1 /* 2 * Copyright (c) 2018, Red Hat, Inc. 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 25 /* 26 * @test TestPauseNotifications 27 * @summary Check that MX notifications are reported for all cycles 28 * @key gc 29 * @requires vm.gc.Shenandoah & !vm.graal.enabled 30 * 31 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 32 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 33 * -XX:+ShenandoahDegeneratedGC 34 * TestPauseNotifications 35 * 36 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 37 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 38 * -XX:-ShenandoahDegeneratedGC 39 * TestPauseNotifications 40 */ 41 42 /* 43 * @test TestPauseNotifications 44 * @summary Check that MX notifications are reported for all cycles 45 * @key gc 46 * @requires vm.gc.Shenandoah & !vm.graal.enabled 47 * 48 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 49 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 50 * TestPauseNotifications 51 * 52 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 53 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive 54 * TestPauseNotifications 55 * 56 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 57 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static 58 * TestPauseNotifications 59 * 60 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 61 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact 62 * TestPauseNotifications 63 */ 64 65 /* 66 * @test TestPauseNotifications 67 * @summary Check that MX notifications are reported for all cycles 68 * @key gc 69 * @requires vm.gc.Shenandoah & !vm.graal.enabled 70 * 71 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 72 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive 73 * TestPauseNotifications 74 * 75 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 76 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu 77 * TestPauseNotifications 78 */ 79 80 import java.util.*; 81 import java.util.concurrent.atomic.*; 82 import javax.management.*; 83 import java.lang.management.*; 84 import javax.management.openmbean.*; 85 86 import com.sun.management.GarbageCollectionNotificationInfo; 87 88 public class TestPauseNotifications { 89 90 static final long HEAP_MB = 128; // adjust for test configuration above 91 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation 92 93 static volatile Object sink; 94 95 public static void main(String[] args) throws Exception { 96 final AtomicLong pausesDuration = new AtomicLong(); 97 final AtomicLong cyclesDuration = new AtomicLong(); 98 99 NotificationListener listener = new NotificationListener() { 100 @Override 101 public void handleNotification(Notification n, Object o) { 102 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) { 103 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData()); 104 105 System.out.println(info.getGcInfo().toString()); 106 System.out.println(info.getGcName()); 107 System.out.println(); 108 109 long d = info.getGcInfo().getDuration(); 110 111 String name = info.getGcName(); 112 if (name.contains("Shenandoah")) { 113 if (name.equals("Shenandoah Pauses")) { 114 pausesDuration.addAndGet(d); 115 } else if (name.equals("Shenandoah Cycles")) { 116 cyclesDuration.addAndGet(d); 117 } else { 118 throw new IllegalStateException("Unknown name: " + name); 119 } 120 } 121 } 122 } 123 }; 124 125 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { 126 ((NotificationEmitter) bean).addNotificationListener(listener, null, null); 127 } 128 129 final int size = 100_000; 130 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size); 131 132 for (int c = 0; c < count; c++) { 133 sink = new int[size]; 134 } 135 136 Thread.sleep(1000); 137 138 long pausesActual = pausesDuration.get(); 139 long cyclesActual = cyclesDuration.get(); 140 141 long minExpected = 1; 142 long maxExpected = Long.MAX_VALUE; 143 144 { 145 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual; 146 if (minExpected < pausesActual && pausesActual < maxExpected) { 147 System.out.println(msg); 148 } else { 149 throw new IllegalStateException(msg); 150 } 151 } 152 153 { 154 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual; 155 if (minExpected < cyclesActual && cyclesActual < maxExpected) { 156 System.out.println(msg); 157 } else { 158 throw new IllegalStateException(msg); 159 } 160 } 161 162 { 163 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")"; 164 if (pausesActual < cyclesActual) { 165 System.out.println(msg); 166 } else { 167 throw new IllegalStateException(msg); 168 } 169 } 170 } 171 }