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
29 *
30 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive -XX:+ShenandoahDegeneratedGC TestPauseNotifications
31 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=passive -XX:-ShenandoahDegeneratedGC TestPauseNotifications
32 *
33 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive TestPauseNotifications
34 *
35 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive TestPauseNotifications
36 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static TestPauseNotifications
37 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact TestPauseNotifications
38 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=traversal TestPauseNotifications
39 */
40
41 import java.util.*;
42 import java.util.concurrent.atomic.*;
43 import javax.management.*;
44 import java.lang.management.*;
45 import javax.management.openmbean.*;
46
47 import com.sun.management.GarbageCollectionNotificationInfo;
48
49 public class TestPauseNotifications {
50
51 static final long HEAP_MB = 128; // adjust for test configuration above
52 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation
53
54 static volatile Object sink;
55
56 public static void main(String[] args) throws Exception {
57 final AtomicLong pausesDuration = new AtomicLong();
58 final AtomicLong cyclesDuration = new AtomicLong();
59
60 NotificationListener listener = new NotificationListener() {
61 @Override
62 public void handleNotification(Notification n, Object o) {
63 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
64 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
65
66 System.out.println(info.getGcInfo().toString());
67 System.out.println(info.getGcName());
68 System.out.println();
69
70 long d = info.getGcInfo().getDuration();
71
72 String name = info.getGcName();
73 if (name.contains("Shenandoah")) {
74 if (name.equals("Shenandoah Pauses")) {
75 pausesDuration.addAndGet(d);
76 } else if (name.equals("Shenandoah Cycles")) {
77 cyclesDuration.addAndGet(d);
78 } else {
79 throw new IllegalStateException("Unknown name: " + name);
80 }
81 }
82 }
83 }
84 };
85
86 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
87 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
88 }
89
90 final int size = 100_000;
91 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
92
93 for (int c = 0; c < count; c++) {
94 sink = new int[size];
95 }
96
97 Thread.sleep(1000);
98
99 long pausesActual = pausesDuration.get();
100 long cyclesActual = cyclesDuration.get();
101
102 long minExpected = 1;
103 long maxExpected = Long.MAX_VALUE;
104
105 {
106 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual;
107 if (minExpected < pausesActual && pausesActual < maxExpected) {
108 System.out.println(msg);
109 } else {
110 throw new IllegalStateException(msg);
111 }
112 }
113
114 {
115 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual;
116 if (minExpected < cyclesActual && cyclesActual < maxExpected) {
117 System.out.println(msg);
118 } else {
119 throw new IllegalStateException(msg);
120 }
121 }
122
123 {
124 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")";
125 if (pausesActual < cyclesActual) {
126 System.out.println(msg);
127 } else {
128 throw new IllegalStateException(msg);
129 }
130 }
131 }
132 }