1 /* 2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 /* 25 * @test TestPauseNotifications 26 * @summary Check that MX notifications are reported for all cycles 27 * @key gc 28 * @requires vm.gc.Shenandoah & !vm.graal.enabled 29 * 30 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 31 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 32 * -XX:+ShenandoahDegeneratedGC 33 * TestPauseNotifications 34 * 35 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 36 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive 37 * -XX:-ShenandoahDegeneratedGC 38 * TestPauseNotifications 39 */ 40 41 /* 42 * @test TestPauseNotifications 43 * @summary Check that MX notifications are reported for all cycles 44 * @key gc 45 * @requires vm.gc.Shenandoah & !vm.graal.enabled 46 * 47 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 48 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive 49 * TestPauseNotifications 50 * 51 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 52 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive 53 * TestPauseNotifications 54 * 55 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 56 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static 57 * TestPauseNotifications 58 * 59 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 60 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact 61 * TestPauseNotifications 62 */ 63 64 /* 65 * @test TestPauseNotifications 66 * @summary Check that MX notifications are reported for all cycles 67 * @key gc 68 * @requires vm.gc.Shenandoah & !vm.graal.enabled 69 * 70 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 71 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive 72 * TestPauseNotifications 73 * 74 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions 75 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu 76 * TestPauseNotifications 77 */ 78 79 import java.util.*; 80 import java.util.concurrent.atomic.*; 81 import javax.management.*; 82 import java.lang.management.*; 83 import javax.management.openmbean.*; 84 85 import com.sun.management.GarbageCollectionNotificationInfo; 86 87 public class TestPauseNotifications { 88 89 static final long HEAP_MB = 128; // adjust for test configuration above 90 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation 91 92 static volatile Object sink; 93 94 public static void main(String[] args) throws Exception { 95 final AtomicLong pausesDuration = new AtomicLong(); 96 final AtomicLong cyclesDuration = new AtomicLong(); 97 98 NotificationListener listener = new NotificationListener() { 99 @Override 100 public void handleNotification(Notification n, Object o) { 101 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) { 102 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData()); 103 104 System.out.println(info.getGcInfo().toString()); 105 System.out.println(info.getGcName()); 106 System.out.println(); 107 108 long d = info.getGcInfo().getDuration(); 109 110 String name = info.getGcName(); 111 if (name.contains("Shenandoah")) { 112 if (name.equals("Shenandoah Pauses")) { 113 pausesDuration.addAndGet(d); 114 } else if (name.equals("Shenandoah Cycles")) { 115 cyclesDuration.addAndGet(d); 116 } else { 117 throw new IllegalStateException("Unknown name: " + name); 118 } 119 } 120 } 121 } 122 }; 123 124 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { 125 ((NotificationEmitter) bean).addNotificationListener(listener, null, null); 126 } 127 128 final int size = 100_000; 129 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size); 130 131 for (int c = 0; c < count; c++) { 132 sink = new int[size]; 133 } 134 135 Thread.sleep(1000); 136 137 long pausesActual = pausesDuration.get(); 138 long cyclesActual = cyclesDuration.get(); 139 140 long minExpected = 1; 141 long maxExpected = Long.MAX_VALUE; 142 143 { 144 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual; 145 if (minExpected < pausesActual && pausesActual < maxExpected) { 146 System.out.println(msg); 147 } else { 148 throw new IllegalStateException(msg); 149 } 150 } 151 152 { 153 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual; 154 if (minExpected < cyclesActual && cyclesActual < maxExpected) { 155 System.out.println(msg); 156 } else { 157 throw new IllegalStateException(msg); 158 } 159 } 160 161 { 162 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")"; 163 if (pausesActual < cyclesActual) { 164 System.out.println(msg); 165 } else { 166 throw new IllegalStateException(msg); 167 } 168 } 169 } 170 }