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 * @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 * @requires vm.gc.Shenandoah & !vm.graal.enabled
45 *
46 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
47 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
48 * TestPauseNotifications
49 *
50 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
51 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
52 * TestPauseNotifications
53 *
54 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
55 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
56 * TestPauseNotifications
57 *
58 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
59 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
60 * TestPauseNotifications
61 */
62
63 /*
64 * @test TestPauseNotifications
65 * @summary Check that MX notifications are reported for all cycles
66 * @requires vm.gc.Shenandoah & !vm.graal.enabled
67 *
68 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
69 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
70 * TestPauseNotifications
71 *
72 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
73 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
74 * TestPauseNotifications
75 */
76
77 import java.util.*;
78 import java.util.concurrent.atomic.*;
79 import javax.management.*;
80 import java.lang.management.*;
81 import javax.management.openmbean.*;
82
83 import com.sun.management.GarbageCollectionNotificationInfo;
84
85 public class TestPauseNotifications {
86
87 static final long HEAP_MB = 128; // adjust for test configuration above
88 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation
89
90 static volatile Object sink;
91
92 public static void main(String[] args) throws Exception {
93 final AtomicLong pausesDuration = new AtomicLong();
94 final AtomicLong cyclesDuration = new AtomicLong();
95
96 NotificationListener listener = new NotificationListener() {
97 @Override
98 public void handleNotification(Notification n, Object o) {
99 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
100 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
101
102 System.out.println(info.getGcInfo().toString());
103 System.out.println(info.getGcName());
104 System.out.println();
105
106 long d = info.getGcInfo().getDuration();
107
108 String name = info.getGcName();
109 if (name.contains("Shenandoah")) {
110 if (name.equals("Shenandoah Pauses")) {
111 pausesDuration.addAndGet(d);
112 } else if (name.equals("Shenandoah Cycles")) {
113 cyclesDuration.addAndGet(d);
114 } else {
115 throw new IllegalStateException("Unknown name: " + name);
116 }
117 }
118 }
119 }
120 };
121
122 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
123 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
124 }
125
126 final int size = 100_000;
127 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
128
129 for (int c = 0; c < count; c++) {
130 sink = new int[size];
131 }
132
133 Thread.sleep(1000);
134
135 long pausesActual = pausesDuration.get();
136 long cyclesActual = cyclesDuration.get();
137
138 long minExpected = 1;
139 long maxExpected = Long.MAX_VALUE;
140
141 {
142 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual;
143 if (minExpected < pausesActual && pausesActual < maxExpected) {
144 System.out.println(msg);
145 } else {
146 throw new IllegalStateException(msg);
147 }
148 }
149
150 {
151 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual;
152 if (minExpected < cyclesActual && cyclesActual < maxExpected) {
153 System.out.println(msg);
154 } else {
155 throw new IllegalStateException(msg);
156 }
157 }
158
159 {
160 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")";
161 if (pausesActual < cyclesActual) {
162 System.out.println(msg);
163 } else {
164 throw new IllegalStateException(msg);
165 }
166 }
167 }
168 }