Thu, 29 Nov 2012 10:09:04 -0800
8003554: NPG: move Metablock and Metachunk code out of metaspace.cpp
Reviewed-by: coleenp
coleenp@4037 | 1 | /* |
coleenp@4037 | 2 | * Copyright (c) 2011, 2012, 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" |
coleenp@4037 | 26 | #include "memory/binaryTreeDictionary.hpp" |
jmasa@4196 | 27 | #include "memory/freeList.hpp" |
coleenp@4037 | 28 | #include "memory/collectorPolicy.hpp" |
coleenp@4037 | 29 | #include "memory/filemap.hpp" |
coleenp@4037 | 30 | #include "memory/freeList.hpp" |
jmasa@4196 | 31 | #include "memory/metablock.hpp" |
jmasa@4196 | 32 | #include "memory/metachunk.hpp" |
coleenp@4037 | 33 | #include "memory/metaspace.hpp" |
coleenp@4037 | 34 | #include "memory/metaspaceShared.hpp" |
coleenp@4037 | 35 | #include "memory/resourceArea.hpp" |
coleenp@4037 | 36 | #include "memory/universe.hpp" |
coleenp@4037 | 37 | #include "runtime/globals.hpp" |
coleenp@4037 | 38 | #include "runtime/mutex.hpp" |
coleenp@4295 | 39 | #include "runtime/orderAccess.hpp" |
coleenp@4037 | 40 | #include "services/memTracker.hpp" |
coleenp@4037 | 41 | #include "utilities/copy.hpp" |
coleenp@4037 | 42 | #include "utilities/debug.hpp" |
coleenp@4037 | 43 | |
jmasa@4196 | 44 | typedef BinaryTreeDictionary<Metablock, FreeList> BlockTreeDictionary; |
jmasa@4196 | 45 | typedef BinaryTreeDictionary<Metachunk, FreeList> ChunkTreeDictionary; |
mgerdin@4264 | 46 | // Define this macro to enable slow integrity checking of |
mgerdin@4264 | 47 | // the free chunk lists |
mgerdin@4264 | 48 | const bool metaspace_slow_verify = false; |
mgerdin@4264 | 49 | |
coleenp@4037 | 50 | |
coleenp@4037 | 51 | // Parameters for stress mode testing |
coleenp@4037 | 52 | const uint metadata_deallocate_a_lot_block = 10; |
coleenp@4037 | 53 | const uint metadata_deallocate_a_lock_chunk = 3; |
coleenp@4037 | 54 | size_t const allocation_from_dictionary_limit = 64 * K; |
coleenp@4037 | 55 | const size_t metadata_deallocate = 0xf5f5f5f5; |
coleenp@4037 | 56 | |
coleenp@4037 | 57 | MetaWord* last_allocated = 0; |
coleenp@4037 | 58 | |
coleenp@4037 | 59 | // Used in declarations in SpaceManager and ChunkManager |
coleenp@4037 | 60 | enum ChunkIndex { |
coleenp@4037 | 61 | SmallIndex = 0, |
coleenp@4037 | 62 | MediumIndex = 1, |
coleenp@4037 | 63 | HumongousIndex = 2, |
jmasa@4196 | 64 | NumberOfFreeLists = 2, |
jmasa@4196 | 65 | NumberOfInUseLists = 3 |
coleenp@4037 | 66 | }; |
coleenp@4037 | 67 | |
coleenp@4037 | 68 | static ChunkIndex next_chunk_index(ChunkIndex i) { |
jmasa@4196 | 69 | assert(i < NumberOfInUseLists, "Out of bound"); |
coleenp@4037 | 70 | return (ChunkIndex) (i+1); |
coleenp@4037 | 71 | } |
coleenp@4037 | 72 | |
coleenp@4037 | 73 | // Originally _capacity_until_GC was set to MetaspaceSize here but |
coleenp@4037 | 74 | // the default MetaspaceSize before argument processing was being |
coleenp@4037 | 75 | // used which was not the desired value. See the code |
coleenp@4037 | 76 | // in should_expand() to see how the initialization is handled |
coleenp@4037 | 77 | // now. |
coleenp@4037 | 78 | size_t MetaspaceGC::_capacity_until_GC = 0; |
coleenp@4037 | 79 | bool MetaspaceGC::_expand_after_GC = false; |
coleenp@4037 | 80 | uint MetaspaceGC::_shrink_factor = 0; |
coleenp@4037 | 81 | bool MetaspaceGC::_should_concurrent_collect = false; |
coleenp@4037 | 82 | |
coleenp@4037 | 83 | // Blocks of space for metadata are allocated out of Metachunks. |
coleenp@4037 | 84 | // |
coleenp@4037 | 85 | // Metachunk are allocated out of MetadataVirtualspaces and once |
coleenp@4037 | 86 | // allocated there is no explicit link between a Metachunk and |
coleenp@4037 | 87 | // the MetadataVirtualspaces from which it was allocated. |
coleenp@4037 | 88 | // |
coleenp@4037 | 89 | // Each SpaceManager maintains a |
coleenp@4037 | 90 | // list of the chunks it is using and the current chunk. The current |
coleenp@4037 | 91 | // chunk is the chunk from which allocations are done. Space freed in |
coleenp@4037 | 92 | // a chunk is placed on the free list of blocks (BlockFreelist) and |
coleenp@4037 | 93 | // reused from there. |
coleenp@4037 | 94 | |
coleenp@4037 | 95 | // Pointer to list of Metachunks. |
coleenp@4037 | 96 | class ChunkList VALUE_OBJ_CLASS_SPEC { |
coleenp@4037 | 97 | // List of free chunks |
coleenp@4037 | 98 | Metachunk* _head; |
coleenp@4037 | 99 | |
coleenp@4037 | 100 | public: |
coleenp@4037 | 101 | // Constructor |
coleenp@4037 | 102 | ChunkList() : _head(NULL) {} |
coleenp@4037 | 103 | |
coleenp@4037 | 104 | // Accessors |
coleenp@4037 | 105 | Metachunk* head() { return _head; } |
coleenp@4037 | 106 | void set_head(Metachunk* v) { _head = v; } |
coleenp@4037 | 107 | |
coleenp@4037 | 108 | // Link at head of the list |
coleenp@4037 | 109 | void add_at_head(Metachunk* head, Metachunk* tail); |
coleenp@4037 | 110 | void add_at_head(Metachunk* head); |
coleenp@4037 | 111 | |
coleenp@4037 | 112 | size_t sum_list_size(); |
coleenp@4037 | 113 | size_t sum_list_count(); |
coleenp@4037 | 114 | size_t sum_list_capacity(); |
coleenp@4037 | 115 | }; |
coleenp@4037 | 116 | |
coleenp@4037 | 117 | // Manages the global free lists of chunks. |
coleenp@4037 | 118 | // Has three lists of free chunks, and a total size and |
coleenp@4037 | 119 | // count that includes all three |
coleenp@4037 | 120 | |
coleenp@4037 | 121 | class ChunkManager VALUE_OBJ_CLASS_SPEC { |
coleenp@4037 | 122 | |
coleenp@4037 | 123 | // Free list of chunks of different sizes. |
coleenp@4037 | 124 | // SmallChunk |
coleenp@4037 | 125 | // MediumChunk |
coleenp@4037 | 126 | // HumongousChunk |
jmasa@4196 | 127 | ChunkList _free_chunks[NumberOfFreeLists]; |
jmasa@4196 | 128 | |
jmasa@4196 | 129 | // HumongousChunk |
jmasa@4196 | 130 | ChunkTreeDictionary _humongous_dictionary; |
coleenp@4037 | 131 | |
coleenp@4037 | 132 | // ChunkManager in all lists of this type |
coleenp@4037 | 133 | size_t _free_chunks_total; |
coleenp@4037 | 134 | size_t _free_chunks_count; |
coleenp@4037 | 135 | |
coleenp@4037 | 136 | void dec_free_chunks_total(size_t v) { |
coleenp@4037 | 137 | assert(_free_chunks_count > 0 && |
coleenp@4037 | 138 | _free_chunks_total > 0, |
coleenp@4037 | 139 | "About to go negative"); |
coleenp@4037 | 140 | Atomic::add_ptr(-1, &_free_chunks_count); |
coleenp@4037 | 141 | jlong minus_v = (jlong) - (jlong) v; |
coleenp@4037 | 142 | Atomic::add_ptr(minus_v, &_free_chunks_total); |
coleenp@4037 | 143 | } |
coleenp@4037 | 144 | |
coleenp@4037 | 145 | // Debug support |
coleenp@4037 | 146 | |
coleenp@4037 | 147 | size_t sum_free_chunks(); |
coleenp@4037 | 148 | size_t sum_free_chunks_count(); |
coleenp@4037 | 149 | |
coleenp@4037 | 150 | void locked_verify_free_chunks_total(); |
mgerdin@4264 | 151 | void slow_locked_verify_free_chunks_total() { |
mgerdin@4264 | 152 | if (metaspace_slow_verify) { |
mgerdin@4264 | 153 | locked_verify_free_chunks_total(); |
mgerdin@4264 | 154 | } |
mgerdin@4264 | 155 | } |
coleenp@4037 | 156 | void locked_verify_free_chunks_count(); |
mgerdin@4264 | 157 | void slow_locked_verify_free_chunks_count() { |
mgerdin@4264 | 158 | if (metaspace_slow_verify) { |
mgerdin@4264 | 159 | locked_verify_free_chunks_count(); |
mgerdin@4264 | 160 | } |
mgerdin@4264 | 161 | } |
coleenp@4037 | 162 | void verify_free_chunks_count(); |
coleenp@4037 | 163 | |
coleenp@4037 | 164 | public: |
coleenp@4037 | 165 | |
coleenp@4037 | 166 | ChunkManager() : _free_chunks_total(0), _free_chunks_count(0) {} |
coleenp@4037 | 167 | |
coleenp@4037 | 168 | // add or delete (return) a chunk to the global freelist. |
coleenp@4037 | 169 | Metachunk* chunk_freelist_allocate(size_t word_size); |
coleenp@4037 | 170 | void chunk_freelist_deallocate(Metachunk* chunk); |
coleenp@4037 | 171 | |
coleenp@4037 | 172 | // Total of the space in the free chunks list |
coleenp@4037 | 173 | size_t free_chunks_total(); |
coleenp@4037 | 174 | size_t free_chunks_total_in_bytes(); |
coleenp@4037 | 175 | |
coleenp@4037 | 176 | // Number of chunks in the free chunks list |
coleenp@4037 | 177 | size_t free_chunks_count(); |
coleenp@4037 | 178 | |
coleenp@4037 | 179 | void inc_free_chunks_total(size_t v, size_t count = 1) { |
coleenp@4037 | 180 | Atomic::add_ptr(count, &_free_chunks_count); |
coleenp@4037 | 181 | Atomic::add_ptr(v, &_free_chunks_total); |
coleenp@4037 | 182 | } |
coleenp@4037 | 183 | ChunkList* free_medium_chunks() { return &_free_chunks[1]; } |
coleenp@4037 | 184 | ChunkList* free_small_chunks() { return &_free_chunks[0]; } |
jmasa@4196 | 185 | ChunkTreeDictionary* humongous_dictionary() { |
jmasa@4196 | 186 | return &_humongous_dictionary; |
jmasa@4196 | 187 | } |
coleenp@4037 | 188 | |
coleenp@4037 | 189 | ChunkList* free_chunks(ChunkIndex index); |
coleenp@4037 | 190 | |
coleenp@4037 | 191 | // Returns the list for the given chunk word size. |
coleenp@4037 | 192 | ChunkList* find_free_chunks_list(size_t word_size); |
coleenp@4037 | 193 | |
coleenp@4037 | 194 | // Add and remove from a list by size. Selects |
coleenp@4037 | 195 | // list based on size of chunk. |
coleenp@4037 | 196 | void free_chunks_put(Metachunk* chuck); |
coleenp@4037 | 197 | Metachunk* free_chunks_get(size_t chunk_word_size); |
coleenp@4037 | 198 | |
coleenp@4037 | 199 | // Debug support |
coleenp@4037 | 200 | void verify(); |
mgerdin@4264 | 201 | void slow_verify() { |
mgerdin@4264 | 202 | if (metaspace_slow_verify) { |
mgerdin@4264 | 203 | verify(); |
mgerdin@4264 | 204 | } |
mgerdin@4264 | 205 | } |
coleenp@4037 | 206 | void locked_verify(); |
mgerdin@4264 | 207 | void slow_locked_verify() { |
mgerdin@4264 | 208 | if (metaspace_slow_verify) { |
mgerdin@4264 | 209 | locked_verify(); |
mgerdin@4264 | 210 | } |
mgerdin@4264 | 211 | } |
coleenp@4037 | 212 | void verify_free_chunks_total(); |
coleenp@4037 | 213 | |
coleenp@4037 | 214 | void locked_print_free_chunks(outputStream* st); |
coleenp@4037 | 215 | void locked_print_sum_free_chunks(outputStream* st); |
jmasa@4196 | 216 | |
jmasa@4196 | 217 | void print_on(outputStream* st); |
coleenp@4037 | 218 | }; |
coleenp@4037 | 219 | |
coleenp@4037 | 220 | |
coleenp@4037 | 221 | // Used to manage the free list of Metablocks (a block corresponds |
coleenp@4037 | 222 | // to the allocation of a quantum of metadata). |
coleenp@4037 | 223 | class BlockFreelist VALUE_OBJ_CLASS_SPEC { |
jmasa@4196 | 224 | BlockTreeDictionary* _dictionary; |
jmasa@4196 | 225 | static Metablock* initialize_free_chunk(MetaWord* p, size_t word_size); |
jmasa@4196 | 226 | |
coleenp@4037 | 227 | // Accessors |
jmasa@4196 | 228 | BlockTreeDictionary* dictionary() const { return _dictionary; } |
coleenp@4037 | 229 | |
coleenp@4037 | 230 | public: |
coleenp@4037 | 231 | BlockFreelist(); |
coleenp@4037 | 232 | ~BlockFreelist(); |
coleenp@4037 | 233 | |
coleenp@4037 | 234 | // Get and return a block to the free list |
jmasa@4196 | 235 | MetaWord* get_block(size_t word_size); |
jmasa@4196 | 236 | void return_block(MetaWord* p, size_t word_size); |
jmasa@4196 | 237 | |
jmasa@4196 | 238 | size_t total_size() { |
jmasa@4196 | 239 | if (dictionary() == NULL) { |
coleenp@4037 | 240 | return 0; |
jmasa@4196 | 241 | } else { |
jmasa@4196 | 242 | return dictionary()->total_size(); |
coleenp@4037 | 243 | } |
jmasa@4196 | 244 | } |
coleenp@4037 | 245 | |
coleenp@4037 | 246 | void print_on(outputStream* st) const; |
coleenp@4037 | 247 | }; |
coleenp@4037 | 248 | |
coleenp@4037 | 249 | class VirtualSpaceNode : public CHeapObj<mtClass> { |
coleenp@4037 | 250 | friend class VirtualSpaceList; |
coleenp@4037 | 251 | |
coleenp@4037 | 252 | // Link to next VirtualSpaceNode |
coleenp@4037 | 253 | VirtualSpaceNode* _next; |
coleenp@4037 | 254 | |
coleenp@4037 | 255 | // total in the VirtualSpace |
coleenp@4037 | 256 | MemRegion _reserved; |
coleenp@4037 | 257 | ReservedSpace _rs; |
coleenp@4037 | 258 | VirtualSpace _virtual_space; |
coleenp@4037 | 259 | MetaWord* _top; |
coleenp@4037 | 260 | |
coleenp@4037 | 261 | // Convenience functions for logical bottom and end |
coleenp@4037 | 262 | MetaWord* bottom() const { return (MetaWord*) _virtual_space.low(); } |
coleenp@4037 | 263 | MetaWord* end() const { return (MetaWord*) _virtual_space.high(); } |
coleenp@4037 | 264 | |
coleenp@4037 | 265 | // Convenience functions to access the _virtual_space |
coleenp@4037 | 266 | char* low() const { return virtual_space()->low(); } |
coleenp@4037 | 267 | char* high() const { return virtual_space()->high(); } |
coleenp@4037 | 268 | |
coleenp@4037 | 269 | public: |
coleenp@4037 | 270 | |
coleenp@4037 | 271 | VirtualSpaceNode(size_t byte_size); |
coleenp@4037 | 272 | VirtualSpaceNode(ReservedSpace rs) : _top(NULL), _next(NULL), _rs(rs) {} |
coleenp@4037 | 273 | ~VirtualSpaceNode(); |
coleenp@4037 | 274 | |
coleenp@4037 | 275 | // address of next available space in _virtual_space; |
coleenp@4037 | 276 | // Accessors |
coleenp@4037 | 277 | VirtualSpaceNode* next() { return _next; } |
coleenp@4037 | 278 | void set_next(VirtualSpaceNode* v) { _next = v; } |
coleenp@4037 | 279 | |
coleenp@4037 | 280 | void set_reserved(MemRegion const v) { _reserved = v; } |
coleenp@4037 | 281 | void set_top(MetaWord* v) { _top = v; } |
coleenp@4037 | 282 | |
coleenp@4037 | 283 | // Accessors |
coleenp@4037 | 284 | MemRegion* reserved() { return &_reserved; } |
coleenp@4037 | 285 | VirtualSpace* virtual_space() const { return (VirtualSpace*) &_virtual_space; } |
coleenp@4037 | 286 | |
coleenp@4037 | 287 | // Returns true if "word_size" is available in the virtual space |
coleenp@4037 | 288 | bool is_available(size_t word_size) { return _top + word_size <= end(); } |
coleenp@4037 | 289 | |
coleenp@4037 | 290 | MetaWord* top() const { return _top; } |
coleenp@4037 | 291 | void inc_top(size_t word_size) { _top += word_size; } |
coleenp@4037 | 292 | |
coleenp@4037 | 293 | // used and capacity in this single entry in the list |
coleenp@4037 | 294 | size_t used_words_in_vs() const; |
coleenp@4037 | 295 | size_t capacity_words_in_vs() const; |
coleenp@4037 | 296 | |
coleenp@4037 | 297 | bool initialize(); |
coleenp@4037 | 298 | |
coleenp@4037 | 299 | // get space from the virtual space |
coleenp@4037 | 300 | Metachunk* take_from_committed(size_t chunk_word_size); |
coleenp@4037 | 301 | |
coleenp@4037 | 302 | // Allocate a chunk from the virtual space and return it. |
coleenp@4037 | 303 | Metachunk* get_chunk_vs(size_t chunk_word_size); |
coleenp@4037 | 304 | Metachunk* get_chunk_vs_with_expand(size_t chunk_word_size); |
coleenp@4037 | 305 | |
coleenp@4037 | 306 | // Expands/shrinks the committed space in a virtual space. Delegates |
coleenp@4037 | 307 | // to Virtualspace |
coleenp@4037 | 308 | bool expand_by(size_t words, bool pre_touch = false); |
coleenp@4037 | 309 | bool shrink_by(size_t words); |
coleenp@4037 | 310 | |
coleenp@4304 | 311 | #ifdef ASSERT |
coleenp@4037 | 312 | // Debug support |
coleenp@4037 | 313 | static void verify_virtual_space_total(); |
coleenp@4037 | 314 | static void verify_virtual_space_count(); |
coleenp@4037 | 315 | void mangle(); |
coleenp@4304 | 316 | #endif |
coleenp@4037 | 317 | |
coleenp@4037 | 318 | void print_on(outputStream* st) const; |
coleenp@4037 | 319 | }; |
coleenp@4037 | 320 | |
coleenp@4037 | 321 | // byte_size is the size of the associated virtualspace. |
coleenp@4037 | 322 | VirtualSpaceNode::VirtualSpaceNode(size_t byte_size) : _top(NULL), _next(NULL), _rs(0) { |
coleenp@4037 | 323 | // This allocates memory with mmap. For DumpSharedspaces, allocate the |
coleenp@4037 | 324 | // space at low memory so that other shared images don't conflict. |
coleenp@4037 | 325 | // This is the same address as memory needed for UseCompressedOops but |
coleenp@4037 | 326 | // compressed oops don't work with CDS (offsets in metadata are wrong), so |
coleenp@4037 | 327 | // borrow the same address. |
coleenp@4037 | 328 | if (DumpSharedSpaces) { |
coleenp@4037 | 329 | char* shared_base = (char*)HeapBaseMinAddress; |
coleenp@4037 | 330 | _rs = ReservedSpace(byte_size, 0, false, shared_base, 0); |
coleenp@4037 | 331 | if (_rs.is_reserved()) { |
coleenp@4037 | 332 | assert(_rs.base() == shared_base, "should match"); |
coleenp@4037 | 333 | } else { |
coleenp@4037 | 334 | // If we are dumping the heap, then allocate a wasted block of address |
coleenp@4037 | 335 | // space in order to push the heap to a lower address. This extra |
coleenp@4037 | 336 | // address range allows for other (or larger) libraries to be loaded |
coleenp@4037 | 337 | // without them occupying the space required for the shared spaces. |
coleenp@4037 | 338 | uintx reserved = 0; |
coleenp@4037 | 339 | uintx block_size = 64*1024*1024; |
coleenp@4037 | 340 | while (reserved < SharedDummyBlockSize) { |
coleenp@4037 | 341 | char* dummy = os::reserve_memory(block_size); |
coleenp@4037 | 342 | reserved += block_size; |
coleenp@4037 | 343 | } |
coleenp@4037 | 344 | _rs = ReservedSpace(byte_size); |
coleenp@4037 | 345 | } |
coleenp@4037 | 346 | MetaspaceShared::set_shared_rs(&_rs); |
coleenp@4037 | 347 | } else { |
coleenp@4037 | 348 | _rs = ReservedSpace(byte_size); |
coleenp@4037 | 349 | } |
coleenp@4037 | 350 | |
coleenp@4037 | 351 | MemTracker::record_virtual_memory_type((address)_rs.base(), mtClass); |
coleenp@4037 | 352 | } |
coleenp@4037 | 353 | |
coleenp@4037 | 354 | // List of VirtualSpaces for metadata allocation. |
coleenp@4037 | 355 | // It has a _next link for singly linked list and a MemRegion |
coleenp@4037 | 356 | // for total space in the VirtualSpace. |
coleenp@4037 | 357 | class VirtualSpaceList : public CHeapObj<mtClass> { |
coleenp@4037 | 358 | friend class VirtualSpaceNode; |
coleenp@4037 | 359 | |
coleenp@4037 | 360 | enum VirtualSpaceSizes { |
coleenp@4037 | 361 | VirtualSpaceSize = 256 * K |
coleenp@4037 | 362 | }; |
coleenp@4037 | 363 | |
coleenp@4037 | 364 | // Global list of virtual spaces |
coleenp@4037 | 365 | // Head of the list |
coleenp@4037 | 366 | VirtualSpaceNode* _virtual_space_list; |
coleenp@4037 | 367 | // virtual space currently being used for allocations |
coleenp@4037 | 368 | VirtualSpaceNode* _current_virtual_space; |
coleenp@4037 | 369 | // Free chunk list for all other metadata |
coleenp@4037 | 370 | ChunkManager _chunk_manager; |
coleenp@4037 | 371 | |
coleenp@4037 | 372 | // Can this virtual list allocate >1 spaces? Also, used to determine |
coleenp@4037 | 373 | // whether to allocate unlimited small chunks in this virtual space |
coleenp@4037 | 374 | bool _is_class; |
coleenp@4037 | 375 | bool can_grow() const { return !is_class() || !UseCompressedKlassPointers; } |
coleenp@4037 | 376 | |
coleenp@4037 | 377 | // Sum of space in all virtual spaces and number of virtual spaces |
coleenp@4037 | 378 | size_t _virtual_space_total; |
coleenp@4037 | 379 | size_t _virtual_space_count; |
coleenp@4037 | 380 | |
coleenp@4037 | 381 | ~VirtualSpaceList(); |
coleenp@4037 | 382 | |
coleenp@4037 | 383 | VirtualSpaceNode* virtual_space_list() const { return _virtual_space_list; } |
coleenp@4037 | 384 | |
coleenp@4037 | 385 | void set_virtual_space_list(VirtualSpaceNode* v) { |
coleenp@4037 | 386 | _virtual_space_list = v; |
coleenp@4037 | 387 | } |
coleenp@4037 | 388 | void set_current_virtual_space(VirtualSpaceNode* v) { |
coleenp@4037 | 389 | _current_virtual_space = v; |
coleenp@4037 | 390 | } |
coleenp@4037 | 391 | |
coleenp@4037 | 392 | void link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size); |
coleenp@4037 | 393 | |
coleenp@4037 | 394 | // Get another virtual space and add it to the list. This |
coleenp@4037 | 395 | // is typically prompted by a failed attempt to allocate a chunk |
coleenp@4037 | 396 | // and is typically followed by the allocation of a chunk. |
coleenp@4037 | 397 | bool grow_vs(size_t vs_word_size); |
coleenp@4037 | 398 | |
coleenp@4037 | 399 | public: |
coleenp@4037 | 400 | VirtualSpaceList(size_t word_size); |
coleenp@4037 | 401 | VirtualSpaceList(ReservedSpace rs); |
coleenp@4037 | 402 | |
coleenp@4037 | 403 | Metachunk* get_new_chunk(size_t word_size, size_t grow_chunks_by_words); |
coleenp@4037 | 404 | |
coleenp@4037 | 405 | VirtualSpaceNode* current_virtual_space() { |
coleenp@4037 | 406 | return _current_virtual_space; |
coleenp@4037 | 407 | } |
coleenp@4037 | 408 | |
coleenp@4037 | 409 | ChunkManager* chunk_manager() { return &_chunk_manager; } |
coleenp@4037 | 410 | bool is_class() const { return _is_class; } |
coleenp@4037 | 411 | |
coleenp@4037 | 412 | // Allocate the first virtualspace. |
coleenp@4037 | 413 | void initialize(size_t word_size); |
coleenp@4037 | 414 | |
coleenp@4037 | 415 | size_t virtual_space_total() { return _virtual_space_total; } |
coleenp@4037 | 416 | void inc_virtual_space_total(size_t v) { |
coleenp@4037 | 417 | Atomic::add_ptr(v, &_virtual_space_total); |
coleenp@4037 | 418 | } |
coleenp@4037 | 419 | |
coleenp@4037 | 420 | size_t virtual_space_count() { return _virtual_space_count; } |
coleenp@4037 | 421 | void inc_virtual_space_count() { |
coleenp@4037 | 422 | Atomic::inc_ptr(&_virtual_space_count); |
coleenp@4037 | 423 | } |
coleenp@4037 | 424 | |
coleenp@4037 | 425 | // Used and capacity in the entire list of virtual spaces. |
coleenp@4037 | 426 | // These are global values shared by all Metaspaces |
coleenp@4037 | 427 | size_t capacity_words_sum(); |
coleenp@4037 | 428 | size_t capacity_bytes_sum() { return capacity_words_sum() * BytesPerWord; } |
coleenp@4037 | 429 | size_t used_words_sum(); |
coleenp@4037 | 430 | size_t used_bytes_sum() { return used_words_sum() * BytesPerWord; } |
coleenp@4037 | 431 | |
coleenp@4037 | 432 | bool contains(const void *ptr); |
coleenp@4037 | 433 | |
coleenp@4037 | 434 | void print_on(outputStream* st) const; |
coleenp@4037 | 435 | |
coleenp@4037 | 436 | class VirtualSpaceListIterator : public StackObj { |
coleenp@4037 | 437 | VirtualSpaceNode* _virtual_spaces; |
coleenp@4037 | 438 | public: |
coleenp@4037 | 439 | VirtualSpaceListIterator(VirtualSpaceNode* virtual_spaces) : |
coleenp@4037 | 440 | _virtual_spaces(virtual_spaces) {} |
coleenp@4037 | 441 | |
coleenp@4037 | 442 | bool repeat() { |
coleenp@4037 | 443 | return _virtual_spaces != NULL; |
coleenp@4037 | 444 | } |
coleenp@4037 | 445 | |
coleenp@4037 | 446 | VirtualSpaceNode* get_next() { |
coleenp@4037 | 447 | VirtualSpaceNode* result = _virtual_spaces; |
coleenp@4037 | 448 | if (_virtual_spaces != NULL) { |
coleenp@4037 | 449 | _virtual_spaces = _virtual_spaces->next(); |
coleenp@4037 | 450 | } |
coleenp@4037 | 451 | return result; |
coleenp@4037 | 452 | } |
coleenp@4037 | 453 | }; |
coleenp@4037 | 454 | }; |
coleenp@4037 | 455 | |
coleenp@4037 | 456 | class Metadebug : AllStatic { |
coleenp@4037 | 457 | // Debugging support for Metaspaces |
coleenp@4037 | 458 | static int _deallocate_block_a_lot_count; |
coleenp@4037 | 459 | static int _deallocate_chunk_a_lot_count; |
coleenp@4037 | 460 | static int _allocation_fail_alot_count; |
coleenp@4037 | 461 | |
coleenp@4037 | 462 | public: |
coleenp@4037 | 463 | static int deallocate_block_a_lot_count() { |
coleenp@4037 | 464 | return _deallocate_block_a_lot_count; |
coleenp@4037 | 465 | } |
coleenp@4037 | 466 | static void set_deallocate_block_a_lot_count(int v) { |
coleenp@4037 | 467 | _deallocate_block_a_lot_count = v; |
coleenp@4037 | 468 | } |
coleenp@4037 | 469 | static void inc_deallocate_block_a_lot_count() { |
coleenp@4037 | 470 | _deallocate_block_a_lot_count++; |
coleenp@4037 | 471 | } |
coleenp@4037 | 472 | static int deallocate_chunk_a_lot_count() { |
coleenp@4037 | 473 | return _deallocate_chunk_a_lot_count; |
coleenp@4037 | 474 | } |
coleenp@4037 | 475 | static void reset_deallocate_chunk_a_lot_count() { |
coleenp@4037 | 476 | _deallocate_chunk_a_lot_count = 1; |
coleenp@4037 | 477 | } |
coleenp@4037 | 478 | static void inc_deallocate_chunk_a_lot_count() { |
coleenp@4037 | 479 | _deallocate_chunk_a_lot_count++; |
coleenp@4037 | 480 | } |
coleenp@4037 | 481 | |
coleenp@4037 | 482 | static void init_allocation_fail_alot_count(); |
coleenp@4037 | 483 | #ifdef ASSERT |
coleenp@4037 | 484 | static bool test_metadata_failure(); |
coleenp@4037 | 485 | #endif |
coleenp@4037 | 486 | |
coleenp@4037 | 487 | static void deallocate_chunk_a_lot(SpaceManager* sm, |
coleenp@4037 | 488 | size_t chunk_word_size); |
coleenp@4037 | 489 | static void deallocate_block_a_lot(SpaceManager* sm, |
coleenp@4037 | 490 | size_t chunk_word_size); |
coleenp@4037 | 491 | |
coleenp@4037 | 492 | }; |
coleenp@4037 | 493 | |
coleenp@4037 | 494 | int Metadebug::_deallocate_block_a_lot_count = 0; |
coleenp@4037 | 495 | int Metadebug::_deallocate_chunk_a_lot_count = 0; |
coleenp@4037 | 496 | int Metadebug::_allocation_fail_alot_count = 0; |
coleenp@4037 | 497 | |
coleenp@4037 | 498 | // SpaceManager - used by Metaspace to handle allocations |
coleenp@4037 | 499 | class SpaceManager : public CHeapObj<mtClass> { |
coleenp@4037 | 500 | friend class Metaspace; |
coleenp@4037 | 501 | friend class Metadebug; |
coleenp@4037 | 502 | |
coleenp@4037 | 503 | private: |
coleenp@4037 | 504 | // protects allocations and contains. |
coleenp@4037 | 505 | Mutex* const _lock; |
coleenp@4037 | 506 | |
coleenp@4037 | 507 | // List of chunks in use by this SpaceManager. Allocations |
coleenp@4037 | 508 | // are done from the current chunk. The list is used for deallocating |
coleenp@4037 | 509 | // chunks when the SpaceManager is freed. |
jmasa@4196 | 510 | Metachunk* _chunks_in_use[NumberOfInUseLists]; |
coleenp@4037 | 511 | Metachunk* _current_chunk; |
coleenp@4037 | 512 | |
coleenp@4037 | 513 | // Virtual space where allocation comes from. |
coleenp@4037 | 514 | VirtualSpaceList* _vs_list; |
coleenp@4037 | 515 | |
coleenp@4037 | 516 | // Number of small chunks to allocate to a manager |
coleenp@4037 | 517 | // If class space manager, small chunks are unlimited |
coleenp@4037 | 518 | static uint const _small_chunk_limit; |
coleenp@4037 | 519 | bool has_small_chunk_limit() { return !vs_list()->is_class(); } |
coleenp@4037 | 520 | |
coleenp@4037 | 521 | // Sum of all space in allocated chunks |
coleenp@4037 | 522 | size_t _allocation_total; |
coleenp@4037 | 523 | |
coleenp@4037 | 524 | // Free lists of blocks are per SpaceManager since they |
coleenp@4037 | 525 | // are assumed to be in chunks in use by the SpaceManager |
coleenp@4037 | 526 | // and all chunks in use by a SpaceManager are freed when |
coleenp@4037 | 527 | // the class loader using the SpaceManager is collected. |
coleenp@4037 | 528 | BlockFreelist _block_freelists; |
coleenp@4037 | 529 | |
coleenp@4037 | 530 | // protects virtualspace and chunk expansions |
coleenp@4037 | 531 | static const char* _expand_lock_name; |
coleenp@4037 | 532 | static const int _expand_lock_rank; |
coleenp@4037 | 533 | static Mutex* const _expand_lock; |
coleenp@4037 | 534 | |
coleenp@4037 | 535 | // Accessors |
coleenp@4037 | 536 | Metachunk* chunks_in_use(ChunkIndex index) const { return _chunks_in_use[index]; } |
coleenp@4037 | 537 | void set_chunks_in_use(ChunkIndex index, Metachunk* v) { _chunks_in_use[index] = v; } |
coleenp@4037 | 538 | |
coleenp@4037 | 539 | BlockFreelist* block_freelists() const { |
coleenp@4037 | 540 | return (BlockFreelist*) &_block_freelists; |
coleenp@4037 | 541 | } |
coleenp@4037 | 542 | |
coleenp@4037 | 543 | VirtualSpaceList* vs_list() const { return _vs_list; } |
coleenp@4037 | 544 | |
coleenp@4037 | 545 | Metachunk* current_chunk() const { return _current_chunk; } |
coleenp@4037 | 546 | void set_current_chunk(Metachunk* v) { |
coleenp@4037 | 547 | _current_chunk = v; |
coleenp@4037 | 548 | } |
coleenp@4037 | 549 | |
coleenp@4037 | 550 | Metachunk* find_current_chunk(size_t word_size); |
coleenp@4037 | 551 | |
coleenp@4037 | 552 | // Add chunk to the list of chunks in use |
coleenp@4037 | 553 | void add_chunk(Metachunk* v, bool make_current); |
coleenp@4037 | 554 | |
coleenp@4037 | 555 | Mutex* lock() const { return _lock; } |
coleenp@4037 | 556 | |
coleenp@4037 | 557 | public: |
coleenp@4037 | 558 | SpaceManager(Mutex* lock, VirtualSpaceList* vs_list); |
coleenp@4037 | 559 | ~SpaceManager(); |
coleenp@4037 | 560 | |
coleenp@4037 | 561 | enum ChunkSizes { // in words. |
coleenp@4037 | 562 | SmallChunk = 512, |
coleenp@4037 | 563 | MediumChunk = 8 * K, |
coleenp@4037 | 564 | MediumChunkBunch = 4 * MediumChunk |
coleenp@4037 | 565 | }; |
coleenp@4037 | 566 | |
coleenp@4037 | 567 | // Accessors |
coleenp@4037 | 568 | size_t allocation_total() const { return _allocation_total; } |
coleenp@4037 | 569 | void inc_allocation_total(size_t v) { Atomic::add_ptr(v, &_allocation_total); } |
coleenp@4037 | 570 | static bool is_humongous(size_t word_size) { return word_size > MediumChunk; } |
coleenp@4037 | 571 | |
coleenp@4037 | 572 | static Mutex* expand_lock() { return _expand_lock; } |
coleenp@4037 | 573 | |
coleenp@4037 | 574 | size_t sum_capacity_in_chunks_in_use() const; |
coleenp@4037 | 575 | size_t sum_used_in_chunks_in_use() const; |
coleenp@4037 | 576 | size_t sum_free_in_chunks_in_use() const; |
coleenp@4037 | 577 | size_t sum_waste_in_chunks_in_use() const; |
coleenp@4037 | 578 | size_t sum_waste_in_chunks_in_use(ChunkIndex index ) const; |
coleenp@4037 | 579 | |
coleenp@4037 | 580 | size_t sum_count_in_chunks_in_use(); |
coleenp@4037 | 581 | size_t sum_count_in_chunks_in_use(ChunkIndex i); |
coleenp@4037 | 582 | |
coleenp@4037 | 583 | // Block allocation and deallocation. |
coleenp@4037 | 584 | // Allocates a block from the current chunk |
coleenp@4037 | 585 | MetaWord* allocate(size_t word_size); |
coleenp@4037 | 586 | |
coleenp@4037 | 587 | // Helper for allocations |
jmasa@4196 | 588 | MetaWord* allocate_work(size_t word_size); |
coleenp@4037 | 589 | |
coleenp@4037 | 590 | // Returns a block to the per manager freelist |
jmasa@4196 | 591 | void deallocate(MetaWord* p, size_t word_size); |
coleenp@4037 | 592 | |
coleenp@4037 | 593 | // Based on the allocation size and a minimum chunk size, |
coleenp@4037 | 594 | // returned chunk size (for expanding space for chunk allocation). |
coleenp@4037 | 595 | size_t calc_chunk_size(size_t allocation_word_size); |
coleenp@4037 | 596 | |
coleenp@4037 | 597 | // Called when an allocation from the current chunk fails. |
coleenp@4037 | 598 | // Gets a new chunk (may require getting a new virtual space), |
coleenp@4037 | 599 | // and allocates from that chunk. |
jmasa@4196 | 600 | MetaWord* grow_and_allocate(size_t word_size); |
coleenp@4037 | 601 | |
coleenp@4037 | 602 | // debugging support. |
coleenp@4037 | 603 | |
coleenp@4037 | 604 | void dump(outputStream* const out) const; |
coleenp@4037 | 605 | void print_on(outputStream* st) const; |
coleenp@4037 | 606 | void locked_print_chunks_in_use_on(outputStream* st) const; |
coleenp@4037 | 607 | |
coleenp@4037 | 608 | void verify(); |
jmasa@4327 | 609 | void verify_chunk_size(Metachunk* chunk); |
coleenp@4304 | 610 | NOT_PRODUCT(void mangle_freed_chunks();) |
coleenp@4037 | 611 | #ifdef ASSERT |
coleenp@4037 | 612 | void verify_allocation_total(); |
coleenp@4037 | 613 | #endif |
coleenp@4037 | 614 | }; |
coleenp@4037 | 615 | |
coleenp@4037 | 616 | uint const SpaceManager::_small_chunk_limit = 4; |
coleenp@4037 | 617 | |
coleenp@4037 | 618 | const char* SpaceManager::_expand_lock_name = |
coleenp@4037 | 619 | "SpaceManager chunk allocation lock"; |
coleenp@4037 | 620 | const int SpaceManager::_expand_lock_rank = Monitor::leaf - 1; |
coleenp@4037 | 621 | Mutex* const SpaceManager::_expand_lock = |
coleenp@4037 | 622 | new Mutex(SpaceManager::_expand_lock_rank, |
coleenp@4037 | 623 | SpaceManager::_expand_lock_name, |
coleenp@4037 | 624 | Mutex::_allow_vm_block_flag); |
coleenp@4037 | 625 | |
coleenp@4037 | 626 | // BlockFreelist methods |
coleenp@4037 | 627 | |
coleenp@4037 | 628 | BlockFreelist::BlockFreelist() : _dictionary(NULL) {} |
coleenp@4037 | 629 | |
coleenp@4037 | 630 | BlockFreelist::~BlockFreelist() { |
coleenp@4037 | 631 | if (_dictionary != NULL) { |
coleenp@4037 | 632 | if (Verbose && TraceMetadataChunkAllocation) { |
coleenp@4037 | 633 | _dictionary->print_free_lists(gclog_or_tty); |
coleenp@4037 | 634 | } |
coleenp@4037 | 635 | delete _dictionary; |
coleenp@4037 | 636 | } |
coleenp@4037 | 637 | } |
coleenp@4037 | 638 | |
jmasa@4196 | 639 | Metablock* BlockFreelist::initialize_free_chunk(MetaWord* p, size_t word_size) { |
jmasa@4196 | 640 | Metablock* block = (Metablock*) p; |
jmasa@4196 | 641 | block->set_word_size(word_size); |
jmasa@4196 | 642 | block->set_prev(NULL); |
jmasa@4196 | 643 | block->set_next(NULL); |
jmasa@4196 | 644 | |
coleenp@4037 | 645 | return block; |
coleenp@4037 | 646 | } |
coleenp@4037 | 647 | |
jmasa@4196 | 648 | void BlockFreelist::return_block(MetaWord* p, size_t word_size) { |
jmasa@4196 | 649 | Metablock* free_chunk = initialize_free_chunk(p, word_size); |
coleenp@4037 | 650 | if (dictionary() == NULL) { |
jmasa@4196 | 651 | _dictionary = new BlockTreeDictionary(); |
coleenp@4037 | 652 | } |
jmasa@4196 | 653 | dictionary()->return_chunk(free_chunk); |
coleenp@4037 | 654 | } |
coleenp@4037 | 655 | |
jmasa@4196 | 656 | MetaWord* BlockFreelist::get_block(size_t word_size) { |
coleenp@4037 | 657 | if (dictionary() == NULL) { |
coleenp@4037 | 658 | return NULL; |
coleenp@4037 | 659 | } |
coleenp@4037 | 660 | |
jmasa@4196 | 661 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 662 | // Dark matter. Too small for dictionary. |
coleenp@4037 | 663 | return NULL; |
coleenp@4037 | 664 | } |
jmasa@4196 | 665 | |
jmasa@4196 | 666 | Metablock* free_block = |
jmasa@4196 | 667 | dictionary()->get_chunk(word_size, FreeBlockDictionary<Metablock>::exactly); |
jmasa@4196 | 668 | if (free_block == NULL) { |
jmasa@4196 | 669 | return NULL; |
jmasa@4196 | 670 | } |
jmasa@4196 | 671 | |
jmasa@4196 | 672 | return (MetaWord*) free_block; |
coleenp@4037 | 673 | } |
coleenp@4037 | 674 | |
coleenp@4037 | 675 | void BlockFreelist::print_on(outputStream* st) const { |
coleenp@4037 | 676 | if (dictionary() == NULL) { |
coleenp@4037 | 677 | return; |
coleenp@4037 | 678 | } |
coleenp@4037 | 679 | dictionary()->print_free_lists(st); |
coleenp@4037 | 680 | } |
coleenp@4037 | 681 | |
coleenp@4037 | 682 | // VirtualSpaceNode methods |
coleenp@4037 | 683 | |
coleenp@4037 | 684 | VirtualSpaceNode::~VirtualSpaceNode() { |
coleenp@4037 | 685 | _rs.release(); |
coleenp@4037 | 686 | } |
coleenp@4037 | 687 | |
coleenp@4037 | 688 | size_t VirtualSpaceNode::used_words_in_vs() const { |
coleenp@4037 | 689 | return pointer_delta(top(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 690 | } |
coleenp@4037 | 691 | |
coleenp@4037 | 692 | // Space committed in the VirtualSpace |
coleenp@4037 | 693 | size_t VirtualSpaceNode::capacity_words_in_vs() const { |
coleenp@4037 | 694 | return pointer_delta(end(), bottom(), sizeof(MetaWord)); |
coleenp@4037 | 695 | } |
coleenp@4037 | 696 | |
coleenp@4037 | 697 | |
coleenp@4037 | 698 | // Allocates the chunk from the virtual space only. |
coleenp@4037 | 699 | // This interface is also used internally for debugging. Not all |
coleenp@4037 | 700 | // chunks removed here are necessarily used for allocation. |
coleenp@4037 | 701 | Metachunk* VirtualSpaceNode::take_from_committed(size_t chunk_word_size) { |
coleenp@4037 | 702 | // Bottom of the new chunk |
coleenp@4037 | 703 | MetaWord* chunk_limit = top(); |
coleenp@4037 | 704 | assert(chunk_limit != NULL, "Not safe to call this method"); |
coleenp@4037 | 705 | |
coleenp@4037 | 706 | if (!is_available(chunk_word_size)) { |
coleenp@4037 | 707 | if (TraceMetadataChunkAllocation) { |
coleenp@4037 | 708 | tty->print("VirtualSpaceNode::take_from_committed() not available %d words ", chunk_word_size); |
coleenp@4037 | 709 | // Dump some information about the virtual space that is nearly full |
coleenp@4037 | 710 | print_on(tty); |
coleenp@4037 | 711 | } |
coleenp@4037 | 712 | return NULL; |
coleenp@4037 | 713 | } |
coleenp@4037 | 714 | |
coleenp@4037 | 715 | // Take the space (bump top on the current virtual space). |
coleenp@4037 | 716 | inc_top(chunk_word_size); |
coleenp@4037 | 717 | |
coleenp@4037 | 718 | // Point the chunk at the space |
coleenp@4037 | 719 | Metachunk* result = Metachunk::initialize(chunk_limit, chunk_word_size); |
coleenp@4037 | 720 | return result; |
coleenp@4037 | 721 | } |
coleenp@4037 | 722 | |
coleenp@4037 | 723 | |
coleenp@4037 | 724 | // Expand the virtual space (commit more of the reserved space) |
coleenp@4037 | 725 | bool VirtualSpaceNode::expand_by(size_t words, bool pre_touch) { |
coleenp@4037 | 726 | size_t bytes = words * BytesPerWord; |
coleenp@4037 | 727 | bool result = virtual_space()->expand_by(bytes, pre_touch); |
coleenp@4037 | 728 | if (TraceMetavirtualspaceAllocation && !result) { |
coleenp@4037 | 729 | gclog_or_tty->print_cr("VirtualSpaceNode::expand_by() failed " |
coleenp@4037 | 730 | "for byte size " SIZE_FORMAT, bytes); |
coleenp@4037 | 731 | virtual_space()->print(); |
coleenp@4037 | 732 | } |
coleenp@4037 | 733 | return result; |
coleenp@4037 | 734 | } |
coleenp@4037 | 735 | |
coleenp@4037 | 736 | // Shrink the virtual space (commit more of the reserved space) |
coleenp@4037 | 737 | bool VirtualSpaceNode::shrink_by(size_t words) { |
coleenp@4037 | 738 | size_t bytes = words * BytesPerWord; |
coleenp@4037 | 739 | virtual_space()->shrink_by(bytes); |
coleenp@4037 | 740 | return true; |
coleenp@4037 | 741 | } |
coleenp@4037 | 742 | |
coleenp@4037 | 743 | // Add another chunk to the chunk list. |
coleenp@4037 | 744 | |
coleenp@4037 | 745 | Metachunk* VirtualSpaceNode::get_chunk_vs(size_t chunk_word_size) { |
coleenp@4037 | 746 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 747 | Metachunk* result = NULL; |
coleenp@4037 | 748 | |
coleenp@4037 | 749 | return take_from_committed(chunk_word_size); |
coleenp@4037 | 750 | } |
coleenp@4037 | 751 | |
coleenp@4037 | 752 | Metachunk* VirtualSpaceNode::get_chunk_vs_with_expand(size_t chunk_word_size) { |
coleenp@4037 | 753 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 754 | |
coleenp@4037 | 755 | Metachunk* new_chunk = get_chunk_vs(chunk_word_size); |
coleenp@4037 | 756 | |
coleenp@4037 | 757 | if (new_chunk == NULL) { |
coleenp@4037 | 758 | // Only a small part of the virtualspace is committed when first |
coleenp@4037 | 759 | // allocated so committing more here can be expected. |
coleenp@4037 | 760 | size_t page_size_words = os::vm_page_size() / BytesPerWord; |
coleenp@4037 | 761 | size_t aligned_expand_vs_by_words = align_size_up(chunk_word_size, |
coleenp@4037 | 762 | page_size_words); |
coleenp@4037 | 763 | expand_by(aligned_expand_vs_by_words, false); |
coleenp@4037 | 764 | new_chunk = get_chunk_vs(chunk_word_size); |
coleenp@4037 | 765 | } |
coleenp@4037 | 766 | return new_chunk; |
coleenp@4037 | 767 | } |
coleenp@4037 | 768 | |
coleenp@4037 | 769 | bool VirtualSpaceNode::initialize() { |
coleenp@4037 | 770 | |
coleenp@4037 | 771 | if (!_rs.is_reserved()) { |
coleenp@4037 | 772 | return false; |
coleenp@4037 | 773 | } |
coleenp@4037 | 774 | |
coleenp@4037 | 775 | // Commit only 1 page instead of the whole reserved space _rs.size() |
coleenp@4037 | 776 | size_t committed_byte_size = os::vm_page_size(); |
coleenp@4037 | 777 | bool result = virtual_space()->initialize(_rs, committed_byte_size); |
coleenp@4037 | 778 | if (result) { |
coleenp@4037 | 779 | set_top((MetaWord*)virtual_space()->low()); |
coleenp@4037 | 780 | set_reserved(MemRegion((HeapWord*)_rs.base(), |
coleenp@4037 | 781 | (HeapWord*)(_rs.base() + _rs.size()))); |
coleenp@4038 | 782 | |
coleenp@4038 | 783 | assert(reserved()->start() == (HeapWord*) _rs.base(), |
coleenp@4038 | 784 | err_msg("Reserved start was not set properly " PTR_FORMAT |
coleenp@4038 | 785 | " != " PTR_FORMAT, reserved()->start(), _rs.base())); |
coleenp@4038 | 786 | assert(reserved()->word_size() == _rs.size() / BytesPerWord, |
coleenp@4038 | 787 | err_msg("Reserved size was not set properly " SIZE_FORMAT |
coleenp@4038 | 788 | " != " SIZE_FORMAT, reserved()->word_size(), |
coleenp@4038 | 789 | _rs.size() / BytesPerWord)); |
coleenp@4037 | 790 | } |
coleenp@4037 | 791 | |
coleenp@4037 | 792 | return result; |
coleenp@4037 | 793 | } |
coleenp@4037 | 794 | |
coleenp@4037 | 795 | void VirtualSpaceNode::print_on(outputStream* st) const { |
coleenp@4037 | 796 | size_t used = used_words_in_vs(); |
coleenp@4037 | 797 | size_t capacity = capacity_words_in_vs(); |
coleenp@4037 | 798 | VirtualSpace* vs = virtual_space(); |
coleenp@4037 | 799 | st->print_cr(" space @ " PTR_FORMAT " " SIZE_FORMAT "K, %3d%% used " |
coleenp@4037 | 800 | "[" PTR_FORMAT ", " PTR_FORMAT ", " |
coleenp@4037 | 801 | PTR_FORMAT ", " PTR_FORMAT ")", |
coleenp@4037 | 802 | vs, capacity / K, used * 100 / capacity, |
coleenp@4037 | 803 | bottom(), top(), end(), |
coleenp@4037 | 804 | vs->high_boundary()); |
coleenp@4037 | 805 | } |
coleenp@4037 | 806 | |
coleenp@4304 | 807 | #ifdef ASSERT |
coleenp@4037 | 808 | void VirtualSpaceNode::mangle() { |
coleenp@4037 | 809 | size_t word_size = capacity_words_in_vs(); |
coleenp@4037 | 810 | Copy::fill_to_words((HeapWord*) low(), word_size, 0xf1f1f1f1); |
coleenp@4037 | 811 | } |
coleenp@4304 | 812 | #endif // ASSERT |
coleenp@4037 | 813 | |
coleenp@4037 | 814 | // VirtualSpaceList methods |
coleenp@4037 | 815 | // Space allocated from the VirtualSpace |
coleenp@4037 | 816 | |
coleenp@4037 | 817 | VirtualSpaceList::~VirtualSpaceList() { |
coleenp@4037 | 818 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 819 | while (iter.repeat()) { |
coleenp@4037 | 820 | VirtualSpaceNode* vsl = iter.get_next(); |
coleenp@4037 | 821 | delete vsl; |
coleenp@4037 | 822 | } |
coleenp@4037 | 823 | } |
coleenp@4037 | 824 | |
coleenp@4037 | 825 | size_t VirtualSpaceList::used_words_sum() { |
coleenp@4037 | 826 | size_t allocated_by_vs = 0; |
coleenp@4037 | 827 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 828 | while (iter.repeat()) { |
coleenp@4037 | 829 | VirtualSpaceNode* vsl = iter.get_next(); |
coleenp@4037 | 830 | // Sum used region [bottom, top) in each virtualspace |
coleenp@4037 | 831 | allocated_by_vs += vsl->used_words_in_vs(); |
coleenp@4037 | 832 | } |
coleenp@4037 | 833 | assert(allocated_by_vs >= chunk_manager()->free_chunks_total(), |
coleenp@4037 | 834 | err_msg("Total in free chunks " SIZE_FORMAT |
coleenp@4037 | 835 | " greater than total from virtual_spaces " SIZE_FORMAT, |
coleenp@4037 | 836 | allocated_by_vs, chunk_manager()->free_chunks_total())); |
coleenp@4037 | 837 | size_t used = |
coleenp@4037 | 838 | allocated_by_vs - chunk_manager()->free_chunks_total(); |
coleenp@4037 | 839 | return used; |
coleenp@4037 | 840 | } |
coleenp@4037 | 841 | |
coleenp@4037 | 842 | // Space available in all MetadataVirtualspaces allocated |
coleenp@4037 | 843 | // for metadata. This is the upper limit on the capacity |
coleenp@4037 | 844 | // of chunks allocated out of all the MetadataVirtualspaces. |
coleenp@4037 | 845 | size_t VirtualSpaceList::capacity_words_sum() { |
coleenp@4037 | 846 | size_t capacity = 0; |
coleenp@4037 | 847 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 848 | while (iter.repeat()) { |
coleenp@4037 | 849 | VirtualSpaceNode* vsl = iter.get_next(); |
coleenp@4037 | 850 | capacity += vsl->capacity_words_in_vs(); |
coleenp@4037 | 851 | } |
coleenp@4037 | 852 | return capacity; |
coleenp@4037 | 853 | } |
coleenp@4037 | 854 | |
coleenp@4037 | 855 | VirtualSpaceList::VirtualSpaceList(size_t word_size ) : |
coleenp@4037 | 856 | _is_class(false), |
coleenp@4037 | 857 | _virtual_space_list(NULL), |
coleenp@4037 | 858 | _current_virtual_space(NULL), |
coleenp@4037 | 859 | _virtual_space_total(0), |
coleenp@4037 | 860 | _virtual_space_count(0) { |
coleenp@4037 | 861 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 862 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 863 | bool initialization_succeeded = grow_vs(word_size); |
coleenp@4037 | 864 | |
coleenp@4037 | 865 | assert(initialization_succeeded, |
coleenp@4037 | 866 | " VirtualSpaceList initialization should not fail"); |
coleenp@4037 | 867 | } |
coleenp@4037 | 868 | |
coleenp@4037 | 869 | VirtualSpaceList::VirtualSpaceList(ReservedSpace rs) : |
coleenp@4037 | 870 | _is_class(true), |
coleenp@4037 | 871 | _virtual_space_list(NULL), |
coleenp@4037 | 872 | _current_virtual_space(NULL), |
coleenp@4037 | 873 | _virtual_space_total(0), |
coleenp@4037 | 874 | _virtual_space_count(0) { |
coleenp@4037 | 875 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 876 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 877 | VirtualSpaceNode* class_entry = new VirtualSpaceNode(rs); |
coleenp@4037 | 878 | bool succeeded = class_entry->initialize(); |
coleenp@4037 | 879 | assert(succeeded, " VirtualSpaceList initialization should not fail"); |
coleenp@4037 | 880 | link_vs(class_entry, rs.size()/BytesPerWord); |
coleenp@4037 | 881 | } |
coleenp@4037 | 882 | |
coleenp@4037 | 883 | // Allocate another meta virtual space and add it to the list. |
coleenp@4037 | 884 | bool VirtualSpaceList::grow_vs(size_t vs_word_size) { |
coleenp@4037 | 885 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 886 | if (vs_word_size == 0) { |
coleenp@4037 | 887 | return false; |
coleenp@4037 | 888 | } |
coleenp@4037 | 889 | // Reserve the space |
coleenp@4037 | 890 | size_t vs_byte_size = vs_word_size * BytesPerWord; |
coleenp@4037 | 891 | assert(vs_byte_size % os::vm_page_size() == 0, "Not aligned"); |
coleenp@4037 | 892 | |
coleenp@4037 | 893 | // Allocate the meta virtual space and initialize it. |
coleenp@4037 | 894 | VirtualSpaceNode* new_entry = new VirtualSpaceNode(vs_byte_size); |
coleenp@4037 | 895 | if (!new_entry->initialize()) { |
coleenp@4037 | 896 | delete new_entry; |
coleenp@4037 | 897 | return false; |
coleenp@4037 | 898 | } else { |
coleenp@4295 | 899 | // ensure lock-free iteration sees fully initialized node |
coleenp@4295 | 900 | OrderAccess::storestore(); |
coleenp@4037 | 901 | link_vs(new_entry, vs_word_size); |
coleenp@4037 | 902 | return true; |
coleenp@4037 | 903 | } |
coleenp@4037 | 904 | } |
coleenp@4037 | 905 | |
coleenp@4037 | 906 | void VirtualSpaceList::link_vs(VirtualSpaceNode* new_entry, size_t vs_word_size) { |
coleenp@4037 | 907 | if (virtual_space_list() == NULL) { |
coleenp@4037 | 908 | set_virtual_space_list(new_entry); |
coleenp@4037 | 909 | } else { |
coleenp@4037 | 910 | current_virtual_space()->set_next(new_entry); |
coleenp@4037 | 911 | } |
coleenp@4037 | 912 | set_current_virtual_space(new_entry); |
coleenp@4037 | 913 | inc_virtual_space_total(vs_word_size); |
coleenp@4037 | 914 | inc_virtual_space_count(); |
coleenp@4037 | 915 | #ifdef ASSERT |
coleenp@4037 | 916 | new_entry->mangle(); |
coleenp@4037 | 917 | #endif |
coleenp@4037 | 918 | if (TraceMetavirtualspaceAllocation && Verbose) { |
coleenp@4037 | 919 | VirtualSpaceNode* vsl = current_virtual_space(); |
coleenp@4037 | 920 | vsl->print_on(tty); |
coleenp@4037 | 921 | } |
coleenp@4037 | 922 | } |
coleenp@4037 | 923 | |
coleenp@4037 | 924 | Metachunk* VirtualSpaceList::get_new_chunk(size_t word_size, |
coleenp@4037 | 925 | size_t grow_chunks_by_words) { |
coleenp@4037 | 926 | |
coleenp@4037 | 927 | // Get a chunk from the chunk freelist |
coleenp@4037 | 928 | Metachunk* next = chunk_manager()->chunk_freelist_allocate(grow_chunks_by_words); |
coleenp@4037 | 929 | |
coleenp@4037 | 930 | // Allocate a chunk out of the current virtual space. |
coleenp@4037 | 931 | if (next == NULL) { |
coleenp@4037 | 932 | next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 933 | } |
coleenp@4037 | 934 | |
coleenp@4037 | 935 | if (next == NULL) { |
coleenp@4037 | 936 | // Not enough room in current virtual space. Try to commit |
coleenp@4037 | 937 | // more space. |
coleenp@4037 | 938 | size_t expand_vs_by_words = MAX2((size_t)SpaceManager::MediumChunkBunch, |
coleenp@4037 | 939 | grow_chunks_by_words); |
coleenp@4037 | 940 | size_t page_size_words = os::vm_page_size() / BytesPerWord; |
coleenp@4037 | 941 | size_t aligned_expand_vs_by_words = align_size_up(expand_vs_by_words, |
coleenp@4037 | 942 | page_size_words); |
coleenp@4037 | 943 | bool vs_expanded = |
coleenp@4037 | 944 | current_virtual_space()->expand_by(aligned_expand_vs_by_words, false); |
coleenp@4037 | 945 | if (!vs_expanded) { |
coleenp@4037 | 946 | // Should the capacity of the metaspaces be expanded for |
coleenp@4037 | 947 | // this allocation? If it's the virtual space for classes and is |
coleenp@4037 | 948 | // being used for CompressedHeaders, don't allocate a new virtualspace. |
coleenp@4037 | 949 | if (can_grow() && MetaspaceGC::should_expand(this, word_size)) { |
coleenp@4037 | 950 | // Get another virtual space. |
coleenp@4037 | 951 | size_t grow_vs_words = |
coleenp@4037 | 952 | MAX2((size_t)VirtualSpaceSize, aligned_expand_vs_by_words); |
coleenp@4037 | 953 | if (grow_vs(grow_vs_words)) { |
coleenp@4037 | 954 | // Got it. It's on the list now. Get a chunk from it. |
coleenp@4037 | 955 | next = current_virtual_space()->get_chunk_vs_with_expand(grow_chunks_by_words); |
coleenp@4037 | 956 | } |
coleenp@4037 | 957 | if (TraceMetadataHumongousAllocation && SpaceManager::is_humongous(word_size)) { |
coleenp@4037 | 958 | gclog_or_tty->print_cr(" aligned_expand_vs_by_words " PTR_FORMAT, |
coleenp@4037 | 959 | aligned_expand_vs_by_words); |
coleenp@4037 | 960 | gclog_or_tty->print_cr(" grow_vs_words " PTR_FORMAT, |
coleenp@4037 | 961 | grow_vs_words); |
coleenp@4037 | 962 | } |
coleenp@4037 | 963 | } else { |
coleenp@4037 | 964 | // Allocation will fail and induce a GC |
coleenp@4037 | 965 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 966 | gclog_or_tty->print_cr("VirtualSpaceList::get_new_chunk():" |
coleenp@4037 | 967 | " Fail instead of expand the metaspace"); |
coleenp@4037 | 968 | } |
coleenp@4037 | 969 | } |
coleenp@4037 | 970 | } else { |
coleenp@4037 | 971 | // The virtual space expanded, get a new chunk |
coleenp@4037 | 972 | next = current_virtual_space()->get_chunk_vs(grow_chunks_by_words); |
coleenp@4037 | 973 | assert(next != NULL, "Just expanded, should succeed"); |
coleenp@4037 | 974 | } |
coleenp@4037 | 975 | } |
coleenp@4037 | 976 | |
coleenp@4037 | 977 | return next; |
coleenp@4037 | 978 | } |
coleenp@4037 | 979 | |
coleenp@4037 | 980 | void VirtualSpaceList::print_on(outputStream* st) const { |
coleenp@4037 | 981 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 982 | VirtualSpaceListIterator iter(virtual_space_list()); |
coleenp@4037 | 983 | while (iter.repeat()) { |
coleenp@4037 | 984 | VirtualSpaceNode* node = iter.get_next(); |
coleenp@4037 | 985 | node->print_on(st); |
coleenp@4037 | 986 | } |
coleenp@4037 | 987 | } |
coleenp@4037 | 988 | } |
coleenp@4037 | 989 | |
coleenp@4037 | 990 | bool VirtualSpaceList::contains(const void *ptr) { |
coleenp@4037 | 991 | VirtualSpaceNode* list = virtual_space_list(); |
coleenp@4037 | 992 | VirtualSpaceListIterator iter(list); |
coleenp@4037 | 993 | while (iter.repeat()) { |
coleenp@4037 | 994 | VirtualSpaceNode* node = iter.get_next(); |
coleenp@4037 | 995 | if (node->reserved()->contains(ptr)) { |
coleenp@4037 | 996 | return true; |
coleenp@4037 | 997 | } |
coleenp@4037 | 998 | } |
coleenp@4037 | 999 | return false; |
coleenp@4037 | 1000 | } |
coleenp@4037 | 1001 | |
coleenp@4037 | 1002 | |
coleenp@4037 | 1003 | // MetaspaceGC methods |
coleenp@4037 | 1004 | |
coleenp@4037 | 1005 | // VM_CollectForMetadataAllocation is the vm operation used to GC. |
coleenp@4037 | 1006 | // Within the VM operation after the GC the attempt to allocate the metadata |
coleenp@4037 | 1007 | // should succeed. If the GC did not free enough space for the metaspace |
coleenp@4037 | 1008 | // allocation, the HWM is increased so that another virtualspace will be |
coleenp@4037 | 1009 | // allocated for the metadata. With perm gen the increase in the perm |
coleenp@4037 | 1010 | // gen had bounds, MinMetaspaceExpansion and MaxMetaspaceExpansion. The |
coleenp@4037 | 1011 | // metaspace policy uses those as the small and large steps for the HWM. |
coleenp@4037 | 1012 | // |
coleenp@4037 | 1013 | // After the GC the compute_new_size() for MetaspaceGC is called to |
coleenp@4037 | 1014 | // resize the capacity of the metaspaces. The current implementation |
coleenp@4037 | 1015 | // is based on the flags MinHeapFreeRatio and MaxHeapFreeRatio used |
coleenp@4037 | 1016 | // to resize the Java heap by some GC's. New flags can be implemented |
coleenp@4037 | 1017 | // if really needed. MinHeapFreeRatio is used to calculate how much |
coleenp@4037 | 1018 | // free space is desirable in the metaspace capacity to decide how much |
coleenp@4037 | 1019 | // to increase the HWM. MaxHeapFreeRatio is used to decide how much |
coleenp@4037 | 1020 | // free space is desirable in the metaspace capacity before decreasing |
coleenp@4037 | 1021 | // the HWM. |
coleenp@4037 | 1022 | |
coleenp@4037 | 1023 | // Calculate the amount to increase the high water mark (HWM). |
coleenp@4037 | 1024 | // Increase by a minimum amount (MinMetaspaceExpansion) so that |
coleenp@4037 | 1025 | // another expansion is not requested too soon. If that is not |
coleenp@4037 | 1026 | // enough to satisfy the allocation (i.e. big enough for a word_size |
coleenp@4037 | 1027 | // allocation), increase by MaxMetaspaceExpansion. If that is still |
coleenp@4037 | 1028 | // not enough, expand by the size of the allocation (word_size) plus |
coleenp@4037 | 1029 | // some. |
coleenp@4037 | 1030 | size_t MetaspaceGC::delta_capacity_until_GC(size_t word_size) { |
coleenp@4037 | 1031 | size_t before_inc = MetaspaceGC::capacity_until_GC(); |
coleenp@4037 | 1032 | size_t min_delta_words = MinMetaspaceExpansion / BytesPerWord; |
coleenp@4037 | 1033 | size_t max_delta_words = MaxMetaspaceExpansion / BytesPerWord; |
coleenp@4037 | 1034 | size_t page_size_words = os::vm_page_size() / BytesPerWord; |
coleenp@4037 | 1035 | size_t size_delta_words = align_size_up(word_size, page_size_words); |
coleenp@4037 | 1036 | size_t delta_words = MAX2(size_delta_words, min_delta_words); |
coleenp@4037 | 1037 | if (delta_words > min_delta_words) { |
coleenp@4037 | 1038 | // Don't want to hit the high water mark on the next |
coleenp@4037 | 1039 | // allocation so make the delta greater than just enough |
coleenp@4037 | 1040 | // for this allocation. |
coleenp@4037 | 1041 | delta_words = MAX2(delta_words, max_delta_words); |
coleenp@4037 | 1042 | if (delta_words > max_delta_words) { |
coleenp@4037 | 1043 | // This allocation is large but the next ones are probably not |
coleenp@4037 | 1044 | // so increase by the minimum. |
coleenp@4037 | 1045 | delta_words = delta_words + min_delta_words; |
coleenp@4037 | 1046 | } |
coleenp@4037 | 1047 | } |
coleenp@4037 | 1048 | return delta_words; |
coleenp@4037 | 1049 | } |
coleenp@4037 | 1050 | |
coleenp@4037 | 1051 | bool MetaspaceGC::should_expand(VirtualSpaceList* vsl, size_t word_size) { |
coleenp@4037 | 1052 | |
coleenp@4037 | 1053 | // Class virtual space should always be expanded. Call GC for the other |
coleenp@4037 | 1054 | // metadata virtual space. |
coleenp@4037 | 1055 | if (vsl == Metaspace::class_space_list()) return true; |
coleenp@4037 | 1056 | |
coleenp@4037 | 1057 | // If the user wants a limit, impose one. |
coleenp@4037 | 1058 | size_t max_metaspace_size_words = MaxMetaspaceSize / BytesPerWord; |
coleenp@4037 | 1059 | size_t metaspace_size_words = MetaspaceSize / BytesPerWord; |
coleenp@4037 | 1060 | if (!FLAG_IS_DEFAULT(MaxMetaspaceSize) && |
coleenp@4037 | 1061 | vsl->capacity_words_sum() >= max_metaspace_size_words) { |
coleenp@4037 | 1062 | return false; |
coleenp@4037 | 1063 | } |
coleenp@4037 | 1064 | |
coleenp@4037 | 1065 | // If this is part of an allocation after a GC, expand |
coleenp@4037 | 1066 | // unconditionally. |
coleenp@4037 | 1067 | if(MetaspaceGC::expand_after_GC()) { |
coleenp@4037 | 1068 | return true; |
coleenp@4037 | 1069 | } |
coleenp@4037 | 1070 | |
coleenp@4037 | 1071 | // If the capacity is below the minimum capacity, allow the |
coleenp@4037 | 1072 | // expansion. Also set the high-water-mark (capacity_until_GC) |
coleenp@4037 | 1073 | // to that minimum capacity so that a GC will not be induced |
coleenp@4037 | 1074 | // until that minimum capacity is exceeded. |
coleenp@4037 | 1075 | if (vsl->capacity_words_sum() < metaspace_size_words || |
coleenp@4037 | 1076 | capacity_until_GC() == 0) { |
coleenp@4037 | 1077 | set_capacity_until_GC(metaspace_size_words); |
coleenp@4037 | 1078 | return true; |
coleenp@4037 | 1079 | } else { |
coleenp@4037 | 1080 | if (vsl->capacity_words_sum() < capacity_until_GC()) { |
coleenp@4037 | 1081 | return true; |
coleenp@4037 | 1082 | } else { |
coleenp@4037 | 1083 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1084 | gclog_or_tty->print_cr(" allocation request size " SIZE_FORMAT |
coleenp@4037 | 1085 | " capacity_until_GC " SIZE_FORMAT |
coleenp@4037 | 1086 | " capacity_words_sum " SIZE_FORMAT |
coleenp@4037 | 1087 | " used_words_sum " SIZE_FORMAT |
coleenp@4037 | 1088 | " free chunks " SIZE_FORMAT |
coleenp@4037 | 1089 | " free chunks count %d", |
coleenp@4037 | 1090 | word_size, |
coleenp@4037 | 1091 | capacity_until_GC(), |
coleenp@4037 | 1092 | vsl->capacity_words_sum(), |
coleenp@4037 | 1093 | vsl->used_words_sum(), |
coleenp@4037 | 1094 | vsl->chunk_manager()->free_chunks_total(), |
coleenp@4037 | 1095 | vsl->chunk_manager()->free_chunks_count()); |
coleenp@4037 | 1096 | } |
coleenp@4037 | 1097 | return false; |
coleenp@4037 | 1098 | } |
coleenp@4037 | 1099 | } |
coleenp@4037 | 1100 | } |
coleenp@4037 | 1101 | |
coleenp@4037 | 1102 | // Variables are in bytes |
coleenp@4037 | 1103 | |
coleenp@4037 | 1104 | void MetaspaceGC::compute_new_size() { |
coleenp@4037 | 1105 | assert(_shrink_factor <= 100, "invalid shrink factor"); |
coleenp@4037 | 1106 | uint current_shrink_factor = _shrink_factor; |
coleenp@4037 | 1107 | _shrink_factor = 0; |
coleenp@4037 | 1108 | |
coleenp@4037 | 1109 | VirtualSpaceList *vsl = Metaspace::space_list(); |
coleenp@4037 | 1110 | |
coleenp@4037 | 1111 | size_t capacity_after_gc = vsl->capacity_bytes_sum(); |
coleenp@4037 | 1112 | // Check to see if these two can be calculated without walking the CLDG |
coleenp@4037 | 1113 | size_t used_after_gc = vsl->used_bytes_sum(); |
coleenp@4037 | 1114 | size_t capacity_until_GC = vsl->capacity_bytes_sum(); |
coleenp@4037 | 1115 | size_t free_after_gc = capacity_until_GC - used_after_gc; |
coleenp@4037 | 1116 | |
coleenp@4037 | 1117 | const double minimum_free_percentage = MinHeapFreeRatio / 100.0; |
coleenp@4037 | 1118 | const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
coleenp@4037 | 1119 | |
coleenp@4037 | 1120 | const double min_tmp = used_after_gc / maximum_used_percentage; |
coleenp@4037 | 1121 | size_t minimum_desired_capacity = |
coleenp@4037 | 1122 | (size_t)MIN2(min_tmp, double(max_uintx)); |
coleenp@4037 | 1123 | // Don't shrink less than the initial generation size |
coleenp@4037 | 1124 | minimum_desired_capacity = MAX2(minimum_desired_capacity, |
coleenp@4037 | 1125 | MetaspaceSize); |
coleenp@4037 | 1126 | |
coleenp@4037 | 1127 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1128 | const double free_percentage = ((double)free_after_gc) / capacity_until_GC; |
coleenp@4037 | 1129 | gclog_or_tty->print_cr("\nMetaspaceGC::compute_new_size: "); |
coleenp@4037 | 1130 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1131 | " minimum_free_percentage: %6.2f" |
coleenp@4037 | 1132 | " maximum_used_percentage: %6.2f", |
coleenp@4037 | 1133 | minimum_free_percentage, |
coleenp@4037 | 1134 | maximum_used_percentage); |
coleenp@4037 | 1135 | double d_free_after_gc = free_after_gc / (double) K; |
coleenp@4037 | 1136 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1137 | " free_after_gc : %6.1fK" |
coleenp@4037 | 1138 | " used_after_gc : %6.1fK" |
coleenp@4037 | 1139 | " capacity_after_gc : %6.1fK" |
coleenp@4037 | 1140 | " metaspace HWM : %6.1fK", |
coleenp@4037 | 1141 | free_after_gc / (double) K, |
coleenp@4037 | 1142 | used_after_gc / (double) K, |
coleenp@4037 | 1143 | capacity_after_gc / (double) K, |
coleenp@4037 | 1144 | capacity_until_GC / (double) K); |
coleenp@4037 | 1145 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1146 | " free_percentage: %6.2f", |
coleenp@4037 | 1147 | free_percentage); |
coleenp@4037 | 1148 | } |
coleenp@4037 | 1149 | |
coleenp@4037 | 1150 | |
coleenp@4037 | 1151 | if (capacity_until_GC < minimum_desired_capacity) { |
coleenp@4037 | 1152 | // If we have less capacity below the metaspace HWM, then |
coleenp@4037 | 1153 | // increment the HWM. |
coleenp@4037 | 1154 | size_t expand_bytes = minimum_desired_capacity - capacity_until_GC; |
coleenp@4037 | 1155 | // Don't expand unless it's significant |
coleenp@4037 | 1156 | if (expand_bytes >= MinMetaspaceExpansion) { |
coleenp@4037 | 1157 | size_t expand_words = expand_bytes / BytesPerWord; |
coleenp@4037 | 1158 | MetaspaceGC::inc_capacity_until_GC(expand_words); |
coleenp@4037 | 1159 | } |
coleenp@4037 | 1160 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1161 | size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
coleenp@4037 | 1162 | gclog_or_tty->print_cr(" expanding:" |
coleenp@4037 | 1163 | " minimum_desired_capacity: %6.1fK" |
coleenp@4037 | 1164 | " expand_words: %6.1fK" |
coleenp@4037 | 1165 | " MinMetaspaceExpansion: %6.1fK" |
coleenp@4037 | 1166 | " new metaspace HWM: %6.1fK", |
coleenp@4037 | 1167 | minimum_desired_capacity / (double) K, |
coleenp@4037 | 1168 | expand_bytes / (double) K, |
coleenp@4037 | 1169 | MinMetaspaceExpansion / (double) K, |
coleenp@4037 | 1170 | new_capacity_until_GC / (double) K); |
coleenp@4037 | 1171 | } |
coleenp@4037 | 1172 | return; |
coleenp@4037 | 1173 | } |
coleenp@4037 | 1174 | |
coleenp@4037 | 1175 | // No expansion, now see if we want to shrink |
coleenp@4037 | 1176 | size_t shrink_words = 0; |
coleenp@4037 | 1177 | // We would never want to shrink more than this |
coleenp@4037 | 1178 | size_t max_shrink_words = capacity_until_GC - minimum_desired_capacity; |
coleenp@4037 | 1179 | assert(max_shrink_words >= 0, err_msg("max_shrink_words " SIZE_FORMAT, |
coleenp@4037 | 1180 | max_shrink_words)); |
coleenp@4037 | 1181 | |
coleenp@4037 | 1182 | // Should shrinking be considered? |
coleenp@4037 | 1183 | if (MaxHeapFreeRatio < 100) { |
coleenp@4037 | 1184 | const double maximum_free_percentage = MaxHeapFreeRatio / 100.0; |
coleenp@4037 | 1185 | const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
coleenp@4037 | 1186 | const double max_tmp = used_after_gc / minimum_used_percentage; |
coleenp@4037 | 1187 | size_t maximum_desired_capacity = (size_t)MIN2(max_tmp, double(max_uintx)); |
coleenp@4037 | 1188 | maximum_desired_capacity = MAX2(maximum_desired_capacity, |
coleenp@4037 | 1189 | MetaspaceSize); |
coleenp@4037 | 1190 | if (PrintGC && Verbose) { |
coleenp@4037 | 1191 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1192 | " maximum_free_percentage: %6.2f" |
coleenp@4037 | 1193 | " minimum_used_percentage: %6.2f", |
coleenp@4037 | 1194 | maximum_free_percentage, |
coleenp@4037 | 1195 | minimum_used_percentage); |
coleenp@4037 | 1196 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1197 | " capacity_until_GC: %6.1fK" |
coleenp@4037 | 1198 | " minimum_desired_capacity: %6.1fK" |
coleenp@4037 | 1199 | " maximum_desired_capacity: %6.1fK", |
coleenp@4037 | 1200 | capacity_until_GC / (double) K, |
coleenp@4037 | 1201 | minimum_desired_capacity / (double) K, |
coleenp@4037 | 1202 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1203 | } |
coleenp@4037 | 1204 | |
coleenp@4037 | 1205 | assert(minimum_desired_capacity <= maximum_desired_capacity, |
coleenp@4037 | 1206 | "sanity check"); |
coleenp@4037 | 1207 | |
coleenp@4037 | 1208 | if (capacity_until_GC > maximum_desired_capacity) { |
coleenp@4037 | 1209 | // Capacity too large, compute shrinking size |
coleenp@4037 | 1210 | shrink_words = capacity_until_GC - maximum_desired_capacity; |
coleenp@4037 | 1211 | // We don't want shrink all the way back to initSize if people call |
coleenp@4037 | 1212 | // System.gc(), because some programs do that between "phases" and then |
coleenp@4037 | 1213 | // we'd just have to grow the heap up again for the next phase. So we |
coleenp@4037 | 1214 | // damp the shrinking: 0% on the first call, 10% on the second call, 40% |
coleenp@4037 | 1215 | // on the third call, and 100% by the fourth call. But if we recompute |
coleenp@4037 | 1216 | // size without shrinking, it goes back to 0%. |
coleenp@4037 | 1217 | shrink_words = shrink_words / 100 * current_shrink_factor; |
coleenp@4037 | 1218 | assert(shrink_words <= max_shrink_words, |
coleenp@4037 | 1219 | err_msg("invalid shrink size " SIZE_FORMAT " not <= " SIZE_FORMAT, |
coleenp@4037 | 1220 | shrink_words, max_shrink_words)); |
coleenp@4037 | 1221 | if (current_shrink_factor == 0) { |
coleenp@4037 | 1222 | _shrink_factor = 10; |
coleenp@4037 | 1223 | } else { |
coleenp@4037 | 1224 | _shrink_factor = MIN2(current_shrink_factor * 4, (uint) 100); |
coleenp@4037 | 1225 | } |
coleenp@4037 | 1226 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1227 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1228 | " shrinking:" |
coleenp@4037 | 1229 | " initSize: %.1fK" |
coleenp@4037 | 1230 | " maximum_desired_capacity: %.1fK", |
coleenp@4037 | 1231 | MetaspaceSize / (double) K, |
coleenp@4037 | 1232 | maximum_desired_capacity / (double) K); |
coleenp@4037 | 1233 | gclog_or_tty->print_cr(" " |
coleenp@4037 | 1234 | " shrink_words: %.1fK" |
coleenp@4037 | 1235 | " current_shrink_factor: %d" |
coleenp@4037 | 1236 | " new shrink factor: %d" |
coleenp@4037 | 1237 | " MinMetaspaceExpansion: %.1fK", |
coleenp@4037 | 1238 | shrink_words / (double) K, |
coleenp@4037 | 1239 | current_shrink_factor, |
coleenp@4037 | 1240 | _shrink_factor, |
coleenp@4037 | 1241 | MinMetaspaceExpansion / (double) K); |
coleenp@4037 | 1242 | } |
coleenp@4037 | 1243 | } |
coleenp@4037 | 1244 | } |
coleenp@4037 | 1245 | |
coleenp@4037 | 1246 | |
coleenp@4037 | 1247 | // Don't shrink unless it's significant |
coleenp@4037 | 1248 | if (shrink_words >= MinMetaspaceExpansion) { |
coleenp@4037 | 1249 | VirtualSpaceNode* csp = vsl->current_virtual_space(); |
coleenp@4037 | 1250 | size_t available_to_shrink = csp->capacity_words_in_vs() - |
coleenp@4037 | 1251 | csp->used_words_in_vs(); |
coleenp@4037 | 1252 | shrink_words = MIN2(shrink_words, available_to_shrink); |
coleenp@4037 | 1253 | csp->shrink_by(shrink_words); |
coleenp@4037 | 1254 | MetaspaceGC::dec_capacity_until_GC(shrink_words); |
coleenp@4037 | 1255 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 1256 | size_t new_capacity_until_GC = MetaspaceGC::capacity_until_GC_in_bytes(); |
coleenp@4037 | 1257 | gclog_or_tty->print_cr(" metaspace HWM: %.1fK", new_capacity_until_GC / (double) K); |
coleenp@4037 | 1258 | } |
coleenp@4037 | 1259 | } |
coleenp@4037 | 1260 | assert(vsl->used_bytes_sum() == used_after_gc && |
coleenp@4037 | 1261 | used_after_gc <= vsl->capacity_bytes_sum(), |
coleenp@4037 | 1262 | "sanity check"); |
coleenp@4037 | 1263 | |
coleenp@4037 | 1264 | } |
coleenp@4037 | 1265 | |
coleenp@4037 | 1266 | // Metadebug methods |
coleenp@4037 | 1267 | |
coleenp@4037 | 1268 | void Metadebug::deallocate_chunk_a_lot(SpaceManager* sm, |
coleenp@4037 | 1269 | size_t chunk_word_size){ |
coleenp@4037 | 1270 | #ifdef ASSERT |
coleenp@4037 | 1271 | VirtualSpaceList* vsl = sm->vs_list(); |
coleenp@4037 | 1272 | if (MetaDataDeallocateALot && |
coleenp@4037 | 1273 | Metadebug::deallocate_chunk_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
coleenp@4037 | 1274 | Metadebug::reset_deallocate_chunk_a_lot_count(); |
coleenp@4037 | 1275 | for (uint i = 0; i < metadata_deallocate_a_lock_chunk; i++) { |
coleenp@4037 | 1276 | Metachunk* dummy_chunk = vsl->current_virtual_space()->take_from_committed(chunk_word_size); |
coleenp@4037 | 1277 | if (dummy_chunk == NULL) { |
coleenp@4037 | 1278 | break; |
coleenp@4037 | 1279 | } |
coleenp@4037 | 1280 | vsl->chunk_manager()->chunk_freelist_deallocate(dummy_chunk); |
coleenp@4037 | 1281 | |
coleenp@4037 | 1282 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1283 | gclog_or_tty->print("Metadebug::deallocate_chunk_a_lot: %d) ", |
coleenp@4037 | 1284 | sm->sum_count_in_chunks_in_use()); |
coleenp@4037 | 1285 | dummy_chunk->print_on(gclog_or_tty); |
coleenp@4037 | 1286 | gclog_or_tty->print_cr(" Free chunks total %d count %d", |
coleenp@4037 | 1287 | vsl->chunk_manager()->free_chunks_total(), |
coleenp@4037 | 1288 | vsl->chunk_manager()->free_chunks_count()); |
coleenp@4037 | 1289 | } |
coleenp@4037 | 1290 | } |
coleenp@4037 | 1291 | } else { |
coleenp@4037 | 1292 | Metadebug::inc_deallocate_chunk_a_lot_count(); |
coleenp@4037 | 1293 | } |
coleenp@4037 | 1294 | #endif |
coleenp@4037 | 1295 | } |
coleenp@4037 | 1296 | |
coleenp@4037 | 1297 | void Metadebug::deallocate_block_a_lot(SpaceManager* sm, |
coleenp@4037 | 1298 | size_t raw_word_size){ |
coleenp@4037 | 1299 | #ifdef ASSERT |
coleenp@4037 | 1300 | if (MetaDataDeallocateALot && |
coleenp@4037 | 1301 | Metadebug::deallocate_block_a_lot_count() % MetaDataDeallocateALotInterval == 0 ) { |
coleenp@4037 | 1302 | Metadebug::set_deallocate_block_a_lot_count(0); |
coleenp@4037 | 1303 | for (uint i = 0; i < metadata_deallocate_a_lot_block; i++) { |
jmasa@4196 | 1304 | MetaWord* dummy_block = sm->allocate_work(raw_word_size); |
coleenp@4037 | 1305 | if (dummy_block == 0) { |
coleenp@4037 | 1306 | break; |
coleenp@4037 | 1307 | } |
jmasa@4196 | 1308 | sm->deallocate(dummy_block, raw_word_size); |
coleenp@4037 | 1309 | } |
coleenp@4037 | 1310 | } else { |
coleenp@4037 | 1311 | Metadebug::inc_deallocate_block_a_lot_count(); |
coleenp@4037 | 1312 | } |
coleenp@4037 | 1313 | #endif |
coleenp@4037 | 1314 | } |
coleenp@4037 | 1315 | |
coleenp@4037 | 1316 | void Metadebug::init_allocation_fail_alot_count() { |
coleenp@4037 | 1317 | if (MetadataAllocationFailALot) { |
coleenp@4037 | 1318 | _allocation_fail_alot_count = |
coleenp@4037 | 1319 | 1+(long)((double)MetadataAllocationFailALotInterval*os::random()/(max_jint+1.0)); |
coleenp@4037 | 1320 | } |
coleenp@4037 | 1321 | } |
coleenp@4037 | 1322 | |
coleenp@4037 | 1323 | #ifdef ASSERT |
coleenp@4037 | 1324 | bool Metadebug::test_metadata_failure() { |
coleenp@4037 | 1325 | if (MetadataAllocationFailALot && |
coleenp@4037 | 1326 | Threads::is_vm_complete()) { |
coleenp@4037 | 1327 | if (_allocation_fail_alot_count > 0) { |
coleenp@4037 | 1328 | _allocation_fail_alot_count--; |
coleenp@4037 | 1329 | } else { |
coleenp@4037 | 1330 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1331 | gclog_or_tty->print_cr("Metadata allocation failing for " |
coleenp@4037 | 1332 | "MetadataAllocationFailALot"); |
coleenp@4037 | 1333 | } |
coleenp@4037 | 1334 | init_allocation_fail_alot_count(); |
coleenp@4037 | 1335 | return true; |
coleenp@4037 | 1336 | } |
coleenp@4037 | 1337 | } |
coleenp@4037 | 1338 | return false; |
coleenp@4037 | 1339 | } |
coleenp@4037 | 1340 | #endif |
coleenp@4037 | 1341 | |
coleenp@4037 | 1342 | // ChunkList methods |
coleenp@4037 | 1343 | |
coleenp@4037 | 1344 | size_t ChunkList::sum_list_size() { |
coleenp@4037 | 1345 | size_t result = 0; |
coleenp@4037 | 1346 | Metachunk* cur = head(); |
coleenp@4037 | 1347 | while (cur != NULL) { |
coleenp@4037 | 1348 | result += cur->word_size(); |
coleenp@4037 | 1349 | cur = cur->next(); |
coleenp@4037 | 1350 | } |
coleenp@4037 | 1351 | return result; |
coleenp@4037 | 1352 | } |
coleenp@4037 | 1353 | |
coleenp@4037 | 1354 | size_t ChunkList::sum_list_count() { |
coleenp@4037 | 1355 | size_t result = 0; |
coleenp@4037 | 1356 | Metachunk* cur = head(); |
coleenp@4037 | 1357 | while (cur != NULL) { |
coleenp@4037 | 1358 | result++; |
coleenp@4037 | 1359 | cur = cur->next(); |
coleenp@4037 | 1360 | } |
coleenp@4037 | 1361 | return result; |
coleenp@4037 | 1362 | } |
coleenp@4037 | 1363 | |
coleenp@4037 | 1364 | size_t ChunkList::sum_list_capacity() { |
coleenp@4037 | 1365 | size_t result = 0; |
coleenp@4037 | 1366 | Metachunk* cur = head(); |
coleenp@4037 | 1367 | while (cur != NULL) { |
coleenp@4037 | 1368 | result += cur->capacity_word_size(); |
coleenp@4037 | 1369 | cur = cur->next(); |
coleenp@4037 | 1370 | } |
coleenp@4037 | 1371 | return result; |
coleenp@4037 | 1372 | } |
coleenp@4037 | 1373 | |
coleenp@4037 | 1374 | void ChunkList::add_at_head(Metachunk* head, Metachunk* tail) { |
coleenp@4037 | 1375 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1376 | assert(tail->next() == NULL, "Not the tail"); |
coleenp@4037 | 1377 | |
coleenp@4037 | 1378 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1379 | tty->print("ChunkList::add_at_head: "); |
coleenp@4037 | 1380 | Metachunk* cur = head; |
coleenp@4037 | 1381 | while (cur != NULL) { |
coleenp@4037 | 1382 | tty->print(PTR_FORMAT " (" SIZE_FORMAT ") ", cur, cur->word_size()); |
coleenp@4037 | 1383 | cur = cur->next(); |
coleenp@4037 | 1384 | } |
coleenp@4037 | 1385 | tty->print_cr(""); |
coleenp@4037 | 1386 | } |
coleenp@4037 | 1387 | |
coleenp@4037 | 1388 | if (tail != NULL) { |
coleenp@4037 | 1389 | tail->set_next(_head); |
coleenp@4037 | 1390 | } |
coleenp@4037 | 1391 | set_head(head); |
coleenp@4037 | 1392 | } |
coleenp@4037 | 1393 | |
coleenp@4037 | 1394 | void ChunkList::add_at_head(Metachunk* list) { |
coleenp@4037 | 1395 | if (list == NULL) { |
coleenp@4037 | 1396 | // Nothing to add |
coleenp@4037 | 1397 | return; |
coleenp@4037 | 1398 | } |
coleenp@4037 | 1399 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1400 | Metachunk* head = list; |
coleenp@4037 | 1401 | Metachunk* tail = list; |
coleenp@4037 | 1402 | Metachunk* cur = head->next(); |
coleenp@4037 | 1403 | // Search for the tail since it is not passed. |
coleenp@4037 | 1404 | while (cur != NULL) { |
coleenp@4037 | 1405 | tail = cur; |
coleenp@4037 | 1406 | cur = cur->next(); |
coleenp@4037 | 1407 | } |
coleenp@4037 | 1408 | add_at_head(head, tail); |
coleenp@4037 | 1409 | } |
coleenp@4037 | 1410 | |
coleenp@4037 | 1411 | // ChunkManager methods |
coleenp@4037 | 1412 | |
coleenp@4037 | 1413 | // Verification of _free_chunks_total and _free_chunks_count does not |
coleenp@4037 | 1414 | // work with the CMS collector because its use of additional locks |
coleenp@4037 | 1415 | // complicate the mutex deadlock detection but it can still be useful |
coleenp@4037 | 1416 | // for detecting errors in the chunk accounting with other collectors. |
coleenp@4037 | 1417 | |
coleenp@4037 | 1418 | size_t ChunkManager::free_chunks_total() { |
coleenp@4037 | 1419 | #ifdef ASSERT |
coleenp@4037 | 1420 | if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
coleenp@4037 | 1421 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1422 | Mutex::_no_safepoint_check_flag); |
mgerdin@4264 | 1423 | slow_locked_verify_free_chunks_total(); |
coleenp@4037 | 1424 | } |
coleenp@4037 | 1425 | #endif |
coleenp@4037 | 1426 | return _free_chunks_total; |
coleenp@4037 | 1427 | } |
coleenp@4037 | 1428 | |
coleenp@4037 | 1429 | size_t ChunkManager::free_chunks_total_in_bytes() { |
coleenp@4037 | 1430 | return free_chunks_total() * BytesPerWord; |
coleenp@4037 | 1431 | } |
coleenp@4037 | 1432 | |
coleenp@4037 | 1433 | size_t ChunkManager::free_chunks_count() { |
coleenp@4037 | 1434 | #ifdef ASSERT |
coleenp@4037 | 1435 | if (!UseConcMarkSweepGC && !SpaceManager::expand_lock()->is_locked()) { |
coleenp@4037 | 1436 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1437 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1438 | // This lock is only needed in debug because the verification |
coleenp@4037 | 1439 | // of the _free_chunks_totals walks the list of free chunks |
mgerdin@4264 | 1440 | slow_locked_verify_free_chunks_count(); |
coleenp@4037 | 1441 | } |
coleenp@4037 | 1442 | #endif |
mgerdin@4264 | 1443 | return _free_chunks_count; |
coleenp@4037 | 1444 | } |
coleenp@4037 | 1445 | |
coleenp@4037 | 1446 | void ChunkManager::locked_verify_free_chunks_total() { |
coleenp@4037 | 1447 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1448 | assert(sum_free_chunks() == _free_chunks_total, |
coleenp@4037 | 1449 | err_msg("_free_chunks_total " SIZE_FORMAT " is not the" |
coleenp@4037 | 1450 | " same as sum " SIZE_FORMAT, _free_chunks_total, |
coleenp@4037 | 1451 | sum_free_chunks())); |
coleenp@4037 | 1452 | } |
coleenp@4037 | 1453 | |
coleenp@4037 | 1454 | void ChunkManager::verify_free_chunks_total() { |
coleenp@4037 | 1455 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1456 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1457 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1458 | } |
coleenp@4037 | 1459 | |
coleenp@4037 | 1460 | void ChunkManager::locked_verify_free_chunks_count() { |
coleenp@4037 | 1461 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1462 | assert(sum_free_chunks_count() == _free_chunks_count, |
coleenp@4037 | 1463 | err_msg("_free_chunks_count " SIZE_FORMAT " is not the" |
coleenp@4037 | 1464 | " same as sum " SIZE_FORMAT, _free_chunks_count, |
coleenp@4037 | 1465 | sum_free_chunks_count())); |
coleenp@4037 | 1466 | } |
coleenp@4037 | 1467 | |
coleenp@4037 | 1468 | void ChunkManager::verify_free_chunks_count() { |
coleenp@4037 | 1469 | #ifdef ASSERT |
coleenp@4037 | 1470 | MutexLockerEx cl(SpaceManager::expand_lock(), |
coleenp@4037 | 1471 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1472 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1473 | #endif |
coleenp@4037 | 1474 | } |
coleenp@4037 | 1475 | |
coleenp@4037 | 1476 | void ChunkManager::verify() { |
mgerdin@4264 | 1477 | MutexLockerEx cl(SpaceManager::expand_lock(), |
mgerdin@4264 | 1478 | Mutex::_no_safepoint_check_flag); |
mgerdin@4264 | 1479 | locked_verify(); |
coleenp@4037 | 1480 | } |
coleenp@4037 | 1481 | |
coleenp@4037 | 1482 | void ChunkManager::locked_verify() { |
jmasa@4196 | 1483 | locked_verify_free_chunks_count(); |
coleenp@4037 | 1484 | locked_verify_free_chunks_total(); |
coleenp@4037 | 1485 | } |
coleenp@4037 | 1486 | |
coleenp@4037 | 1487 | void ChunkManager::locked_print_free_chunks(outputStream* st) { |
coleenp@4037 | 1488 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1489 | st->print_cr("Free chunk total 0x%x count 0x%x", |
coleenp@4037 | 1490 | _free_chunks_total, _free_chunks_count); |
coleenp@4037 | 1491 | } |
coleenp@4037 | 1492 | |
coleenp@4037 | 1493 | void ChunkManager::locked_print_sum_free_chunks(outputStream* st) { |
coleenp@4037 | 1494 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1495 | st->print_cr("Sum free chunk total 0x%x count 0x%x", |
coleenp@4037 | 1496 | sum_free_chunks(), sum_free_chunks_count()); |
coleenp@4037 | 1497 | } |
coleenp@4037 | 1498 | ChunkList* ChunkManager::free_chunks(ChunkIndex index) { |
coleenp@4037 | 1499 | return &_free_chunks[index]; |
coleenp@4037 | 1500 | } |
coleenp@4037 | 1501 | |
coleenp@4037 | 1502 | // These methods that sum the free chunk lists are used in printing |
coleenp@4037 | 1503 | // methods that are used in product builds. |
coleenp@4037 | 1504 | size_t ChunkManager::sum_free_chunks() { |
coleenp@4037 | 1505 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1506 | size_t result = 0; |
coleenp@4037 | 1507 | for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1508 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1509 | |
coleenp@4037 | 1510 | if (list == NULL) { |
coleenp@4037 | 1511 | continue; |
coleenp@4037 | 1512 | } |
coleenp@4037 | 1513 | |
coleenp@4037 | 1514 | result = result + list->sum_list_capacity(); |
coleenp@4037 | 1515 | } |
jmasa@4196 | 1516 | result = result + humongous_dictionary()->total_size(); |
coleenp@4037 | 1517 | return result; |
coleenp@4037 | 1518 | } |
coleenp@4037 | 1519 | |
coleenp@4037 | 1520 | size_t ChunkManager::sum_free_chunks_count() { |
coleenp@4037 | 1521 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1522 | size_t count = 0; |
coleenp@4037 | 1523 | for (ChunkIndex i = SmallIndex; i < NumberOfFreeLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1524 | ChunkList* list = free_chunks(i); |
coleenp@4037 | 1525 | if (list == NULL) { |
coleenp@4037 | 1526 | continue; |
coleenp@4037 | 1527 | } |
coleenp@4037 | 1528 | count = count + list->sum_list_count(); |
coleenp@4037 | 1529 | } |
jmasa@4196 | 1530 | count = count + humongous_dictionary()->total_free_blocks(); |
coleenp@4037 | 1531 | return count; |
coleenp@4037 | 1532 | } |
coleenp@4037 | 1533 | |
coleenp@4037 | 1534 | ChunkList* ChunkManager::find_free_chunks_list(size_t word_size) { |
coleenp@4037 | 1535 | switch (word_size) { |
coleenp@4037 | 1536 | case SpaceManager::SmallChunk : |
coleenp@4037 | 1537 | return &_free_chunks[0]; |
coleenp@4037 | 1538 | case SpaceManager::MediumChunk : |
coleenp@4037 | 1539 | return &_free_chunks[1]; |
coleenp@4037 | 1540 | default: |
coleenp@4037 | 1541 | assert(word_size > SpaceManager::MediumChunk, "List inconsistency"); |
coleenp@4037 | 1542 | return &_free_chunks[2]; |
coleenp@4037 | 1543 | } |
coleenp@4037 | 1544 | } |
coleenp@4037 | 1545 | |
coleenp@4037 | 1546 | void ChunkManager::free_chunks_put(Metachunk* chunk) { |
coleenp@4037 | 1547 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1548 | ChunkList* free_list = find_free_chunks_list(chunk->word_size()); |
coleenp@4037 | 1549 | chunk->set_next(free_list->head()); |
coleenp@4037 | 1550 | free_list->set_head(chunk); |
coleenp@4037 | 1551 | // chunk is being returned to the chunk free list |
coleenp@4037 | 1552 | inc_free_chunks_total(chunk->capacity_word_size()); |
mgerdin@4264 | 1553 | slow_locked_verify(); |
coleenp@4037 | 1554 | } |
coleenp@4037 | 1555 | |
coleenp@4037 | 1556 | void ChunkManager::chunk_freelist_deallocate(Metachunk* chunk) { |
coleenp@4037 | 1557 | // The deallocation of a chunk originates in the freelist |
coleenp@4037 | 1558 | // manangement code for a Metaspace and does not hold the |
coleenp@4037 | 1559 | // lock. |
coleenp@4037 | 1560 | assert(chunk != NULL, "Deallocating NULL"); |
mgerdin@4264 | 1561 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@4264 | 1562 | slow_locked_verify(); |
coleenp@4037 | 1563 | if (TraceMetadataChunkAllocation) { |
coleenp@4037 | 1564 | tty->print_cr("ChunkManager::chunk_freelist_deallocate: chunk " |
coleenp@4037 | 1565 | PTR_FORMAT " size " SIZE_FORMAT, |
coleenp@4037 | 1566 | chunk, chunk->word_size()); |
coleenp@4037 | 1567 | } |
coleenp@4037 | 1568 | free_chunks_put(chunk); |
coleenp@4037 | 1569 | } |
coleenp@4037 | 1570 | |
coleenp@4037 | 1571 | Metachunk* ChunkManager::free_chunks_get(size_t word_size) { |
coleenp@4037 | 1572 | assert_lock_strong(SpaceManager::expand_lock()); |
coleenp@4037 | 1573 | |
mgerdin@4264 | 1574 | slow_locked_verify(); |
jmasa@4196 | 1575 | |
jmasa@4196 | 1576 | Metachunk* chunk = NULL; |
jmasa@4196 | 1577 | if (!SpaceManager::is_humongous(word_size)) { |
jmasa@4196 | 1578 | ChunkList* free_list = find_free_chunks_list(word_size); |
jmasa@4196 | 1579 | assert(free_list != NULL, "Sanity check"); |
jmasa@4196 | 1580 | |
jmasa@4196 | 1581 | chunk = free_list->head(); |
jmasa@4196 | 1582 | debug_only(Metachunk* debug_head = chunk;) |
jmasa@4196 | 1583 | |
jmasa@4196 | 1584 | if (chunk == NULL) { |
jmasa@4196 | 1585 | return NULL; |
jmasa@4196 | 1586 | } |
jmasa@4196 | 1587 | |
coleenp@4037 | 1588 | // Remove the chunk as the head of the list. |
coleenp@4037 | 1589 | free_list->set_head(chunk->next()); |
coleenp@4037 | 1590 | chunk->set_next(NULL); |
jmasa@4196 | 1591 | // Chunk has been removed from the chunks free list. |
jmasa@4196 | 1592 | dec_free_chunks_total(chunk->capacity_word_size()); |
coleenp@4037 | 1593 | |
coleenp@4037 | 1594 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1595 | tty->print_cr("ChunkManager::free_chunks_get: free_list " |
coleenp@4037 | 1596 | PTR_FORMAT " head " PTR_FORMAT " size " SIZE_FORMAT, |
coleenp@4037 | 1597 | free_list, chunk, chunk->word_size()); |
coleenp@4037 | 1598 | } |
coleenp@4037 | 1599 | } else { |
jmasa@4196 | 1600 | chunk = humongous_dictionary()->get_chunk( |
jmasa@4196 | 1601 | word_size, |
jmasa@4196 | 1602 | FreeBlockDictionary<Metachunk>::atLeast); |
jmasa@4196 | 1603 | |
jmasa@4196 | 1604 | if (chunk != NULL) { |
jmasa@4196 | 1605 | if (TraceMetadataHumongousAllocation) { |
jmasa@4196 | 1606 | size_t waste = chunk->word_size() - word_size; |
jmasa@4196 | 1607 | tty->print_cr("Free list allocate humongous chunk size " SIZE_FORMAT |
jmasa@4196 | 1608 | " for requested size " SIZE_FORMAT |
jmasa@4196 | 1609 | " waste " SIZE_FORMAT, |
jmasa@4196 | 1610 | chunk->word_size(), word_size, waste); |
coleenp@4037 | 1611 | } |
jmasa@4196 | 1612 | // Chunk is being removed from the chunks free list. |
jmasa@4196 | 1613 | dec_free_chunks_total(chunk->capacity_word_size()); |
jmasa@4196 | 1614 | #ifdef ASSERT |
jmasa@4196 | 1615 | chunk->set_is_free(false); |
jmasa@4196 | 1616 | #endif |
coleenp@4037 | 1617 | } |
coleenp@4037 | 1618 | } |
mgerdin@4264 | 1619 | slow_locked_verify(); |
coleenp@4037 | 1620 | return chunk; |
coleenp@4037 | 1621 | } |
coleenp@4037 | 1622 | |
coleenp@4037 | 1623 | Metachunk* ChunkManager::chunk_freelist_allocate(size_t word_size) { |
coleenp@4037 | 1624 | assert_lock_strong(SpaceManager::expand_lock()); |
mgerdin@4264 | 1625 | slow_locked_verify(); |
coleenp@4037 | 1626 | |
coleenp@4037 | 1627 | // Take from the beginning of the list |
coleenp@4037 | 1628 | Metachunk* chunk = free_chunks_get(word_size); |
coleenp@4037 | 1629 | if (chunk == NULL) { |
coleenp@4037 | 1630 | return NULL; |
coleenp@4037 | 1631 | } |
coleenp@4037 | 1632 | |
coleenp@4037 | 1633 | assert(word_size <= chunk->word_size() || |
coleenp@4037 | 1634 | SpaceManager::is_humongous(chunk->word_size()), |
coleenp@4037 | 1635 | "Non-humongous variable sized chunk"); |
coleenp@4037 | 1636 | if (TraceMetadataChunkAllocation) { |
coleenp@4037 | 1637 | tty->print("ChunkManager::chunk_freelist_allocate: chunk " |
coleenp@4037 | 1638 | PTR_FORMAT " size " SIZE_FORMAT " ", |
coleenp@4037 | 1639 | chunk, chunk->word_size()); |
coleenp@4037 | 1640 | locked_print_free_chunks(tty); |
coleenp@4037 | 1641 | } |
coleenp@4037 | 1642 | |
coleenp@4037 | 1643 | return chunk; |
coleenp@4037 | 1644 | } |
coleenp@4037 | 1645 | |
jmasa@4196 | 1646 | void ChunkManager::print_on(outputStream* out) { |
jmasa@4196 | 1647 | if (PrintFLSStatistics != 0) { |
jmasa@4196 | 1648 | humongous_dictionary()->report_statistics(); |
jmasa@4196 | 1649 | } |
jmasa@4196 | 1650 | } |
jmasa@4196 | 1651 | |
coleenp@4037 | 1652 | // SpaceManager methods |
coleenp@4037 | 1653 | |
coleenp@4037 | 1654 | size_t SpaceManager::sum_free_in_chunks_in_use() const { |
coleenp@4037 | 1655 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1656 | size_t free = 0; |
jmasa@4196 | 1657 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1658 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1659 | while (chunk != NULL) { |
coleenp@4037 | 1660 | free += chunk->free_word_size(); |
coleenp@4037 | 1661 | chunk = chunk->next(); |
coleenp@4037 | 1662 | } |
coleenp@4037 | 1663 | } |
coleenp@4037 | 1664 | return free; |
coleenp@4037 | 1665 | } |
coleenp@4037 | 1666 | |
coleenp@4037 | 1667 | size_t SpaceManager::sum_waste_in_chunks_in_use() const { |
coleenp@4037 | 1668 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1669 | size_t result = 0; |
jmasa@4196 | 1670 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
jmasa@4196 | 1671 | |
jmasa@4196 | 1672 | |
coleenp@4037 | 1673 | result += sum_waste_in_chunks_in_use(i); |
coleenp@4037 | 1674 | } |
jmasa@4196 | 1675 | |
coleenp@4037 | 1676 | return result; |
coleenp@4037 | 1677 | } |
coleenp@4037 | 1678 | |
coleenp@4037 | 1679 | size_t SpaceManager::sum_waste_in_chunks_in_use(ChunkIndex index) const { |
coleenp@4037 | 1680 | size_t result = 0; |
coleenp@4037 | 1681 | size_t count = 0; |
coleenp@4037 | 1682 | Metachunk* chunk = chunks_in_use(index); |
coleenp@4037 | 1683 | // Count the free space in all the chunk but not the |
coleenp@4037 | 1684 | // current chunk from which allocations are still being done. |
coleenp@4037 | 1685 | if (chunk != NULL) { |
jmasa@4196 | 1686 | Metachunk* prev = chunk; |
jmasa@4196 | 1687 | while (chunk != NULL && chunk != current_chunk()) { |
jmasa@4196 | 1688 | result += chunk->free_word_size(); |
jmasa@4196 | 1689 | prev = chunk; |
coleenp@4037 | 1690 | chunk = chunk->next(); |
coleenp@4037 | 1691 | count++; |
coleenp@4037 | 1692 | } |
coleenp@4037 | 1693 | } |
coleenp@4037 | 1694 | return result; |
coleenp@4037 | 1695 | } |
coleenp@4037 | 1696 | |
coleenp@4037 | 1697 | size_t SpaceManager::sum_capacity_in_chunks_in_use() const { |
coleenp@4037 | 1698 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1699 | size_t sum = 0; |
jmasa@4196 | 1700 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1701 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1702 | while (chunk != NULL) { |
coleenp@4037 | 1703 | // Just changed this sum += chunk->capacity_word_size(); |
coleenp@4037 | 1704 | // sum += chunk->word_size() - Metachunk::overhead(); |
coleenp@4037 | 1705 | sum += chunk->capacity_word_size(); |
coleenp@4037 | 1706 | chunk = chunk->next(); |
coleenp@4037 | 1707 | } |
coleenp@4037 | 1708 | } |
coleenp@4037 | 1709 | return sum; |
coleenp@4037 | 1710 | } |
coleenp@4037 | 1711 | |
coleenp@4037 | 1712 | size_t SpaceManager::sum_count_in_chunks_in_use() { |
coleenp@4037 | 1713 | size_t count = 0; |
jmasa@4196 | 1714 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1715 | count = count + sum_count_in_chunks_in_use(i); |
coleenp@4037 | 1716 | } |
jmasa@4196 | 1717 | |
coleenp@4037 | 1718 | return count; |
coleenp@4037 | 1719 | } |
coleenp@4037 | 1720 | |
coleenp@4037 | 1721 | size_t SpaceManager::sum_count_in_chunks_in_use(ChunkIndex i) { |
coleenp@4037 | 1722 | size_t count = 0; |
coleenp@4037 | 1723 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1724 | while (chunk != NULL) { |
coleenp@4037 | 1725 | count++; |
coleenp@4037 | 1726 | chunk = chunk->next(); |
coleenp@4037 | 1727 | } |
coleenp@4037 | 1728 | return count; |
coleenp@4037 | 1729 | } |
coleenp@4037 | 1730 | |
coleenp@4037 | 1731 | |
coleenp@4037 | 1732 | size_t SpaceManager::sum_used_in_chunks_in_use() const { |
coleenp@4037 | 1733 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1734 | size_t used = 0; |
jmasa@4196 | 1735 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1736 | Metachunk* chunk = chunks_in_use(i); |
coleenp@4037 | 1737 | while (chunk != NULL) { |
coleenp@4037 | 1738 | used += chunk->used_word_size(); |
coleenp@4037 | 1739 | chunk = chunk->next(); |
coleenp@4037 | 1740 | } |
coleenp@4037 | 1741 | } |
coleenp@4037 | 1742 | return used; |
coleenp@4037 | 1743 | } |
coleenp@4037 | 1744 | |
coleenp@4037 | 1745 | void SpaceManager::locked_print_chunks_in_use_on(outputStream* st) const { |
coleenp@4037 | 1746 | |
coleenp@4037 | 1747 | Metachunk* small_chunk = chunks_in_use(SmallIndex); |
coleenp@4037 | 1748 | st->print_cr("SpaceManager: small chunk " PTR_FORMAT |
coleenp@4037 | 1749 | " free " SIZE_FORMAT, |
coleenp@4037 | 1750 | small_chunk, |
coleenp@4037 | 1751 | small_chunk->free_word_size()); |
coleenp@4037 | 1752 | |
coleenp@4037 | 1753 | Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
coleenp@4037 | 1754 | st->print("medium chunk " PTR_FORMAT, medium_chunk); |
coleenp@4037 | 1755 | Metachunk* tail = current_chunk(); |
coleenp@4037 | 1756 | st->print_cr(" current chunk " PTR_FORMAT, tail); |
coleenp@4037 | 1757 | |
coleenp@4037 | 1758 | Metachunk* head = chunks_in_use(HumongousIndex); |
coleenp@4037 | 1759 | st->print_cr("humongous chunk " PTR_FORMAT, head); |
coleenp@4037 | 1760 | |
coleenp@4037 | 1761 | vs_list()->chunk_manager()->locked_print_free_chunks(st); |
coleenp@4037 | 1762 | vs_list()->chunk_manager()->locked_print_sum_free_chunks(st); |
coleenp@4037 | 1763 | } |
coleenp@4037 | 1764 | |
coleenp@4037 | 1765 | size_t SpaceManager::calc_chunk_size(size_t word_size) { |
coleenp@4037 | 1766 | |
coleenp@4037 | 1767 | // Decide between a small chunk and a medium chunk. Up to |
coleenp@4037 | 1768 | // _small_chunk_limit small chunks can be allocated but |
coleenp@4037 | 1769 | // once a medium chunk has been allocated, no more small |
coleenp@4037 | 1770 | // chunks will be allocated. |
coleenp@4037 | 1771 | size_t chunk_word_size; |
coleenp@4037 | 1772 | if (chunks_in_use(MediumIndex) == NULL && |
coleenp@4037 | 1773 | (!has_small_chunk_limit() || |
coleenp@4037 | 1774 | sum_count_in_chunks_in_use(SmallIndex) < _small_chunk_limit)) { |
coleenp@4037 | 1775 | chunk_word_size = (size_t) SpaceManager::SmallChunk; |
coleenp@4037 | 1776 | if (word_size + Metachunk::overhead() > SpaceManager::SmallChunk) { |
coleenp@4037 | 1777 | chunk_word_size = MediumChunk; |
coleenp@4037 | 1778 | } |
coleenp@4037 | 1779 | } else { |
coleenp@4037 | 1780 | chunk_word_size = MediumChunk; |
coleenp@4037 | 1781 | } |
coleenp@4037 | 1782 | |
coleenp@4037 | 1783 | // Might still need a humongous chunk |
coleenp@4037 | 1784 | chunk_word_size = |
coleenp@4037 | 1785 | MAX2((size_t) chunk_word_size, word_size + Metachunk::overhead()); |
coleenp@4037 | 1786 | |
coleenp@4037 | 1787 | if (TraceMetadataHumongousAllocation && |
coleenp@4037 | 1788 | SpaceManager::is_humongous(word_size)) { |
coleenp@4037 | 1789 | gclog_or_tty->print_cr("Metadata humongous allocation:"); |
coleenp@4037 | 1790 | gclog_or_tty->print_cr(" word_size " PTR_FORMAT, word_size); |
coleenp@4037 | 1791 | gclog_or_tty->print_cr(" chunk_word_size " PTR_FORMAT, |
coleenp@4037 | 1792 | chunk_word_size); |
jmasa@4196 | 1793 | gclog_or_tty->print_cr(" chunk overhead " PTR_FORMAT, |
coleenp@4037 | 1794 | Metachunk::overhead()); |
coleenp@4037 | 1795 | } |
coleenp@4037 | 1796 | return chunk_word_size; |
coleenp@4037 | 1797 | } |
coleenp@4037 | 1798 | |
jmasa@4196 | 1799 | MetaWord* SpaceManager::grow_and_allocate(size_t word_size) { |
coleenp@4037 | 1800 | assert(vs_list()->current_virtual_space() != NULL, |
coleenp@4037 | 1801 | "Should have been set"); |
coleenp@4037 | 1802 | assert(current_chunk() == NULL || |
coleenp@4037 | 1803 | current_chunk()->allocate(word_size) == NULL, |
coleenp@4037 | 1804 | "Don't need to expand"); |
coleenp@4037 | 1805 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1806 | |
coleenp@4037 | 1807 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1808 | gclog_or_tty->print_cr("SpaceManager::grow_and_allocate for " SIZE_FORMAT |
coleenp@4037 | 1809 | " words " SIZE_FORMAT " space left", |
coleenp@4037 | 1810 | word_size, current_chunk() != NULL ? |
coleenp@4037 | 1811 | current_chunk()->free_word_size() : 0); |
coleenp@4037 | 1812 | } |
coleenp@4037 | 1813 | |
coleenp@4037 | 1814 | // Get another chunk out of the virtual space |
coleenp@4037 | 1815 | size_t grow_chunks_by_words = calc_chunk_size(word_size); |
coleenp@4037 | 1816 | Metachunk* next = vs_list()->get_new_chunk(word_size, grow_chunks_by_words); |
coleenp@4037 | 1817 | |
coleenp@4037 | 1818 | // If a chunk was available, add it to the in-use chunk list |
coleenp@4037 | 1819 | // and do an allocation from it. |
coleenp@4037 | 1820 | if (next != NULL) { |
coleenp@4037 | 1821 | Metadebug::deallocate_chunk_a_lot(this, grow_chunks_by_words); |
coleenp@4037 | 1822 | // Add to this manager's list of chunks in use. |
coleenp@4037 | 1823 | add_chunk(next, false); |
coleenp@4037 | 1824 | return next->allocate(word_size); |
coleenp@4037 | 1825 | } |
coleenp@4037 | 1826 | return NULL; |
coleenp@4037 | 1827 | } |
coleenp@4037 | 1828 | |
coleenp@4037 | 1829 | void SpaceManager::print_on(outputStream* st) const { |
coleenp@4037 | 1830 | |
coleenp@4037 | 1831 | for (ChunkIndex i = SmallIndex; |
jmasa@4196 | 1832 | i < NumberOfInUseLists ; |
coleenp@4037 | 1833 | i = next_chunk_index(i) ) { |
coleenp@4037 | 1834 | st->print_cr(" chunks_in_use " PTR_FORMAT " chunk size " PTR_FORMAT, |
coleenp@4037 | 1835 | chunks_in_use(i), |
coleenp@4037 | 1836 | chunks_in_use(i) == NULL ? 0 : chunks_in_use(i)->word_size()); |
coleenp@4037 | 1837 | } |
coleenp@4037 | 1838 | st->print_cr(" waste: Small " SIZE_FORMAT " Medium " SIZE_FORMAT |
coleenp@4037 | 1839 | " Humongous " SIZE_FORMAT, |
coleenp@4037 | 1840 | sum_waste_in_chunks_in_use(SmallIndex), |
coleenp@4037 | 1841 | sum_waste_in_chunks_in_use(MediumIndex), |
coleenp@4037 | 1842 | sum_waste_in_chunks_in_use(HumongousIndex)); |
jmasa@4196 | 1843 | // block free lists |
jmasa@4196 | 1844 | if (block_freelists() != NULL) { |
jmasa@4196 | 1845 | st->print_cr("total in block free lists " SIZE_FORMAT, |
jmasa@4196 | 1846 | block_freelists()->total_size()); |
jmasa@4196 | 1847 | } |
coleenp@4037 | 1848 | } |
coleenp@4037 | 1849 | |
coleenp@4037 | 1850 | SpaceManager::SpaceManager(Mutex* lock, VirtualSpaceList* vs_list) : |
coleenp@4037 | 1851 | _vs_list(vs_list), |
coleenp@4037 | 1852 | _allocation_total(0), |
coleenp@4037 | 1853 | _lock(lock) { |
coleenp@4037 | 1854 | Metadebug::init_allocation_fail_alot_count(); |
jmasa@4196 | 1855 | for (ChunkIndex i = SmallIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 1856 | _chunks_in_use[i] = NULL; |
coleenp@4037 | 1857 | } |
coleenp@4037 | 1858 | _current_chunk = NULL; |
coleenp@4037 | 1859 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1860 | gclog_or_tty->print_cr("SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 1861 | } |
coleenp@4037 | 1862 | } |
coleenp@4037 | 1863 | |
coleenp@4037 | 1864 | SpaceManager::~SpaceManager() { |
coleenp@4037 | 1865 | MutexLockerEx fcl(SpaceManager::expand_lock(), |
coleenp@4037 | 1866 | Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 1867 | |
coleenp@4037 | 1868 | ChunkManager* chunk_manager = vs_list()->chunk_manager(); |
coleenp@4037 | 1869 | |
mgerdin@4264 | 1870 | chunk_manager->slow_locked_verify(); |
coleenp@4037 | 1871 | |
coleenp@4037 | 1872 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 1873 | gclog_or_tty->print_cr("~SpaceManager(): " PTR_FORMAT, this); |
coleenp@4037 | 1874 | locked_print_chunks_in_use_on(gclog_or_tty); |
coleenp@4037 | 1875 | } |
coleenp@4037 | 1876 | |
coleenp@4304 | 1877 | // Mangle freed memory. |
coleenp@4304 | 1878 | NOT_PRODUCT(mangle_freed_chunks();) |
coleenp@4304 | 1879 | |
coleenp@4037 | 1880 | // Have to update before the chunks_in_use lists are emptied |
coleenp@4037 | 1881 | // below. |
coleenp@4037 | 1882 | chunk_manager->inc_free_chunks_total(sum_capacity_in_chunks_in_use(), |
coleenp@4037 | 1883 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 1884 | |
coleenp@4037 | 1885 | // Add all the chunks in use by this space manager |
coleenp@4037 | 1886 | // to the global list of free chunks. |
coleenp@4037 | 1887 | |
coleenp@4037 | 1888 | // Small chunks. There is one _current_chunk for each |
coleenp@4037 | 1889 | // Metaspace. It could point to a small or medium chunk. |
coleenp@4037 | 1890 | // Rather than determine which it is, follow the list of |
coleenp@4037 | 1891 | // small chunks to add them to the free list |
coleenp@4037 | 1892 | Metachunk* small_chunk = chunks_in_use(SmallIndex); |
coleenp@4037 | 1893 | chunk_manager->free_small_chunks()->add_at_head(small_chunk); |
coleenp@4037 | 1894 | set_chunks_in_use(SmallIndex, NULL); |
coleenp@4037 | 1895 | |
coleenp@4037 | 1896 | // After the small chunk are the medium chunks |
coleenp@4037 | 1897 | Metachunk* medium_chunk = chunks_in_use(MediumIndex); |
coleenp@4037 | 1898 | assert(medium_chunk == NULL || |
coleenp@4037 | 1899 | medium_chunk->word_size() == MediumChunk, |
coleenp@4037 | 1900 | "Chunk is on the wrong list"); |
coleenp@4037 | 1901 | |
coleenp@4037 | 1902 | if (medium_chunk != NULL) { |
coleenp@4037 | 1903 | Metachunk* head = medium_chunk; |
coleenp@4037 | 1904 | // If there is a medium chunk then the _current_chunk can only |
coleenp@4037 | 1905 | // point to the last medium chunk. |
coleenp@4037 | 1906 | Metachunk* tail = current_chunk(); |
coleenp@4037 | 1907 | chunk_manager->free_medium_chunks()->add_at_head(head, tail); |
coleenp@4037 | 1908 | set_chunks_in_use(MediumIndex, NULL); |
coleenp@4037 | 1909 | } |
coleenp@4037 | 1910 | |
coleenp@4037 | 1911 | // Humongous chunks |
coleenp@4037 | 1912 | // Humongous chunks are never the current chunk. |
coleenp@4037 | 1913 | Metachunk* humongous_chunks = chunks_in_use(HumongousIndex); |
coleenp@4037 | 1914 | |
jmasa@4196 | 1915 | while (humongous_chunks != NULL) { |
jmasa@4196 | 1916 | #ifdef ASSERT |
jmasa@4196 | 1917 | humongous_chunks->set_is_free(true); |
jmasa@4196 | 1918 | #endif |
jmasa@4196 | 1919 | Metachunk* next_humongous_chunks = humongous_chunks->next(); |
jmasa@4196 | 1920 | chunk_manager->humongous_dictionary()->return_chunk(humongous_chunks); |
jmasa@4196 | 1921 | humongous_chunks = next_humongous_chunks; |
coleenp@4037 | 1922 | } |
jmasa@4196 | 1923 | set_chunks_in_use(HumongousIndex, NULL); |
mgerdin@4264 | 1924 | chunk_manager->slow_locked_verify(); |
coleenp@4037 | 1925 | } |
coleenp@4037 | 1926 | |
jmasa@4196 | 1927 | void SpaceManager::deallocate(MetaWord* p, size_t word_size) { |
coleenp@4037 | 1928 | assert_lock_strong(_lock); |
jmasa@4196 | 1929 | size_t min_size = TreeChunk<Metablock, FreeList>::min_size(); |
jmasa@4196 | 1930 | assert(word_size >= min_size, |
jmasa@4196 | 1931 | err_msg("Should not deallocate dark matter " SIZE_FORMAT, word_size)); |
jmasa@4196 | 1932 | block_freelists()->return_block(p, word_size); |
coleenp@4037 | 1933 | } |
coleenp@4037 | 1934 | |
coleenp@4037 | 1935 | // Adds a chunk to the list of chunks in use. |
coleenp@4037 | 1936 | void SpaceManager::add_chunk(Metachunk* new_chunk, bool make_current) { |
coleenp@4037 | 1937 | |
coleenp@4037 | 1938 | assert(new_chunk != NULL, "Should not be NULL"); |
coleenp@4037 | 1939 | assert(new_chunk->next() == NULL, "Should not be on a list"); |
coleenp@4037 | 1940 | |
coleenp@4037 | 1941 | new_chunk->reset_empty(); |
coleenp@4037 | 1942 | |
coleenp@4037 | 1943 | // Find the correct list and and set the current |
coleenp@4037 | 1944 | // chunk for that list. |
coleenp@4037 | 1945 | switch (new_chunk->word_size()) { |
coleenp@4037 | 1946 | case SpaceManager::SmallChunk : |
coleenp@4037 | 1947 | if (chunks_in_use(SmallIndex) == NULL) { |
coleenp@4037 | 1948 | // First chunk to add to the list |
coleenp@4037 | 1949 | set_chunks_in_use(SmallIndex, new_chunk); |
coleenp@4037 | 1950 | } else { |
coleenp@4037 | 1951 | assert(current_chunk()->word_size() == SpaceManager::SmallChunk, |
coleenp@4037 | 1952 | err_msg( "Incorrect mix of sizes in chunk list " |
coleenp@4037 | 1953 | SIZE_FORMAT " new chunk " SIZE_FORMAT, |
coleenp@4037 | 1954 | current_chunk()->word_size(), new_chunk->word_size())); |
coleenp@4037 | 1955 | current_chunk()->set_next(new_chunk); |
coleenp@4037 | 1956 | } |
coleenp@4037 | 1957 | // Make current chunk |
coleenp@4037 | 1958 | set_current_chunk(new_chunk); |
coleenp@4037 | 1959 | break; |
coleenp@4037 | 1960 | case SpaceManager::MediumChunk : |
coleenp@4037 | 1961 | if (chunks_in_use(MediumIndex) == NULL) { |
coleenp@4037 | 1962 | // About to add the first medium chunk so teminate the |
coleenp@4037 | 1963 | // small chunk list. In general once medium chunks are |
coleenp@4037 | 1964 | // being added, we're past the need for small chunks. |
coleenp@4037 | 1965 | if (current_chunk() != NULL) { |
coleenp@4037 | 1966 | // Only a small chunk or the initial chunk could be |
coleenp@4037 | 1967 | // the current chunk if this is the first medium chunk. |
coleenp@4037 | 1968 | assert(current_chunk()->word_size() == SpaceManager::SmallChunk || |
coleenp@4037 | 1969 | chunks_in_use(SmallIndex) == NULL, |
coleenp@4037 | 1970 | err_msg("Should be a small chunk or initial chunk, current chunk " |
coleenp@4037 | 1971 | SIZE_FORMAT " new chunk " SIZE_FORMAT, |
coleenp@4037 | 1972 | current_chunk()->word_size(), new_chunk->word_size())); |
coleenp@4037 | 1973 | current_chunk()->set_next(NULL); |
coleenp@4037 | 1974 | } |
coleenp@4037 | 1975 | // First chunk to add to the list |
coleenp@4037 | 1976 | set_chunks_in_use(MediumIndex, new_chunk); |
coleenp@4037 | 1977 | |
coleenp@4037 | 1978 | } else { |
coleenp@4037 | 1979 | // As a minimum the first medium chunk added would |
coleenp@4037 | 1980 | // have become the _current_chunk |
coleenp@4037 | 1981 | // so the _current_chunk has to be non-NULL here |
coleenp@4037 | 1982 | // (although not necessarily still the first medium chunk). |
coleenp@4037 | 1983 | assert(current_chunk()->word_size() == SpaceManager::MediumChunk, |
coleenp@4037 | 1984 | "A medium chunk should the current chunk"); |
coleenp@4037 | 1985 | current_chunk()->set_next(new_chunk); |
coleenp@4037 | 1986 | } |
coleenp@4037 | 1987 | // Make current chunk |
coleenp@4037 | 1988 | set_current_chunk(new_chunk); |
coleenp@4037 | 1989 | break; |
coleenp@4037 | 1990 | default: { |
coleenp@4037 | 1991 | // For null class loader data and DumpSharedSpaces, the first chunk isn't |
coleenp@4037 | 1992 | // small, so small will be null. Link this first chunk as the current |
coleenp@4037 | 1993 | // chunk. |
coleenp@4037 | 1994 | if (make_current) { |
coleenp@4037 | 1995 | // Set as the current chunk but otherwise treat as a humongous chunk. |
coleenp@4037 | 1996 | set_current_chunk(new_chunk); |
coleenp@4037 | 1997 | } |
coleenp@4037 | 1998 | // Link at head. The _current_chunk only points to a humongous chunk for |
coleenp@4037 | 1999 | // the null class loader metaspace (class and data virtual space managers) |
coleenp@4037 | 2000 | // any humongous chunks so will not point to the tail |
coleenp@4037 | 2001 | // of the humongous chunks list. |
coleenp@4037 | 2002 | new_chunk->set_next(chunks_in_use(HumongousIndex)); |
coleenp@4037 | 2003 | set_chunks_in_use(HumongousIndex, new_chunk); |
coleenp@4037 | 2004 | |
coleenp@4037 | 2005 | assert(new_chunk->word_size() > MediumChunk, "List inconsistency"); |
coleenp@4037 | 2006 | } |
coleenp@4037 | 2007 | } |
coleenp@4037 | 2008 | |
coleenp@4037 | 2009 | assert(new_chunk->is_empty(), "Not ready for reuse"); |
coleenp@4037 | 2010 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2011 | gclog_or_tty->print("SpaceManager::add_chunk: %d) ", |
coleenp@4037 | 2012 | sum_count_in_chunks_in_use()); |
coleenp@4037 | 2013 | new_chunk->print_on(gclog_or_tty); |
coleenp@4037 | 2014 | vs_list()->chunk_manager()->locked_print_free_chunks(tty); |
coleenp@4037 | 2015 | } |
coleenp@4037 | 2016 | } |
coleenp@4037 | 2017 | |
coleenp@4037 | 2018 | MetaWord* SpaceManager::allocate(size_t word_size) { |
coleenp@4037 | 2019 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2020 | |
coleenp@4037 | 2021 | // If only the dictionary is going to be used (i.e., no |
coleenp@4037 | 2022 | // indexed free list), then there is a minimum size requirement. |
coleenp@4037 | 2023 | // MinChunkSize is a placeholder for the real minimum size JJJ |
jmasa@4196 | 2024 | size_t byte_size = word_size * BytesPerWord; |
jmasa@4196 | 2025 | |
jmasa@4196 | 2026 | size_t byte_size_with_overhead = byte_size + Metablock::overhead(); |
jmasa@4196 | 2027 | |
jmasa@4196 | 2028 | size_t raw_bytes_size = MAX2(byte_size_with_overhead, |
jmasa@4196 | 2029 | Metablock::min_block_byte_size()); |
jmasa@4196 | 2030 | raw_bytes_size = ARENA_ALIGN(raw_bytes_size); |
coleenp@4037 | 2031 | size_t raw_word_size = raw_bytes_size / BytesPerWord; |
coleenp@4037 | 2032 | assert(raw_word_size * BytesPerWord == raw_bytes_size, "Size problem"); |
coleenp@4037 | 2033 | |
coleenp@4037 | 2034 | BlockFreelist* fl = block_freelists(); |
jmasa@4196 | 2035 | MetaWord* p = NULL; |
coleenp@4037 | 2036 | // Allocation from the dictionary is expensive in the sense that |
coleenp@4037 | 2037 | // the dictionary has to be searched for a size. Don't allocate |
coleenp@4037 | 2038 | // from the dictionary until it starts to get fat. Is this |
coleenp@4037 | 2039 | // a reasonable policy? Maybe an skinny dictionary is fast enough |
coleenp@4037 | 2040 | // for allocations. Do some profiling. JJJ |
jmasa@4196 | 2041 | if (fl->total_size() > allocation_from_dictionary_limit) { |
jmasa@4196 | 2042 | p = fl->get_block(raw_word_size); |
coleenp@4037 | 2043 | } |
jmasa@4196 | 2044 | if (p == NULL) { |
jmasa@4196 | 2045 | p = allocate_work(raw_word_size); |
coleenp@4037 | 2046 | } |
coleenp@4037 | 2047 | Metadebug::deallocate_block_a_lot(this, raw_word_size); |
coleenp@4037 | 2048 | |
jmasa@4196 | 2049 | return p; |
coleenp@4037 | 2050 | } |
coleenp@4037 | 2051 | |
coleenp@4037 | 2052 | // Returns the address of spaced allocated for "word_size". |
coleenp@4037 | 2053 | // This methods does not know about blocks (Metablocks) |
jmasa@4196 | 2054 | MetaWord* SpaceManager::allocate_work(size_t word_size) { |
coleenp@4037 | 2055 | assert_lock_strong(_lock); |
coleenp@4037 | 2056 | #ifdef ASSERT |
coleenp@4037 | 2057 | if (Metadebug::test_metadata_failure()) { |
coleenp@4037 | 2058 | return NULL; |
coleenp@4037 | 2059 | } |
coleenp@4037 | 2060 | #endif |
coleenp@4037 | 2061 | // Is there space in the current chunk? |
jmasa@4196 | 2062 | MetaWord* result = NULL; |
coleenp@4037 | 2063 | |
coleenp@4037 | 2064 | // For DumpSharedSpaces, only allocate out of the current chunk which is |
coleenp@4037 | 2065 | // never null because we gave it the size we wanted. Caller reports out |
coleenp@4037 | 2066 | // of memory if this returns null. |
coleenp@4037 | 2067 | if (DumpSharedSpaces) { |
coleenp@4037 | 2068 | assert(current_chunk() != NULL, "should never happen"); |
coleenp@4037 | 2069 | inc_allocation_total(word_size); |
coleenp@4037 | 2070 | return current_chunk()->allocate(word_size); // caller handles null result |
coleenp@4037 | 2071 | } |
coleenp@4037 | 2072 | if (current_chunk() != NULL) { |
coleenp@4037 | 2073 | result = current_chunk()->allocate(word_size); |
coleenp@4037 | 2074 | } |
coleenp@4037 | 2075 | |
coleenp@4037 | 2076 | if (result == NULL) { |
coleenp@4037 | 2077 | result = grow_and_allocate(word_size); |
coleenp@4037 | 2078 | } |
coleenp@4037 | 2079 | if (result > 0) { |
coleenp@4037 | 2080 | inc_allocation_total(word_size); |
jmasa@4196 | 2081 | assert(result != (MetaWord*) chunks_in_use(MediumIndex), |
jmasa@4196 | 2082 | "Head of the list is being allocated"); |
coleenp@4037 | 2083 | } |
coleenp@4037 | 2084 | |
coleenp@4037 | 2085 | return result; |
coleenp@4037 | 2086 | } |
coleenp@4037 | 2087 | |
coleenp@4037 | 2088 | void SpaceManager::verify() { |
coleenp@4037 | 2089 | // If there are blocks in the dictionary, then |
coleenp@4037 | 2090 | // verfication of chunks does not work since |
coleenp@4037 | 2091 | // being in the dictionary alters a chunk. |
jmasa@4196 | 2092 | if (block_freelists()->total_size() == 0) { |
coleenp@4037 | 2093 | // Skip the small chunks because their next link points to |
coleenp@4037 | 2094 | // medium chunks. This is because the small chunk is the |
coleenp@4037 | 2095 | // current chunk (for allocations) until it is full and the |
coleenp@4037 | 2096 | // the addition of the next chunk does not NULL the next |
coleenp@4037 | 2097 | // like of the small chunk. |
jmasa@4196 | 2098 | for (ChunkIndex i = MediumIndex; i < NumberOfInUseLists; i = next_chunk_index(i)) { |
coleenp@4037 | 2099 | Metachunk* curr = chunks_in_use(i); |
coleenp@4037 | 2100 | while (curr != NULL) { |
coleenp@4037 | 2101 | curr->verify(); |
jmasa@4327 | 2102 | verify_chunk_size(curr); |
coleenp@4037 | 2103 | curr = curr->next(); |
coleenp@4037 | 2104 | } |
coleenp@4037 | 2105 | } |
coleenp@4037 | 2106 | } |
coleenp@4037 | 2107 | } |
coleenp@4037 | 2108 | |
jmasa@4327 | 2109 | void SpaceManager::verify_chunk_size(Metachunk* chunk) { |
jmasa@4327 | 2110 | assert(is_humongous(chunk->word_size()) || |
jmasa@4327 | 2111 | chunk->word_size() == MediumChunk || |
jmasa@4327 | 2112 | chunk->word_size() == SmallChunk, |
jmasa@4327 | 2113 | "Chunk size is wrong"); |
jmasa@4327 | 2114 | return; |
jmasa@4327 | 2115 | } |
jmasa@4327 | 2116 | |
coleenp@4037 | 2117 | #ifdef ASSERT |
coleenp@4037 | 2118 | void SpaceManager::verify_allocation_total() { |
coleenp@4037 | 2119 | #if 0 |
coleenp@4037 | 2120 | // Verification is only guaranteed at a safepoint. |
coleenp@4037 | 2121 | if (SafepointSynchronize::is_at_safepoint()) { |
coleenp@4037 | 2122 | gclog_or_tty->print_cr("Chunk " PTR_FORMAT " allocation_total " SIZE_FORMAT |
coleenp@4037 | 2123 | " sum_used_in_chunks_in_use " SIZE_FORMAT, |
coleenp@4037 | 2124 | this, |
coleenp@4037 | 2125 | allocation_total(), |
coleenp@4037 | 2126 | sum_used_in_chunks_in_use()); |
coleenp@4037 | 2127 | } |
coleenp@4037 | 2128 | MutexLockerEx cl(lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2129 | assert(allocation_total() == sum_used_in_chunks_in_use(), |
coleenp@4037 | 2130 | err_msg("allocation total is not consistent %d vs %d", |
coleenp@4037 | 2131 | allocation_total(), sum_used_in_chunks_in_use())); |
coleenp@4037 | 2132 | #endif |
coleenp@4037 | 2133 | } |
coleenp@4037 | 2134 | |
coleenp@4037 | 2135 | #endif |
coleenp@4037 | 2136 | |
coleenp@4037 | 2137 | void SpaceManager::dump(outputStream* const out) const { |
coleenp@4037 | 2138 | size_t curr_total = 0; |
coleenp@4037 | 2139 | size_t waste = 0; |
coleenp@4037 | 2140 | uint i = 0; |
coleenp@4037 | 2141 | size_t used = 0; |
coleenp@4037 | 2142 | size_t capacity = 0; |
coleenp@4037 | 2143 | |
coleenp@4037 | 2144 | // Add up statistics for all chunks in this SpaceManager. |
coleenp@4037 | 2145 | for (ChunkIndex index = SmallIndex; |
jmasa@4196 | 2146 | index < NumberOfInUseLists; |
coleenp@4037 | 2147 | index = next_chunk_index(index)) { |
coleenp@4037 | 2148 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2149 | curr != NULL; |
coleenp@4037 | 2150 | curr = curr->next()) { |
coleenp@4037 | 2151 | out->print("%d) ", i++); |
coleenp@4037 | 2152 | curr->print_on(out); |
coleenp@4037 | 2153 | if (TraceMetadataChunkAllocation && Verbose) { |
coleenp@4037 | 2154 | block_freelists()->print_on(out); |
coleenp@4037 | 2155 | } |
coleenp@4037 | 2156 | curr_total += curr->word_size(); |
coleenp@4037 | 2157 | used += curr->used_word_size(); |
coleenp@4037 | 2158 | capacity += curr->capacity_word_size(); |
coleenp@4037 | 2159 | waste += curr->free_word_size() + curr->overhead();; |
coleenp@4037 | 2160 | } |
coleenp@4037 | 2161 | } |
coleenp@4037 | 2162 | |
coleenp@4037 | 2163 | size_t free = current_chunk()->free_word_size(); |
coleenp@4037 | 2164 | // Free space isn't wasted. |
coleenp@4037 | 2165 | waste -= free; |
coleenp@4037 | 2166 | |
coleenp@4037 | 2167 | out->print_cr("total of all chunks " SIZE_FORMAT " used " SIZE_FORMAT |
coleenp@4037 | 2168 | " free " SIZE_FORMAT " capacity " SIZE_FORMAT |
coleenp@4037 | 2169 | " waste " SIZE_FORMAT, curr_total, used, free, capacity, waste); |
coleenp@4037 | 2170 | } |
coleenp@4037 | 2171 | |
coleenp@4304 | 2172 | #ifndef PRODUCT |
coleenp@4037 | 2173 | void SpaceManager::mangle_freed_chunks() { |
coleenp@4037 | 2174 | for (ChunkIndex index = SmallIndex; |
jmasa@4196 | 2175 | index < NumberOfInUseLists; |
coleenp@4037 | 2176 | index = next_chunk_index(index)) { |
coleenp@4037 | 2177 | for (Metachunk* curr = chunks_in_use(index); |
coleenp@4037 | 2178 | curr != NULL; |
coleenp@4037 | 2179 | curr = curr->next()) { |
coleenp@4037 | 2180 | // Try to detect incorrectly terminated small chunk |
coleenp@4037 | 2181 | // list. |
coleenp@4037 | 2182 | assert(index == MediumIndex || curr != chunks_in_use(MediumIndex), |
coleenp@4037 | 2183 | err_msg("Mangling medium chunks in small chunks? " |
coleenp@4037 | 2184 | "curr " PTR_FORMAT " medium list " PTR_FORMAT, |
coleenp@4037 | 2185 | curr, chunks_in_use(MediumIndex))); |
coleenp@4037 | 2186 | curr->mangle(); |
coleenp@4037 | 2187 | } |
coleenp@4037 | 2188 | } |
coleenp@4037 | 2189 | } |
coleenp@4304 | 2190 | #endif // PRODUCT |
coleenp@4037 | 2191 | |
coleenp@4037 | 2192 | |
coleenp@4037 | 2193 | // MetaspaceAux |
coleenp@4037 | 2194 | |
coleenp@4304 | 2195 | size_t MetaspaceAux::used_in_bytes() { |
coleenp@4304 | 2196 | return (Metaspace::class_space_list()->used_words_sum() + |
coleenp@4304 | 2197 | Metaspace::space_list()->used_words_sum()) * BytesPerWord; |
coleenp@4304 | 2198 | } |
coleenp@4304 | 2199 | |
jmasa@4046 | 2200 | size_t MetaspaceAux::used_in_bytes(Metaspace::MetadataType mdtype) { |
jmasa@4042 | 2201 | size_t used = 0; |
jmasa@4042 | 2202 | ClassLoaderDataGraphMetaspaceIterator iter; |
jmasa@4042 | 2203 | while (iter.repeat()) { |
jmasa@4042 | 2204 | Metaspace* msp = iter.get_next(); |
jmasa@4042 | 2205 | // Sum allocation_total for each metaspace |
jmasa@4042 | 2206 | if (msp != NULL) { |
jmasa@4042 | 2207 | used += msp->used_words(mdtype); |
jmasa@4042 | 2208 | } |
jmasa@4042 | 2209 | } |
jmasa@4042 | 2210 | return used * BytesPerWord; |
jmasa@4042 | 2211 | } |
jmasa@4042 | 2212 | |
coleenp@4037 | 2213 | size_t MetaspaceAux::free_in_bytes(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2214 | size_t free = 0; |
coleenp@4037 | 2215 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2216 | while (iter.repeat()) { |
coleenp@4037 | 2217 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2218 | if (msp != NULL) { |
coleenp@4037 | 2219 | free += msp->free_words(mdtype); |
coleenp@4037 | 2220 | } |
coleenp@4037 | 2221 | } |
coleenp@4037 | 2222 | return free * BytesPerWord; |
coleenp@4037 | 2223 | } |
coleenp@4037 | 2224 | |
coleenp@4037 | 2225 | // The total words available for metadata allocation. This |
coleenp@4037 | 2226 | // uses Metaspace capacity_words() which is the total words |
coleenp@4037 | 2227 | // in chunks allocated for a Metaspace. |
coleenp@4304 | 2228 | size_t MetaspaceAux::capacity_in_bytes() { |
coleenp@4304 | 2229 | return (Metaspace::class_space_list()->capacity_words_sum() + |
coleenp@4304 | 2230 | Metaspace::space_list()->capacity_words_sum()) * BytesPerWord; |
coleenp@4304 | 2231 | } |
coleenp@4304 | 2232 | |
coleenp@4037 | 2233 | size_t MetaspaceAux::capacity_in_bytes(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2234 | size_t capacity = free_chunks_total(mdtype); |
coleenp@4037 | 2235 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2236 | while (iter.repeat()) { |
coleenp@4037 | 2237 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2238 | if (msp != NULL) { |
coleenp@4037 | 2239 | capacity += msp->capacity_words(mdtype); |
coleenp@4037 | 2240 | } |
coleenp@4037 | 2241 | } |
coleenp@4037 | 2242 | return capacity * BytesPerWord; |
coleenp@4037 | 2243 | } |
coleenp@4037 | 2244 | |
coleenp@4304 | 2245 | size_t MetaspaceAux::reserved_in_bytes() { |
coleenp@4304 | 2246 | return (Metaspace::class_space_list()->virtual_space_total() + |
coleenp@4304 | 2247 | Metaspace::space_list()->virtual_space_total()) * BytesPerWord; |
coleenp@4304 | 2248 | } |
coleenp@4304 | 2249 | |
coleenp@4037 | 2250 | size_t MetaspaceAux::reserved_in_bytes(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2251 | size_t reserved = (mdtype == Metaspace::ClassType) ? |
coleenp@4037 | 2252 | Metaspace::class_space_list()->virtual_space_total() : |
coleenp@4037 | 2253 | Metaspace::space_list()->virtual_space_total(); |
coleenp@4037 | 2254 | return reserved * BytesPerWord; |
coleenp@4037 | 2255 | } |
coleenp@4037 | 2256 | |
coleenp@4037 | 2257 | size_t MetaspaceAux::min_chunk_size() { return SpaceManager::MediumChunk; } |
coleenp@4037 | 2258 | |
coleenp@4037 | 2259 | size_t MetaspaceAux::free_chunks_total(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2260 | ChunkManager* chunk = (mdtype == Metaspace::ClassType) ? |
coleenp@4037 | 2261 | Metaspace::class_space_list()->chunk_manager() : |
coleenp@4037 | 2262 | Metaspace::space_list()->chunk_manager(); |
mgerdin@4264 | 2263 | chunk->slow_verify(); |
coleenp@4037 | 2264 | return chunk->free_chunks_total(); |
coleenp@4037 | 2265 | } |
coleenp@4037 | 2266 | |
coleenp@4037 | 2267 | size_t MetaspaceAux::free_chunks_total_in_bytes(Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2268 | return free_chunks_total(mdtype) * BytesPerWord; |
coleenp@4037 | 2269 | } |
coleenp@4037 | 2270 | |
coleenp@4037 | 2271 | void MetaspaceAux::print_metaspace_change(size_t prev_metadata_used) { |
coleenp@4037 | 2272 | gclog_or_tty->print(", [Metaspace:"); |
coleenp@4037 | 2273 | if (PrintGCDetails && Verbose) { |
coleenp@4037 | 2274 | gclog_or_tty->print(" " SIZE_FORMAT |
coleenp@4037 | 2275 | "->" SIZE_FORMAT |
coleenp@4037 | 2276 | "(" SIZE_FORMAT "/" SIZE_FORMAT ")", |
coleenp@4037 | 2277 | prev_metadata_used, |
coleenp@4037 | 2278 | used_in_bytes(), |
coleenp@4037 | 2279 | capacity_in_bytes(), |
coleenp@4037 | 2280 | reserved_in_bytes()); |
coleenp@4037 | 2281 | } else { |
coleenp@4037 | 2282 | gclog_or_tty->print(" " SIZE_FORMAT "K" |
coleenp@4037 | 2283 | "->" SIZE_FORMAT "K" |
coleenp@4037 | 2284 | "(" SIZE_FORMAT "K/" SIZE_FORMAT "K)", |
coleenp@4037 | 2285 | prev_metadata_used / K, |
coleenp@4037 | 2286 | used_in_bytes()/ K, |
coleenp@4037 | 2287 | capacity_in_bytes()/K, |
coleenp@4037 | 2288 | reserved_in_bytes()/ K); |
coleenp@4037 | 2289 | } |
coleenp@4037 | 2290 | |
coleenp@4037 | 2291 | gclog_or_tty->print("]"); |
coleenp@4037 | 2292 | } |
coleenp@4037 | 2293 | |
coleenp@4037 | 2294 | // This is printed when PrintGCDetails |
coleenp@4037 | 2295 | void MetaspaceAux::print_on(outputStream* out) { |
coleenp@4037 | 2296 | Metaspace::MetadataType ct = Metaspace::ClassType; |
coleenp@4037 | 2297 | Metaspace::MetadataType nct = Metaspace::NonClassType; |
coleenp@4037 | 2298 | |
coleenp@4037 | 2299 | out->print_cr(" Metaspace total " |
coleenp@4037 | 2300 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
coleenp@4037 | 2301 | " reserved " SIZE_FORMAT "K", |
jmasa@4046 | 2302 | capacity_in_bytes()/K, used_in_bytes()/K, reserved_in_bytes()/K); |
coleenp@4037 | 2303 | out->print_cr(" data space " |
coleenp@4037 | 2304 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
coleenp@4037 | 2305 | " reserved " SIZE_FORMAT "K", |
jmasa@4046 | 2306 | capacity_in_bytes(nct)/K, used_in_bytes(nct)/K, reserved_in_bytes(nct)/K); |
coleenp@4037 | 2307 | out->print_cr(" class space " |
coleenp@4037 | 2308 | SIZE_FORMAT "K, used " SIZE_FORMAT "K," |
coleenp@4037 | 2309 | " reserved " SIZE_FORMAT "K", |
jmasa@4046 | 2310 | capacity_in_bytes(ct)/K, used_in_bytes(ct)/K, reserved_in_bytes(ct)/K); |
coleenp@4037 | 2311 | } |
coleenp@4037 | 2312 | |
coleenp@4037 | 2313 | // Print information for class space and data space separately. |
coleenp@4037 | 2314 | // This is almost the same as above. |
coleenp@4037 | 2315 | void MetaspaceAux::print_on(outputStream* out, Metaspace::MetadataType mdtype) { |
coleenp@4037 | 2316 | size_t free_chunks_capacity_bytes = free_chunks_total_in_bytes(mdtype); |
coleenp@4037 | 2317 | size_t capacity_bytes = capacity_in_bytes(mdtype); |
coleenp@4037 | 2318 | size_t used_bytes = used_in_bytes(mdtype); |
coleenp@4037 | 2319 | size_t free_bytes = free_in_bytes(mdtype); |
coleenp@4037 | 2320 | size_t used_and_free = used_bytes + free_bytes + |
coleenp@4037 | 2321 | free_chunks_capacity_bytes; |
coleenp@4037 | 2322 | out->print_cr(" Chunk accounting: used in chunks " SIZE_FORMAT |
coleenp@4037 | 2323 | "K + unused in chunks " SIZE_FORMAT "K + " |
coleenp@4037 | 2324 | " capacity in free chunks " SIZE_FORMAT "K = " SIZE_FORMAT |
coleenp@4037 | 2325 | "K capacity in allocated chunks " SIZE_FORMAT "K", |
coleenp@4037 | 2326 | used_bytes / K, |
coleenp@4037 | 2327 | free_bytes / K, |
coleenp@4037 | 2328 | free_chunks_capacity_bytes / K, |
coleenp@4037 | 2329 | used_and_free / K, |
coleenp@4037 | 2330 | capacity_bytes / K); |
coleenp@4037 | 2331 | assert(used_and_free == capacity_bytes, "Accounting is wrong"); |
coleenp@4037 | 2332 | } |
coleenp@4037 | 2333 | |
coleenp@4037 | 2334 | // Print total fragmentation for class and data metaspaces separately |
coleenp@4037 | 2335 | void MetaspaceAux::print_waste(outputStream* out) { |
coleenp@4037 | 2336 | |
coleenp@4037 | 2337 | size_t small_waste = 0, medium_waste = 0, large_waste = 0; |
coleenp@4037 | 2338 | size_t cls_small_waste = 0, cls_medium_waste = 0, cls_large_waste = 0; |
coleenp@4037 | 2339 | |
coleenp@4037 | 2340 | ClassLoaderDataGraphMetaspaceIterator iter; |
coleenp@4037 | 2341 | while (iter.repeat()) { |
coleenp@4037 | 2342 | Metaspace* msp = iter.get_next(); |
coleenp@4037 | 2343 | if (msp != NULL) { |
coleenp@4037 | 2344 | small_waste += msp->vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
coleenp@4037 | 2345 | medium_waste += msp->vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
coleenp@4037 | 2346 | large_waste += msp->vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
coleenp@4037 | 2347 | |
coleenp@4037 | 2348 | cls_small_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(SmallIndex); |
coleenp@4037 | 2349 | cls_medium_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(MediumIndex); |
coleenp@4037 | 2350 | cls_large_waste += msp->class_vsm()->sum_waste_in_chunks_in_use(HumongousIndex); |
coleenp@4037 | 2351 | } |
coleenp@4037 | 2352 | } |
coleenp@4037 | 2353 | out->print_cr("Total fragmentation waste (words) doesn't count free space"); |
coleenp@4037 | 2354 | out->print(" data: small " SIZE_FORMAT " medium " SIZE_FORMAT, |
coleenp@4037 | 2355 | small_waste, medium_waste); |
coleenp@4037 | 2356 | out->print_cr(" class: small " SIZE_FORMAT, cls_small_waste); |
coleenp@4037 | 2357 | } |
coleenp@4037 | 2358 | |
coleenp@4037 | 2359 | // Dump global metaspace things from the end of ClassLoaderDataGraph |
coleenp@4037 | 2360 | void MetaspaceAux::dump(outputStream* out) { |
coleenp@4037 | 2361 | out->print_cr("All Metaspace:"); |
coleenp@4037 | 2362 | out->print("data space: "); print_on(out, Metaspace::NonClassType); |
coleenp@4037 | 2363 | out->print("class space: "); print_on(out, Metaspace::ClassType); |
coleenp@4037 | 2364 | print_waste(out); |
coleenp@4037 | 2365 | } |
coleenp@4037 | 2366 | |
mgerdin@4264 | 2367 | void MetaspaceAux::verify_free_chunks() { |
mgerdin@4264 | 2368 | Metaspace::space_list()->chunk_manager()->verify(); |
mgerdin@4264 | 2369 | Metaspace::class_space_list()->chunk_manager()->verify(); |
mgerdin@4264 | 2370 | } |
mgerdin@4264 | 2371 | |
coleenp@4037 | 2372 | // Metaspace methods |
coleenp@4037 | 2373 | |
coleenp@4037 | 2374 | size_t Metaspace::_first_chunk_word_size = 0; |
coleenp@4037 | 2375 | |
coleenp@4037 | 2376 | Metaspace::Metaspace(Mutex* lock, size_t word_size) { |
coleenp@4037 | 2377 | initialize(lock, word_size); |
coleenp@4037 | 2378 | } |
coleenp@4037 | 2379 | |
coleenp@4037 | 2380 | Metaspace::Metaspace(Mutex* lock) { |
coleenp@4037 | 2381 | initialize(lock); |
coleenp@4037 | 2382 | } |
coleenp@4037 | 2383 | |
coleenp@4037 | 2384 | Metaspace::~Metaspace() { |
coleenp@4037 | 2385 | delete _vsm; |
coleenp@4037 | 2386 | delete _class_vsm; |
coleenp@4037 | 2387 | } |
coleenp@4037 | 2388 | |
coleenp@4037 | 2389 | VirtualSpaceList* Metaspace::_space_list = NULL; |
coleenp@4037 | 2390 | VirtualSpaceList* Metaspace::_class_space_list = NULL; |
coleenp@4037 | 2391 | |
coleenp@4037 | 2392 | #define VIRTUALSPACEMULTIPLIER 2 |
coleenp@4037 | 2393 | |
coleenp@4037 | 2394 | void Metaspace::global_initialize() { |
coleenp@4037 | 2395 | // Initialize the alignment for shared spaces. |
coleenp@4037 | 2396 | int max_alignment = os::vm_page_size(); |
coleenp@4037 | 2397 | MetaspaceShared::set_max_alignment(max_alignment); |
coleenp@4037 | 2398 | |
coleenp@4037 | 2399 | if (DumpSharedSpaces) { |
coleenp@4037 | 2400 | SharedReadOnlySize = align_size_up(SharedReadOnlySize, max_alignment); |
coleenp@4037 | 2401 | SharedReadWriteSize = align_size_up(SharedReadWriteSize, max_alignment); |
coleenp@4037 | 2402 | SharedMiscDataSize = align_size_up(SharedMiscDataSize, max_alignment); |
coleenp@4037 | 2403 | SharedMiscCodeSize = align_size_up(SharedMiscCodeSize, max_alignment); |
coleenp@4037 | 2404 | |
coleenp@4037 | 2405 | // Initialize with the sum of the shared space sizes. The read-only |
coleenp@4037 | 2406 | // and read write metaspace chunks will be allocated out of this and the |
coleenp@4037 | 2407 | // remainder is the misc code and data chunks. |
coleenp@4037 | 2408 | size_t total = align_size_up(SharedReadOnlySize + SharedReadWriteSize + |
coleenp@4037 | 2409 | SharedMiscDataSize + SharedMiscCodeSize, |
coleenp@4037 | 2410 | os::vm_allocation_granularity()); |
coleenp@4037 | 2411 | size_t word_size = total/wordSize; |
coleenp@4037 | 2412 | _space_list = new VirtualSpaceList(word_size); |
coleenp@4037 | 2413 | } else { |
coleenp@4037 | 2414 | // If using shared space, open the file that contains the shared space |
coleenp@4037 | 2415 | // and map in the memory before initializing the rest of metaspace (so |
coleenp@4037 | 2416 | // the addresses don't conflict) |
coleenp@4037 | 2417 | if (UseSharedSpaces) { |
coleenp@4037 | 2418 | FileMapInfo* mapinfo = new FileMapInfo(); |
coleenp@4037 | 2419 | memset(mapinfo, 0, sizeof(FileMapInfo)); |
coleenp@4037 | 2420 | |
coleenp@4037 | 2421 | // Open the shared archive file, read and validate the header. If |
coleenp@4037 | 2422 | // initialization fails, shared spaces [UseSharedSpaces] are |
coleenp@4037 | 2423 | // disabled and the file is closed. |
coleenp@4037 | 2424 | // Map in spaces now also |
coleenp@4037 | 2425 | if (mapinfo->initialize() && MetaspaceShared::map_shared_spaces(mapinfo)) { |
coleenp@4037 | 2426 | FileMapInfo::set_current_info(mapinfo); |
coleenp@4037 | 2427 | } else { |
coleenp@4037 | 2428 | assert(!mapinfo->is_open() && !UseSharedSpaces, |
coleenp@4037 | 2429 | "archive file not closed or shared spaces not disabled."); |
coleenp@4037 | 2430 | } |
coleenp@4037 | 2431 | } |
coleenp@4037 | 2432 | |
coleenp@4037 | 2433 | // Initialize this before initializing the VirtualSpaceList |
coleenp@4037 | 2434 | _first_chunk_word_size = InitialBootClassLoaderMetaspaceSize / BytesPerWord; |
coleenp@4037 | 2435 | // Arbitrarily set the initial virtual space to a multiple |
coleenp@4037 | 2436 | // of the boot class loader size. |
coleenp@4037 | 2437 | size_t word_size = VIRTUALSPACEMULTIPLIER * Metaspace::first_chunk_word_size(); |
coleenp@4037 | 2438 | // Initialize the list of virtual spaces. |
coleenp@4037 | 2439 | _space_list = new VirtualSpaceList(word_size); |
coleenp@4037 | 2440 | } |
coleenp@4037 | 2441 | } |
coleenp@4037 | 2442 | |
coleenp@4037 | 2443 | // For UseCompressedKlassPointers the class space is reserved as a piece of the |
coleenp@4037 | 2444 | // Java heap because the compression algorithm is the same for each. The |
coleenp@4037 | 2445 | // argument passed in is at the top of the compressed space |
coleenp@4037 | 2446 | void Metaspace::initialize_class_space(ReservedSpace rs) { |
coleenp@4037 | 2447 | // The reserved space size may be bigger because of alignment, esp with UseLargePages |
coleenp@4037 | 2448 | assert(rs.size() >= ClassMetaspaceSize, err_msg("%d != %d", rs.size(), ClassMetaspaceSize)); |
coleenp@4037 | 2449 | _class_space_list = new VirtualSpaceList(rs); |
coleenp@4037 | 2450 | } |
coleenp@4037 | 2451 | |
coleenp@4037 | 2452 | |
coleenp@4037 | 2453 | void Metaspace::initialize(Mutex* lock, size_t initial_size) { |
coleenp@4048 | 2454 | // Use SmallChunk size if not specified. If specified, use this size for |
coleenp@4048 | 2455 | // the data metaspace. |
coleenp@4037 | 2456 | size_t word_size; |
coleenp@4037 | 2457 | size_t class_word_size; |
coleenp@4037 | 2458 | if (initial_size == 0) { |
coleenp@4037 | 2459 | word_size = (size_t) SpaceManager::SmallChunk; |
coleenp@4048 | 2460 | class_word_size = (size_t) SpaceManager::SmallChunk; |
coleenp@4037 | 2461 | } else { |
coleenp@4037 | 2462 | word_size = initial_size; |
coleenp@4048 | 2463 | // Make the first class chunk bigger than a medium chunk so it's not put |
coleenp@4048 | 2464 | // on the medium chunk list. The next chunk will be small and progress |
coleenp@4048 | 2465 | // from there. This size calculated by -version. |
coleenp@4048 | 2466 | class_word_size = MIN2((size_t)SpaceManager::MediumChunk*5, |
coleenp@4048 | 2467 | (ClassMetaspaceSize/BytesPerWord)*2); |
coleenp@4037 | 2468 | } |
coleenp@4037 | 2469 | |
coleenp@4037 | 2470 | assert(space_list() != NULL, |
coleenp@4037 | 2471 | "Metadata VirtualSpaceList has not been initialized"); |
coleenp@4037 | 2472 | |
coleenp@4037 | 2473 | _vsm = new SpaceManager(lock, space_list()); |
coleenp@4037 | 2474 | if (_vsm == NULL) { |
coleenp@4037 | 2475 | return; |
coleenp@4037 | 2476 | } |
coleenp@4037 | 2477 | |
coleenp@4037 | 2478 | assert(class_space_list() != NULL, |
coleenp@4037 | 2479 | "Class VirtualSpaceList has not been initialized"); |
coleenp@4037 | 2480 | |
coleenp@4037 | 2481 | // Allocate SpaceManager for classes. |
coleenp@4037 | 2482 | _class_vsm = new SpaceManager(lock, class_space_list()); |
coleenp@4037 | 2483 | if (_class_vsm == NULL) { |
coleenp@4037 | 2484 | return; |
coleenp@4037 | 2485 | } |
coleenp@4037 | 2486 | |
coleenp@4037 | 2487 | MutexLockerEx cl(SpaceManager::expand_lock(), Mutex::_no_safepoint_check_flag); |
coleenp@4037 | 2488 | |
coleenp@4037 | 2489 | // Allocate chunk for metadata objects |
coleenp@4037 | 2490 | Metachunk* new_chunk = |
coleenp@4037 | 2491 | space_list()->current_virtual_space()->get_chunk_vs_with_expand(word_size); |
coleenp@4037 | 2492 | assert(!DumpSharedSpaces || new_chunk != NULL, "should have enough space for both chunks"); |
coleenp@4037 | 2493 | if (new_chunk != NULL) { |
coleenp@4037 | 2494 | // Add to this manager's list of chunks in use and current_chunk(). |
coleenp@4037 | 2495 | vsm()->add_chunk(new_chunk, true); |
coleenp@4037 | 2496 | } |
coleenp@4037 | 2497 | |
coleenp@4037 | 2498 | // Allocate chunk for class metadata objects |
coleenp@4037 | 2499 | Metachunk* class_chunk = |
coleenp@4037 | 2500 | class_space_list()->current_virtual_space()->get_chunk_vs_with_expand(class_word_size); |
coleenp@4037 | 2501 | if (class_chunk != NULL) { |
coleenp@4037 | 2502 | class_vsm()->add_chunk(class_chunk, true); |
coleenp@4037 | 2503 | } |
coleenp@4037 | 2504 | } |
coleenp@4037 | 2505 | |
coleenp@4037 | 2506 | MetaWord* Metaspace::allocate(size_t word_size, MetadataType mdtype) { |
coleenp@4037 | 2507 | // DumpSharedSpaces doesn't use class metadata area (yet) |
coleenp@4037 | 2508 | if (mdtype == ClassType && !DumpSharedSpaces) { |
jmasa@4196 | 2509 | return class_vsm()->allocate(word_size); |
coleenp@4037 | 2510 | } else { |
jmasa@4196 | 2511 | return vsm()->allocate(word_size); |
coleenp@4037 | 2512 | } |
coleenp@4037 | 2513 | } |
coleenp@4037 | 2514 | |
jmasa@4064 | 2515 | MetaWord* Metaspace::expand_and_allocate(size_t word_size, MetadataType mdtype) { |
jmasa@4064 | 2516 | MetaWord* result; |
jmasa@4064 | 2517 | MetaspaceGC::set_expand_after_GC(true); |
jmasa@4064 | 2518 | size_t before_inc = MetaspaceGC::capacity_until_GC(); |
jmasa@4064 | 2519 | size_t delta_words = MetaspaceGC::delta_capacity_until_GC(word_size); |
jmasa@4064 | 2520 | MetaspaceGC::inc_capacity_until_GC(delta_words); |
jmasa@4064 | 2521 | if (PrintGCDetails && Verbose) { |
jmasa@4064 | 2522 | gclog_or_tty->print_cr("Increase capacity to GC from " SIZE_FORMAT |
jmasa@4064 | 2523 | " to " SIZE_FORMAT, before_inc, MetaspaceGC::capacity_until_GC()); |
jmasa@4064 | 2524 | } |
jmasa@4196 | 2525 | |
jmasa@4064 | 2526 | result = allocate(word_size, mdtype); |
jmasa@4064 | 2527 | |
jmasa@4064 | 2528 | return result; |
jmasa@4064 | 2529 | } |
jmasa@4064 | 2530 | |
coleenp@4037 | 2531 | // Space allocated in the Metaspace. This may |
coleenp@4037 | 2532 | // be across several metadata virtual spaces. |
coleenp@4037 | 2533 | char* Metaspace::bottom() const { |
coleenp@4037 | 2534 | assert(DumpSharedSpaces, "only useful and valid for dumping shared spaces"); |
coleenp@4037 | 2535 | return (char*)vsm()->current_chunk()->bottom(); |
coleenp@4037 | 2536 | } |
coleenp@4037 | 2537 | |
coleenp@4037 | 2538 | size_t Metaspace::used_words(MetadataType mdtype) const { |
coleenp@4037 | 2539 | // return vsm()->allocation_total(); |
coleenp@4037 | 2540 | return mdtype == ClassType ? class_vsm()->sum_used_in_chunks_in_use() : |
coleenp@4037 | 2541 | vsm()->sum_used_in_chunks_in_use(); // includes overhead! |
coleenp@4037 | 2542 | } |
coleenp@4037 | 2543 | |
coleenp@4037 | 2544 | size_t Metaspace::free_words(MetadataType mdtype) const { |
coleenp@4037 | 2545 | return mdtype == ClassType ? class_vsm()->sum_free_in_chunks_in_use() : |
coleenp@4037 | 2546 | vsm()->sum_free_in_chunks_in_use(); |
coleenp@4037 | 2547 | } |
coleenp@4037 | 2548 | |
coleenp@4037 | 2549 | // Space capacity in the Metaspace. It includes |
coleenp@4037 | 2550 | // space in the list of chunks from which allocations |
coleenp@4037 | 2551 | // have been made. Don't include space in the global freelist and |
coleenp@4037 | 2552 | // in the space available in the dictionary which |
coleenp@4037 | 2553 | // is already counted in some chunk. |
coleenp@4037 | 2554 | size_t Metaspace::capacity_words(MetadataType mdtype) const { |
coleenp@4037 | 2555 | return mdtype == ClassType ? class_vsm()->sum_capacity_in_chunks_in_use() : |
coleenp@4037 | 2556 | vsm()->sum_capacity_in_chunks_in_use(); |
coleenp@4037 | 2557 | } |
coleenp@4037 | 2558 | |
coleenp@4037 | 2559 | void Metaspace::deallocate(MetaWord* ptr, size_t word_size, bool is_class) { |
coleenp@4037 | 2560 | if (SafepointSynchronize::is_at_safepoint()) { |
coleenp@4037 | 2561 | assert(Thread::current()->is_VM_thread(), "should be the VM thread"); |
jmasa@4196 | 2562 | // Don't take Heap_lock |
jmasa@4196 | 2563 | MutexLocker ml(vsm()->lock()); |
jmasa@4196 | 2564 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 2565 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 2566 | #ifdef ASSERT |
jmasa@4196 | 2567 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 2568 | #endif |
jmasa@4196 | 2569 | return; |
jmasa@4196 | 2570 | } |
coleenp@4037 | 2571 | if (is_class) { |
jmasa@4196 | 2572 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 2573 | } else { |
jmasa@4196 | 2574 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 2575 | } |
coleenp@4037 | 2576 | } else { |
coleenp@4037 | 2577 | MutexLocker ml(vsm()->lock()); |
coleenp@4037 | 2578 | |
jmasa@4196 | 2579 | if (word_size < TreeChunk<Metablock, FreeList>::min_size()) { |
jmasa@4196 | 2580 | // Dark matter. Too small for dictionary. |
jmasa@4196 | 2581 | #ifdef ASSERT |
jmasa@4196 | 2582 | Copy::fill_to_words((HeapWord*)ptr, word_size, 0xf5f5f5f5); |
jmasa@4196 | 2583 | #endif |
jmasa@4196 | 2584 | return; |
jmasa@4196 | 2585 | } |
coleenp@4037 | 2586 | if (is_class) { |
jmasa@4196 | 2587 | class_vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 2588 | } else { |
jmasa@4196 | 2589 | vsm()->deallocate(ptr, word_size); |
coleenp@4037 | 2590 | } |
coleenp@4037 | 2591 | } |
coleenp@4037 | 2592 | } |
coleenp@4037 | 2593 | |
jmasa@4196 | 2594 | Metablock* Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size, |
coleenp@4037 | 2595 | bool read_only, MetadataType mdtype, TRAPS) { |
coleenp@4037 | 2596 | if (HAS_PENDING_EXCEPTION) { |
coleenp@4037 | 2597 | assert(false, "Should not allocate with exception pending"); |
coleenp@4037 | 2598 | return NULL; // caller does a CHECK_NULL too |
coleenp@4037 | 2599 | } |
coleenp@4037 | 2600 | |
coleenp@4037 | 2601 | // SSS: Should we align the allocations and make sure the sizes are aligned. |
coleenp@4037 | 2602 | MetaWord* result = NULL; |
coleenp@4037 | 2603 | |
coleenp@4037 | 2604 | assert(loader_data != NULL, "Should never pass around a NULL loader_data. " |
coleenp@4037 | 2605 | "ClassLoaderData::the_null_class_loader_data() should have been used."); |
coleenp@4037 | 2606 | // Allocate in metaspaces without taking out a lock, because it deadlocks |
coleenp@4037 | 2607 | // with the SymbolTable_lock. Dumping is single threaded for now. We'll have |
coleenp@4037 | 2608 | // to revisit this for application class data sharing. |
coleenp@4037 | 2609 | if (DumpSharedSpaces) { |
coleenp@4037 | 2610 | if (read_only) { |
coleenp@4037 | 2611 | result = loader_data->ro_metaspace()->allocate(word_size, NonClassType); |
coleenp@4037 | 2612 | } else { |
coleenp@4037 | 2613 | result = loader_data->rw_metaspace()->allocate(word_size, NonClassType); |
coleenp@4037 | 2614 | } |
coleenp@4037 | 2615 | if (result == NULL) { |
coleenp@4037 | 2616 | report_out_of_shared_space(read_only ? SharedReadOnly : SharedReadWrite); |
coleenp@4037 | 2617 | } |
jmasa@4196 | 2618 | return Metablock::initialize(result, word_size); |
coleenp@4037 | 2619 | } |
coleenp@4037 | 2620 | |
coleenp@4037 | 2621 | result = loader_data->metaspace_non_null()->allocate(word_size, mdtype); |
coleenp@4037 | 2622 | |
coleenp@4037 | 2623 | if (result == NULL) { |
coleenp@4037 | 2624 | // Try to clean out some memory and retry. |
coleenp@4037 | 2625 | result = |
jmasa@4196 | 2626 | Universe::heap()->collector_policy()->satisfy_failed_metadata_allocation( |
coleenp@4037 | 2627 | loader_data, word_size, mdtype); |
coleenp@4037 | 2628 | |
coleenp@4037 | 2629 | // If result is still null, we are out of memory. |
coleenp@4037 | 2630 | if (result == NULL) { |
coleenp@4037 | 2631 | // -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
coleenp@4037 | 2632 | report_java_out_of_memory("Metadata space"); |
coleenp@4037 | 2633 | |
coleenp@4037 | 2634 | if (JvmtiExport::should_post_resource_exhausted()) { |
coleenp@4037 | 2635 | JvmtiExport::post_resource_exhausted( |
coleenp@4037 | 2636 | JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
coleenp@4037 | 2637 | "Metadata space"); |
coleenp@4037 | 2638 | } |
coleenp@4037 | 2639 | THROW_OOP_0(Universe::out_of_memory_error_perm_gen()); |
coleenp@4037 | 2640 | } |
coleenp@4037 | 2641 | } |
jmasa@4196 | 2642 | return Metablock::initialize(result, word_size); |
coleenp@4037 | 2643 | } |
coleenp@4037 | 2644 | |
coleenp@4037 | 2645 | void Metaspace::print_on(outputStream* out) const { |
coleenp@4037 | 2646 | // Print both class virtual space counts and metaspace. |
coleenp@4037 | 2647 | if (Verbose) { |
coleenp@4037 | 2648 | vsm()->print_on(out); |
coleenp@4037 | 2649 | class_vsm()->print_on(out); |
coleenp@4037 | 2650 | } |
coleenp@4037 | 2651 | } |
coleenp@4037 | 2652 | |
coleenp@4295 | 2653 | bool Metaspace::contains(const void * ptr) { |
coleenp@4037 | 2654 | if (MetaspaceShared::is_in_shared_space(ptr)) { |
coleenp@4037 | 2655 | return true; |
coleenp@4037 | 2656 | } |
coleenp@4295 | 2657 | // This is checked while unlocked. As long as the virtualspaces are added |
coleenp@4295 | 2658 | // at the end, the pointer will be in one of them. The virtual spaces |
coleenp@4295 | 2659 | // aren't deleted presently. When they are, some sort of locking might |
coleenp@4295 | 2660 | // be needed. Note, locking this can cause inversion problems with the |
coleenp@4295 | 2661 | // caller in MetaspaceObj::is_metadata() function. |
coleenp@4037 | 2662 | return space_list()->contains(ptr) || class_space_list()->contains(ptr); |
coleenp@4037 | 2663 | } |
coleenp@4037 | 2664 | |
coleenp@4037 | 2665 | void Metaspace::verify() { |
coleenp@4037 | 2666 | vsm()->verify(); |
coleenp@4037 | 2667 | class_vsm()->verify(); |
coleenp@4037 | 2668 | } |
coleenp@4037 | 2669 | |
coleenp@4037 | 2670 | void Metaspace::dump(outputStream* const out) const { |
coleenp@4037 | 2671 | if (UseMallocOnly) { |
coleenp@4037 | 2672 | // Just print usage for now |
coleenp@4037 | 2673 | out->print_cr("usage %d", used_words(Metaspace::NonClassType)); |
coleenp@4037 | 2674 | } |
coleenp@4037 | 2675 | out->print_cr("\nVirtual space manager: " INTPTR_FORMAT, vsm()); |
coleenp@4037 | 2676 | vsm()->dump(out); |
coleenp@4037 | 2677 | out->print_cr("\nClass space manager: " INTPTR_FORMAT, class_vsm()); |
coleenp@4037 | 2678 | class_vsm()->dump(out); |
coleenp@4037 | 2679 | } |