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comparison graal/com.oracle.jvmci.debug.test/src/com/oracle/jvmci/debug/test/DebugTimerTest.java @ 21554:b1530a6cce8c

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renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Tue, 26 May 2015 23:21:15 +0200
parents graal/com.oracle.graal.debug.test/src/com/oracle/graal/debug/test/DebugTimerTest.java@fa75218e3942
children f5b549811bac
comparison
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21553:0910a9497b02 21554:b1530a6cce8c
1 /*
2 * Copyright (c) 2013, 2013, 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 package com.oracle.jvmci.debug.test;
24
25 import static org.junit.Assert.*;
26
27 import java.lang.management.*;
28
29 import org.junit.*;
30
31 import com.oracle.jvmci.debug.*;
32
33
34 public class DebugTimerTest {
35
36 private static final ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
37
38 /**
39 * Actively spins the current thread for at least a given number of milliseconds in such a way
40 * that timers for the current thread keep ticking over.
41 *
42 * @return the number of milliseconds actually spent spinning which is guaranteed to be >=
43 * {@code ms}
44 */
45 private static long spin(long ms) {
46 long start = threadMXBean.getCurrentThreadCpuTime();
47 do {
48 long durationMS = (threadMXBean.getCurrentThreadCpuTime() - start) / 1000;
49 if (durationMS >= ms) {
50 return durationMS;
51 }
52 } while (true);
53 }
54
55 @Test
56 public void test1() {
57 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
58 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
59
60 DebugTimer timerA = Debug.timer("TimerA");
61 DebugTimer timerB = Debug.timer("TimerB");
62
63 long spinA;
64 long spinB;
65
66 try (DebugCloseable a1 = timerA.start()) {
67 spinA = spin(50);
68 try (DebugCloseable b1 = timerB.start()) {
69 spinB = spin(50);
70 }
71 }
72
73 Assert.assertTrue(timerB.getCurrentValue() < timerA.getCurrentValue());
74 if (timerA.getFlat() != null && timerB.getFlat() != null) {
75 assertTrue(spinB >= spinA || timerB.getFlat().getCurrentValue() < timerA.getFlat().getCurrentValue());
76 assertEquals(timerA.getFlat().getCurrentValue(), timerA.getCurrentValue() - timerB.getFlat().getCurrentValue(), 10D);
77 }
78 }
79 }
80
81 @Test
82 public void test2() {
83 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
84 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
85 DebugTimer timerC = Debug.timer("TimerC");
86 try (DebugCloseable c1 = timerC.start()) {
87 spin(50);
88 try (DebugCloseable c2 = timerC.start()) {
89 spin(50);
90 try (DebugCloseable c3 = timerC.start()) {
91 spin(50);
92 try (DebugCloseable c4 = timerC.start()) {
93 spin(50);
94 try (DebugCloseable c5 = timerC.start()) {
95 spin(50);
96 }
97 }
98 }
99 }
100 }
101 if (timerC.getFlat() != null) {
102 assertEquals(timerC.getFlat().getCurrentValue(), timerC.getCurrentValue());
103 }
104 }
105 }
106
107 @Test
108 public void test3() {
109 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
110 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
111
112 DebugTimer timerD = Debug.timer("TimerD");
113 DebugTimer timerE = Debug.timer("TimerE");
114
115 long spinD1;
116 long spinE;
117
118 try (DebugCloseable d1 = timerD.start()) {
119 spinD1 = spin(50);
120 try (DebugCloseable e1 = timerE.start()) {
121 spinE = spin(50);
122 try (DebugCloseable d2 = timerD.start()) {
123 spin(50);
124 try (DebugCloseable d3 = timerD.start()) {
125 spin(50);
126 }
127 }
128 }
129 }
130
131 Assert.assertTrue(timerE.getCurrentValue() < timerD.getCurrentValue());
132 if (timerD.getFlat() != null && timerE.getFlat() != null) {
133 assertTrue(spinE >= spinD1 || timerE.getFlat().getCurrentValue() < timerD.getFlat().getCurrentValue());
134 assertEquals(timerD.getFlat().getCurrentValue(), timerD.getCurrentValue() - timerE.getFlat().getCurrentValue(), 10D);
135 }
136 }
137 }
138 }