1 /* 2 * Copyright (c) 2015, 2020, 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/zList.hpp" 29 #include "gc/z/zLock.hpp" 30 #include "gc/z/zPageCache.hpp" 31 #include "gc/z/zPhysicalMemory.hpp" 32 #include "gc/z/zSafeDelete.hpp" 33 #include "gc/z/zVirtualMemory.hpp" 34 #include "memory/allocation.hpp" 35 36 class ZPageAllocation; 37 class ZWorkers; 38 39 class ZPageAllocator { 40 friend class VMStructs; 41 42 private: 43 ZLock _lock; 44 ZPageCache _cache; 45 ZVirtualMemoryManager _virtual; 46 ZPhysicalMemoryManager _physical; 47 const size_t _min_capacity; 48 const size_t _max_capacity; 49 const size_t _max_reserve; 50 volatile size_t _current_max_capacity; 51 volatile size_t _capacity; 52 volatile size_t _used; 53 size_t _used_high; 54 size_t _used_low; 55 size_t _allocated; 56 ssize_t _reclaimed; 57 ZList<ZPageAllocation> _stalled; 58 ZList<ZPageAllocation> _satisfied; 59 mutable ZSafeDelete<ZPage> _safe_delete; 60 volatile bool _uncommit; 61 bool _initialized; 62 63 bool prime_cache(ZWorkers* workers, size_t size); 64 65 size_t increase_capacity(size_t size); 66 void decrease_capacity(size_t size, bool set_max_capacity); 67 68 void increase_used(size_t size, bool allocation, bool relocation); 69 void decrease_used(size_t size, bool free, bool reclaimed); 70 71 bool commit_page(ZPage* page); 72 void uncommit_page(ZPage* page); 73 74 bool map_page(const ZPage* page) const; 75 void unmap_page(const ZPage* page) const; 76 77 void destroy_page(ZPage* page); 78 79 bool is_alloc_allowed(size_t size, bool no_reserve) const; 80 bool is_alloc_allowed_from_cache(size_t size, bool no_reserve) const; 81 82 bool alloc_page_common_inner(uint8_t type, size_t size, bool no_reserve, ZList<ZPage>* pages); 83 bool alloc_page_common(ZPageAllocation* allocation); 84 bool alloc_page_stall(ZPageAllocation* allocation); 85 bool alloc_page_prepare(ZPageAllocation* allocation); 86 ZPage* alloc_page_create(ZPageAllocation* allocation); 87 ZPage* alloc_page_finish(ZPageAllocation* allocation); 88 void alloc_page_failed(ZPageAllocation* allocation); 89 90 void satisfy_stalled(); 91 92 size_t uncommit_inner(uint64_t delay, uint64_t* timeout); 93 94 public: 95 ZPageAllocator(ZWorkers* workers, 96 size_t min_capacity, 97 size_t initial_capacity, 98 size_t max_capacity, 99 size_t max_reserve); 100 101 bool is_initialized() const; 102 103 size_t min_capacity() const; 104 size_t max_capacity() const; 105 size_t soft_max_capacity() const; 106 size_t capacity() const; 107 size_t max_reserve() const; 108 size_t used_high() const; 109 size_t used_low() const; 110 size_t used() const; 111 size_t unused() const; 112 size_t allocated() const; 113 size_t reclaimed() const; 114 115 void reset_statistics(); 116 117 ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags); 118 void free_page(ZPage* page, bool reclaimed); 119 120 uint64_t uncommit(); 121 void uncommit_cancel(); 122 123 void enable_deferred_delete() const; 124 void disable_deferred_delete() const; 125 126 void debug_map_page(const ZPage* page) const; 127 void debug_unmap_page(const ZPage* page) const; 128 129 bool is_alloc_stalled() const; 130 void check_out_of_memory(); 131 132 void pages_do(ZPageClosure* cl) const; 133 }; 134 135 #endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP