Mercurial > hg > truffle
annotate src/share/vm/memory/referencePolicy.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children | d1bdeef3e3e2 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/javaClasses.hpp" | |
| 27 #include "memory/referencePolicy.hpp" | |
| 28 #include "memory/universe.hpp" | |
| 29 #include "runtime/arguments.hpp" | |
| 30 #include "runtime/globals.hpp" | |
| 0 | 31 |
| 32 LRUCurrentHeapPolicy::LRUCurrentHeapPolicy() { | |
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33 setup(); |
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34 } |
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35 |
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36 // Capture state (of-the-VM) information needed to evaluate the policy |
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37 void LRUCurrentHeapPolicy::setup() { |
| 0 | 38 _max_interval = (Universe::get_heap_free_at_last_gc() / M) * SoftRefLRUPolicyMSPerMB; |
| 39 assert(_max_interval >= 0,"Sanity check"); | |
| 40 } | |
| 41 | |
| 42 // The oop passed in is the SoftReference object, and not | |
| 43 // the object the SoftReference points to. | |
| 44 bool LRUCurrentHeapPolicy::should_clear_reference(oop p) { | |
| 45 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
| 46 assert(interval >= 0, "Sanity check"); | |
| 47 | |
| 48 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
| 49 if(interval <= _max_interval) { | |
| 50 return false; | |
| 51 } | |
| 52 | |
| 53 return true; | |
| 54 } | |
| 55 | |
| 56 /////////////////////// MaxHeap ////////////////////// | |
| 57 | |
| 58 LRUMaxHeapPolicy::LRUMaxHeapPolicy() { | |
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59 setup(); |
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60 } |
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61 |
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62 // Capture state (of-the-VM) information needed to evaluate the policy |
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63 void LRUMaxHeapPolicy::setup() { |
| 0 | 64 size_t max_heap = MaxHeapSize; |
| 65 max_heap -= Universe::get_heap_used_at_last_gc(); | |
| 66 max_heap /= M; | |
| 67 | |
| 68 _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; | |
| 69 assert(_max_interval >= 0,"Sanity check"); | |
| 70 } | |
| 71 | |
| 72 // The oop passed in is the SoftReference object, and not | |
| 73 // the object the SoftReference points to. | |
| 74 bool LRUMaxHeapPolicy::should_clear_reference(oop p) { | |
| 75 jlong interval = java_lang_ref_SoftReference::clock() - java_lang_ref_SoftReference::timestamp(p); | |
| 76 assert(interval >= 0, "Sanity check"); | |
| 77 | |
| 78 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
| 79 if(interval <= _max_interval) { | |
| 80 return false; | |
| 81 } | |
| 82 | |
| 83 return true; | |
| 84 } |