1 /* 2 * Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZPAGEALLOCATOR_HPP 25 #define SHARE_GC_Z_ZPAGEALLOCATOR_HPP 26 27 #include "gc/z/zAllocationFlags.hpp" 28 #include "gc/z/zArray.hpp" 29 #include "gc/z/zList.hpp" 30 #include "gc/z/zLock.hpp" 31 #include "gc/z/zPageCache.hpp" 32 #include "gc/z/zPhysicalMemory.hpp" 33 #include "gc/z/zSafeDelete.hpp" 34 #include "gc/z/zVirtualMemory.hpp" 35 36 class ThreadClosure; 37 class ZPageAllocation; 38 class ZPageAllocatorStats; 39 class ZWorkers; 40 class ZUncommitter; 41 class ZUnmapper; 42 43 class ZPageAllocator { 44 friend class VMStructs; 45 friend class ZUnmapper; 46 friend class ZUncommitter; 47 48 private: 49 mutable ZLock _lock; 50 ZPageCache _cache; 51 ZVirtualMemoryManager _virtual; 52 ZPhysicalMemoryManager _physical; 53 const size_t _min_capacity; 54 const size_t _max_capacity; 55 volatile size_t _current_max_capacity; 56 volatile size_t _capacity; 57 volatile size_t _claimed; 58 volatile size_t _used; 59 size_t _used_high; 60 size_t _used_low; 61 ssize_t _reclaimed; 62 ZList<ZPageAllocation> _stalled; 63 volatile uint64_t _nstalled; 64 ZList<ZPageAllocation> _satisfied; 65 ZUnmapper* _unmapper; 66 ZUncommitter* _uncommitter; 67 mutable ZSafeDelete<ZPage> _safe_delete; 68 bool _initialized; 69 70 bool prime_cache(ZWorkers* workers, size_t size); 71 72 size_t increase_capacity(size_t size); 73 void decrease_capacity(size_t size, bool set_max_capacity); 74 75 void increase_used(size_t size, bool relocation); 76 void decrease_used(size_t size, bool reclaimed); 77 78 bool commit_page(ZPage* page); 79 void uncommit_page(ZPage* page); 80 81 void map_page(const ZPage* page) const; 82 void unmap_page(const ZPage* page) const; 83 84 void destroy_page(ZPage* page); 85 86 bool is_alloc_allowed(size_t size) const; 87 88 bool alloc_page_common_inner(uint8_t type, size_t size, ZList<ZPage>* pages); 89 bool alloc_page_common(ZPageAllocation* allocation); 90 bool alloc_page_stall(ZPageAllocation* allocation); 91 bool alloc_page_or_stall(ZPageAllocation* allocation); 92 ZPage* alloc_page_create(ZPageAllocation* allocation); 93 ZPage* alloc_page_finalize(ZPageAllocation* allocation); 94 void alloc_page_failed(ZPageAllocation* allocation); 95 96 void satisfy_stalled(); 97 98 void free_page_inner(ZPage* page, bool reclaimed); 99 100 size_t uncommit(uint64_t* timeout); 101 102 public: 103 ZPageAllocator(ZWorkers* workers, 104 size_t min_capacity, 105 size_t initial_capacity, 106 size_t max_capacity); 107 108 bool is_initialized() const; 109 110 size_t min_capacity() const; 111 size_t max_capacity() const; 112 size_t soft_max_capacity() const; 113 size_t capacity() const; 114 size_t used() const; 115 size_t unused() const; 116 117 ZPageAllocatorStats stats() const; 118 119 void reset_statistics(); 120 121 ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags); 122 void free_page(ZPage* page, bool reclaimed); 123 void free_pages(const ZArray<ZPage*>* pages, bool reclaimed); 124 125 void enable_deferred_delete() const; 126 void disable_deferred_delete() const; 127 128 void debug_map_page(const ZPage* page) const; 129 void debug_unmap_page(const ZPage* page) const; 130 131 bool has_alloc_stalled() const; 132 void check_out_of_memory(); 133 134 void pages_do(ZPageClosure* cl) const; 135 136 void threads_do(ThreadClosure* tc) const; 137 }; 138 139 class ZPageAllocatorStats { 140 private: 141 size_t _min_capacity; 142 size_t _max_capacity; 143 size_t _soft_max_capacity; 144 size_t _current_max_capacity; 145 size_t _capacity; 146 size_t _used; 147 size_t _used_high; 148 size_t _used_low; 149 size_t _reclaimed; 150 151 public: 152 ZPageAllocatorStats(size_t min_capacity, 153 size_t max_capacity, 154 size_t soft_max_capacity, 155 size_t capacity, 156 size_t used, 157 size_t used_high, 158 size_t used_low, 159 size_t reclaimed); 160 161 size_t min_capacity() const; 162 size_t max_capacity() const; 163 size_t soft_max_capacity() const; 164 size_t capacity() const; 165 size_t used() const; 166 size_t used_high() const; 167 size_t used_low() const; 168 size_t reclaimed() const; 169 }; 170 171 #endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP 172