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=iu
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=iu -XX:ShenandoahGCHeuristics=aggressive
95 * TestPauseNotifications
96 *
97 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
98 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
99 * TestPauseNotifications
100 */
101
102 /*
103 * @test id=generational
104 * @summary Check that MX notifications are reported for all cycles
105 * @library /test/lib /
106 * @requires vm.gc.Shenandoah
107 *
108 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
109 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
110 * TestPauseNotifications
111 */
112
113 import java.util.*;
114 import java.util.concurrent.atomic.*;
115 import javax.management.*;
116 import java.lang.management.*;
117 import javax.management.openmbean.*;
118
119 import jdk.test.lib.Utils;
120
121 import com.sun.management.GarbageCollectionNotificationInfo;
122
123 public class TestPauseNotifications {
124
125 static final long HEAP_MB = 128; // adjust for test configuration above
126 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
127
128 static volatile Object sink;
129
130 private static boolean isExpectedPauseAction(String action) {
131 return "Init Mark".equals(action) || "Final Mark".equals(action) || "Full GC".equals(action)
132 || "Degenerated GC".equals(action) || "Init Update Refs".equals(action)
133 || "Final Update Refs".equals(action) || "Final Roots".equals(action);
134 }
135
136 public static void main(String[] args) throws Exception {
137 final long startTimeNanos = System.nanoTime();
138
139 final AtomicLong pausesDuration = new AtomicLong();
140 final AtomicLong cyclesDuration = new AtomicLong();
141 final AtomicLong pausesCount = new AtomicLong();
142 final AtomicLong cyclesCount = new AtomicLong();
143
144 NotificationListener listener = new NotificationListener() {
145 @Override
146 public void handleNotification(Notification n, Object o) {
147 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
148 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
149
150 System.out.println("Received: " + info.getGcName() + "/" + info.getGcAction());
151
152
153 long d = info.getGcInfo().getDuration();
154
155 String name = info.getGcName();
156 if (name.contains("Shenandoah")) {
157 if (name.equals("Shenandoah Pauses")) {
158 pausesCount.incrementAndGet();
159 pausesDuration.addAndGet(d);
160 if (!isExpectedPauseAction(info.getGcAction())) {
161 throw new IllegalStateException("Unknown action: " + info.getGcAction());
162 }
163 } else if (name.equals("Shenandoah Cycles")) {
164 cyclesCount.incrementAndGet();
165 cyclesDuration.addAndGet(d);
166 } else {
167 throw new IllegalStateException("Unknown name: " + name);
168 }
169 }
170 }
171 }
172 };
173
174 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
175 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
176 }
177
178 final int size = 100_000;
179 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
180
181 for (int c = 0; c < count; c++) {
182 sink = new int[size];
183 }
184
185 // Look at test timeout to figure out how long we can wait without breaking into timeout.
186 // Default to 1/4 of the remaining time in 1s steps.
187 final long STEP_MS = 1000;
188 long spentTimeNanos = System.nanoTime() - startTimeNanos;
189 long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - (spentTimeNanos / 1_000_000L)) / STEP_MS / 4;
190
191 long actualPauses = 0;
192 long actualCycles = 0;
193
194 // Wait until enough notifications are accrued to match minimum boundary.
195 long minExpected = 10;
196
197 long tries = 0;
198 while (tries++ < maxTries) {
199 actualPauses = pausesCount.get();
200 actualCycles = cyclesCount.get();
201 if (minExpected <= actualPauses && minExpected <= actualCycles) {
202 // Wait a little bit to catch the lingering notifications.
203 Thread.sleep(5000);
204 actualPauses = pausesCount.get();
205 actualCycles = cyclesCount.get();
206 break;
207 }
208 Thread.sleep(STEP_MS);
209 }
210
211 {
212 String msg = "Pauses expected = [" + minExpected + "; +inf], actual = " + actualPauses;
213 if (minExpected <= actualPauses) {
214 System.out.println(msg);
215 } else {
216 throw new IllegalStateException(msg);
217 }
218 }
219
220 {
221 String msg = "Cycles expected = [" + minExpected + "; +inf], actual = " + actualCycles;
222 if (minExpected <= actualCycles) {
223 System.out.println(msg);
224 } else {
225 throw new IllegalStateException(msg);
226 }
227 }
228
229 {
230 long actualPauseDuration = pausesDuration.get();
231 long actualCycleDuration = cyclesDuration.get();
232
233 String msg = "Pauses duration (" + actualPauseDuration + ") is expected to be not larger than cycles duration (" + actualCycleDuration + ")";
234
235 if (actualPauseDuration <= actualCycleDuration) {
236 System.out.println(msg);
237 } else {
238 throw new IllegalStateException(msg);
239 }
240 }
241 }
242 }