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 import java.util.*;
66 import java.util.concurrent.atomic.*;
67 import javax.management.*;
68 import java.lang.management.*;
69 import javax.management.openmbean.*;
70
71 import com.sun.management.GarbageCollectionNotificationInfo;
72
73 public class TestPauseNotifications {
74
75 static final long HEAP_MB = 128; // adjust for test configuration above
76 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation
77
78 static volatile Object sink;
79
80 public static void main(String[] args) throws Exception {
81 final AtomicLong pausesDuration = new AtomicLong();
82 final AtomicLong cyclesDuration = new AtomicLong();
83
84 NotificationListener listener = new NotificationListener() {
85 @Override
86 public void handleNotification(Notification n, Object o) {
87 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
88 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
89
90 System.out.println(info.getGcInfo().toString());
91 System.out.println(info.getGcName());
92 System.out.println();
93
94 long d = info.getGcInfo().getDuration();
95
96 String name = info.getGcName();
97 if (name.contains("Shenandoah")) {
98 if (name.equals("Shenandoah Pauses")) {
99 pausesDuration.addAndGet(d);
100 } else if (name.equals("Shenandoah Cycles")) {
101 cyclesDuration.addAndGet(d);
102 } else {
103 throw new IllegalStateException("Unknown name: " + name);
104 }
105 }
106 }
107 }
108 };
109
110 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
111 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
112 }
113
114 final int size = 100_000;
115 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
116
117 for (int c = 0; c < count; c++) {
118 sink = new int[size];
119 }
120
121 Thread.sleep(1000);
122
123 long pausesActual = pausesDuration.get();
124 long cyclesActual = cyclesDuration.get();
125
126 long minExpected = 1;
127 long maxExpected = Long.MAX_VALUE;
128
129 {
130 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual;
131 if (minExpected < pausesActual && pausesActual < maxExpected) {
132 System.out.println(msg);
133 } else {
134 throw new IllegalStateException(msg);
135 }
136 }
137
138 {
139 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual;
140 if (minExpected < cyclesActual && cyclesActual < maxExpected) {
141 System.out.println(msg);
142 } else {
143 throw new IllegalStateException(msg);
144 }
145 }
146
147 {
148 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")";
149 if (pausesActual < cyclesActual) {
150 System.out.println(msg);
151 } else {
152 throw new IllegalStateException(msg);
153 }
154 }
155 }
156 }