Mercurial > hg > truffle

comparison visualizer/HierarchicalLayout/src/com/sun/hotspot/igv/hierarchicallayout/Timing.java @ 4512:015fb895586b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Moved visualizer to new directory.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 07 Feb 2012 22:41:09 +0100
parents
children
comparison
equal deleted inserted replaced
4511:6cb549627941 4512:015fb895586b
1 /*
2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24 package com.sun.hotspot.igv.hierarchicallayout;
25
26 /**
27 *
28 * @author Thomas Wuerthinger
29 */
30 public class Timing {
31
32 private long lastValue;
33 private long sum;
34 private String name;
35
36 public Timing(String name) {
37 this.name = name;
38 }
39
40 @Override
41 public String toString() {
42 long val = sum;
43 if (lastValue != 0) {
44 // Timer running
45 long newValue = System.nanoTime();
46 val += (newValue - lastValue);
47 }
48 return "Timing for " + name + " is: " + val / 1000000 + " ms";
49 }
50
51 public void print() {
52 System.out.println(toString());
53 }
54
55 public void start() {
56 lastValue = System.nanoTime();
57 }
58
59 public void stop() {
60 if (lastValue == 0) {
61 throw new IllegalStateException("You must call start before stop");
62 }
63 long newValue = System.nanoTime();
64 sum += newValue - lastValue;
65 lastValue = 0;
66 }
67 }