1 /*
  2  * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
  3  * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
  4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  5  *
  6  * This code is free software; you can redistribute it and/or modify it
  7  * under the terms of the GNU General Public License version 2 only, as
  8  * published by the Free Software Foundation.
  9  *
 10  * This code is distributed in the hope that it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 13  * version 2 for more details (a copy is included in the LICENSE file that
 14  * accompanied this code).
 15  *
 16  * You should have received a copy of the GNU General Public License version
 17  * 2 along with this work; if not, write to the Free Software Foundation,
 18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 19  *
 20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 21  * or visit www.oracle.com if you need additional information or have any
 22  * questions.
 23  *
 24  */
 25 
 26 /*
 27  * @test id=passive
 28  * @summary Check that MX notifications are reported for all cycles
 29  * @library /test/lib /
 30  * @requires vm.gc.Shenandoah
 31  *
 32  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 33  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
 34  *      -XX:+ShenandoahDegeneratedGC
 35  *      TestPauseNotifications
 36  *
 37  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 38  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
 39  *      -XX:-ShenandoahDegeneratedGC
 40  *      TestPauseNotifications
 41  */
 42 
 43 /*
 44  * @test id=aggressive
 45  * @summary Check that MX notifications are reported for all cycles
 46  * @library /test/lib /
 47  * @requires vm.gc.Shenandoah
 48  *
 49  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 50  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
 51  *      TestPauseNotifications
 52  */
 53 
 54 /*
 55  * @test id=adaptive
 56  * @summary Check that MX notifications are reported for all cycles
 57  * @library /test/lib /
 58  * @requires vm.gc.Shenandoah
 59  *
 60  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 61  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
 62  *      TestPauseNotifications
 63  */
 64 
 65 /*
 66  * @test id=static
 67  * @summary Check that MX notifications are reported for all cycles
 68  * @library /test/lib /
 69  * @requires vm.gc.Shenandoah
 70  *
 71  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 72  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
 73  *      TestPauseNotifications
 74  */
 75 
 76 /*
 77  * @test id=compact
 78  * @summary Check that MX notifications are reported for all cycles
 79  * @library /test/lib /
 80  * @requires vm.gc.Shenandoah
 81  *
 82  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 83  *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
 84  *      TestPauseNotifications
 85  */
 86 
 87 /*
 88  * @test id=generational
 89  * @summary Check that MX notifications are reported for all cycles
 90  * @library /test/lib /
 91  * @requires vm.gc.Shenandoah
 92  *
 93  * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
 94  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
 95  *      TestPauseNotifications
 96  */
 97 
 98 import java.util.*;
 99 import java.util.concurrent.atomic.*;
100 import javax.management.*;
101 import java.lang.management.*;
102 import javax.management.openmbean.*;
103 
104 import jdk.test.lib.Utils;
105 
106 import com.sun.management.GarbageCollectionNotificationInfo;
107 
108 public class TestPauseNotifications {
109 
110     static final long HEAP_MB = 128;                           // adjust for test configuration above
111     static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
112 
113     static volatile Object sink;
114 
115     private static boolean isExpectedPauseAction(String action) {
116         return "Init Mark".equals(action) || "Final Mark".equals(action) || "Full GC".equals(action)
117             || "Degenerated GC".equals(action) || "Init Update Refs".equals(action)
118             || "Final Update Refs".equals(action) || "Final Roots".equals(action);
119     }
120 
121     public static void main(String[] args) throws Exception {
122         final long startTimeNanos = System.nanoTime();
123 
124         final AtomicLong pausesDuration = new AtomicLong();
125         final AtomicLong cyclesDuration = new AtomicLong();
126         final AtomicLong pausesCount = new AtomicLong();
127         final AtomicLong cyclesCount = new AtomicLong();
128 
129         NotificationListener listener = new NotificationListener() {
130             @Override
131             public void handleNotification(Notification n, Object o) {
132                 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
133                     GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
134 
135                     System.out.println("Received: " + info.getGcName() + "/" + info.getGcAction());
136 
137 
138                     long d = info.getGcInfo().getDuration();
139 
140                     String name = info.getGcName();
141                     if (name.contains("Shenandoah")) {
142                         if (name.equals("Shenandoah Pauses")) {
143                             pausesCount.incrementAndGet();
144                             pausesDuration.addAndGet(d);
145                             if (!isExpectedPauseAction(info.getGcAction())) {
146                                 throw new IllegalStateException("Unknown action: " + info.getGcAction());
147                             }
148                         } else if (name.equals("Shenandoah Cycles")) {
149                             cyclesCount.incrementAndGet();
150                             cyclesDuration.addAndGet(d);
151                         } else {
152                             throw new IllegalStateException("Unknown name: " + name);
153                         }
154                     }
155                 }
156             }
157         };
158 
159         for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
160             ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
161         }
162 
163         final int size = 100_000;
164         long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
165 
166         for (int c = 0; c < count; c++) {
167             sink = new int[size];
168         }
169 
170         // Look at test timeout to figure out how long we can wait without breaking into timeout.
171         // Default to 1/4 of the remaining time in 1s steps.
172         final long STEP_MS = 1000;
173         long spentTimeNanos = System.nanoTime() - startTimeNanos;
174         long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - (spentTimeNanos / 1_000_000L)) / STEP_MS / 4;
175 
176         long actualPauses = 0;
177         long actualCycles = 0;
178 
179         // Wait until enough notifications are accrued to match minimum boundary.
180         long minExpected = 10;
181 
182         long tries = 0;
183         while (tries++ < maxTries) {
184             actualPauses = pausesCount.get();
185             actualCycles = cyclesCount.get();
186             if (minExpected <= actualPauses && minExpected <= actualCycles) {
187                 // Wait a little bit to catch the lingering notifications.
188                 Thread.sleep(5000);
189                 actualPauses = pausesCount.get();
190                 actualCycles = cyclesCount.get();
191                 break;
192             }
193             Thread.sleep(STEP_MS);
194         }
195 
196         {
197             String msg = "Pauses expected = [" + minExpected + "; +inf], actual = " + actualPauses;
198             if (minExpected <= actualPauses) {
199                 System.out.println(msg);
200             } else {
201                 throw new IllegalStateException(msg);
202             }
203         }
204 
205         {
206             String msg = "Cycles expected = [" + minExpected + "; +inf], actual = " + actualCycles;
207             if (minExpected <= actualCycles) {
208                 System.out.println(msg);
209             } else {
210                 throw new IllegalStateException(msg);
211             }
212         }
213 
214         {
215             long actualPauseDuration = pausesDuration.get();
216             long actualCycleDuration = cyclesDuration.get();
217 
218             String msg = "Pauses duration (" + actualPauseDuration + ") is expected to be not larger than cycles duration (" + actualCycleDuration + ")";
219 
220             if (actualPauseDuration <= actualCycleDuration) {
221                 System.out.println(msg);
222             } else {
223                 throw new IllegalStateException(msg);
224             }
225         }
226     }
227 }
--- EOF ---