytes_size = MAX2(byte_size, |
iklam@5208 | 731 | Metablock::min_block_byte_size()); |
iklam@5208 | 732 | raw_bytes_size = ARENA_ALIGN(raw_bytes_size); |
iklam@5208 | 733 | size_t raw_word_size = raw_bytes_size / BytesPerWord; |
iklam@5208 | 734 | assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
iklam@5208 | 735 | |
iklam@5208 | 736 | return raw_word_size; |
iklam@5208 | 737 | } |
coleenp@4037 | 738 | }; |
coleenp@4037 | 739 | |
coleenp@4037 | 740 | uint const SpaceManager::_small_chunk_limit = 4; |
coleenp@4037 | 741 | |
coleenp@4037 | 742 | const char* SpaceManager::_expand_lock_name = |
coleenp@4037 | 743 | "SpaceManager chunk allocation lock"; |
coleenp@4037 | 744 | const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
coleenp@4037 | 745 | Mutex* const SpaceManager::_expand_lock = |
coleenp@4037 | 746 | new Mutex(SpaceManager::_expand_lock_rank, |
coleenp@4037 | 747 | SpaceManager::_expand_lock_name, |
coleenp@4037 | 748 | Mutex::_allow_vm_block_flag); |
coleenp@4037 | 749 | |
jmasa@5007 | 750 | void VirtualSpaceNode::inc_container_count() { |
jmasa@5007 | 751 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 752 | _container_count++; |
jmasa@5007 | 753 | assert(_container_count == container_count_slow(), |
jmasa@5007 | 754 | err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT |
stefank@5771 | 755 | " container_count_slow() " SIZE_FORMAT, |
jmasa@5007 | 756 | _container_count, container_count_slow())); |
jmasa@5007 | 757 | } |
jmasa@5007 | 758 | |
jmasa@5007 | 759 | void VirtualSpaceNode::dec_container_count() { |
jmasa@5007 | 760 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 761 | _container_count--; |
jmasa@5007 | 762 | } |
jmasa@5007 | 763 | |
jmasa@5007 | 764 | #ifdef ASSERT |
jmasa@5007 | 765 | void VirtualSpaceNode::verify_container_count() { |
jmasa@5007 | 766 | assert(_container_count == container_count_slow(), |
jmasa@5007 | 767 | err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT |
stefank@5771 | 768 | " container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); |
jmasa@5007 | 769 | } |
jmasa@5007 | 770 | #endif |
jmasa@5007 | 771 | |
coleenp@4037 | 772 | // BlockFreelist methods |
coleenp@4037 | 773 | |
coleenp@4037 | 774 | BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
coleenp@4037 | 775 | |
coleenp@4037 | 776 | BlockFreelist::~BlockFreelist() { |
coleenp@4037 | 777 | if (_dictionary != NULL) { |
coleenp@4037 | 778 | if (Verbose && TraceMetadataChunkAllocation) { |
coleenp@4037 | 779 | _dictionary->print_free_lists(gclog_or_tty); |
coleenp@4037 | 780 | } |
coleenp@4037 | 781 | delete _dictionary; |
coleenp@4037 | 782 | } |
coleenp@4037 | 783 | } |
coleenp@4037 | 784 | |
jmasa@4196 | 785 | Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
jmasa@4196 | 786 | Metablock* block = (Metablock*) p; |
jmasa@4196 | 787 | block->set_word_size(word_size); |
jmasa@4196 | 788 | block->set_prev(NULL); |
jmasa@4196 | 789 | block->set_next(NULL); |
jmasa@4196 | 790 | |
coleenp@4037 | 791 | return block; |
coleenp@4037 | 792 | } |
coleenp@4037 | 793 | |
jmasa@4196 | 794 | void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
jmasa@4196 | 795 | Metablock* free_chunk = initialize_free_chunk(p, word_size); |
coleenp@4037 | 796 | if (dictionary() == NULL) { |
jmasa@4196 | 797 | _dictionary = new BlockTreeDictionary(); |
coleenp@4037 | 798 | } |
jmasa@4196 | 799 | dictionary()->return_chunk(free_chunk); |
coleenp@4037 | 800 | } |
coleenp@4037 | 801 | |
jmasa@4196 | 802 | MetaWord* BlockFreelist::get_block(size_t word_size) { |
coleenp@4037 | 803 | if (dictionary() == NULL) { |
coleenp@4037 | 804 | return NULL; |
coleenp@4037 | 805 | } |
coleenp@4037 | 806 | |
jmasa@4196 | 807 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 808 | // Dark matter. Too small for dictionary. |
coleenp@4037 | 809 | return NULL; |
coleenp@4037 | 810 | } |
jmasa@4196 | 811 | |
jmasa@4196 | 812 | Metablock* free_block = |
mgerdin@5699 | 813 | dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
jmasa@4196 | 814 | if (free_block == NULL) { |
jmasa@4196 | 815 | return NULL; |
jmasa@4196 | 816 | } |
jmasa@4196 | 817 | |
mgerdin@5699 | 818 | const size_t block_size = free_block->size(); |
mgerdin@5699 | 819 | if (block_size > WasteMultiplier * word_size) { |
mgerdin@5699 | 820 | return_block((MetaWord*)free_block, block_size); |
mgerdin@5699 | 821 | return NULL; |
mgerdin@5699 | 822 | } |
mgerdin@5699 | 823 | |
mgerdin@5699 | 824 | MetaWord* new_block = (MetaWord*)free_block; |
mgerdin@5699 | 825 | assert(block_size >= word_size, "Incorrect size of block from freelist"); |
mgerdin@5699 | 826 | const size_t unused = block_size - word_size; |
mgerdin@5699 | 827 | if (unused >= TreeChunk<Metablock, FreeList>::min_size()) { |
mgerdin@5699 | 828 | return_block(new_block + word_size, unused); |
mgerdin@5699 | 829 | } |
mgerdin@5699 | 830 | |
mgerdin@5699 | 831 | return new_block; |
coleenp@4037 | 832 | } |
coleenp@4037 | 833 | |
coleenp@4037 | 834 | void BlockFreelist::print_on(outputStream* st) const { |
coleenp@4037 | 835 | if (dictionary() == NULL) { |
coleenp@4037 | 836 | return; |
coleenp@4037 | 837 | } |
coleenp@4037 | 838 | dictionary()->print_free_lists(st); |
coleenp@4037 | 839 | } |
coleenp@4037 | 840 | |
coleenp@4037 | 841 | // VirtualSpaceNode methods |
coleenp@4037 | 842 | |
coleenp@4037 | 843 | VirtualSpaceNode::~VirtualSpaceNode() { |
coleenp@4037 | 844 | _rs.release(); |
jmasa@5007 | 845 | #ifdef ASSERT |
jmasa@5007 | 846 | size_t word_size = sizeof(*this) / BytesPerWord; |
jmasa@5007 | 847 | Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); |
jmasa@5007 | 848 | #endif |
coleenp@4037 | 849 | } |
coleenp@4037 | 850 | |
coleenp@4037 | 851 | size_t VirtualSpaceNode::used_words_in_vs() const { |
coleenp@4037 | 852 | return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 853 | } |
coleenp@4037 | 854 | |
coleenp@4037 | 855 | // Space committed in the VirtualSpace |
coleenp@4037 | 856 | size_t VirtualSpaceNode::capacity_words_in_vs() const { |
coleenp@4037 | 857 | return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 858 | } |
coleenp@4037 | 859 | |
jmasa@5015 | 860 | size_t VirtualSpaceNode::free_words_in_vs() const { |
jmasa@5015 | 861 | return pointer_delta(end(), top(), sizeof(MetaWord)); |
jmasa@5015 | 862 | } |
coleenp@4037 | 863 | |
coleenp@4037 | 864 | // Allocates the chunk from the virtual space only. |
coleenp@4037 | 865 | // This interface is also used internally for debugging. Not all |
coleenp@4037 | 866 | // chunks removed here are necessarily used for allocation. |
coleenp@4037 | 867 | Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
coleenp@4037 | 868 | // Bottom of the new chunk |
coleenp@4037 | 869 | MetaWord* chunk_limit = top(); |
coleenp@4037 | 870 | assert(chunk_limit != NULL, "Not safe to call this method"); |
coleenp@4037 | 871 | |
coleenp@4037 | 872 | if (!is_available(chunk_word_size)) { |
coleenp@4037 | 873 | if (TraceMetadataChunkAllocation) { |
stefank@5708 | 874 | gclog_or_tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
coleenp@4037 | 875 | // Dump some information about the virtual space that is nearly full |
stefank@5708 | 876 | print_on(gclog_or_tty); |
coleenp@4037 | 877 | } |
coleenp@4037 | 878 | return NULL; |
coleenp@4037 | 879 | } |
coleenp@4037 | 880 | |
coleenp@4037 | 881 | // Take the space (bump top on the current virtual space). |
coleenp@4037 | 882 | inc_top(chunk_word_size); |
coleenp@4037 | 883 | |
jmasa@5007 | 884 | // Initialize the chunk |
jmasa@5007 | 885 | Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); |
coleenp@4037 | 886 | return result; |
coleenp@4037 | 887 | } |
coleenp@4037 | 888 | |
coleenp@4037 | 889 | |
coleenp@4037 | 890 | // Expand the virtual space (commit more of the reserved space) |
coleenp@4037 | 891 | bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
coleenp@4037 | 892 | size_t bytes = words * BytesPerWord; |
coleenp@4037 | 893 | bool result = virtual_space()->expand_by(bytes, pre_touch); |
coleenp@4037 | 894 | if (TraceMetavirtualspaceAllocation && !result) { |
coleenp@4037 | 895 | gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
coleenp@4037 | 896 | "for byte size " SIZE_FORMAT, bytes); |
stefank@5708 | 897 | virtual_space()->print_on(gclog_or_tty); |
coleenp@4037 | 898 | } |
coleenp@4037 | 899 | return result; |
coleenp@4037 | 900 | } |
coleenp@4037 | 901 | |
coleenp@4037 | 902 | Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
coleenp@4037 | 903 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 904 | Metachunk* result = take_from_committed(chunk_word_size); |
jmasa@5007 | 905 | if (result != NULL) { |
jmasa@5007 | 906 | inc_container_count(); |
jmasa@5007 | 907 | } |
jmasa@5007 | 908 | return result; |
coleenp@4037 | 909 | } |
coleenp@4037 | 910 | |
coleenp@4037 | 911 | bool VirtualSpaceNode::initialize() { |
coleenp@4037 | 912 | |
coleenp@4037 | 913 | if (!_rs.is_reserved()) { |
coleenp@4037 | 914 | return false; |
coleenp@4037 | 915 | } |
coleenp@4037 | 916 | |
jmasa@4382 | 917 | // An allocation out of this Virtualspace that is larger |
jmasa@4382 | 918 | // than an initial commit size can waste that initial committed |
jmasa@4382 | 919 | // space. |
jmasa@4382 | 920 | size_t committed_byte_size = 0; |
coleenp@4037 | 921 | bool result = virtual_space()->initialize(_rs, committed_byte_size); |
coleenp@4037 | 922 | if (result) { |
coleenp@4037 | 923 | set_top((MetaWord*)virtual_space()->low()); |
coleenp@4037 | 924 | set_reserved(MemRegion((HeapWord*)_rs.base(), |
coleenp@4037 | 925 | (HeapWord*)(_rs.base() + _rs.size()))); |
coleenp@4038 | 926 | |
coleenp@4038 | 927 | assert(reserved()->start() == (HeapWord*) _rs.base(), |
coleenp@4038 | 928 | err_msg("Reserved start was not set properly " PTR_FORMAT |
coleenp@4038 | 929 | " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
coleenp@4038 | 930 | assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
coleenp@4038 | 931 | err_msg("Reserved size was not set properly " SIZE_FORMAT |
coleenp@4038 | 932 | " != " SIZE_FORMAT, reserved()->word_size(), |
coleenp@4038 | 933 | _rs.size() / BytesPerWord)); |
coleenp@4037 | 934 | } |
coleenp@4037 | 935 | |
coleenp@4037 | 936 | return result; |
coleenp@4037 | 937 | } |
coleenp@4037 | 938 | |
coleenp@4037 | 939 | void VirtualSpaceNode::print_on(outputStream* st) const { |
coleenp@4037 | 940 | size_t used = used_words_in_vs(); |
coleenp@4037 | 941 | size_t capacity = capacity_words_in_vs(); |
coleenp@4037 | 942 | VirtualSpace* vs = virtual_space(); |
coleenp@4037 | 943 | st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
coleenp@4037 | 944 | "[" PTR_FORMAT ", " PTR_FORMAT ", " |
coleenp@4037 | 945 | PTR_FORMAT ", " PTR_FORMAT ")", |
jmasa@4382 | 946 | vs, capacity / K, |
jmasa@4382 | 947 | capacity == 0 ? 0 : used * 100 / capacity, |
coleenp@4037 | 948 | bottom(), top(), end(), |
coleenp@4037 | 949 | vs->high_boundary()); |
coleenp@4037 | 950 | } |
coleenp@4037 | 951 | |
coleenp@4304 | 952 | #ifdef ASSERT |
coleenp@4037 | 953 | void VirtualSpaceNode::mangle() { |
coleenp@4037 | 954 | size_t word_size = capacity_words_in_vs(); |
coleenp@4037 | 955 | Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
coleenp@4037 | 956 | } |
coleenp@4304 | 957 | #endif // ASSERT |
coleenp@4037 | 958 | |
coleenp@4037 | 959 | // VirtualSpaceList methods |
coleenp@4037 | 960 | // Space allocated from the VirtualSpace |
coleenp@4037 | 961 | |
coleenp@4037 | 962 | VirtualSpaceList::~VirtualSpaceList() { |
coleenp@4037 | 963 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 964 | while (iter.repeat()) { |
coleenp@4037 | 965 | VirtualSpaceNode* vsl = iter.get_next(); |
coleenp@4037 | 966 | delete vsl; |
coleenp@4037 | 967 | } |
coleenp@4037 | 968 | } |
coleenp@4037 | 969 | |
stefank@5704 | 970 | void VirtualSpaceList::inc_reserved_words(size_t v) { |
jmasa@5007 | 971 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 972 | _reserved_words = _reserved_words + v; |
jmasa@5007 | 973 | } |
stefank@5704 | 974 | void VirtualSpaceList::dec_reserved_words(size_t v) { |
jmasa@5007 | 975 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 976 | _reserved_words = _reserved_words - v; |
stefank@5704 | 977 | } |
stefank@5704 | 978 | |
stefank@5704 | 979 | void VirtualSpaceList::inc_committed_words(size_t v) { |
stefank@5704 | 980 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 981 | _committed_words = _committed_words + v; |
stefank@5704 | 982 | } |
stefank@5704 | 983 | void VirtualSpaceList::dec_committed_words(size_t v) { |
stefank@5704 | 984 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 985 | _committed_words = _committed_words - v; |
jmasa@5007 | 986 | } |
jmasa@5007 | 987 | |
jmasa@5007 | 988 | void VirtualSpaceList::inc_virtual_space_count() { |
jmasa@5007 | 989 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 990 | _virtual_space_count++; |
jmasa@5007 | 991 | } |
jmasa@5007 | 992 | void VirtualSpaceList::dec_virtual_space_count() { |
jmasa@5007 | 993 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 994 | _virtual_space_count--; |
jmasa@5007 | 995 | } |
jmasa@5007 | 996 | |
jmasa@5007 | 997 | void ChunkManager::remove_chunk(Metachunk* chunk) { |
jmasa@5007 | 998 | size_t word_size = chunk->word_size(); |
jmasa@5007 | 999 | ChunkIndex index = list_index(word_size); |
jmasa@5007 | 1000 | if (index != HumongousIndex) { |
jmasa@5007 | 1001 | free_chunks(index)->remove_chunk(chunk); |
jmasa@5007 | 1002 | } else { |
jmasa@5007 | 1003 | humongous_dictionary()->remove_chunk(chunk); |
jmasa@5007 | 1004 | } |
jmasa@5007 | 1005 | |
jmasa@5007 | 1006 | // Chunk is being removed from the chunks free list. |
jmasa@5007 | 1007 | dec_free_chunks_total(chunk->capacity_word_size()); |
jmasa@5007 | 1008 | } |
jmasa@5007 | 1009 | |
jmasa@5007 | 1010 | // Walk the list of VirtualSpaceNodes and delete |
jmasa@5007 | 1011 | // nodes with a 0 container_count. Remove Metachunks in |
jmasa@5007 | 1012 | // the node from their respective freelists. |
stefank@5771 | 1013 | void VirtualSpaceList::purge(ChunkManager* chunk_manager) { |
jmasa@5007 | 1014 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 1015 | // Don't use a VirtualSpaceListIterator because this |
jmasa@5007 | 1016 | // list is being changed and a straightforward use of an iterator is not safe. |
jmasa@5007 | 1017 | VirtualSpaceNode* purged_vsl = NULL; |
jmasa@5007 | 1018 | VirtualSpaceNode* prev_vsl = virtual_space_list(); |
jmasa@5007 | 1019 | VirtualSpaceNode* next_vsl = prev_vsl; |
jmasa@5007 | 1020 | while (next_vsl != NULL) { |
jmasa@5007 | 1021 | VirtualSpaceNode* vsl = next_vsl; |
jmasa@5007 | 1022 | next_vsl = vsl->next(); |
jmasa@5007 | 1023 | // Don't free the current virtual space since it will likely |
jmasa@5007 | 1024 | // be needed soon. |
jmasa@5007 | 1025 | if (vsl->container_count() == 0 && vsl != current_virtual_space()) { |
jmasa@5007 | 1026 | // Unlink it from the list |
jmasa@5007 | 1027 | if (prev_vsl == vsl) { |
jmasa@5007 | 1028 | // This is the case of the current note being the first note. |
jmasa@5007 | 1029 | assert(vsl == virtual_space_list(), "Expected to be the first note"); |
jmasa@5007 | 1030 | set_virtual_space_list(vsl->next()); |
jmasa@5007 | 1031 | } else { |
jmasa@5007 | 1032 | prev_vsl->set_next(vsl->next()); |
jmasa@5007 | 1033 | } |
jmasa@5007 | 1034 | |
stefank@5771 | 1035 | vsl->purge(chunk_manager); |
stefank@5704 | 1036 | dec_reserved_words(vsl->reserved_words()); |
stefank@5704 | 1037 | dec_committed_words(vsl->committed_words()); |
jmasa@5007 | 1038 | dec_virtual_space_count(); |
jmasa@5007 | 1039 | purged_vsl = vsl; |
jmasa@5007 | 1040 | delete vsl; |
jmasa@5007 | 1041 | } else { |
jmasa@5007 | 1042 | prev_vsl = vsl; |
jmasa@5007 | 1043 | } |
jmasa@5007 | 1044 | } |
jmasa@5007 | 1045 | #ifdef ASSERT |
jmasa@5007 | 1046 | if (purged_vsl != NULL) { |
jmasa@5007 | 1047 | // List should be stable enough to use an iterator here. |
jmasa@5007 | 1048 | VirtualSpaceListIterator iter(virtual_space_list()); |
jmasa@5007 | 1049 | while (iter.repeat()) { |
jmasa@5007 | 1050 | VirtualSpaceNode* vsl = iter.get_next(); |
jmasa@5007 | 1051 | assert(vsl != purged_vsl, "Purge of vsl failed"); |
jmasa@5007 | 1052 | } |
jmasa@5007 | 1053 | } |
jmasa@5007 | 1054 | #endif |
jmasa@5007 | 1055 | } |
jmasa@5007 | 1056 | |
coleenp@4037 | 1057 | VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
coleenp@4037 | 1058 | _is_class(false), |
coleenp@4037 | 1059 | _virtual_space_list(NULL), |
coleenp@4037 | 1060 | _current_virtual_space(NULL), |
stefank@5704 | 1061 | _reserved_words(0), |
stefank@5704 | 1062 | _committed_words(0), |
coleenp@4037 | 1063 | _virtual_space_count(0) { |
coleenp@4037 | 1064 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1065 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1066 | bool initialization_succeeded = grow_vs(word_size); |
coleenp@4037 | 1067 | assert(initialization_succeeded, |
coleenp@4037 | 1068 | " VirtualSpaceList initialization should not fail"); |
coleenp@4037 | 1069 | } |
coleenp@4037 | 1070 | |
coleenp@4037 | 1071 | VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
coleenp@4037 | 1072 | _is_class(true), |
coleenp@4037 | 1073 | _virtual_space_list(NULL), |
coleenp@4037 | 1074 | _current_virtual_space(NULL), |
stefank@5704 | 1075 | _reserved_words(0), |
stefank@5704 | 1076 | _committed_words(0), |
coleenp@4037 | 1077 | _virtual_space_count(0) { |
coleenp@4037 | 1078 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1079 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1080 | VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
coleenp@4037 | 1081 | bool succeeded = class_entry->initialize(); |
coleenp@4037 | 1082 | assert(succeeded, " VirtualSpaceList initialization should not fail"); |
stefank@5704 | 1083 | link_vs(class_entry); |
coleenp@4037 | 1084 | } |
coleenp@4037 | 1085 | |
jmasa@5015 | 1086 | size_t VirtualSpaceList::free_bytes() { |
jmasa@5015 | 1087 | return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
jmasa@5015 | 1088 | } |
jmasa@5015 | 1089 | |
coleenp@4037 | 1090 | // Allocate another meta virtual space and add it to the list. |
coleenp@4037 | 1091 | bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
coleenp@4037 | 1092 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1093 | if (vs_word_size == 0) { |
coleenp@4037 | 1094 | return false; |
coleenp@4037 | 1095 | } |
coleenp@4037 | 1096 | // Reserve the space |
coleenp@4037 | 1097 | size_t vs_byte_size = vs_word_size * BytesPerWord; |
brutisso@5774 | 1098 | assert(vs_byte_size % os::vm_allocation_granularity() == 0, "Not aligned"); |
coleenp@4037 | 1099 | |
coleenp@4037 | 1100 | // Allocate the meta virtual space and initialize it. |
coleenp@4037 | 1101 | VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
coleenp@4037 | 1102 | if (!new_entry->initialize()) { |
coleenp@4037 | 1103 | delete new_entry; |
coleenp@4037 | 1104 | return false; |
coleenp@4037 | 1105 | } else { |
stefank@5704 | 1106 | assert(new_entry->reserved_words() == vs_word_size, "Must be"); |
coleenp@4295 | 1107 | // ensure lock-free iteration sees fully initialized node |
coleenp@4295 | 1108 | OrderAccess::storestore(); |
stefank@5704 | 1109 | link_vs(new_entry); |
coleenp@4037 | 1110 | return true; |
coleenp@4037 | 1111 | } |
coleenp@4037 | 1112 | } |
coleenp@4037 | 1113 | |
stefank@5704 | 1114 | void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
coleenp@4037 | 1115 | if (virtual_space_list() == NULL) { |
coleenp@4037 | 1116 | set_virtual_space_list(new_entry); |
coleenp@4037 | 1117 | } else { |
coleenp@4037 | 1118 | current_virtual_space()->set_next(new_entry); |
coleenp@4037 | 1119 | } |
coleenp@4037 | 1120 | set_current_virtual_space(new_entry); |
stefank@5704 | 1121 | inc_reserved_words(new_entry->reserved_words()); |
stefank@5704 | 1122 | inc_committed_words(new_entry->committed_words()); |
coleenp@4037 | 1123 | inc_virtual_space_count(); |
coleenp@4037 | 1124 | #ifdef ASSERT |
coleenp@4037 | 1125 | new_entry->mangle(); |
coleenp@4037 | 1126 | #endif |
coleenp@4037 | 1127 | if (TraceMetavirtualspaceAllocation && Verbose) { |
coleenp@4037 | 1128 | VirtualSpaceNode* vsl = current_virtual_space(); |
stefank@5708 | 1129 | vsl->print_on(gclog_or_tty); |
coleenp@4037 | 1130 | } |
coleenp@4037 | 1131 | } |
coleenp@4037 | 1132 | |
stefank@5704 | 1133 | bool VirtualSpaceList::expand_by(VirtualSpaceNode* node, size_t word_size, bool pre_touch) { |
stefank@5704 | 1134 | size_t before = node->committed_words(); |
stefank@5704 | 1135 | |
stefank@5704 | 1136 | bool result = node->expand_by(word_size, pre_touch); |
stefank@5704 | 1137 | |
stefank@5704 | 1138 | size_t after = node->committed_words(); |
stefank@5704 | 1139 | |
stefank@5704 | 1140 | // after and before can be the same if the memory was pre-committed. |
stefank@5704 | 1141 | assert(after >= before, "Must be"); |
stefank@5704 | 1142 | inc_committed_words(after - before); |
stefank@5704 | 1143 | |
stefank@5704 | 1144 | return result; |
stefank@5704 | 1145 | } |
stefank@5704 | 1146 | |
coleenp@4037 | 1147 | Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
jmasa@4382 | 1148 | size_t grow_chunks_by_words, |
jmasa@4382 | 1149 | size_t medium_chunk_bunch) { |
coleenp@4037 | 1150 | |
stefank@5771 | 1151 | // Allocate a chunk out of the current virtual space. |
stefank@5771 | 1152 | Metachunk* next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 1153 | |
coleenp@4037 | 1154 | if (next == NULL) { |
coleenp@4037 | 1155 | // Not enough room in current virtual space. Try to commit |
coleenp@4037 | 1156 | // more space. |
jmasa@4382 | 1157 | size_t expand_vs_by_words = MAX2(medium_chunk_bunch, |
jmasa@4382 | 1158 | grow_chunks_by_words); |
coleenp@4037 | 1159 | size_t page_size_words = os::vm_page_size() / BytesPerWord; |
coleenp@4037 | 1160 | size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
coleenp@4037 | 1161 | page_size_words); |
coleenp@4037 | 1162 | bool vs_expanded = |
stefank@5704 | 1163 | expand_by(current_virtual_space(), aligned_expand_vs_by_words); |
coleenp@4037 | 1164 | if (!vs_expanded) { |
coleenp@4037 | 1165 | // Should the capacity of the metaspaces be expanded for |
coleenp@4037 | 1166 | // this allocation? If it's the virtual space for classes and is |
coleenp@4037 | 1167 | // being used for CompressedHeaders, don't allocate a new virtualspace. |
coleenp@4037 | 1168 | if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
coleenp@4037 | 1169 | // Get another virtual space. |
brutisso@5774 | 1170 | size_t allocation_aligned_expand_words = |
brutisso@5774 | 1171 | align_size_up(aligned_expand_vs_by_words, os::vm_allocation_granularity() / BytesPerWord); |
brutisso@5774 | 1172 | size_t grow_vs_words = |
brutisso@5774 | 1173 | MAX2((size_t)VirtualSpaceSize, allocation_aligned_expand_words); |
coleenp@4037 | 1174 | if (grow_vs(grow_vs_words)) { |
coleenp@4037 | 1175 | // Got it. It's on the list now. Get a chunk from it. |
stefank@5704 | 1176 | assert(current_virtual_space()->expanded_words() == 0, |
brutisso@5774 | 1177 | "New virtual space nodes should not have expanded"); |
stefank@5704 | 1178 | |
stefank@5704 | 1179 | size_t grow_chunks_by_words_aligned = align_size_up(grow_chunks_by_words, |
stefank@5704 | 1180 | page_size_words); |
stefank@5704 | 1181 | // We probably want to expand by aligned_expand_vs_by_words here. |
stefank@5704 | 1182 | expand_by(current_virtual_space(), grow_chunks_by_words_aligned); |
stefank@5704 | 1183 | next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 1184 | } |
coleenp@4037 | 1185 | } else { |
coleenp@4037 | 1186 | // Allocation will fail and induce a GC |
coleenp@4037 | 1187 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1188 | gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
coleenp@4037 | 1189 | " Fail instead of expand the metaspace"); |
coleenp@4037 | 1190 | } |
coleenp@4037 | 1191 | } |
coleenp@4037 | 1192 | } else { |
coleenp@4037 | 1193 | // The virtual space expanded, get a new chunk |
coleenp@4037 | 1194 | next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 1195 | assert(next != NULL, "Just expanded, should succeed"); |
coleenp@4037 | 1196 | } |
coleenp@4037 | 1197 | } |
coleenp@4037 | 1198 | |
jmasa@4382 | 1199 | assert(next == NULL || (next->next() == NULL && next->prev() == NULL), |
jmasa@4382 | 1200 | "New chunk is still on some list"); |
coleenp@4037 | 1201 | return next; |
coleenp@4037 | 1202 | } |
coleenp@4037 | 1203 | |
jmasa@4382 | 1204 | Metachunk* VirtualSpaceList::get_initialization_chunk(size_t chunk_word_size, |
jmasa@4382 | 1205 | size_t chunk_bunch) { |
jmasa@4382 | 1206 | // Get a chunk from the chunk freelist |
jmasa@4382 | 1207 | Metachunk* new_chunk = get_new_chunk(chunk_word_size, |
jmasa@4382 | 1208 | chunk_word_size, |
jmasa@4382 | 1209 | chunk_bunch); |
jmasa@4382 | 1210 | return new_chunk; |
jmasa@4382 | 1211 | } |
jmasa@4382 | 1212 | |
coleenp@4037 | 1213 | void VirtualSpaceList::print_on(outputStream* st) const { |
coleenp@4037 | 1214 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1215 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 1216 | while (iter.repeat()) { |
coleenp@4037 | 1217 | VirtualSpaceNode* node = iter.get_next(); |
coleenp@4037 | 1218 | node->print_on(st); |
coleenp@4037 | 1219 | } |
coleenp@4037 | 1220 | } |
coleenp@4037 | 1221 | } |
coleenp@4037 | 1222 | |
coleenp@4037 | 1223 | bool VirtualSpaceList::contains(const void *ptr) { |
coleenp@4037 | 1224 | VirtualSpaceNode* list = virtual_space_list(); |
coleenp@4037 | 1225 | VirtualSpaceListIterator iter(list); |
coleenp@4037 | 1226 | while (iter.repeat()) { |
coleenp@4037 | 1227 | VirtualSpaceNode* node = iter.get_next(); |
coleenp@4037 | 1228 | if (node->reserved()->contains(ptr)) { |
coleenp@4037 | 1229 | return true; |
coleenp@4037 | 1230 | } |
coleenp@4037 | 1231 | } |
coleenp@4037 | 1232 | return false; |
coleenp@4037 | 1233 | } |
coleenp@4037 | 1234 | |
coleenp@4037 | 1235 | |
coleenp@4037 | 1236 | // MetaspaceGC methods |
coleenp@4037 | 1237 | |
coleenp@4037 | 1238 | // VM_CollectForMetadataAllocation is the vm operation used to GC. |
coleenp@4037 | 1239 | // Within the VM operation after the GC the attempt to allocate the metadata |
coleenp@4037 | 1240 | // should succeed. If the GC did not free enough space for the metaspace |
coleenp@4037 | 1241 | // allocation, the HWM is increased so that another virtualspace will be |
coleenp@4037 | 1242 | // allocated for the metadata. With perm gen the increase in the perm |
coleenp@4037 | 1243 | // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
coleenp@4037 | 1244 | // metaspace policy uses those as the small and large steps for the HWM. |
coleenp@4037 | 1245 | // |
coleenp@4037 | 1246 | // After the GC the compute_new_size() for MetaspaceGC is called to |
coleenp@4037 | 1247 | // resize the capacity of the metaspaces. The current implementation |
jmasa@5015 | 1248 | // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
coleenp@4037 | 1249 | // to resize the Java heap by some GC's. New flags can be implemented |
jmasa@5015 | 1250 | // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
coleenp@4037 | 1251 | // free space is desirable in the metaspace capacity to decide how much |
jmasa@4581 | 1252 | // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
coleenp@4037 | 1253 | // free space is desirable in the metaspace capacity before decreasing |
coleenp@4037 | 1254 | // the HWM. |
coleenp@4037 | 1255 | |
coleenp@4037 | 1256 | // Calculate the amount to increase the high water mark (HWM). |
coleenp@4037 | 1257 | // Increase by a minimum amount (MinMetaspaceExpansion) so that |
coleenp@4037 | 1258 | // another expansion is not requested too soon. If that is not |
coleenp@4037 | 1259 | // enough to satisfy the allocation (i.e. big enough for a word_size |
coleenp@4037 | 1260 | // allocation), increase by MaxMetaspaceExpansion. If that is still |
coleenp@4037 | 1261 | // not enough, expand by the size of the allocation (word_size) plus |
coleenp@4037 | 1262 | // some. |
coleenp@4037 | 1263 | size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
coleenp@4037 | 1264 | size_t before_inc = MetaspaceGC::capacity_until_GC(); |
coleenp@4037 | 1265 | size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
coleenp@4037 | 1266 | size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
coleenp@4037 | 1267 | size_t page_size_words = os::vm_page_size() / BytesPerWord; |
coleenp@4037 | 1268 | size_t size_delta_words = align_size_up(word_size, page_size_words); |
coleenp@4037 | 1269 | size_t delta_words = MAX2(size_delta_words, min_delta_words); |
coleenp@4037 | 1270 | if (delta_words > min_delta_words) { |
coleenp@4037 | 1271 | // Don't want to hit the high water mark on the next |
coleenp@4037 | 1272 | // allocation so make the delta greater than just enough |
coleenp@4037 | 1273 | // for this allocation. |
coleenp@4037 | 1274 | delta_words = MAX2(delta_words, max_delta_words); |
coleenp@4037 | 1275 | if (delta_words > max_delta_words) { |
coleenp@4037 | 1276 | // This allocation is large but the next ones are probably not |
coleenp@4037 | 1277 | // so increase by the minimum. |
coleenp@4037 | 1278 | delta_words = delta_words + min_delta_words; |
coleenp@4037 | 1279 | } |
coleenp@4037 | 1280 | } |
coleenp@4037 | 1281 | return delta_words; |
coleenp@4037 | 1282 | } |
coleenp@4037 | 1283 | |
coleenp@4037 | 1284 | bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
jmasa@5015 | 1285 | |
mgerdin@4790 | 1286 | // If the user wants a limit, impose one. |
coleenp@5337 | 1287 | // The reason for someone using this flag is to limit reserved space. So |
coleenp@5337 | 1288 | // for non-class virtual space, compare against virtual spaces that are reserved. |
coleenp@5337 | 1289 | // For class virtual space, we only compare against the committed space, not |
coleenp@5337 | 1290 | // reserved space, because this is a larger space prereserved for compressed |
coleenp@5337 | 1291 | // class pointers. |
coleenp@5337 | 1292 | if (!FLAG_IS_DEFAULT(MaxMetaspaceSize)) { |
stefank@5770 | 1293 | size_t nonclass_allocated = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
stefank@5770 | 1294 | size_t class_allocated = MetaspaceAux::allocated_capacity_bytes(Metaspace::ClassType); |
stefank@5770 | 1295 | size_t real_allocated = nonclass_allocated + class_allocated; |
coleenp@5337 | 1296 | if (real_allocated >= MaxMetaspaceSize) { |
coleenp@5337 | 1297 | return false; |
coleenp@5337 | 1298 | } |
mgerdin@4790 | 1299 | } |
coleenp@4037 | 1300 | |
coleenp@4037 | 1301 | // Class virtual space should always be expanded. Call GC for the other |
coleenp@4037 | 1302 | // metadata virtual space. |
hseigel@5528 | 1303 | if (Metaspace::using_class_space() && |
hseigel@5528 | 1304 | (vsl == Metaspace::class_space_list())) return true; |
coleenp@4037 | 1305 | |
coleenp@4037 | 1306 | // If this is part of an allocation after a GC, expand |
coleenp@4037 | 1307 | // unconditionally. |
jmasa@5015 | 1308 | if (MetaspaceGC::expand_after_GC()) { |
coleenp@4037 | 1309 | return true; |
coleenp@4037 | 1310 | } |
coleenp@4037 | 1311 | |
jmasa@5015 | 1312 | |
coleenp@4037 | 1313 | // If the capacity is below the minimum capacity, allow the |
coleenp@4037 | 1314 | // expansion. Also set the high-water-mark (capacity_until_GC) |
coleenp@4037 | 1315 | // to that minimum capacity so that a GC will not be induced |
coleenp@4037 | 1316 | // until that minimum capacity is exceeded. |
coleenp@5337 | 1317 | size_t committed_capacity_bytes = MetaspaceAux::allocated_capacity_bytes(); |
coleenp@5337 | 1318 | size_t metaspace_size_bytes = MetaspaceSize; |
jmasa@5015 | 1319 | if (committed_capacity_bytes < metaspace_size_bytes || |
coleenp@4037 | 1320 | capacity_until_GC() == 0) { |
jmasa@5015 | 1321 | set_capacity_until_GC(metaspace_size_bytes); |
coleenp@4037 | 1322 | return true; |
coleenp@4037 | 1323 | } else { |
jmasa@5015 | 1324 | if (committed_capacity_bytes < capacity_until_GC()) { |
coleenp@4037 | 1325 | return true; |
coleenp@4037 | 1326 | } else { |
coleenp@4037 | 1327 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1328 | gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
coleenp@4037 | 1329 | " capacity_until_GC " SIZE_FORMAT |
jmasa@5015 | 1330 | " allocated_capacity_bytes " SIZE_FORMAT, |
coleenp@4037 | 1331 | word_size, |
coleenp@4037 | 1332 | capacity_until_GC(), |
jmasa@5015 | 1333 | MetaspaceAux::allocated_capacity_bytes()); |
coleenp@4037 | 1334 | } |
coleenp@4037 | 1335 | return false; |
coleenp@4037 | 1336 | } |
coleenp@4037 | 1337 | } |
coleenp@4037 | 1338 | } |
coleenp@4037 | 1339 | |
jmasa@5015 | 1340 | |
coleenp@4037 | 1341 | |
coleenp@4037 | 1342 | void MetaspaceGC::compute_new_size() { |
coleenp@4037 | 1343 | assert(_shrink_factor <= 100, "invalid shrink factor"); |
coleenp@4037 | 1344 | uint current_shrink_factor = _shrink_factor; |
coleenp@4037 | 1345 | _shrink_factor = 0; |
coleenp@4037 | 1346 | |
jmasa@5015 | 1347 | // Until a faster way of calculating the "used" quantity is implemented, |
jmasa@5015 | 1348 | // use "capacity". |
jmasa@5015 | 1349 | const size_t used_after_gc = MetaspaceAux::allocated_capacity_bytes(); |
jmasa@5015 | 1350 | const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
coleenp@4037 | 1351 | |
jmasa@4581 | 1352 | const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
coleenp@4037 | 1353 | const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
coleenp@4037 | 1354 | |
coleenp@4037 | 1355 | const double min_tmp = used_after_gc / maximum_used_percentage; |
coleenp@4037 | 1356 | size_t minimum_desired_capacity = |
coleenp@4037 | 1357 | (size_t)MIN2(min_tmp, double(max_uintx)); |
coleenp@4037 | 1358 | // Don't shrink less than the initial generation size |
coleenp@4037 | 1359 | minimum_desired_capacity = MAX2(minimum_desired_capacity, |
coleenp@4037 | 1360 | MetaspaceSize); |
coleenp@4037 | 1361 | |
coleenp@4037 | 1362 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1363 | gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
coleenp@4037 | 1364 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1365 | " minimum_free_percentage: %6.2f" |
coleenp@4037 | 1366 | " maximum_used_percentage: %6.2f", |
coleenp@4037 | 1367 | minimum_free_percentage, |
coleenp@4037 | 1368 | maximum_used_percentage); |
coleenp@4037 | 1369 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1370 | " used_after_gc : %6.1fKB", |
jmasa@5015 | 1371 | used_after_gc / (double) K); |
coleenp@4037 | 1372 | } |
coleenp@4037 | 1373 | |
coleenp@4037 | 1374 | |
jmasa@5015 | 1375 | size_t shrink_bytes = 0; |
coleenp@4037 | 1376 | if (capacity_until_GC < minimum_desired_capacity) { |
coleenp@4037 | 1377 | // If we have less capacity below the metaspace HWM, then |
coleenp@4037 | 1378 | // increment the HWM. |
coleenp@4037 | 1379 | size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
coleenp@4037 | 1380 | // Don't expand unless it's significant |
coleenp@4037 | 1381 | if (expand_bytes >= MinMetaspaceExpansion) { |
jmasa@5015 | 1382 | MetaspaceGC::set_capacity_until_GC(capacity_until_GC + expand_bytes); |
coleenp@4037 | 1383 | } |
coleenp@4037 | 1384 | if (PrintGCDetails && Verbose) { |
jmasa@5015 | 1385 | size_t new_capacity_until_GC = capacity_until_GC; |
coleenp@4037 | 1386 | gclog_or_tty->print_cr(" expanding:" |
jmasa@5015 | 1387 | " minimum_desired_capacity: %6.1fKB" |
jmasa@5015 | 1388 | " expand_bytes: %6.1fKB" |
jmasa@5015 | 1389 | " MinMetaspaceExpansion: %6.1fKB" |
jmasa@5015 | 1390 | " new metaspace HWM: %6.1fKB", |
coleenp@4037 | 1391 | minimum_desired_capacity / (double) K, |
coleenp@4037 | 1392 | expand_bytes / (double) K, |
coleenp@4037 | 1393 | MinMetaspaceExpansion / (double) K, |
coleenp@4037 | 1394 | new_capacity_until_GC / (double) K); |
coleenp@4037 | 1395 | } |
coleenp@4037 | 1396 | return; |
coleenp@4037 | 1397 | } |
coleenp@4037 | 1398 | |
coleenp@4037 | 1399 | // No expansion, now see if we want to shrink |
coleenp@4037 | 1400 | // We would never want to shrink more than this |
jmasa@5015 | 1401 | size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
jmasa@5015 | 1402 | assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
jmasa@5015 | 1403 | max_shrink_bytes)); |
coleenp@4037 | 1404 | |
coleenp@4037 | 1405 | // Should shrinking be considered? |
jmasa@4581 | 1406 | if (MaxMetaspaceFreeRatio < 100) { |
jmasa@4581 | 1407 | const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
coleenp@4037 | 1408 | const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
coleenp@4037 | 1409 | const double max_tmp = used_after_gc / minimum_used_percentage; |
coleenp@4037 | 1410 | size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
coleenp@4037 | 1411 | maximum_desired_capacity = MAX2(maximum_desired_capacity, |
coleenp@4037 | 1412 | MetaspaceSize); |
jmasa@5015 | 1413 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1414 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1415 | " maximum_free_percentage: %6.2f" |
coleenp@4037 | 1416 | " minimum_used_percentage: %6.2f", |
coleenp@4037 | 1417 | maximum_free_percentage, |
coleenp@4037 | 1418 | minimum_used_percentage); |
coleenp@4037 | 1419 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1420 | " minimum_desired_capacity: %6.1fKB" |
jmasa@5015 | 1421 | " maximum_desired_capacity: %6.1fKB", |
coleenp@4037 | 1422 | minimum_desired_capacity / (double) K, |
coleenp@4037 | 1423 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1424 | } |
coleenp@4037 | 1425 | |
coleenp@4037 | 1426 | assert(minimum_desired_capacity <= maximum_desired_capacity, |
coleenp@4037 | 1427 | "sanity check"); |
coleenp@4037 | 1428 | |
coleenp@4037 | 1429 | if (capacity_until_GC > maximum_desired_capacity) { |
coleenp@4037 | 1430 | // Capacity too large, compute shrinking size |
jmasa@5015 | 1431 | shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
coleenp@4037 | 1432 | // We don't want shrink all the way back to initSize if people call |
coleenp@4037 | 1433 | // System.gc(), because some programs do that between "phases" and then |
coleenp@4037 | 1434 | // we'd just have to grow the heap up again for the next phase. So we |
coleenp@4037 | 1435 | // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
coleenp@4037 | 1436 | // on the third call, and 100% by the fourth call. But if we recompute |
coleenp@4037 | 1437 | // size without shrinking, it goes back to 0%. |
jmasa@5015 | 1438 | shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
jmasa@5015 | 1439 | assert(shrink_bytes <= max_shrink_bytes, |
coleenp@4037 | 1440 | err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
jmasa@5015 | 1441 | shrink_bytes, max_shrink_bytes)); |
coleenp@4037 | 1442 | if (current_shrink_factor == 0) { |
coleenp@4037 | 1443 | _shrink_factor = 10; |
coleenp@4037 | 1444 | } else { |
coleenp@4037 | 1445 | _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
coleenp@4037 | 1446 | } |
coleenp@4037 | 1447 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1448 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1449 | " shrinking:" |
coleenp@4037 | 1450 | " initSize: %.1fK" |
coleenp@4037 | 1451 | " maximum_desired_capacity: %.1fK", |
coleenp@4037 | 1452 | MetaspaceSize / (double) K, |
coleenp@4037 | 1453 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1454 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1455 | " shrink_bytes: %.1fK" |
coleenp@4037 | 1456 | " current_shrink_factor: %d" |
coleenp@4037 | 1457 | " new shrink factor: %d" |
coleenp@4037 | 1458 | " MinMetaspaceExpansion: %.1fK", |
jmasa@5015 | 1459 | shrink_bytes / (double) K, |
coleenp@4037 | 1460 | current_shrink_factor, |
coleenp@4037 | 1461 | _shrink_factor, |
coleenp@4037 | 1462 | MinMetaspaceExpansion / (double) K); |
coleenp@4037 | 1463 | } |
coleenp@4037 | 1464 | } |
coleenp@4037 | 1465 | } |
coleenp@4037 | 1466 | |
coleenp@4037 | 1467 | // Don't shrink unless it's significant |
jmasa@5015 | 1468 | if (shrink_bytes >= MinMetaspaceExpansion && |
jmasa@5015 | 1469 | ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
jmasa@5015 | 1470 | MetaspaceGC::set_capacity_until_GC(capacity_until_GC - shrink_bytes); |
coleenp@4037 | 1471 | } |
coleenp@4037 | 1472 | } |
coleenp@4037 | 1473 | |
coleenp@4037 | 1474 | // Metadebug methods |
coleenp@4037 | 1475 | |
coleenp@4037 | 1476 | void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
coleenp@4037 | 1477 | size_t chunk_word_size){ |
coleenp@4037 | 1478 | #ifdef ASSERT |
coleenp@4037 | 1479 | VirtualSpaceList* vsl = sm->vs_list(); |
coleenp@4037 | 1480 | if (MetaDataDeallocateALot && |
coleenp@4037 | 1481 | Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
coleenp@4037 | 1482 | Metadebug::reset_deallocate_chunk_a_lot_count(); |
coleenp@4037 | 1483 | for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
coleenp@4037 | 1484 | Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
coleenp@4037 | 1485 | if (dummy_chunk == NULL) { |
coleenp@4037 | 1486 | break; |
coleenp@4037 | 1487 | } |
stefank@5771 | 1488 | sm->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
coleenp@4037 | 1489 | |
coleenp@4037 | 1490 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1491 | gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
coleenp@4037 | 1492 | sm->sum_count_in_chunks_in_use()); |
coleenp@4037 | 1493 | dummy_chunk->print_on(gclog_or_tty); |
coleenp@4037 | 1494 | gclog_or_tty->print_cr(" Free chunks total %d count %d", |
stefank@5771 | 1495 | sm->chunk_manager()->free_chunks_total_words(), |
stefank@5771 | 1496 | sm->chunk_manager()->free_chunks_count()); |
coleenp@4037 | 1497 | } |
coleenp@4037 | 1498 | } |
coleenp@4037 | 1499 | } else { |
coleenp@4037 | 1500 | Metadebug::inc_deallocate_chunk_a_lot_count(); |
coleenp@4037 | 1501 | } |
coleenp@4037 | 1502 | #endif |
coleenp@4037 | 1503 | } |
coleenp@4037 | 1504 | |
coleenp@4037 | 1505 | void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
coleenp@4037 | 1506 | size_t raw_word_size){ |
coleenp@4037 | 1507 | #ifdef ASSERT |
coleenp@4037 | 1508 | if (MetaDataDeallocateALot && |
coleenp@4037 | 1509 | Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
coleenp@4037 | 1510 | Metadebug::set_deallocate_block_a_lot_count(0); |
coleenp@4037 | 1511 | for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
jmasa@4196 | 1512 | MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
coleenp@4037 | 1513 | if (dummy_block == 0) { |
coleenp@4037 | 1514 | break; |
coleenp@4037 | 1515 | } |
jmasa@4196 | 1516 | sm->deallocate(dummy_block, raw_word_size); |
coleenp@4037 | 1517 | } |
coleenp@4037 | 1518 | } else { |
coleenp@4037 | 1519 | Metadebug::inc_deallocate_block_a_lot_count(); |
coleenp@4037 | 1520 | } |
coleenp@4037 | 1521 | #endif |
coleenp@4037 | 1522 | } |
coleenp@4037 | 1523 | |
coleenp@4037 | 1524 | void Metadebug::init_allocation_fail_alot_count() { |
coleenp@4037 | 1525 | if (MetadataAllocationFailALot) { |
coleenp@4037 | 1526 | _allocation_fail_alot_count = |
coleenp@4037 | 1527 | 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
coleenp@4037 | 1528 | } |
coleenp@4037 | 1529 | } |
coleenp@4037 | 1530 | |
coleenp@4037 | 1531 | #ifdef ASSERT |
coleenp@4037 | 1532 | bool Metadebug::test_metadata_failure() { |
coleenp@4037 | 1533 | if (MetadataAllocationFailALot && |
coleenp@4037 | 1534 | Threads::is_vm_complete()) { |
coleenp@4037 | 1535 | if (_allocation_fail_alot_count > 0) { |
coleenp@4037 | 1536 | _allocation_fail_alot_count--; |
coleenp@4037 | 1537 | } else { |
coleenp@4037 | 1538 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1539 | gclog_or_tty->print_cr("Metadata allocation failing for " |
coleenp@4037 | 1540 | "MetadataAllocationFailALot"); |
coleenp@4037 | 1541 | } |
coleenp@4037 | 1542 | init_allocation_fail_alot_count(); |
coleenp@4037 | 1543 | return true; |
coleenp@4037 | 1544 | } |
coleenp@4037 | 1545 | } |
coleenp@4037 | 1546 | return false; |
coleenp@4037 | 1547 | } |
coleenp@4037 | 1548 | #endif |
coleenp@4037 | 1549 | |
coleenp@4037 | 1550 | // ChunkManager methods |
coleenp@4037 | 1551 | |
ehelin@5703 | 1552 | size_t ChunkManager::free_chunks_total_words() { |
coleenp@4037 | 1553 | return _free_chunks_total; |
coleenp@4037 | 1554 | } |
coleenp@4037 | 1555 | |
ehelin@5703 | 1556 | size_t ChunkManager::free_chunks_total_bytes() { |
ehelin@5703 | 1557 | return free_chunks_total_words() * BytesPerWord; |
coleenp@4037 | 1558 | } |
coleenp@4037 | 1559 | |
coleenp@4037 | 1560 | size_t ChunkManager::free_chunks_count() { |
coleenp@4037 | 1561 | #ifdef ASSERT |
coleenp@4037 | 1562 | if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
coleenp@4037 | 1563 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1564 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1565 | // This lock is only needed in debug because the verification |
coleenp@4037 | 1566 | // of the _free_chunks_totals walks the list of free chunks |
mgerdin@4264 | 1567 | slow_locked_verify_free_chunks_count(); |
coleenp@4037 | 1568 | } |
coleenp@4037 | 1569 | #endif |
mgerdin@4264 | 1570 | return _free_chunks_count; |
coleenp@4037 | 1571 | } |
coleenp@4037 | 1572 | |
coleenp@4037 | 1573 | void ChunkManager::locked_verify_free_chunks_total() { |
coleenp@4037 | 1574 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1575 | assert(sum_free_chunks() == _free_chunks_total, |
coleenp@4037 | 1576 | err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
coleenp@4037 | 1577 | " same as sum " SIZE_FORMAT, _free_chunks_total, |
coleenp@4037 | 1578 | sum_free_chunks())); |
coleenp@4037 | 1579 | } |
coleenp@4037 | 1580 | |
coleenp@4037 | 1581 | void ChunkManager::verify_free_chunks_total() { |
coleenp@4037 | 1582 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1583 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1584 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1585 | } |
coleenp@4037 | 1586 | |
coleenp@4037 | 1587 | void ChunkManager::locked_verify_free_chunks_count() { |
coleenp@4037 | 1588 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1589 | assert(sum_free_chunks_count() == _free_chunks_count, |
coleenp@4037 | 1590 | err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
coleenp@4037 | 1591 | " same as sum " SIZE_FORMAT, _free_chunks_count, |
coleenp@4037 | 1592 | sum_free_chunks_count())); |
coleenp@4037 | 1593 | } |
coleenp@4037 | 1594 | |
coleenp@4037 | 1595 | void ChunkManager::verify_free_chunks_count() { |
coleenp@4037 | 1596 | #ifdef ASSERT |
coleenp@4037 | 1597 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1598 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1599 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1600 | #endif |
coleenp@4037 | 1601 | } |
coleenp@4037 | 1602 | |
coleenp@4037 | 1603 | void ChunkManager::verify() { |
mgerdin@4264 | 1604 | MutexLockerEx cl(SpaceManager::expand_lock(), |
mgerdin@4264 | 1605 | Mutex::_no_safepoint_check_flag); |
mgerdin@4264 | 1606 | locked_verify(); |
coleenp@4037 | 1607 | } |
coleenp@4037 | 1608 | |
coleenp@4037 | 1609 | void ChunkManager::locked_verify() { |
jmasa@4196 | 1610 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1611 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1612 | } |
coleenp@4037 | 1613 | |
coleenp@4037 | 1614 | void ChunkManager::locked_print_free_chunks(outputStream* st) { |
coleenp@4037 | 1615 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4382 | 1616 | st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
coleenp@4037 | 1617 | _free_chunks_total, _free_chunks_count); |
coleenp@4037 | 1618 | } |
coleenp@4037 | 1619 | |
coleenp@4037 | 1620 | void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
coleenp@4037 | 1621 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4382 | 1622 | st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
coleenp@4037 | 1623 | sum_free_chunks(), sum_free_chunks_count()); |
coleenp@4037 | 1624 | } |
coleenp@4037 | 1625 | ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
coleenp@4037 | 1626 | return &_free_chunks[index]; |
coleenp@4037 | 1627 | } |
coleenp@4037 | 1628 | |
coleenp@4037 | 1629 | // These methods that sum the free chunk lists are used in printing |
coleenp@4037 | 1630 | // methods that are used in product builds. |
coleenp@4037 | 1631 | size_t ChunkManager::sum_free_chunks() { |
coleenp@4037 | 1632 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1633 | size_t result = 0; |
jmasa@4382 | 1634 | for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1635 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1636 | |
coleenp@4037 | 1637 | if (list == NULL) { |
coleenp@4037 | 1638 | continue; |
coleenp@4037 | 1639 | } |
coleenp@4037 | 1640 | |
jmasa@4932 | 1641 | result = result + list->count() * list->size(); |
coleenp@4037 | 1642 | } |
jmasa@4196 | 1643 | result = result + humongous_dictionary()->total_size(); |
coleenp@4037 | 1644 | return result; |
coleenp@4037 | 1645 | } |
coleenp@4037 | 1646 | |
coleenp@4037 | 1647 | size_t ChunkManager::sum_free_chunks_count() { |
coleenp@4037 | 1648 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1649 | size_t count = 0; |
jmasa@4382 | 1650 | for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1651 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1652 | if (list == NULL) { |
coleenp@4037 | 1653 | continue; |
coleenp@4037 | 1654 | } |
jmasa@4932 | 1655 | count = count + list->count(); |
coleenp@4037 | 1656 | } |
jmasa@4196 | 1657 | count = count + humongous_dictionary()->total_free_blocks(); |
coleenp@4037 | 1658 | return count; |
coleenp@4037 | 1659 | } |
coleenp@4037 | 1660 | |
coleenp@4037 | 1661 | ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
jmasa@4382 | 1662 | ChunkIndex index = list_index(word_size); |
jmasa@4382 | 1663 | assert(index < HumongousIndex, "No humongous list"); |
jmasa@4382 | 1664 | return free_chunks(index); |
coleenp@4037 | 1665 | } |
coleenp@4037 | 1666 | |
coleenp@4037 | 1667 | void ChunkManager::free_chunks_put(Metachunk* chunk) { |
coleenp@4037 | 1668 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1669 | ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
coleenp@4037 | 1670 | chunk->set_next(free_list->head()); |
coleenp@4037 | 1671 | free_list->set_head(chunk); |
coleenp@4037 | 1672 | // chunk is being returned to the chunk free list |
coleenp@4037 | 1673 | inc_free_chunks_total(chunk->capacity_word_size()); |
mgerdin@4264 | 1674 | slow_locked_verify(); |
coleenp@4037 | 1675 | } |
coleenp@4037 | 1676 | |
coleenp@4037 | 1677 | void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
coleenp@4037 | 1678 | // The deallocation of a chunk originates in the freelist |
coleenp@4037 | 1679 | // manangement code for a Metaspace and does not hold the |
coleenp@4037 | 1680 | // lock. |
coleenp@4037 | 1681 | assert(chunk != NULL, "Deallocating NULL"); |
mgerdin@4264 | 1682 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@4264 | 1683 | slow_locked_verify(); |
coleenp@4037 | 1684 | if (TraceMetadataChunkAllocation) { |
stefank@5708 | 1685 | gclog_or_tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
stefank@5708 | 1686 | PTR_FORMAT " size " SIZE_FORMAT, |
stefank@5708 | 1687 | chunk, chunk->word_size()); |
coleenp@4037 | 1688 | } |
coleenp@4037 | 1689 | free_chunks_put(chunk); |
coleenp@4037 | 1690 | } |
coleenp@4037 | 1691 | |
coleenp@4037 | 1692 | Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
coleenp@4037 | 1693 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1694 | |
mgerdin@4264 | 1695 | slow_locked_verify(); |
jmasa@4196 | 1696 | |
jmasa@4196 | 1697 | Metachunk* chunk = NULL; |
jmasa@4382 | 1698 | if (list_index(word_size) != HumongousIndex) { |
jmasa@4196 | 1699 | ChunkList* free_list = find_free_chunks_list(word_size); |
jmasa@4196 | 1700 | assert(free_list != NULL, "Sanity check"); |
jmasa@4196 | 1701 | |
jmasa@4196 | 1702 | chunk = free_list->head(); |
jmasa@4196 | 1703 | debug_only(Metachunk* debug_head = chunk;) |
jmasa@4196 | 1704 | |
jmasa@4196 | 1705 | if (chunk == NULL) { |
jmasa@4196 | 1706 | return NULL; |
jmasa@4196 | 1707 | } |
jmasa@4196 | 1708 | |
coleenp@4037 | 1709 | // Remove the chunk as the head of the list. |
jmasa@4932 | 1710 | free_list->remove_chunk(chunk); |
jmasa@4382 | 1711 | |
jmasa@4382 | 1712 | // Chunk is being removed from the chunks free list. |
jmasa@4196 | 1713 | dec_free_chunks_total(chunk->capacity_word_size()); |
coleenp@4037 | 1714 | |
coleenp@4037 | 1715 | if (TraceMetadataChunkAllocation && Verbose) { |
stefank@5708 | 1716 | gclog_or_tty->print_cr("ChunkManager::free_chunks_get: free_list " |
stefank@5708 | 1717 | PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
stefank@5708 | 1718 | free_list, chunk, chunk->word_size()); |
coleenp@4037 | 1719 | } |
coleenp@4037 | 1720 | } else { |
jmasa@4196 | 1721 | chunk = humongous_dictionary()->get_chunk( |
jmasa@4196 | 1722 | word_size, |
jmasa@4196 | 1723 | FreeBlockDictionary<Metachunk>::atLeast); |
jmasa@4196 | 1724 | |
jmasa@4196 | 1725 | if (chunk != NULL) { |
jmasa@4196 | 1726 | if (TraceMetadataHumongousAllocation) { |
jmasa@4196 | 1727 | size_t waste = chunk->word_size() - word_size; |
stefank@5708 | 1728 | gclog_or_tty->print_cr("Free list allocate humongous chunk size " |
stefank@5708 | 1729 | SIZE_FORMAT " for requested size " SIZE_FORMAT |
stefank@5708 | 1730 | " waste " SIZE_FORMAT, |
stefank@5708 | 1731 | chunk->word_size(), word_size, waste); |
coleenp@4037 | 1732 | } |
jmasa@4196 | 1733 | // Chunk is being removed from the chunks free list. |
jmasa@4196 | 1734 | dec_free_chunks_total(chunk->capacity_word_size()); |
jmasa@4382 | 1735 | } else { |
jmasa@4382 | 1736 | return NULL; |
coleenp@4037 | 1737 | } |
coleenp@4037 | 1738 | } |
jmasa@4382 | 1739 | |
jmasa@4382 | 1740 | // Remove it from the links to this freelist |
jmasa@4382 | 1741 | chunk->set_next(NULL); |
jmasa@4382 | 1742 | chunk->set_prev(NULL); |
jmasa@5007 | 1743 | #ifdef ASSERT |
jmasa@5007 | 1744 | // Chunk is no longer on any freelist. Setting to false make container_count_slow() |
jmasa@5007 | 1745 | // work. |
jmasa@5007 | 1746 | chunk->set_is_free(false); |
jmasa@5007 | 1747 | #endif |
stefank@5771 | 1748 | chunk->container()->inc_container_count(); |
stefank@5771 | 1749 | |
mgerdin@4264 | 1750 | slow_locked_verify(); |
coleenp@4037 | 1751 | return chunk; |
coleenp@4037 | 1752 | } |
coleenp@4037 | 1753 | |
coleenp@4037 | 1754 | Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
coleenp@4037 | 1755 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@4264 | 1756 | slow_locked_verify(); |
coleenp@4037 | 1757 | |
coleenp@4037 | 1758 | // Take from the beginning of the list |
coleenp@4037 | 1759 | Metachunk* chunk = free_chunks_get(word_size); |
coleenp@4037 | 1760 | if (chunk == NULL) { |
coleenp@4037 | 1761 | return NULL; |
coleenp@4037 | 1762 | } |
coleenp@4037 | 1763 | |
jmasa@4382 | 1764 | assert((word_size <= chunk->word_size()) || |
jmasa@4382 | 1765 | list_index(chunk->word_size() == HumongousIndex), |
jmasa@4382 | 1766 | "Non-humongous variable sized chunk"); |
coleenp@4037 | 1767 | if (TraceMetadataChunkAllocation) { |
jmasa@4382 | 1768 | size_t list_count; |
jmasa@4382 | 1769 | if (list_index(word_size) < HumongousIndex) { |
jmasa@4382 | 1770 | ChunkList* list = find_free_chunks_list(word_size); |
jmasa@4932 | 1771 | list_count = list->count(); |
jmasa@4382 | 1772 | } else { |
jmasa@4382 | 1773 | list_count = humongous_dictionary()->total_count(); |
jmasa@4382 | 1774 | } |
stefank@5708 | 1775 | gclog_or_tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
stefank@5708 | 1776 | PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
stefank@5708 | 1777 | this, chunk, chunk->word_size(), list_count); |
stefank@5708 | 1778 | locked_print_free_chunks(gclog_or_tty); |
coleenp@4037 | 1779 | } |
coleenp@4037 | 1780 | |
coleenp@4037 | 1781 | return chunk; |
coleenp@4037 | 1782 | } |
coleenp@4037 | 1783 | |
stefank@5771 | 1784 | void ChunkManager::print_on(outputStream* out) const { |
jmasa@4196 | 1785 | if (PrintFLSStatistics != 0) { |
stefank@5771 | 1786 | const_cast<ChunkManager *>(this)->humongous_dictionary()->report_statistics(); |
jmasa@4196 | 1787 | } |
jmasa@4196 | 1788 | } |
jmasa@4196 | 1789 | |
coleenp@4037 | 1790 | // SpaceManager methods |
coleenp@4037 | 1791 | |
jmasa@4382 | 1792 | void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
jmasa@4382 | 1793 | size_t* chunk_word_size, |
jmasa@4382 | 1794 | size_t* class_chunk_word_size) { |
jmasa@4382 | 1795 | switch (type) { |
jmasa@4382 | 1796 | case Metaspace::BootMetaspaceType: |
jmasa@4382 | 1797 | *chunk_word_size = Metaspace::first_chunk_word_size(); |
jmasa@4382 | 1798 | *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
jmasa@4382 | 1799 | break; |
jmasa@4382 | 1800 | case Metaspace::ROMetaspaceType: |
jmasa@4382 | 1801 | *chunk_word_size = SharedReadOnlySize / wordSize; |
jmasa@4382 | 1802 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1803 | break; |
jmasa@4382 | 1804 | case Metaspace::ReadWriteMetaspaceType: |
jmasa@4382 | 1805 | *chunk_word_size = SharedReadWriteSize / wordSize; |
jmasa@4382 | 1806 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1807 | break; |
jmasa@4382 | 1808 | case Metaspace::AnonymousMetaspaceType: |
jmasa@4382 | 1809 | case Metaspace::ReflectionMetaspaceType: |
jmasa@4382 | 1810 | *chunk_word_size = SpecializedChunk; |
jmasa@4382 | 1811 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1812 | break; |
jmasa@4382 | 1813 | default: |
jmasa@4382 | 1814 | *chunk_word_size = SmallChunk; |
jmasa@4382 | 1815 | *class_chunk_word_size = ClassSmallChunk; |
jmasa@4382 | 1816 | break; |
jmasa@4382 | 1817 | } |
mikael@4548 | 1818 | assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
jmasa@4382 | 1819 | err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
jmasa@4382 | 1820 | " class " SIZE_FORMAT, |
mikael@4548 | 1821 | *chunk_word_size, *class_chunk_word_size)); |
jmasa@4382 | 1822 | } |
jmasa@4382 | 1823 | |
coleenp@4037 | 1824 | size_t SpaceManager::sum_free_in_chunks_in_use() const { |
coleenp@4037 | 1825 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1826 | size_t free = 0; |
jmasa@4382 | 1827 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1828 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1829 | while (chunk != NULL) { |
coleenp@4037 | 1830 | free += chunk->free_word_size(); |
coleenp@4037 | 1831 | chunk = chunk->next(); |
coleenp@4037 | 1832 | } |
coleenp@4037 | 1833 | } |
coleenp@4037 | 1834 | return free; |
coleenp@4037 | 1835 | } |
coleenp@4037 | 1836 | |
coleenp@4037 | 1837 | size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
coleenp@4037 | 1838 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1839 | size_t result = 0; |
jmasa@4382 | 1840 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1841 | result += sum_waste_in_chunks_in_use(i); |
coleenp@4037 | 1842 | } |
jmasa@4196 | 1843 | |
coleenp@4037 | 1844 | return result; |
coleenp@4037 | 1845 | } |
coleenp@4037 | 1846 | |
coleenp@4037 | 1847 | size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
coleenp@4037 | 1848 | size_t result = 0; |
coleenp@4037 | 1849 | Metachunk* chunk = chunks_in_use(index); |
coleenp@4037 | 1850 | // Count the free space in all the chunk but not the |
coleenp@4037 | 1851 | // current chunk from which allocations are still being done. |
coleenp@5337 | 1852 | while (chunk != NULL) { |
coleenp@5337 | 1853 | if (chunk != current_chunk()) { |
jmasa@4196 | 1854 | result += chunk->free_word_size(); |
coleenp@4037 | 1855 | } |
coleenp@5337 | 1856 | chunk = chunk->next(); |
coleenp@4037 | 1857 | } |
coleenp@4037 | 1858 | return result; |
coleenp@4037 | 1859 | } |
coleenp@4037 | 1860 | |
coleenp@4037 | 1861 | size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
jmasa@5015 | 1862 | // For CMS use "allocated_chunks_words()" which does not need the |
jmasa@5015 | 1863 | // Metaspace lock. For the other collectors sum over the |
jmasa@5015 | 1864 | // lists. Use both methods as a check that "allocated_chunks_words()" |
jmasa@5015 | 1865 | // is correct. That is, sum_capacity_in_chunks() is too expensive |
jmasa@5015 | 1866 | // to use in the product and allocated_chunks_words() should be used |
jmasa@5015 | 1867 | // but allow for checking that allocated_chunks_words() returns the same |
jmasa@5015 | 1868 | // value as sum_capacity_in_chunks_in_use() which is the definitive |
jmasa@5015 | 1869 | // answer. |
jmasa@5015 | 1870 | if (UseConcMarkSweepGC) { |
jmasa@5015 | 1871 | return allocated_chunks_words(); |
jmasa@5015 | 1872 | } else { |
jmasa@5015 | 1873 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
jmasa@5015 | 1874 | size_t sum = 0; |
jmasa@5015 | 1875 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
jmasa@5015 | 1876 | Metachunk* chunk = chunks_in_use(i); |
jmasa@5015 | 1877 | while (chunk != NULL) { |
jmasa@5015 | 1878 | sum += chunk->capacity_word_size(); |
jmasa@5015 | 1879 | chunk = chunk->next(); |
jmasa@5015 | 1880 | } |
coleenp@4037 | 1881 | } |
jmasa@5015 | 1882 | return sum; |
coleenp@4037 | 1883 | } |
coleenp@4037 | 1884 | } |
coleenp@4037 | 1885 | |
coleenp@4037 | 1886 | size_t SpaceManager::sum_count_in_chunks_in_use() { |
coleenp@4037 | 1887 | size_t count = 0; |
jmasa@4382 | 1888 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1889 | count = count + sum_count_in_chunks_in_use(i); |
coleenp@4037 | 1890 | } |
jmasa@4196 | 1891 | |
coleenp@4037 | 1892 | return count; |
coleenp@4037 | 1893 | } |
coleenp@4037 | 1894 | |
coleenp@4037 | 1895 | size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
coleenp@4037 | 1896 | size_t count = 0; |
coleenp@4037 | 1897 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1898 | while (chunk != NULL) { |
coleenp@4037 | 1899 | count++; |
coleenp@4037 | 1900 | chunk = chunk->next(); |
coleenp@4037 | 1901 | } |
coleenp@4037 | 1902 | return count; |
coleenp@4037 | 1903 | } |
coleenp@4037 | 1904 | |
coleenp@4037 | 1905 | |
coleenp@4037 | 1906 | size_t SpaceManager::sum_used_in_chunks_in_use() const { |
coleenp@4037 | 1907 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1908 | size_t used = 0; |
jmasa@4382 | 1909 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1910 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1911 | while (chunk != NULL) { |
coleenp@4037 | 1912 | used += chunk->used_word_size(); |
coleenp@4037 | 1913 | chunk = chunk->next(); |
coleenp@4037 | 1914 | } |
coleenp@4037 | 1915 | } |
coleenp@4037 | 1916 | return used; |
coleenp@4037 | 1917 | } |
coleenp@4037 | 1918 | |
coleenp@4037 | 1919 | void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
coleenp@4037 | 1920 | |
jmasa@4382 | 1921 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
jmasa@4382 | 1922 | Metachunk* chunk = chunks_in_use(i); |
jmasa@4382 | 1923 | st->print("SpaceManager: %s " PTR_FORMAT, |
jmasa@4382 | 1924 | chunk_size_name(i), chunk); |
jmasa@4382 | 1925 | if (chunk != NULL) { |
jmasa@4382 | 1926 | st->print_cr(" free " SIZE_FORMAT, |
jmasa@4382 | 1927 | chunk->free_word_size()); |
jmasa@4382 | 1928 | } else { |
jmasa@4382 | 1929 | st->print_cr(""); |
jmasa@4382 | 1930 | } |
jmasa@4382 | 1931 | } |
coleenp@4037 | 1932 | |
stefank@5771 | 1933 | chunk_manager()->locked_print_free_chunks(st); |
stefank@5771 | 1934 | chunk_manager()->locked_print_sum_free_chunks(st); |
coleenp@4037 | 1935 | } |
coleenp@4037 | 1936 | |
coleenp@4037 | 1937 | size_t SpaceManager::calc_chunk_size(size_t word_size) { |
coleenp@4037 | 1938 | |
coleenp@4037 | 1939 | // Decide between a small chunk and a medium chunk. Up to |
coleenp@4037 | 1940 | // _small_chunk_limit small chunks can be allocated but |
coleenp@4037 | 1941 | // once a medium chunk has been allocated, no more small |
coleenp@4037 | 1942 | // chunks will be allocated. |
coleenp@4037 | 1943 | size_t chunk_word_size; |
coleenp@4037 | 1944 | if (chunks_in_use(MediumIndex) == NULL && |
coleenp@5337 | 1945 | sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
jmasa@4382 | 1946 | chunk_word_size = (size_t) small_chunk_size(); |
jmasa@4382 | 1947 | if (word_size + Metachunk::overhead() > small_chunk_size()) { |
jmasa@4382 | 1948 | chunk_word_size = medium_chunk_size(); |
coleenp@4037 | 1949 | } |
coleenp@4037 | 1950 | } else { |
jmasa@4382 | 1951 | chunk_word_size = medium_chunk_size(); |
coleenp@4037 | 1952 | } |
coleenp@4037 | 1953 | |
jmasa@4382 | 1954 | // Might still need a humongous chunk. Enforce an |
jmasa@4382 | 1955 | // eight word granularity to facilitate reuse (some |
jmasa@4382 | 1956 | // wastage but better chance of reuse). |
jmasa@4382 | 1957 | size_t if_humongous_sized_chunk = |
jmasa@4382 | 1958 | align_size_up(word_size + Metachunk::overhead(), |
jmasa@4382 | 1959 | HumongousChunkGranularity); |
coleenp@4037 | 1960 | chunk_word_size = |
jmasa@4382 | 1961 | MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
jmasa@4382 | 1962 | |
jmasa@4382 | 1963 | assert(!SpaceManager::is_humongous(word_size) || |
jmasa@4382 | 1964 | chunk_word_size == if_humongous_sized_chunk, |
jmasa@4382 | 1965 | err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
jmasa@4382 | 1966 | " chunk_word_size " SIZE_FORMAT, |
jmasa@4382 | 1967 | word_size, chunk_word_size)); |
coleenp@4037 | 1968 | if (TraceMetadataHumongousAllocation && |
coleenp@4037 | 1969 | SpaceManager::is_humongous(word_size)) { |
coleenp@4037 | 1970 | gclog_or_tty->print_cr("Metadata humongous allocation:"); |
coleenp@4037 | 1971 | gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
coleenp@4037 | 1972 | gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
coleenp@4037 | 1973 | chunk_word_size); |
jmasa@4196 | 1974 | gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
coleenp@4037 | 1975 | Metachunk::overhead()); |
coleenp@4037 | 1976 | } |
coleenp@4037 | 1977 | return chunk_word_size; |
coleenp@4037 | 1978 | } |
coleenp@4037 | 1979 | |
jmasa@4196 | 1980 | MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
coleenp@4037 | 1981 | assert(vs_list()->current_virtual_space() != NULL, |
coleenp@4037 | 1982 | "Should have been set"); |
coleenp@4037 | 1983 | assert(current_chunk() == NULL || |
coleenp@4037 | 1984 | current_chunk()->allocate(word_size) == NULL, |
coleenp@4037 | 1985 | "Don't need to expand"); |
coleenp@4037 | 1986 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1987 | |
coleenp@4037 | 1988 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 1989 | size_t words_left = 0; |
jmasa@4382 | 1990 | size_t words_used = 0; |
jmasa@4382 | 1991 | if (current_chunk() != NULL) { |
jmasa@4382 | 1992 | words_left = current_chunk()->free_word_size(); |
jmasa@4382 | 1993 | words_used = current_chunk()->used_word_size(); |
jmasa@4382 | 1994 | } |
coleenp@4037 | 1995 | gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
jmasa@4382 | 1996 | " words " SIZE_FORMAT " words used " SIZE_FORMAT |
jmasa@4382 | 1997 | " words left", |
jmasa@4382 | 1998 | word_size, words_used, words_left); |
coleenp@4037 | 1999 | } |
coleenp@4037 | 2000 | |
coleenp@4037 | 2001 | // Get another chunk out of the virtual space |
coleenp@4037 | 2002 | size_t grow_chunks_by_words = calc_chunk_size(word_size); |
jmasa@4382 | 2003 | Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
coleenp@4037 | 2004 | |
coleenp@4037 | 2005 | // If a chunk was available, add it to the in-use chunk list |
coleenp@4037 | 2006 | // and do an allocation from it. |
coleenp@4037 | 2007 | if (next != NULL) { |
coleenp@4037 | 2008 | Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
coleenp@4037 | 2009 | // Add to this manager's list of chunks in use. |
coleenp@4037 | 2010 | add_chunk(next, false); |
coleenp@4037 | 2011 | return next->allocate(word_size); |
coleenp@4037 | 2012 | } |
coleenp@4037 | 2013 | return NULL; |
coleenp@4037 | 2014 | } |
coleenp@4037 | 2015 | |
coleenp@4037 | 2016 | void SpaceManager::print_on(outputStream* st) const { |
coleenp@4037 | 2017 | |
jmasa@4382 | 2018 | for (ChunkIndex i = ZeroIndex; |
jmasa@4196 | 2019 | i < NumberOfInUseLists ; |
coleenp@4037 | 2020 | i = next_chunk_index(i) ) { |
coleenp@4037 | 2021 | st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
coleenp@4037 | 2022 | chunks_in_use(i), |
coleenp@4037 | 2023 | chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
coleenp@4037 | 2024 | } |
coleenp@4037 | 2025 | st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
coleenp@4037 | 2026 | " Humongous " SIZE_FORMAT, |
coleenp@4037 | 2027 | sum_waste_in_chunks_in_use(SmallIndex), |
coleenp@4037 | 2028 | sum_waste_in_chunks_in_use(MediumIndex), |
coleenp@4037 | 2029 | sum_waste_in_chunks_in_use(HumongousIndex)); |
jmasa@4196 | 2030 | // block free lists |
jmasa@4196 | 2031 | if (block_freelists() != NULL) { |
jmasa@4196 | 2032 | st->print_cr("total in block free lists " SIZE_FORMAT, |
jmasa@4196 | 2033 | block_freelists()->total_size()); |
jmasa@4196 | 2034 | } |
coleenp@4037 | 2035 | } |
coleenp@4037 | 2036 | |
jmasa@5162 | 2037 | SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
stefank@5771 | 2038 | Mutex* lock) : |
jmasa@5162 | 2039 | _mdtype(mdtype), |
jmasa@5015 | 2040 | _allocated_blocks_words(0), |
jmasa@5015 | 2041 | _allocated_chunks_words(0), |
jmasa@5015 | 2042 | _allocated_chunks_count(0), |
jmasa@4382 | 2043 | _lock(lock) |
jmasa@4382 | 2044 | { |
jmasa@4382 | 2045 | initialize(); |
jmasa@4382 | 2046 | } |
jmasa@4382 | 2047 | |
jmasa@5015 | 2048 | void SpaceManager::inc_size_metrics(size_t words) { |
jmasa@5015 | 2049 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5015 | 2050 | // Total of allocated Metachunks and allocated Metachunks count |
jmasa@5015 | 2051 | // for each SpaceManager |
jmasa@5015 | 2052 | _allocated_chunks_words = _allocated_chunks_words + words; |
jmasa@5015 | 2053 | _allocated_chunks_count++; |
jmasa@5015 | 2054 | // Global total of capacity in allocated Metachunks |
jmasa@5162 | 2055 | MetaspaceAux::inc_capacity(mdtype(), words); |
jmasa@5015 | 2056 | // Global total of allocated Metablocks. |
jmasa@5015 | 2057 | // used_words_slow() includes the overhead in each |
jmasa@5015 | 2058 | // Metachunk so include it in the used when the |
jmasa@5015 | 2059 | // Metachunk is first added (so only added once per |
jmasa@5015 | 2060 | // Metachunk). |
jmasa@5162 | 2061 | MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
jmasa@5015 | 2062 | } |
jmasa@5015 | 2063 | |
jmasa@5015 | 2064 | void SpaceManager::inc_used_metrics(size_t words) { |
jmasa@5015 | 2065 | // Add to the per SpaceManager total |
jmasa@5015 | 2066 | Atomic::add_ptr(words, &_allocated_blocks_words); |
jmasa@5015 | 2067 | // Add to the global total |
jmasa@5162 | 2068 | MetaspaceAux::inc_used(mdtype(), words); |
jmasa@5015 | 2069 | } |
jmasa@5015 | 2070 | |
jmasa@5015 | 2071 | void SpaceManager::dec_total_from_size_metrics() { |
jmasa@5162 | 2072 | MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
jmasa@5162 | 2073 | MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
jmasa@5015 | 2074 | // Also deduct the overhead per Metachunk |
jmasa@5162 | 2075 | MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
jmasa@5015 | 2076 | } |
jmasa@5015 | 2077 | |
jmasa@4382 | 2078 | void SpaceManager::initialize() { |
coleenp@4037 | 2079 | Metadebug::init_allocation_fail_alot_count(); |
jmasa@4382 | 2080 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 2081 | _chunks_in_use[i] = NULL; |
coleenp@4037 | 2082 | } |
coleenp@4037 | 2083 | _current_chunk = NULL; |
coleenp@4037 | 2084 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2085 | gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 2086 | } |
coleenp@4037 | 2087 | } |
coleenp@4037 | 2088 | |
jmasa@4932 | 2089 | void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
jmasa@4932 | 2090 | if (chunks == NULL) { |
jmasa@4932 | 2091 | return; |
jmasa@4932 | 2092 | } |
jmasa@4932 | 2093 | ChunkList* list = free_chunks(index); |
jmasa@4932 | 2094 | assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
jmasa@4932 | 2095 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4932 | 2096 | Metachunk* cur = chunks; |
jmasa@4932 | 2097 | |
jmasa@5007 | 2098 | // This returns chunks one at a time. If a new |
jmasa@4932 | 2099 | // class List can be created that is a base class |
jmasa@4932 | 2100 | // of FreeList then something like FreeList::prepend() |
jmasa@4932 | 2101 | // can be used in place of this loop |
jmasa@4932 | 2102 | while (cur != NULL) { |
jmasa@5007 | 2103 | assert(cur->container() != NULL, "Container should have been set"); |
jmasa@5007 | 2104 | cur->container()->dec_container_count(); |
jmasa@4932 | 2105 | // Capture the next link before it is changed |
jmasa@4932 | 2106 | // by the call to return_chunk_at_head(); |
jmasa@4932 | 2107 | Metachunk* next = cur->next(); |
jmasa@4932 | 2108 | cur->set_is_free(true); |
jmasa@4932 | 2109 | list->return_chunk_at_head(cur); |
jmasa@4932 | 2110 | cur = next; |
jmasa@4932 | 2111 | } |
jmasa@4932 | 2112 | } |
jmasa@4932 | 2113 | |
coleenp@4037 | 2114 | SpaceManager::~SpaceManager() { |
mgerdin@4784 | 2115 | // This call this->_lock which can't be done while holding expand_lock() |
jmasa@5015 | 2116 | assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
jmasa@5015 | 2117 | err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
jmasa@5015 | 2118 | " allocated_chunks_words() " SIZE_FORMAT, |
jmasa@5015 | 2119 | sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
mgerdin@4784 | 2120 | |
coleenp@4037 | 2121 | MutexLockerEx fcl(SpaceManager::expand_lock(), |
coleenp@4037 | 2122 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2123 | |
stefank@5771 | 2124 | chunk_manager()->slow_locked_verify(); |
coleenp@4037 | 2125 | |
jmasa@5015 | 2126 | dec_total_from_size_metrics(); |
jmasa@5015 | 2127 | |
coleenp@4037 | 2128 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2129 | gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 2130 | locked_print_chunks_in_use_on(gclog_or_tty); |
coleenp@4037 | 2131 | } |
coleenp@4037 | 2132 | |
jmasa@5007 | 2133 | // Do not mangle freed Metachunks. The chunk size inside Metachunks |
jmasa@5007 | 2134 | // is during the freeing of a VirtualSpaceNodes. |
coleenp@4304 | 2135 | |
coleenp@4037 | 2136 | // Have to update before the chunks_in_use lists are emptied |
coleenp@4037 | 2137 | // below. |
stefank@5771 | 2138 | chunk_manager()->inc_free_chunks_total(allocated_chunks_words(), |
stefank@5771 | 2139 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 2140 | |
coleenp@4037 | 2141 | // Add all the chunks in use by this space manager |
coleenp@4037 | 2142 | // to the global list of free chunks. |
coleenp@4037 | 2143 | |
jmasa@4382 | 2144 | // Follow each list of chunks-in-use and add them to the |
jmasa@4382 | 2145 | // free lists. Each list is NULL terminated. |
jmasa@4382 | 2146 | |
jmasa@4382 | 2147 | for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
jmasa@4382 | 2148 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2149 | gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
jmasa@4382 | 2150 | sum_count_in_chunks_in_use(i), |
jmasa@4382 | 2151 | chunk_size_name(i)); |
jmasa@4382 | 2152 | } |
jmasa@4382 | 2153 | Metachunk* chunks = chunks_in_use(i); |
stefank@5771 | 2154 | chunk_manager()->return_chunks(i, chunks); |
jmasa@4382 | 2155 | set_chunks_in_use(i, NULL); |
jmasa@4382 | 2156 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2157 | gclog_or_tty->print_cr("updated freelist count %d %s", |
stefank@5771 | 2158 | chunk_manager()->free_chunks(i)->count(), |
jmasa@4382 | 2159 | chunk_size_name(i)); |
jmasa@4382 | 2160 | } |
jmasa@4382 | 2161 | assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
coleenp@4037 | 2162 | } |
coleenp@4037 | 2163 | |
jmasa@4382 | 2164 | // The medium chunk case may be optimized by passing the head and |
jmasa@4382 | 2165 | // tail of the medium chunk list to add_at_head(). The tail is often |
jmasa@4382 | 2166 | // the current chunk but there are probably exceptions. |
jmasa@4382 | 2167 | |
coleenp@4037 | 2168 | // Humongous chunks |
jmasa@4382 | 2169 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2170 | gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
jmasa@4382 | 2171 | sum_count_in_chunks_in_use(HumongousIndex), |
jmasa@4382 | 2172 | chunk_size_name(HumongousIndex)); |
jmasa@4382 | 2173 | gclog_or_tty->print("Humongous chunk dictionary: "); |
jmasa@4382 | 2174 | } |
coleenp@4037 | 2175 | // Humongous chunks are never the current chunk. |
coleenp@4037 | 2176 | Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
coleenp@4037 | 2177 | |
jmasa@4196 | 2178 | while (humongous_chunks != NULL) { |
jmasa@4196 | 2179 | #ifdef ASSERT |
jmasa@4196 | 2180 | humongous_chunks->set_is_free(true); |
jmasa@4196 | 2181 | #endif |
jmasa@4382 | 2182 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2183 | gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
jmasa@4382 | 2184 | humongous_chunks, |
jmasa@4382 | 2185 | humongous_chunks->word_size()); |
jmasa@4382 | 2186 | } |
jmasa@4382 | 2187 | assert(humongous_chunks->word_size() == (size_t) |
jmasa@4382 | 2188 | align_size_up(humongous_chunks->word_size(), |
jmasa@4382 | 2189 | HumongousChunkGranularity), |
jmasa@4382 | 2190 | err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
mikael@4548 | 2191 | " granularity %d", |
jmasa@4382 | 2192 | humongous_chunks->word_size(), HumongousChunkGranularity)); |
jmasa@4196 | 2193 | Metachunk* next_humongous_chunks = humongous_chunks->next(); |
jmasa@5007 | 2194 | humongous_chunks->container()->dec_container_count(); |
stefank@5771 | 2195 | chunk_manager()->humongous_dictionary()->return_chunk(humongous_chunks); |
jmasa@4196 | 2196 | humongous_chunks = next_humongous_chunks; |
coleenp@4037 | 2197 | } |
jmasa@4382 | 2198 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2199 | gclog_or_tty->print_cr(""); |
jmasa@4382 | 2200 | gclog_or_tty->print_cr("updated dictionary count %d %s", |
stefank@5771 | 2201 | chunk_manager()->humongous_dictionary()->total_count(), |
jmasa@4382 | 2202 | chunk_size_name(HumongousIndex)); |
jmasa@4382 | 2203 | } |
stefank@5771 | 2204 | chunk_manager()->slow_locked_verify(); |
coleenp@4037 | 2205 | } |
coleenp@4037 | 2206 | |
jmasa@4382 | 2207 | const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
jmasa@4382 | 2208 | switch (index) { |
jmasa@4382 | 2209 | case SpecializedIndex: |
jmasa@4382 | 2210 | return "Specialized"; |
jmasa@4382 | 2211 | case SmallIndex: |
jmasa@4382 | 2212 | return "Small"; |
jmasa@4382 | 2213 | case MediumIndex: |
jmasa@4382 | 2214 | return "Medium"; |
jmasa@4382 | 2215 | case HumongousIndex: |
jmasa@4382 | 2216 | return "Humongous"; |
jmasa@4382 | 2217 | default: |
jmasa@4382 | 2218 | return NULL; |
jmasa@4382 | 2219 | } |
jmasa@4382 | 2220 | } |
jmasa@4382 | 2221 | |
jmasa@4382 | 2222 | ChunkIndex ChunkManager::list_index(size_t size) { |
jmasa@4382 | 2223 | switch (size) { |
jmasa@4382 | 2224 | case SpecializedChunk: |
jmasa@4382 | 2225 | assert(SpecializedChunk == ClassSpecializedChunk, |
jmasa@4382 | 2226 | "Need branch for ClassSpecializedChunk"); |
jmasa@4382 | 2227 | return SpecializedIndex; |
jmasa@4382 | 2228 | case SmallChunk: |
jmasa@4382 | 2229 | case ClassSmallChunk: |
jmasa@4382 | 2230 | return SmallIndex; |
jmasa@4382 | 2231 | case MediumChunk: |
jmasa@4382 | 2232 | case ClassMediumChunk: |
jmasa@4382 | 2233 | return MediumIndex; |
jmasa@4382 | 2234 | default: |
jmasa@4383 | 2235 | assert(size > MediumChunk || size > ClassMediumChunk, |
jmasa@4382 | 2236 | "Not a humongous chunk"); |
jmasa@4382 | 2237 | return HumongousIndex; |
jmasa@4382 | 2238 | } |
jmasa@4382 | 2239 | } |
jmasa@4382 | 2240 | |
jmasa@4196 | 2241 | void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
coleenp@4037 | 2242 | assert_lock_strong(_lock); |
fparain@5452 | 2243 | size_t raw_word_size = get_raw_word_size(word_size); |
jmasa@4196 | 2244 | size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
fparain@5452 | 2245 | assert(raw_word_size >= min_size, |
hseigel@5528 | 2246 | err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
fparain@5452 | 2247 | block_freelists()->return_block(p, raw_word_size); |
coleenp@4037 | 2248 | } |
coleenp@4037 | 2249 | |
coleenp@4037 | 2250 | // Adds a chunk to the list of chunks in use. |
coleenp@4037 | 2251 | void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
coleenp@4037 | 2252 | |
coleenp@4037 | 2253 | assert(new_chunk != NULL, "Should not be NULL"); |
coleenp@4037 | 2254 | assert(new_chunk->next() == NULL, "Should not be on a list"); |
coleenp@4037 | 2255 | |
coleenp@4037 | 2256 | new_chunk->reset_empty(); |
coleenp@4037 | 2257 | |
coleenp@4037 | 2258 | // Find the correct list and and set the current |
coleenp@4037 | 2259 | // chunk for that list. |
jmasa@4382 | 2260 | ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
jmasa@4382 | 2261 | |
jmasa@4382 | 2262 | if (index != HumongousIndex) { |
mgerdin@5699 | 2263 | retire_current_chunk(); |
coleenp@4037 | 2264 | set_current_chunk(new_chunk); |
jmasa@4382 | 2265 | new_chunk->set_next(chunks_in_use(index)); |
jmasa@4382 | 2266 | set_chunks_in_use(index, new_chunk); |
jmasa@4382 | 2267 | } else { |
coleenp@4037 | 2268 | // For null class loader data and DumpSharedSpaces, the first chunk isn't |
coleenp@4037 | 2269 | // small, so small will be null. Link this first chunk as the current |
coleenp@4037 | 2270 | // chunk. |
coleenp@4037 | 2271 | if (make_current) { |
coleenp@4037 | 2272 | // Set as the current chunk but otherwise treat as a humongous chunk. |
coleenp@4037 | 2273 | set_current_chunk(new_chunk); |
coleenp@4037 | 2274 | } |
coleenp@4037 | 2275 | // Link at head. The _current_chunk only points to a humongous chunk for |
coleenp@4037 | 2276 | // the null class loader metaspace (class and data virtual space managers) |
coleenp@4037 | 2277 | // any humongous chunks so will not point to the tail |
coleenp@4037 | 2278 | // of the humongous chunks list. |
coleenp@4037 | 2279 | new_chunk->set_next(chunks_in_use(HumongousIndex)); |
coleenp@4037 | 2280 | set_chunks_in_use(HumongousIndex, new_chunk); |
coleenp@4037 | 2281 | |
jmasa@4383 | 2282 | assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
coleenp@4037 | 2283 | } |
coleenp@4037 | 2284 | |
jmasa@5015 | 2285 | // Add to the running sum of capacity |
jmasa@5015 | 2286 | inc_size_metrics(new_chunk->word_size()); |
jmasa@5015 | 2287 | |
coleenp@4037 | 2288 | assert(new_chunk->is_empty(), "Not ready for reuse"); |
coleenp@4037 | 2289 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2290 | gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
coleenp@4037 | 2291 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 2292 | new_chunk->print_on(gclog_or_tty); |
stefank@5771 | 2293 | chunk_manager()->locked_print_free_chunks(gclog_or_tty); |
coleenp@4037 | 2294 | } |
coleenp@4037 | 2295 | } |
coleenp@4037 | 2296 | |
mgerdin@5699 | 2297 | void SpaceManager::retire_current_chunk() { |
mgerdin@5699 | 2298 | if (current_chunk() != NULL) { |
mgerdin@5699 | 2299 | size_t remaining_words = current_chunk()->free_word_size(); |
mgerdin@5699 | 2300 | if (remaining_words >= TreeChunk<Metablock, FreeList>::min_size()) { |
mgerdin@5699 | 2301 | block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
mgerdin@5699 | 2302 | inc_used_metrics(remaining_words); |
mgerdin@5699 | 2303 | } |
mgerdin@5699 | 2304 | } |
mgerdin@5699 | 2305 | } |
mgerdin@5699 | 2306 | |
jmasa@4382 | 2307 | Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
jmasa@4382 | 2308 | size_t grow_chunks_by_words) { |
stefank@5771 | 2309 | // Get a chunk from the chunk freelist |
stefank@5771 | 2310 | Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
stefank@5771 | 2311 | |
stefank@5771 | 2312 | if (next == NULL) { |
stefank@5771 | 2313 | next = vs_list()->get_new_chunk(word_size, |
stefank@5771 | 2314 | grow_chunks_by_words, |
stefank@5771 | 2315 | medium_chunk_bunch()); |
stefank@5771 | 2316 | } |
jmasa@4382 | 2317 | |
stefank@5707 | 2318 | if (TraceMetadataHumongousAllocation && next != NULL && |
jmasa@4382 | 2319 | SpaceManager::is_humongous(next->word_size())) { |
stefank@5707 | 2320 | gclog_or_tty->print_cr(" new humongous chunk word size " |
stefank@5707 | 2321 | PTR_FORMAT, next->word_size()); |
jmasa@4382 | 2322 | } |
jmasa@4382 | 2323 | |
jmasa@4382 | 2324 | return next; |
jmasa@4382 | 2325 | } |
jmasa@4382 | 2326 | |
coleenp@4037 | 2327 | MetaWord* SpaceManager::allocate(size_t word_size) { |
coleenp@4037 | 2328 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2329 | |
iklam@5208 | 2330 | size_t raw_word_size = get_raw_word_size(word_size); |
coleenp@4037 | 2331 | BlockFreelist* fl = block_freelists(); |
jmasa@4196 | 2332 | MetaWord* p = NULL; |
coleenp@4037 | 2333 | // Allocation from the dictionary is expensive in the sense that |
coleenp@4037 | 2334 | // the dictionary has to be searched for a size. Don't allocate |
coleenp@4037 | 2335 | // from the dictionary until it starts to get fat. Is this |
coleenp@4037 | 2336 | // a reasonable policy? Maybe an skinny dictionary is fast enough |
coleenp@4037 | 2337 | // for allocations. Do some profiling. JJJ |
jmasa@4196 | 2338 | if (fl->total_size() > allocation_from_dictionary_limit) { |
jmasa@4196 | 2339 | p = fl->get_block(raw_word_size); |
coleenp@4037 | 2340 | } |
jmasa@4196 | 2341 | if (p == NULL) { |
jmasa@4196 | 2342 | p = allocate_work(raw_word_size); |
coleenp@4037 | 2343 | } |
coleenp@4037 | 2344 | Metadebug::deallocate_block_a_lot(this, raw_word_size); |
coleenp@4037 | 2345 | |
jmasa@4196 | 2346 | return p; |
coleenp@4037 | 2347 | } |
coleenp@4037 | 2348 | |
coleenp@4037 | 2349 | // Returns the address of spaced allocated for "word_size". |
coleenp@4037 | 2350 | // This methods does not know about blocks (Metablocks) |
jmasa@4196 | 2351 | MetaWord* SpaceManager::allocate_work(size_t word_size) { |
coleenp@4037 | 2352 | assert_lock_strong(_lock); |
coleenp@4037 | 2353 | #ifdef ASSERT |
coleenp@4037 | 2354 | if (Metadebug::test_metadata_failure()) { |
coleenp@4037 | 2355 | return NULL; |
coleenp@4037 | 2356 | } |
coleenp@4037 | 2357 | #endif |
coleenp@4037 | 2358 | // Is there space in the current chunk? |
jmasa@4196 | 2359 | MetaWord* result = NULL; |
coleenp@4037 | 2360 | |
coleenp@4037 | 2361 | // For DumpSharedSpaces, only allocate out of the current chunk which is |
coleenp@4037 | 2362 | // never null because we gave it the size we wanted. Caller reports out |
coleenp@4037 | 2363 | // of memory if this returns null. |
coleenp@4037 | 2364 | if (DumpSharedSpaces) { |
coleenp@4037 | 2365 | assert(current_chunk() != NULL, "should never happen"); |
jmasa@5015 | 2366 | inc_used_metrics(word_size); |
coleenp@4037 | 2367 | return current_chunk()->allocate(word_size); // caller handles null result |
coleenp@4037 | 2368 | } |
coleenp@4037 | 2369 | if (current_chunk() != NULL) { |
coleenp@4037 | 2370 | result = current_chunk()->allocate(word_size); |
coleenp@4037 | 2371 | } |
coleenp@4037 | 2372 | |
coleenp@4037 | 2373 | if (result == NULL) { |
coleenp@4037 | 2374 | result = grow_and_allocate(word_size); |
coleenp@4037 | 2375 | } |
hseigel@5528 | 2376 | if (result != 0) { |
jmasa@5015 | 2377 | inc_used_metrics(word_size); |
jmasa@4196 | 2378 | assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
jmasa@4196 | 2379 | "Head of the list is being allocated"); |
coleenp@4037 | 2380 | } |
coleenp@4037 | 2381 | |
coleenp@4037 | 2382 | return result; |
coleenp@4037 | 2383 | } |
coleenp@4037 | 2384 | |
coleenp@4037 | 2385 | void SpaceManager::verify() { |
coleenp@4037 | 2386 | // If there are blocks in the dictionary, then |
coleenp@4037 | 2387 | // verfication of chunks does not work since |
coleenp@4037 | 2388 | // being in the dictionary alters a chunk. |
jmasa@4196 | 2389 | if (block_freelists()->total_size() == 0) { |
jmasa@4382 | 2390 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 2391 | Metachunk* curr = chunks_in_use(i); |
coleenp@4037 | 2392 | while (curr != NULL) { |
coleenp@4037 | 2393 | curr->verify(); |
jmasa@4327 | 2394 | verify_chunk_size(curr); |
coleenp@4037 | 2395 | curr = curr->next(); |
coleenp@4037 | 2396 | } |
coleenp@4037 | 2397 | } |
coleenp@4037 | 2398 | } |
coleenp@4037 | 2399 | } |
coleenp@4037 | 2400 | |
jmasa@4327 | 2401 | void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
jmasa@4327 | 2402 | assert(is_humongous(chunk->word_size()) || |
jmasa@4382 | 2403 | chunk->word_size() == medium_chunk_size() || |
jmasa@4382 | 2404 | chunk->word_size() == small_chunk_size() || |
jmasa@4382 | 2405 | chunk->word_size() == specialized_chunk_size(), |
jmasa@4327 | 2406 | "Chunk size is wrong"); |
jmasa@4327 | 2407 | return; |
jmasa@4327 | 2408 | } |
jmasa@4327 | 2409 | |
coleenp@4037 | 2410 | #ifdef ASSERT |
jmasa@5015 | 2411 | void SpaceManager::verify_allocated_blocks_words() { |
coleenp@4037 | 2412 | // Verification is only guaranteed at a safepoint. |
jmasa@5015 | 2413 | assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
jmasa@5015 | 2414 | "Verification can fail if the applications is running"); |
jmasa@5015 | 2415 | assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
mikael@4548 | 2416 | err_msg("allocation total is not consistent " SIZE_FORMAT |
mikael@4548 | 2417 | " vs " SIZE_FORMAT, |
jmasa@5015 | 2418 | allocated_blocks_words(), sum_used_in_chunks_in_use())); |
coleenp@4037 | 2419 | } |
coleenp@4037 | 2420 | |
coleenp@4037 | 2421 | #endif |
coleenp@4037 | 2422 | |
coleenp@4037 | 2423 | void SpaceManager::dump(outputStream* const out) const { |
coleenp@4037 | 2424 | size_t curr_total = 0; |
coleenp@4037 | 2425 | size_t waste = 0; |
coleenp@4037 | 2426 | uint i = 0; |
coleenp@4037 | 2427 | size_t used = 0; |
coleenp@4037 | 2428 | size_t capacity = 0; |
coleenp@4037 | 2429 | |
coleenp@4037 | 2430 | // Add up statistics for all chunks in this SpaceManager. |
jmasa@4382 | 2431 | for (ChunkIndex index = ZeroIndex; |
jmasa@4196 | 2432 | index < NumberOfInUseLists; |
coleenp@4037 | 2433 | index = next_chunk_index(index)) { |
coleenp@4037 | 2434 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2435 | curr != NULL; |
coleenp@4037 | 2436 | curr = curr->next()) { |
coleenp@4037 | 2437 | out->print("%d) ", i++); |
coleenp@4037 | 2438 | curr->print_on(out); |
coleenp@4037 | 2439 | curr_total += curr->word_size(); |
coleenp@4037 | 2440 | used += curr->used_word_size(); |
coleenp@4037 | 2441 | capacity += curr->capacity_word_size(); |
coleenp@4037 | 2442 | waste += curr->free_word_size() + curr->overhead();; |
coleenp@4037 | 2443 | } |
coleenp@4037 | 2444 | } |
coleenp@4037 | 2445 | |
stefank@5707 | 2446 | if (TraceMetadataChunkAllocation && Verbose) { |
stefank@5707 | 2447 | block_freelists()->print_on(out); |
stefank@5707 | 2448 | } |
stefank@5707 | 2449 | |
jmasa@4382 | 2450 | size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
coleenp@4037 | 2451 | // Free space isn't wasted. |
coleenp@4037 | 2452 | waste -= free; |
coleenp@4037 | 2453 | |
coleenp@4037 | 2454 | out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
coleenp@4037 | 2455 | " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
coleenp@4037 | 2456 | " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
coleenp@4037 | 2457 | } |
coleenp@4037 | 2458 | |
coleenp@4304 | 2459 | #ifndef PRODUCT |
coleenp@4037 | 2460 | void SpaceManager::mangle_freed_chunks() { |
jmasa@4382 | 2461 | for (ChunkIndex index = ZeroIndex; |
jmasa@4196 | 2462 | index < NumberOfInUseLists; |
coleenp@4037 | 2463 | index = next_chunk_index(index)) { |
coleenp@4037 | 2464 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2465 | curr != NULL; |
coleenp@4037 | 2466 | curr = curr->next()) { |
coleenp@4037 | 2467 | curr->mangle(); |
coleenp@4037 | 2468 | } |
coleenp@4037 | 2469 | } |
coleenp@4037 | 2470 | } |
coleenp@4304 | 2471 | #endif // PRODUCT |
coleenp@4037 | 2472 | |
coleenp@4037 | 2473 | // MetaspaceAux |
coleenp@4037 | 2474 | |
jmasa@5015 | 2475 | |
jmasa@5162 | 2476 | size_t MetaspaceAux::_allocated_capacity_words[] = {0, 0}; |
jmasa@5162 | 2477 | size_t MetaspaceAux::_allocated_used_words[] = {0, 0}; |
jmasa@5015 | 2478 | |
ehelin@5531 | 2479 | size_t MetaspaceAux::free_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5531 | 2480 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
ehelin@5531 | 2481 | return list == NULL ? 0 : list->free_bytes(); |
ehelin@5531 | 2482 | } |
ehelin@5531 | 2483 | |
jmasa@5015 | 2484 | size_t MetaspaceAux::free_bytes() { |
ehelin@5531 | 2485 | return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
jmasa@5015 | 2486 | } |
jmasa@5015 | 2487 | |
jmasa@5162 | 2488 | void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5015 | 2489 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5162 | 2490 | assert(words <= allocated_capacity_words(mdtype), |
jmasa@5015 | 2491 | err_msg("About to decrement below 0: words " SIZE_FORMAT |
jmasa@5162 | 2492 | " is greater than _allocated_capacity_words[%u] " SIZE_FORMAT, |
jmasa@5162 | 2493 | words, mdtype, allocated_capacity_words(mdtype))); |
jmasa@5162 | 2494 | _allocated_capacity_words[mdtype] -= words; |
jmasa@5015 | 2495 | } |
jmasa@5015 | 2496 | |
jmasa@5162 | 2497 | void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5015 | 2498 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5015 | 2499 | // Needs to be atomic |
jmasa@5162 | 2500 | _allocated_capacity_words[mdtype] += words; |
jmasa@5015 | 2501 | } |
jmasa@5015 | 2502 | |
jmasa@5162 | 2503 | void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5162 | 2504 | assert(words <= allocated_used_words(mdtype), |
jmasa@5015 | 2505 | err_msg("About to decrement below 0: words " SIZE_FORMAT |
jmasa@5162 | 2506 | " is greater than _allocated_used_words[%u] " SIZE_FORMAT, |
jmasa@5162 | 2507 | words, mdtype, allocated_used_words(mdtype))); |
jmasa@5015 | 2508 | // For CMS deallocation of the Metaspaces occurs during the |
jmasa@5015 | 2509 | // sweep which is a concurrent phase. Protection by the expand_lock() |
jmasa@5015 | 2510 | // is not enough since allocation is on a per Metaspace basis |
jmasa@5015 | 2511 | // and protected by the Metaspace lock. |
jmasa@5015 | 2512 | jlong minus_words = (jlong) - (jlong) words; |
jmasa@5162 | 2513 | Atomic::add_ptr(minus_words, &_allocated_used_words[mdtype]); |
jmasa@5015 | 2514 | } |
jmasa@5015 | 2515 | |
jmasa@5162 | 2516 | void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5015 | 2517 | // _allocated_used_words tracks allocations for |
jmasa@5015 | 2518 | // each piece of metadata. Those allocations are |
jmasa@5015 | 2519 | // generally done concurrently by different application |
jmasa@5015 | 2520 | // threads so must be done atomically. |
jmasa@5162 | 2521 | Atomic::add_ptr(words, &_allocated_used_words[mdtype]); |
jmasa@5015 | 2522 | } |
jmasa@5015 | 2523 | |
jmasa@5015 | 2524 | size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
jmasa@4042 | 2525 | size_t used = 0; |
jmasa@4042 | 2526 | ClassLoaderDataGraphMetaspaceIterator iter; |
jmasa@4042 | 2527 | while (iter.repeat()) { |
jmasa@4042 | 2528 | Metaspace* msp = iter.get_next(); |
jmasa@5015 | 2529 | // Sum allocated_blocks_words for each metaspace |
jmasa@4042 | 2530 | if (msp != NULL) { |
jmasa@5015 | 2531 | used += msp->used_words_slow(mdtype); |
jmasa@4042 | 2532 | } |
jmasa@4042 | 2533 | } |
jmasa@4042 | 2534 | return used * BytesPerWord; |
jmasa@4042 | 2535 | } |
jmasa@4042 | 2536 | |
ehelin@5703 | 2537 | size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2538 | size_t free = 0; |
coleenp@4037 | 2539 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2540 | while (iter.repeat()) { |
coleenp@4037 | 2541 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2542 | if (msp != NULL) { |
ehelin@5703 | 2543 | free += msp->free_words_slow(mdtype); |
coleenp@4037 | 2544 | } |
coleenp@4037 | 2545 | } |
coleenp@4037 | 2546 | return free * BytesPerWord; |
coleenp@4037 | 2547 | } |
coleenp@4037 | 2548 | |
jmasa@5015 | 2549 | size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
hseigel@5528 | 2550 | if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
hseigel@5528 | 2551 | return 0; |
hseigel@5528 | 2552 | } |
jmasa@5015 | 2553 | // Don't count the space in the freelists. That space will be |
jmasa@5015 | 2554 | // added to the capacity calculation as needed. |
jmasa@5015 | 2555 | size_t capacity = 0; |
coleenp@4037 | 2556 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2557 | while (iter.repeat()) { |
coleenp@4037 | 2558 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2559 | if (msp != NULL) { |
jmasa@5015 | 2560 | capacity += msp->capacity_words_slow(mdtype); |
coleenp@4037 | 2561 | } |
coleenp@4037 | 2562 | } |
coleenp@4037 | 2563 | return capacity * BytesPerWord; |
coleenp@4037 | 2564 | } |
coleenp@4037 | 2565 | |
ehelin@5703 | 2566 | size_t MetaspaceAux::capacity_bytes_slow() { |
ehelin@5703 | 2567 | #ifdef PRODUCT |
ehelin@5703 | 2568 | // Use allocated_capacity_bytes() in PRODUCT instead of this function. |
ehelin@5703 | 2569 | guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); |
ehelin@5703 | 2570 | #endif |
ehelin@5703 | 2571 | size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); |
ehelin@5703 | 2572 | size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); |
ehelin@5703 | 2573 | assert(allocated_capacity_bytes() == class_capacity + non_class_capacity, |
ehelin@5703 | 2574 | err_msg("bad accounting: allocated_capacity_bytes() " SIZE_FORMAT |
ehelin@5703 | 2575 | " class_capacity + non_class_capacity " SIZE_FORMAT |
ehelin@5703 | 2576 | " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, |
ehelin@5703 | 2577 | allocated_capacity_bytes(), class_capacity + non_class_capacity, |
ehelin@5703 | 2578 | class_capacity, non_class_capacity)); |
ehelin@5703 | 2579 | |
ehelin@5703 | 2580 | return class_capacity + non_class_capacity; |
ehelin@5703 | 2581 | } |
ehelin@5703 | 2582 | |
ehelin@5703 | 2583 | size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5531 | 2584 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
stefank@5704 | 2585 | return list == NULL ? 0 : list->reserved_bytes(); |
stefank@5704 | 2586 | } |
stefank@5704 | 2587 | |
stefank@5704 | 2588 | size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
stefank@5704 | 2589 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
stefank@5704 | 2590 | return list == NULL ? 0 : list->committed_bytes(); |
coleenp@4037 | 2591 | } |
coleenp@4037 | 2592 | |
ehelin@5703 | 2593 | size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } |
ehelin@5703 | 2594 | |
ehelin@5703 | 2595 | size_t MetaspaceAux::free_chunks_total_words(Metaspace::MetadataType mdtype) { |
stefank@5771 | 2596 | ChunkManager* chunk_manager = Metaspace::get_chunk_manager(mdtype); |
stefank@5771 | 2597 | if (chunk_manager == NULL) { |
hseigel@5528 | 2598 | return 0; |
hseigel@5528 | 2599 | } |
stefank@5771 | 2600 | chunk_manager->slow_verify(); |
stefank@5771 | 2601 | return chunk_manager->free_chunks_total_words(); |
coleenp@4037 | 2602 | } |
coleenp@4037 | 2603 | |
ehelin@5703 | 2604 | size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5703 | 2605 | return free_chunks_total_words(mdtype) * BytesPerWord; |
coleenp@4037 | 2606 | } |
coleenp@4037 | 2607 | |
ehelin@5703 | 2608 | size_t MetaspaceAux::free_chunks_total_words() { |
ehelin@5703 | 2609 | return free_chunks_total_words(Metaspace::ClassType) + |
ehelin@5703 | 2610 | free_chunks_total_words(Metaspace::NonClassType); |
jmasa@5015 | 2611 | } |
jmasa@5015 | 2612 | |
ehelin@5703 | 2613 | size_t MetaspaceAux::free_chunks_total_bytes() { |
ehelin@5703 | 2614 | return free_chunks_total_words() * BytesPerWord; |
jmasa@5015 | 2615 | } |
jmasa@5015 | 2616 | |
coleenp@4037 | 2617 | void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
coleenp@4037 | 2618 | gclog_or_tty->print(", [Metaspace:"); |
coleenp@4037 | 2619 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 2620 | gclog_or_tty->print(" " SIZE_FORMAT |
coleenp@4037 | 2621 | "->" SIZE_FORMAT |
jmasa@5015 | 2622 | "(" SIZE_FORMAT ")", |
coleenp@4037 | 2623 | prev_metadata_used, |
jmasa@5310 | 2624 | allocated_used_bytes(), |
ehelin@5703 | 2625 | reserved_bytes()); |
coleenp@4037 | 2626 | } else { |
coleenp@4037 | 2627 | gclog_or_tty->print(" " SIZE_FORMAT "K" |
coleenp@4037 | 2628 | "->" SIZE_FORMAT "K" |
jmasa@5015 | 2629 | "(" SIZE_FORMAT "K)", |
ehelin@5703 | 2630 | prev_metadata_used/K, |
ehelin@5703 | 2631 | allocated_used_bytes()/K, |
ehelin@5703 | 2632 | reserved_bytes()/K); |
coleenp@4037 | 2633 | } |
coleenp@4037 | 2634 | |
coleenp@4037 | 2635 | gclog_or_tty->print("]"); |
coleenp@4037 | 2636 | } |
coleenp@4037 | 2637 | |
coleenp@4037 | 2638 | // This is printed when PrintGCDetails |
coleenp@4037 | 2639 | void MetaspaceAux::print_on(outputStream* out) { |
coleenp@4037 | 2640 | Metaspace::MetadataType nct = Metaspace::NonClassType; |
coleenp@4037 | 2641 | |
coleenp@4037 | 2642 | out->print_cr(" Metaspace total " |
coleenp@4037 | 2643 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
coleenp@4037 | 2644 | " reserved " SIZE_FORMAT "K", |
ehelin@5703 | 2645 | allocated_capacity_bytes()/K, allocated_used_bytes()/K, reserved_bytes()/K); |
jmasa@5162 | 2646 | |
jmasa@5162 | 2647 | out->print_cr(" data space " |
jmasa@5162 | 2648 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
jmasa@5162 | 2649 | " reserved " SIZE_FORMAT "K", |
jmasa@5162 | 2650 | allocated_capacity_bytes(nct)/K, |
jmasa@5162 | 2651 | allocated_used_bytes(nct)/K, |
ehelin@5703 | 2652 | reserved_bytes(nct)/K); |
hseigel@5528 | 2653 | if (Metaspace::using_class_space()) { |
hseigel@5528 | 2654 | Metaspace::MetadataType ct = Metaspace::ClassType; |
hseigel@5528 | 2655 | out->print_cr(" class space " |
hseigel@5528 | 2656 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
hseigel@5528 | 2657 | " reserved " SIZE_FORMAT "K", |
hseigel@5528 | 2658 | allocated_capacity_bytes(ct)/K, |
hseigel@5528 | 2659 | allocated_used_bytes(ct)/K, |
ehelin@5703 | 2660 | reserved_bytes(ct)/K); |
hseigel@5528 | 2661 | } |
coleenp@4037 | 2662 | } |
coleenp@4037 | 2663 | |
coleenp@4037 | 2664 | // Print information for class space and data space separately. |
coleenp@4037 | 2665 | // This is almost the same as above. |
coleenp@4037 | 2666 | void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
ehelin@5703 | 2667 | size_t free_chunks_capacity_bytes = free_chunks_total_bytes(mdtype); |
jmasa@5015 | 2668 | size_t capacity_bytes = capacity_bytes_slow(mdtype); |
jmasa@5015 | 2669 | size_t used_bytes = used_bytes_slow(mdtype); |
ehelin@5703 | 2670 | size_t free_bytes = free_bytes_slow(mdtype); |
coleenp@4037 | 2671 | size_t used_and_free = used_bytes + free_bytes + |
coleenp@4037 | 2672 | free_chunks_capacity_bytes; |
coleenp@4037 | 2673 | out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
coleenp@4037 | 2674 | "K + unused in chunks " SIZE_FORMAT "K + " |
coleenp@4037 | 2675 | " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
coleenp@4037 | 2676 | "K capacity in allocated chunks " SIZE_FORMAT "K", |
coleenp@4037 | 2677 | used_bytes / K, |
coleenp@4037 | 2678 | free_bytes / K, |
coleenp@4037 | 2679 | free_chunks_capacity_bytes / K, |
coleenp@4037 | 2680 | used_and_free / K, |
coleenp@4037 | 2681 | capacity_bytes / K); |
mgerdin@4738 | 2682 | // Accounting can only be correct if we got the values during a safepoint |
mgerdin@4738 | 2683 | assert(!SafepointSynchronize::is_at_safepoint() || used_and_free == capacity_bytes, "Accounting is wrong"); |
coleenp@4037 | 2684 | } |
coleenp@4037 | 2685 | |
hseigel@5528 | 2686 | // Print total fragmentation for class metaspaces |
hseigel@5528 | 2687 | void MetaspaceAux::print_class_waste(outputStream* out) { |
hseigel@5528 | 2688 | assert(Metaspace::using_class_space(), "class metaspace not used"); |
hseigel@5528 | 2689 | size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0; |
hseigel@5528 | 2690 | size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_humongous_count = 0; |
hseigel@5528 | 2691 | ClassLoaderDataGraphMetaspaceIterator iter; |
hseigel@5528 | 2692 | while (iter.repeat()) { |
hseigel@5528 | 2693 | Metaspace* msp = iter.get_next(); |
hseigel@5528 | 2694 | if (msp != NULL) { |
hseigel@5528 | 2695 | cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
hseigel@5528 | 2696 | cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
hseigel@5528 | 2697 | cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
hseigel@5528 | 2698 | cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
hseigel@5528 | 2699 | cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
hseigel@5528 | 2700 | cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
hseigel@5528 | 2701 | cls_humongous_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
hseigel@5528 | 2702 | } |
hseigel@5528 | 2703 | } |
hseigel@5528 | 2704 | out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2705 | SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2706 | SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2707 | "large count " SIZE_FORMAT, |
hseigel@5528 | 2708 | cls_specialized_count, cls_specialized_waste, |
hseigel@5528 | 2709 | cls_small_count, cls_small_waste, |
hseigel@5528 | 2710 | cls_medium_count, cls_medium_waste, cls_humongous_count); |
hseigel@5528 | 2711 | } |
hseigel@5528 | 2712 | |
hseigel@5528 | 2713 | // Print total fragmentation for data and class metaspaces separately |
coleenp@4037 | 2714 | void MetaspaceAux::print_waste(outputStream* out) { |
coleenp@5337 | 2715 | size_t specialized_waste = 0, small_waste = 0, medium_waste = 0; |
coleenp@5337 | 2716 | size_t specialized_count = 0, small_count = 0, medium_count = 0, humongous_count = 0; |
coleenp@4037 | 2717 | |
coleenp@4037 | 2718 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2719 | while (iter.repeat()) { |
coleenp@4037 | 2720 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2721 | if (msp != NULL) { |
jmasa@4382 | 2722 | specialized_waste += msp->vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
jmasa@4382 | 2723 | specialized_count += msp->vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
coleenp@4037 | 2724 | small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
jmasa@4382 | 2725 | small_count += msp->vsm()->sum_count_in_chunks_in_use(SmallIndex); |
coleenp@4037 | 2726 | medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
jmasa@4382 | 2727 | medium_count += msp->vsm()->sum_count_in_chunks_in_use(MediumIndex); |
coleenp@5337 | 2728 | humongous_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
coleenp@4037 | 2729 | } |
coleenp@4037 | 2730 | } |
coleenp@4037 | 2731 | out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
jmasa@4382 | 2732 | out->print_cr(" data: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
jmasa@4382 | 2733 | SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
coleenp@5337 | 2734 | SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
coleenp@5337 | 2735 | "large count " SIZE_FORMAT, |
jmasa@4382 | 2736 | specialized_count, specialized_waste, small_count, |
coleenp@5337 | 2737 | small_waste, medium_count, medium_waste, humongous_count); |
hseigel@5528 | 2738 | if (Metaspace::using_class_space()) { |
hseigel@5528 | 2739 | print_class_waste(out); |
hseigel@5528 | 2740 | } |
coleenp@4037 | 2741 | } |
coleenp@4037 | 2742 | |
coleenp@4037 | 2743 | // Dump global metaspace things from the end of ClassLoaderDataGraph |
coleenp@4037 | 2744 | void MetaspaceAux::dump(outputStream* out) { |
coleenp@4037 | 2745 | out->print_cr("All Metaspace:"); |
coleenp@4037 | 2746 | out->print("data space: "); print_on(out, Metaspace::NonClassType); |
coleenp@4037 | 2747 | out->print("class space: "); print_on(out, Metaspace::ClassType); |
coleenp@4037 | 2748 | print_waste(out); |
coleenp@4037 | 2749 | } |
coleenp@4037 | 2750 | |
mgerdin@4264 | 2751 | void MetaspaceAux::verify_free_chunks() { |
stefank@5771 | 2752 | Metaspace::chunk_manager_metadata()->verify(); |
hseigel@5528 | 2753 | if (Metaspace::using_class_space()) { |
stefank@5771 | 2754 | Metaspace::chunk_manager_class()->verify(); |
hseigel@5528 | 2755 | } |
mgerdin@4264 | 2756 | } |
mgerdin@4264 | 2757 | |
jmasa@5015 | 2758 | void MetaspaceAux::verify_capacity() { |
jmasa@5015 | 2759 | #ifdef ASSERT |
jmasa@5015 | 2760 | size_t running_sum_capacity_bytes = allocated_capacity_bytes(); |
jmasa@5162 | 2761 | // For purposes of the running sum of capacity, verify against capacity |
jmasa@5015 | 2762 | size_t capacity_in_use_bytes = capacity_bytes_slow(); |
jmasa@5015 | 2763 | assert(running_sum_capacity_bytes == capacity_in_use_bytes, |
jmasa@5015 | 2764 | err_msg("allocated_capacity_words() * BytesPerWord " SIZE_FORMAT |
jmasa@5015 | 2765 | " capacity_bytes_slow()" SIZE_FORMAT, |
jmasa@5015 | 2766 | running_sum_capacity_bytes, capacity_in_use_bytes)); |
jmasa@5162 | 2767 | for (Metaspace::MetadataType i = Metaspace::ClassType; |
jmasa@5162 | 2768 | i < Metaspace:: MetadataTypeCount; |
jmasa@5162 | 2769 | i = (Metaspace::MetadataType)(i + 1)) { |
jmasa@5162 | 2770 | size_t capacity_in_use_bytes = capacity_bytes_slow(i); |
jmasa@5162 | 2771 | assert(allocated_capacity_bytes(i) == capacity_in_use_bytes, |
jmasa@5162 | 2772 | err_msg("allocated_capacity_bytes(%u) " SIZE_FORMAT |
jmasa@5162 | 2773 | " capacity_bytes_slow(%u)" SIZE_FORMAT, |
jmasa@5162 | 2774 | i, allocated_capacity_bytes(i), i, capacity_in_use_bytes)); |
jmasa@5162 | 2775 | } |
jmasa@5015 | 2776 | #endif |
jmasa@5015 | 2777 | } |
jmasa@5015 | 2778 | |
jmasa@5015 | 2779 | void MetaspaceAux::verify_used() { |
jmasa@5015 | 2780 | #ifdef ASSERT |
jmasa@5015 | 2781 | size_t running_sum_used_bytes = allocated_used_bytes(); |
jmasa@5162 | 2782 | // For purposes of the running sum of used, verify against used |
jmasa@5015 | 2783 | size_t used_in_use_bytes = used_bytes_slow(); |
jmasa@5015 | 2784 | assert(allocated_used_bytes() == used_in_use_bytes, |
jmasa@5015 | 2785 | err_msg("allocated_used_bytes() " SIZE_FORMAT |
jmasa@5162 | 2786 | " used_bytes_slow()" SIZE_FORMAT, |
jmasa@5015 | 2787 | allocated_used_bytes(), used_in_use_bytes)); |
jmasa@5162 | 2788 | for (Metaspace::MetadataType i = Metaspace::ClassType; |
jmasa@5162 | 2789 | i < Metaspace:: MetadataTypeCount; |
jmasa@5162 | 2790 | i = (Metaspace::MetadataType)(i + 1)) { |
jmasa@5162 | 2791 | size_t used_in_use_bytes = used_bytes_slow(i); |
jmasa@5162 | 2792 | assert(allocated_used_bytes(i) == used_in_use_bytes, |
jmasa@5162 | 2793 | err_msg("allocated_used_bytes(%u) " SIZE_FORMAT |
jmasa@5162 | 2794 | " used_bytes_slow(%u)" SIZE_FORMAT, |
jmasa@5162 | 2795 | i, allocated_used_bytes(i), i, used_in_use_bytes)); |
jmasa@5162 | 2796 | } |
jmasa@5015 | 2797 | #endif |
jmasa@5015 | 2798 | } |
jmasa@5015 | 2799 | |
jmasa@5015 | 2800 | void MetaspaceAux::verify_metrics() { |
jmasa@5015 | 2801 | verify_capacity(); |
jmasa@5015 | 2802 | verify_used(); |
jmasa@5015 | 2803 | } |
jmasa@5015 | 2804 | |
jmasa@5015 | 2805 | |
coleenp@4037 | 2806 | // Metaspace methods |
coleenp@4037 | 2807 | |
coleenp@4037 | 2808 | size_t Metaspace::_first_chunk_word_size = 0; |
jmasa@4382 | 2809 | size_t Metaspace::_first_class_chunk_word_size = 0; |
jmasa@4382 | 2810 | |
jmasa@4382 | 2811 | Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
jmasa@4382 | 2812 | initialize(lock, type); |
coleenp@4037 | 2813 | } |
coleenp@4037 | 2814 | |
coleenp@4037 | 2815 | Metaspace::~Metaspace() { |
coleenp@4037 | 2816 | delete _vsm; |
hseigel@5528 | 2817 | if (using_class_space()) { |
hseigel@5528 | 2818 | delete _class_vsm; |
hseigel@5528 | 2819 | } |
coleenp@4037 | 2820 | } |
coleenp@4037 | 2821 | |
coleenp@4037 | 2822 | VirtualSpaceList* Metaspace::_space_list = NULL; |
coleenp@4037 | 2823 | VirtualSpaceList* Metaspace::_class_space_list = NULL; |
coleenp@4037 | 2824 | |
stefank@5771 | 2825 | ChunkManager* Metaspace::_chunk_manager_metadata = NULL; |
stefank@5771 | 2826 | ChunkManager* Metaspace::_chunk_manager_class = NULL; |
stefank@5771 | 2827 | |
coleenp@4037 | 2828 | #define VIRTUALSPACEMULTIPLIER 2 |
coleenp@4037 | 2829 | |
hseigel@5528 | 2830 | #ifdef _LP64 |
hseigel@5528 | 2831 | void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
hseigel@5528 | 2832 | // Figure out the narrow_klass_base and the narrow_klass_shift. The |
hseigel@5528 | 2833 | // narrow_klass_base is the lower of the metaspace base and the cds base |
hseigel@5528 | 2834 | // (if cds is enabled). The narrow_klass_shift depends on the distance |
hseigel@5528 | 2835 | // between the lower base and higher address. |
hseigel@5528 | 2836 | address lower_base; |
hseigel@5528 | 2837 | address higher_address; |
hseigel@5528 | 2838 | if (UseSharedSpaces) { |
hseigel@5528 | 2839 | higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
hseigel@5528 | 2840 | (address)(metaspace_base + class_metaspace_size())); |
hseigel@5528 | 2841 | lower_base = MIN2(metaspace_base, cds_base); |
hseigel@5528 | 2842 | } else { |
hseigel@5528 | 2843 | higher_address = metaspace_base + class_metaspace_size(); |
hseigel@5528 | 2844 | lower_base = metaspace_base; |
hseigel@5528 | 2845 | } |
hseigel@5528 | 2846 | Universe::set_narrow_klass_base(lower_base); |
hseigel@5528 | 2847 | if ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint) { |
hseigel@5528 | 2848 | Universe::set_narrow_klass_shift(0); |
hseigel@5528 | 2849 | } else { |
hseigel@5528 | 2850 | assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
hseigel@5528 | 2851 | Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
hseigel@5528 | 2852 | } |
hseigel@5528 | 2853 | } |
hseigel@5528 | 2854 | |
hseigel@5528 | 2855 | // Return TRUE if the specified metaspace_base and cds_base are close enough |
hseigel@5528 | 2856 | // to work with compressed klass pointers. |
hseigel@5528 | 2857 | bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
hseigel@5528 | 2858 | assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
ehelin@5694 | 2859 | assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
hseigel@5528 | 2860 | address lower_base = MIN2((address)metaspace_base, cds_base); |
hseigel@5528 | 2861 | address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
hseigel@5528 | 2862 | (address)(metaspace_base + class_metaspace_size())); |
hseigel@5528 | 2863 | return ((uint64_t)(higher_address - lower_base) < (uint64_t)max_juint); |
hseigel@5528 | 2864 | } |
hseigel@5528 | 2865 | |
hseigel@5528 | 2866 | // Try to allocate the metaspace at the requested addr. |
hseigel@5528 | 2867 | void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
hseigel@5528 | 2868 | assert(using_class_space(), "called improperly"); |
ehelin@5694 | 2869 | assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
hseigel@5528 | 2870 | assert(class_metaspace_size() < KlassEncodingMetaspaceMax, |
hseigel@5528 | 2871 | "Metaspace size is too big"); |
hseigel@5528 | 2872 | |
hseigel@5528 | 2873 | ReservedSpace metaspace_rs = ReservedSpace(class_metaspace_size(), |
hseigel@5528 | 2874 | os::vm_allocation_granularity(), |
hseigel@5528 | 2875 | false, requested_addr, 0); |
hseigel@5528 | 2876 | if (!metaspace_rs.is_reserved()) { |
hseigel@5528 | 2877 | if (UseSharedSpaces) { |
hseigel@5528 | 2878 | // Keep trying to allocate the metaspace, increasing the requested_addr |
hseigel@5528 | 2879 | // by 1GB each time, until we reach an address that will no longer allow |
hseigel@5528 | 2880 | // use of CDS with compressed klass pointers. |
hseigel@5528 | 2881 | char *addr = requested_addr; |
hseigel@5528 | 2882 | while (!metaspace_rs.is_reserved() && (addr + 1*G > addr) && |
hseigel@5528 | 2883 | can_use_cds_with_metaspace_addr(addr + 1*G, cds_base)) { |
hseigel@5528 | 2884 | addr = addr + 1*G; |
hseigel@5528 | 2885 | metaspace_rs = ReservedSpace(class_metaspace_size(), |
hseigel@5528 | 2886 | os::vm_allocation_granularity(), false, addr, 0); |
hseigel@5528 | 2887 | } |
hseigel@5528 | 2888 | } |
hseigel@5528 | 2889 | |
hseigel@5528 | 2890 | // If no successful allocation then try to allocate the space anywhere. If |
hseigel@5528 | 2891 | // that fails then OOM doom. At this point we cannot try allocating the |
ehelin@5694 | 2892 | // metaspace as if UseCompressedClassPointers is off because too much |
ehelin@5694 | 2893 | // initialization has happened that depends on UseCompressedClassPointers. |
ehelin@5694 | 2894 | // So, UseCompressedClassPointers cannot be turned off at this point. |
hseigel@5528 | 2895 | if (!metaspace_rs.is_reserved()) { |
hseigel@5528 | 2896 | metaspace_rs = ReservedSpace(class_metaspace_size(), |
hseigel@5528 | 2897 | os::vm_allocation_granularity(), false); |
hseigel@5528 | 2898 | if (!metaspace_rs.is_reserved()) { |
hseigel@5528 | 2899 | vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
hseigel@5528 | 2900 | class_metaspace_size())); |
hseigel@5528 | 2901 | } |
hseigel@5528 | 2902 | } |
hseigel@5528 | 2903 | } |
hseigel@5528 | 2904 | |
hseigel@5528 | 2905 | // If we got here then the metaspace got allocated. |
hseigel@5528 | 2906 | MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
hseigel@5528 | 2907 | |
hseigel@5528 | 2908 | // Verify that we can use shared spaces. Otherwise, turn off CDS. |
hseigel@5528 | 2909 | if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
hseigel@5528 | 2910 | FileMapInfo::stop_sharing_and_unmap( |
hseigel@5528 | 2911 | "Could not allocate metaspace at a compatible address"); |
hseigel@5528 | 2912 | } |
hseigel@5528 | 2913 | |
hseigel@5528 | 2914 | set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
hseigel@5528 | 2915 | UseSharedSpaces ? (address)cds_base : 0); |
hseigel@5528 | 2916 | |
hseigel@5528 | 2917 | initialize_class_space(metaspace_rs); |
hseigel@5528 | 2918 | |
hseigel@5528 | 2919 | if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
hseigel@5528 | 2920 | gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
hseigel@5528 | 2921 | Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
hseigel@5528 | 2922 | gclog_or_tty->print_cr("Metaspace Size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
hseigel@5528 | 2923 | class_metaspace_size(), metaspace_rs.base(), requested_addr); |
hseigel@5528 | 2924 | } |
hseigel@5528 | 2925 | } |
hseigel@5528 | 2926 | |
ehelin@5694 | 2927 | // For UseCompressedClassPointers the class space is reserved above the top of |
hseigel@5528 | 2928 | // the Java heap. The argument passed in is at the base of the compressed space. |
hseigel@5528 | 2929 | void Metaspace::initialize_class_space(ReservedSpace rs) { |
hseigel@5528 | 2930 | // The reserved space size may be bigger because of alignment, esp with UseLargePages |
ehelin@5694 | 2931 | assert(rs.size() >= CompressedClassSpaceSize, |
ehelin@5694 | 2932 | err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
hseigel@5528 | 2933 | assert(using_class_space(), "Must be using class space"); |
hseigel@5528 | 2934 | _class_space_list = new VirtualSpaceList(rs); |
stefank@5771 | 2935 | _chunk_manager_class = new ChunkManager(SpecializedChunk, ClassSmallChunk, ClassMediumChunk); |
hseigel@5528 | 2936 | } |
hseigel@5528 | 2937 | |
hseigel@5528 | 2938 | #endif |
hseigel@5528 | 2939 | |
coleenp@4037 | 2940 | void Metaspace::global_initialize() { |
coleenp@4037 | 2941 | // Initialize the alignment for shared spaces. |
coleenp@4037 | 2942 | int max_alignment = os::vm_page_size(); |
hseigel@5528 | 2943 | size_t cds_total = 0; |
hseigel@5528 | 2944 | |
ehelin@5694 | 2945 | set_class_metaspace_size(align_size_up(CompressedClassSpaceSize, |
hseigel@5528 | 2946 | os::vm_allocation_granularity())); |
hseigel@5528 | 2947 | |
coleenp@4037 | 2948 | MetaspaceShared::set_max_alignment(max_alignment); |
coleenp@4037 | 2949 | |
coleenp@4037 | 2950 | if (DumpSharedSpaces) { |
coleenp@4037 | 2951 | SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
coleenp@4037 | 2952 | SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
coleenp@4037 | 2953 | SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
coleenp@4037 | 2954 | SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
coleenp@4037 | 2955 | |
coleenp@4037 | 2956 | // Initialize with the sum of the shared space sizes. The read-only |
coleenp@4037 | 2957 | // and read write metaspace chunks will be allocated out of this and the |
coleenp@4037 | 2958 | // remainder is the misc code and data chunks. |
hseigel@5528 | 2959 | cds_total = FileMapInfo::shared_spaces_size(); |
hseigel@5528 | 2960 | _space_list = new VirtualSpaceList(cds_total/wordSize); |
stefank@5771 | 2961 | _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
hseigel@5528 | 2962 | |
hseigel@5528 | 2963 | #ifdef _LP64 |
hseigel@5528 | 2964 | // Set the compressed klass pointer base so that decoding of these pointers works |
hseigel@5528 | 2965 | // properly when creating the shared archive. |
ehelin@5694 | 2966 | assert(UseCompressedOops && UseCompressedClassPointers, |
ehelin@5694 | 2967 | "UseCompressedOops and UseCompressedClassPointers must be set"); |
hseigel@5528 | 2968 | Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
hseigel@5528 | 2969 | if (TraceMetavirtualspaceAllocation && Verbose) { |
hseigel@5528 | 2970 | gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
hseigel@5528 | 2971 | _space_list->current_virtual_space()->bottom()); |
hseigel@5528 | 2972 | } |
hseigel@5528 | 2973 | |
hseigel@5528 | 2974 | // Set the shift to zero. |
hseigel@5528 | 2975 | assert(class_metaspace_size() < (uint64_t)(max_juint) - cds_total, |
hseigel@5528 | 2976 | "CDS region is too large"); |
hseigel@5528 | 2977 | Universe::set_narrow_klass_shift(0); |
hseigel@5528 | 2978 | #endif |
hseigel@5528 | 2979 | |
coleenp@4037 | 2980 | } else { |
coleenp@4037 | 2981 | // If using shared space, open the file that contains the shared space |
coleenp@4037 | 2982 | // and map in the memory before initializing the rest of metaspace (so |
coleenp@4037 | 2983 | // the addresses don't conflict) |
hseigel@5528 | 2984 | address cds_address = NULL; |
coleenp@4037 | 2985 | if (UseSharedSpaces) { |
coleenp@4037 | 2986 | FileMapInfo* mapinfo = new FileMapInfo(); |
coleenp@4037 | 2987 | memset(mapinfo, 0, sizeof(FileMapInfo)); |
coleenp@4037 | 2988 | |
coleenp@4037 | 2989 | // Open the shared archive file, read and validate the header. If |
coleenp@4037 | 2990 | // initialization fails, shared spaces [UseSharedSpaces] are |
coleenp@4037 | 2991 | // disabled and the file is closed. |
coleenp@4037 | 2992 | // Map in spaces now also |
coleenp@4037 | 2993 | if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
coleenp@4037 | 2994 | FileMapInfo::set_current_info(mapinfo); |
coleenp@4037 | 2995 | } else { |
coleenp@4037 | 2996 | assert(!mapinfo->is_open() && !UseSharedSpaces, |
coleenp@4037 | 2997 | "archive file not closed or shared spaces not disabled."); |
coleenp@4037 | 2998 | } |
hseigel@5528 | 2999 | cds_total = FileMapInfo::shared_spaces_size(); |
hseigel@5528 | 3000 | cds_address = (address)mapinfo->region_base(0); |
coleenp@4037 | 3001 | } |
coleenp@4037 | 3002 | |
hseigel@5528 | 3003 | #ifdef _LP64 |
ehelin@5694 | 3004 | // If UseCompressedClassPointers is set then allocate the metaspace area |
hseigel@5528 | 3005 | // above the heap and above the CDS area (if it exists). |
hseigel@5528 | 3006 | if (using_class_space()) { |
hseigel@5528 | 3007 | if (UseSharedSpaces) { |
hseigel@5528 | 3008 | allocate_metaspace_compressed_klass_ptrs((char *)(cds_address + cds_total), cds_address); |
hseigel@5528 | 3009 | } else { |
hseigel@5528 | 3010 | allocate_metaspace_compressed_klass_ptrs((char *)CompressedKlassPointersBase, 0); |
hseigel@5528 | 3011 | } |
hseigel@5528 | 3012 | } |
hseigel@5528 | 3013 | #endif |
hseigel@5528 | 3014 | |
jmasa@4382 | 3015 | // Initialize these before initializing the VirtualSpaceList |
coleenp@4037 | 3016 | _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
jmasa@4382 | 3017 | _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
jmasa@4382 | 3018 | // Make the first class chunk bigger than a medium chunk so it's not put |
jmasa@4382 | 3019 | // on the medium chunk list. The next chunk will be small and progress |
jmasa@4382 | 3020 | // from there. This size calculated by -version. |
jmasa@4382 | 3021 | _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
ehelin@5694 | 3022 | (CompressedClassSpaceSize/BytesPerWord)*2); |
jmasa@4382 | 3023 | _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
coleenp@4037 | 3024 | // Arbitrarily set the initial virtual space to a multiple |
coleenp@4037 | 3025 | // of the boot class loader size. |
jmasa@4382 | 3026 | size_t word_size = VIRTUALSPACEMULTIPLIER * first_chunk_word_size(); |
coleenp@4037 | 3027 | // Initialize the list of virtual spaces. |
coleenp@4037 | 3028 | _space_list = new VirtualSpaceList(word_size); |
stefank@5771 | 3029 | _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
coleenp@4037 | 3030 | } |
coleenp@4037 | 3031 | } |
coleenp@4037 | 3032 | |
stefank@5771 | 3033 | Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype, |
stefank@5771 | 3034 | size_t chunk_word_size, |
stefank@5771 | 3035 | size_t chunk_bunch) { |
stefank@5771 | 3036 | // Get a chunk from the chunk freelist |
stefank@5771 | 3037 | Metachunk* chunk = get_chunk_manager(mdtype)->chunk_freelist_allocate(chunk_word_size); |
stefank@5771 | 3038 | if (chunk != NULL) { |
stefank@5771 | 3039 | return chunk; |
stefank@5771 | 3040 | } |
stefank@5771 | 3041 | |
stefank@5771 | 3042 | return get_space_list(mdtype)->get_initialization_chunk(chunk_word_size, chunk_bunch); |
stefank@5771 | 3043 | } |
stefank@5771 | 3044 | |
hseigel@5528 | 3045 | void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
coleenp@4037 | 3046 | |
coleenp@4037 | 3047 | assert(space_list() != NULL, |
coleenp@4037 | 3048 | "Metadata VirtualSpaceList has not been initialized"); |
stefank@5771 | 3049 | assert(chunk_manager_metadata() != NULL, |
stefank@5771 | 3050 | "Metadata ChunkManager has not been initialized"); |
stefank@5771 | 3051 | |
stefank@5771 | 3052 | _vsm = new SpaceManager(NonClassType, lock); |
coleenp@4037 | 3053 | if (_vsm == NULL) { |
coleenp@4037 | 3054 | return; |
coleenp@4037 | 3055 | } |
jmasa@4382 | 3056 | size_t word_size; |
jmasa@4382 | 3057 | size_t class_word_size; |
hseigel@5528 | 3058 | vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
hseigel@5528 | 3059 | |
hseigel@5528 | 3060 | if (using_class_space()) { |
stefank@5771 | 3061 | assert(class_space_list() != NULL, |
stefank@5771 | 3062 | "Class VirtualSpaceList has not been initialized"); |
stefank@5771 | 3063 | assert(chunk_manager_class() != NULL, |
stefank@5771 | 3064 | "Class ChunkManager has not been initialized"); |
hseigel@5528 | 3065 | |
hseigel@5528 | 3066 | // Allocate SpaceManager for classes. |
stefank@5771 | 3067 | _class_vsm = new SpaceManager(ClassType, lock); |
hseigel@5528 | 3068 | if (_class_vsm == NULL) { |
hseigel@5528 | 3069 | return; |
hseigel@5528 | 3070 | } |
coleenp@4037 | 3071 | } |
coleenp@4037 | 3072 | |
coleenp@4037 | 3073 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 3074 | |
coleenp@4037 | 3075 | // Allocate chunk for metadata objects |
stefank@5771 | 3076 | Metachunk* new_chunk = get_initialization_chunk(NonClassType, |
stefank@5771 | 3077 | word_size, |
stefank@5771 | 3078 | vsm()->medium_chunk_bunch()); |
coleenp@4037 | 3079 | assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
coleenp@4037 | 3080 | if (new_chunk != NULL) { |
coleenp@4037 | 3081 | // Add to this manager's list of chunks in use and current_chunk(). |
coleenp@4037 | 3082 | vsm()->add_chunk(new_chunk, true); |
coleenp@4037 | 3083 | } |
coleenp@4037 | 3084 | |
coleenp@4037 | 3085 | // Allocate chunk for class metadata objects |
hseigel@5528 | 3086 | if (using_class_space()) { |
stefank@5771 | 3087 | Metachunk* class_chunk = get_initialization_chunk(ClassType, |
stefank@5771 | 3088 | class_word_size, |
stefank@5771 | 3089 | class_vsm()->medium_chunk_bunch()); |
hseigel@5528 | 3090 | if (class_chunk != NULL) { |
hseigel@5528 | 3091 | class_vsm()->add_chunk(class_chunk, true); |
hseigel@5528 | 3092 | } |
coleenp@4037 | 3093 | } |
iklam@5208 | 3094 | |
iklam@5208 | 3095 | _alloc_record_head = NULL; |
iklam@5208 | 3096 | _alloc_record_tail = NULL; |
coleenp@4037 | 3097 | } |
coleenp@4037 | 3098 | |
jmasa@4382 | 3099 | size_t Metaspace::align_word_size_up(size_t word_size) { |
jmasa@4382 | 3100 | size_t byte_size = word_size * wordSize; |
jmasa@4382 | 3101 | return ReservedSpace::allocation_align_size_up(byte_size) / wordSize; |
jmasa@4382 | 3102 | } |
jmasa@4382 | 3103 | |
coleenp@4037 | 3104 | MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
coleenp@4037 | 3105 | // DumpSharedSpaces doesn't use class metadata area (yet) |
ehelin@5694 | 3106 | // Also, don't use class_vsm() unless UseCompressedClassPointers is true. |
hseigel@5528 | 3107 | if (mdtype == ClassType && using_class_space()) { |
jmasa@4196 | 3108 | return class_vsm()->allocate(word_size); |
coleenp@4037 | 3109 | } else { |
jmasa@4196 | 3110 | return vsm()->allocate(word_size); |
coleenp@4037 | 3111 | } |
coleenp@4037 | 3112 | } |
coleenp@4037 | 3113 | |
jmasa@4064 | 3114 | MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
jmasa@4064 | 3115 | MetaWord* result; |
jmasa@4064 | 3116 | MetaspaceGC::set_expand_after_GC(true); |
jmasa@4064 | 3117 | size_t before_inc = MetaspaceGC::capacity_until_GC(); |
jmasa@5015 | 3118 | size_t delta_bytes = MetaspaceGC::delta_capacity_until_GC(word_size) * BytesPerWord; |
jmasa@5015 | 3119 | MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
jmasa@4064 | 3120 | if (PrintGCDetails && Verbose) { |
jmasa@4064 | 3121 | gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
jmasa@4064 | 3122 | " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
jmasa@4064 | 3123 | } |
jmasa@4196 | 3124 | |
jmasa@4064 | 3125 | result = allocate(word_size, mdtype); |
jmasa@4064 | 3126 | |
jmasa@4064 | 3127 | return result; |
jmasa@4064 | 3128 | } |
jmasa@4064 | 3129 | |
coleenp@4037 | 3130 | // Space allocated in the Metaspace. This may |
coleenp@4037 | 3131 | // be across several metadata virtual spaces. |
coleenp@4037 | 3132 | char* Metaspace::bottom() const { |
coleenp@4037 | 3133 | assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
coleenp@4037 | 3134 | return (char*)vsm()->current_chunk()->bottom(); |
coleenp@4037 | 3135 | } |
coleenp@4037 | 3136 | |
jmasa@5015 | 3137 | size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3138 | if (mdtype == ClassType) { |
hseigel@5528 | 3139 | return using_class_space() ? class_vsm()->sum_used_in_chunks_in_use() : 0; |
hseigel@5528 | 3140 | } else { |
hseigel@5528 | 3141 | return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
hseigel@5528 | 3142 | } |
coleenp@4037 | 3143 | } |
coleenp@4037 | 3144 | |
ehelin@5703 | 3145 | size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3146 | if (mdtype == ClassType) { |
hseigel@5528 | 3147 | return using_class_space() ? class_vsm()->sum_free_in_chunks_in_use() : 0; |
hseigel@5528 | 3148 | } else { |
hseigel@5528 | 3149 | return vsm()->sum_free_in_chunks_in_use(); |
hseigel@5528 | 3150 | } |
coleenp@4037 | 3151 | } |
coleenp@4037 | 3152 | |
coleenp@4037 | 3153 | // Space capacity in the Metaspace. It includes |
coleenp@4037 | 3154 | // space in the list of chunks from which allocations |
coleenp@4037 | 3155 | // have been made. Don't include space in the global freelist and |
coleenp@4037 | 3156 | // in the space available in the dictionary which |
coleenp@4037 | 3157 | // is already counted in some chunk. |
jmasa@5015 | 3158 | size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3159 | if (mdtype == ClassType) { |
hseigel@5528 | 3160 | return using_class_space() ? class_vsm()->sum_capacity_in_chunks_in_use() : 0; |
hseigel@5528 | 3161 | } else { |
hseigel@5528 | 3162 | return vsm()->sum_capacity_in_chunks_in_use(); |
hseigel@5528 | 3163 | } |
coleenp@4037 | 3164 | } |
coleenp@4037 | 3165 | |
jmasa@5015 | 3166 | size_t Metaspace::used_bytes_slow(MetadataType mdtype) const { |
jmasa@5015 | 3167 | return used_words_slow(mdtype) * BytesPerWord; |
jmasa@5015 | 3168 | } |
jmasa@5015 | 3169 | |
jmasa@5015 | 3170 | size_t Metaspace::capacity_bytes_slow(MetadataType mdtype) const { |
jmasa@5015 | 3171 | return capacity_words_slow(mdtype) * BytesPerWord; |
jmasa@5015 | 3172 | } |
jmasa@5015 | 3173 | |
coleenp@4037 | 3174 | void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
coleenp@4037 | 3175 | if (SafepointSynchronize::is_at_safepoint()) { |
coleenp@4037 | 3176 | assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
jmasa@4196 | 3177 | // Don't take Heap_lock |
mgerdin@5023 | 3178 | MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
jmasa@4196 | 3179 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 3180 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 3181 | #ifdef ASSERT |
jmasa@4196 | 3182 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 3183 | #endif |
jmasa@4196 | 3184 | return; |
jmasa@4196 | 3185 | } |
hseigel@5528 | 3186 | if (is_class && using_class_space()) { |
hseigel@5528 | 3187 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3188 | } else { |
jmasa@4196 | 3189 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3190 | } |
coleenp@4037 | 3191 | } else { |
mgerdin@5023 | 3192 | MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 3193 | |
jmasa@4196 | 3194 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 3195 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 3196 | #ifdef ASSERT |
jmasa@4196 | 3197 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 3198 | #endif |
jmasa@4196 | 3199 | return; |
jmasa@4196 | 3200 | } |
hseigel@5528 | 3201 | if (is_class && using_class_space()) { |
jmasa@4196 | 3202 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3203 | } else { |
jmasa@4196 | 3204 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3205 | } |
coleenp@4037 | 3206 | } |
coleenp@4037 | 3207 | } |
coleenp@4037 | 3208 | |
jmasa@4196 | 3209 | Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
iklam@5208 | 3210 | bool read_only, MetaspaceObj::Type type, TRAPS) { |
coleenp@4037 | 3211 | if (HAS_PENDING_EXCEPTION) { |
coleenp@4037 | 3212 | assert(false, "Should not allocate with exception pending"); |
coleenp@4037 | 3213 | return NULL; // caller does a CHECK_NULL too |
coleenp@4037 | 3214 | } |
coleenp@4037 | 3215 | |
iklam@5208 | 3216 | MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
iklam@5208 | 3217 | |
coleenp@4037 | 3218 | // SSS: Should we align the allocations and make sure the sizes are aligned. |
coleenp@4037 | 3219 | MetaWord* result = NULL; |
coleenp@4037 | 3220 | |
coleenp@4037 | 3221 | assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
coleenp@4037 | 3222 | "ClassLoaderData::the_null_class_loader_data() should have been used."); |
coleenp@4037 | 3223 | // Allocate in metaspaces without taking out a lock, because it deadlocks |
coleenp@4037 | 3224 | // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
coleenp@4037 | 3225 | // to revisit this for application class data sharing. |
coleenp@4037 | 3226 | if (DumpSharedSpaces) { |
iklam@5208 | 3227 | assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
iklam@5208 | 3228 | Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
iklam@5208 | 3229 | result = space->allocate(word_size, NonClassType); |
coleenp@4037 | 3230 | if (result == NULL) { |
coleenp@4037 | 3231 | report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
iklam@5208 | 3232 | } else { |
iklam@5208 | 3233 | space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); |
coleenp@4037 | 3234 | } |
jmasa@4196 | 3235 | return Metablock::initialize(result, word_size); |
coleenp@4037 | 3236 | } |
coleenp@4037 | 3237 | |
coleenp@4037 | 3238 | result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
coleenp@4037 | 3239 | |
coleenp@4037 | 3240 | if (result == NULL) { |
coleenp@4037 | 3241 | // Try to clean out some memory and retry. |
coleenp@4037 | 3242 | result = |
jmasa@4196 | 3243 | Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
coleenp@4037 | 3244 | loader_data, word_size, mdtype); |
coleenp@4037 | 3245 | |
coleenp@4037 | 3246 | // If result is still null, we are out of memory. |
coleenp@4037 | 3247 | if (result == NULL) { |
jmasa@4382 | 3248 | if (Verbose && TraceMetadataChunkAllocation) { |
jmasa@4382 | 3249 | gclog_or_tty->print_cr("Metaspace allocation failed for size " |
jmasa@4382 | 3250 | SIZE_FORMAT, word_size); |
coleenp@5337 | 3251 | if (loader_data->metaspace_or_null() != NULL) loader_data->dump(gclog_or_tty); |
jmasa@4382 | 3252 | MetaspaceAux::dump(gclog_or_tty); |
jmasa@4382 | 3253 | } |
coleenp@4037 | 3254 | // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
ehelin@5694 | 3255 | const char* space_string = (mdtype == ClassType) ? "Compressed class space" : |
coleenp@5337 | 3256 | "Metadata space"; |
coleenp@5337 | 3257 | report_java_out_of_memory(space_string); |
coleenp@4037 | 3258 | |
coleenp@4037 | 3259 | if (JvmtiExport::should_post_resource_exhausted()) { |
coleenp@4037 | 3260 | JvmtiExport::post_resource_exhausted( |
coleenp@4037 | 3261 | JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
coleenp@5337 | 3262 | space_string); |
coleenp@4037 | 3263 | } |
coleenp@5337 | 3264 | if (mdtype == ClassType) { |
coleenp@5337 | 3265 | THROW_OOP_0(Universe::out_of_memory_error_class_metaspace()); |
coleenp@5337 | 3266 | } else { |
coleenp@5337 | 3267 | THROW_OOP_0(Universe::out_of_memory_error_metaspace()); |
coleenp@5337 | 3268 | } |
coleenp@4037 | 3269 | } |
coleenp@4037 | 3270 | } |
jmasa@4196 | 3271 | return Metablock::initialize(result, word_size); |
coleenp@4037 | 3272 | } |
coleenp@4037 | 3273 | |
iklam@5208 | 3274 | void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
iklam@5208 | 3275 | assert(DumpSharedSpaces, "sanity"); |
iklam@5208 | 3276 | |
iklam@5208 | 3277 | AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
iklam@5208 | 3278 | if (_alloc_record_head == NULL) { |
iklam@5208 | 3279 | _alloc_record_head = _alloc_record_tail = rec; |
iklam@5208 | 3280 | } else { |
iklam@5208 | 3281 | _alloc_record_tail->_next = rec; |
iklam@5208 | 3282 | _alloc_record_tail = rec; |
iklam@5208 | 3283 | } |
iklam@5208 | 3284 | } |
iklam@5208 | 3285 | |
iklam@5208 | 3286 | void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
iklam@5208 | 3287 | assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
iklam@5208 | 3288 | |
iklam@5208 | 3289 | address last_addr = (address)bottom(); |
iklam@5208 | 3290 | |
iklam@5208 | 3291 | for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
iklam@5208 | 3292 | address ptr = rec->_ptr; |
iklam@5208 | 3293 | if (last_addr < ptr) { |
iklam@5208 | 3294 | closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
iklam@5208 | 3295 | } |
iklam@5208 | 3296 | closure->doit(ptr, rec->_type, rec->_byte_size); |
iklam@5208 | 3297 | last_addr = ptr + rec->_byte_size; |
iklam@5208 | 3298 | } |
iklam@5208 | 3299 | |
iklam@5208 | 3300 | address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
iklam@5208 | 3301 | if (last_addr < top) { |
iklam@5208 | 3302 | closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
iklam@5208 | 3303 | } |
iklam@5208 | 3304 | } |
iklam@5208 | 3305 | |
stefank@5771 | 3306 | void Metaspace::purge(MetadataType mdtype) { |
stefank@5771 | 3307 | get_space_list(mdtype)->purge(get_chunk_manager(mdtype)); |
stefank@5771 | 3308 | } |
stefank@5771 | 3309 | |
jmasa@5007 | 3310 | void Metaspace::purge() { |
jmasa@5007 | 3311 | MutexLockerEx cl(SpaceManager::expand_lock(), |
jmasa@5007 | 3312 | Mutex::_no_safepoint_check_flag); |
stefank@5771 | 3313 | purge(NonClassType); |
hseigel@5528 | 3314 | if (using_class_space()) { |
stefank@5771 | 3315 | purge(ClassType); |
hseigel@5528 | 3316 | } |
jmasa@5007 | 3317 | } |
jmasa@5007 | 3318 | |
coleenp@4037 | 3319 | void Metaspace::print_on(outputStream* out) const { |
coleenp@4037 | 3320 | // Print both class virtual space counts and metaspace. |
coleenp@4037 | 3321 | if (Verbose) { |
hseigel@5528 | 3322 | vsm()->print_on(out); |
hseigel@5528 | 3323 | if (using_class_space()) { |
coleenp@4037 | 3324 | class_vsm()->print_on(out); |
hseigel@5528 | 3325 | } |
coleenp@4037 | 3326 | } |
coleenp@4037 | 3327 | } |
coleenp@4037 | 3328 | |
coleenp@4295 | 3329 | bool Metaspace::contains(const void * ptr) { |
coleenp@4037 | 3330 | if (MetaspaceShared::is_in_shared_space(ptr)) { |
coleenp@4037 | 3331 | return true; |
coleenp@4037 | 3332 | } |
coleenp@4295 | 3333 | // This is checked while unlocked. As long as the virtualspaces are added |
coleenp@4295 | 3334 | // at the end, the pointer will be in one of them. The virtual spaces |
coleenp@4295 | 3335 | // aren't deleted presently. When they are, some sort of locking might |
coleenp@4295 | 3336 | // be needed. Note, locking this can cause inversion problems with the |
coleenp@4295 | 3337 | // caller in MetaspaceObj::is_metadata() function. |
jmasa@5007 | 3338 | return space_list()->contains(ptr) || |
hseigel@5528 | 3339 | (using_class_space() && class_space_list()->contains(ptr)); |
coleenp@4037 | 3340 | } |
coleenp@4037 | 3341 | |
coleenp@4037 | 3342 | void Metaspace::verify() { |
coleenp@4037 | 3343 | vsm()->verify(); |
hseigel@5528 | 3344 | if (using_class_space()) { |
hseigel@5528 | 3345 | class_vsm()->verify(); |
hseigel@5528 | 3346 | } |
coleenp@4037 | 3347 | } |
coleenp@4037 | 3348 | |
coleenp@4037 | 3349 | void Metaspace::dump(outputStream* const out) const { |
coleenp@4037 | 3350 | out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
coleenp@4037 | 3351 | vsm()->dump(out); |
hseigel@5528 | 3352 | if (using_class_space()) { |
hseigel@5528 | 3353 | out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
hseigel@5528 | 3354 | class_vsm()->dump(out); |
hseigel@5528 | 3355 | } |
coleenp@4037 | 3356 | } |
stefank@5704 | 3357 | |
stefank@5704 | 3358 | /////////////// Unit tests /////////////// |
stefank@5704 | 3359 | |
stefank@5704 | 3360 | #ifndef PRODUCT |
stefank@5704 | 3361 | |
brutisso@5774 | 3362 | class TestMetaspaceAuxTest : AllStatic { |
stefank@5704 | 3363 | public: |
stefank@5704 | 3364 | static void test_reserved() { |
stefank@5704 | 3365 | size_t reserved = MetaspaceAux::reserved_bytes(); |
stefank@5704 | 3366 | |
stefank@5704 | 3367 | assert(reserved > 0, "assert"); |
stefank@5704 | 3368 | |
stefank@5704 | 3369 | size_t committed = MetaspaceAux::committed_bytes(); |
stefank@5704 | 3370 | assert(committed <= reserved, "assert"); |
stefank@5704 | 3371 | |
stefank@5704 | 3372 | size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
stefank@5704 | 3373 | assert(reserved_metadata > 0, "assert"); |
stefank@5704 | 3374 | assert(reserved_metadata <= reserved, "assert"); |
stefank@5704 | 3375 | |
stefank@5704 | 3376 | if (UseCompressedClassPointers) { |
stefank@5704 | 3377 | size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
stefank@5704 | 3378 | assert(reserved_class > 0, "assert"); |
stefank@5704 | 3379 | assert(reserved_class < reserved, "assert"); |
stefank@5704 | 3380 | } |
stefank@5704 | 3381 | } |
stefank@5704 | 3382 | |
stefank@5704 | 3383 | static void test_committed() { |
stefank@5704 | 3384 | size_t committed = MetaspaceAux::committed_bytes(); |
stefank@5704 | 3385 | |
stefank@5704 | 3386 | assert(committed > 0, "assert"); |
stefank@5704 | 3387 | |
stefank@5704 | 3388 | size_t reserved = MetaspaceAux::reserved_bytes(); |
stefank@5704 | 3389 | assert(committed <= reserved, "assert"); |
stefank@5704 | 3390 | |
stefank@5704 | 3391 | size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
stefank@5704 | 3392 | assert(committed_metadata > 0, "assert"); |
stefank@5704 | 3393 | assert(committed_metadata <= committed, "assert"); |
stefank@5704 | 3394 | |
stefank@5704 | 3395 | if (UseCompressedClassPointers) { |
stefank@5704 | 3396 | size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
stefank@5704 | 3397 | assert(committed_class > 0, "assert"); |
stefank@5704 | 3398 | assert(committed_class < committed, "assert"); |
stefank@5704 | 3399 | } |
stefank@5704 | 3400 | } |
stefank@5704 | 3401 | |
brutisso@5774 | 3402 | static void test_virtual_space_list_large_chunk() { |
brutisso@5774 | 3403 | VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity()); |
brutisso@5774 | 3404 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
brutisso@5774 | 3405 | // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be |
brutisso@5774 | 3406 | // vm_allocation_granularity aligned on Windows. |
brutisso@5774 | 3407 | size_t large_size = (size_t)(2*256*K + (os::vm_page_size()/BytesPerWord)); |
brutisso@5774 | 3408 | large_size += (os::vm_page_size()/BytesPerWord); |
brutisso@5774 | 3409 | vs_list->get_new_chunk(large_size, large_size, 0); |
brutisso@5774 | 3410 | } |
brutisso@5774 | 3411 | |
stefank@5704 | 3412 | static void test() { |
stefank@5704 | 3413 | test_reserved(); |
stefank@5704 | 3414 | test_committed(); |
brutisso@5774 | 3415 | test_virtual_space_list_large_chunk(); |
stefank@5704 | 3416 | } |
stefank@5704 | 3417 | }; |
stefank@5704 | 3418 | |
brutisso@5774 | 3419 | void TestMetaspaceAux_test() { |
brutisso@5774 | 3420 | TestMetaspaceAuxTest::test(); |
stefank@5704 | 3421 | } |
stefank@5704 | 3422 | |
stefank@5704 | 3423 | #endif |