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 id=passive
27 * @summary Check that MX notifications are reported for all cycles
28 * @library /test/lib /
29 * @requires vm.gc.Shenandoah
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 id=aggressive
44 * @summary Check that MX notifications are reported for all cycles
45 * @library /test/lib /
46 * @requires vm.gc.Shenandoah
47 *
48 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
49 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
50 * TestPauseNotifications
51 */
52
53 /*
54 * @test id=adaptive
55 * @summary Check that MX notifications are reported for all cycles
56 * @library /test/lib /
57 * @requires vm.gc.Shenandoah
58 *
59 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
60 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
61 * TestPauseNotifications
62 */
63
64 /*
65 * @test id=static
66 * @summary Check that MX notifications are reported for all cycles
67 * @library /test/lib /
68 * @requires vm.gc.Shenandoah
69 *
70 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
71 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
72 * TestPauseNotifications
73 */
74
75 /*
76 * @test id=compact
77 * @summary Check that MX notifications are reported for all cycles
78 * @library /test/lib /
79 * @requires vm.gc.Shenandoah
80 *
81 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
82 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
83 * TestPauseNotifications
84 */
85
86 /*
87 * @test id=iu
88 * @summary Check that MX notifications are reported for all cycles
89 * @library /test/lib /
90 * @requires vm.gc.Shenandoah
91 *
92 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
93 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu -XX:ShenandoahGCHeuristics=aggressive
94 * TestPauseNotifications
95 *
96 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
97 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=iu
98 * TestPauseNotifications
99 */
100
101 import java.util.*;
102 import java.util.concurrent.atomic.*;
103 import javax.management.*;
104 import java.lang.management.*;
105 import javax.management.openmbean.*;
106
107 import jdk.test.lib.Utils;
108
109 import com.sun.management.GarbageCollectionNotificationInfo;
110
111 public class TestPauseNotifications {
112
113 static final long HEAP_MB = 128; // adjust for test configuration above
114 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
115
116 static volatile Object sink;
117
118 private static boolean isExpectedPauseAction(String action) {
119 return "Init Mark".equals(action) || "Final Mark".equals(action) || "Full GC".equals(action)
120 || "Degenerated GC".equals(action) || "Init Update Refs".equals(action)
121 || "Final Update Refs".equals(action) || "Final Roots".equals(action);
122 }
123
124 public static void main(String[] args) throws Exception {
125 final long startTimeNanos = System.nanoTime();
126
127 final AtomicLong pausesDuration = new AtomicLong();
128 final AtomicLong cyclesDuration = new AtomicLong();
129 final AtomicLong pausesCount = new AtomicLong();
130 final AtomicLong cyclesCount = new AtomicLong();
131
132 NotificationListener listener = new NotificationListener() {
133 @Override
134 public void handleNotification(Notification n, Object o) {
135 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
136 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
137
138 System.out.println("Received: " + info.getGcName() + "/" + info.getGcAction());
139
140
141 long d = info.getGcInfo().getDuration();
142
143 String name = info.getGcName();
144 if (name.contains("Shenandoah")) {
145 if (name.equals("Shenandoah Pauses")) {
146 pausesCount.incrementAndGet();
147 pausesDuration.addAndGet(d);
148 if (!isExpectedPauseAction(info.getGcAction())) {
149 throw new IllegalStateException("Unknown action: " + info.getGcAction());
150 }
151 } else if (name.equals("Shenandoah Cycles")) {
152 cyclesCount.incrementAndGet();
153 cyclesDuration.addAndGet(d);
154 } else {
155 throw new IllegalStateException("Unknown name: " + name);
156 }
157 }
158 }
159 }
160 };
161
162 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
163 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
164 }
165
166 final int size = 100_000;
167 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
168
169 for (int c = 0; c < count; c++) {
170 sink = new int[size];
171 }
172
173 // Look at test timeout to figure out how long we can wait without breaking into timeout.
174 // Default to 1/4 of the remaining time in 1s steps.
175 final long STEP_MS = 1000;
176 long spentTimeNanos = System.nanoTime() - startTimeNanos;
177 long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - (spentTimeNanos / 1_000_000L)) / STEP_MS / 4;
178
179 long actualPauses = 0;
180 long actualCycles = 0;
181
182 // Wait until enough notifications are accrued to match minimum boundary.
183 long minExpected = 10;
184
185 long tries = 0;
186 while (tries++ < maxTries) {
187 actualPauses = pausesCount.get();
188 actualCycles = cyclesCount.get();
189 if (minExpected <= actualPauses && minExpected <= actualCycles) {
190 // Wait a little bit to catch the lingering notifications.
191 Thread.sleep(5000);
192 actualPauses = pausesCount.get();
193 actualCycles = cyclesCount.get();
194 break;
195 }
196 Thread.sleep(STEP_MS);
197 }
198
199 {
200 String msg = "Pauses expected = [" + minExpected + "; +inf], actual = " + actualPauses;
201 if (minExpected <= actualPauses) {
202 System.out.println(msg);
203 } else {
204 throw new IllegalStateException(msg);
205 }
206 }
207
208 {
209 String msg = "Cycles expected = [" + minExpected + "; +inf], actual = " + actualCycles;
210 if (minExpected <= actualCycles) {
211 System.out.println(msg);
212 } else {
213 throw new IllegalStateException(msg);
214 }
215 }
216
217 {
218 long actualPauseDuration = pausesDuration.get();
219 long actualCycleDuration = cyclesDuration.get();
220
221 String msg = "Pauses duration (" + actualPauseDuration + ") is expected to be not larger than cycles duration (" + actualCycleDuration + ")";
222
223 if (actualPauseDuration <= actualCycleDuration) {
224 System.out.println(msg);
225 } else {
226 throw new IllegalStateException(msg);
227 }
228 }
229 }
230 }