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 /*
66 * @test TestPauseNotifications
67 * @summary Check that MX notifications are reported for all cycles
68 * @key gc
69 * @requires vm.gc.Shenandoah & !vm.graal.enabled
70 *
71 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
72 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
73 * TestPauseNotifications
74 *
75 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
76 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
77 * TestPauseNotifications
78 */
79
80 import java.util.*;
81 import java.util.concurrent.atomic.*;
82 import javax.management.*;
83 import java.lang.management.*;
84 import javax.management.openmbean.*;
85
86 import com.sun.management.GarbageCollectionNotificationInfo;
87
88 public class TestPauseNotifications {
89
90 static final long HEAP_MB = 128; // adjust for test configuration above
91 static final long TARGET_MB = Long.getLong("target", 8_000); // 8 Gb allocation
92
93 static volatile Object sink;
94
95 public static void main(String[] args) throws Exception {
96 final AtomicLong pausesDuration = new AtomicLong();
97 final AtomicLong cyclesDuration = new AtomicLong();
98
99 NotificationListener listener = new NotificationListener() {
100 @Override
101 public void handleNotification(Notification n, Object o) {
102 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
103 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
104
105 System.out.println(info.getGcInfo().toString());
106 System.out.println(info.getGcName());
107 System.out.println();
108
109 long d = info.getGcInfo().getDuration();
110
111 String name = info.getGcName();
112 if (name.contains("Shenandoah")) {
113 if (name.equals("Shenandoah Pauses")) {
114 pausesDuration.addAndGet(d);
115 } else if (name.equals("Shenandoah Cycles")) {
116 cyclesDuration.addAndGet(d);
117 } else {
118 throw new IllegalStateException("Unknown name: " + name);
119 }
120 }
121 }
122 }
123 };
124
125 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
126 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
127 }
128
129 final int size = 100_000;
130 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
131
132 for (int c = 0; c < count; c++) {
133 sink = new int[size];
134 }
135
136 Thread.sleep(1000);
137
138 long pausesActual = pausesDuration.get();
139 long cyclesActual = cyclesDuration.get();
140
141 long minExpected = 1;
142 long maxExpected = Long.MAX_VALUE;
143
144 {
145 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual;
146 if (minExpected < pausesActual && pausesActual < maxExpected) {
147 System.out.println(msg);
148 } else {
149 throw new IllegalStateException(msg);
150 }
151 }
152
153 {
154 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual;
155 if (minExpected < cyclesActual && cyclesActual < maxExpected) {
156 System.out.println(msg);
157 } else {
158 throw new IllegalStateException(msg);
159 }
160 }
161
162 {
163 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")";
164 if (pausesActual < cyclesActual) {
165 System.out.println(msg);
166 } else {
167 throw new IllegalStateException(msg);
168 }
169 }
170 }
171 }