50113
|
1 |
/*
|
|
2 |
* Copyright (c) 2014, 2018, 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 |
package jdk.jfr.event.gc.detailed;
|
|
26 |
|
|
27 |
import static jdk.test.lib.Asserts.assertEquals;
|
|
28 |
import static jdk.test.lib.Asserts.assertNotEquals;
|
|
29 |
import static jdk.test.lib.Asserts.assertNotNull;
|
|
30 |
import static jdk.test.lib.Asserts.assertTrue;
|
|
31 |
|
|
32 |
import java.lang.management.GarbageCollectorMXBean;
|
|
33 |
import java.lang.management.ManagementFactory;
|
|
34 |
import java.util.List;
|
|
35 |
import java.util.concurrent.ThreadLocalRandom;
|
|
36 |
|
|
37 |
import jdk.jfr.Recording;
|
|
38 |
import jdk.jfr.consumer.RecordedEvent;
|
|
39 |
import jdk.test.lib.jfr.EventNames;
|
|
40 |
import jdk.test.lib.jfr.Events;
|
|
41 |
|
|
42 |
/**
|
|
43 |
* This is a base class for testing Promotion Events
|
|
44 |
*
|
|
45 |
* See TestPromotionEventWith* for actual test classes. Tests must set
|
|
46 |
* -XX:MaxTenuringThreshold=5 -XX:InitialTenuringThreshold=5
|
|
47 |
*
|
|
48 |
* @author Staffan Friberg
|
|
49 |
*/
|
|
50 |
public class PromotionEvent {
|
|
51 |
|
|
52 |
private final static String PROMOTION_IN_NEW_PLAB_NAME = EventNames.PromoteObjectInNewPLAB;
|
|
53 |
private final static String PROMOTION_OUTSIDE_PLAB_NAME = EventNames.PromoteObjectOutsidePLAB;
|
|
54 |
|
|
55 |
// This value needs to match the command line option set above
|
|
56 |
private final static int MAX_TENURING_THRESHOLD = 5;
|
|
57 |
|
|
58 |
// Keep track of the collection count just before and after JFR recording
|
|
59 |
private static int startGCCount = 0;
|
|
60 |
|
|
61 |
// Dummy objects to keep things alive and assure allocation happens
|
|
62 |
public static Object dummy;
|
|
63 |
public static Object[] keepAlive = new Object[128];
|
|
64 |
public static Object[] age = new Object[128];
|
|
65 |
|
|
66 |
public static void test() throws Exception {
|
|
67 |
GarbageCollectorMXBean ycBean = null;
|
|
68 |
|
|
69 |
List<GarbageCollectorMXBean> gcBeans = ManagementFactory.getGarbageCollectorMXBeans();
|
|
70 |
for (GarbageCollectorMXBean gcBean : gcBeans) {
|
|
71 |
if ("PS Scavenge".equals(gcBean.getName())
|
|
72 |
|| "G1 Young Generation".equals(gcBean.getName())
|
|
73 |
|| ("ParNew".equals(gcBean.getName()))) {
|
|
74 |
ycBean = gcBean;
|
|
75 |
}
|
|
76 |
|
|
77 |
if (ycBean != null) {
|
|
78 |
break;
|
|
79 |
}
|
|
80 |
}
|
|
81 |
|
|
82 |
if (ycBean == null) {
|
|
83 |
assertNotNull(ycBean, "Test failed since the MXBean for the Young Collector could not be found.");
|
|
84 |
return; // To remove IDE warning
|
|
85 |
}
|
|
86 |
|
|
87 |
System.gc(); // Clear nusery before recording
|
|
88 |
|
|
89 |
// Get total GC count before recording
|
|
90 |
for (GarbageCollectorMXBean gcBean : gcBeans) {
|
|
91 |
startGCCount += gcBean.getCollectionCount();
|
|
92 |
}
|
|
93 |
|
|
94 |
Recording recording = new Recording();
|
|
95 |
recording.enable(PROMOTION_IN_NEW_PLAB_NAME);
|
|
96 |
recording.enable(PROMOTION_OUTSIDE_PLAB_NAME);
|
|
97 |
recording.start();
|
|
98 |
|
|
99 |
byte[] largeBytes = new byte[1024 * 10];
|
|
100 |
byte[] smallBytes = new byte[64];
|
|
101 |
|
|
102 |
// Some large strings to keep alive for tenuring
|
|
103 |
for (int i = 0; i < keepAlive.length / 2; i++) {
|
|
104 |
ThreadLocalRandom.current().nextBytes(largeBytes);
|
|
105 |
keepAlive[i] = new String(largeBytes);
|
|
106 |
}
|
|
107 |
|
|
108 |
// Some small strings to keep alive for tenuring
|
|
109 |
for (int i = keepAlive.length / 2; i < keepAlive.length; i++) {
|
|
110 |
ThreadLocalRandom.current().nextBytes(smallBytes);
|
|
111 |
keepAlive[i] = new String(smallBytes);
|
|
112 |
}
|
|
113 |
|
|
114 |
// Allocate temp data to force GCs until we have promoted the live data
|
|
115 |
for (int gcCount = 0; gcCount < MAX_TENURING_THRESHOLD * 2; gcCount++) {
|
|
116 |
long currentGCCount = ycBean.getCollectionCount();
|
|
117 |
|
|
118 |
// some large strings to age
|
|
119 |
for (int i = 0; i < age.length / 2; i++) {
|
|
120 |
ThreadLocalRandom.current().nextBytes(largeBytes);
|
|
121 |
age[i] = new String(largeBytes);
|
|
122 |
}
|
|
123 |
|
|
124 |
// Some small strings to age
|
|
125 |
for (int i = age.length / 2; i < age.length; i++) {
|
|
126 |
ThreadLocalRandom.current().nextBytes(smallBytes);
|
|
127 |
age[i] = new String(smallBytes);
|
|
128 |
}
|
|
129 |
|
|
130 |
while (ycBean.getCollectionCount() <= currentGCCount + 3) {
|
|
131 |
ThreadLocalRandom.current().nextBytes(smallBytes);
|
|
132 |
dummy = new String(smallBytes);
|
|
133 |
}
|
|
134 |
}
|
|
135 |
|
|
136 |
recording.stop();
|
|
137 |
|
|
138 |
List<RecordedEvent> events = Events.fromRecording(recording);
|
|
139 |
|
|
140 |
verifyPromotionSampleEvents(events);
|
|
141 |
|
|
142 |
recording.close();
|
|
143 |
}
|
|
144 |
|
|
145 |
private static void verifyPromotionSampleEvents(List<RecordedEvent> events)
|
|
146 |
throws Exception {
|
|
147 |
|
|
148 |
boolean objectWasPromotedInNewPLAB = false;
|
|
149 |
boolean objectPromotedInNewPLABWasAged = false;
|
|
150 |
boolean objectPromotedInNewPLABWasTenured = false;
|
|
151 |
boolean objectWasPromotedOutsidePLAB = false;
|
|
152 |
boolean objectPromotedOutsidePLABWasAged = false;
|
|
153 |
boolean objectPromotedOutsidePLABWasTenured = false;
|
|
154 |
|
|
155 |
Events.hasEvents(events);
|
|
156 |
|
|
157 |
for (RecordedEvent event : events) {
|
|
158 |
// Read all common fields
|
|
159 |
Events.assertField(event, "gcId").atLeast(startGCCount).getValue();
|
|
160 |
String className = (event.getEventType()).getName().toString();
|
|
161 |
Events.assertField(event, "tenuringAge").atLeast(0).atMost(MAX_TENURING_THRESHOLD).getValue();
|
|
162 |
Boolean tenured = Events.assertField(event, "tenured").getValue();
|
|
163 |
Long objectSize = Events.assertField(event, "objectSize").above(0L).getValue();
|
|
164 |
|
|
165 |
// Verify Class Name
|
|
166 |
assertNotNull(className, "Class name is null. Event: " + event);
|
|
167 |
assertNotEquals(className.length(), 0, "Class name is of zero length. Event: " + event);
|
|
168 |
|
|
169 |
// Verify PLAB size and direct allocation
|
|
170 |
if (PROMOTION_IN_NEW_PLAB_NAME.equals(event.getEventType().getName())) {
|
|
171 |
// Read event specific fields
|
|
172 |
Long plabSize = Events.assertField(event, "plabSize").above(0L).getValue();
|
|
173 |
assertTrue(plabSize >= objectSize, "PLAB size is smaller than object size. Event: " + event);
|
|
174 |
objectWasPromotedInNewPLAB = true;
|
|
175 |
// Verify tenured is hard to do as objects might be tenured earlier than the max threshold
|
|
176 |
// but at least verify that we got the field set at least once during the test
|
|
177 |
if (tenured) {
|
|
178 |
objectPromotedInNewPLABWasTenured = true;
|
|
179 |
} else {
|
|
180 |
objectPromotedInNewPLABWasAged = true;
|
|
181 |
}
|
|
182 |
} else if (PROMOTION_OUTSIDE_PLAB_NAME.equals(event.getEventType().getName())) {
|
|
183 |
objectWasPromotedOutsidePLAB = true;
|
|
184 |
// Verify tenured is hard to do as objects might be tenured earlier than the max threshold
|
|
185 |
// but at least verify that we got the field set at least once during the test
|
|
186 |
if (tenured) {
|
|
187 |
objectPromotedOutsidePLABWasTenured = true;
|
|
188 |
} else {
|
|
189 |
objectPromotedOutsidePLABWasAged = true;
|
|
190 |
}
|
|
191 |
} else {
|
|
192 |
assertEquals(event.getEventType().getName(), "Unreachable...", "Got wrong type of event " + event);
|
|
193 |
}
|
|
194 |
|
|
195 |
}
|
|
196 |
|
|
197 |
// Verify that at least one event of these types occured during test
|
|
198 |
assertTrue(objectWasPromotedInNewPLAB, "No object in new plab was promoted in test");
|
|
199 |
assertTrue(objectPromotedInNewPLABWasAged, "No object in new plab was aged in test");
|
|
200 |
assertTrue(objectPromotedInNewPLABWasTenured, "No object in new plab was tenured in test");
|
|
201 |
assertTrue(objectWasPromotedOutsidePLAB, "No object outside plab was promoted in test");
|
|
202 |
assertTrue(objectPromotedOutsidePLABWasAged, "No object outside plab was aged in test");
|
|
203 |
assertTrue(objectPromotedOutsidePLABWasTenured, "No object outside plab was tenured in test");
|
|
204 |
}
|
|
205 |
}
|