1 /*
2 * Copyright (c) 2014, 2015, Oracle and/or its affiliates. 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 import jdk.test.lib.Asserts;
25 import jdk.test.lib.Utils;
26 import java.lang.management.ManagementFactory;
27 import java.lang.management.MemoryNotificationInfo;
28 import java.lang.management.MemoryPoolMXBean;
29 import java.util.HashMap;
30 import java.util.Map;
31 import java.util.concurrent.atomic.AtomicInteger;
32 import javax.management.ListenerNotFoundException;
33 import javax.management.Notification;
34 import javax.management.NotificationEmitter;
35 import javax.management.NotificationListener;
36 import sun.hotspot.code.BlobType;
37
38 /*
39 * @test PoolsIndependenceTest
40 * @modules java.base/jdk.internal.misc
41 * @library /testlibrary /test/lib
42 * @build PoolsIndependenceTest
43 * @run main ClassFileInstaller sun.hotspot.WhiteBox
44 * sun.hotspot.WhiteBox$WhiteBoxPermission
45 * @run main/othervm -Xbootclasspath/a:. -XX:-UseCodeCacheFlushing
46 * -XX:-MethodFlushing -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
47 * -XX:+SegmentedCodeCache PoolsIndependenceTest
48 * @summary testing of getUsageThreshold()
49 */
50 public class PoolsIndependenceTest implements NotificationListener {
51
52 private final Map<String, AtomicInteger> counters;
53 private final BlobType btype;
54 private volatile long lastEventTimestamp;
55
56 public PoolsIndependenceTest(BlobType btype) {
57 counters = new HashMap<>();
58 for (BlobType bt : BlobType.getAvailable()) {
59 counters.put(bt.getMemoryPool().getName(), new AtomicInteger(0));
60 }
61 this.btype = btype;
62 lastEventTimestamp = 0;
63 CodeCacheUtils.disableCollectionUsageThresholds();
64 }
65
66 public static void main(String[] args) {
67 for (BlobType bt : BlobType.getAvailable()) {
68 new PoolsIndependenceTest(bt).runTest();
69 }
70 }
71
72 protected void runTest() {
73 MemoryPoolMXBean bean = btype.getMemoryPool();
74 ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
75 addNotificationListener(this, null, null);
76 bean.setUsageThreshold(bean.getUsage().getUsed() + 1);
77 long beginTimestamp = System.currentTimeMillis();
78 CodeCacheUtils.WB.allocateCodeBlob(
79 CodeCacheUtils.ALLOCATION_SIZE, btype.id);
80 CodeCacheUtils.WB.fullGC();
81 /* waiting for expected event to be received plus double the time took
82 to receive expected event(for possible unexpected) and
83 plus 1 second in case expected event received (almost)immediately */
84 Utils.waitForCondition(() -> {
85 long currentTimestamp = System.currentTimeMillis();
86 int eventsCount
87 = counters.get(btype.getMemoryPool().getName()).get();
88 if (eventsCount > 0) {
89 if (eventsCount > 1) {
90 return true;
91 }
92 long timeLastEventTook
93 = beginTimestamp - lastEventTimestamp;
94 long timeoutValue
95 = 1000L + beginTimestamp + 3L * timeLastEventTook;
96 return currentTimestamp > timeoutValue;
97 }
98 return false;
99 });
100 for (BlobType bt : BlobType.getAvailable()) {
101 int expectedNotificationsAmount = bt.equals(btype) ? 1 : 0;
102 CodeCacheUtils.assertEQorGTE(btype, counters.get(bt.getMemoryPool().getName()).get(),
103 expectedNotificationsAmount, String.format("Unexpected "
104 + "amount of notifications for pool: %s",
105 bt.getMemoryPool().getName()));
106 }
107 try {
108 ((NotificationEmitter) ManagementFactory.getMemoryMXBean()).
109 removeNotificationListener(this);
110 } catch (ListenerNotFoundException ex) {
111 throw new AssertionError("Can't remove notification listener", ex);
112 }
113 System.out.printf("INFO: Scenario with %s finished%n", bean.getName());
114 }
115
116 @Override
117 public void handleNotification(Notification notification, Object handback) {
118 String nType = notification.getType();
119 String poolName
120 = CodeCacheUtils.getPoolNameFromNotification(notification);
121 // consider code cache events only
122 if (CodeCacheUtils.isAvailableCodeHeapPoolName(poolName)) {
123 Asserts.assertEQ(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED,
124 nType, "Unexpected event received: " + nType);
125 // receiving events from available CodeCache-related beans only
126 if (counters.get(poolName) != null) {
127 counters.get(poolName).incrementAndGet();
128 lastEventTimestamp = System.currentTimeMillis();
129 }
130 }
131 }
132 }