Mercurial > hg > graal-jvmci-8
annotate src/share/vm/memory/referencePolicy.cpp @ 10241:d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
Summary: Make processing of minimum, initial and maximum heap size more intiutive by removing previous limitations on allowed values, and make error reporting consistent. Further, fix errors in ergonomic heap sizing.
Reviewed-by: johnc, jwilhelm, tamao
author | tschatzl |
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date | Mon, 06 May 2013 17:19:42 +0200 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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. | |
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44 bool LRUCurrentHeapPolicy::should_clear_reference(oop p, |
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45 jlong timestamp_clock) { |
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46 jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); |
0 | 47 assert(interval >= 0, "Sanity check"); |
48 | |
49 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
50 if(interval <= _max_interval) { | |
51 return false; | |
52 } | |
53 | |
54 return true; | |
55 } | |
56 | |
57 /////////////////////// MaxHeap ////////////////////// | |
58 | |
59 LRUMaxHeapPolicy::LRUMaxHeapPolicy() { | |
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60 setup(); |
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61 } |
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62 |
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63 // Capture state (of-the-VM) information needed to evaluate the policy |
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64 void LRUMaxHeapPolicy::setup() { |
0 | 65 size_t max_heap = MaxHeapSize; |
66 max_heap -= Universe::get_heap_used_at_last_gc(); | |
67 max_heap /= M; | |
68 | |
69 _max_interval = max_heap * SoftRefLRUPolicyMSPerMB; | |
70 assert(_max_interval >= 0,"Sanity check"); | |
71 } | |
72 | |
73 // The oop passed in is the SoftReference object, and not | |
74 // the object the SoftReference points to. | |
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75 bool LRUMaxHeapPolicy::should_clear_reference(oop p, |
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76 jlong timestamp_clock) { |
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77 jlong interval = timestamp_clock - java_lang_ref_SoftReference::timestamp(p); |
0 | 78 assert(interval >= 0, "Sanity check"); |
79 | |
80 // The interval will be zero if the ref was accessed since the last scavenge/gc. | |
81 if(interval <= _max_interval) { | |
82 return false; | |
83 } | |
84 | |
85 return true; | |
86 } |