Mon, 04 Aug 2014 10:48:10 -0700
8031323: Optionally align objects copied to survivor spaces
Reviewed-by: brutisso, tschatzl
coleenp@4037 | 1 | /* |
drchase@6680 | 2 | * Copyright (c) 2011, 2014, 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" |
stefank@5863 | 32 | #include "memory/gcLocker.hpp" |
jmasa@4196 | 33 | #include "memory/metachunk.hpp" |
coleenp@4037 | 34 | #include "memory/metaspace.hpp" |
ehelin@6417 | 35 | #include "memory/metaspaceGCThresholdUpdater.hpp" |
coleenp@4037 | 36 | #include "memory/metaspaceShared.hpp" |
ehelin@6417 | 37 | #include "memory/metaspaceTracer.hpp" |
coleenp@4037 | 38 | #include "memory/resourceArea.hpp" |
coleenp@4037 | 39 | #include "memory/universe.hpp" |
stefank@5863 | 40 | #include "runtime/atomic.inline.hpp" |
coleenp@4037 | 41 | #include "runtime/globals.hpp" |
stefank@5863 | 42 | #include "runtime/init.hpp" |
hseigel@5528 | 43 | #include "runtime/java.hpp" |
coleenp@4037 | 44 | #include "runtime/mutex.hpp" |
goetz@6911 | 45 | #include "runtime/orderAccess.inline.hpp" |
coleenp@4037 | 46 | #include "services/memTracker.hpp" |
stefank@5864 | 47 | #include "services/memoryService.hpp" |
coleenp@4037 | 48 | #include "utilities/copy.hpp" |
coleenp@4037 | 49 | #include "utilities/debug.hpp" |
coleenp@4037 | 50 | |
drchase@6680 | 51 | PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
drchase@6680 | 52 | |
goetz@6337 | 53 | typedef BinaryTreeDictionary<Metablock, FreeList<Metablock> > BlockTreeDictionary; |
goetz@6337 | 54 | typedef BinaryTreeDictionary<Metachunk, FreeList<Metachunk> > ChunkTreeDictionary; |
stefank@5941 | 55 | |
stefank@5941 | 56 | // Set this constant to enable slow integrity checking of the free chunk lists |
mgerdin@4264 | 57 | const bool metaspace_slow_verify = false; |
mgerdin@4264 | 58 | |
mgerdin@5699 | 59 | size_t const allocation_from_dictionary_limit = 4 * K; |
coleenp@4037 | 60 | |
coleenp@4037 | 61 | MetaWord* last_allocated = 0; |
coleenp@4037 | 62 | |
coleenp@6029 | 63 | size_t Metaspace::_compressed_class_space_size; |
ehelin@6417 | 64 | const MetaspaceTracer* Metaspace::_tracer = NULL; |
hseigel@5528 | 65 | |
coleenp@4037 | 66 | // Used in declarations in SpaceManager and ChunkManager |
coleenp@4037 | 67 | enum ChunkIndex { |
jmasa@4382 | 68 | ZeroIndex = 0, |
jmasa@4382 | 69 | SpecializedIndex = ZeroIndex, |
jmasa@4382 | 70 | SmallIndex = SpecializedIndex + 1, |
jmasa@4382 | 71 | MediumIndex = SmallIndex + 1, |
jmasa@4382 | 72 | HumongousIndex = MediumIndex + 1, |
jmasa@4382 | 73 | NumberOfFreeLists = 3, |
jmasa@4382 | 74 | NumberOfInUseLists = 4 |
jmasa@4382 | 75 | }; |
jmasa@4382 | 76 | |
jmasa@4382 | 77 | enum ChunkSizes { // in words. |
jmasa@4382 | 78 | ClassSpecializedChunk = 128, |
jmasa@4382 | 79 | SpecializedChunk = 128, |
jmasa@4382 | 80 | ClassSmallChunk = 256, |
jmasa@4382 | 81 | SmallChunk = 512, |
coleenp@5337 | 82 | ClassMediumChunk = 4 * K, |
mgerdin@6004 | 83 | MediumChunk = 8 * K |
coleenp@4037 | 84 | }; |
coleenp@4037 | 85 | |
coleenp@4037 | 86 | static ChunkIndex next_chunk_index(ChunkIndex i) { |
jmasa@4196 | 87 | assert(i < NumberOfInUseLists, "Out of bound"); |
coleenp@4037 | 88 | return (ChunkIndex) (i+1); |
coleenp@4037 | 89 | } |
coleenp@4037 | 90 | |
stefank@5863 | 91 | volatile intptr_t MetaspaceGC::_capacity_until_GC = 0; |
coleenp@4037 | 92 | uint MetaspaceGC::_shrink_factor = 0; |
coleenp@4037 | 93 | bool MetaspaceGC::_should_concurrent_collect = false; |
coleenp@4037 | 94 | |
jmasa@4932 | 95 | typedef class FreeList<Metachunk> ChunkList; |
coleenp@4037 | 96 | |
coleenp@4037 | 97 | // Manages the global free lists of chunks. |
stefank@5771 | 98 | class ChunkManager : public CHeapObj<mtInternal> { |
mgerdin@6004 | 99 | friend class TestVirtualSpaceNodeTest; |
coleenp@4037 | 100 | |
coleenp@4037 | 101 | // Free list of chunks of different sizes. |
jmasa@5007 | 102 | // SpecializedChunk |
coleenp@4037 | 103 | // SmallChunk |
coleenp@4037 | 104 | // MediumChunk |
coleenp@4037 | 105 | // HumongousChunk |
jmasa@4196 | 106 | ChunkList _free_chunks[NumberOfFreeLists]; |
jmasa@4196 | 107 | |
jmasa@4196 | 108 | // HumongousChunk |
jmasa@4196 | 109 | ChunkTreeDictionary _humongous_dictionary; |
coleenp@4037 | 110 | |
coleenp@4037 | 111 | // ChunkManager in all lists of this type |
coleenp@4037 | 112 | size_t _free_chunks_total; |
coleenp@4037 | 113 | size_t _free_chunks_count; |
coleenp@4037 | 114 | |
coleenp@4037 | 115 | void dec_free_chunks_total(size_t v) { |
coleenp@4037 | 116 | assert(_free_chunks_count > 0 && |
coleenp@4037 | 117 | _free_chunks_total > 0, |
coleenp@4037 | 118 | "About to go negative"); |
coleenp@4037 | 119 | Atomic::add_ptr(-1, &_free_chunks_count); |
coleenp@4037 | 120 | jlong minus_v = (jlong) - (jlong) v; |
coleenp@4037 | 121 | Atomic::add_ptr(minus_v, &_free_chunks_total); |
coleenp@4037 | 122 | } |
coleenp@4037 | 123 | |
coleenp@4037 | 124 | // Debug support |
coleenp@4037 | 125 | |
coleenp@4037 | 126 | size_t sum_free_chunks(); |
coleenp@4037 | 127 | size_t sum_free_chunks_count(); |
coleenp@4037 | 128 | |
coleenp@4037 | 129 | void locked_verify_free_chunks_total(); |
mgerdin@4264 | 130 | void slow_locked_verify_free_chunks_total() { |
mgerdin@4264 | 131 | if (metaspace_slow_verify) { |
mgerdin@4264 | 132 | locked_verify_free_chunks_total(); |
mgerdin@4264 | 133 | } |
mgerdin@4264 | 134 | } |
coleenp@4037 | 135 | void locked_verify_free_chunks_count(); |
mgerdin@4264 | 136 | void slow_locked_verify_free_chunks_count() { |
mgerdin@4264 | 137 | if (metaspace_slow_verify) { |
mgerdin@4264 | 138 | locked_verify_free_chunks_count(); |
mgerdin@4264 | 139 | } |
mgerdin@4264 | 140 | } |
coleenp@4037 | 141 | void verify_free_chunks_count(); |
coleenp@4037 | 142 | |
coleenp@4037 | 143 | public: |
coleenp@4037 | 144 | |
stefank@5771 | 145 | ChunkManager(size_t specialized_size, size_t small_size, size_t medium_size) |
stefank@5771 | 146 | : _free_chunks_total(0), _free_chunks_count(0) { |
stefank@5771 | 147 | _free_chunks[SpecializedIndex].set_size(specialized_size); |
stefank@5771 | 148 | _free_chunks[SmallIndex].set_size(small_size); |
stefank@5771 | 149 | _free_chunks[MediumIndex].set_size(medium_size); |
stefank@5771 | 150 | } |
coleenp@4037 | 151 | |
coleenp@4037 | 152 | // add or delete (return) a chunk to the global freelist. |
coleenp@4037 | 153 | Metachunk* chunk_freelist_allocate(size_t word_size); |
coleenp@4037 | 154 | |
jmasa@4382 | 155 | // Map a size to a list index assuming that there are lists |
jmasa@4382 | 156 | // for special, small, medium, and humongous chunks. |
jmasa@4382 | 157 | static ChunkIndex list_index(size_t size); |
jmasa@4382 | 158 | |
jmasa@5007 | 159 | // Remove the chunk from its freelist. It is |
jmasa@5007 | 160 | // expected to be on one of the _free_chunks[] lists. |
jmasa@5007 | 161 | void remove_chunk(Metachunk* chunk); |
jmasa@5007 | 162 | |
jmasa@4932 | 163 | // Add the simple linked list of chunks to the freelist of chunks |
jmasa@4932 | 164 | // of type index. |
jmasa@4932 | 165 | void return_chunks(ChunkIndex index, Metachunk* chunks); |
jmasa@4932 | 166 | |
coleenp@4037 | 167 | // Total of the space in the free chunks list |
ehelin@5703 | 168 | size_t free_chunks_total_words(); |
ehelin@5703 | 169 | size_t free_chunks_total_bytes(); |
coleenp@4037 | 170 | |
coleenp@4037 | 171 | // Number of chunks in the free chunks list |
coleenp@4037 | 172 | size_t free_chunks_count(); |
coleenp@4037 | 173 | |
coleenp@4037 | 174 | void inc_free_chunks_total(size_t v, size_t count = 1) { |
coleenp@4037 | 175 | Atomic::add_ptr(count, &_free_chunks_count); |
coleenp@4037 | 176 | Atomic::add_ptr(v, &_free_chunks_total); |
coleenp@4037 | 177 | } |
jmasa@4196 | 178 | ChunkTreeDictionary* humongous_dictionary() { |
jmasa@4196 | 179 | return &_humongous_dictionary; |
jmasa@4196 | 180 | } |
coleenp@4037 | 181 | |
coleenp@4037 | 182 | ChunkList* free_chunks(ChunkIndex index); |
coleenp@4037 | 183 | |
coleenp@4037 | 184 | // Returns the list for the given chunk word size. |
coleenp@4037 | 185 | ChunkList* find_free_chunks_list(size_t word_size); |
coleenp@4037 | 186 | |
stefank@5945 | 187 | // Remove from a list by size. Selects list based on size of chunk. |
coleenp@4037 | 188 | Metachunk* free_chunks_get(size_t chunk_word_size); |
coleenp@4037 | 189 | |
ehelin@6420 | 190 | #define index_bounds_check(index) \ |
ehelin@6420 | 191 | assert(index == SpecializedIndex || \ |
ehelin@6420 | 192 | index == SmallIndex || \ |
ehelin@6420 | 193 | index == MediumIndex || \ |
ehelin@6420 | 194 | index == HumongousIndex, err_msg("Bad index: %d", (int) index)) |
ehelin@6420 | 195 | |
ehelin@6420 | 196 | size_t num_free_chunks(ChunkIndex index) const { |
ehelin@6420 | 197 | index_bounds_check(index); |
ehelin@6420 | 198 | |
ehelin@6420 | 199 | if (index == HumongousIndex) { |
ehelin@6420 | 200 | return _humongous_dictionary.total_free_blocks(); |
ehelin@6420 | 201 | } |
ehelin@6420 | 202 | |
ehelin@6420 | 203 | ssize_t count = _free_chunks[index].count(); |
ehelin@6420 | 204 | return count == -1 ? 0 : (size_t) count; |
ehelin@6420 | 205 | } |
ehelin@6420 | 206 | |
ehelin@6420 | 207 | size_t size_free_chunks_in_bytes(ChunkIndex index) const { |
ehelin@6420 | 208 | index_bounds_check(index); |
ehelin@6420 | 209 | |
ehelin@6420 | 210 | size_t word_size = 0; |
ehelin@6420 | 211 | if (index == HumongousIndex) { |
ehelin@6420 | 212 | word_size = _humongous_dictionary.total_size(); |
ehelin@6420 | 213 | } else { |
ehelin@6420 | 214 | const size_t size_per_chunk_in_words = _free_chunks[index].size(); |
ehelin@6420 | 215 | word_size = size_per_chunk_in_words * num_free_chunks(index); |
ehelin@6420 | 216 | } |
ehelin@6420 | 217 | |
ehelin@6420 | 218 | return word_size * BytesPerWord; |
ehelin@6420 | 219 | } |
ehelin@6420 | 220 | |
ehelin@6420 | 221 | MetaspaceChunkFreeListSummary chunk_free_list_summary() const { |
ehelin@6420 | 222 | return MetaspaceChunkFreeListSummary(num_free_chunks(SpecializedIndex), |
ehelin@6420 | 223 | num_free_chunks(SmallIndex), |
ehelin@6420 | 224 | num_free_chunks(MediumIndex), |
ehelin@6420 | 225 | num_free_chunks(HumongousIndex), |
ehelin@6420 | 226 | size_free_chunks_in_bytes(SpecializedIndex), |
ehelin@6420 | 227 | size_free_chunks_in_bytes(SmallIndex), |
ehelin@6420 | 228 | size_free_chunks_in_bytes(MediumIndex), |
ehelin@6420 | 229 | size_free_chunks_in_bytes(HumongousIndex)); |
ehelin@6420 | 230 | } |
ehelin@6420 | 231 | |
coleenp@4037 | 232 | // Debug support |
coleenp@4037 | 233 | void verify(); |
mgerdin@4264 | 234 | void slow_verify() { |
mgerdin@4264 | 235 | if (metaspace_slow_verify) { |
mgerdin@4264 | 236 | verify(); |
mgerdin@4264 | 237 | } |
mgerdin@4264 | 238 | } |
coleenp@4037 | 239 | void locked_verify(); |
mgerdin@4264 | 240 | void slow_locked_verify() { |
mgerdin@4264 | 241 | if (metaspace_slow_verify) { |
mgerdin@4264 | 242 | locked_verify(); |
mgerdin@4264 | 243 | } |
mgerdin@4264 | 244 | } |
coleenp@4037 | 245 | void verify_free_chunks_total(); |
coleenp@4037 | 246 | |
coleenp@4037 | 247 | void locked_print_free_chunks(outputStream* st); |
coleenp@4037 | 248 | void locked_print_sum_free_chunks(outputStream* st); |
jmasa@4196 | 249 | |
stefank@5771 | 250 | void print_on(outputStream* st) const; |
coleenp@4037 | 251 | }; |
coleenp@4037 | 252 | |
coleenp@4037 | 253 | // Used to manage the free list of Metablocks (a block corresponds |
coleenp@4037 | 254 | // to the allocation of a quantum of metadata). |
coleenp@4037 | 255 | class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
jmasa@4196 | 256 | BlockTreeDictionary* _dictionary; |
jmasa@4196 | 257 | |
mgerdin@5699 | 258 | // Only allocate and split from freelist if the size of the allocation |
mgerdin@5699 | 259 | // is at least 1/4th the size of the available block. |
mgerdin@5699 | 260 | const static int WasteMultiplier = 4; |
mgerdin@5699 | 261 | |
coleenp@4037 | 262 | // Accessors |
jmasa@4196 | 263 | BlockTreeDictionary* dictionary() const { return _dictionary; } |
coleenp@4037 | 264 | |
coleenp@4037 | 265 | public: |
coleenp@4037 | 266 | BlockFreelist(); |
coleenp@4037 | 267 | ~BlockFreelist(); |
coleenp@4037 | 268 | |
coleenp@4037 | 269 | // Get and return a block to the free list |
jmasa@4196 | 270 | MetaWord* get_block(size_t word_size); |
jmasa@4196 | 271 | void return_block(MetaWord* p, size_t word_size); |
jmasa@4196 | 272 | |
jmasa@4196 | 273 | size_t total_size() { |
jmasa@4196 | 274 | if (dictionary() == NULL) { |
coleenp@4037 | 275 | return 0; |
jmasa@4196 | 276 | } else { |
jmasa@4196 | 277 | return dictionary()->total_size(); |
coleenp@4037 | 278 | } |
jmasa@4196 | 279 | } |
coleenp@4037 | 280 | |
coleenp@4037 | 281 | void print_on(outputStream* st) const; |
coleenp@4037 | 282 | }; |
coleenp@4037 | 283 | |
stefank@5941 | 284 | // A VirtualSpaceList node. |
coleenp@4037 | 285 | class VirtualSpaceNode : public CHeapObj<mtClass> { |
coleenp@4037 | 286 | friend class VirtualSpaceList; |
coleenp@4037 | 287 | |
coleenp@4037 | 288 | // Link to next VirtualSpaceNode |
coleenp@4037 | 289 | VirtualSpaceNode* _next; |
coleenp@4037 | 290 | |
coleenp@4037 | 291 | // total in the VirtualSpace |
coleenp@4037 | 292 | MemRegion _reserved; |
coleenp@4037 | 293 | ReservedSpace _rs; |
coleenp@4037 | 294 | VirtualSpace _virtual_space; |
coleenp@4037 | 295 | MetaWord* _top; |
jmasa@5007 | 296 | // count of chunks contained in this VirtualSpace |
jmasa@5007 | 297 | uintx _container_count; |
coleenp@4037 | 298 | |
coleenp@4037 | 299 | // Convenience functions to access the _virtual_space |
coleenp@4037 | 300 | char* low() const { return virtual_space()->low(); } |
coleenp@4037 | 301 | char* high() const { return virtual_space()->high(); } |
coleenp@4037 | 302 | |
jmasa@5007 | 303 | // The first Metachunk will be allocated at the bottom of the |
jmasa@5007 | 304 | // VirtualSpace |
jmasa@5007 | 305 | Metachunk* first_chunk() { return (Metachunk*) bottom(); } |
jmasa@5007 | 306 | |
mgerdin@6004 | 307 | // Committed but unused space in the virtual space |
mgerdin@6004 | 308 | size_t free_words_in_vs() const; |
coleenp@4037 | 309 | public: |
coleenp@4037 | 310 | |
coleenp@4037 | 311 | VirtualSpaceNode(size_t byte_size); |
jmasa@5007 | 312 | VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs), _container_count(0) {} |
coleenp@4037 | 313 | ~VirtualSpaceNode(); |
coleenp@4037 | 314 | |
hseigel@5528 | 315 | // Convenience functions for logical bottom and end |
hseigel@5528 | 316 | MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
hseigel@5528 | 317 | MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
hseigel@5528 | 318 | |
coleenp@6678 | 319 | bool contains(const void* ptr) { return ptr >= low() && ptr < high(); } |
coleenp@6678 | 320 | |
stefank@5704 | 321 | size_t reserved_words() const { return _virtual_space.reserved_size() / BytesPerWord; } |
stefank@5704 | 322 | size_t committed_words() const { return _virtual_space.actual_committed_size() / BytesPerWord; } |
stefank@5704 | 323 | |
stefank@5863 | 324 | bool is_pre_committed() const { return _virtual_space.special(); } |
stefank@5863 | 325 | |
coleenp@4037 | 326 | // address of next available space in _virtual_space; |
coleenp@4037 | 327 | // Accessors |
coleenp@4037 | 328 | VirtualSpaceNode* next() { return _next; } |
coleenp@4037 | 329 | void set_next(VirtualSpaceNode* v) { _next = v; } |
coleenp@4037 | 330 | |
coleenp@4037 | 331 | void set_reserved(MemRegion const v) { _reserved = v; } |
coleenp@4037 | 332 | void set_top(MetaWord* v) { _top = v; } |
coleenp@4037 | 333 | |
coleenp@4037 | 334 | // Accessors |
coleenp@4037 | 335 | MemRegion* reserved() { return &_reserved; } |
coleenp@4037 | 336 | VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
coleenp@4037 | 337 | |
jmasa@5015 | 338 | // Returns true if "word_size" is available in the VirtualSpace |
stefank@6170 | 339 | bool is_available(size_t word_size) { return word_size <= pointer_delta(end(), _top, sizeof(MetaWord)); } |
coleenp@4037 | 340 | |
coleenp@4037 | 341 | MetaWord* top() const { return _top; } |
coleenp@4037 | 342 | void inc_top(size_t word_size) { _top += word_size; } |
coleenp@4037 | 343 | |
jmasa@5007 | 344 | uintx container_count() { return _container_count; } |
stefank@5771 | 345 | void inc_container_count(); |
jmasa@5007 | 346 | void dec_container_count(); |
jmasa@5007 | 347 | #ifdef ASSERT |
stefank@5771 | 348 | uint container_count_slow(); |
jmasa@5007 | 349 | void verify_container_count(); |
jmasa@5007 | 350 | #endif |
jmasa@5007 | 351 | |
coleenp@4037 | 352 | // used and capacity in this single entry in the list |
coleenp@4037 | 353 | size_t used_words_in_vs() const; |
coleenp@4037 | 354 | size_t capacity_words_in_vs() const; |
coleenp@4037 | 355 | |
coleenp@4037 | 356 | bool initialize(); |
coleenp@4037 | 357 | |
coleenp@4037 | 358 | // get space from the virtual space |
coleenp@4037 | 359 | Metachunk* take_from_committed(size_t chunk_word_size); |
coleenp@4037 | 360 | |
coleenp@4037 | 361 | // Allocate a chunk from the virtual space and return it. |
coleenp@4037 | 362 | Metachunk* get_chunk_vs(size_t chunk_word_size); |
coleenp@4037 | 363 | |
coleenp@4037 | 364 | // Expands/shrinks the committed space in a virtual space. Delegates |
coleenp@4037 | 365 | // to Virtualspace |
stefank@5863 | 366 | bool expand_by(size_t min_words, size_t preferred_words); |
coleenp@4037 | 367 | |
jmasa@5007 | 368 | // In preparation for deleting this node, remove all the chunks |
jmasa@5007 | 369 | // in the node from any freelist. |
jmasa@5007 | 370 | void purge(ChunkManager* chunk_manager); |
jmasa@5007 | 371 | |
mgerdin@6004 | 372 | // If an allocation doesn't fit in the current node a new node is created. |
mgerdin@6004 | 373 | // Allocate chunks out of the remaining committed space in this node |
mgerdin@6004 | 374 | // to avoid wasting that memory. |
mgerdin@6004 | 375 | // This always adds up because all the chunk sizes are multiples of |
mgerdin@6004 | 376 | // the smallest chunk size. |
mgerdin@6004 | 377 | void retire(ChunkManager* chunk_manager); |
mgerdin@6004 | 378 | |
coleenp@4304 | 379 | #ifdef ASSERT |
coleenp@4037 | 380 | // Debug support |
coleenp@4037 | 381 | void mangle(); |
coleenp@4304 | 382 | #endif |
coleenp@4037 | 383 | |
coleenp@4037 | 384 | void print_on(outputStream* st) const; |
coleenp@4037 | 385 | }; |
coleenp@4037 | 386 | |
stefank@5863 | 387 | #define assert_is_ptr_aligned(ptr, alignment) \ |
stefank@5863 | 388 | assert(is_ptr_aligned(ptr, alignment), \ |
stefank@5863 | 389 | err_msg(PTR_FORMAT " is not aligned to " \ |
stefank@5863 | 390 | SIZE_FORMAT, ptr, alignment)) |
stefank@5863 | 391 | |
stefank@5863 | 392 | #define assert_is_size_aligned(size, alignment) \ |
stefank@5863 | 393 | assert(is_size_aligned(size, alignment), \ |
stefank@5863 | 394 | err_msg(SIZE_FORMAT " is not aligned to " \ |
stefank@5863 | 395 | SIZE_FORMAT, size, alignment)) |
stefank@5863 | 396 | |
stefank@5863 | 397 | |
stefank@5863 | 398 | // Decide if large pages should be committed when the memory is reserved. |
stefank@5863 | 399 | static bool should_commit_large_pages_when_reserving(size_t bytes) { |
stefank@5863 | 400 | if (UseLargePages && UseLargePagesInMetaspace && !os::can_commit_large_page_memory()) { |
stefank@5863 | 401 | size_t words = bytes / BytesPerWord; |
stefank@5863 | 402 | bool is_class = false; // We never reserve large pages for the class space. |
stefank@5863 | 403 | if (MetaspaceGC::can_expand(words, is_class) && |
stefank@5863 | 404 | MetaspaceGC::allowed_expansion() >= words) { |
stefank@5863 | 405 | return true; |
stefank@5863 | 406 | } |
stefank@5863 | 407 | } |
stefank@5863 | 408 | |
stefank@5863 | 409 | return false; |
stefank@5863 | 410 | } |
stefank@5863 | 411 | |
coleenp@4037 | 412 | // byte_size is the size of the associated virtualspace. |
stefank@5863 | 413 | VirtualSpaceNode::VirtualSpaceNode(size_t bytes) : _top(NULL), _next(NULL), _rs(), _container_count(0) { |
stefank@5863 | 414 | assert_is_size_aligned(bytes, Metaspace::reserve_alignment()); |
zgu@4752 | 415 | |
coleenp@4804 | 416 | // This allocates memory with mmap. For DumpSharedspaces, try to reserve |
coleenp@4804 | 417 | // configurable address, generally at the top of the Java heap so other |
coleenp@4804 | 418 | // memory addresses don't conflict. |
coleenp@4037 | 419 | if (DumpSharedSpaces) { |
stefank@5863 | 420 | bool large_pages = false; // No large pages when dumping the CDS archive. |
stefank@5863 | 421 | char* shared_base = (char*)align_ptr_up((char*)SharedBaseAddress, Metaspace::reserve_alignment()); |
stefank@5863 | 422 | |
stefank@5863 | 423 | _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages, shared_base, 0); |
coleenp@4037 | 424 | if (_rs.is_reserved()) { |
coleenp@4804 | 425 | assert(shared_base == 0 || _rs.base() == shared_base, "should match"); |
coleenp@4037 | 426 | } else { |
coleenp@4804 | 427 | // Get a mmap region anywhere if the SharedBaseAddress fails. |
stefank@5863 | 428 | _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
coleenp@4037 | 429 | } |
coleenp@4037 | 430 | MetaspaceShared::set_shared_rs(&_rs); |
coleenp@4037 | 431 | } else { |
stefank@5863 | 432 | bool large_pages = should_commit_large_pages_when_reserving(bytes); |
stefank@5863 | 433 | |
stefank@5863 | 434 | _rs = ReservedSpace(bytes, Metaspace::reserve_alignment(), large_pages); |
coleenp@4037 | 435 | } |
coleenp@4037 | 436 | |
stefank@5863 | 437 | if (_rs.is_reserved()) { |
stefank@5863 | 438 | assert(_rs.base() != NULL, "Catch if we get a NULL address"); |
stefank@5863 | 439 | assert(_rs.size() != 0, "Catch if we get a 0 size"); |
stefank@5863 | 440 | assert_is_ptr_aligned(_rs.base(), Metaspace::reserve_alignment()); |
stefank@5863 | 441 | assert_is_size_aligned(_rs.size(), Metaspace::reserve_alignment()); |
stefank@5863 | 442 | |
stefank@5863 | 443 | MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
stefank@5863 | 444 | } |
coleenp@4037 | 445 | } |
coleenp@4037 | 446 | |
jmasa@5007 | 447 | void VirtualSpaceNode::purge(ChunkManager* chunk_manager) { |
jmasa@5007 | 448 | Metachunk* chunk = first_chunk(); |
jmasa@5007 | 449 | Metachunk* invalid_chunk = (Metachunk*) top(); |
jmasa@5007 | 450 | while (chunk < invalid_chunk ) { |
stefank@5941 | 451 | assert(chunk->is_tagged_free(), "Should be tagged free"); |
stefank@5941 | 452 | MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); |
stefank@5941 | 453 | chunk_manager->remove_chunk(chunk); |
stefank@5941 | 454 | assert(chunk->next() == NULL && |
stefank@5941 | 455 | chunk->prev() == NULL, |
stefank@5941 | 456 | "Was not removed from its list"); |
stefank@5941 | 457 | chunk = (Metachunk*) next; |
jmasa@5007 | 458 | } |
jmasa@5007 | 459 | } |
jmasa@5007 | 460 | |
jmasa@5007 | 461 | #ifdef ASSERT |
jmasa@5007 | 462 | uint VirtualSpaceNode::container_count_slow() { |
jmasa@5007 | 463 | uint count = 0; |
jmasa@5007 | 464 | Metachunk* chunk = first_chunk(); |
jmasa@5007 | 465 | Metachunk* invalid_chunk = (Metachunk*) top(); |
jmasa@5007 | 466 | while (chunk < invalid_chunk ) { |
jmasa@5007 | 467 | MetaWord* next = ((MetaWord*)chunk) + chunk->word_size(); |
jmasa@5007 | 468 | // Don't count the chunks on the free lists. Those are |
jmasa@5007 | 469 | // still part of the VirtualSpaceNode but not currently |
jmasa@5007 | 470 | // counted. |
stefank@5941 | 471 | if (!chunk->is_tagged_free()) { |
jmasa@5007 | 472 | count++; |
jmasa@5007 | 473 | } |
jmasa@5007 | 474 | chunk = (Metachunk*) next; |
jmasa@5007 | 475 | } |
jmasa@5007 | 476 | return count; |
jmasa@5007 | 477 | } |
jmasa@5007 | 478 | #endif |
jmasa@5007 | 479 | |
coleenp@4037 | 480 | // List of VirtualSpaces for metadata allocation. |
coleenp@4037 | 481 | class VirtualSpaceList : public CHeapObj<mtClass> { |
coleenp@4037 | 482 | friend class VirtualSpaceNode; |
coleenp@4037 | 483 | |
coleenp@4037 | 484 | enum VirtualSpaceSizes { |
coleenp@4037 | 485 | VirtualSpaceSize = 256 * K |
coleenp@4037 | 486 | }; |
coleenp@4037 | 487 | |
coleenp@4037 | 488 | // Head of the list |
coleenp@4037 | 489 | VirtualSpaceNode* _virtual_space_list; |
coleenp@4037 | 490 | // virtual space currently being used for allocations |
coleenp@4037 | 491 | VirtualSpaceNode* _current_virtual_space; |
coleenp@4037 | 492 | |
stefank@5863 | 493 | // Is this VirtualSpaceList used for the compressed class space |
coleenp@4037 | 494 | bool _is_class; |
coleenp@4037 | 495 | |
stefank@5704 | 496 | // Sum of reserved and committed memory in the virtual spaces |
stefank@5704 | 497 | size_t _reserved_words; |
stefank@5704 | 498 | size_t _committed_words; |
stefank@5704 | 499 | |
stefank@5704 | 500 | // Number of virtual spaces |
coleenp@4037 | 501 | size_t _virtual_space_count; |
coleenp@4037 | 502 | |
coleenp@4037 | 503 | ~VirtualSpaceList(); |
coleenp@4037 | 504 | |
coleenp@4037 | 505 | VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
coleenp@4037 | 506 | |
coleenp@4037 | 507 | void set_virtual_space_list(VirtualSpaceNode* v) { |
coleenp@4037 | 508 | _virtual_space_list = v; |
coleenp@4037 | 509 | } |
coleenp@4037 | 510 | void set_current_virtual_space(VirtualSpaceNode* v) { |
coleenp@4037 | 511 | _current_virtual_space = v; |
coleenp@4037 | 512 | } |
coleenp@4037 | 513 | |
stefank@5704 | 514 | void link_vs(VirtualSpaceNode* new_entry); |
coleenp@4037 | 515 | |
coleenp@4037 | 516 | // Get another virtual space and add it to the list. This |
coleenp@4037 | 517 | // is typically prompted by a failed attempt to allocate a chunk |
coleenp@4037 | 518 | // and is typically followed by the allocation of a chunk. |
stefank@5863 | 519 | bool create_new_virtual_space(size_t vs_word_size); |
coleenp@4037 | 520 | |
mgerdin@6004 | 521 | // Chunk up the unused committed space in the current |
mgerdin@6004 | 522 | // virtual space and add the chunks to the free list. |
mgerdin@6004 | 523 | void retire_current_virtual_space(); |
mgerdin@6004 | 524 | |
coleenp@4037 | 525 | public: |
coleenp@4037 | 526 | VirtualSpaceList(size_t word_size); |
coleenp@4037 | 527 | VirtualSpaceList(ReservedSpace rs); |
coleenp@4037 | 528 | |
jmasa@5015 | 529 | size_t free_bytes(); |
jmasa@5015 | 530 | |
jmasa@4382 | 531 | Metachunk* get_new_chunk(size_t word_size, |
jmasa@4382 | 532 | size_t grow_chunks_by_words, |
jmasa@4382 | 533 | size_t medium_chunk_bunch); |
jmasa@4382 | 534 | |
stefank@5863 | 535 | bool expand_node_by(VirtualSpaceNode* node, |
stefank@5863 | 536 | size_t min_words, |
stefank@5863 | 537 | size_t preferred_words); |
stefank@5863 | 538 | |
stefank@5863 | 539 | bool expand_by(size_t min_words, |
stefank@5863 | 540 | size_t preferred_words); |
coleenp@4037 | 541 | |
coleenp@4037 | 542 | VirtualSpaceNode* current_virtual_space() { |
coleenp@4037 | 543 | return _current_virtual_space; |
coleenp@4037 | 544 | } |
coleenp@4037 | 545 | |
coleenp@4037 | 546 | bool is_class() const { return _is_class; } |
coleenp@4037 | 547 | |
stefank@5863 | 548 | bool initialization_succeeded() { return _virtual_space_list != NULL; } |
coleenp@4037 | 549 | |
stefank@5704 | 550 | size_t reserved_words() { return _reserved_words; } |
stefank@5704 | 551 | size_t reserved_bytes() { return reserved_words() * BytesPerWord; } |
stefank@5704 | 552 | size_t committed_words() { return _committed_words; } |
stefank@5704 | 553 | size_t committed_bytes() { return committed_words() * BytesPerWord; } |
stefank@5704 | 554 | |
stefank@5704 | 555 | void inc_reserved_words(size_t v); |
stefank@5704 | 556 | void dec_reserved_words(size_t v); |
stefank@5704 | 557 | void inc_committed_words(size_t v); |
stefank@5704 | 558 | void dec_committed_words(size_t v); |
jmasa@5007 | 559 | void inc_virtual_space_count(); |
jmasa@5007 | 560 | void dec_virtual_space_count(); |
jmasa@5007 | 561 | |
coleenp@6678 | 562 | bool contains(const void* ptr); |
coleenp@6678 | 563 | |
jmasa@5007 | 564 | // Unlink empty VirtualSpaceNodes and free it. |
stefank@5771 | 565 | void purge(ChunkManager* chunk_manager); |
coleenp@4037 | 566 | |
coleenp@4037 | 567 | void print_on(outputStream* st) const; |
coleenp@4037 | 568 | |
coleenp@4037 | 569 | class VirtualSpaceListIterator : public StackObj { |
coleenp@4037 | 570 | VirtualSpaceNode* _virtual_spaces; |
coleenp@4037 | 571 | public: |
coleenp@4037 | 572 | VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
coleenp@4037 | 573 | _virtual_spaces(virtual_spaces) {} |
coleenp@4037 | 574 | |
coleenp@4037 | 575 | bool repeat() { |
coleenp@4037 | 576 | return _virtual_spaces != NULL; |
coleenp@4037 | 577 | } |
coleenp@4037 | 578 | |
coleenp@4037 | 579 | VirtualSpaceNode* get_next() { |
coleenp@4037 | 580 | VirtualSpaceNode* result = _virtual_spaces; |
coleenp@4037 | 581 | if (_virtual_spaces != NULL) { |
coleenp@4037 | 582 | _virtual_spaces = _virtual_spaces->next(); |
coleenp@4037 | 583 | } |
coleenp@4037 | 584 | return result; |
coleenp@4037 | 585 | } |
coleenp@4037 | 586 | }; |
coleenp@4037 | 587 | }; |
coleenp@4037 | 588 | |
coleenp@4037 | 589 | class Metadebug : AllStatic { |
coleenp@4037 | 590 | // Debugging support for Metaspaces |
coleenp@4037 | 591 | static int _allocation_fail_alot_count; |
coleenp@4037 | 592 | |
coleenp@4037 | 593 | public: |
coleenp@4037 | 594 | |
coleenp@4037 | 595 | static void init_allocation_fail_alot_count(); |
coleenp@4037 | 596 | #ifdef ASSERT |
coleenp@4037 | 597 | static bool test_metadata_failure(); |
coleenp@4037 | 598 | #endif |
coleenp@4037 | 599 | }; |
coleenp@4037 | 600 | |
coleenp@4037 | 601 | int Metadebug::_allocation_fail_alot_count = 0; |
coleenp@4037 | 602 | |
coleenp@4037 | 603 | // SpaceManager - used by Metaspace to handle allocations |
coleenp@4037 | 604 | class SpaceManager : public CHeapObj<mtClass> { |
coleenp@4037 | 605 | friend class Metaspace; |
coleenp@4037 | 606 | friend class Metadebug; |
coleenp@4037 | 607 | |
coleenp@4037 | 608 | private: |
jmasa@4382 | 609 | |
coleenp@6305 | 610 | // protects allocations |
coleenp@4037 | 611 | Mutex* const _lock; |
coleenp@4037 | 612 | |
jmasa@5162 | 613 | // Type of metadata allocated. |
jmasa@5162 | 614 | Metaspace::MetadataType _mdtype; |
jmasa@5162 | 615 | |
coleenp@4037 | 616 | // List of chunks in use by this SpaceManager. Allocations |
coleenp@4037 | 617 | // are done from the current chunk. The list is used for deallocating |
coleenp@4037 | 618 | // chunks when the SpaceManager is freed. |
jmasa@4196 | 619 | Metachunk* _chunks_in_use[NumberOfInUseLists]; |
coleenp@4037 | 620 | Metachunk* _current_chunk; |
coleenp@4037 | 621 | |
coleenp@4037 | 622 | // Number of small chunks to allocate to a manager |
coleenp@4037 | 623 | // If class space manager, small chunks are unlimited |
coleenp@4037 | 624 | static uint const _small_chunk_limit; |
coleenp@4037 | 625 | |
coleenp@4037 | 626 | // Sum of all space in allocated chunks |
jmasa@5015 | 627 | size_t _allocated_blocks_words; |
jmasa@5015 | 628 | |
jmasa@5015 | 629 | // Sum of all allocated chunks |
jmasa@5015 | 630 | size_t _allocated_chunks_words; |
jmasa@5015 | 631 | size_t _allocated_chunks_count; |
coleenp@4037 | 632 | |
coleenp@4037 | 633 | // Free lists of blocks are per SpaceManager since they |
coleenp@4037 | 634 | // are assumed to be in chunks in use by the SpaceManager |
coleenp@4037 | 635 | // and all chunks in use by a SpaceManager are freed when |
coleenp@4037 | 636 | // the class loader using the SpaceManager is collected. |
coleenp@4037 | 637 | BlockFreelist _block_freelists; |
coleenp@4037 | 638 | |
coleenp@4037 | 639 | // protects virtualspace and chunk expansions |
coleenp@4037 | 640 | static const char* _expand_lock_name; |
coleenp@4037 | 641 | static const int _expand_lock_rank; |
coleenp@4037 | 642 | static Mutex* const _expand_lock; |
coleenp@4037 | 643 | |
jmasa@4382 | 644 | private: |
coleenp@4037 | 645 | // Accessors |
coleenp@4037 | 646 | Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
coleenp@6305 | 647 | void set_chunks_in_use(ChunkIndex index, Metachunk* v) { |
coleenp@6305 | 648 | _chunks_in_use[index] = v; |
coleenp@6305 | 649 | } |
coleenp@4037 | 650 | |
coleenp@4037 | 651 | BlockFreelist* block_freelists() const { |
coleenp@4037 | 652 | return (BlockFreelist*) &_block_freelists; |
coleenp@4037 | 653 | } |
coleenp@4037 | 654 | |
jmasa@5162 | 655 | Metaspace::MetadataType mdtype() { return _mdtype; } |
stefank@5771 | 656 | |
stefank@5771 | 657 | VirtualSpaceList* vs_list() const { return Metaspace::get_space_list(_mdtype); } |
stefank@5771 | 658 | ChunkManager* chunk_manager() const { return Metaspace::get_chunk_manager(_mdtype); } |
coleenp@4037 | 659 | |
coleenp@4037 | 660 | Metachunk* current_chunk() const { return _current_chunk; } |
coleenp@4037 | 661 | void set_current_chunk(Metachunk* v) { |
coleenp@4037 | 662 | _current_chunk = v; |
coleenp@4037 | 663 | } |
coleenp@4037 | 664 | |
coleenp@4037 | 665 | Metachunk* find_current_chunk(size_t word_size); |
coleenp@4037 | 666 | |
coleenp@4037 | 667 | // Add chunk to the list of chunks in use |
coleenp@4037 | 668 | void add_chunk(Metachunk* v, bool make_current); |
mgerdin@5699 | 669 | void retire_current_chunk(); |
coleenp@4037 | 670 | |
coleenp@4037 | 671 | Mutex* lock() const { return _lock; } |
coleenp@4037 | 672 | |
jmasa@4382 | 673 | const char* chunk_size_name(ChunkIndex index) const; |
jmasa@4382 | 674 | |
jmasa@4382 | 675 | protected: |
jmasa@4382 | 676 | void initialize(); |
jmasa@4382 | 677 | |
coleenp@4037 | 678 | public: |
jmasa@5162 | 679 | SpaceManager(Metaspace::MetadataType mdtype, |
stefank@5771 | 680 | Mutex* lock); |
coleenp@4037 | 681 | ~SpaceManager(); |
coleenp@4037 | 682 | |
jmasa@4382 | 683 | enum ChunkMultiples { |
jmasa@4382 | 684 | MediumChunkMultiple = 4 |
coleenp@4037 | 685 | }; |
coleenp@4037 | 686 | |
stefank@5771 | 687 | bool is_class() { return _mdtype == Metaspace::ClassType; } |
stefank@5771 | 688 | |
coleenp@4037 | 689 | // Accessors |
mgerdin@6004 | 690 | size_t specialized_chunk_size() { return (size_t) is_class() ? ClassSpecializedChunk : SpecializedChunk; } |
mgerdin@6004 | 691 | size_t small_chunk_size() { return (size_t) is_class() ? ClassSmallChunk : SmallChunk; } |
mgerdin@6004 | 692 | size_t medium_chunk_size() { return (size_t) is_class() ? ClassMediumChunk : MediumChunk; } |
mgerdin@6004 | 693 | size_t medium_chunk_bunch() { return medium_chunk_size() * MediumChunkMultiple; } |
mgerdin@6004 | 694 | |
mgerdin@6004 | 695 | size_t smallest_chunk_size() { return specialized_chunk_size(); } |
jmasa@4382 | 696 | |
jmasa@5015 | 697 | size_t allocated_blocks_words() const { return _allocated_blocks_words; } |
jmasa@5015 | 698 | size_t allocated_blocks_bytes() const { return _allocated_blocks_words * BytesPerWord; } |
jmasa@5015 | 699 | size_t allocated_chunks_words() const { return _allocated_chunks_words; } |
jmasa@5015 | 700 | size_t allocated_chunks_count() const { return _allocated_chunks_count; } |
jmasa@5015 | 701 | |
jmasa@4382 | 702 | bool is_humongous(size_t word_size) { return word_size > medium_chunk_size(); } |
coleenp@4037 | 703 | |
coleenp@4037 | 704 | static Mutex* expand_lock() { return _expand_lock; } |
coleenp@4037 | 705 | |
jmasa@5015 | 706 | // Increment the per Metaspace and global running sums for Metachunks |
jmasa@5015 | 707 | // by the given size. This is used when a Metachunk to added to |
jmasa@5015 | 708 | // the in-use list. |
jmasa@5015 | 709 | void inc_size_metrics(size_t words); |
jmasa@5015 | 710 | // Increment the per Metaspace and global running sums Metablocks by the given |
jmasa@5015 | 711 | // size. This is used when a Metablock is allocated. |
jmasa@5015 | 712 | void inc_used_metrics(size_t words); |
jmasa@5015 | 713 | // Delete the portion of the running sums for this SpaceManager. That is, |
jmasa@5015 | 714 | // the globals running sums for the Metachunks and Metablocks are |
jmasa@5015 | 715 | // decremented for all the Metachunks in-use by this SpaceManager. |
jmasa@5015 | 716 | void dec_total_from_size_metrics(); |
jmasa@5015 | 717 | |
jmasa@4382 | 718 | // Set the sizes for the initial chunks. |
jmasa@4382 | 719 | void get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
jmasa@4382 | 720 | size_t* chunk_word_size, |
jmasa@4382 | 721 | size_t* class_chunk_word_size); |
jmasa@4382 | 722 | |
coleenp@4037 | 723 | size_t sum_capacity_in_chunks_in_use() const; |
coleenp@4037 | 724 | size_t sum_used_in_chunks_in_use() const; |
coleenp@4037 | 725 | size_t sum_free_in_chunks_in_use() const; |
coleenp@4037 | 726 | size_t sum_waste_in_chunks_in_use() const; |
coleenp@4037 | 727 | size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
coleenp@4037 | 728 | |
coleenp@4037 | 729 | size_t sum_count_in_chunks_in_use(); |
coleenp@4037 | 730 | size_t sum_count_in_chunks_in_use(ChunkIndex i); |
coleenp@4037 | 731 | |
jmasa@4382 | 732 | Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
jmasa@4382 | 733 | |
coleenp@4037 | 734 | // Block allocation and deallocation. |
coleenp@4037 | 735 | // Allocates a block from the current chunk |
coleenp@4037 | 736 | MetaWord* allocate(size_t word_size); |
coleenp@4037 | 737 | |
coleenp@4037 | 738 | // Helper for allocations |
jmasa@4196 | 739 | MetaWord* allocate_work(size_t word_size); |
coleenp@4037 | 740 | |
coleenp@4037 | 741 | // Returns a block to the per manager freelist |
jmasa@4196 | 742 | void deallocate(MetaWord* p, size_t word_size); |
coleenp@4037 | 743 | |
coleenp@4037 | 744 | // Based on the allocation size and a minimum chunk size, |
coleenp@4037 | 745 | // returned chunk size (for expanding space for chunk allocation). |
coleenp@4037 | 746 | size_t calc_chunk_size(size_t allocation_word_size); |
coleenp@4037 | 747 | |
coleenp@4037 | 748 | // Called when an allocation from the current chunk fails. |
coleenp@4037 | 749 | // Gets a new chunk (may require getting a new virtual space), |
coleenp@4037 | 750 | // and allocates from that chunk. |
jmasa@4196 | 751 | MetaWord* grow_and_allocate(size_t word_size); |
coleenp@4037 | 752 | |
stefank@5864 | 753 | // Notify memory usage to MemoryService. |
stefank@5864 | 754 | void track_metaspace_memory_usage(); |
stefank@5864 | 755 | |
coleenp@4037 | 756 | // debugging support. |
coleenp@4037 | 757 | |
coleenp@4037 | 758 | void dump(outputStream* const out) const; |
coleenp@4037 | 759 | void print_on(outputStream* st) const; |
coleenp@4037 | 760 | void locked_print_chunks_in_use_on(outputStream* st) const; |
coleenp@4037 | 761 | |
coleenp@4037 | 762 | void verify(); |
jmasa@4327 | 763 | void verify_chunk_size(Metachunk* chunk); |
coleenp@4304 | 764 | NOT_PRODUCT(void mangle_freed_chunks();) |
coleenp@4037 | 765 | #ifdef ASSERT |
jmasa@5015 | 766 | void verify_allocated_blocks_words(); |
coleenp@4037 | 767 | #endif |
iklam@5208 | 768 | |
iklam@5208 | 769 | size_t get_raw_word_size(size_t word_size) { |
iklam@5208 | 770 | size_t byte_size = word_size * BytesPerWord; |
iklam@5208 | 771 | |
stefank@5941 | 772 | size_t raw_bytes_size = MAX2(byte_size, sizeof(Metablock)); |
stefank@5941 | 773 | raw_bytes_size = align_size_up(raw_bytes_size, Metachunk::object_alignment()); |
stefank@5941 | 774 | |
iklam@5208 | 775 | size_t raw_word_size = raw_bytes_size / BytesPerWord; |
iklam@5208 | 776 | assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
iklam@5208 | 777 | |
iklam@5208 | 778 | return raw_word_size; |
iklam@5208 | 779 | } |
coleenp@4037 | 780 | }; |
coleenp@4037 | 781 | |
coleenp@4037 | 782 | uint const SpaceManager::_small_chunk_limit = 4; |
coleenp@4037 | 783 | |
coleenp@4037 | 784 | const char* SpaceManager::_expand_lock_name = |
coleenp@4037 | 785 | "SpaceManager chunk allocation lock"; |
coleenp@4037 | 786 | const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
coleenp@4037 | 787 | Mutex* const SpaceManager::_expand_lock = |
coleenp@4037 | 788 | new Mutex(SpaceManager::_expand_lock_rank, |
coleenp@4037 | 789 | SpaceManager::_expand_lock_name, |
coleenp@4037 | 790 | Mutex::_allow_vm_block_flag); |
coleenp@4037 | 791 | |
jmasa@5007 | 792 | void VirtualSpaceNode::inc_container_count() { |
jmasa@5007 | 793 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 794 | _container_count++; |
jmasa@5007 | 795 | assert(_container_count == container_count_slow(), |
jmasa@5007 | 796 | err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT |
stefank@5771 | 797 | " container_count_slow() " SIZE_FORMAT, |
jmasa@5007 | 798 | _container_count, container_count_slow())); |
jmasa@5007 | 799 | } |
jmasa@5007 | 800 | |
jmasa@5007 | 801 | void VirtualSpaceNode::dec_container_count() { |
jmasa@5007 | 802 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 803 | _container_count--; |
jmasa@5007 | 804 | } |
jmasa@5007 | 805 | |
jmasa@5007 | 806 | #ifdef ASSERT |
jmasa@5007 | 807 | void VirtualSpaceNode::verify_container_count() { |
jmasa@5007 | 808 | assert(_container_count == container_count_slow(), |
jmasa@5007 | 809 | err_msg("Inconsistency in countainer_count _container_count " SIZE_FORMAT |
stefank@5771 | 810 | " container_count_slow() " SIZE_FORMAT, _container_count, container_count_slow())); |
jmasa@5007 | 811 | } |
jmasa@5007 | 812 | #endif |
jmasa@5007 | 813 | |
coleenp@4037 | 814 | // BlockFreelist methods |
coleenp@4037 | 815 | |
coleenp@4037 | 816 | BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
coleenp@4037 | 817 | |
coleenp@4037 | 818 | BlockFreelist::~BlockFreelist() { |
coleenp@4037 | 819 | if (_dictionary != NULL) { |
coleenp@4037 | 820 | if (Verbose && TraceMetadataChunkAllocation) { |
coleenp@4037 | 821 | _dictionary->print_free_lists(gclog_or_tty); |
coleenp@4037 | 822 | } |
coleenp@4037 | 823 | delete _dictionary; |
coleenp@4037 | 824 | } |
coleenp@4037 | 825 | } |
coleenp@4037 | 826 | |
jmasa@4196 | 827 | void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
stefank@5941 | 828 | Metablock* free_chunk = ::new (p) Metablock(word_size); |
coleenp@4037 | 829 | if (dictionary() == NULL) { |
jmasa@4196 | 830 | _dictionary = new BlockTreeDictionary(); |
coleenp@4037 | 831 | } |
jmasa@4196 | 832 | dictionary()->return_chunk(free_chunk); |
coleenp@4037 | 833 | } |
coleenp@4037 | 834 | |
jmasa@4196 | 835 | MetaWord* BlockFreelist::get_block(size_t word_size) { |
coleenp@4037 | 836 | if (dictionary() == NULL) { |
coleenp@4037 | 837 | return NULL; |
coleenp@4037 | 838 | } |
coleenp@4037 | 839 | |
goetz@6337 | 840 | if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
jmasa@4196 | 841 | // Dark matter. Too small for dictionary. |
coleenp@4037 | 842 | return NULL; |
coleenp@4037 | 843 | } |
jmasa@4196 | 844 | |
jmasa@4196 | 845 | Metablock* free_block = |
mgerdin@5699 | 846 | dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::atLeast); |
jmasa@4196 | 847 | if (free_block == NULL) { |
jmasa@4196 | 848 | return NULL; |
jmasa@4196 | 849 | } |
jmasa@4196 | 850 | |
mgerdin@5699 | 851 | const size_t block_size = free_block->size(); |
mgerdin@5699 | 852 | if (block_size > WasteMultiplier * word_size) { |
mgerdin@5699 | 853 | return_block((MetaWord*)free_block, block_size); |
mgerdin@5699 | 854 | return NULL; |
mgerdin@5699 | 855 | } |
mgerdin@5699 | 856 | |
mgerdin@5699 | 857 | MetaWord* new_block = (MetaWord*)free_block; |
mgerdin@5699 | 858 | assert(block_size >= word_size, "Incorrect size of block from freelist"); |
mgerdin@5699 | 859 | const size_t unused = block_size - word_size; |
goetz@6337 | 860 | if (unused >= TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
mgerdin@5699 | 861 | return_block(new_block + word_size, unused); |
mgerdin@5699 | 862 | } |
mgerdin@5699 | 863 | |
mgerdin@5699 | 864 | return new_block; |
coleenp@4037 | 865 | } |
coleenp@4037 | 866 | |
coleenp@4037 | 867 | void BlockFreelist::print_on(outputStream* st) const { |
coleenp@4037 | 868 | if (dictionary() == NULL) { |
coleenp@4037 | 869 | return; |
coleenp@4037 | 870 | } |
coleenp@4037 | 871 | dictionary()->print_free_lists(st); |
coleenp@4037 | 872 | } |
coleenp@4037 | 873 | |
coleenp@4037 | 874 | // VirtualSpaceNode methods |
coleenp@4037 | 875 | |
coleenp@4037 | 876 | VirtualSpaceNode::~VirtualSpaceNode() { |
coleenp@4037 | 877 | _rs.release(); |
jmasa@5007 | 878 | #ifdef ASSERT |
jmasa@5007 | 879 | size_t word_size = sizeof(*this) / BytesPerWord; |
jmasa@5007 | 880 | Copy::fill_to_words((HeapWord*) this, word_size, 0xf1f1f1f1); |
jmasa@5007 | 881 | #endif |
coleenp@4037 | 882 | } |
coleenp@4037 | 883 | |
coleenp@4037 | 884 | size_t VirtualSpaceNode::used_words_in_vs() const { |
coleenp@4037 | 885 | return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 886 | } |
coleenp@4037 | 887 | |
coleenp@4037 | 888 | // Space committed in the VirtualSpace |
coleenp@4037 | 889 | size_t VirtualSpaceNode::capacity_words_in_vs() const { |
coleenp@4037 | 890 | return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 891 | } |
coleenp@4037 | 892 | |
jmasa@5015 | 893 | size_t VirtualSpaceNode::free_words_in_vs() const { |
jmasa@5015 | 894 | return pointer_delta(end(), top(), sizeof(MetaWord)); |
jmasa@5015 | 895 | } |
coleenp@4037 | 896 | |
coleenp@4037 | 897 | // Allocates the chunk from the virtual space only. |
coleenp@4037 | 898 | // This interface is also used internally for debugging. Not all |
coleenp@4037 | 899 | // chunks removed here are necessarily used for allocation. |
coleenp@4037 | 900 | Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
coleenp@4037 | 901 | // Bottom of the new chunk |
coleenp@4037 | 902 | MetaWord* chunk_limit = top(); |
coleenp@4037 | 903 | assert(chunk_limit != NULL, "Not safe to call this method"); |
coleenp@4037 | 904 | |
stefank@5863 | 905 | // The virtual spaces are always expanded by the |
stefank@5863 | 906 | // commit granularity to enforce the following condition. |
stefank@5863 | 907 | // Without this the is_available check will not work correctly. |
stefank@5863 | 908 | assert(_virtual_space.committed_size() == _virtual_space.actual_committed_size(), |
stefank@5863 | 909 | "The committed memory doesn't match the expanded memory."); |
stefank@5863 | 910 | |
coleenp@4037 | 911 | if (!is_available(chunk_word_size)) { |
coleenp@4037 | 912 | if (TraceMetadataChunkAllocation) { |
stefank@5708 | 913 | gclog_or_tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
coleenp@4037 | 914 | // Dump some information about the virtual space that is nearly full |
stefank@5708 | 915 | print_on(gclog_or_tty); |
coleenp@4037 | 916 | } |
coleenp@4037 | 917 | return NULL; |
coleenp@4037 | 918 | } |
coleenp@4037 | 919 | |
coleenp@4037 | 920 | // Take the space (bump top on the current virtual space). |
coleenp@4037 | 921 | inc_top(chunk_word_size); |
coleenp@4037 | 922 | |
jmasa@5007 | 923 | // Initialize the chunk |
jmasa@5007 | 924 | Metachunk* result = ::new (chunk_limit) Metachunk(chunk_word_size, this); |
coleenp@4037 | 925 | return result; |
coleenp@4037 | 926 | } |
coleenp@4037 | 927 | |
coleenp@4037 | 928 | |
coleenp@4037 | 929 | // Expand the virtual space (commit more of the reserved space) |
stefank@5863 | 930 | bool VirtualSpaceNode::expand_by(size_t min_words, size_t preferred_words) { |
stefank@5863 | 931 | size_t min_bytes = min_words * BytesPerWord; |
stefank@5863 | 932 | size_t preferred_bytes = preferred_words * BytesPerWord; |
stefank@5863 | 933 | |
stefank@5863 | 934 | size_t uncommitted = virtual_space()->reserved_size() - virtual_space()->actual_committed_size(); |
stefank@5863 | 935 | |
stefank@5863 | 936 | if (uncommitted < min_bytes) { |
stefank@5863 | 937 | return false; |
coleenp@4037 | 938 | } |
stefank@5863 | 939 | |
stefank@5863 | 940 | size_t commit = MIN2(preferred_bytes, uncommitted); |
stefank@5863 | 941 | bool result = virtual_space()->expand_by(commit, false); |
stefank@5863 | 942 | |
stefank@5863 | 943 | assert(result, "Failed to commit memory"); |
stefank@5863 | 944 | |
coleenp@4037 | 945 | return result; |
coleenp@4037 | 946 | } |
coleenp@4037 | 947 | |
coleenp@4037 | 948 | Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
coleenp@4037 | 949 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 950 | Metachunk* result = take_from_committed(chunk_word_size); |
jmasa@5007 | 951 | if (result != NULL) { |
jmasa@5007 | 952 | inc_container_count(); |
jmasa@5007 | 953 | } |
jmasa@5007 | 954 | return result; |
coleenp@4037 | 955 | } |
coleenp@4037 | 956 | |
coleenp@4037 | 957 | bool VirtualSpaceNode::initialize() { |
coleenp@4037 | 958 | |
coleenp@4037 | 959 | if (!_rs.is_reserved()) { |
coleenp@4037 | 960 | return false; |
coleenp@4037 | 961 | } |
coleenp@4037 | 962 | |
stefank@5863 | 963 | // These are necessary restriction to make sure that the virtual space always |
stefank@5863 | 964 | // grows in steps of Metaspace::commit_alignment(). If both base and size are |
stefank@5863 | 965 | // aligned only the middle alignment of the VirtualSpace is used. |
stefank@5863 | 966 | assert_is_ptr_aligned(_rs.base(), Metaspace::commit_alignment()); |
stefank@5863 | 967 | assert_is_size_aligned(_rs.size(), Metaspace::commit_alignment()); |
stefank@5863 | 968 | |
stefank@5863 | 969 | // ReservedSpaces marked as special will have the entire memory |
stefank@5863 | 970 | // pre-committed. Setting a committed size will make sure that |
stefank@5863 | 971 | // committed_size and actual_committed_size agrees. |
stefank@5863 | 972 | size_t pre_committed_size = _rs.special() ? _rs.size() : 0; |
stefank@5863 | 973 | |
stefank@5863 | 974 | bool result = virtual_space()->initialize_with_granularity(_rs, pre_committed_size, |
stefank@5863 | 975 | Metaspace::commit_alignment()); |
coleenp@4037 | 976 | if (result) { |
stefank@5863 | 977 | assert(virtual_space()->committed_size() == virtual_space()->actual_committed_size(), |
stefank@5863 | 978 | "Checking that the pre-committed memory was registered by the VirtualSpace"); |
stefank@5863 | 979 | |
coleenp@4037 | 980 | set_top((MetaWord*)virtual_space()->low()); |
coleenp@4037 | 981 | set_reserved(MemRegion((HeapWord*)_rs.base(), |
coleenp@4037 | 982 | (HeapWord*)(_rs.base() + _rs.size()))); |
coleenp@4038 | 983 | |
coleenp@4038 | 984 | assert(reserved()->start() == (HeapWord*) _rs.base(), |
coleenp@4038 | 985 | err_msg("Reserved start was not set properly " PTR_FORMAT |
coleenp@4038 | 986 | " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
coleenp@4038 | 987 | assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
coleenp@4038 | 988 | err_msg("Reserved size was not set properly " SIZE_FORMAT |
coleenp@4038 | 989 | " != " SIZE_FORMAT, reserved()->word_size(), |
coleenp@4038 | 990 | _rs.size() / BytesPerWord)); |
coleenp@4037 | 991 | } |
coleenp@4037 | 992 | |
coleenp@4037 | 993 | return result; |
coleenp@4037 | 994 | } |
coleenp@4037 | 995 | |
coleenp@4037 | 996 | void VirtualSpaceNode::print_on(outputStream* st) const { |
coleenp@4037 | 997 | size_t used = used_words_in_vs(); |
coleenp@4037 | 998 | size_t capacity = capacity_words_in_vs(); |
coleenp@4037 | 999 | VirtualSpace* vs = virtual_space(); |
coleenp@4037 | 1000 | st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
coleenp@4037 | 1001 | "[" PTR_FORMAT ", " PTR_FORMAT ", " |
coleenp@4037 | 1002 | PTR_FORMAT ", " PTR_FORMAT ")", |
jmasa@4382 | 1003 | vs, capacity / K, |
jmasa@4382 | 1004 | capacity == 0 ? 0 : used * 100 / capacity, |
coleenp@4037 | 1005 | bottom(), top(), end(), |
coleenp@4037 | 1006 | vs->high_boundary()); |
coleenp@4037 | 1007 | } |
coleenp@4037 | 1008 | |
coleenp@4304 | 1009 | #ifdef ASSERT |
coleenp@4037 | 1010 | void VirtualSpaceNode::mangle() { |
coleenp@4037 | 1011 | size_t word_size = capacity_words_in_vs(); |
coleenp@4037 | 1012 | Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
coleenp@4037 | 1013 | } |
coleenp@4304 | 1014 | #endif // ASSERT |
coleenp@4037 | 1015 | |
coleenp@4037 | 1016 | // VirtualSpaceList methods |
coleenp@4037 | 1017 | // Space allocated from the VirtualSpace |
coleenp@4037 | 1018 | |
coleenp@4037 | 1019 | VirtualSpaceList::~VirtualSpaceList() { |
coleenp@4037 | 1020 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 1021 | while (iter.repeat()) { |
coleenp@4037 | 1022 | VirtualSpaceNode* vsl = iter.get_next(); |
coleenp@4037 | 1023 | delete vsl; |
coleenp@4037 | 1024 | } |
coleenp@4037 | 1025 | } |
coleenp@4037 | 1026 | |
stefank@5704 | 1027 | void VirtualSpaceList::inc_reserved_words(size_t v) { |
jmasa@5007 | 1028 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 1029 | _reserved_words = _reserved_words + v; |
jmasa@5007 | 1030 | } |
stefank@5704 | 1031 | void VirtualSpaceList::dec_reserved_words(size_t v) { |
jmasa@5007 | 1032 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 1033 | _reserved_words = _reserved_words - v; |
stefank@5704 | 1034 | } |
stefank@5704 | 1035 | |
stefank@5863 | 1036 | #define assert_committed_below_limit() \ |
stefank@5863 | 1037 | assert(MetaspaceAux::committed_bytes() <= MaxMetaspaceSize, \ |
stefank@5863 | 1038 | err_msg("Too much committed memory. Committed: " SIZE_FORMAT \ |
stefank@5863 | 1039 | " limit (MaxMetaspaceSize): " SIZE_FORMAT, \ |
stefank@5863 | 1040 | MetaspaceAux::committed_bytes(), MaxMetaspaceSize)); |
stefank@5863 | 1041 | |
stefank@5704 | 1042 | void VirtualSpaceList::inc_committed_words(size_t v) { |
stefank@5704 | 1043 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 1044 | _committed_words = _committed_words + v; |
stefank@5863 | 1045 | |
stefank@5863 | 1046 | assert_committed_below_limit(); |
stefank@5704 | 1047 | } |
stefank@5704 | 1048 | void VirtualSpaceList::dec_committed_words(size_t v) { |
stefank@5704 | 1049 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5704 | 1050 | _committed_words = _committed_words - v; |
stefank@5863 | 1051 | |
stefank@5863 | 1052 | assert_committed_below_limit(); |
jmasa@5007 | 1053 | } |
jmasa@5007 | 1054 | |
jmasa@5007 | 1055 | void VirtualSpaceList::inc_virtual_space_count() { |
jmasa@5007 | 1056 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 1057 | _virtual_space_count++; |
jmasa@5007 | 1058 | } |
jmasa@5007 | 1059 | void VirtualSpaceList::dec_virtual_space_count() { |
jmasa@5007 | 1060 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 1061 | _virtual_space_count--; |
jmasa@5007 | 1062 | } |
jmasa@5007 | 1063 | |
jmasa@5007 | 1064 | void ChunkManager::remove_chunk(Metachunk* chunk) { |
jmasa@5007 | 1065 | size_t word_size = chunk->word_size(); |
jmasa@5007 | 1066 | ChunkIndex index = list_index(word_size); |
jmasa@5007 | 1067 | if (index != HumongousIndex) { |
jmasa@5007 | 1068 | free_chunks(index)->remove_chunk(chunk); |
jmasa@5007 | 1069 | } else { |
jmasa@5007 | 1070 | humongous_dictionary()->remove_chunk(chunk); |
jmasa@5007 | 1071 | } |
jmasa@5007 | 1072 | |
jmasa@5007 | 1073 | // Chunk is being removed from the chunks free list. |
stefank@5941 | 1074 | dec_free_chunks_total(chunk->word_size()); |
jmasa@5007 | 1075 | } |
jmasa@5007 | 1076 | |
jmasa@5007 | 1077 | // Walk the list of VirtualSpaceNodes and delete |
jmasa@5007 | 1078 | // nodes with a 0 container_count. Remove Metachunks in |
jmasa@5007 | 1079 | // the node from their respective freelists. |
stefank@5771 | 1080 | void VirtualSpaceList::purge(ChunkManager* chunk_manager) { |
coleenp@6678 | 1081 | assert(SafepointSynchronize::is_at_safepoint(), "must be called at safepoint for contains to work"); |
jmasa@5007 | 1082 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5007 | 1083 | // Don't use a VirtualSpaceListIterator because this |
jmasa@5007 | 1084 | // list is being changed and a straightforward use of an iterator is not safe. |
jmasa@5007 | 1085 | VirtualSpaceNode* purged_vsl = NULL; |
jmasa@5007 | 1086 | VirtualSpaceNode* prev_vsl = virtual_space_list(); |
jmasa@5007 | 1087 | VirtualSpaceNode* next_vsl = prev_vsl; |
jmasa@5007 | 1088 | while (next_vsl != NULL) { |
jmasa@5007 | 1089 | VirtualSpaceNode* vsl = next_vsl; |
jmasa@5007 | 1090 | next_vsl = vsl->next(); |
jmasa@5007 | 1091 | // Don't free the current virtual space since it will likely |
jmasa@5007 | 1092 | // be needed soon. |
jmasa@5007 | 1093 | if (vsl->container_count() == 0 && vsl != current_virtual_space()) { |
jmasa@5007 | 1094 | // Unlink it from the list |
jmasa@5007 | 1095 | if (prev_vsl == vsl) { |
stefank@5863 | 1096 | // This is the case of the current node being the first node. |
stefank@5863 | 1097 | assert(vsl == virtual_space_list(), "Expected to be the first node"); |
jmasa@5007 | 1098 | set_virtual_space_list(vsl->next()); |
jmasa@5007 | 1099 | } else { |
jmasa@5007 | 1100 | prev_vsl->set_next(vsl->next()); |
jmasa@5007 | 1101 | } |
jmasa@5007 | 1102 | |
stefank@5771 | 1103 | vsl->purge(chunk_manager); |
stefank@5704 | 1104 | dec_reserved_words(vsl->reserved_words()); |
stefank@5704 | 1105 | dec_committed_words(vsl->committed_words()); |
jmasa@5007 | 1106 | dec_virtual_space_count(); |
jmasa@5007 | 1107 | purged_vsl = vsl; |
jmasa@5007 | 1108 | delete vsl; |
jmasa@5007 | 1109 | } else { |
jmasa@5007 | 1110 | prev_vsl = vsl; |
jmasa@5007 | 1111 | } |
jmasa@5007 | 1112 | } |
jmasa@5007 | 1113 | #ifdef ASSERT |
jmasa@5007 | 1114 | if (purged_vsl != NULL) { |
coleenp@6678 | 1115 | // List should be stable enough to use an iterator here. |
coleenp@6678 | 1116 | VirtualSpaceListIterator iter(virtual_space_list()); |
jmasa@5007 | 1117 | while (iter.repeat()) { |
jmasa@5007 | 1118 | VirtualSpaceNode* vsl = iter.get_next(); |
jmasa@5007 | 1119 | assert(vsl != purged_vsl, "Purge of vsl failed"); |
jmasa@5007 | 1120 | } |
jmasa@5007 | 1121 | } |
jmasa@5007 | 1122 | #endif |
jmasa@5007 | 1123 | } |
jmasa@5007 | 1124 | |
coleenp@6678 | 1125 | |
coleenp@6678 | 1126 | // This function looks at the mmap regions in the metaspace without locking. |
coleenp@6678 | 1127 | // The chunks are added with store ordering and not deleted except for at |
coleenp@6678 | 1128 | // unloading time during a safepoint. |
coleenp@6678 | 1129 | bool VirtualSpaceList::contains(const void* ptr) { |
coleenp@6678 | 1130 | // List should be stable enough to use an iterator here because removing virtual |
coleenp@6678 | 1131 | // space nodes is only allowed at a safepoint. |
coleenp@6678 | 1132 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@6678 | 1133 | while (iter.repeat()) { |
coleenp@6678 | 1134 | VirtualSpaceNode* vsn = iter.get_next(); |
coleenp@6678 | 1135 | if (vsn->contains(ptr)) { |
coleenp@6678 | 1136 | return true; |
coleenp@6678 | 1137 | } |
coleenp@6678 | 1138 | } |
coleenp@6678 | 1139 | return false; |
coleenp@6678 | 1140 | } |
coleenp@6678 | 1141 | |
mgerdin@6004 | 1142 | void VirtualSpaceList::retire_current_virtual_space() { |
mgerdin@6004 | 1143 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@6004 | 1144 | |
mgerdin@6004 | 1145 | VirtualSpaceNode* vsn = current_virtual_space(); |
mgerdin@6004 | 1146 | |
mgerdin@6004 | 1147 | ChunkManager* cm = is_class() ? Metaspace::chunk_manager_class() : |
mgerdin@6004 | 1148 | Metaspace::chunk_manager_metadata(); |
mgerdin@6004 | 1149 | |
mgerdin@6004 | 1150 | vsn->retire(cm); |
mgerdin@6004 | 1151 | } |
mgerdin@6004 | 1152 | |
mgerdin@6004 | 1153 | void VirtualSpaceNode::retire(ChunkManager* chunk_manager) { |
mgerdin@6004 | 1154 | for (int i = (int)MediumIndex; i >= (int)ZeroIndex; --i) { |
mgerdin@6004 | 1155 | ChunkIndex index = (ChunkIndex)i; |
mgerdin@6004 | 1156 | size_t chunk_size = chunk_manager->free_chunks(index)->size(); |
mgerdin@6004 | 1157 | |
mgerdin@6004 | 1158 | while (free_words_in_vs() >= chunk_size) { |
mgerdin@6004 | 1159 | DEBUG_ONLY(verify_container_count();) |
mgerdin@6004 | 1160 | Metachunk* chunk = get_chunk_vs(chunk_size); |
mgerdin@6004 | 1161 | assert(chunk != NULL, "allocation should have been successful"); |
mgerdin@6004 | 1162 | |
mgerdin@6004 | 1163 | chunk_manager->return_chunks(index, chunk); |
mgerdin@6004 | 1164 | chunk_manager->inc_free_chunks_total(chunk_size); |
mgerdin@6004 | 1165 | DEBUG_ONLY(verify_container_count();) |
mgerdin@6004 | 1166 | } |
mgerdin@6004 | 1167 | } |
mgerdin@6004 | 1168 | assert(free_words_in_vs() == 0, "should be empty now"); |
mgerdin@6004 | 1169 | } |
mgerdin@6004 | 1170 | |
stefank@5863 | 1171 | VirtualSpaceList::VirtualSpaceList(size_t word_size) : |
coleenp@4037 | 1172 | _is_class(false), |
coleenp@4037 | 1173 | _virtual_space_list(NULL), |
coleenp@4037 | 1174 | _current_virtual_space(NULL), |
stefank@5704 | 1175 | _reserved_words(0), |
stefank@5704 | 1176 | _committed_words(0), |
coleenp@4037 | 1177 | _virtual_space_count(0) { |
coleenp@4037 | 1178 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1179 | Mutex::_no_safepoint_check_flag); |
stefank@5863 | 1180 | create_new_virtual_space(word_size); |
coleenp@4037 | 1181 | } |
coleenp@4037 | 1182 | |
coleenp@4037 | 1183 | VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
coleenp@4037 | 1184 | _is_class(true), |
coleenp@4037 | 1185 | _virtual_space_list(NULL), |
coleenp@4037 | 1186 | _current_virtual_space(NULL), |
stefank@5704 | 1187 | _reserved_words(0), |
stefank@5704 | 1188 | _committed_words(0), |
coleenp@4037 | 1189 | _virtual_space_count(0) { |
coleenp@4037 | 1190 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1191 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1192 | VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
coleenp@4037 | 1193 | bool succeeded = class_entry->initialize(); |
stefank@5863 | 1194 | if (succeeded) { |
stefank@5863 | 1195 | link_vs(class_entry); |
stefank@5863 | 1196 | } |
coleenp@4037 | 1197 | } |
coleenp@4037 | 1198 | |
jmasa@5015 | 1199 | size_t VirtualSpaceList::free_bytes() { |
jmasa@5015 | 1200 | return virtual_space_list()->free_words_in_vs() * BytesPerWord; |
jmasa@5015 | 1201 | } |
jmasa@5015 | 1202 | |
coleenp@4037 | 1203 | // Allocate another meta virtual space and add it to the list. |
stefank@5863 | 1204 | bool VirtualSpaceList::create_new_virtual_space(size_t vs_word_size) { |
coleenp@4037 | 1205 | assert_lock_strong(SpaceManager::expand_lock()); |
stefank@5863 | 1206 | |
stefank@5863 | 1207 | if (is_class()) { |
stefank@5863 | 1208 | assert(false, "We currently don't support more than one VirtualSpace for" |
stefank@5863 | 1209 | " the compressed class space. The initialization of the" |
stefank@5863 | 1210 | " CCS uses another code path and should not hit this path."); |
coleenp@4037 | 1211 | return false; |
coleenp@4037 | 1212 | } |
stefank@5863 | 1213 | |
stefank@5863 | 1214 | if (vs_word_size == 0) { |
stefank@5863 | 1215 | assert(false, "vs_word_size should always be at least _reserve_alignment large."); |
stefank@5863 | 1216 | return false; |
stefank@5863 | 1217 | } |
stefank@5863 | 1218 | |
coleenp@4037 | 1219 | // Reserve the space |
coleenp@4037 | 1220 | size_t vs_byte_size = vs_word_size * BytesPerWord; |
stefank@5863 | 1221 | assert_is_size_aligned(vs_byte_size, Metaspace::reserve_alignment()); |
coleenp@4037 | 1222 | |
coleenp@4037 | 1223 | // Allocate the meta virtual space and initialize it. |
coleenp@4037 | 1224 | VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
coleenp@4037 | 1225 | if (!new_entry->initialize()) { |
coleenp@4037 | 1226 | delete new_entry; |
coleenp@4037 | 1227 | return false; |
coleenp@4037 | 1228 | } else { |
stefank@5863 | 1229 | assert(new_entry->reserved_words() == vs_word_size, |
stefank@5863 | 1230 | "Reserved memory size differs from requested memory size"); |
coleenp@6678 | 1231 | // ensure lock-free iteration sees fully initialized node |
coleenp@6678 | 1232 | OrderAccess::storestore(); |
stefank@5704 | 1233 | link_vs(new_entry); |
coleenp@4037 | 1234 | return true; |
coleenp@4037 | 1235 | } |
coleenp@4037 | 1236 | } |
coleenp@4037 | 1237 | |
stefank@5704 | 1238 | void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry) { |
coleenp@4037 | 1239 | if (virtual_space_list() == NULL) { |
coleenp@4037 | 1240 | set_virtual_space_list(new_entry); |
coleenp@4037 | 1241 | } else { |
coleenp@4037 | 1242 | current_virtual_space()->set_next(new_entry); |
coleenp@4037 | 1243 | } |
coleenp@4037 | 1244 | set_current_virtual_space(new_entry); |
stefank@5704 | 1245 | inc_reserved_words(new_entry->reserved_words()); |
stefank@5704 | 1246 | inc_committed_words(new_entry->committed_words()); |
coleenp@4037 | 1247 | inc_virtual_space_count(); |
coleenp@4037 | 1248 | #ifdef ASSERT |
coleenp@4037 | 1249 | new_entry->mangle(); |
coleenp@4037 | 1250 | #endif |
coleenp@4037 | 1251 | if (TraceMetavirtualspaceAllocation && Verbose) { |
coleenp@4037 | 1252 | VirtualSpaceNode* vsl = current_virtual_space(); |
stefank@5708 | 1253 | vsl->print_on(gclog_or_tty); |
coleenp@4037 | 1254 | } |
coleenp@4037 | 1255 | } |
coleenp@4037 | 1256 | |
stefank@5863 | 1257 | bool VirtualSpaceList::expand_node_by(VirtualSpaceNode* node, |
stefank@5863 | 1258 | size_t min_words, |
stefank@5863 | 1259 | size_t preferred_words) { |
stefank@5704 | 1260 | size_t before = node->committed_words(); |
stefank@5704 | 1261 | |
stefank@5863 | 1262 | bool result = node->expand_by(min_words, preferred_words); |
stefank@5704 | 1263 | |
stefank@5704 | 1264 | size_t after = node->committed_words(); |
stefank@5704 | 1265 | |
stefank@5704 | 1266 | // after and before can be the same if the memory was pre-committed. |
stefank@5863 | 1267 | assert(after >= before, "Inconsistency"); |
stefank@5704 | 1268 | inc_committed_words(after - before); |
stefank@5704 | 1269 | |
stefank@5704 | 1270 | return result; |
stefank@5704 | 1271 | } |
stefank@5704 | 1272 | |
stefank@5863 | 1273 | bool VirtualSpaceList::expand_by(size_t min_words, size_t preferred_words) { |
stefank@5863 | 1274 | assert_is_size_aligned(min_words, Metaspace::commit_alignment_words()); |
stefank@5863 | 1275 | assert_is_size_aligned(preferred_words, Metaspace::commit_alignment_words()); |
stefank@5863 | 1276 | assert(min_words <= preferred_words, "Invalid arguments"); |
stefank@5863 | 1277 | |
stefank@5863 | 1278 | if (!MetaspaceGC::can_expand(min_words, this->is_class())) { |
stefank@5863 | 1279 | return false; |
stefank@5863 | 1280 | } |
stefank@5863 | 1281 | |
stefank@5863 | 1282 | size_t allowed_expansion_words = MetaspaceGC::allowed_expansion(); |
stefank@5863 | 1283 | if (allowed_expansion_words < min_words) { |
stefank@5863 | 1284 | return false; |
stefank@5863 | 1285 | } |
stefank@5863 | 1286 | |
stefank@5863 | 1287 | size_t max_expansion_words = MIN2(preferred_words, allowed_expansion_words); |
stefank@5863 | 1288 | |
stefank@5863 | 1289 | // Commit more memory from the the current virtual space. |
stefank@5863 | 1290 | bool vs_expanded = expand_node_by(current_virtual_space(), |
stefank@5863 | 1291 | min_words, |
stefank@5863 | 1292 | max_expansion_words); |
stefank@5863 | 1293 | if (vs_expanded) { |
stefank@5863 | 1294 | return true; |
stefank@5863 | 1295 | } |
mgerdin@6004 | 1296 | retire_current_virtual_space(); |
stefank@5863 | 1297 | |
stefank@5863 | 1298 | // Get another virtual space. |
stefank@5863 | 1299 | size_t grow_vs_words = MAX2((size_t)VirtualSpaceSize, preferred_words); |
stefank@5863 | 1300 | grow_vs_words = align_size_up(grow_vs_words, Metaspace::reserve_alignment_words()); |
stefank@5863 | 1301 | |
stefank@5863 | 1302 | if (create_new_virtual_space(grow_vs_words)) { |
stefank@5863 | 1303 | if (current_virtual_space()->is_pre_committed()) { |
stefank@5863 | 1304 | // The memory was pre-committed, so we are done here. |
stefank@5863 | 1305 | assert(min_words <= current_virtual_space()->committed_words(), |
stefank@5863 | 1306 | "The new VirtualSpace was pre-committed, so it" |
stefank@5863 | 1307 | "should be large enough to fit the alloc request."); |
stefank@5863 | 1308 | return true; |
stefank@5863 | 1309 | } |
stefank@5863 | 1310 | |
stefank@5863 | 1311 | return expand_node_by(current_virtual_space(), |
stefank@5863 | 1312 | min_words, |
stefank@5863 | 1313 | max_expansion_words); |
stefank@5863 | 1314 | } |
stefank@5863 | 1315 | |
stefank@5863 | 1316 | return false; |
stefank@5863 | 1317 | } |
stefank@5863 | 1318 | |
coleenp@4037 | 1319 | Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
jmasa@4382 | 1320 | size_t grow_chunks_by_words, |
jmasa@4382 | 1321 | size_t medium_chunk_bunch) { |
coleenp@4037 | 1322 | |
stefank@5771 | 1323 | // Allocate a chunk out of the current virtual space. |
stefank@5771 | 1324 | Metachunk* next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 1325 | |
stefank@5863 | 1326 | if (next != NULL) { |
stefank@5863 | 1327 | return next; |
coleenp@4037 | 1328 | } |
coleenp@4037 | 1329 | |
stefank@5863 | 1330 | // The expand amount is currently only determined by the requested sizes |
stefank@5863 | 1331 | // and not how much committed memory is left in the current virtual space. |
stefank@5863 | 1332 | |
stefank@5863 | 1333 | size_t min_word_size = align_size_up(grow_chunks_by_words, Metaspace::commit_alignment_words()); |
stefank@5863 | 1334 | size_t preferred_word_size = align_size_up(medium_chunk_bunch, Metaspace::commit_alignment_words()); |
stefank@5863 | 1335 | if (min_word_size >= preferred_word_size) { |
stefank@5863 | 1336 | // Can happen when humongous chunks are allocated. |
stefank@5863 | 1337 | preferred_word_size = min_word_size; |
stefank@5863 | 1338 | } |
stefank@5863 | 1339 | |
stefank@5863 | 1340 | bool expanded = expand_by(min_word_size, preferred_word_size); |
stefank@5863 | 1341 | if (expanded) { |
stefank@5863 | 1342 | next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
stefank@5863 | 1343 | assert(next != NULL, "The allocation was expected to succeed after the expansion"); |
stefank@5863 | 1344 | } |
stefank@5863 | 1345 | |
stefank@5863 | 1346 | return next; |
jmasa@4382 | 1347 | } |
jmasa@4382 | 1348 | |
coleenp@4037 | 1349 | void VirtualSpaceList::print_on(outputStream* st) const { |
coleenp@4037 | 1350 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1351 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 1352 | while (iter.repeat()) { |
coleenp@4037 | 1353 | VirtualSpaceNode* node = iter.get_next(); |
coleenp@4037 | 1354 | node->print_on(st); |
coleenp@4037 | 1355 | } |
coleenp@4037 | 1356 | } |
coleenp@4037 | 1357 | } |
coleenp@4037 | 1358 | |
coleenp@4037 | 1359 | // MetaspaceGC methods |
coleenp@4037 | 1360 | |
coleenp@4037 | 1361 | // VM_CollectForMetadataAllocation is the vm operation used to GC. |
coleenp@4037 | 1362 | // Within the VM operation after the GC the attempt to allocate the metadata |
coleenp@4037 | 1363 | // should succeed. If the GC did not free enough space for the metaspace |
coleenp@4037 | 1364 | // allocation, the HWM is increased so that another virtualspace will be |
coleenp@4037 | 1365 | // allocated for the metadata. With perm gen the increase in the perm |
coleenp@4037 | 1366 | // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
coleenp@4037 | 1367 | // metaspace policy uses those as the small and large steps for the HWM. |
coleenp@4037 | 1368 | // |
coleenp@4037 | 1369 | // After the GC the compute_new_size() for MetaspaceGC is called to |
coleenp@4037 | 1370 | // resize the capacity of the metaspaces. The current implementation |
jmasa@5015 | 1371 | // is based on the flags MinMetaspaceFreeRatio and MaxMetaspaceFreeRatio used |
coleenp@4037 | 1372 | // to resize the Java heap by some GC's. New flags can be implemented |
jmasa@5015 | 1373 | // if really needed. MinMetaspaceFreeRatio is used to calculate how much |
coleenp@4037 | 1374 | // free space is desirable in the metaspace capacity to decide how much |
jmasa@4581 | 1375 | // to increase the HWM. MaxMetaspaceFreeRatio is used to decide how much |
coleenp@4037 | 1376 | // free space is desirable in the metaspace capacity before decreasing |
coleenp@4037 | 1377 | // the HWM. |
coleenp@4037 | 1378 | |
coleenp@4037 | 1379 | // Calculate the amount to increase the high water mark (HWM). |
coleenp@4037 | 1380 | // Increase by a minimum amount (MinMetaspaceExpansion) so that |
coleenp@4037 | 1381 | // another expansion is not requested too soon. If that is not |
stefank@5863 | 1382 | // enough to satisfy the allocation, increase by MaxMetaspaceExpansion. |
stefank@5863 | 1383 | // If that is still not enough, expand by the size of the allocation |
stefank@5863 | 1384 | // plus some. |
stefank@5863 | 1385 | size_t MetaspaceGC::delta_capacity_until_GC(size_t bytes) { |
stefank@5863 | 1386 | size_t min_delta = MinMetaspaceExpansion; |
stefank@5863 | 1387 | size_t max_delta = MaxMetaspaceExpansion; |
stefank@5863 | 1388 | size_t delta = align_size_up(bytes, Metaspace::commit_alignment()); |
stefank@5863 | 1389 | |
stefank@5863 | 1390 | if (delta <= min_delta) { |
stefank@5863 | 1391 | delta = min_delta; |
stefank@5863 | 1392 | } else if (delta <= max_delta) { |
coleenp@4037 | 1393 | // Don't want to hit the high water mark on the next |
coleenp@4037 | 1394 | // allocation so make the delta greater than just enough |
coleenp@4037 | 1395 | // for this allocation. |
stefank@5863 | 1396 | delta = max_delta; |
stefank@5863 | 1397 | } else { |
stefank@5863 | 1398 | // This allocation is large but the next ones are probably not |
stefank@5863 | 1399 | // so increase by the minimum. |
stefank@5863 | 1400 | delta = delta + min_delta; |
coleenp@4037 | 1401 | } |
stefank@5863 | 1402 | |
stefank@5863 | 1403 | assert_is_size_aligned(delta, Metaspace::commit_alignment()); |
stefank@5863 | 1404 | |
stefank@5863 | 1405 | return delta; |
coleenp@4037 | 1406 | } |
coleenp@4037 | 1407 | |
stefank@5863 | 1408 | size_t MetaspaceGC::capacity_until_GC() { |
stefank@5863 | 1409 | size_t value = (size_t)OrderAccess::load_ptr_acquire(&_capacity_until_GC); |
stefank@5863 | 1410 | assert(value >= MetaspaceSize, "Not initialied properly?"); |
stefank@5863 | 1411 | return value; |
stefank@5863 | 1412 | } |
stefank@5863 | 1413 | |
stefank@5863 | 1414 | size_t MetaspaceGC::inc_capacity_until_GC(size_t v) { |
stefank@5863 | 1415 | assert_is_size_aligned(v, Metaspace::commit_alignment()); |
stefank@5863 | 1416 | |
stefank@5863 | 1417 | return (size_t)Atomic::add_ptr(v, &_capacity_until_GC); |
stefank@5863 | 1418 | } |
stefank@5863 | 1419 | |
stefank@5863 | 1420 | size_t MetaspaceGC::dec_capacity_until_GC(size_t v) { |
stefank@5863 | 1421 | assert_is_size_aligned(v, Metaspace::commit_alignment()); |
stefank@5863 | 1422 | |
stefank@5863 | 1423 | return (size_t)Atomic::add_ptr(-(intptr_t)v, &_capacity_until_GC); |
stefank@5863 | 1424 | } |
stefank@5863 | 1425 | |
ehelin@6722 | 1426 | void MetaspaceGC::initialize() { |
ehelin@6722 | 1427 | // Set the high-water mark to MaxMetapaceSize during VM initializaton since |
ehelin@6722 | 1428 | // we can't do a GC during initialization. |
ehelin@6722 | 1429 | _capacity_until_GC = MaxMetaspaceSize; |
ehelin@6722 | 1430 | } |
ehelin@6722 | 1431 | |
ehelin@6722 | 1432 | void MetaspaceGC::post_initialize() { |
ehelin@6722 | 1433 | // Reset the high-water mark once the VM initialization is done. |
ehelin@6722 | 1434 | _capacity_until_GC = MAX2(MetaspaceAux::committed_bytes(), MetaspaceSize); |
ehelin@6722 | 1435 | } |
ehelin@6722 | 1436 | |
stefank@5863 | 1437 | bool MetaspaceGC::can_expand(size_t word_size, bool is_class) { |
stefank@5863 | 1438 | // Check if the compressed class space is full. |
stefank@5863 | 1439 | if (is_class && Metaspace::using_class_space()) { |
stefank@5863 | 1440 | size_t class_committed = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
stefank@5863 | 1441 | if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) { |
coleenp@5337 | 1442 | return false; |
coleenp@5337 | 1443 | } |
mgerdin@4790 | 1444 | } |
coleenp@4037 | 1445 | |
stefank@5863 | 1446 | // Check if the user has imposed a limit on the metaspace memory. |
stefank@5863 | 1447 | size_t committed_bytes = MetaspaceAux::committed_bytes(); |
stefank@5863 | 1448 | if (committed_bytes + word_size * BytesPerWord > MaxMetaspaceSize) { |
stefank@5863 | 1449 | return false; |
coleenp@4037 | 1450 | } |
coleenp@4037 | 1451 | |
stefank@5863 | 1452 | return true; |
stefank@5863 | 1453 | } |
stefank@5863 | 1454 | |
stefank@5863 | 1455 | size_t MetaspaceGC::allowed_expansion() { |
stefank@5863 | 1456 | size_t committed_bytes = MetaspaceAux::committed_bytes(); |
ehelin@6722 | 1457 | size_t capacity_until_gc = capacity_until_GC(); |
ehelin@6722 | 1458 | |
ehelin@6722 | 1459 | assert(capacity_until_gc >= committed_bytes, |
ehelin@6722 | 1460 | err_msg("capacity_until_gc: " SIZE_FORMAT " < committed_bytes: " SIZE_FORMAT, |
ehelin@6722 | 1461 | capacity_until_gc, committed_bytes)); |
stefank@5863 | 1462 | |
stefank@5863 | 1463 | size_t left_until_max = MaxMetaspaceSize - committed_bytes; |
stefank@5863 | 1464 | size_t left_until_GC = capacity_until_gc - committed_bytes; |
stefank@5863 | 1465 | size_t left_to_commit = MIN2(left_until_GC, left_until_max); |
stefank@5863 | 1466 | |
stefank@5863 | 1467 | return left_to_commit / BytesPerWord; |
coleenp@4037 | 1468 | } |
coleenp@4037 | 1469 | |
coleenp@4037 | 1470 | void MetaspaceGC::compute_new_size() { |
coleenp@4037 | 1471 | assert(_shrink_factor <= 100, "invalid shrink factor"); |
coleenp@4037 | 1472 | uint current_shrink_factor = _shrink_factor; |
coleenp@4037 | 1473 | _shrink_factor = 0; |
coleenp@4037 | 1474 | |
ehelin@6722 | 1475 | // Using committed_bytes() for used_after_gc is an overestimation, since the |
ehelin@6722 | 1476 | // chunk free lists are included in committed_bytes() and the memory in an |
ehelin@6722 | 1477 | // un-fragmented chunk free list is available for future allocations. |
ehelin@6722 | 1478 | // However, if the chunk free lists becomes fragmented, then the memory may |
ehelin@6722 | 1479 | // not be available for future allocations and the memory is therefore "in use". |
ehelin@6722 | 1480 | // Including the chunk free lists in the definition of "in use" is therefore |
ehelin@6722 | 1481 | // necessary. Not including the chunk free lists can cause capacity_until_GC to |
ehelin@6722 | 1482 | // shrink below committed_bytes() and this has caused serious bugs in the past. |
ehelin@6722 | 1483 | const size_t used_after_gc = MetaspaceAux::committed_bytes(); |
jmasa@5015 | 1484 | const size_t capacity_until_GC = MetaspaceGC::capacity_until_GC(); |
coleenp@4037 | 1485 | |
jmasa@4581 | 1486 | const double minimum_free_percentage = MinMetaspaceFreeRatio / 100.0; |
coleenp@4037 | 1487 | const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
coleenp@4037 | 1488 | |
coleenp@4037 | 1489 | const double min_tmp = used_after_gc / maximum_used_percentage; |
coleenp@4037 | 1490 | size_t minimum_desired_capacity = |
coleenp@4037 | 1491 | (size_t)MIN2(min_tmp, double(max_uintx)); |
coleenp@4037 | 1492 | // Don't shrink less than the initial generation size |
coleenp@4037 | 1493 | minimum_desired_capacity = MAX2(minimum_desired_capacity, |
coleenp@4037 | 1494 | MetaspaceSize); |
coleenp@4037 | 1495 | |
coleenp@4037 | 1496 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1497 | gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
coleenp@4037 | 1498 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1499 | " minimum_free_percentage: %6.2f" |
coleenp@4037 | 1500 | " maximum_used_percentage: %6.2f", |
coleenp@4037 | 1501 | minimum_free_percentage, |
coleenp@4037 | 1502 | maximum_used_percentage); |
coleenp@4037 | 1503 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1504 | " used_after_gc : %6.1fKB", |
jmasa@5015 | 1505 | used_after_gc / (double) K); |
coleenp@4037 | 1506 | } |
coleenp@4037 | 1507 | |
coleenp@4037 | 1508 | |
jmasa@5015 | 1509 | size_t shrink_bytes = 0; |
coleenp@4037 | 1510 | if (capacity_until_GC < minimum_desired_capacity) { |
coleenp@4037 | 1511 | // If we have less capacity below the metaspace HWM, then |
coleenp@4037 | 1512 | // increment the HWM. |
coleenp@4037 | 1513 | size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
stefank@5863 | 1514 | expand_bytes = align_size_up(expand_bytes, Metaspace::commit_alignment()); |
coleenp@4037 | 1515 | // Don't expand unless it's significant |
coleenp@4037 | 1516 | if (expand_bytes >= MinMetaspaceExpansion) { |
ehelin@6417 | 1517 | size_t new_capacity_until_GC = MetaspaceGC::inc_capacity_until_GC(expand_bytes); |
ehelin@6417 | 1518 | Metaspace::tracer()->report_gc_threshold(capacity_until_GC, |
ehelin@6417 | 1519 | new_capacity_until_GC, |
ehelin@6417 | 1520 | MetaspaceGCThresholdUpdater::ComputeNewSize); |
ehelin@6417 | 1521 | if (PrintGCDetails && Verbose) { |
ehelin@6417 | 1522 | gclog_or_tty->print_cr(" expanding:" |
ehelin@6417 | 1523 | " minimum_desired_capacity: %6.1fKB" |
ehelin@6417 | 1524 | " expand_bytes: %6.1fKB" |
ehelin@6417 | 1525 | " MinMetaspaceExpansion: %6.1fKB" |
ehelin@6417 | 1526 | " new metaspace HWM: %6.1fKB", |
ehelin@6417 | 1527 | minimum_desired_capacity / (double) K, |
ehelin@6417 | 1528 | expand_bytes / (double) K, |
ehelin@6417 | 1529 | MinMetaspaceExpansion / (double) K, |
ehelin@6417 | 1530 | new_capacity_until_GC / (double) K); |
ehelin@6417 | 1531 | } |
coleenp@4037 | 1532 | } |
coleenp@4037 | 1533 | return; |
coleenp@4037 | 1534 | } |
coleenp@4037 | 1535 | |
coleenp@4037 | 1536 | // No expansion, now see if we want to shrink |
coleenp@4037 | 1537 | // We would never want to shrink more than this |
jmasa@5015 | 1538 | size_t max_shrink_bytes = capacity_until_GC - minimum_desired_capacity; |
jmasa@5015 | 1539 | assert(max_shrink_bytes >= 0, err_msg("max_shrink_bytes " SIZE_FORMAT, |
jmasa@5015 | 1540 | max_shrink_bytes)); |
coleenp@4037 | 1541 | |
coleenp@4037 | 1542 | // Should shrinking be considered? |
jmasa@4581 | 1543 | if (MaxMetaspaceFreeRatio < 100) { |
jmasa@4581 | 1544 | const double maximum_free_percentage = MaxMetaspaceFreeRatio / 100.0; |
coleenp@4037 | 1545 | const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
coleenp@4037 | 1546 | const double max_tmp = used_after_gc / minimum_used_percentage; |
coleenp@4037 | 1547 | size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
coleenp@4037 | 1548 | maximum_desired_capacity = MAX2(maximum_desired_capacity, |
coleenp@4037 | 1549 | MetaspaceSize); |
jmasa@5015 | 1550 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1551 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1552 | " maximum_free_percentage: %6.2f" |
coleenp@4037 | 1553 | " minimum_used_percentage: %6.2f", |
coleenp@4037 | 1554 | maximum_free_percentage, |
coleenp@4037 | 1555 | minimum_used_percentage); |
coleenp@4037 | 1556 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1557 | " minimum_desired_capacity: %6.1fKB" |
jmasa@5015 | 1558 | " maximum_desired_capacity: %6.1fKB", |
coleenp@4037 | 1559 | minimum_desired_capacity / (double) K, |
coleenp@4037 | 1560 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1561 | } |
coleenp@4037 | 1562 | |
coleenp@4037 | 1563 | assert(minimum_desired_capacity <= maximum_desired_capacity, |
coleenp@4037 | 1564 | "sanity check"); |
coleenp@4037 | 1565 | |
coleenp@4037 | 1566 | if (capacity_until_GC > maximum_desired_capacity) { |
coleenp@4037 | 1567 | // Capacity too large, compute shrinking size |
jmasa@5015 | 1568 | shrink_bytes = capacity_until_GC - maximum_desired_capacity; |
coleenp@4037 | 1569 | // We don't want shrink all the way back to initSize if people call |
coleenp@4037 | 1570 | // System.gc(), because some programs do that between "phases" and then |
coleenp@4037 | 1571 | // we'd just have to grow the heap up again for the next phase. So we |
coleenp@4037 | 1572 | // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
coleenp@4037 | 1573 | // on the third call, and 100% by the fourth call. But if we recompute |
coleenp@4037 | 1574 | // size without shrinking, it goes back to 0%. |
jmasa@5015 | 1575 | shrink_bytes = shrink_bytes / 100 * current_shrink_factor; |
stefank@5863 | 1576 | |
stefank@5863 | 1577 | shrink_bytes = align_size_down(shrink_bytes, Metaspace::commit_alignment()); |
stefank@5863 | 1578 | |
jmasa@5015 | 1579 | assert(shrink_bytes <= max_shrink_bytes, |
coleenp@4037 | 1580 | err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
jmasa@5015 | 1581 | shrink_bytes, max_shrink_bytes)); |
coleenp@4037 | 1582 | if (current_shrink_factor == 0) { |
coleenp@4037 | 1583 | _shrink_factor = 10; |
coleenp@4037 | 1584 | } else { |
coleenp@4037 | 1585 | _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
coleenp@4037 | 1586 | } |
coleenp@4037 | 1587 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1588 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1589 | " shrinking:" |
coleenp@4037 | 1590 | " initSize: %.1fK" |
coleenp@4037 | 1591 | " maximum_desired_capacity: %.1fK", |
coleenp@4037 | 1592 | MetaspaceSize / (double) K, |
coleenp@4037 | 1593 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1594 | gclog_or_tty->print_cr(" " |
jmasa@5015 | 1595 | " shrink_bytes: %.1fK" |
coleenp@4037 | 1596 | " current_shrink_factor: %d" |
coleenp@4037 | 1597 | " new shrink factor: %d" |
coleenp@4037 | 1598 | " MinMetaspaceExpansion: %.1fK", |
jmasa@5015 | 1599 | shrink_bytes / (double) K, |
coleenp@4037 | 1600 | current_shrink_factor, |
coleenp@4037 | 1601 | _shrink_factor, |
coleenp@4037 | 1602 | MinMetaspaceExpansion / (double) K); |
coleenp@4037 | 1603 | } |
coleenp@4037 | 1604 | } |
coleenp@4037 | 1605 | } |
coleenp@4037 | 1606 | |
coleenp@4037 | 1607 | // Don't shrink unless it's significant |
jmasa@5015 | 1608 | if (shrink_bytes >= MinMetaspaceExpansion && |
jmasa@5015 | 1609 | ((capacity_until_GC - shrink_bytes) >= MetaspaceSize)) { |
ehelin@6417 | 1610 | size_t new_capacity_until_GC = MetaspaceGC::dec_capacity_until_GC(shrink_bytes); |
ehelin@6417 | 1611 | Metaspace::tracer()->report_gc_threshold(capacity_until_GC, |
ehelin@6417 | 1612 | new_capacity_until_GC, |
ehelin@6417 | 1613 | MetaspaceGCThresholdUpdater::ComputeNewSize); |
coleenp@4037 | 1614 | } |
coleenp@4037 | 1615 | } |
coleenp@4037 | 1616 | |
coleenp@4037 | 1617 | // Metadebug methods |
coleenp@4037 | 1618 | |
coleenp@4037 | 1619 | void Metadebug::init_allocation_fail_alot_count() { |
coleenp@4037 | 1620 | if (MetadataAllocationFailALot) { |
coleenp@4037 | 1621 | _allocation_fail_alot_count = |
coleenp@4037 | 1622 | 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
coleenp@4037 | 1623 | } |
coleenp@4037 | 1624 | } |
coleenp@4037 | 1625 | |
coleenp@4037 | 1626 | #ifdef ASSERT |
coleenp@4037 | 1627 | bool Metadebug::test_metadata_failure() { |
coleenp@4037 | 1628 | if (MetadataAllocationFailALot && |
coleenp@4037 | 1629 | Threads::is_vm_complete()) { |
coleenp@4037 | 1630 | if (_allocation_fail_alot_count > 0) { |
coleenp@4037 | 1631 | _allocation_fail_alot_count--; |
coleenp@4037 | 1632 | } else { |
coleenp@4037 | 1633 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1634 | gclog_or_tty->print_cr("Metadata allocation failing for " |
coleenp@4037 | 1635 | "MetadataAllocationFailALot"); |
coleenp@4037 | 1636 | } |
coleenp@4037 | 1637 | init_allocation_fail_alot_count(); |
coleenp@4037 | 1638 | return true; |
coleenp@4037 | 1639 | } |
coleenp@4037 | 1640 | } |
coleenp@4037 | 1641 | return false; |
coleenp@4037 | 1642 | } |
coleenp@4037 | 1643 | #endif |
coleenp@4037 | 1644 | |
coleenp@4037 | 1645 | // ChunkManager methods |
coleenp@4037 | 1646 | |
ehelin@5703 | 1647 | size_t ChunkManager::free_chunks_total_words() { |
coleenp@4037 | 1648 | return _free_chunks_total; |
coleenp@4037 | 1649 | } |
coleenp@4037 | 1650 | |
ehelin@5703 | 1651 | size_t ChunkManager::free_chunks_total_bytes() { |
ehelin@5703 | 1652 | return free_chunks_total_words() * BytesPerWord; |
coleenp@4037 | 1653 | } |
coleenp@4037 | 1654 | |
coleenp@4037 | 1655 | size_t ChunkManager::free_chunks_count() { |
coleenp@4037 | 1656 | #ifdef ASSERT |
coleenp@4037 | 1657 | if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
coleenp@4037 | 1658 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1659 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1660 | // This lock is only needed in debug because the verification |
coleenp@4037 | 1661 | // of the _free_chunks_totals walks the list of free chunks |
mgerdin@4264 | 1662 | slow_locked_verify_free_chunks_count(); |
coleenp@4037 | 1663 | } |
coleenp@4037 | 1664 | #endif |
mgerdin@4264 | 1665 | return _free_chunks_count; |
coleenp@4037 | 1666 | } |
coleenp@4037 | 1667 | |
coleenp@4037 | 1668 | void ChunkManager::locked_verify_free_chunks_total() { |
coleenp@4037 | 1669 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1670 | assert(sum_free_chunks() == _free_chunks_total, |
coleenp@4037 | 1671 | err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
coleenp@4037 | 1672 | " same as sum " SIZE_FORMAT, _free_chunks_total, |
coleenp@4037 | 1673 | sum_free_chunks())); |
coleenp@4037 | 1674 | } |
coleenp@4037 | 1675 | |
coleenp@4037 | 1676 | void ChunkManager::verify_free_chunks_total() { |
coleenp@4037 | 1677 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1678 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1679 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1680 | } |
coleenp@4037 | 1681 | |
coleenp@4037 | 1682 | void ChunkManager::locked_verify_free_chunks_count() { |
coleenp@4037 | 1683 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1684 | assert(sum_free_chunks_count() == _free_chunks_count, |
coleenp@4037 | 1685 | err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
coleenp@4037 | 1686 | " same as sum " SIZE_FORMAT, _free_chunks_count, |
coleenp@4037 | 1687 | sum_free_chunks_count())); |
coleenp@4037 | 1688 | } |
coleenp@4037 | 1689 | |
coleenp@4037 | 1690 | void ChunkManager::verify_free_chunks_count() { |
coleenp@4037 | 1691 | #ifdef ASSERT |
coleenp@4037 | 1692 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1693 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1694 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1695 | #endif |
coleenp@4037 | 1696 | } |
coleenp@4037 | 1697 | |
coleenp@4037 | 1698 | void ChunkManager::verify() { |
mgerdin@4264 | 1699 | MutexLockerEx cl(SpaceManager::expand_lock(), |
mgerdin@4264 | 1700 | Mutex::_no_safepoint_check_flag); |
mgerdin@4264 | 1701 | locked_verify(); |
coleenp@4037 | 1702 | } |
coleenp@4037 | 1703 | |
coleenp@4037 | 1704 | void ChunkManager::locked_verify() { |
jmasa@4196 | 1705 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1706 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1707 | } |
coleenp@4037 | 1708 | |
coleenp@4037 | 1709 | void ChunkManager::locked_print_free_chunks(outputStream* st) { |
coleenp@4037 | 1710 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4382 | 1711 | st->print_cr("Free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
coleenp@4037 | 1712 | _free_chunks_total, _free_chunks_count); |
coleenp@4037 | 1713 | } |
coleenp@4037 | 1714 | |
coleenp@4037 | 1715 | void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
coleenp@4037 | 1716 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4382 | 1717 | st->print_cr("Sum free chunk total " SIZE_FORMAT " count " SIZE_FORMAT, |
coleenp@4037 | 1718 | sum_free_chunks(), sum_free_chunks_count()); |
coleenp@4037 | 1719 | } |
coleenp@4037 | 1720 | ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
coleenp@4037 | 1721 | return &_free_chunks[index]; |
coleenp@4037 | 1722 | } |
coleenp@4037 | 1723 | |
coleenp@4037 | 1724 | // These methods that sum the free chunk lists are used in printing |
coleenp@4037 | 1725 | // methods that are used in product builds. |
coleenp@4037 | 1726 | size_t ChunkManager::sum_free_chunks() { |
coleenp@4037 | 1727 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1728 | size_t result = 0; |
jmasa@4382 | 1729 | for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1730 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1731 | |
coleenp@4037 | 1732 | if (list == NULL) { |
coleenp@4037 | 1733 | continue; |
coleenp@4037 | 1734 | } |
coleenp@4037 | 1735 | |
jmasa@4932 | 1736 | result = result + list->count() * list->size(); |
coleenp@4037 | 1737 | } |
jmasa@4196 | 1738 | result = result + humongous_dictionary()->total_size(); |
coleenp@4037 | 1739 | return result; |
coleenp@4037 | 1740 | } |
coleenp@4037 | 1741 | |
coleenp@4037 | 1742 | size_t ChunkManager::sum_free_chunks_count() { |
coleenp@4037 | 1743 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1744 | size_t count = 0; |
jmasa@4382 | 1745 | for (ChunkIndex i = ZeroIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1746 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1747 | if (list == NULL) { |
coleenp@4037 | 1748 | continue; |
coleenp@4037 | 1749 | } |
jmasa@4932 | 1750 | count = count + list->count(); |
coleenp@4037 | 1751 | } |
jmasa@4196 | 1752 | count = count + humongous_dictionary()->total_free_blocks(); |
coleenp@4037 | 1753 | return count; |
coleenp@4037 | 1754 | } |
coleenp@4037 | 1755 | |
coleenp@4037 | 1756 | ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
jmasa@4382 | 1757 | ChunkIndex index = list_index(word_size); |
jmasa@4382 | 1758 | assert(index < HumongousIndex, "No humongous list"); |
jmasa@4382 | 1759 | return free_chunks(index); |
coleenp@4037 | 1760 | } |
coleenp@4037 | 1761 | |
coleenp@4037 | 1762 | Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
coleenp@4037 | 1763 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1764 | |
mgerdin@4264 | 1765 | slow_locked_verify(); |
jmasa@4196 | 1766 | |
jmasa@4196 | 1767 | Metachunk* chunk = NULL; |
jmasa@4382 | 1768 | if (list_index(word_size) != HumongousIndex) { |
jmasa@4196 | 1769 | ChunkList* free_list = find_free_chunks_list(word_size); |
jmasa@4196 | 1770 | assert(free_list != NULL, "Sanity check"); |
jmasa@4196 | 1771 | |
jmasa@4196 | 1772 | chunk = free_list->head(); |
jmasa@4196 | 1773 | |
jmasa@4196 | 1774 | if (chunk == NULL) { |
jmasa@4196 | 1775 | return NULL; |
jmasa@4196 | 1776 | } |
jmasa@4196 | 1777 | |
coleenp@4037 | 1778 | // Remove the chunk as the head of the list. |
jmasa@4932 | 1779 | free_list->remove_chunk(chunk); |
jmasa@4382 | 1780 | |
coleenp@4037 | 1781 | if (TraceMetadataChunkAllocation && Verbose) { |
stefank@5708 | 1782 | gclog_or_tty->print_cr("ChunkManager::free_chunks_get: free_list " |
stefank@5708 | 1783 | PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
stefank@5708 | 1784 | free_list, chunk, chunk->word_size()); |
coleenp@4037 | 1785 | } |
coleenp@4037 | 1786 | } else { |
jmasa@4196 | 1787 | chunk = humongous_dictionary()->get_chunk( |
jmasa@4196 | 1788 | word_size, |
jmasa@4196 | 1789 | FreeBlockDictionary<Metachunk>::atLeast); |
jmasa@4196 | 1790 | |
stefank@5863 | 1791 | if (chunk == NULL) { |
jmasa@4382 | 1792 | return NULL; |
coleenp@4037 | 1793 | } |
stefank@5863 | 1794 | |
stefank@5863 | 1795 | if (TraceMetadataHumongousAllocation) { |
stefank@5863 | 1796 | size_t waste = chunk->word_size() - word_size; |
stefank@5863 | 1797 | gclog_or_tty->print_cr("Free list allocate humongous chunk size " |
stefank@5863 | 1798 | SIZE_FORMAT " for requested size " SIZE_FORMAT |
stefank@5863 | 1799 | " waste " SIZE_FORMAT, |
stefank@5863 | 1800 | chunk->word_size(), word_size, waste); |
stefank@5863 | 1801 | } |
coleenp@4037 | 1802 | } |
jmasa@4382 | 1803 | |
stefank@5863 | 1804 | // Chunk is being removed from the chunks free list. |
stefank@5941 | 1805 | dec_free_chunks_total(chunk->word_size()); |
stefank@5863 | 1806 | |
jmasa@4382 | 1807 | // Remove it from the links to this freelist |
jmasa@4382 | 1808 | chunk->set_next(NULL); |
jmasa@4382 | 1809 | chunk->set_prev(NULL); |
jmasa@5007 | 1810 | #ifdef ASSERT |
jmasa@5007 | 1811 | // Chunk is no longer on any freelist. Setting to false make container_count_slow() |
jmasa@5007 | 1812 | // work. |
stefank@5941 | 1813 | chunk->set_is_tagged_free(false); |
jmasa@5007 | 1814 | #endif |
stefank@5771 | 1815 | chunk->container()->inc_container_count(); |
stefank@5771 | 1816 | |
mgerdin@4264 | 1817 | slow_locked_verify(); |
coleenp@4037 | 1818 | return chunk; |
coleenp@4037 | 1819 | } |
coleenp@4037 | 1820 | |
coleenp@4037 | 1821 | Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
coleenp@4037 | 1822 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@4264 | 1823 | slow_locked_verify(); |
coleenp@4037 | 1824 | |
coleenp@4037 | 1825 | // Take from the beginning of the list |
coleenp@4037 | 1826 | Metachunk* chunk = free_chunks_get(word_size); |
coleenp@4037 | 1827 | if (chunk == NULL) { |
coleenp@4037 | 1828 | return NULL; |
coleenp@4037 | 1829 | } |
coleenp@4037 | 1830 | |
jmasa@4382 | 1831 | assert((word_size <= chunk->word_size()) || |
jmasa@4382 | 1832 | list_index(chunk->word_size() == HumongousIndex), |
jmasa@4382 | 1833 | "Non-humongous variable sized chunk"); |
coleenp@4037 | 1834 | if (TraceMetadataChunkAllocation) { |
jmasa@4382 | 1835 | size_t list_count; |
jmasa@4382 | 1836 | if (list_index(word_size) < HumongousIndex) { |
jmasa@4382 | 1837 | ChunkList* list = find_free_chunks_list(word_size); |
jmasa@4932 | 1838 | list_count = list->count(); |
jmasa@4382 | 1839 | } else { |
jmasa@4382 | 1840 | list_count = humongous_dictionary()->total_count(); |
jmasa@4382 | 1841 | } |
stefank@5708 | 1842 | gclog_or_tty->print("ChunkManager::chunk_freelist_allocate: " PTR_FORMAT " chunk " |
stefank@5708 | 1843 | PTR_FORMAT " size " SIZE_FORMAT " count " SIZE_FORMAT " ", |
stefank@5708 | 1844 | this, chunk, chunk->word_size(), list_count); |
stefank@5708 | 1845 | locked_print_free_chunks(gclog_or_tty); |
coleenp@4037 | 1846 | } |
coleenp@4037 | 1847 | |
coleenp@4037 | 1848 | return chunk; |
coleenp@4037 | 1849 | } |
coleenp@4037 | 1850 | |
stefank@5771 | 1851 | void ChunkManager::print_on(outputStream* out) const { |
jmasa@4196 | 1852 | if (PrintFLSStatistics != 0) { |
stefank@5771 | 1853 | const_cast<ChunkManager *>(this)->humongous_dictionary()->report_statistics(); |
jmasa@4196 | 1854 | } |
jmasa@4196 | 1855 | } |
jmasa@4196 | 1856 | |
coleenp@4037 | 1857 | // SpaceManager methods |
coleenp@4037 | 1858 | |
jmasa@4382 | 1859 | void SpaceManager::get_initial_chunk_sizes(Metaspace::MetaspaceType type, |
jmasa@4382 | 1860 | size_t* chunk_word_size, |
jmasa@4382 | 1861 | size_t* class_chunk_word_size) { |
jmasa@4382 | 1862 | switch (type) { |
jmasa@4382 | 1863 | case Metaspace::BootMetaspaceType: |
jmasa@4382 | 1864 | *chunk_word_size = Metaspace::first_chunk_word_size(); |
jmasa@4382 | 1865 | *class_chunk_word_size = Metaspace::first_class_chunk_word_size(); |
jmasa@4382 | 1866 | break; |
jmasa@4382 | 1867 | case Metaspace::ROMetaspaceType: |
jmasa@4382 | 1868 | *chunk_word_size = SharedReadOnlySize / wordSize; |
jmasa@4382 | 1869 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1870 | break; |
jmasa@4382 | 1871 | case Metaspace::ReadWriteMetaspaceType: |
jmasa@4382 | 1872 | *chunk_word_size = SharedReadWriteSize / wordSize; |
jmasa@4382 | 1873 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1874 | break; |
jmasa@4382 | 1875 | case Metaspace::AnonymousMetaspaceType: |
jmasa@4382 | 1876 | case Metaspace::ReflectionMetaspaceType: |
jmasa@4382 | 1877 | *chunk_word_size = SpecializedChunk; |
jmasa@4382 | 1878 | *class_chunk_word_size = ClassSpecializedChunk; |
jmasa@4382 | 1879 | break; |
jmasa@4382 | 1880 | default: |
jmasa@4382 | 1881 | *chunk_word_size = SmallChunk; |
jmasa@4382 | 1882 | *class_chunk_word_size = ClassSmallChunk; |
jmasa@4382 | 1883 | break; |
jmasa@4382 | 1884 | } |
mikael@4548 | 1885 | assert(*chunk_word_size != 0 && *class_chunk_word_size != 0, |
jmasa@4382 | 1886 | err_msg("Initial chunks sizes bad: data " SIZE_FORMAT |
jmasa@4382 | 1887 | " class " SIZE_FORMAT, |
mikael@4548 | 1888 | *chunk_word_size, *class_chunk_word_size)); |
jmasa@4382 | 1889 | } |
jmasa@4382 | 1890 | |
coleenp@4037 | 1891 | size_t SpaceManager::sum_free_in_chunks_in_use() const { |
coleenp@4037 | 1892 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1893 | size_t free = 0; |
jmasa@4382 | 1894 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1895 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1896 | while (chunk != NULL) { |
coleenp@4037 | 1897 | free += chunk->free_word_size(); |
coleenp@4037 | 1898 | chunk = chunk->next(); |
coleenp@4037 | 1899 | } |
coleenp@4037 | 1900 | } |
coleenp@4037 | 1901 | return free; |
coleenp@4037 | 1902 | } |
coleenp@4037 | 1903 | |
coleenp@4037 | 1904 | size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
coleenp@4037 | 1905 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1906 | size_t result = 0; |
jmasa@4382 | 1907 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1908 | result += sum_waste_in_chunks_in_use(i); |
coleenp@4037 | 1909 | } |
jmasa@4196 | 1910 | |
coleenp@4037 | 1911 | return result; |
coleenp@4037 | 1912 | } |
coleenp@4037 | 1913 | |
coleenp@4037 | 1914 | size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
coleenp@4037 | 1915 | size_t result = 0; |
coleenp@4037 | 1916 | Metachunk* chunk = chunks_in_use(index); |
coleenp@4037 | 1917 | // Count the free space in all the chunk but not the |
coleenp@4037 | 1918 | // current chunk from which allocations are still being done. |
coleenp@5337 | 1919 | while (chunk != NULL) { |
coleenp@5337 | 1920 | if (chunk != current_chunk()) { |
jmasa@4196 | 1921 | result += chunk->free_word_size(); |
coleenp@4037 | 1922 | } |
coleenp@5337 | 1923 | chunk = chunk->next(); |
coleenp@4037 | 1924 | } |
coleenp@4037 | 1925 | return result; |
coleenp@4037 | 1926 | } |
coleenp@4037 | 1927 | |
coleenp@4037 | 1928 | size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
jmasa@5015 | 1929 | // For CMS use "allocated_chunks_words()" which does not need the |
jmasa@5015 | 1930 | // Metaspace lock. For the other collectors sum over the |
jmasa@5015 | 1931 | // lists. Use both methods as a check that "allocated_chunks_words()" |
jmasa@5015 | 1932 | // is correct. That is, sum_capacity_in_chunks() is too expensive |
jmasa@5015 | 1933 | // to use in the product and allocated_chunks_words() should be used |
jmasa@5015 | 1934 | // but allow for checking that allocated_chunks_words() returns the same |
jmasa@5015 | 1935 | // value as sum_capacity_in_chunks_in_use() which is the definitive |
jmasa@5015 | 1936 | // answer. |
jmasa@5015 | 1937 | if (UseConcMarkSweepGC) { |
jmasa@5015 | 1938 | return allocated_chunks_words(); |
jmasa@5015 | 1939 | } else { |
jmasa@5015 | 1940 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
jmasa@5015 | 1941 | size_t sum = 0; |
jmasa@5015 | 1942 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
jmasa@5015 | 1943 | Metachunk* chunk = chunks_in_use(i); |
jmasa@5015 | 1944 | while (chunk != NULL) { |
stefank@5941 | 1945 | sum += chunk->word_size(); |
jmasa@5015 | 1946 | chunk = chunk->next(); |
jmasa@5015 | 1947 | } |
coleenp@4037 | 1948 | } |
jmasa@5015 | 1949 | return sum; |
coleenp@4037 | 1950 | } |
coleenp@4037 | 1951 | } |
coleenp@4037 | 1952 | |
coleenp@4037 | 1953 | size_t SpaceManager::sum_count_in_chunks_in_use() { |
coleenp@4037 | 1954 | size_t count = 0; |
jmasa@4382 | 1955 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1956 | count = count + sum_count_in_chunks_in_use(i); |
coleenp@4037 | 1957 | } |
jmasa@4196 | 1958 | |
coleenp@4037 | 1959 | return count; |
coleenp@4037 | 1960 | } |
coleenp@4037 | 1961 | |
coleenp@4037 | 1962 | size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
coleenp@4037 | 1963 | size_t count = 0; |
coleenp@4037 | 1964 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1965 | while (chunk != NULL) { |
coleenp@4037 | 1966 | count++; |
coleenp@4037 | 1967 | chunk = chunk->next(); |
coleenp@4037 | 1968 | } |
coleenp@4037 | 1969 | return count; |
coleenp@4037 | 1970 | } |
coleenp@4037 | 1971 | |
coleenp@4037 | 1972 | |
coleenp@4037 | 1973 | size_t SpaceManager::sum_used_in_chunks_in_use() const { |
coleenp@4037 | 1974 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1975 | size_t used = 0; |
jmasa@4382 | 1976 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1977 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1978 | while (chunk != NULL) { |
coleenp@4037 | 1979 | used += chunk->used_word_size(); |
coleenp@4037 | 1980 | chunk = chunk->next(); |
coleenp@4037 | 1981 | } |
coleenp@4037 | 1982 | } |
coleenp@4037 | 1983 | return used; |
coleenp@4037 | 1984 | } |
coleenp@4037 | 1985 | |
coleenp@4037 | 1986 | void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
coleenp@4037 | 1987 | |
jmasa@4382 | 1988 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
jmasa@4382 | 1989 | Metachunk* chunk = chunks_in_use(i); |
jmasa@4382 | 1990 | st->print("SpaceManager: %s " PTR_FORMAT, |
jmasa@4382 | 1991 | chunk_size_name(i), chunk); |
jmasa@4382 | 1992 | if (chunk != NULL) { |
jmasa@4382 | 1993 | st->print_cr(" free " SIZE_FORMAT, |
jmasa@4382 | 1994 | chunk->free_word_size()); |
jmasa@4382 | 1995 | } else { |
drchase@6680 | 1996 | st->cr(); |
jmasa@4382 | 1997 | } |
jmasa@4382 | 1998 | } |
coleenp@4037 | 1999 | |
stefank@5771 | 2000 | chunk_manager()->locked_print_free_chunks(st); |
stefank@5771 | 2001 | chunk_manager()->locked_print_sum_free_chunks(st); |
coleenp@4037 | 2002 | } |
coleenp@4037 | 2003 | |
coleenp@4037 | 2004 | size_t SpaceManager::calc_chunk_size(size_t word_size) { |
coleenp@4037 | 2005 | |
coleenp@4037 | 2006 | // Decide between a small chunk and a medium chunk. Up to |
coleenp@4037 | 2007 | // _small_chunk_limit small chunks can be allocated but |
coleenp@4037 | 2008 | // once a medium chunk has been allocated, no more small |
coleenp@4037 | 2009 | // chunks will be allocated. |
coleenp@4037 | 2010 | size_t chunk_word_size; |
coleenp@4037 | 2011 | if (chunks_in_use(MediumIndex) == NULL && |
coleenp@5337 | 2012 | sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit) { |
jmasa@4382 | 2013 | chunk_word_size = (size_t) small_chunk_size(); |
jmasa@4382 | 2014 | if (word_size + Metachunk::overhead() > small_chunk_size()) { |
jmasa@4382 | 2015 | chunk_word_size = medium_chunk_size(); |
coleenp@4037 | 2016 | } |
coleenp@4037 | 2017 | } else { |
jmasa@4382 | 2018 | chunk_word_size = medium_chunk_size(); |
coleenp@4037 | 2019 | } |
coleenp@4037 | 2020 | |
mgerdin@6004 | 2021 | // Might still need a humongous chunk. Enforce |
mgerdin@6004 | 2022 | // humongous allocations sizes to be aligned up to |
mgerdin@6004 | 2023 | // the smallest chunk size. |
jmasa@4382 | 2024 | size_t if_humongous_sized_chunk = |
jmasa@4382 | 2025 | align_size_up(word_size + Metachunk::overhead(), |
mgerdin@6004 | 2026 | smallest_chunk_size()); |
coleenp@4037 | 2027 | chunk_word_size = |
jmasa@4382 | 2028 | MAX2((size_t) chunk_word_size, if_humongous_sized_chunk); |
jmasa@4382 | 2029 | |
jmasa@4382 | 2030 | assert(!SpaceManager::is_humongous(word_size) || |
jmasa@4382 | 2031 | chunk_word_size == if_humongous_sized_chunk, |
jmasa@4382 | 2032 | err_msg("Size calculation is wrong, word_size " SIZE_FORMAT |
jmasa@4382 | 2033 | " chunk_word_size " SIZE_FORMAT, |
jmasa@4382 | 2034 | word_size, chunk_word_size)); |
coleenp@4037 | 2035 | if (TraceMetadataHumongousAllocation && |
coleenp@4037 | 2036 | SpaceManager::is_humongous(word_size)) { |
coleenp@4037 | 2037 | gclog_or_tty->print_cr("Metadata humongous allocation:"); |
coleenp@4037 | 2038 | gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
coleenp@4037 | 2039 | gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
coleenp@4037 | 2040 | chunk_word_size); |
jmasa@4196 | 2041 | gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
coleenp@4037 | 2042 | Metachunk::overhead()); |
coleenp@4037 | 2043 | } |
coleenp@4037 | 2044 | return chunk_word_size; |
coleenp@4037 | 2045 | } |
coleenp@4037 | 2046 | |
stefank@5864 | 2047 | void SpaceManager::track_metaspace_memory_usage() { |
stefank@5864 | 2048 | if (is_init_completed()) { |
stefank@5864 | 2049 | if (is_class()) { |
stefank@5864 | 2050 | MemoryService::track_compressed_class_memory_usage(); |
stefank@5864 | 2051 | } |
stefank@5864 | 2052 | MemoryService::track_metaspace_memory_usage(); |
stefank@5864 | 2053 | } |
stefank@5864 | 2054 | } |
stefank@5864 | 2055 | |
jmasa@4196 | 2056 | MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
coleenp@4037 | 2057 | assert(vs_list()->current_virtual_space() != NULL, |
coleenp@4037 | 2058 | "Should have been set"); |
coleenp@4037 | 2059 | assert(current_chunk() == NULL || |
coleenp@4037 | 2060 | current_chunk()->allocate(word_size) == NULL, |
coleenp@4037 | 2061 | "Don't need to expand"); |
coleenp@4037 | 2062 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2063 | |
coleenp@4037 | 2064 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2065 | size_t words_left = 0; |
jmasa@4382 | 2066 | size_t words_used = 0; |
jmasa@4382 | 2067 | if (current_chunk() != NULL) { |
jmasa@4382 | 2068 | words_left = current_chunk()->free_word_size(); |
jmasa@4382 | 2069 | words_used = current_chunk()->used_word_size(); |
jmasa@4382 | 2070 | } |
coleenp@4037 | 2071 | gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
jmasa@4382 | 2072 | " words " SIZE_FORMAT " words used " SIZE_FORMAT |
jmasa@4382 | 2073 | " words left", |
jmasa@4382 | 2074 | word_size, words_used, words_left); |
coleenp@4037 | 2075 | } |
coleenp@4037 | 2076 | |
coleenp@4037 | 2077 | // Get another chunk out of the virtual space |
coleenp@4037 | 2078 | size_t grow_chunks_by_words = calc_chunk_size(word_size); |
jmasa@4382 | 2079 | Metachunk* next = get_new_chunk(word_size, grow_chunks_by_words); |
coleenp@4037 | 2080 | |
stefank@5863 | 2081 | MetaWord* mem = NULL; |
stefank@5863 | 2082 | |
coleenp@4037 | 2083 | // If a chunk was available, add it to the in-use chunk list |
coleenp@4037 | 2084 | // and do an allocation from it. |
coleenp@4037 | 2085 | if (next != NULL) { |
coleenp@4037 | 2086 | // Add to this manager's list of chunks in use. |
coleenp@4037 | 2087 | add_chunk(next, false); |
stefank@5863 | 2088 | mem = next->allocate(word_size); |
coleenp@4037 | 2089 | } |
stefank@5863 | 2090 | |
stefank@5864 | 2091 | // Track metaspace memory usage statistic. |
stefank@5864 | 2092 | track_metaspace_memory_usage(); |
stefank@5864 | 2093 | |
stefank@5863 | 2094 | return mem; |
coleenp@4037 | 2095 | } |
coleenp@4037 | 2096 | |
coleenp@4037 | 2097 | void SpaceManager::print_on(outputStream* st) const { |
coleenp@4037 | 2098 | |
jmasa@4382 | 2099 | for (ChunkIndex i = ZeroIndex; |
jmasa@4196 | 2100 | i < NumberOfInUseLists ; |
coleenp@4037 | 2101 | i = next_chunk_index(i) ) { |
coleenp@4037 | 2102 | st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
coleenp@4037 | 2103 | chunks_in_use(i), |
coleenp@4037 | 2104 | chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
coleenp@4037 | 2105 | } |
coleenp@4037 | 2106 | st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
coleenp@4037 | 2107 | " Humongous " SIZE_FORMAT, |
coleenp@4037 | 2108 | sum_waste_in_chunks_in_use(SmallIndex), |
coleenp@4037 | 2109 | sum_waste_in_chunks_in_use(MediumIndex), |
coleenp@4037 | 2110 | sum_waste_in_chunks_in_use(HumongousIndex)); |
jmasa@4196 | 2111 | // block free lists |
jmasa@4196 | 2112 | if (block_freelists() != NULL) { |
jmasa@4196 | 2113 | st->print_cr("total in block free lists " SIZE_FORMAT, |
jmasa@4196 | 2114 | block_freelists()->total_size()); |
jmasa@4196 | 2115 | } |
coleenp@4037 | 2116 | } |
coleenp@4037 | 2117 | |
jmasa@5162 | 2118 | SpaceManager::SpaceManager(Metaspace::MetadataType mdtype, |
stefank@5771 | 2119 | Mutex* lock) : |
jmasa@5162 | 2120 | _mdtype(mdtype), |
jmasa@5015 | 2121 | _allocated_blocks_words(0), |
jmasa@5015 | 2122 | _allocated_chunks_words(0), |
jmasa@5015 | 2123 | _allocated_chunks_count(0), |
jmasa@4382 | 2124 | _lock(lock) |
jmasa@4382 | 2125 | { |
jmasa@4382 | 2126 | initialize(); |
jmasa@4382 | 2127 | } |
jmasa@4382 | 2128 | |
jmasa@5015 | 2129 | void SpaceManager::inc_size_metrics(size_t words) { |
jmasa@5015 | 2130 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5015 | 2131 | // Total of allocated Metachunks and allocated Metachunks count |
jmasa@5015 | 2132 | // for each SpaceManager |
jmasa@5015 | 2133 | _allocated_chunks_words = _allocated_chunks_words + words; |
jmasa@5015 | 2134 | _allocated_chunks_count++; |
jmasa@5015 | 2135 | // Global total of capacity in allocated Metachunks |
jmasa@5162 | 2136 | MetaspaceAux::inc_capacity(mdtype(), words); |
jmasa@5015 | 2137 | // Global total of allocated Metablocks. |
jmasa@5015 | 2138 | // used_words_slow() includes the overhead in each |
jmasa@5015 | 2139 | // Metachunk so include it in the used when the |
jmasa@5015 | 2140 | // Metachunk is first added (so only added once per |
jmasa@5015 | 2141 | // Metachunk). |
jmasa@5162 | 2142 | MetaspaceAux::inc_used(mdtype(), Metachunk::overhead()); |
jmasa@5015 | 2143 | } |
jmasa@5015 | 2144 | |
jmasa@5015 | 2145 | void SpaceManager::inc_used_metrics(size_t words) { |
jmasa@5015 | 2146 | // Add to the per SpaceManager total |
jmasa@5015 | 2147 | Atomic::add_ptr(words, &_allocated_blocks_words); |
jmasa@5015 | 2148 | // Add to the global total |
jmasa@5162 | 2149 | MetaspaceAux::inc_used(mdtype(), words); |
jmasa@5015 | 2150 | } |
jmasa@5015 | 2151 | |
jmasa@5015 | 2152 | void SpaceManager::dec_total_from_size_metrics() { |
jmasa@5162 | 2153 | MetaspaceAux::dec_capacity(mdtype(), allocated_chunks_words()); |
jmasa@5162 | 2154 | MetaspaceAux::dec_used(mdtype(), allocated_blocks_words()); |
jmasa@5015 | 2155 | // Also deduct the overhead per Metachunk |
jmasa@5162 | 2156 | MetaspaceAux::dec_used(mdtype(), allocated_chunks_count() * Metachunk::overhead()); |
jmasa@5015 | 2157 | } |
jmasa@5015 | 2158 | |
jmasa@4382 | 2159 | void SpaceManager::initialize() { |
coleenp@4037 | 2160 | Metadebug::init_allocation_fail_alot_count(); |
jmasa@4382 | 2161 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 2162 | _chunks_in_use[i] = NULL; |
coleenp@4037 | 2163 | } |
coleenp@4037 | 2164 | _current_chunk = NULL; |
coleenp@4037 | 2165 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2166 | gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 2167 | } |
coleenp@4037 | 2168 | } |
coleenp@4037 | 2169 | |
jmasa@4932 | 2170 | void ChunkManager::return_chunks(ChunkIndex index, Metachunk* chunks) { |
jmasa@4932 | 2171 | if (chunks == NULL) { |
jmasa@4932 | 2172 | return; |
jmasa@4932 | 2173 | } |
jmasa@4932 | 2174 | ChunkList* list = free_chunks(index); |
jmasa@4932 | 2175 | assert(list->size() == chunks->word_size(), "Mismatch in chunk sizes"); |
jmasa@4932 | 2176 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@4932 | 2177 | Metachunk* cur = chunks; |
jmasa@4932 | 2178 | |
jmasa@5007 | 2179 | // This returns chunks one at a time. If a new |
jmasa@4932 | 2180 | // class List can be created that is a base class |
jmasa@4932 | 2181 | // of FreeList then something like FreeList::prepend() |
jmasa@4932 | 2182 | // can be used in place of this loop |
jmasa@4932 | 2183 | while (cur != NULL) { |
jmasa@5007 | 2184 | assert(cur->container() != NULL, "Container should have been set"); |
jmasa@5007 | 2185 | cur->container()->dec_container_count(); |
jmasa@4932 | 2186 | // Capture the next link before it is changed |
jmasa@4932 | 2187 | // by the call to return_chunk_at_head(); |
jmasa@4932 | 2188 | Metachunk* next = cur->next(); |
stefank@5941 | 2189 | DEBUG_ONLY(cur->set_is_tagged_free(true);) |
jmasa@4932 | 2190 | list->return_chunk_at_head(cur); |
jmasa@4932 | 2191 | cur = next; |
jmasa@4932 | 2192 | } |
jmasa@4932 | 2193 | } |
jmasa@4932 | 2194 | |
coleenp@4037 | 2195 | SpaceManager::~SpaceManager() { |
mgerdin@4784 | 2196 | // This call this->_lock which can't be done while holding expand_lock() |
jmasa@5015 | 2197 | assert(sum_capacity_in_chunks_in_use() == allocated_chunks_words(), |
jmasa@5015 | 2198 | err_msg("sum_capacity_in_chunks_in_use() " SIZE_FORMAT |
jmasa@5015 | 2199 | " allocated_chunks_words() " SIZE_FORMAT, |
jmasa@5015 | 2200 | sum_capacity_in_chunks_in_use(), allocated_chunks_words())); |
mgerdin@4784 | 2201 | |
coleenp@4037 | 2202 | MutexLockerEx fcl(SpaceManager::expand_lock(), |
coleenp@4037 | 2203 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2204 | |
stefank@5771 | 2205 | chunk_manager()->slow_locked_verify(); |
coleenp@4037 | 2206 | |
jmasa@5015 | 2207 | dec_total_from_size_metrics(); |
jmasa@5015 | 2208 | |
coleenp@4037 | 2209 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2210 | gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 2211 | locked_print_chunks_in_use_on(gclog_or_tty); |
coleenp@4037 | 2212 | } |
coleenp@4037 | 2213 | |
jmasa@5007 | 2214 | // Do not mangle freed Metachunks. The chunk size inside Metachunks |
jmasa@5007 | 2215 | // is during the freeing of a VirtualSpaceNodes. |
coleenp@4304 | 2216 | |
coleenp@4037 | 2217 | // Have to update before the chunks_in_use lists are emptied |
coleenp@4037 | 2218 | // below. |
stefank@5771 | 2219 | chunk_manager()->inc_free_chunks_total(allocated_chunks_words(), |
stefank@5771 | 2220 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 2221 | |
coleenp@4037 | 2222 | // Add all the chunks in use by this space manager |
coleenp@4037 | 2223 | // to the global list of free chunks. |
coleenp@4037 | 2224 | |
jmasa@4382 | 2225 | // Follow each list of chunks-in-use and add them to the |
jmasa@4382 | 2226 | // free lists. Each list is NULL terminated. |
jmasa@4382 | 2227 | |
jmasa@4382 | 2228 | for (ChunkIndex i = ZeroIndex; i < HumongousIndex; i = next_chunk_index(i)) { |
jmasa@4382 | 2229 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2230 | gclog_or_tty->print_cr("returned %d %s chunks to freelist", |
jmasa@4382 | 2231 | sum_count_in_chunks_in_use(i), |
jmasa@4382 | 2232 | chunk_size_name(i)); |
jmasa@4382 | 2233 | } |
jmasa@4382 | 2234 | Metachunk* chunks = chunks_in_use(i); |
stefank@5771 | 2235 | chunk_manager()->return_chunks(i, chunks); |
jmasa@4382 | 2236 | set_chunks_in_use(i, NULL); |
jmasa@4382 | 2237 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2238 | gclog_or_tty->print_cr("updated freelist count %d %s", |
stefank@5771 | 2239 | chunk_manager()->free_chunks(i)->count(), |
jmasa@4382 | 2240 | chunk_size_name(i)); |
jmasa@4382 | 2241 | } |
jmasa@4382 | 2242 | assert(i != HumongousIndex, "Humongous chunks are handled explicitly later"); |
coleenp@4037 | 2243 | } |
coleenp@4037 | 2244 | |
jmasa@4382 | 2245 | // The medium chunk case may be optimized by passing the head and |
jmasa@4382 | 2246 | // tail of the medium chunk list to add_at_head(). The tail is often |
jmasa@4382 | 2247 | // the current chunk but there are probably exceptions. |
jmasa@4382 | 2248 | |
coleenp@4037 | 2249 | // Humongous chunks |
jmasa@4382 | 2250 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2251 | gclog_or_tty->print_cr("returned %d %s humongous chunks to dictionary", |
jmasa@4382 | 2252 | sum_count_in_chunks_in_use(HumongousIndex), |
jmasa@4382 | 2253 | chunk_size_name(HumongousIndex)); |
jmasa@4382 | 2254 | gclog_or_tty->print("Humongous chunk dictionary: "); |
jmasa@4382 | 2255 | } |
coleenp@4037 | 2256 | // Humongous chunks are never the current chunk. |
coleenp@4037 | 2257 | Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
coleenp@4037 | 2258 | |
jmasa@4196 | 2259 | while (humongous_chunks != NULL) { |
jmasa@4196 | 2260 | #ifdef ASSERT |
stefank@5941 | 2261 | humongous_chunks->set_is_tagged_free(true); |
jmasa@4196 | 2262 | #endif |
jmasa@4382 | 2263 | if (TraceMetadataChunkAllocation && Verbose) { |
jmasa@4382 | 2264 | gclog_or_tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", |
jmasa@4382 | 2265 | humongous_chunks, |
jmasa@4382 | 2266 | humongous_chunks->word_size()); |
jmasa@4382 | 2267 | } |
jmasa@4382 | 2268 | assert(humongous_chunks->word_size() == (size_t) |
jmasa@4382 | 2269 | align_size_up(humongous_chunks->word_size(), |
mgerdin@6004 | 2270 | smallest_chunk_size()), |
jmasa@4382 | 2271 | err_msg("Humongous chunk size is wrong: word size " SIZE_FORMAT |
mikael@4548 | 2272 | " granularity %d", |
mgerdin@6004 | 2273 | humongous_chunks->word_size(), smallest_chunk_size())); |
jmasa@4196 | 2274 | Metachunk* next_humongous_chunks = humongous_chunks->next(); |
jmasa@5007 | 2275 | humongous_chunks->container()->dec_container_count(); |
stefank@5771 | 2276 | chunk_manager()->humongous_dictionary()->return_chunk(humongous_chunks); |
jmasa@4196 | 2277 | humongous_chunks = next_humongous_chunks; |
coleenp@4037 | 2278 | } |
jmasa@4382 | 2279 | if (TraceMetadataChunkAllocation && Verbose) { |
drchase@6680 | 2280 | gclog_or_tty->cr(); |
jmasa@4382 | 2281 | gclog_or_tty->print_cr("updated dictionary count %d %s", |
stefank@5771 | 2282 | chunk_manager()->humongous_dictionary()->total_count(), |
jmasa@4382 | 2283 | chunk_size_name(HumongousIndex)); |
jmasa@4382 | 2284 | } |
stefank@5771 | 2285 | chunk_manager()->slow_locked_verify(); |
coleenp@4037 | 2286 | } |
coleenp@4037 | 2287 | |
jmasa@4382 | 2288 | const char* SpaceManager::chunk_size_name(ChunkIndex index) const { |
jmasa@4382 | 2289 | switch (index) { |
jmasa@4382 | 2290 | case SpecializedIndex: |
jmasa@4382 | 2291 | return "Specialized"; |
jmasa@4382 | 2292 | case SmallIndex: |
jmasa@4382 | 2293 | return "Small"; |
jmasa@4382 | 2294 | case MediumIndex: |
jmasa@4382 | 2295 | return "Medium"; |
jmasa@4382 | 2296 | case HumongousIndex: |
jmasa@4382 | 2297 | return "Humongous"; |
jmasa@4382 | 2298 | default: |
jmasa@4382 | 2299 | return NULL; |
jmasa@4382 | 2300 | } |
jmasa@4382 | 2301 | } |
jmasa@4382 | 2302 | |
jmasa@4382 | 2303 | ChunkIndex ChunkManager::list_index(size_t size) { |
jmasa@4382 | 2304 | switch (size) { |
jmasa@4382 | 2305 | case SpecializedChunk: |
jmasa@4382 | 2306 | assert(SpecializedChunk == ClassSpecializedChunk, |
jmasa@4382 | 2307 | "Need branch for ClassSpecializedChunk"); |
jmasa@4382 | 2308 | return SpecializedIndex; |
jmasa@4382 | 2309 | case SmallChunk: |
jmasa@4382 | 2310 | case ClassSmallChunk: |
jmasa@4382 | 2311 | return SmallIndex; |
jmasa@4382 | 2312 | case MediumChunk: |
jmasa@4382 | 2313 | case ClassMediumChunk: |
jmasa@4382 | 2314 | return MediumIndex; |
jmasa@4382 | 2315 | default: |
jmasa@4383 | 2316 | assert(size > MediumChunk || size > ClassMediumChunk, |
jmasa@4382 | 2317 | "Not a humongous chunk"); |
jmasa@4382 | 2318 | return HumongousIndex; |
jmasa@4382 | 2319 | } |
jmasa@4382 | 2320 | } |
jmasa@4382 | 2321 | |
jmasa@4196 | 2322 | void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
coleenp@4037 | 2323 | assert_lock_strong(_lock); |
fparain@5452 | 2324 | size_t raw_word_size = get_raw_word_size(word_size); |
goetz@6337 | 2325 | size_t min_size = TreeChunk<Metablock, FreeList<Metablock> >::min_size(); |
fparain@5452 | 2326 | assert(raw_word_size >= min_size, |
hseigel@5528 | 2327 | err_msg("Should not deallocate dark matter " SIZE_FORMAT "<" SIZE_FORMAT, word_size, min_size)); |
fparain@5452 | 2328 | block_freelists()->return_block(p, raw_word_size); |
coleenp@4037 | 2329 | } |
coleenp@4037 | 2330 | |
coleenp@4037 | 2331 | // Adds a chunk to the list of chunks in use. |
coleenp@4037 | 2332 | void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
coleenp@4037 | 2333 | |
coleenp@4037 | 2334 | assert(new_chunk != NULL, "Should not be NULL"); |
coleenp@4037 | 2335 | assert(new_chunk->next() == NULL, "Should not be on a list"); |
coleenp@4037 | 2336 | |
coleenp@4037 | 2337 | new_chunk->reset_empty(); |
coleenp@4037 | 2338 | |
coleenp@4037 | 2339 | // Find the correct list and and set the current |
coleenp@4037 | 2340 | // chunk for that list. |
jmasa@4382 | 2341 | ChunkIndex index = ChunkManager::list_index(new_chunk->word_size()); |
jmasa@4382 | 2342 | |
jmasa@4382 | 2343 | if (index != HumongousIndex) { |
mgerdin@5699 | 2344 | retire_current_chunk(); |
coleenp@4037 | 2345 | set_current_chunk(new_chunk); |
jmasa@4382 | 2346 | new_chunk->set_next(chunks_in_use(index)); |
jmasa@4382 | 2347 | set_chunks_in_use(index, new_chunk); |
jmasa@4382 | 2348 | } else { |
coleenp@4037 | 2349 | // For null class loader data and DumpSharedSpaces, the first chunk isn't |
coleenp@4037 | 2350 | // small, so small will be null. Link this first chunk as the current |
coleenp@4037 | 2351 | // chunk. |
coleenp@4037 | 2352 | if (make_current) { |
coleenp@4037 | 2353 | // Set as the current chunk but otherwise treat as a humongous chunk. |
coleenp@4037 | 2354 | set_current_chunk(new_chunk); |
coleenp@4037 | 2355 | } |
coleenp@4037 | 2356 | // Link at head. The _current_chunk only points to a humongous chunk for |
coleenp@4037 | 2357 | // the null class loader metaspace (class and data virtual space managers) |
coleenp@4037 | 2358 | // any humongous chunks so will not point to the tail |
coleenp@4037 | 2359 | // of the humongous chunks list. |
coleenp@4037 | 2360 | new_chunk->set_next(chunks_in_use(HumongousIndex)); |
coleenp@4037 | 2361 | set_chunks_in_use(HumongousIndex, new_chunk); |
coleenp@4037 | 2362 | |
jmasa@4383 | 2363 | assert(new_chunk->word_size() > medium_chunk_size(), "List inconsistency"); |
coleenp@4037 | 2364 | } |
coleenp@4037 | 2365 | |
jmasa@5015 | 2366 | // Add to the running sum of capacity |
jmasa@5015 | 2367 | inc_size_metrics(new_chunk->word_size()); |
jmasa@5015 | 2368 | |
coleenp@4037 | 2369 | assert(new_chunk->is_empty(), "Not ready for reuse"); |
coleenp@4037 | 2370 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2371 | gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
coleenp@4037 | 2372 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 2373 | new_chunk->print_on(gclog_or_tty); |
stefank@5771 | 2374 | chunk_manager()->locked_print_free_chunks(gclog_or_tty); |
coleenp@4037 | 2375 | } |
coleenp@4037 | 2376 | } |
coleenp@4037 | 2377 | |
mgerdin@5699 | 2378 | void SpaceManager::retire_current_chunk() { |
mgerdin@5699 | 2379 | if (current_chunk() != NULL) { |
mgerdin@5699 | 2380 | size_t remaining_words = current_chunk()->free_word_size(); |
goetz@6337 | 2381 | if (remaining_words >= TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
mgerdin@5699 | 2382 | block_freelists()->return_block(current_chunk()->allocate(remaining_words), remaining_words); |
mgerdin@5699 | 2383 | inc_used_metrics(remaining_words); |
mgerdin@5699 | 2384 | } |
mgerdin@5699 | 2385 | } |
mgerdin@5699 | 2386 | } |
mgerdin@5699 | 2387 | |
jmasa@4382 | 2388 | Metachunk* SpaceManager::get_new_chunk(size_t word_size, |
jmasa@4382 | 2389 | size_t grow_chunks_by_words) { |
stefank@5771 | 2390 | // Get a chunk from the chunk freelist |
stefank@5771 | 2391 | Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
stefank@5771 | 2392 | |
stefank@5771 | 2393 | if (next == NULL) { |
stefank@5771 | 2394 | next = vs_list()->get_new_chunk(word_size, |
stefank@5771 | 2395 | grow_chunks_by_words, |
stefank@5771 | 2396 | medium_chunk_bunch()); |
stefank@5771 | 2397 | } |
jmasa@4382 | 2398 | |
stefank@5707 | 2399 | if (TraceMetadataHumongousAllocation && next != NULL && |
jmasa@4382 | 2400 | SpaceManager::is_humongous(next->word_size())) { |
stefank@5707 | 2401 | gclog_or_tty->print_cr(" new humongous chunk word size " |
stefank@5707 | 2402 | PTR_FORMAT, next->word_size()); |
jmasa@4382 | 2403 | } |
jmasa@4382 | 2404 | |
jmasa@4382 | 2405 | return next; |
jmasa@4382 | 2406 | } |
jmasa@4382 | 2407 | |
coleenp@4037 | 2408 | MetaWord* SpaceManager::allocate(size_t word_size) { |
coleenp@4037 | 2409 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2410 | |
iklam@5208 | 2411 | size_t raw_word_size = get_raw_word_size(word_size); |
coleenp@4037 | 2412 | BlockFreelist* fl = block_freelists(); |
jmasa@4196 | 2413 | MetaWord* p = NULL; |
coleenp@4037 | 2414 | // Allocation from the dictionary is expensive in the sense that |
coleenp@4037 | 2415 | // the dictionary has to be searched for a size. Don't allocate |
coleenp@4037 | 2416 | // from the dictionary until it starts to get fat. Is this |
coleenp@4037 | 2417 | // a reasonable policy? Maybe an skinny dictionary is fast enough |
coleenp@4037 | 2418 | // for allocations. Do some profiling. JJJ |
jmasa@4196 | 2419 | if (fl->total_size() > allocation_from_dictionary_limit) { |
jmasa@4196 | 2420 | p = fl->get_block(raw_word_size); |
coleenp@4037 | 2421 | } |
jmasa@4196 | 2422 | if (p == NULL) { |
jmasa@4196 | 2423 | p = allocate_work(raw_word_size); |
coleenp@4037 | 2424 | } |
coleenp@4037 | 2425 | |
jmasa@4196 | 2426 | return p; |
coleenp@4037 | 2427 | } |
coleenp@4037 | 2428 | |
coleenp@4037 | 2429 | // Returns the address of spaced allocated for "word_size". |
coleenp@4037 | 2430 | // This methods does not know about blocks (Metablocks) |
jmasa@4196 | 2431 | MetaWord* SpaceManager::allocate_work(size_t word_size) { |
coleenp@4037 | 2432 | assert_lock_strong(_lock); |
coleenp@4037 | 2433 | #ifdef ASSERT |
coleenp@4037 | 2434 | if (Metadebug::test_metadata_failure()) { |
coleenp@4037 | 2435 | return NULL; |
coleenp@4037 | 2436 | } |
coleenp@4037 | 2437 | #endif |
coleenp@4037 | 2438 | // Is there space in the current chunk? |
jmasa@4196 | 2439 | MetaWord* result = NULL; |
coleenp@4037 | 2440 | |
coleenp@4037 | 2441 | // For DumpSharedSpaces, only allocate out of the current chunk which is |
coleenp@4037 | 2442 | // never null because we gave it the size we wanted. Caller reports out |
coleenp@4037 | 2443 | // of memory if this returns null. |
coleenp@4037 | 2444 | if (DumpSharedSpaces) { |
coleenp@4037 | 2445 | assert(current_chunk() != NULL, "should never happen"); |
jmasa@5015 | 2446 | inc_used_metrics(word_size); |
coleenp@4037 | 2447 | return current_chunk()->allocate(word_size); // caller handles null result |
coleenp@4037 | 2448 | } |
stefank@5863 | 2449 | |
coleenp@4037 | 2450 | if (current_chunk() != NULL) { |
coleenp@4037 | 2451 | result = current_chunk()->allocate(word_size); |
coleenp@4037 | 2452 | } |
coleenp@4037 | 2453 | |
coleenp@4037 | 2454 | if (result == NULL) { |
coleenp@4037 | 2455 | result = grow_and_allocate(word_size); |
coleenp@4037 | 2456 | } |
stefank@5863 | 2457 | |
stefank@5863 | 2458 | if (result != NULL) { |
jmasa@5015 | 2459 | inc_used_metrics(word_size); |
jmasa@4196 | 2460 | assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
jmasa@4196 | 2461 | "Head of the list is being allocated"); |
coleenp@4037 | 2462 | } |
coleenp@4037 | 2463 | |
coleenp@4037 | 2464 | return result; |
coleenp@4037 | 2465 | } |
coleenp@4037 | 2466 | |
coleenp@4037 | 2467 | void SpaceManager::verify() { |
coleenp@4037 | 2468 | // If there are blocks in the dictionary, then |
coleenp@4037 | 2469 | // verfication of chunks does not work since |
coleenp@4037 | 2470 | // being in the dictionary alters a chunk. |
jmasa@4196 | 2471 | if (block_freelists()->total_size() == 0) { |
jmasa@4382 | 2472 | for (ChunkIndex i = ZeroIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 2473 | Metachunk* curr = chunks_in_use(i); |
coleenp@4037 | 2474 | while (curr != NULL) { |
coleenp@4037 | 2475 | curr->verify(); |
jmasa@4327 | 2476 | verify_chunk_size(curr); |
coleenp@4037 | 2477 | curr = curr->next(); |
coleenp@4037 | 2478 | } |
coleenp@4037 | 2479 | } |
coleenp@4037 | 2480 | } |
coleenp@4037 | 2481 | } |
coleenp@4037 | 2482 | |
jmasa@4327 | 2483 | void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
jmasa@4327 | 2484 | assert(is_humongous(chunk->word_size()) || |
jmasa@4382 | 2485 | chunk->word_size() == medium_chunk_size() || |
jmasa@4382 | 2486 | chunk->word_size() == small_chunk_size() || |
jmasa@4382 | 2487 | chunk->word_size() == specialized_chunk_size(), |
jmasa@4327 | 2488 | "Chunk size is wrong"); |
jmasa@4327 | 2489 | return; |
jmasa@4327 | 2490 | } |
jmasa@4327 | 2491 | |
coleenp@4037 | 2492 | #ifdef ASSERT |
jmasa@5015 | 2493 | void SpaceManager::verify_allocated_blocks_words() { |
coleenp@4037 | 2494 | // Verification is only guaranteed at a safepoint. |
jmasa@5015 | 2495 | assert(SafepointSynchronize::is_at_safepoint() || !Universe::is_fully_initialized(), |
jmasa@5015 | 2496 | "Verification can fail if the applications is running"); |
jmasa@5015 | 2497 | assert(allocated_blocks_words() == sum_used_in_chunks_in_use(), |
mikael@4548 | 2498 | err_msg("allocation total is not consistent " SIZE_FORMAT |
mikael@4548 | 2499 | " vs " SIZE_FORMAT, |
jmasa@5015 | 2500 | allocated_blocks_words(), sum_used_in_chunks_in_use())); |
coleenp@4037 | 2501 | } |
coleenp@4037 | 2502 | |
coleenp@4037 | 2503 | #endif |
coleenp@4037 | 2504 | |
coleenp@4037 | 2505 | void SpaceManager::dump(outputStream* const out) const { |
coleenp@4037 | 2506 | size_t curr_total = 0; |
coleenp@4037 | 2507 | size_t waste = 0; |
coleenp@4037 | 2508 | uint i = 0; |
coleenp@4037 | 2509 | size_t used = 0; |
coleenp@4037 | 2510 | size_t capacity = 0; |
coleenp@4037 | 2511 | |
coleenp@4037 | 2512 | // Add up statistics for all chunks in this SpaceManager. |
jmasa@4382 | 2513 | for (ChunkIndex index = ZeroIndex; |
jmasa@4196 | 2514 | index < NumberOfInUseLists; |
coleenp@4037 | 2515 | index = next_chunk_index(index)) { |
coleenp@4037 | 2516 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2517 | curr != NULL; |
coleenp@4037 | 2518 | curr = curr->next()) { |
coleenp@4037 | 2519 | out->print("%d) ", i++); |
coleenp@4037 | 2520 | curr->print_on(out); |
coleenp@4037 | 2521 | curr_total += curr->word_size(); |
coleenp@4037 | 2522 | used += curr->used_word_size(); |
stefank@5941 | 2523 | capacity += curr->word_size(); |
coleenp@4037 | 2524 | waste += curr->free_word_size() + curr->overhead();; |
coleenp@4037 | 2525 | } |
coleenp@4037 | 2526 | } |
coleenp@4037 | 2527 | |
stefank@5707 | 2528 | if (TraceMetadataChunkAllocation && Verbose) { |
stefank@5707 | 2529 | block_freelists()->print_on(out); |
stefank@5707 | 2530 | } |
stefank@5707 | 2531 | |
jmasa@4382 | 2532 | size_t free = current_chunk() == NULL ? 0 : current_chunk()->free_word_size(); |
coleenp@4037 | 2533 | // Free space isn't wasted. |
coleenp@4037 | 2534 | waste -= free; |
coleenp@4037 | 2535 | |
coleenp@4037 | 2536 | out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
coleenp@4037 | 2537 | " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
coleenp@4037 | 2538 | " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
coleenp@4037 | 2539 | } |
coleenp@4037 | 2540 | |
coleenp@4304 | 2541 | #ifndef PRODUCT |
coleenp@4037 | 2542 | void SpaceManager::mangle_freed_chunks() { |
jmasa@4382 | 2543 | for (ChunkIndex index = ZeroIndex; |
jmasa@4196 | 2544 | index < NumberOfInUseLists; |
coleenp@4037 | 2545 | index = next_chunk_index(index)) { |
coleenp@4037 | 2546 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2547 | curr != NULL; |
coleenp@4037 | 2548 | curr = curr->next()) { |
coleenp@4037 | 2549 | curr->mangle(); |
coleenp@4037 | 2550 | } |
coleenp@4037 | 2551 | } |
coleenp@4037 | 2552 | } |
coleenp@4304 | 2553 | #endif // PRODUCT |
coleenp@4037 | 2554 | |
coleenp@4037 | 2555 | // MetaspaceAux |
coleenp@4037 | 2556 | |
jmasa@5015 | 2557 | |
ehelin@6609 | 2558 | size_t MetaspaceAux::_capacity_words[] = {0, 0}; |
ehelin@6609 | 2559 | size_t MetaspaceAux::_used_words[] = {0, 0}; |
jmasa@5015 | 2560 | |
ehelin@5531 | 2561 | size_t MetaspaceAux::free_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5531 | 2562 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
ehelin@5531 | 2563 | return list == NULL ? 0 : list->free_bytes(); |
ehelin@5531 | 2564 | } |
ehelin@5531 | 2565 | |
jmasa@5015 | 2566 | size_t MetaspaceAux::free_bytes() { |
ehelin@5531 | 2567 | return free_bytes(Metaspace::ClassType) + free_bytes(Metaspace::NonClassType); |
jmasa@5015 | 2568 | } |
jmasa@5015 | 2569 | |
jmasa@5162 | 2570 | void MetaspaceAux::dec_capacity(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5015 | 2571 | assert_lock_strong(SpaceManager::expand_lock()); |
ehelin@6609 | 2572 | assert(words <= capacity_words(mdtype), |
jmasa@5015 | 2573 | err_msg("About to decrement below 0: words " SIZE_FORMAT |
ehelin@6609 | 2574 | " is greater than _capacity_words[%u] " SIZE_FORMAT, |
ehelin@6609 | 2575 | words, mdtype, capacity_words(mdtype))); |
ehelin@6609 | 2576 | _capacity_words[mdtype] -= words; |
jmasa@5015 | 2577 | } |
jmasa@5015 | 2578 | |
jmasa@5162 | 2579 | void MetaspaceAux::inc_capacity(Metaspace::MetadataType mdtype, size_t words) { |
jmasa@5015 | 2580 | assert_lock_strong(SpaceManager::expand_lock()); |
jmasa@5015 | 2581 | // Needs to be atomic |
ehelin@6609 | 2582 | _capacity_words[mdtype] += words; |
jmasa@5015 | 2583 | } |
jmasa@5015 | 2584 | |
jmasa@5162 | 2585 | void MetaspaceAux::dec_used(Metaspace::MetadataType mdtype, size_t words) { |
ehelin@6609 | 2586 | assert(words <= used_words(mdtype), |
jmasa@5015 | 2587 | err_msg("About to decrement below 0: words " SIZE_FORMAT |
ehelin@6609 | 2588 | " is greater than _used_words[%u] " SIZE_FORMAT, |
ehelin@6609 | 2589 | words, mdtype, used_words(mdtype))); |
jmasa@5015 | 2590 | // For CMS deallocation of the Metaspaces occurs during the |
jmasa@5015 | 2591 | // sweep which is a concurrent phase. Protection by the expand_lock() |
jmasa@5015 | 2592 | // is not enough since allocation is on a per Metaspace basis |
jmasa@5015 | 2593 | // and protected by the Metaspace lock. |
jmasa@5015 | 2594 | jlong minus_words = (jlong) - (jlong) words; |
ehelin@6609 | 2595 | Atomic::add_ptr(minus_words, &_used_words[mdtype]); |
jmasa@5015 | 2596 | } |
jmasa@5015 | 2597 | |
jmasa@5162 | 2598 | void MetaspaceAux::inc_used(Metaspace::MetadataType mdtype, size_t words) { |
ehelin@6609 | 2599 | // _used_words tracks allocations for |
jmasa@5015 | 2600 | // each piece of metadata. Those allocations are |
jmasa@5015 | 2601 | // generally done concurrently by different application |
jmasa@5015 | 2602 | // threads so must be done atomically. |
ehelin@6609 | 2603 | Atomic::add_ptr(words, &_used_words[mdtype]); |
jmasa@5015 | 2604 | } |
jmasa@5015 | 2605 | |
jmasa@5015 | 2606 | size_t MetaspaceAux::used_bytes_slow(Metaspace::MetadataType mdtype) { |
jmasa@4042 | 2607 | size_t used = 0; |
jmasa@4042 | 2608 | ClassLoaderDataGraphMetaspaceIterator iter; |
jmasa@4042 | 2609 | while (iter.repeat()) { |
jmasa@4042 | 2610 | Metaspace* msp = iter.get_next(); |
jmasa@5015 | 2611 | // Sum allocated_blocks_words for each metaspace |
jmasa@4042 | 2612 | if (msp != NULL) { |
jmasa@5015 | 2613 | used += msp->used_words_slow(mdtype); |
jmasa@4042 | 2614 | } |
jmasa@4042 | 2615 | } |
jmasa@4042 | 2616 | return used * BytesPerWord; |
jmasa@4042 | 2617 | } |
jmasa@4042 | 2618 | |
ehelin@5703 | 2619 | size_t MetaspaceAux::free_bytes_slow(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2620 | size_t free = 0; |
coleenp@4037 | 2621 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2622 | while (iter.repeat()) { |
coleenp@4037 | 2623 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2624 | if (msp != NULL) { |
ehelin@5703 | 2625 | free += msp->free_words_slow(mdtype); |
coleenp@4037 | 2626 | } |
coleenp@4037 | 2627 | } |
coleenp@4037 | 2628 | return free * BytesPerWord; |
coleenp@4037 | 2629 | } |
coleenp@4037 | 2630 | |
jmasa@5015 | 2631 | size_t MetaspaceAux::capacity_bytes_slow(Metaspace::MetadataType mdtype) { |
hseigel@5528 | 2632 | if ((mdtype == Metaspace::ClassType) && !Metaspace::using_class_space()) { |
hseigel@5528 | 2633 | return 0; |
hseigel@5528 | 2634 | } |
jmasa@5015 | 2635 | // Don't count the space in the freelists. That space will be |
jmasa@5015 | 2636 | // added to the capacity calculation as needed. |
jmasa@5015 | 2637 | size_t capacity = 0; |
coleenp@4037 | 2638 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2639 | while (iter.repeat()) { |
coleenp@4037 | 2640 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2641 | if (msp != NULL) { |
jmasa@5015 | 2642 | capacity += msp->capacity_words_slow(mdtype); |
coleenp@4037 | 2643 | } |
coleenp@4037 | 2644 | } |
coleenp@4037 | 2645 | return capacity * BytesPerWord; |
coleenp@4037 | 2646 | } |
coleenp@4037 | 2647 | |
ehelin@5703 | 2648 | size_t MetaspaceAux::capacity_bytes_slow() { |
ehelin@5703 | 2649 | #ifdef PRODUCT |
ehelin@6609 | 2650 | // Use capacity_bytes() in PRODUCT instead of this function. |
ehelin@5703 | 2651 | guarantee(false, "Should not call capacity_bytes_slow() in the PRODUCT"); |
ehelin@5703 | 2652 | #endif |
ehelin@5703 | 2653 | size_t class_capacity = capacity_bytes_slow(Metaspace::ClassType); |
ehelin@5703 | 2654 | size_t non_class_capacity = capacity_bytes_slow(Metaspace::NonClassType); |
ehelin@6609 | 2655 | assert(capacity_bytes() == class_capacity + non_class_capacity, |
ehelin@6609 | 2656 | err_msg("bad accounting: capacity_bytes() " SIZE_FORMAT |
ehelin@5703 | 2657 | " class_capacity + non_class_capacity " SIZE_FORMAT |
ehelin@5703 | 2658 | " class_capacity " SIZE_FORMAT " non_class_capacity " SIZE_FORMAT, |
ehelin@6609 | 2659 | capacity_bytes(), class_capacity + non_class_capacity, |
ehelin@5703 | 2660 | class_capacity, non_class_capacity)); |
ehelin@5703 | 2661 | |
ehelin@5703 | 2662 | return class_capacity + non_class_capacity; |
ehelin@5703 | 2663 | } |
ehelin@5703 | 2664 | |
ehelin@5703 | 2665 | size_t MetaspaceAux::reserved_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5531 | 2666 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
stefank@5704 | 2667 | return list == NULL ? 0 : list->reserved_bytes(); |
stefank@5704 | 2668 | } |
stefank@5704 | 2669 | |
stefank@5704 | 2670 | size_t MetaspaceAux::committed_bytes(Metaspace::MetadataType mdtype) { |
stefank@5704 | 2671 | VirtualSpaceList* list = Metaspace::get_space_list(mdtype); |
stefank@5704 | 2672 | return list == NULL ? 0 : list->committed_bytes(); |
coleenp@4037 | 2673 | } |
coleenp@4037 | 2674 | |
ehelin@5703 | 2675 | size_t MetaspaceAux::min_chunk_size_words() { return Metaspace::first_chunk_word_size(); } |
ehelin@5703 | 2676 | |
ehelin@5703 | 2677 | size_t MetaspaceAux::free_chunks_total_words(Metaspace::MetadataType mdtype) { |
stefank@5771 | 2678 | ChunkManager* chunk_manager = Metaspace::get_chunk_manager(mdtype); |
stefank@5771 | 2679 | if (chunk_manager == NULL) { |
hseigel@5528 | 2680 | return 0; |
hseigel@5528 | 2681 | } |
stefank@5771 | 2682 | chunk_manager->slow_verify(); |
stefank@5771 | 2683 | return chunk_manager->free_chunks_total_words(); |
coleenp@4037 | 2684 | } |
coleenp@4037 | 2685 | |
ehelin@5703 | 2686 | size_t MetaspaceAux::free_chunks_total_bytes(Metaspace::MetadataType mdtype) { |
ehelin@5703 | 2687 | return free_chunks_total_words(mdtype) * BytesPerWord; |
coleenp@4037 | 2688 | } |
coleenp@4037 | 2689 | |
ehelin@5703 | 2690 | size_t MetaspaceAux::free_chunks_total_words() { |
ehelin@5703 | 2691 | return free_chunks_total_words(Metaspace::ClassType) + |
ehelin@5703 | 2692 | free_chunks_total_words(Metaspace::NonClassType); |
jmasa@5015 | 2693 | } |
jmasa@5015 | 2694 | |
ehelin@5703 | 2695 | size_t MetaspaceAux::free_chunks_total_bytes() { |
ehelin@5703 | 2696 | return free_chunks_total_words() * BytesPerWord; |
jmasa@5015 | 2697 | } |
jmasa@5015 | 2698 | |
ehelin@6420 | 2699 | bool MetaspaceAux::has_chunk_free_list(Metaspace::MetadataType mdtype) { |
ehelin@6420 | 2700 | return Metaspace::get_chunk_manager(mdtype) != NULL; |
ehelin@6420 | 2701 | } |
ehelin@6420 | 2702 | |
ehelin@6420 | 2703 | MetaspaceChunkFreeListSummary MetaspaceAux::chunk_free_list_summary(Metaspace::MetadataType mdtype) { |
ehelin@6420 | 2704 | if (!has_chunk_free_list(mdtype)) { |
ehelin@6420 | 2705 | return MetaspaceChunkFreeListSummary(); |
ehelin@6420 | 2706 | } |
ehelin@6420 | 2707 | |
ehelin@6420 | 2708 | const ChunkManager* cm = Metaspace::get_chunk_manager(mdtype); |
ehelin@6420 | 2709 | return cm->chunk_free_list_summary(); |
ehelin@6420 | 2710 | } |
ehelin@6420 | 2711 | |
coleenp@4037 | 2712 | void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
coleenp@4037 | 2713 | gclog_or_tty->print(", [Metaspace:"); |
coleenp@4037 | 2714 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 2715 | gclog_or_tty->print(" " SIZE_FORMAT |
coleenp@4037 | 2716 | "->" SIZE_FORMAT |
jmasa@5015 | 2717 | "(" SIZE_FORMAT ")", |
coleenp@4037 | 2718 | prev_metadata_used, |
ehelin@6609 | 2719 | used_bytes(), |
ehelin@5703 | 2720 | reserved_bytes()); |
coleenp@4037 | 2721 | } else { |
coleenp@4037 | 2722 | gclog_or_tty->print(" " SIZE_FORMAT "K" |
coleenp@4037 | 2723 | "->" SIZE_FORMAT "K" |
jmasa@5015 | 2724 | "(" SIZE_FORMAT "K)", |
ehelin@5703 | 2725 | prev_metadata_used/K, |
ehelin@6609 | 2726 | used_bytes()/K, |
ehelin@5703 | 2727 | reserved_bytes()/K); |
coleenp@4037 | 2728 | } |
coleenp@4037 | 2729 | |
coleenp@4037 | 2730 | gclog_or_tty->print("]"); |
coleenp@4037 | 2731 | } |
coleenp@4037 | 2732 | |
coleenp@4037 | 2733 | // This is printed when PrintGCDetails |
coleenp@4037 | 2734 | void MetaspaceAux::print_on(outputStream* out) { |
coleenp@4037 | 2735 | Metaspace::MetadataType nct = Metaspace::NonClassType; |
coleenp@4037 | 2736 | |
stefank@5863 | 2737 | out->print_cr(" Metaspace " |
stefank@5863 | 2738 | "used " SIZE_FORMAT "K, " |
stefank@5863 | 2739 | "capacity " SIZE_FORMAT "K, " |
stefank@5863 | 2740 | "committed " SIZE_FORMAT "K, " |
stefank@5863 | 2741 | "reserved " SIZE_FORMAT "K", |
ehelin@6609 | 2742 | used_bytes()/K, |
ehelin@6609 | 2743 | capacity_bytes()/K, |
stefank@5863 | 2744 | committed_bytes()/K, |
stefank@5863 | 2745 | reserved_bytes()/K); |
stefank@5863 | 2746 | |
hseigel@5528 | 2747 | if (Metaspace::using_class_space()) { |
hseigel@5528 | 2748 | Metaspace::MetadataType ct = Metaspace::ClassType; |
hseigel@5528 | 2749 | out->print_cr(" class space " |
stefank@5863 | 2750 | "used " SIZE_FORMAT "K, " |
stefank@5863 | 2751 | "capacity " SIZE_FORMAT "K, " |
stefank@5863 | 2752 | "committed " SIZE_FORMAT "K, " |
stefank@5863 | 2753 | "reserved " SIZE_FORMAT "K", |
ehelin@6609 | 2754 | used_bytes(ct)/K, |
ehelin@6609 | 2755 | capacity_bytes(ct)/K, |
stefank@5863 | 2756 | committed_bytes(ct)/K, |
ehelin@5703 | 2757 | reserved_bytes(ct)/K); |
hseigel@5528 | 2758 | } |
coleenp@4037 | 2759 | } |
coleenp@4037 | 2760 | |
coleenp@4037 | 2761 | // Print information for class space and data space separately. |
coleenp@4037 | 2762 | // This is almost the same as above. |
coleenp@4037 | 2763 | void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
ehelin@5703 | 2764 | size_t free_chunks_capacity_bytes = free_chunks_total_bytes(mdtype); |
jmasa@5015 | 2765 | size_t capacity_bytes = capacity_bytes_slow(mdtype); |
jmasa@5015 | 2766 | size_t used_bytes = used_bytes_slow(mdtype); |
ehelin@5703 | 2767 | size_t free_bytes = free_bytes_slow(mdtype); |
coleenp@4037 | 2768 | size_t used_and_free = used_bytes + free_bytes + |
coleenp@4037 | 2769 | free_chunks_capacity_bytes; |
coleenp@4037 | 2770 | out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
coleenp@4037 | 2771 | "K + unused in chunks " SIZE_FORMAT "K + " |
coleenp@4037 | 2772 | " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
coleenp@4037 | 2773 | "K capacity in allocated chunks " SIZE_FORMAT "K", |
coleenp@4037 | 2774 | used_bytes / K, |
coleenp@4037 | 2775 | free_bytes / K, |
coleenp@4037 | 2776 | free_chunks_capacity_bytes / K, |
coleenp@4037 | 2777 | used_and_free / K, |
coleenp@4037 | 2778 | capacity_bytes / K); |
mgerdin@4738 | 2779 | // Accounting can only be correct if we got the values during a safepoint |
mgerdin@4738 | 2780 | assert(!SafepointSynchronize::is_at_safepoint() || used_and_free == capacity_bytes, "Accounting is wrong"); |
coleenp@4037 | 2781 | } |
coleenp@4037 | 2782 | |
hseigel@5528 | 2783 | // Print total fragmentation for class metaspaces |
hseigel@5528 | 2784 | void MetaspaceAux::print_class_waste(outputStream* out) { |
hseigel@5528 | 2785 | assert(Metaspace::using_class_space(), "class metaspace not used"); |
hseigel@5528 | 2786 | size_t cls_specialized_waste = 0, cls_small_waste = 0, cls_medium_waste = 0; |
hseigel@5528 | 2787 | size_t cls_specialized_count = 0, cls_small_count = 0, cls_medium_count = 0, cls_humongous_count = 0; |
hseigel@5528 | 2788 | ClassLoaderDataGraphMetaspaceIterator iter; |
hseigel@5528 | 2789 | while (iter.repeat()) { |
hseigel@5528 | 2790 | Metaspace* msp = iter.get_next(); |
hseigel@5528 | 2791 | if (msp != NULL) { |
hseigel@5528 | 2792 | cls_specialized_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
hseigel@5528 | 2793 | cls_specialized_count += msp->class_vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
hseigel@5528 | 2794 | cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
hseigel@5528 | 2795 | cls_small_count += msp->class_vsm()->sum_count_in_chunks_in_use(SmallIndex); |
hseigel@5528 | 2796 | cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
hseigel@5528 | 2797 | cls_medium_count += msp->class_vsm()->sum_count_in_chunks_in_use(MediumIndex); |
hseigel@5528 | 2798 | cls_humongous_count += msp->class_vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
hseigel@5528 | 2799 | } |
hseigel@5528 | 2800 | } |
hseigel@5528 | 2801 | out->print_cr(" class: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2802 | SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2803 | SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
hseigel@5528 | 2804 | "large count " SIZE_FORMAT, |
hseigel@5528 | 2805 | cls_specialized_count, cls_specialized_waste, |
hseigel@5528 | 2806 | cls_small_count, cls_small_waste, |
hseigel@5528 | 2807 | cls_medium_count, cls_medium_waste, cls_humongous_count); |
hseigel@5528 | 2808 | } |
hseigel@5528 | 2809 | |
hseigel@5528 | 2810 | // Print total fragmentation for data and class metaspaces separately |
coleenp@4037 | 2811 | void MetaspaceAux::print_waste(outputStream* out) { |
coleenp@5337 | 2812 | size_t specialized_waste = 0, small_waste = 0, medium_waste = 0; |
coleenp@5337 | 2813 | size_t specialized_count = 0, small_count = 0, medium_count = 0, humongous_count = 0; |
coleenp@4037 | 2814 | |
coleenp@4037 | 2815 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2816 | while (iter.repeat()) { |
coleenp@4037 | 2817 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2818 | if (msp != NULL) { |
jmasa@4382 | 2819 | specialized_waste += msp->vsm()->sum_waste_in_chunks_in_use(SpecializedIndex); |
jmasa@4382 | 2820 | specialized_count += msp->vsm()->sum_count_in_chunks_in_use(SpecializedIndex); |
coleenp@4037 | 2821 | small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
jmasa@4382 | 2822 | small_count += msp->vsm()->sum_count_in_chunks_in_use(SmallIndex); |
coleenp@4037 | 2823 | medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
jmasa@4382 | 2824 | medium_count += msp->vsm()->sum_count_in_chunks_in_use(MediumIndex); |
coleenp@5337 | 2825 | humongous_count += msp->vsm()->sum_count_in_chunks_in_use(HumongousIndex); |
coleenp@4037 | 2826 | } |
coleenp@4037 | 2827 | } |
coleenp@4037 | 2828 | out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
jmasa@4382 | 2829 | out->print_cr(" data: " SIZE_FORMAT " specialized(s) " SIZE_FORMAT ", " |
jmasa@4382 | 2830 | SIZE_FORMAT " small(s) " SIZE_FORMAT ", " |
coleenp@5337 | 2831 | SIZE_FORMAT " medium(s) " SIZE_FORMAT ", " |
coleenp@5337 | 2832 | "large count " SIZE_FORMAT, |
jmasa@4382 | 2833 | specialized_count, specialized_waste, small_count, |
coleenp@5337 | 2834 | small_waste, medium_count, medium_waste, humongous_count); |
hseigel@5528 | 2835 | if (Metaspace::using_class_space()) { |
hseigel@5528 | 2836 | print_class_waste(out); |
hseigel@5528 | 2837 | } |
coleenp@4037 | 2838 | } |
coleenp@4037 | 2839 | |
coleenp@4037 | 2840 | // Dump global metaspace things from the end of ClassLoaderDataGraph |
coleenp@4037 | 2841 | void MetaspaceAux::dump(outputStream* out) { |
coleenp@4037 | 2842 | out->print_cr("All Metaspace:"); |
coleenp@4037 | 2843 | out->print("data space: "); print_on(out, Metaspace::NonClassType); |
coleenp@4037 | 2844 | out->print("class space: "); print_on(out, Metaspace::ClassType); |
coleenp@4037 | 2845 | print_waste(out); |
coleenp@4037 | 2846 | } |
coleenp@4037 | 2847 | |
mgerdin@4264 | 2848 | void MetaspaceAux::verify_free_chunks() { |
stefank@5771 | 2849 | Metaspace::chunk_manager_metadata()->verify(); |
hseigel@5528 | 2850 | if (Metaspace::using_class_space()) { |
stefank@5771 | 2851 | Metaspace::chunk_manager_class()->verify(); |
hseigel@5528 | 2852 | } |
mgerdin@4264 | 2853 | } |
mgerdin@4264 | 2854 | |
jmasa@5015 | 2855 | void MetaspaceAux::verify_capacity() { |
jmasa@5015 | 2856 | #ifdef ASSERT |
ehelin@6609 | 2857 | size_t running_sum_capacity_bytes = capacity_bytes(); |
jmasa@5162 | 2858 | // For purposes of the running sum of capacity, verify against capacity |
jmasa@5015 | 2859 | size_t capacity_in_use_bytes = capacity_bytes_slow(); |
jmasa@5015 | 2860 | assert(running_sum_capacity_bytes == capacity_in_use_bytes, |
ehelin@6609 | 2861 | err_msg("capacity_words() * BytesPerWord " SIZE_FORMAT |
jmasa@5015 | 2862 | " capacity_bytes_slow()" SIZE_FORMAT, |
jmasa@5015 | 2863 | running_sum_capacity_bytes, capacity_in_use_bytes)); |
jmasa@5162 | 2864 | for (Metaspace::MetadataType i = Metaspace::ClassType; |
jmasa@5162 | 2865 | i < Metaspace:: MetadataTypeCount; |
jmasa@5162 | 2866 | i = (Metaspace::MetadataType)(i + 1)) { |
jmasa@5162 | 2867 | size_t capacity_in_use_bytes = capacity_bytes_slow(i); |
ehelin@6609 | 2868 | assert(capacity_bytes(i) == capacity_in_use_bytes, |
ehelin@6609 | 2869 | err_msg("capacity_bytes(%u) " SIZE_FORMAT |
jmasa@5162 | 2870 | " capacity_bytes_slow(%u)" SIZE_FORMAT, |
ehelin@6609 | 2871 | i, capacity_bytes(i), i, capacity_in_use_bytes)); |
jmasa@5162 | 2872 | } |
jmasa@5015 | 2873 | #endif |
jmasa@5015 | 2874 | } |
jmasa@5015 | 2875 | |
jmasa@5015 | 2876 | void MetaspaceAux::verify_used() { |
jmasa@5015 | 2877 | #ifdef ASSERT |
ehelin@6609 | 2878 | size_t running_sum_used_bytes = used_bytes(); |
jmasa@5162 | 2879 | // For purposes of the running sum of used, verify against used |
jmasa@5015 | 2880 | size_t used_in_use_bytes = used_bytes_slow(); |
ehelin@6609 | 2881 | assert(used_bytes() == used_in_use_bytes, |
ehelin@6609 | 2882 | err_msg("used_bytes() " SIZE_FORMAT |
jmasa@5162 | 2883 | " used_bytes_slow()" SIZE_FORMAT, |
ehelin@6609 | 2884 | used_bytes(), used_in_use_bytes)); |
jmasa@5162 | 2885 | for (Metaspace::MetadataType i = Metaspace::ClassType; |
jmasa@5162 | 2886 | i < Metaspace:: MetadataTypeCount; |
jmasa@5162 | 2887 | i = (Metaspace::MetadataType)(i + 1)) { |
jmasa@5162 | 2888 | size_t used_in_use_bytes = used_bytes_slow(i); |
ehelin@6609 | 2889 | assert(used_bytes(i) == used_in_use_bytes, |
ehelin@6609 | 2890 | err_msg("used_bytes(%u) " SIZE_FORMAT |
jmasa@5162 | 2891 | " used_bytes_slow(%u)" SIZE_FORMAT, |
ehelin@6609 | 2892 | i, used_bytes(i), i, used_in_use_bytes)); |
jmasa@5162 | 2893 | } |
jmasa@5015 | 2894 | #endif |
jmasa@5015 | 2895 | } |
jmasa@5015 | 2896 | |
jmasa@5015 | 2897 | void MetaspaceAux::verify_metrics() { |
jmasa@5015 | 2898 | verify_capacity(); |
jmasa@5015 | 2899 | verify_used(); |
jmasa@5015 | 2900 | } |
jmasa@5015 | 2901 | |
jmasa@5015 | 2902 | |
coleenp@4037 | 2903 | // Metaspace methods |
coleenp@4037 | 2904 | |
coleenp@4037 | 2905 | size_t Metaspace::_first_chunk_word_size = 0; |
jmasa@4382 | 2906 | size_t Metaspace::_first_class_chunk_word_size = 0; |
jmasa@4382 | 2907 | |
stefank@5863 | 2908 | size_t Metaspace::_commit_alignment = 0; |
stefank@5863 | 2909 | size_t Metaspace::_reserve_alignment = 0; |
stefank@5863 | 2910 | |
jmasa@4382 | 2911 | Metaspace::Metaspace(Mutex* lock, MetaspaceType type) { |
jmasa@4382 | 2912 | initialize(lock, type); |
coleenp@4037 | 2913 | } |
coleenp@4037 | 2914 | |
coleenp@4037 | 2915 | Metaspace::~Metaspace() { |
coleenp@4037 | 2916 | delete _vsm; |
hseigel@5528 | 2917 | if (using_class_space()) { |
hseigel@5528 | 2918 | delete _class_vsm; |
hseigel@5528 | 2919 | } |
coleenp@4037 | 2920 | } |
coleenp@4037 | 2921 | |
coleenp@4037 | 2922 | VirtualSpaceList* Metaspace::_space_list = NULL; |
coleenp@4037 | 2923 | VirtualSpaceList* Metaspace::_class_space_list = NULL; |
coleenp@4037 | 2924 | |
stefank@5771 | 2925 | ChunkManager* Metaspace::_chunk_manager_metadata = NULL; |
stefank@5771 | 2926 | ChunkManager* Metaspace::_chunk_manager_class = NULL; |
stefank@5771 | 2927 | |
coleenp@4037 | 2928 | #define VIRTUALSPACEMULTIPLIER 2 |
coleenp@4037 | 2929 | |
hseigel@5528 | 2930 | #ifdef _LP64 |
coleenp@6029 | 2931 | static const uint64_t UnscaledClassSpaceMax = (uint64_t(max_juint) + 1); |
coleenp@6029 | 2932 | |
hseigel@5528 | 2933 | void Metaspace::set_narrow_klass_base_and_shift(address metaspace_base, address cds_base) { |
hseigel@5528 | 2934 | // Figure out the narrow_klass_base and the narrow_klass_shift. The |
hseigel@5528 | 2935 | // narrow_klass_base is the lower of the metaspace base and the cds base |
hseigel@5528 | 2936 | // (if cds is enabled). The narrow_klass_shift depends on the distance |
hseigel@5528 | 2937 | // between the lower base and higher address. |
hseigel@5528 | 2938 | address lower_base; |
hseigel@5528 | 2939 | address higher_address; |
hseigel@5528 | 2940 | if (UseSharedSpaces) { |
hseigel@5528 | 2941 | higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
coleenp@6029 | 2942 | (address)(metaspace_base + compressed_class_space_size())); |
hseigel@5528 | 2943 | lower_base = MIN2(metaspace_base, cds_base); |
hseigel@5528 | 2944 | } else { |
coleenp@6029 | 2945 | higher_address = metaspace_base + compressed_class_space_size(); |
hseigel@5528 | 2946 | lower_base = metaspace_base; |
coleenp@6029 | 2947 | |
coleenp@6029 | 2948 | uint64_t klass_encoding_max = UnscaledClassSpaceMax << LogKlassAlignmentInBytes; |
coleenp@6029 | 2949 | // If compressed class space fits in lower 32G, we don't need a base. |
coleenp@6029 | 2950 | if (higher_address <= (address)klass_encoding_max) { |
coleenp@6029 | 2951 | lower_base = 0; // effectively lower base is zero. |
coleenp@6029 | 2952 | } |
hseigel@5528 | 2953 | } |
coleenp@6029 | 2954 | |
hseigel@5528 | 2955 | Universe::set_narrow_klass_base(lower_base); |
coleenp@6029 | 2956 | |
coleenp@6062 | 2957 | if ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax) { |
hseigel@5528 | 2958 | Universe::set_narrow_klass_shift(0); |
hseigel@5528 | 2959 | } else { |
hseigel@5528 | 2960 | assert(!UseSharedSpaces, "Cannot shift with UseSharedSpaces"); |
hseigel@5528 | 2961 | Universe::set_narrow_klass_shift(LogKlassAlignmentInBytes); |
hseigel@5528 | 2962 | } |
hseigel@5528 | 2963 | } |
hseigel@5528 | 2964 | |
hseigel@5528 | 2965 | // Return TRUE if the specified metaspace_base and cds_base are close enough |
hseigel@5528 | 2966 | // to work with compressed klass pointers. |
hseigel@5528 | 2967 | bool Metaspace::can_use_cds_with_metaspace_addr(char* metaspace_base, address cds_base) { |
hseigel@5528 | 2968 | assert(cds_base != 0 && UseSharedSpaces, "Only use with CDS"); |
ehelin@5694 | 2969 | assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
hseigel@5528 | 2970 | address lower_base = MIN2((address)metaspace_base, cds_base); |
hseigel@5528 | 2971 | address higher_address = MAX2((address)(cds_base + FileMapInfo::shared_spaces_size()), |
coleenp@6029 | 2972 | (address)(metaspace_base + compressed_class_space_size())); |
coleenp@6062 | 2973 | return ((uint64_t)(higher_address - lower_base) <= UnscaledClassSpaceMax); |
hseigel@5528 | 2974 | } |
hseigel@5528 | 2975 | |
hseigel@5528 | 2976 | // Try to allocate the metaspace at the requested addr. |
hseigel@5528 | 2977 | void Metaspace::allocate_metaspace_compressed_klass_ptrs(char* requested_addr, address cds_base) { |
hseigel@5528 | 2978 | assert(using_class_space(), "called improperly"); |
ehelin@5694 | 2979 | assert(UseCompressedClassPointers, "Only use with CompressedKlassPtrs"); |
coleenp@6029 | 2980 | assert(compressed_class_space_size() < KlassEncodingMetaspaceMax, |
hseigel@5528 | 2981 | "Metaspace size is too big"); |
coleenp@6029 | 2982 | assert_is_ptr_aligned(requested_addr, _reserve_alignment); |
coleenp@6029 | 2983 | assert_is_ptr_aligned(cds_base, _reserve_alignment); |
coleenp@6029 | 2984 | assert_is_size_aligned(compressed_class_space_size(), _reserve_alignment); |
stefank@5863 | 2985 | |
stefank@5863 | 2986 | // Don't use large pages for the class space. |
stefank@5863 | 2987 | bool large_pages = false; |
hseigel@5528 | 2988 | |
coleenp@6029 | 2989 | ReservedSpace metaspace_rs = ReservedSpace(compressed_class_space_size(), |
stefank@5863 | 2990 | _reserve_alignment, |
stefank@5863 | 2991 | large_pages, |
stefank@5863 | 2992 | requested_addr, 0); |
hseigel@5528 | 2993 | if (!metaspace_rs.is_reserved()) { |
hseigel@5528 | 2994 | if (UseSharedSpaces) { |
stefank@5863 | 2995 | size_t increment = align_size_up(1*G, _reserve_alignment); |
stefank@5863 | 2996 | |
hseigel@5528 | 2997 | // Keep trying to allocate the metaspace, increasing the requested_addr |
hseigel@5528 | 2998 | // by 1GB each time, until we reach an address that will no longer allow |
hseigel@5528 | 2999 | // use of CDS with compressed klass pointers. |
hseigel@5528 | 3000 | char *addr = requested_addr; |
stefank@5863 | 3001 | while (!metaspace_rs.is_reserved() && (addr + increment > addr) && |
stefank@5863 | 3002 | can_use_cds_with_metaspace_addr(addr + increment, cds_base)) { |
stefank@5863 | 3003 | addr = addr + increment; |
coleenp@6029 | 3004 | metaspace_rs = ReservedSpace(compressed_class_space_size(), |
stefank@5863 | 3005 | _reserve_alignment, large_pages, addr, 0); |
hseigel@5528 | 3006 | } |
hseigel@5528 | 3007 | } |
hseigel@5528 | 3008 | |
hseigel@5528 | 3009 | // If no successful allocation then try to allocate the space anywhere. If |
hseigel@5528 | 3010 | // that fails then OOM doom. At this point we cannot try allocating the |
ehelin@5694 | 3011 | // metaspace as if UseCompressedClassPointers is off because too much |
ehelin@5694 | 3012 | // initialization has happened that depends on UseCompressedClassPointers. |
ehelin@5694 | 3013 | // So, UseCompressedClassPointers cannot be turned off at this point. |
hseigel@5528 | 3014 | if (!metaspace_rs.is_reserved()) { |
coleenp@6029 | 3015 | metaspace_rs = ReservedSpace(compressed_class_space_size(), |
stefank@5863 | 3016 | _reserve_alignment, large_pages); |
hseigel@5528 | 3017 | if (!metaspace_rs.is_reserved()) { |
hseigel@5528 | 3018 | vm_exit_during_initialization(err_msg("Could not allocate metaspace: %d bytes", |
coleenp@6029 | 3019 | compressed_class_space_size())); |
hseigel@5528 | 3020 | } |
hseigel@5528 | 3021 | } |
hseigel@5528 | 3022 | } |
hseigel@5528 | 3023 | |
hseigel@5528 | 3024 | // If we got here then the metaspace got allocated. |
hseigel@5528 | 3025 | MemTracker::record_virtual_memory_type((address)metaspace_rs.base(), mtClass); |
hseigel@5528 | 3026 | |
hseigel@5528 | 3027 | // Verify that we can use shared spaces. Otherwise, turn off CDS. |
hseigel@5528 | 3028 | if (UseSharedSpaces && !can_use_cds_with_metaspace_addr(metaspace_rs.base(), cds_base)) { |
hseigel@5528 | 3029 | FileMapInfo::stop_sharing_and_unmap( |
hseigel@5528 | 3030 | "Could not allocate metaspace at a compatible address"); |
hseigel@5528 | 3031 | } |
hseigel@5528 | 3032 | |
hseigel@5528 | 3033 | set_narrow_klass_base_and_shift((address)metaspace_rs.base(), |
hseigel@5528 | 3034 | UseSharedSpaces ? (address)cds_base : 0); |
hseigel@5528 | 3035 | |
hseigel@5528 | 3036 | initialize_class_space(metaspace_rs); |
hseigel@5528 | 3037 | |
hseigel@5528 | 3038 | if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) { |
hseigel@5528 | 3039 | gclog_or_tty->print_cr("Narrow klass base: " PTR_FORMAT ", Narrow klass shift: " SIZE_FORMAT, |
hseigel@5528 | 3040 | Universe::narrow_klass_base(), Universe::narrow_klass_shift()); |
coleenp@6029 | 3041 | gclog_or_tty->print_cr("Compressed class space size: " SIZE_FORMAT " Address: " PTR_FORMAT " Req Addr: " PTR_FORMAT, |
coleenp@6029 | 3042 | compressed_class_space_size(), metaspace_rs.base(), requested_addr); |
hseigel@5528 | 3043 | } |
hseigel@5528 | 3044 | } |
hseigel@5528 | 3045 | |
ehelin@5694 | 3046 | // For UseCompressedClassPointers the class space is reserved above the top of |
hseigel@5528 | 3047 | // the Java heap. The argument passed in is at the base of the compressed space. |
hseigel@5528 | 3048 | void Metaspace::initialize_class_space(ReservedSpace rs) { |
hseigel@5528 | 3049 | // The reserved space size may be bigger because of alignment, esp with UseLargePages |
ehelin@5694 | 3050 | assert(rs.size() >= CompressedClassSpaceSize, |
ehelin@5694 | 3051 | err_msg(SIZE_FORMAT " != " UINTX_FORMAT, rs.size(), CompressedClassSpaceSize)); |
hseigel@5528 | 3052 | assert(using_class_space(), "Must be using class space"); |
hseigel@5528 | 3053 | _class_space_list = new VirtualSpaceList(rs); |
stefank@5771 | 3054 | _chunk_manager_class = new ChunkManager(SpecializedChunk, ClassSmallChunk, ClassMediumChunk); |
stefank@5863 | 3055 | |
stefank@5863 | 3056 | if (!_class_space_list->initialization_succeeded()) { |
stefank@5863 | 3057 | vm_exit_during_initialization("Failed to setup compressed class space virtual space list."); |
stefank@5863 | 3058 | } |
hseigel@5528 | 3059 | } |
hseigel@5528 | 3060 | |
hseigel@5528 | 3061 | #endif |
hseigel@5528 | 3062 | |
stefank@5863 | 3063 | void Metaspace::ergo_initialize() { |
stefank@5863 | 3064 | if (DumpSharedSpaces) { |
stefank@5863 | 3065 | // Using large pages when dumping the shared archive is currently not implemented. |
stefank@5863 | 3066 | FLAG_SET_ERGO(bool, UseLargePagesInMetaspace, false); |
stefank@5863 | 3067 | } |
stefank@5863 | 3068 | |
stefank@5863 | 3069 | size_t page_size = os::vm_page_size(); |
stefank@5863 | 3070 | if (UseLargePages && UseLargePagesInMetaspace) { |
stefank@5863 | 3071 | page_size = os::large_page_size(); |
stefank@5863 | 3072 | } |
stefank@5863 | 3073 | |
stefank@5863 | 3074 | _commit_alignment = page_size; |
stefank@5863 | 3075 | _reserve_alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity()); |
stefank@5863 | 3076 | |
stefank@5863 | 3077 | // Do not use FLAG_SET_ERGO to update MaxMetaspaceSize, since this will |
stefank@5863 | 3078 | // override if MaxMetaspaceSize was set on the command line or not. |
stefank@5863 | 3079 | // This information is needed later to conform to the specification of the |
stefank@5863 | 3080 | // java.lang.management.MemoryUsage API. |
stefank@5863 | 3081 | // |
stefank@5863 | 3082 | // Ideally, we would be able to set the default value of MaxMetaspaceSize in |
stefank@5863 | 3083 | // globals.hpp to the aligned value, but this is not possible, since the |
stefank@5863 | 3084 | // alignment depends on other flags being parsed. |
jwilhelm@6083 | 3085 | MaxMetaspaceSize = align_size_down_bounded(MaxMetaspaceSize, _reserve_alignment); |
stefank@5863 | 3086 | |
stefank@5863 | 3087 | if (MetaspaceSize > MaxMetaspaceSize) { |
stefank@5863 | 3088 | MetaspaceSize = MaxMetaspaceSize; |
stefank@5863 | 3089 | } |
stefank@5863 | 3090 | |
jwilhelm@6083 | 3091 | MetaspaceSize = align_size_down_bounded(MetaspaceSize, _commit_alignment); |
stefank@5863 | 3092 | |
stefank@5863 | 3093 | assert(MetaspaceSize <= MaxMetaspaceSize, "MetaspaceSize should be limited by MaxMetaspaceSize"); |
stefank@5863 | 3094 | |
stefank@5863 | 3095 | if (MetaspaceSize < 256*K) { |
stefank@5863 | 3096 | vm_exit_during_initialization("Too small initial Metaspace size"); |
stefank@5863 | 3097 | } |
stefank@5863 | 3098 | |
jwilhelm@6083 | 3099 | MinMetaspaceExpansion = align_size_down_bounded(MinMetaspaceExpansion, _commit_alignment); |
jwilhelm@6083 | 3100 | MaxMetaspaceExpansion = align_size_down_bounded(MaxMetaspaceExpansion, _commit_alignment); |
jwilhelm@6083 | 3101 | |
jwilhelm@6083 | 3102 | CompressedClassSpaceSize = align_size_down_bounded(CompressedClassSpaceSize, _reserve_alignment); |
coleenp@6029 | 3103 | set_compressed_class_space_size(CompressedClassSpaceSize); |
stefank@5863 | 3104 | } |
stefank@5863 | 3105 | |
coleenp@4037 | 3106 | void Metaspace::global_initialize() { |
ehelin@6722 | 3107 | MetaspaceGC::initialize(); |
ehelin@6722 | 3108 | |
coleenp@4037 | 3109 | // Initialize the alignment for shared spaces. |
coleenp@4037 | 3110 | int max_alignment = os::vm_page_size(); |
hseigel@5528 | 3111 | size_t cds_total = 0; |
hseigel@5528 | 3112 | |
coleenp@4037 | 3113 | MetaspaceShared::set_max_alignment(max_alignment); |
coleenp@4037 | 3114 | |
coleenp@4037 | 3115 | if (DumpSharedSpaces) { |
stefank@5863 | 3116 | SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
coleenp@4037 | 3117 | SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
stefank@5863 | 3118 | SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
stefank@5863 | 3119 | SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
coleenp@4037 | 3120 | |
coleenp@4037 | 3121 | // Initialize with the sum of the shared space sizes. The read-only |
coleenp@4037 | 3122 | // and read write metaspace chunks will be allocated out of this and the |
coleenp@4037 | 3123 | // remainder is the misc code and data chunks. |
hseigel@5528 | 3124 | cds_total = FileMapInfo::shared_spaces_size(); |
stefank@5863 | 3125 | cds_total = align_size_up(cds_total, _reserve_alignment); |
hseigel@5528 | 3126 | _space_list = new VirtualSpaceList(cds_total/wordSize); |
stefank@5771 | 3127 | _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
hseigel@5528 | 3128 | |
stefank@5863 | 3129 | if (!_space_list->initialization_succeeded()) { |
stefank@5863 | 3130 | vm_exit_during_initialization("Unable to dump shared archive.", NULL); |
stefank@5863 | 3131 | } |
stefank@5863 | 3132 | |
hseigel@5528 | 3133 | #ifdef _LP64 |
coleenp@6029 | 3134 | if (cds_total + compressed_class_space_size() > UnscaledClassSpaceMax) { |
stefank@5863 | 3135 | vm_exit_during_initialization("Unable to dump shared archive.", |
stefank@5863 | 3136 | err_msg("Size of archive (" SIZE_FORMAT ") + compressed class space (" |
stefank@5863 | 3137 | SIZE_FORMAT ") == total (" SIZE_FORMAT ") is larger than compressed " |
coleenp@6029 | 3138 | "klass limit: " SIZE_FORMAT, cds_total, compressed_class_space_size(), |
coleenp@6029 | 3139 | cds_total + compressed_class_space_size(), UnscaledClassSpaceMax)); |
stefank@5863 | 3140 | } |
stefank@5863 | 3141 | |
hseigel@5528 | 3142 | // Set the compressed klass pointer base so that decoding of these pointers works |
hseigel@5528 | 3143 | // properly when creating the shared archive. |
ehelin@5694 | 3144 | assert(UseCompressedOops && UseCompressedClassPointers, |
ehelin@5694 | 3145 | "UseCompressedOops and UseCompressedClassPointers must be set"); |
hseigel@5528 | 3146 | Universe::set_narrow_klass_base((address)_space_list->current_virtual_space()->bottom()); |
hseigel@5528 | 3147 | if (TraceMetavirtualspaceAllocation && Verbose) { |
hseigel@5528 | 3148 | gclog_or_tty->print_cr("Setting_narrow_klass_base to Address: " PTR_FORMAT, |
hseigel@5528 | 3149 | _space_list->current_virtual_space()->bottom()); |
hseigel@5528 | 3150 | } |
hseigel@5528 | 3151 | |
hseigel@5528 | 3152 | Universe::set_narrow_klass_shift(0); |
hseigel@5528 | 3153 | #endif |
hseigel@5528 | 3154 | |
coleenp@4037 | 3155 | } else { |
coleenp@4037 | 3156 | // If using shared space, open the file that contains the shared space |
coleenp@4037 | 3157 | // and map in the memory before initializing the rest of metaspace (so |
coleenp@4037 | 3158 | // the addresses don't conflict) |
hseigel@5528 | 3159 | address cds_address = NULL; |
coleenp@4037 | 3160 | if (UseSharedSpaces) { |
coleenp@4037 | 3161 | FileMapInfo* mapinfo = new FileMapInfo(); |
coleenp@4037 | 3162 | memset(mapinfo, 0, sizeof(FileMapInfo)); |
coleenp@4037 | 3163 | |
coleenp@4037 | 3164 | // Open the shared archive file, read and validate the header. If |
coleenp@4037 | 3165 | // initialization fails, shared spaces [UseSharedSpaces] are |
coleenp@4037 | 3166 | // disabled and the file is closed. |
coleenp@4037 | 3167 | // Map in spaces now also |
coleenp@4037 | 3168 | if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
coleenp@4037 | 3169 | FileMapInfo::set_current_info(mapinfo); |
stefank@5863 | 3170 | cds_total = FileMapInfo::shared_spaces_size(); |
stefank@5863 | 3171 | cds_address = (address)mapinfo->region_base(0); |
coleenp@4037 | 3172 | } else { |
coleenp@4037 | 3173 | assert(!mapinfo->is_open() && !UseSharedSpaces, |
coleenp@4037 | 3174 | "archive file not closed or shared spaces not disabled."); |
coleenp@4037 | 3175 | } |
coleenp@4037 | 3176 | } |
coleenp@4037 | 3177 | |
hseigel@5528 | 3178 | #ifdef _LP64 |
ehelin@5694 | 3179 | // If UseCompressedClassPointers is set then allocate the metaspace area |
hseigel@5528 | 3180 | // above the heap and above the CDS area (if it exists). |
hseigel@5528 | 3181 | if (using_class_space()) { |
hseigel@5528 | 3182 | if (UseSharedSpaces) { |
stefank@5863 | 3183 | char* cds_end = (char*)(cds_address + cds_total); |
stefank@5863 | 3184 | cds_end = (char *)align_ptr_up(cds_end, _reserve_alignment); |
stefank@5863 | 3185 | allocate_metaspace_compressed_klass_ptrs(cds_end, cds_address); |
hseigel@5528 | 3186 | } else { |
coleenp@6029 | 3187 | char* base = (char*)align_ptr_up(Universe::heap()->reserved_region().end(), _reserve_alignment); |
coleenp@6029 | 3188 | allocate_metaspace_compressed_klass_ptrs(base, 0); |
hseigel@5528 | 3189 | } |
hseigel@5528 | 3190 | } |
hseigel@5528 | 3191 | #endif |
hseigel@5528 | 3192 | |
jmasa@4382 | 3193 | // Initialize these before initializing the VirtualSpaceList |
coleenp@4037 | 3194 | _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
jmasa@4382 | 3195 | _first_chunk_word_size = align_word_size_up(_first_chunk_word_size); |
jmasa@4382 | 3196 | // Make the first class chunk bigger than a medium chunk so it's not put |
jmasa@4382 | 3197 | // on the medium chunk list. The next chunk will be small and progress |
jmasa@4382 | 3198 | // from there. This size calculated by -version. |
jmasa@4382 | 3199 | _first_class_chunk_word_size = MIN2((size_t)MediumChunk*6, |
ehelin@5694 | 3200 | (CompressedClassSpaceSize/BytesPerWord)*2); |
jmasa@4382 | 3201 | _first_class_chunk_word_size = align_word_size_up(_first_class_chunk_word_size); |
coleenp@4037 | 3202 | // Arbitrarily set the initial virtual space to a multiple |
coleenp@4037 | 3203 | // of the boot class loader size. |
stefank@5863 | 3204 | size_t word_size = VIRTUALSPACEMULTIPLIER * _first_chunk_word_size; |
stefank@5863 | 3205 | word_size = align_size_up(word_size, Metaspace::reserve_alignment_words()); |
stefank@5863 | 3206 | |
coleenp@4037 | 3207 | // Initialize the list of virtual spaces. |
coleenp@4037 | 3208 | _space_list = new VirtualSpaceList(word_size); |
stefank@5771 | 3209 | _chunk_manager_metadata = new ChunkManager(SpecializedChunk, SmallChunk, MediumChunk); |
stefank@5863 | 3210 | |
stefank@5863 | 3211 | if (!_space_list->initialization_succeeded()) { |
stefank@5863 | 3212 | vm_exit_during_initialization("Unable to setup metadata virtual space list.", NULL); |
stefank@5863 | 3213 | } |
coleenp@4037 | 3214 | } |
stefank@5863 | 3215 | |
ehelin@6417 | 3216 | _tracer = new MetaspaceTracer(); |
coleenp@4037 | 3217 | } |
coleenp@4037 | 3218 | |
ehelin@6722 | 3219 | void Metaspace::post_initialize() { |
ehelin@6722 | 3220 | MetaspaceGC::post_initialize(); |
ehelin@6722 | 3221 | } |
ehelin@6722 | 3222 | |
stefank@5771 | 3223 | Metachunk* Metaspace::get_initialization_chunk(MetadataType mdtype, |
stefank@5771 | 3224 | size_t chunk_word_size, |
stefank@5771 | 3225 | size_t chunk_bunch) { |
stefank@5771 | 3226 | // Get a chunk from the chunk freelist |
stefank@5771 | 3227 | Metachunk* chunk = get_chunk_manager(mdtype)->chunk_freelist_allocate(chunk_word_size); |
stefank@5771 | 3228 | if (chunk != NULL) { |
stefank@5771 | 3229 | return chunk; |
stefank@5771 | 3230 | } |
stefank@5771 | 3231 | |
stefank@5863 | 3232 | return get_space_list(mdtype)->get_new_chunk(chunk_word_size, chunk_word_size, chunk_bunch); |
stefank@5771 | 3233 | } |
stefank@5771 | 3234 | |
hseigel@5528 | 3235 | void Metaspace::initialize(Mutex* lock, MetaspaceType type) { |
coleenp@4037 | 3236 | |
coleenp@4037 | 3237 | assert(space_list() != NULL, |
coleenp@4037 | 3238 | "Metadata VirtualSpaceList has not been initialized"); |
stefank@5771 | 3239 | assert(chunk_manager_metadata() != NULL, |
stefank@5771 | 3240 | "Metadata ChunkManager has not been initialized"); |
stefank@5771 | 3241 | |
stefank@5771 | 3242 | _vsm = new SpaceManager(NonClassType, lock); |
coleenp@4037 | 3243 | if (_vsm == NULL) { |
coleenp@4037 | 3244 | return; |
coleenp@4037 | 3245 | } |
jmasa@4382 | 3246 | size_t word_size; |
jmasa@4382 | 3247 | size_t class_word_size; |
hseigel@5528 | 3248 | vsm()->get_initial_chunk_sizes(type, &word_size, &class_word_size); |
hseigel@5528 | 3249 | |
hseigel@5528 | 3250 | if (using_class_space()) { |
stefank@5771 | 3251 | assert(class_space_list() != NULL, |
stefank@5771 | 3252 | "Class VirtualSpaceList has not been initialized"); |
stefank@5771 | 3253 | assert(chunk_manager_class() != NULL, |
stefank@5771 | 3254 | "Class ChunkManager has not been initialized"); |
hseigel@5528 | 3255 | |
hseigel@5528 | 3256 | // Allocate SpaceManager for classes. |
stefank@5771 | 3257 | _class_vsm = new SpaceManager(ClassType, lock); |
hseigel@5528 | 3258 | if (_class_vsm == NULL) { |
hseigel@5528 | 3259 | return; |
hseigel@5528 | 3260 | } |
coleenp@4037 | 3261 | } |
coleenp@4037 | 3262 | |
coleenp@4037 | 3263 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 3264 | |
coleenp@4037 | 3265 | // Allocate chunk for metadata objects |
stefank@5771 | 3266 | Metachunk* new_chunk = get_initialization_chunk(NonClassType, |
stefank@5771 | 3267 | word_size, |
stefank@5771 | 3268 | vsm()->medium_chunk_bunch()); |
coleenp@4037 | 3269 | assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
coleenp@4037 | 3270 | if (new_chunk != NULL) { |
coleenp@4037 | 3271 | // Add to this manager's list of chunks in use and current_chunk(). |
coleenp@4037 | 3272 | vsm()->add_chunk(new_chunk, true); |
coleenp@4037 | 3273 | } |
coleenp@4037 | 3274 | |
coleenp@4037 | 3275 | // Allocate chunk for class metadata objects |
hseigel@5528 | 3276 | if (using_class_space()) { |
stefank@5771 | 3277 | Metachunk* class_chunk = get_initialization_chunk(ClassType, |
stefank@5771 | 3278 | class_word_size, |
stefank@5771 | 3279 | class_vsm()->medium_chunk_bunch()); |
hseigel@5528 | 3280 | if (class_chunk != NULL) { |
hseigel@5528 | 3281 | class_vsm()->add_chunk(class_chunk, true); |
hseigel@5528 | 3282 | } |
coleenp@4037 | 3283 | } |
iklam@5208 | 3284 | |
iklam@5208 | 3285 | _alloc_record_head = NULL; |
iklam@5208 | 3286 | _alloc_record_tail = NULL; |
coleenp@4037 | 3287 | } |
coleenp@4037 | 3288 | |
jmasa@4382 | 3289 | size_t Metaspace::align_word_size_up(size_t word_size) { |
jmasa@4382 | 3290 | size_t byte_size = word_size * wordSize; |
jmasa@4382 | 3291 | return ReservedSpace::allocation_align_size_up(byte_size) / wordSize; |
jmasa@4382 | 3292 | } |
jmasa@4382 | 3293 | |
coleenp@4037 | 3294 | MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
coleenp@4037 | 3295 | // DumpSharedSpaces doesn't use class metadata area (yet) |
ehelin@5694 | 3296 | // Also, don't use class_vsm() unless UseCompressedClassPointers is true. |
mgerdin@5808 | 3297 | if (is_class_space_allocation(mdtype)) { |
jmasa@4196 | 3298 | return class_vsm()->allocate(word_size); |
coleenp@4037 | 3299 | } else { |
jmasa@4196 | 3300 | return vsm()->allocate(word_size); |
coleenp@4037 | 3301 | } |
coleenp@4037 | 3302 | } |
coleenp@4037 | 3303 | |
jmasa@4064 | 3304 | MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
stefank@5863 | 3305 | size_t delta_bytes = MetaspaceGC::delta_capacity_until_GC(word_size * BytesPerWord); |
stefank@5863 | 3306 | assert(delta_bytes > 0, "Must be"); |
stefank@5863 | 3307 | |
stefank@5863 | 3308 | size_t after_inc = MetaspaceGC::inc_capacity_until_GC(delta_bytes); |
ehelin@6417 | 3309 | |
ehelin@6417 | 3310 | // capacity_until_GC might be updated concurrently, must calculate previous value. |
stefank@5863 | 3311 | size_t before_inc = after_inc - delta_bytes; |
stefank@5863 | 3312 | |
ehelin@6417 | 3313 | tracer()->report_gc_threshold(before_inc, after_inc, |
ehelin@6417 | 3314 | MetaspaceGCThresholdUpdater::ExpandAndAllocate); |
jmasa@4064 | 3315 | if (PrintGCDetails && Verbose) { |
jmasa@4064 | 3316 | gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
stefank@5863 | 3317 | " to " SIZE_FORMAT, before_inc, after_inc); |
jmasa@4064 | 3318 | } |
jmasa@4196 | 3319 | |
stefank@5863 | 3320 | return allocate(word_size, mdtype); |
jmasa@4064 | 3321 | } |
jmasa@4064 | 3322 | |
coleenp@4037 | 3323 | // Space allocated in the Metaspace. This may |
coleenp@4037 | 3324 | // be across several metadata virtual spaces. |
coleenp@4037 | 3325 | char* Metaspace::bottom() const { |
coleenp@4037 | 3326 | assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
coleenp@4037 | 3327 | return (char*)vsm()->current_chunk()->bottom(); |
coleenp@4037 | 3328 | } |
coleenp@4037 | 3329 | |
jmasa@5015 | 3330 | size_t Metaspace::used_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3331 | if (mdtype == ClassType) { |
hseigel@5528 | 3332 | return using_class_space() ? class_vsm()->sum_used_in_chunks_in_use() : 0; |
hseigel@5528 | 3333 | } else { |
hseigel@5528 | 3334 | return vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
hseigel@5528 | 3335 | } |
coleenp@4037 | 3336 | } |
coleenp@4037 | 3337 | |
ehelin@5703 | 3338 | size_t Metaspace::free_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3339 | if (mdtype == ClassType) { |
hseigel@5528 | 3340 | return using_class_space() ? class_vsm()->sum_free_in_chunks_in_use() : 0; |
hseigel@5528 | 3341 | } else { |
hseigel@5528 | 3342 | return vsm()->sum_free_in_chunks_in_use(); |
hseigel@5528 | 3343 | } |
coleenp@4037 | 3344 | } |
coleenp@4037 | 3345 | |
coleenp@4037 | 3346 | // Space capacity in the Metaspace. It includes |
coleenp@4037 | 3347 | // space in the list of chunks from which allocations |
coleenp@4037 | 3348 | // have been made. Don't include space in the global freelist and |
coleenp@4037 | 3349 | // in the space available in the dictionary which |
coleenp@4037 | 3350 | // is already counted in some chunk. |
jmasa@5015 | 3351 | size_t Metaspace::capacity_words_slow(MetadataType mdtype) const { |
hseigel@5528 | 3352 | if (mdtype == ClassType) { |
hseigel@5528 | 3353 | return using_class_space() ? class_vsm()->sum_capacity_in_chunks_in_use() : 0; |
hseigel@5528 | 3354 | } else { |
hseigel@5528 | 3355 | return vsm()->sum_capacity_in_chunks_in_use(); |
hseigel@5528 | 3356 | } |
coleenp@4037 | 3357 | } |
coleenp@4037 | 3358 | |
jmasa@5015 | 3359 | size_t Metaspace::used_bytes_slow(MetadataType mdtype) const { |
jmasa@5015 | 3360 | return used_words_slow(mdtype) * BytesPerWord; |
jmasa@5015 | 3361 | } |
jmasa@5015 | 3362 | |
jmasa@5015 | 3363 | size_t Metaspace::capacity_bytes_slow(MetadataType mdtype) const { |
jmasa@5015 | 3364 | return capacity_words_slow(mdtype) * BytesPerWord; |
jmasa@5015 | 3365 | } |
jmasa@5015 | 3366 | |
coleenp@4037 | 3367 | void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
coleenp@4037 | 3368 | if (SafepointSynchronize::is_at_safepoint()) { |
coleenp@4037 | 3369 | assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
jmasa@4196 | 3370 | // Don't take Heap_lock |
mgerdin@5023 | 3371 | MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
goetz@6337 | 3372 | if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
jmasa@4196 | 3373 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 3374 | #ifdef ASSERT |
jmasa@4196 | 3375 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 3376 | #endif |
jmasa@4196 | 3377 | return; |
jmasa@4196 | 3378 | } |
hseigel@5528 | 3379 | if (is_class && using_class_space()) { |
hseigel@5528 | 3380 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3381 | } else { |
jmasa@4196 | 3382 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3383 | } |
coleenp@4037 | 3384 | } else { |
mgerdin@5023 | 3385 | MutexLockerEx ml(vsm()->lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 3386 | |
goetz@6337 | 3387 | if (word_size < TreeChunk<Metablock, FreeList<Metablock> >::min_size()) { |
jmasa@4196 | 3388 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 3389 | #ifdef ASSERT |
jmasa@4196 | 3390 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 3391 | #endif |
jmasa@4196 | 3392 | return; |
jmasa@4196 | 3393 | } |
hseigel@5528 | 3394 | if (is_class && using_class_space()) { |
jmasa@4196 | 3395 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3396 | } else { |
jmasa@4196 | 3397 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 3398 | } |
coleenp@4037 | 3399 | } |
coleenp@4037 | 3400 | } |
coleenp@4037 | 3401 | |
stefank@5863 | 3402 | |
stefank@5941 | 3403 | MetaWord* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
iklam@5208 | 3404 | bool read_only, MetaspaceObj::Type type, TRAPS) { |
coleenp@4037 | 3405 | if (HAS_PENDING_EXCEPTION) { |
coleenp@4037 | 3406 | assert(false, "Should not allocate with exception pending"); |
coleenp@4037 | 3407 | return NULL; // caller does a CHECK_NULL too |
coleenp@4037 | 3408 | } |
coleenp@4037 | 3409 | |
coleenp@4037 | 3410 | assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
coleenp@4037 | 3411 | "ClassLoaderData::the_null_class_loader_data() should have been used."); |
stefank@5863 | 3412 | |
coleenp@4037 | 3413 | // Allocate in metaspaces without taking out a lock, because it deadlocks |
coleenp@4037 | 3414 | // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
coleenp@4037 | 3415 | // to revisit this for application class data sharing. |
coleenp@4037 | 3416 | if (DumpSharedSpaces) { |
iklam@5208 | 3417 | assert(type > MetaspaceObj::UnknownType && type < MetaspaceObj::_number_of_types, "sanity"); |
iklam@5208 | 3418 | Metaspace* space = read_only ? loader_data->ro_metaspace() : loader_data->rw_metaspace(); |
stefank@5863 | 3419 | MetaWord* result = space->allocate(word_size, NonClassType); |
coleenp@4037 | 3420 | if (result == NULL) { |
coleenp@4037 | 3421 | report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
coleenp@4037 | 3422 | } |
stefank@5941 | 3423 | |
stefank@5941 | 3424 | space->record_allocation(result, type, space->vsm()->get_raw_word_size(word_size)); |
stefank@5941 | 3425 | |
stefank@5941 | 3426 | // Zero initialize. |
stefank@5941 | 3427 | Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); |
stefank@5941 | 3428 | |
stefank@5941 | 3429 | return result; |
coleenp@4037 | 3430 | } |
coleenp@4037 | 3431 | |
stefank@5863 | 3432 | MetadataType mdtype = (type == MetaspaceObj::ClassType) ? ClassType : NonClassType; |
stefank@5863 | 3433 | |
stefank@5863 | 3434 | // Try to allocate metadata. |
stefank@5863 | 3435 | MetaWord* result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
coleenp@4037 | 3436 | |
coleenp@4037 | 3437 | if (result == NULL) { |
ehelin@6418 | 3438 | tracer()->report_metaspace_allocation_failure(loader_data, word_size, type, mdtype); |
ehelin@6418 | 3439 | |
stefank@5863 | 3440 | // Allocation failed. |
stefank@5863 | 3441 | if (is_init_completed()) { |
stefank@5863 | 3442 | // Only start a GC if the bootstrapping has completed. |
stefank@5863 | 3443 | |
stefank@5863 | 3444 | // Try to clean out some memory and retry. |
stefank@5863 | 3445 | result = Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
stefank@5863 | 3446 | loader_data, word_size, mdtype); |
coleenp@4037 | 3447 | } |
coleenp@4037 | 3448 | } |
stefank@5863 | 3449 | |
stefank@5863 | 3450 | if (result == NULL) { |
ehelin@6419 | 3451 | report_metadata_oome(loader_data, word_size, type, mdtype, CHECK_NULL); |
stefank@5863 | 3452 | } |
stefank@5863 | 3453 | |
stefank@5941 | 3454 | // Zero initialize. |
stefank@5941 | 3455 | Copy::fill_to_aligned_words((HeapWord*)result, word_size, 0); |
stefank@5941 | 3456 | |
stefank@5941 | 3457 | return result; |
coleenp@4037 | 3458 | } |
coleenp@4037 | 3459 | |
hseigel@6027 | 3460 | size_t Metaspace::class_chunk_size(size_t word_size) { |
hseigel@6027 | 3461 | assert(using_class_space(), "Has to use class space"); |
hseigel@6027 | 3462 | return class_vsm()->calc_chunk_size(word_size); |
hseigel@6027 | 3463 | } |
hseigel@6027 | 3464 | |
ehelin@6419 | 3465 | void Metaspace::report_metadata_oome(ClassLoaderData* loader_data, size_t word_size, MetaspaceObj::Type type, MetadataType mdtype, TRAPS) { |
ehelin@6419 | 3466 | tracer()->report_metadata_oom(loader_data, word_size, type, mdtype); |
ehelin@6419 | 3467 | |
stefank@5863 | 3468 | // If result is still null, we are out of memory. |
stefank@5863 | 3469 | if (Verbose && TraceMetadataChunkAllocation) { |
stefank@5863 | 3470 | gclog_or_tty->print_cr("Metaspace allocation failed for size " |
stefank@5863 | 3471 | SIZE_FORMAT, word_size); |
stefank@5863 | 3472 | if (loader_data->metaspace_or_null() != NULL) { |
stefank@5863 | 3473 | loader_data->dump(gclog_or_tty); |
stefank@5863 | 3474 | } |
stefank@5863 | 3475 | MetaspaceAux::dump(gclog_or_tty); |
stefank@5863 | 3476 | } |
stefank@5863 | 3477 | |
hseigel@6027 | 3478 | bool out_of_compressed_class_space = false; |
hseigel@6027 | 3479 | if (is_class_space_allocation(mdtype)) { |
hseigel@6027 | 3480 | Metaspace* metaspace = loader_data->metaspace_non_null(); |
hseigel@6027 | 3481 | out_of_compressed_class_space = |
hseigel@6027 | 3482 | MetaspaceAux::committed_bytes(Metaspace::ClassType) + |
hseigel@6027 | 3483 | (metaspace->class_chunk_size(word_size) * BytesPerWord) > |
hseigel@6027 | 3484 | CompressedClassSpaceSize; |
hseigel@6027 | 3485 | } |
hseigel@6027 | 3486 | |
stefank@5863 | 3487 | // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
hseigel@6027 | 3488 | const char* space_string = out_of_compressed_class_space ? |
hseigel@6027 | 3489 | "Compressed class space" : "Metaspace"; |
hseigel@6027 | 3490 | |
stefank@5863 | 3491 | report_java_out_of_memory(space_string); |
stefank@5863 | 3492 | |
stefank@5863 | 3493 | if (JvmtiExport::should_post_resource_exhausted()) { |
stefank@5863 | 3494 | JvmtiExport::post_resource_exhausted( |
stefank@5863 | 3495 | JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
stefank@5863 | 3496 | space_string); |
stefank@5863 | 3497 | } |
stefank@5863 | 3498 | |
stefank@5863 | 3499 | if (!is_init_completed()) { |
stefank@5863 | 3500 | vm_exit_during_initialization("OutOfMemoryError", space_string); |
stefank@5863 | 3501 | } |
stefank@5863 | 3502 | |
hseigel@6027 | 3503 | if (out_of_compressed_class_space) { |
stefank@5863 | 3504 | THROW_OOP(Universe::out_of_memory_error_class_metaspace()); |
stefank@5863 | 3505 | } else { |
stefank@5863 | 3506 | THROW_OOP(Universe::out_of_memory_error_metaspace()); |
stefank@5863 | 3507 | } |
stefank@5863 | 3508 | } |
stefank@5863 | 3509 | |
ehelin@6418 | 3510 | const char* Metaspace::metadata_type_name(Metaspace::MetadataType mdtype) { |
ehelin@6418 | 3511 | switch (mdtype) { |
ehelin@6418 | 3512 | case Metaspace::ClassType: return "Class"; |
ehelin@6418 | 3513 | case Metaspace::NonClassType: return "Metadata"; |
ehelin@6418 | 3514 | default: |
ehelin@6418 | 3515 | assert(false, err_msg("Got bad mdtype: %d", (int) mdtype)); |
ehelin@6418 | 3516 | return NULL; |
ehelin@6418 | 3517 | } |
ehelin@6418 | 3518 | } |
ehelin@6418 | 3519 | |
iklam@5208 | 3520 | void Metaspace::record_allocation(void* ptr, MetaspaceObj::Type type, size_t word_size) { |
iklam@5208 | 3521 | assert(DumpSharedSpaces, "sanity"); |
iklam@5208 | 3522 | |
iklam@5208 | 3523 | AllocRecord *rec = new AllocRecord((address)ptr, type, (int)word_size * HeapWordSize); |
iklam@5208 | 3524 | if (_alloc_record_head == NULL) { |
iklam@5208 | 3525 | _alloc_record_head = _alloc_record_tail = rec; |
iklam@5208 | 3526 | } else { |
iklam@5208 | 3527 | _alloc_record_tail->_next = rec; |
iklam@5208 | 3528 | _alloc_record_tail = rec; |
iklam@5208 | 3529 | } |
iklam@5208 | 3530 | } |
iklam@5208 | 3531 | |
iklam@5208 | 3532 | void Metaspace::iterate(Metaspace::AllocRecordClosure *closure) { |
iklam@5208 | 3533 | assert(DumpSharedSpaces, "unimplemented for !DumpSharedSpaces"); |
iklam@5208 | 3534 | |
iklam@5208 | 3535 | address last_addr = (address)bottom(); |
iklam@5208 | 3536 | |
iklam@5208 | 3537 | for (AllocRecord *rec = _alloc_record_head; rec; rec = rec->_next) { |
iklam@5208 | 3538 | address ptr = rec->_ptr; |
iklam@5208 | 3539 | if (last_addr < ptr) { |
iklam@5208 | 3540 | closure->doit(last_addr, MetaspaceObj::UnknownType, ptr - last_addr); |
iklam@5208 | 3541 | } |
iklam@5208 | 3542 | closure->doit(ptr, rec->_type, rec->_byte_size); |
iklam@5208 | 3543 | last_addr = ptr + rec->_byte_size; |
iklam@5208 | 3544 | } |
iklam@5208 | 3545 | |
iklam@5208 | 3546 | address top = ((address)bottom()) + used_bytes_slow(Metaspace::NonClassType); |
iklam@5208 | 3547 | if (last_addr < top) { |
iklam@5208 | 3548 | closure->doit(last_addr, MetaspaceObj::UnknownType, top - last_addr); |
iklam@5208 | 3549 | } |
iklam@5208 | 3550 | } |
iklam@5208 | 3551 | |
stefank@5771 | 3552 | void Metaspace::purge(MetadataType mdtype) { |
stefank@5771 | 3553 | get_space_list(mdtype)->purge(get_chunk_manager(mdtype)); |
stefank@5771 | 3554 | } |
stefank@5771 | 3555 | |
jmasa@5007 | 3556 | void Metaspace::purge() { |
jmasa@5007 | 3557 | MutexLockerEx cl(SpaceManager::expand_lock(), |
jmasa@5007 | 3558 | Mutex::_no_safepoint_check_flag); |
stefank@5771 | 3559 | purge(NonClassType); |
hseigel@5528 | 3560 | if (using_class_space()) { |
stefank@5771 | 3561 | purge(ClassType); |
hseigel@5528 | 3562 | } |
jmasa@5007 | 3563 | } |
jmasa@5007 | 3564 | |
coleenp@4037 | 3565 | void Metaspace::print_on(outputStream* out) const { |
coleenp@4037 | 3566 | // Print both class virtual space counts and metaspace. |
coleenp@4037 | 3567 | if (Verbose) { |
hseigel@5528 | 3568 | vsm()->print_on(out); |
hseigel@5528 | 3569 | if (using_class_space()) { |
coleenp@4037 | 3570 | class_vsm()->print_on(out); |
hseigel@5528 | 3571 | } |
coleenp@4037 | 3572 | } |
coleenp@4037 | 3573 | } |
coleenp@4037 | 3574 | |
coleenp@6305 | 3575 | bool Metaspace::contains(const void* ptr) { |
coleenp@6678 | 3576 | if (UseSharedSpaces && MetaspaceShared::is_in_shared_space(ptr)) { |
coleenp@6678 | 3577 | return true; |
coleenp@4037 | 3578 | } |
coleenp@6678 | 3579 | |
coleenp@6678 | 3580 | if (using_class_space() && get_space_list(ClassType)->contains(ptr)) { |
coleenp@6678 | 3581 | return true; |
coleenp@6678 | 3582 | } |
coleenp@6678 | 3583 | |
coleenp@6678 | 3584 | return get_space_list(NonClassType)->contains(ptr); |
coleenp@4037 | 3585 | } |
coleenp@4037 | 3586 | |
coleenp@4037 | 3587 | void Metaspace::verify() { |
coleenp@4037 | 3588 | vsm()->verify(); |
hseigel@5528 | 3589 | if (using_class_space()) { |
hseigel@5528 | 3590 | class_vsm()->verify(); |
hseigel@5528 | 3591 | } |
coleenp@4037 | 3592 | } |
coleenp@4037 | 3593 | |
coleenp@4037 | 3594 | void Metaspace::dump(outputStream* const out) const { |
coleenp@4037 | 3595 | out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
coleenp@4037 | 3596 | vsm()->dump(out); |
hseigel@5528 | 3597 | if (using_class_space()) { |
hseigel@5528 | 3598 | out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
hseigel@5528 | 3599 | class_vsm()->dump(out); |
hseigel@5528 | 3600 | } |
coleenp@4037 | 3601 | } |
stefank@5704 | 3602 | |
stefank@5704 | 3603 | /////////////// Unit tests /////////////// |
stefank@5704 | 3604 | |
stefank@5704 | 3605 | #ifndef PRODUCT |
stefank@5704 | 3606 | |
brutisso@5774 | 3607 | class TestMetaspaceAuxTest : AllStatic { |
stefank@5704 | 3608 | public: |
stefank@5704 | 3609 | static void test_reserved() { |
stefank@5704 | 3610 | size_t reserved = MetaspaceAux::reserved_bytes(); |
stefank@5704 | 3611 | |
stefank@5704 | 3612 | assert(reserved > 0, "assert"); |
stefank@5704 | 3613 | |
stefank@5704 | 3614 | size_t committed = MetaspaceAux::committed_bytes(); |
stefank@5704 | 3615 | assert(committed <= reserved, "assert"); |
stefank@5704 | 3616 | |
stefank@5704 | 3617 | size_t reserved_metadata = MetaspaceAux::reserved_bytes(Metaspace::NonClassType); |
stefank@5704 | 3618 | assert(reserved_metadata > 0, "assert"); |
stefank@5704 | 3619 | assert(reserved_metadata <= reserved, "assert"); |
stefank@5704 | 3620 | |
stefank@5704 | 3621 | if (UseCompressedClassPointers) { |
stefank@5704 | 3622 | size_t reserved_class = MetaspaceAux::reserved_bytes(Metaspace::ClassType); |
stefank@5704 | 3623 | assert(reserved_class > 0, "assert"); |
stefank@5704 | 3624 | assert(reserved_class < reserved, "assert"); |
stefank@5704 | 3625 | } |
stefank@5704 | 3626 | } |
stefank@5704 | 3627 | |
stefank@5704 | 3628 | static void test_committed() { |
stefank@5704 | 3629 | size_t committed = MetaspaceAux::committed_bytes(); |
stefank@5704 | 3630 | |
stefank@5704 | 3631 | assert(committed > 0, "assert"); |
stefank@5704 | 3632 | |
stefank@5704 | 3633 | size_t reserved = MetaspaceAux::reserved_bytes(); |
stefank@5704 | 3634 | assert(committed <= reserved, "assert"); |
stefank@5704 | 3635 | |
stefank@5704 | 3636 | size_t committed_metadata = MetaspaceAux::committed_bytes(Metaspace::NonClassType); |
stefank@5704 | 3637 | assert(committed_metadata > 0, "assert"); |
stefank@5704 | 3638 | assert(committed_metadata <= committed, "assert"); |
stefank@5704 | 3639 | |
stefank@5704 | 3640 | if (UseCompressedClassPointers) { |
stefank@5704 | 3641 | size_t committed_class = MetaspaceAux::committed_bytes(Metaspace::ClassType); |
stefank@5704 | 3642 | assert(committed_class > 0, "assert"); |
stefank@5704 | 3643 | assert(committed_class < committed, "assert"); |
stefank@5704 | 3644 | } |
stefank@5704 | 3645 | } |
stefank@5704 | 3646 | |
brutisso@5774 | 3647 | static void test_virtual_space_list_large_chunk() { |
brutisso@5774 | 3648 | VirtualSpaceList* vs_list = new VirtualSpaceList(os::vm_allocation_granularity()); |
brutisso@5774 | 3649 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
brutisso@5774 | 3650 | // A size larger than VirtualSpaceSize (256k) and add one page to make it _not_ be |
brutisso@5774 | 3651 | // vm_allocation_granularity aligned on Windows. |
brutisso@5774 | 3652 | size_t large_size = (size_t)(2*256*K + (os::vm_page_size()/BytesPerWord)); |
brutisso@5774 | 3653 | large_size += (os::vm_page_size()/BytesPerWord); |
brutisso@5774 | 3654 | vs_list->get_new_chunk(large_size, large_size, 0); |
brutisso@5774 | 3655 | } |
brutisso@5774 | 3656 | |
stefank@5704 | 3657 | static void test() { |
stefank@5704 | 3658 | test_reserved(); |
stefank@5704 | 3659 | test_committed(); |
brutisso@5774 | 3660 | test_virtual_space_list_large_chunk(); |
stefank@5704 | 3661 | } |
stefank@5704 | 3662 | }; |
stefank@5704 | 3663 | |
brutisso@5774 | 3664 | void TestMetaspaceAux_test() { |
brutisso@5774 | 3665 | TestMetaspaceAuxTest::test(); |
stefank@5704 | 3666 | } |
stefank@5704 | 3667 | |
mgerdin@6004 | 3668 | class TestVirtualSpaceNodeTest { |
mgerdin@6004 | 3669 | static void chunk_up(size_t words_left, size_t& num_medium_chunks, |
mgerdin@6004 | 3670 | size_t& num_small_chunks, |
mgerdin@6004 | 3671 | size_t& num_specialized_chunks) { |
mgerdin@6004 | 3672 | num_medium_chunks = words_left / MediumChunk; |
mgerdin@6004 | 3673 | words_left = words_left % MediumChunk; |
mgerdin@6004 | 3674 | |
mgerdin@6004 | 3675 | num_small_chunks = words_left / SmallChunk; |
mgerdin@6004 | 3676 | words_left = words_left % SmallChunk; |
mgerdin@6004 | 3677 | // how many specialized chunks can we get? |
mgerdin@6004 | 3678 | num_specialized_chunks = words_left / SpecializedChunk; |
mgerdin@6004 | 3679 | assert(words_left % SpecializedChunk == 0, "should be nothing left"); |
mgerdin@6004 | 3680 | } |
mgerdin@6004 | 3681 | |
mgerdin@6004 | 3682 | public: |
mgerdin@6004 | 3683 | static void test() { |
mgerdin@6004 | 3684 | MutexLockerEx ml(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
mgerdin@6004 | 3685 | const size_t vsn_test_size_words = MediumChunk * 4; |
mgerdin@6004 | 3686 | const size_t vsn_test_size_bytes = vsn_test_size_words * BytesPerWord; |
mgerdin@6004 | 3687 | |
mgerdin@6004 | 3688 | // The chunk sizes must be multiples of eachother, or this will fail |
mgerdin@6004 | 3689 | STATIC_ASSERT(MediumChunk % SmallChunk == 0); |
mgerdin@6004 | 3690 | STATIC_ASSERT(SmallChunk % SpecializedChunk == 0); |
mgerdin@6004 | 3691 | |
mgerdin@6004 | 3692 | { // No committed memory in VSN |
mgerdin@6004 | 3693 | ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
mgerdin@6004 | 3694 | VirtualSpaceNode vsn(vsn_test_size_bytes); |
mgerdin@6004 | 3695 | vsn.initialize(); |
mgerdin@6004 | 3696 | vsn.retire(&cm); |
mgerdin@6004 | 3697 | assert(cm.sum_free_chunks_count() == 0, "did not commit any memory in the VSN"); |
mgerdin@6004 | 3698 | } |
mgerdin@6004 | 3699 | |
mgerdin@6004 | 3700 | { // All of VSN is committed, half is used by chunks |
mgerdin@6004 | 3701 | ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
mgerdin@6004 | 3702 | VirtualSpaceNode vsn(vsn_test_size_bytes); |
mgerdin@6004 | 3703 | vsn.initialize(); |
mgerdin@6004 | 3704 | vsn.expand_by(vsn_test_size_words, vsn_test_size_words); |
mgerdin@6004 | 3705 | vsn.get_chunk_vs(MediumChunk); |
mgerdin@6004 | 3706 | vsn.get_chunk_vs(MediumChunk); |
mgerdin@6004 | 3707 | vsn.retire(&cm); |
mgerdin@6004 | 3708 | assert(cm.sum_free_chunks_count() == 2, "should have been memory left for 2 medium chunks"); |
mgerdin@6004 | 3709 | assert(cm.sum_free_chunks() == 2*MediumChunk, "sizes should add up"); |
mgerdin@6004 | 3710 | } |
mgerdin@6004 | 3711 | |
mgerdin@6004 | 3712 | { // 4 pages of VSN is committed, some is used by chunks |
mgerdin@6004 | 3713 | ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
mgerdin@6004 | 3714 | VirtualSpaceNode vsn(vsn_test_size_bytes); |
mgerdin@6004 | 3715 | const size_t page_chunks = 4 * (size_t)os::vm_page_size() / BytesPerWord; |
mgerdin@6004 | 3716 | assert(page_chunks < MediumChunk, "Test expects medium chunks to be at least 4*page_size"); |
mgerdin@6004 | 3717 | vsn.initialize(); |
mgerdin@6004 | 3718 | vsn.expand_by(page_chunks, page_chunks); |
mgerdin@6004 | 3719 | vsn.get_chunk_vs(SmallChunk); |
mgerdin@6004 | 3720 | vsn.get_chunk_vs(SpecializedChunk); |
mgerdin@6004 | 3721 | vsn.retire(&cm); |
mgerdin@6004 | 3722 | |
mgerdin@6004 | 3723 | // committed - used = words left to retire |
mgerdin@6004 | 3724 | const size_t words_left = page_chunks - SmallChunk - SpecializedChunk; |
mgerdin@6004 | 3725 | |
mgerdin@6004 | 3726 | size_t num_medium_chunks, num_small_chunks, num_spec_chunks; |
mgerdin@6004 | 3727 | chunk_up(words_left, num_medium_chunks, num_small_chunks, num_spec_chunks); |
mgerdin@6004 | 3728 | |
mgerdin@6004 | 3729 | assert(num_medium_chunks == 0, "should not get any medium chunks"); |
mgerdin@6004 | 3730 | assert(cm.sum_free_chunks_count() == (num_small_chunks + num_spec_chunks), "should be space for 3 chunks"); |
mgerdin@6004 | 3731 | assert(cm.sum_free_chunks() == words_left, "sizes should add up"); |
mgerdin@6004 | 3732 | } |
mgerdin@6004 | 3733 | |
mgerdin@6004 | 3734 | { // Half of VSN is committed, a humongous chunk is used |
mgerdin@6004 | 3735 | ChunkManager cm(SpecializedChunk, SmallChunk, MediumChunk); |
mgerdin@6004 | 3736 | VirtualSpaceNode vsn(vsn_test_size_bytes); |
mgerdin@6004 | 3737 | vsn.initialize(); |
mgerdin@6004 | 3738 | vsn.expand_by(MediumChunk * 2, MediumChunk * 2); |
mgerdin@6004 | 3739 | vsn.get_chunk_vs(MediumChunk + SpecializedChunk); // Humongous chunks will be aligned up to MediumChunk + SpecializedChunk |
mgerdin@6004 | 3740 | vsn.retire(&cm); |
mgerdin@6004 | 3741 | |
mgerdin@6004 | 3742 | const size_t words_left = MediumChunk * 2 - (MediumChunk + SpecializedChunk); |
mgerdin@6004 | 3743 | size_t num_medium_chunks, num_small_chunks, num_spec_chunks; |
mgerdin@6004 | 3744 | chunk_up(words_left, num_medium_chunks, num_small_chunks, num_spec_chunks); |
mgerdin@6004 | 3745 | |
mgerdin@6004 | 3746 | assert(num_medium_chunks == 0, "should not get any medium chunks"); |
mgerdin@6004 | 3747 | assert(cm.sum_free_chunks_count() == (num_small_chunks + num_spec_chunks), "should be space for 3 chunks"); |
mgerdin@6004 | 3748 | assert(cm.sum_free_chunks() == words_left, "sizes should add up"); |
mgerdin@6004 | 3749 | } |
mgerdin@6004 | 3750 | |
mgerdin@6004 | 3751 | } |
stefank@6170 | 3752 | |
stefank@6170 | 3753 | #define assert_is_available_positive(word_size) \ |
stefank@6170 | 3754 | assert(vsn.is_available(word_size), \ |
stefank@6170 | 3755 | err_msg(#word_size ": " PTR_FORMAT " bytes were not available in " \ |
stefank@6170 | 3756 | "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \ |
stefank@6170 | 3757 | (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end())); |
stefank@6170 | 3758 | |
stefank@6170 | 3759 | #define assert_is_available_negative(word_size) \ |
stefank@6170 | 3760 | assert(!vsn.is_available(word_size), \ |
stefank@6170 | 3761 | err_msg(#word_size ": " PTR_FORMAT " bytes should not be available in " \ |
stefank@6170 | 3762 | "VirtualSpaceNode [" PTR_FORMAT ", " PTR_FORMAT ")", \ |
stefank@6170 | 3763 | (uintptr_t)(word_size * BytesPerWord), vsn.bottom(), vsn.end())); |
stefank@6170 | 3764 | |
stefank@6170 | 3765 | static void test_is_available_positive() { |
stefank@6170 | 3766 | // Reserve some memory. |
stefank@6170 | 3767 | VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
stefank@6170 | 3768 | assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
stefank@6170 | 3769 | |
stefank@6170 | 3770 | // Commit some memory. |
stefank@6170 | 3771 | size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
stefank@6170 | 3772 | bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
stefank@6170 | 3773 | assert(expanded, "Failed to commit"); |
stefank@6170 | 3774 | |
stefank@6170 | 3775 | // Check that is_available accepts the committed size. |
stefank@6170 | 3776 | assert_is_available_positive(commit_word_size); |
stefank@6170 | 3777 | |
stefank@6170 | 3778 | // Check that is_available accepts half the committed size. |
stefank@6170 | 3779 | size_t expand_word_size = commit_word_size / 2; |
stefank@6170 | 3780 | assert_is_available_positive(expand_word_size); |
stefank@6170 | 3781 | } |
stefank@6170 | 3782 | |
stefank@6170 | 3783 | static void test_is_available_negative() { |
stefank@6170 | 3784 | // Reserve some memory. |
stefank@6170 | 3785 | VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
stefank@6170 | 3786 | assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
stefank@6170 | 3787 | |
stefank@6170 | 3788 | // Commit some memory. |
stefank@6170 | 3789 | size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
stefank@6170 | 3790 | bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
stefank@6170 | 3791 | assert(expanded, "Failed to commit"); |
stefank@6170 | 3792 | |
stefank@6170 | 3793 | // Check that is_available doesn't accept a too large size. |
stefank@6170 | 3794 | size_t two_times_commit_word_size = commit_word_size * 2; |
stefank@6170 | 3795 | assert_is_available_negative(two_times_commit_word_size); |
stefank@6170 | 3796 | } |
stefank@6170 | 3797 | |
stefank@6170 | 3798 | static void test_is_available_overflow() { |
stefank@6170 | 3799 | // Reserve some memory. |
stefank@6170 | 3800 | VirtualSpaceNode vsn(os::vm_allocation_granularity()); |
stefank@6170 | 3801 | assert(vsn.initialize(), "Failed to setup VirtualSpaceNode"); |
stefank@6170 | 3802 | |
stefank@6170 | 3803 | // Commit some memory. |
stefank@6170 | 3804 | size_t commit_word_size = os::vm_allocation_granularity() / BytesPerWord; |
stefank@6170 | 3805 | bool expanded = vsn.expand_by(commit_word_size, commit_word_size); |
stefank@6170 | 3806 | assert(expanded, "Failed to commit"); |
stefank@6170 | 3807 | |
stefank@6170 | 3808 | // Calculate a size that will overflow the virtual space size. |
stefank@6170 | 3809 | void* virtual_space_max = (void*)(uintptr_t)-1; |
stefank@6170 | 3810 | size_t bottom_to_max = pointer_delta(virtual_space_max, vsn.bottom(), 1); |
stefank@6170 | 3811 | size_t overflow_size = bottom_to_max + BytesPerWord; |
stefank@6170 | 3812 | size_t overflow_word_size = overflow_size / BytesPerWord; |
stefank@6170 | 3813 | |
stefank@6170 | 3814 | // Check that is_available can handle the overflow. |
stefank@6170 | 3815 | assert_is_available_negative(overflow_word_size); |
stefank@6170 | 3816 | } |
stefank@6170 | 3817 | |
stefank@6170 | 3818 | static void test_is_available() { |
stefank@6170 | 3819 | TestVirtualSpaceNodeTest::test_is_available_positive(); |
stefank@6170 | 3820 | TestVirtualSpaceNodeTest::test_is_available_negative(); |
stefank@6170 | 3821 | TestVirtualSpaceNodeTest::test_is_available_overflow(); |
stefank@6170 | 3822 | } |
mgerdin@6004 | 3823 | }; |
mgerdin@6004 | 3824 | |
mgerdin@6004 | 3825 | void TestVirtualSpaceNode_test() { |
mgerdin@6004 | 3826 | TestVirtualSpaceNodeTest::test(); |
stefank@6170 | 3827 | TestVirtualSpaceNodeTest::test_is_available(); |
mgerdin@6004 | 3828 | } |
stefank@5704 | 3829 | #endif |