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 & vm.opt.ShenandoahGCMode != "generational"
31 *
32 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
33 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
34 * -XX:+ShenandoahDegeneratedGC -Dprecise=true
35 * TestChurnNotifications
36 *
37 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
38 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=passive
39 * -XX:-ShenandoahDegeneratedGC -Dprecise=true
40 * TestChurnNotifications
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 & vm.opt.ShenandoahGCMode != "generational"
48 *
49 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
50 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=aggressive
51 * -Dprecise=false
52 * TestChurnNotifications
53 */
54
55 /*
56 * @test id=adaptive
57 * @summary Check that MX notifications are reported for all cycles
58 * @library /test/lib /
59 * @requires vm.gc.Shenandoah & vm.opt.ShenandoahGCMode != "generational"
60 *
61 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
62 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=adaptive
63 * -Dprecise=false
64 * TestChurnNotifications
65 */
66
67 /*
68 * @test id=static
69 * @summary Check that MX notifications are reported for all cycles
70 * @library /test/lib /
71 * @requires vm.gc.Shenandoah & vm.opt.ShenandoahGCMode != "generational"
72 *
73 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
74 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=static
75 * -Dprecise=false
76 * TestChurnNotifications
77 */
78
79 /*
80 * @test id=compact
81 * @summary Check that MX notifications are reported for all cycles
82 * @library /test/lib /
83 * @requires vm.gc.Shenandoah & vm.opt.ShenandoahGCMode != "generational"
84 *
85 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
86 * -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact
87 * -Dprecise=false
88 * TestChurnNotifications
89 */
90
91 /*
92 * @test id=generational
93 * @summary Check that MX notifications are reported for all cycles
94 * @library /test/lib /
95 * @requires vm.gc.Shenandoah
96 *
97 * @run main/othervm -Xmx128m -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions
98 * -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational
99 * -Dprecise=false -Dmem.pool=Young
100 * TestChurnNotifications
101 */
102
103 import java.util.*;
104 import java.util.concurrent.atomic.*;
105 import javax.management.*;
106 import java.lang.management.*;
107 import javax.management.openmbean.*;
108
109 import jdk.test.lib.Utils;
110
111 import com.sun.management.GarbageCollectionNotificationInfo;
112
113 public class TestChurnNotifications {
114
115 static final long HEAP_MB = 128; // adjust for test configuration above
116 static final long TARGET_MB = Long.getLong("target", 2_000); // 2 Gb allocation
117
118 // Should we track the churn precisely?
119 // Precise tracking is only reliable when GC is fully stop-the-world. Otherwise,
120 // we cannot tell, looking at heap used before/after, what was the GC churn.
121 static final boolean PRECISE = Boolean.getBoolean("precise");
122
123 static final long M = 1024 * 1024;
124
125 static volatile Object sink;
126
127 private static final String POOL_NAME = "Young".equals(System.getProperty("mem.pool")) ? "Shenandoah Young Gen" : "Shenandoah";
128
129 public static void main(String[] args) throws Exception {
130 final long startTimeNanos = System.nanoTime();
131
132 final AtomicLong churnBytes = new AtomicLong();
133
134 NotificationListener listener = new NotificationListener() {
135 @Override
136 public void handleNotification(Notification n, Object o) {
137 if (n.getType().equals(GarbageCollectionNotificationInfo.GARBAGE_COLLECTION_NOTIFICATION)) {
138 GarbageCollectionNotificationInfo info = GarbageCollectionNotificationInfo.from((CompositeData) n.getUserData());
139 Map<String, MemoryUsage> mapBefore = info.getGcInfo().getMemoryUsageBeforeGc();
140 Map<String, MemoryUsage> mapAfter = info.getGcInfo().getMemoryUsageAfterGc();
141
142 MemoryUsage before = mapBefore.get(POOL_NAME);
143 MemoryUsage after = mapAfter.get(POOL_NAME);
144
145 if ((before != null) && (after != null)) {
146 long diff = before.getUsed() - after.getUsed();
147 if (diff > 0) {
148 churnBytes.addAndGet(diff);
149 }
150 }
151 }
152 }
153 };
154
155 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) {
156 ((NotificationEmitter) bean).addNotificationListener(listener, null, null);
157 }
158
159 final int size = 100_000;
160 long count = TARGET_MB * 1024 * 1024 / (16 + 4 * size);
161
162 long mem = count * (16 + 4 * size);
163
164 for (int c = 0; c < count; c++) {
165 sink = new int[size];
166 }
167
168 System.gc();
169
170 long minExpected = PRECISE ? (mem - HEAP_MB * 1024 * 1024) : 1;
171 long maxExpected = mem + HEAP_MB * 1024 * 1024;
172 long actual = 0;
173
174 // Look at test timeout to figure out how long we can wait without breaking into timeout.
175 // Default to 1/4 of the remaining time in 1s steps.
176 final long STEP_MS = 1000;
177 long spentTimeNanos = System.nanoTime() - startTimeNanos;
178 long maxTries = (Utils.adjustTimeout(Utils.DEFAULT_TEST_TIMEOUT) - (spentTimeNanos / 1_000_000L)) / STEP_MS / 4;
179
180 // Wait until enough notifications are accrued to match minimum boundary.
181 long tries = 0;
182 while (tries++ < maxTries) {
183 actual = churnBytes.get();
184 if (minExpected <= actual) {
185 // Wait some more to test if we are breaking the maximum boundary.
186 Thread.sleep(5000);
187 actual = churnBytes.get();
188 break;
189 }
190 Thread.sleep(STEP_MS);
191 }
192
193 String msg = "Expected = [" + minExpected / M + "; " + maxExpected / M + "] (" + mem / M + "), actual = " + actual / M;
194 if (minExpected <= actual && actual <= maxExpected) {
195 System.out.println(msg);
196 } else {
197 throw new IllegalStateException(msg);
198 }
199 }
200 }