1 /* 2 * Copyright (c) 2017, 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_ZRELOCATIONSETSELECTOR_HPP 25 #define SHARE_GC_Z_ZRELOCATIONSETSELECTOR_HPP 26 27 #include "gc/z/zArray.hpp" 28 #include "memory/allocation.hpp" 29 30 class ZPage; 31 class ZRelocationSet; 32 33 class ZRelocationSetSelectorGroup { 34 private: 35 const char* const _name; 36 const size_t _page_size; 37 const size_t _object_size_limit; 38 const size_t _fragmentation_limit; 39 40 ZArray<ZPage*> _registered_pages; 41 ZPage** _sorted_pages; 42 size_t _nselected; 43 size_t _relocating; 44 45 void semi_sort(); 46 47 public: 48 ZRelocationSetSelectorGroup(const char* name, 49 size_t page_size, 50 size_t object_size_limit); 51 ~ZRelocationSetSelectorGroup(); 52 53 void register_live_page(ZPage* page, size_t garbage); 54 void select(); 55 56 ZPage* const* selected() const; 57 size_t nselected() const; 58 size_t relocating() const; 59 }; 60 61 class ZRelocationSetSelector : public StackObj { 62 private: 63 ZRelocationSetSelectorGroup _small; 64 ZRelocationSetSelectorGroup _medium; 65 size_t _live; 66 size_t _garbage; 67 68 public: 69 ZRelocationSetSelector(); 70 71 void register_live_page(ZPage* page); 72 void register_garbage_page(ZPage* page); 73 void select(ZRelocationSet* relocation_set); 74 75 size_t live() const; 76 size_t garbage() const; 77 size_t relocating() const; 78 }; 79 80 #endif // SHARE_GC_Z_ZRELOCATIONSETSELECTOR_HPP