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 }