1 /*
2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved.
3 * Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 /*
27 * @test id=passive
28 * @summary Check that MX notifications are reported for all cycles
29 * @library /test/lib /
30 * @requires vm.gc.Shenandoah
31 *
32 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
33 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
34 * -XX:+ShenandoahDegeneratedGC
35 * TestPauseNotifications
36 *
37 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
38 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
39 * -XX:-ShenandoahDegeneratedGC
40 * TestPauseNotifications
41 */
42
43 /*
44 * @test id=aggressive
45 * @summary Check that MX notifications are reported for all cycles
46 * @library /test/lib /
47 * @requires vm.gc.Shenandoah
48 *
49 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
50 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
51 * TestPauseNotifications
52 */
53
54 /*
55 * @test id=adaptive
56 * @summary Check that MX notifications are reported for all cycles
57 * @library /test/lib /
58 * @requires vm.gc.Shenandoah
59 *
60 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
61 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
62 * TestPauseNotifications
63 */
64
65 /*
66 * @test id=static
67 * @summary Check that MX notifications are reported for all cycles
68 * @library /test/lib /
69 * @requires vm.gc.Shenandoah
70 *
71 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
72 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
73 * TestPauseNotifications
74 */
75
76 /*
77 * @test id=compact
78 * @summary Check that MX notifications are reported for all cycles
79 * @library /test/lib /
80 * @requires vm.gc.Shenandoah
81 *
82 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
83 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
84 * TestPauseNotifications
85 */
86
87 /*
88 * @test id=generational
89 * @summary Check that MX notifications are reported for all cycles
90 * @library /test/lib /
91 * @requires vm.gc.Shenandoah
92 *
93 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
94 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
95 * TestPauseNotifications
96 */
97
98 import java.util.*;
99 import java.util.concurrent.atomic.*;
100 import javax.management.*;
101 import java.lang.management.*;
102 import javax.management.openmbean.*;
103
104 import jdk.test.lib.Utils;
105
106 import com.sun.management.GarbageCollectionNotificationInfo;
107
108 public class TestPauseNotifications {
109
110 static final long HEAP_MB = 128; // adjust for test configuration above
111 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
112
113 static volatile Object sink;
114
115 private static boolean isExpectedPauseAction(String action) {
116 return "Init Mark".equals(action) || "Final Mark".equals(action) || "Full GC".equals(action)
117 || "Degenerated GC".equals(action) || "Init Update Refs".equals(action)
118 || "Final Update Refs".equals(action) || "Final Roots".equals(action);
119 }
120
121 public static void main(String[] args) throws Exception {
122 final long startTimeNanos = System.nanoTime();
123
124 final AtomicLong pausesDuration = new AtomicLong();
125 final AtomicLong cyclesDuration = new AtomicLong();
126 final AtomicLong pausesCount = new AtomicLong();
127 final AtomicLong cyclesCount = new AtomicLong();
128
129 NotificationListener listener = new NotificationListener() {
130 @Override
131 public void handleNotification(Notification n, Object o) {
132 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
133 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
134
135 System.out.println("Received: " + info.getGcName() + "/" + info.getGcAction());
136
137
138 long d = info.getGcInfo().getDuration();
139
140 String name = info.getGcName();
141 if (name.contains("Shenandoah")) {
142 if (name.equals("Shenandoah Pauses")) {
143 pausesCount.incrementAndGet();
144 pausesDuration.addAndGet(d);
145 if (!isExpectedPauseAction(info.getGcAction())) {
146 throw new IllegalStateException("Unknown action: " + info.getGcAction());
147 }
148 } else if (name.equals("Shenandoah Cycles")) {
149 cyclesCount.incrementAndGet();
150 cyclesDuration.addAndGet(d);
151 } else {
152 throw new IllegalStateException("Unknown name: " + name);
153 }
154 }
155 }
156 }
157 };
158
159 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
160 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
161 }
162
163 final int size = 100_000;
164 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
165
166 for (int c = 0; c < count; c++) {
167 sink = new int[size];
168 }
169
170 // Look at test timeout to figure out how long we can wait without breaking into timeout.
171 // Default to 1/4 of the remaining time in 1s steps.
172 final long STEP_MS = 1000;
173 long spentTimeNanos = System.nanoTime() - startTimeNanos;
174 long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - (spentTimeNanos / 1_000_000L)) / STEP_MS / 4;
175
176 long actualPauses = 0;
177 long actualCycles = 0;
178
179 // Wait until enough notifications are accrued to match minimum boundary.
180 long minExpected = 10;
181
182 long tries = 0;
183 while (tries++ < maxTries) {
184 actualPauses = pausesCount.get();
185 actualCycles = cyclesCount.get();
186 if (minExpected <= actualPauses && minExpected <= actualCycles) {
187 // Wait a little bit to catch the lingering notifications.
188 Thread.sleep(5000);
189 actualPauses = pausesCount.get();
190 actualCycles = cyclesCount.get();
191 break;
192 }
193 Thread.sleep(STEP_MS);
194 }
195
196 {
197 String msg = "Pauses expected = [" + minExpected + "; +inf], actual = " + actualPauses;
198 if (minExpected <= actualPauses) {
199 System.out.println(msg);
200 } else {
201 throw new IllegalStateException(msg);
202 }
203 }
204
205 {
206 String msg = "Cycles expected = [" + minExpected + "; +inf], actual = " + actualCycles;
207 if (minExpected <= actualCycles) {
208 System.out.println(msg);
209 } else {
210 throw new IllegalStateException(msg);
211 }
212 }
213
214 {
215 long actualPauseDuration = pausesDuration.get();
216 long actualCycleDuration = cyclesDuration.get();
217
218 String msg = "Pauses duration (" + actualPauseDuration + ") is expected to be not larger than cycles duration (" + actualCycleDuration + ")";
219
220 if (actualPauseDuration <= actualCycleDuration) {
221 System.out.println(msg);
222 } else {
223 throw new IllegalStateException(msg);
224 }
225 }
226 }
227 }