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annotate 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
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1 /*
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2 * Copyright (c) 2013, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 */
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23 package com.oracle.jvmci.debug.test;
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24
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25 import static org.junit.Assert.*;
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26
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27 import java.lang.management.*;
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28
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29 import org.junit.*;
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30
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31 import com.oracle.jvmci.debug.*;
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33
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34 public class DebugTimerTest {
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35
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36 private static final ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
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37
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38 /**
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39 * Actively spins the current thread for at least a given number of milliseconds in such a way
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40 * that timers for the current thread keep ticking over.
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41 *
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42 * @return the number of milliseconds actually spent spinning which is guaranteed to be >=
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43 * {@code ms}
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44 */
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45 private static long spin(long ms) {
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46 long start = threadMXBean.getCurrentThreadCpuTime();
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47 do {
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48 long durationMS = (threadMXBean.getCurrentThreadCpuTime() - start) / 1000;
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49 if (durationMS >= ms) {
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50 return durationMS;
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51 }
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52 } while (true);
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53 }
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54
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55 @Test
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56 public void test1() {
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57 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
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58 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
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59
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60 DebugTimer timerA = Debug.timer("TimerA");
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61 DebugTimer timerB = Debug.timer("TimerB");
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62
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63 long spinA;
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64 long spinB;
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65
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66 try (DebugCloseable a1 = timerA.start()) {
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67 spinA = spin(50);
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68 try (DebugCloseable b1 = timerB.start()) {
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69 spinB = spin(50);
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70 }
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71 }
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72
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73 Assert.assertTrue(timerB.getCurrentValue() < timerA.getCurrentValue());
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74 if (timerA.getFlat() != null && timerB.getFlat() != null) {
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75 assertTrue(spinB >= spinA || timerB.getFlat().getCurrentValue() < timerA.getFlat().getCurrentValue());
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76 assertEquals(timerA.getFlat().getCurrentValue(), timerA.getCurrentValue() - timerB.getFlat().getCurrentValue(), 10D);
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77 }
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78 }
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79 }
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80
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81 @Test
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82 public void test2() {
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83 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
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84 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
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85 DebugTimer timerC = Debug.timer("TimerC");
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86 try (DebugCloseable c1 = timerC.start()) {
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87 spin(50);
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88 try (DebugCloseable c2 = timerC.start()) {
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89 spin(50);
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90 try (DebugCloseable c3 = timerC.start()) {
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91 spin(50);
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92 try (DebugCloseable c4 = timerC.start()) {
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93 spin(50);
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94 try (DebugCloseable c5 = timerC.start()) {
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95 spin(50);
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96 }
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97 }
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98 }
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99 }
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100 }
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101 if (timerC.getFlat() != null) {
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102 assertEquals(timerC.getFlat().getCurrentValue(), timerC.getCurrentValue());
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103 }
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104 }
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105 }
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106
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107 @Test
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108 public void test3() {
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109 DebugConfig debugConfig = Debug.fixedConfig(0, 0, false, false, true, false, null, null, System.out);
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110 try (DebugConfigScope dcs = new DebugConfigScope(debugConfig); Debug.Scope s = Debug.scope("DebugTimerTest")) {
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111
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112 DebugTimer timerD = Debug.timer("TimerD");
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113 DebugTimer timerE = Debug.timer("TimerE");
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114
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115 long spinD1;
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116 long spinE;
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117
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118 try (DebugCloseable d1 = timerD.start()) {
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119 spinD1 = spin(50);
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120 try (DebugCloseable e1 = timerE.start()) {
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121 spinE = spin(50);
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122 try (DebugCloseable d2 = timerD.start()) {
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123 spin(50);
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124 try (DebugCloseable d3 = timerD.start()) {
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125 spin(50);
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126 }
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127 }
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128 }
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129 }
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130
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131 Assert.assertTrue(timerE.getCurrentValue() < timerD.getCurrentValue());
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132 if (timerD.getFlat() != null && timerE.getFlat() != null) {
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133 assertTrue(spinE >= spinD1 || timerE.getFlat().getCurrentValue() < timerD.getFlat().getCurrentValue());
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134 assertEquals(timerD.getFlat().getCurrentValue(), timerD.getCurrentValue() - timerE.getFlat().getCurrentValue(), 10D);
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135 }
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136 }
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137 }
2cb007e99ed0 added support for getting the flat time from a DebugTimer
Doug Simon <doug.simon@oracle.com>
parents:
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