Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ObjectHistogram.java @ 7587:4a916f2ce331
8003985: Support @Contended Annotation - JEP 142
Summary: HotSpot changes to support @Contended annotation.
Reviewed-by: coleenp, kvn, jrose
Contributed-by: Aleksey Shipilev <aleksey.shipilev@oracle.com>
author | jwilhelm |
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date | Mon, 14 Jan 2013 15:17:47 +0100 |
parents | c18cbe5936b8 |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2008, 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 | |
25 package sun.jvm.hotspot.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 | |
30 public class ObjectHistogram implements HeapVisitor { | |
31 | |
32 public ObjectHistogram() { map = new HashMap(); } | |
33 | |
34 private HashMap map; | |
35 | |
36 public void prologue(long size) {} | |
37 | |
38 public boolean doObj(Oop obj) { | |
39 Klass klass = obj.getKlass(); | |
40 if (!map.containsKey(klass)) map.put(klass, new ObjectHistogramElement(klass)); | |
41 ((ObjectHistogramElement) map.get(klass)).updateWith(obj); | |
42 return false; | |
43 } | |
44 | |
45 public void epilogue() {} | |
46 | |
47 /** Call this after the iteration is complete to obtain the | |
48 ObjectHistogramElements in descending order of total heap size | |
49 consumed in the form of a List<ObjectHistogramElement>. */ | |
50 public List getElements() { | |
51 List list = new ArrayList(); | |
52 list.addAll(map.values()); | |
53 Collections.sort(list, new Comparator() { | |
54 public int compare(Object o1, Object o2) { | |
55 return ((ObjectHistogramElement) o1).compare((ObjectHistogramElement) o2); | |
56 } | |
57 }); | |
58 return list; | |
59 } | |
60 | |
61 public void print() { printOn(System.out); } | |
62 | |
63 public void printOn(PrintStream tty) { | |
64 List list = getElements(); | |
65 ObjectHistogramElement.titleOn(tty); | |
66 Iterator iterator = list.listIterator(); | |
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67 int num=0; |
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68 int totalCount=0; |
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69 int totalSize=0; |
0 | 70 while (iterator.hasNext()) { |
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71 ObjectHistogramElement el = (ObjectHistogramElement) iterator.next(); |
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72 num++; |
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73 totalCount+=el.getCount(); |
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74 totalSize+=el.getSize(); |
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75 tty.print(num + ":" + "\t\t"); |
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76 el.printOn(tty); |
0 | 77 } |
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78 tty.println("Total : " + "\t" + totalCount + "\t" + totalSize); |
0 | 79 } |
80 } |