Wed, 26 Jun 2013 16:58:37 +0200
8013590: NPG: Add a memory pool MXBean for Metaspace
Reviewed-by: jmasa, mgerdin
duke@435 | 1 | /* |
mikael@4153 | 2 | * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #ifndef SHARE_VM_MEMORY_REFERENCEPOLICY_HPP |
stefank@2314 | 26 | #define SHARE_VM_MEMORY_REFERENCEPOLICY_HPP |
stefank@2314 | 27 | |
duke@435 | 28 | // referencePolicy is used to determine when soft reference objects |
duke@435 | 29 | // should be cleared. |
duke@435 | 30 | |
duke@435 | 31 | |
zgu@3900 | 32 | class ReferencePolicy : public CHeapObj<mtGC> { |
duke@435 | 33 | public: |
johnc@3188 | 34 | virtual bool should_clear_reference(oop p, jlong timestamp_clock) { |
johnc@3188 | 35 | ShouldNotReachHere(); |
johnc@3188 | 36 | return true; |
johnc@3188 | 37 | } |
johnc@3188 | 38 | |
ysr@888 | 39 | // Capture state (of-the-VM) information needed to evaluate the policy |
ysr@892 | 40 | virtual void setup() { /* do nothing */ } |
duke@435 | 41 | }; |
duke@435 | 42 | |
duke@435 | 43 | class NeverClearPolicy : public ReferencePolicy { |
duke@435 | 44 | public: |
johnc@3188 | 45 | virtual bool should_clear_reference(oop p, jlong timestamp_clock) { |
johnc@3188 | 46 | return false; |
johnc@3188 | 47 | } |
duke@435 | 48 | }; |
duke@435 | 49 | |
duke@435 | 50 | class AlwaysClearPolicy : public ReferencePolicy { |
duke@435 | 51 | public: |
johnc@3188 | 52 | virtual bool should_clear_reference(oop p, jlong timestamp_clock) { |
johnc@3188 | 53 | return true; |
johnc@3188 | 54 | } |
duke@435 | 55 | }; |
duke@435 | 56 | |
duke@435 | 57 | class LRUCurrentHeapPolicy : public ReferencePolicy { |
duke@435 | 58 | private: |
duke@435 | 59 | jlong _max_interval; |
duke@435 | 60 | |
duke@435 | 61 | public: |
duke@435 | 62 | LRUCurrentHeapPolicy(); |
duke@435 | 63 | |
ysr@888 | 64 | // Capture state (of-the-VM) information needed to evaluate the policy |
ysr@892 | 65 | void setup(); |
johnc@3188 | 66 | virtual bool should_clear_reference(oop p, jlong timestamp_clock); |
duke@435 | 67 | }; |
duke@435 | 68 | |
duke@435 | 69 | class LRUMaxHeapPolicy : public ReferencePolicy { |
duke@435 | 70 | private: |
duke@435 | 71 | jlong _max_interval; |
duke@435 | 72 | |
duke@435 | 73 | public: |
duke@435 | 74 | LRUMaxHeapPolicy(); |
duke@435 | 75 | |
ysr@888 | 76 | // Capture state (of-the-VM) information needed to evaluate the policy |
ysr@892 | 77 | void setup(); |
johnc@3188 | 78 | virtual bool should_clear_reference(oop p, jlong timestamp_clock); |
duke@435 | 79 | }; |
stefank@2314 | 80 | |
stefank@2314 | 81 | #endif // SHARE_VM_MEMORY_REFERENCEPOLICY_HPP |