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 *
29 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
30 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
31 * -XX:+ShenandoahDegeneratedGC
32 * TestPauseNotifications
33 *
34 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
35 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
36 * -XX:-ShenandoahDegeneratedGC
37 * TestPauseNotifications
38 */
39
40 /*
41 * @test TestPauseNotifications
42 * @summary Check that MX notifications are reported for all cycles
43 * @key gc
44 *
45 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
46 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
47 * TestPauseNotifications
48 */
49
50 /*
51 * @test TestPauseNotifications
52 * @summary Check that MX notifications are reported for all cycles
53 * @key gc
54 *
55 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
56 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
57 * TestPauseNotifications
58 */
59
60 /*
61 * @test TestPauseNotifications
62 * @summary Check that MX notifications are reported for all cycles
63 * @key gc
64 *
65 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
66 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
67 * TestPauseNotifications
68 */
69
70 /*
71 * @test TestPauseNotifications
72 * @summary Check that MX notifications are reported for all cycles
73 * @key gc
74 *
75 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
76 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
77 * TestPauseNotifications
78 */
79
80 /*
81 * @test TestPauseNotifications
82 * @summary Check that MX notifications are reported for all cycles
83 * @key gc
84 *
85 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
86 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
87 * TestPauseNotifications
88 *
89 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
90 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
91 * TestPauseNotifications
92 */
93
94 import java.util.*;
95 import java.util.concurrent.atomic.*;
96 import javax.management.*;
97 import java.lang.management.*;
98 import javax.management.openmbean.*;
99 import com.sun.management.GarbageCollectionNotificationInfo;
100
101 public class TestPauseNotifications {
102
103 static final long HEAP_MB = 128; // adjust for test configuration above
104 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
105
106 static volatile Object sink;
107
108 public static void main(String[] args) throws Exception {
109 final AtomicLong pausesDuration = new AtomicLong();
110 final AtomicLong cyclesDuration = new AtomicLong();
111
112 NotificationListener listener = new NotificationListener() {
113 @Override
114 public void handleNotification(Notification n, Object o) {
115 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
116 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
117
118 long d = info.getGcInfo().getDuration();
119
120 String name = info.getGcName();
121 if (name.contains("Shenandoah")) {
122 if (name.equals("Shenandoah Pauses")) {
123 pausesDuration.addAndGet(d);
124 } else if (name.equals("Shenandoah Cycles")) {
125 cyclesDuration.addAndGet(d);
126 } else {
127 throw new IllegalStateException("Unknown name: " + name);
128 }
129 }
130 }
131 }
132 };
133
134 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
135 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
136 }
137
138 final int size = 100_000;
139 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
140
141 for (int c = 0; c < count; c++) {
142 sink = new int[size];
143 }
144
145 // Wait until notifications start arriving, and then wait some more
146 // to catch the ones arriving late.
147 while (pausesDuration.get() == 0) {
148 Thread.sleep(1000);
149 }
150 Thread.sleep(5000);
151
152 long pausesActual = pausesDuration.get();
153 long cyclesActual = cyclesDuration.get();
154
155 long minExpected = 1;
156 long maxExpected = Long.MAX_VALUE;
157
158 {
159 String msg = "Pauses expected = [" + minExpected + "; " + maxExpected + "], actual = " + pausesActual;
160 if (minExpected <= pausesActual && pausesActual <= maxExpected) {
161 System.out.println(msg);
162 } else {
163 throw new IllegalStateException(msg);
164 }
165 }
166
167 {
168 String msg = "Cycles expected = [" + minExpected + "; " + maxExpected + "], actual = " + cyclesActual;
169 if (minExpected <= cyclesActual && cyclesActual <= maxExpected) {
170 System.out.println(msg);
171 } else {
172 throw new IllegalStateException(msg);
173 }
174 }
175
176 {
177 String msg = "Cycle duration (" + cyclesActual + "), pause duration (" + pausesActual + ")";
178 if (pausesActual <= cyclesActual) {
179 System.out.println(msg);
180 } else {
181 throw new IllegalStateException(msg);
182 }
183 }
184 }
185 }