1 /*
2 * Copyright (c) 2019, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.jfr.event.runtime;
27
28 import java.io.IOException;
29 import java.time.Duration;
30 import java.util.List;
31
32 import jdk.jfr.Recording;
33 import jdk.jfr.consumer.RecordedClass;
34 import jdk.jfr.consumer.RecordedClassLoader;
35 import jdk.jfr.consumer.RecordedEvent;
36 import jdk.test.lib.Asserts;
37 import jdk.test.lib.jfr.EventNames;
38 import jdk.test.lib.jfr.Events;
39 import jdk.test.lib.jfr.TestClassLoader;
40
41 /**
42 * @test
43 * @key jfr
44 * @requires vm.hasJFR
45 * @library /test/lib /test/jdk
46 * @build jdk.jfr.event.runtime.TestClasses
47 * @run main/othervm jdk.jfr.event.runtime.TestTableStatisticsEvent
48 */
49 public final class TestTableStatisticsEvent {
50
51 static private void exerciseStringTable() {
52 final int SIZE = 10000;
53 String strings[] = new String[SIZE];
54 for (int i=0; i<SIZE; i++) {
55 strings[i] = new String("New String "+i);
56 }
57 }
58
59 static private void validateCommonTableEvent(RecordedEvent event, String name) throws IOException {
60 Long numberOfBuckets = event.getValue("numberOfBuckets");
61 Long numberOfEntries = event.getValue("numberOfEntries");
62 Long totalFootprint = event.getValue("totalFootprint");
63 Long maximumBucketCount = event.getValue("maximumBucketCount");
64 float averageBucketCount = event.getValue("averageBucketCount");
65 float varianceOfBucketCount = event.getValue("varianceOfBucketCount");
66 float stdDevOfBucketCount = event.getValue("stdDevOfBucketCount");
67 float addRate = event.getValue("insertionRate");
68 float removeRate = event.getValue("removalRate");
69
70 Asserts.assertTrue((numberOfBuckets>0), "No buckets for " + name);
71 Asserts.assertTrue((totalFootprint>0), "Zero sized table for " + name);
72 Asserts.assertTrue((maximumBucketCount>=averageBucketCount), "Maximum bucket count not equal to or greater than the average for " + name);
73 if ((addRate > 0.0) && (addRate > removeRate)) {
74 Asserts.assertTrue((numberOfEntries>0), "Entries marked as added, but no entries found for " + name);
75 }
76 }
77
78 static private void validateStringTableEvent(RecordedEvent event, String name) throws IOException {
79 validateCommonTableEvent(event, name);
80
81 Long numberOfEntries = event.getValue("numberOfEntries");
82 Asserts.assertTrue((numberOfEntries>0), "No entries for " + name);
83 }
84
85 static private void testStringTableStatisticsEvent(Recording recording, String name) throws IOException {
86 boolean gotEvent = false;
87 List<RecordedEvent> events = Events.fromRecording(recording);
88 for (RecordedEvent event : events) {
89 if (event.toString().contains(name)) {
90 gotEvent = true;
91 validateStringTableEvent(event, name);
92 }
93 }
94 Asserts.assertTrue(gotEvent, "No table statistics event found for " + name);
95 }
96
97 static private void testCommonTableStatisticsEvent(Recording recording, String name) throws IOException {
98 boolean gotEvent = false;
99 List<RecordedEvent> events = Events.fromRecording(recording);
100 for (RecordedEvent event : events) {
101 if (event.toString().contains(name)) {
102 gotEvent = true;
103 validateCommonTableEvent(event, name);
104 }
105 }
106 Asserts.assertTrue(gotEvent, "No table statistics event found for " + name);
107 }
108
109 public static void main(String[] args) throws Throwable {
110 final long DURATION_MS = 2000;
111 Recording recording = new Recording();
112 recording.enable(EventNames.SymbolTableStatistics).withThreshold(Duration.ofMillis(DURATION_MS));
113 recording.enable(EventNames.StringTableStatistics).withThreshold(Duration.ofMillis(DURATION_MS));
114 recording.enable(EventNames.PlaceholderTableStatistics).withThreshold(Duration.ofMillis(DURATION_MS));
115 recording.enable(EventNames.LoaderConstraintsTableStatistics).withThreshold(Duration.ofMillis(DURATION_MS));
116 recording.enable(EventNames.ProtectionDomainCacheTableStatistics).withThreshold(Duration.ofMillis(DURATION_MS));
117 recording.start();
118 exerciseStringTable();
119 Thread.currentThread().sleep(DURATION_MS/1000);
120 System.gc();
121 recording.stop();
122
123 testCommonTableStatisticsEvent(recording, "SymbolTable");
124 testStringTableStatisticsEvent(recording, "StringTable");
125 testCommonTableStatisticsEvent(recording, "PlaceholderTable");
126 testCommonTableStatisticsEvent(recording, "StringTable");
127 testCommonTableStatisticsEvent(recording, "LoaderConstraintsTable");
128 testCommonTableStatisticsEvent(recording, "ProtectionDomainCacheTable");
129 }
130 }