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 35 class ThreadClosure; 36 class ZPageAllocation; 37 class ZWorkers; 38 class ZUncommitter; 39 class ZUnmapper; 40 41 class ZPageAllocator { 42 friend class VMStructs; 43 friend class ZUnmapper; 44 friend class ZUncommitter; 45 46 private: 47 ZLock _lock; 48 ZPageCache _cache; 49 ZVirtualMemoryManager _virtual; 50 ZPhysicalMemoryManager _physical; 51 const size_t _min_capacity; 52 const size_t _max_capacity; 53 const size_t _max_reserve; 54 volatile size_t _current_max_capacity; 55 volatile size_t _capacity; 56 volatile size_t _claimed; 57 volatile size_t _used; 58 size_t _used_high; 59 size_t _used_low; 60 size_t _allocated; 61 ssize_t _reclaimed; 62 ZList<ZPageAllocation> _stalled; 63 ZList<ZPageAllocation> _satisfied; 64 ZUnmapper* _unmapper; 65 ZUncommitter* _uncommitter; 66 mutable ZSafeDelete<ZPage> _safe_delete; 67 bool _initialized; 68 69 bool prime_cache(ZWorkers* workers, size_t size); 70 71 size_t increase_capacity(size_t size); 72 void decrease_capacity(size_t size, bool set_max_capacity); 73 74 void increase_used(size_t size, bool relocation); 75 void decrease_used(size_t size, bool reclaimed); 76 77 bool commit_page(ZPage* page); 78 void uncommit_page(ZPage* page); 79 80 void map_page(const ZPage* page) const; 81 void unmap_page(const ZPage* page) const; 82 83 void destroy_page(ZPage* page); 84 85 bool is_alloc_allowed(size_t size, bool no_reserve) const; 86 bool is_alloc_allowed_from_cache(size_t size, bool no_reserve) const; 87 88 bool alloc_page_common_inner(uint8_t type, size_t size, bool no_reserve, 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 size_t max_reserve); 108 109 bool is_initialized() const; 110 111 size_t min_capacity() const; 112 size_t max_capacity() const; 113 size_t soft_max_capacity() const; 114 size_t capacity() const; 115 size_t max_reserve() const; 116 size_t used_high() const; 117 size_t used_low() const; 118 size_t used() const; 119 size_t unused() const; 120 size_t allocated() const; 121 size_t reclaimed() const; 122 123 void reset_statistics(); 124 125 ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags); 126 void free_page(ZPage* page, bool reclaimed); 127 128 void enable_deferred_delete() const; 129 void disable_deferred_delete() const; 130 131 void debug_map_page(const ZPage* page) const; 132 void debug_unmap_page(const ZPage* page) const; 133 134 bool is_alloc_stalled() const; 135 void check_out_of_memory(); 136 137 void pages_do(ZPageClosure* cl) const; 138 139 void threads_do(ThreadClosure* tc) const; 140 }; 141 142 #endif // SHARE_GC_Z_ZPAGEALLOCATOR_HPP 143