Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/heapRegionBounds.hpp@a248d0be1309 (annotated)
src/share/vm/gc_implementation/g1/heapRegionBounds.hpp
Mon, 19 Aug 2019 10:11:31 +0200
- author
- neugens
- date
- Mon, 19 Aug 2019 10:11:31 +0200
- changeset 9861
- a248d0be1309
- parent 7137
- 5248357b7113
- permissions
- -rw-r--r--
8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com
| sjohanss@7137 | 1 | /* |
| sjohanss@7137 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| sjohanss@7137 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| sjohanss@7137 | 4 | * |
| sjohanss@7137 | 5 | * This code is free software; you can redistribute it and/or modify it |
| sjohanss@7137 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| sjohanss@7137 | 7 | * published by the Free Software Foundation. |
| sjohanss@7137 | 8 | * |
| sjohanss@7137 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| sjohanss@7137 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| sjohanss@7137 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| sjohanss@7137 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| sjohanss@7137 | 13 | * accompanied this code). |
| sjohanss@7137 | 14 | * |
| sjohanss@7137 | 15 | * You should have received a copy of the GNU General Public License version |
| sjohanss@7137 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| sjohanss@7137 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| sjohanss@7137 | 18 | * |
| sjohanss@7137 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| sjohanss@7137 | 20 | * or visit www.oracle.com if you need additional information or have any |
| sjohanss@7137 | 21 | * questions. |
| sjohanss@7137 | 22 | * |
| sjohanss@7137 | 23 | */ |
| sjohanss@7137 | 24 | |
| sjohanss@7137 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP |
| sjohanss@7137 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP |
| sjohanss@7137 | 27 | |
| sjohanss@7137 | 28 | class HeapRegionBounds : public AllStatic { |
| sjohanss@7137 | 29 | private: |
| sjohanss@7137 | 30 | // Minimum region size; we won't go lower than that. |
| sjohanss@7137 | 31 | // We might want to decrease this in the future, to deal with small |
| sjohanss@7137 | 32 | // heaps a bit more efficiently. |
| sjohanss@7137 | 33 | static const size_t MIN_REGION_SIZE = 1024 * 1024; |
| sjohanss@7137 | 34 | |
| sjohanss@7137 | 35 | // Maximum region size; we don't go higher than that. There's a good |
| sjohanss@7137 | 36 | // reason for having an upper bound. We don't want regions to get too |
| sjohanss@7137 | 37 | // large, otherwise cleanup's effectiveness would decrease as there |
| sjohanss@7137 | 38 | // will be fewer opportunities to find totally empty regions after |
| sjohanss@7137 | 39 | // marking. |
| sjohanss@7137 | 40 | static const size_t MAX_REGION_SIZE = 32 * 1024 * 1024; |
| sjohanss@7137 | 41 | |
| sjohanss@7137 | 42 | // The automatic region size calculation will try to have around this |
| sjohanss@7137 | 43 | // many regions in the heap (based on the min heap size). |
| sjohanss@7137 | 44 | static const size_t TARGET_REGION_NUMBER = 2048; |
| sjohanss@7137 | 45 | |
| sjohanss@7137 | 46 | public: |
| sjohanss@7137 | 47 | static inline size_t min_size(); |
| sjohanss@7137 | 48 | static inline size_t max_size(); |
| sjohanss@7137 | 49 | static inline size_t target_number(); |
| sjohanss@7137 | 50 | }; |
| sjohanss@7137 | 51 | |
| sjohanss@7137 | 52 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_HEAPREGIONBOUNDS_HPP |
