1 /*
2 * Copyright (c) 2013, 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
26 package jdk.jfr.event.gc.detailed;
27
28 import java.time.Duration;
29 import java.util.List;
30 import java.util.Optional;
31 import java.util.Random;
32
33 import jdk.jfr.Recording;
34 import jdk.jfr.consumer.RecordedEvent;
35 import jdk.test.lib.Asserts;
36 import jdk.test.lib.jfr.EventNames;
37 import jdk.test.lib.jfr.Events;
38
39 /**
40 * @test
41 * @key jfr
42 *
43 *
44 * @library /lib /
45 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:-UseFastUnorderedTimeStamps -XX:G1HeapRegionSize=1m -Xmx64m -Xmn16m -XX:+UseG1GC jdk.jfr.event.gc.detailed.TestEvacuationInfoEvent
46 */
47 public class TestEvacuationInfoEvent {
48 private final static String EVENT_INFO_NAME = EventNames.EvacuationInfo;
49 private final static String EVENT_FAILED_NAME = EventNames.EvacuationFailed;
50
51 public static void main(String[] args) throws Throwable {
52 final long g1HeapRegionSize = 1024 * 1024;
53 Recording recording = new Recording();
54 recording.enable(EVENT_INFO_NAME).withThreshold(Duration.ofMillis(0));
55 recording.enable(EVENT_FAILED_NAME).withThreshold(Duration.ofMillis(0));
56 recording.start();
57 allocate();
58 recording.stop();
59
60 List<RecordedEvent> events = Events.fromRecording(recording);
61 Asserts.assertFalse(events.isEmpty(), "No events found");
62 for (RecordedEvent event : events) {
63 if (!Events.isEventType(event, EVENT_INFO_NAME)) {
64 continue;
65 }
66 System.out.println("Event: " + event);
67
68 int setRegions = Events.assertField(event, "cSetRegions").atLeast(0).getValue();
69 long setUsedAfter = Events.assertField(event, "cSetUsedAfter").atLeast(0L).getValue();
70 long setUsedBefore = Events.assertField(event, "cSetUsedBefore").atLeast(setUsedAfter).getValue();
71 int allocationRegions = Events.assertField(event, "allocationRegions").atLeast(0).getValue();
72 long allocRegionsUsedBefore = Events.assertField(event, "allocRegionsUsedBefore").atLeast(0L).getValue();
73 long allocRegionsUsedAfter = Events.assertField(event, "allocRegionsUsedAfter").atLeast(0L).getValue();
74 long bytesCopied = Events.assertField(event, "bytesCopied").atLeast(0L).getValue();
75 int regionsFreed = Events.assertField(event, "regionsFreed").atLeast(0).getValue();
76
77 Asserts.assertEquals(allocRegionsUsedBefore + bytesCopied, allocRegionsUsedAfter, "allocRegionsUsedBefore + bytesCopied = allocRegionsUsedAfter");
78 Asserts.assertGreaterThanOrEqual(setRegions, regionsFreed, "setRegions >= regionsFreed");
79 Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * allocationRegions, allocRegionsUsedAfter, "G1HeapRegionSize * allocationRegions >= allocationRegionsUsedAfter");
80 Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * setRegions, setUsedAfter, "G1HeapRegionSize * setRegions >= setUsedAfter");
81 Asserts.assertGreaterThanOrEqual(g1HeapRegionSize * setRegions, setUsedBefore, "G1HeapRegionSize * setRegions >= setUsedBefore");
82 Asserts.assertGreaterThanOrEqual(g1HeapRegionSize, allocRegionsUsedBefore, "G1HeapRegionSize >= allocRegionsUsedBefore");
83
84 int gcId = Events.assertField(event, "gcId").getValue();
85 boolean isEvacuationFailed = containsEvacuationFailed(events, gcId);
86 if (isEvacuationFailed) {
87 Asserts.assertGreaterThan(setUsedAfter, 0L, "EvacuationFailure -> setUsedAfter > 0");
88 Asserts.assertGreaterThan(setRegions, regionsFreed, "EvacuationFailure -> setRegions > regionsFreed");
89 } else {
90 Asserts.assertEquals(setUsedAfter, 0L, "No EvacuationFailure -> setUsedAfter = 0");
91 Asserts.assertEquals(setRegions, regionsFreed, "No EvacuationFailure -> setRegions = regionsFreed");
92 }
93 }
94 }
95
96 private static boolean containsEvacuationFailed(List<RecordedEvent> events, int gcId) {
97 Optional<RecordedEvent> failedEvent = events.stream()
98 .filter(e -> Events.isEventType(e, EVENT_FAILED_NAME))
99 .filter(e -> gcId == (int)Events.assertField(e, "gcId").getValue())
100 .findAny();
101 System.out.println("Failed event: " + (failedEvent.isPresent() ? failedEvent.get() : "None"));
102 return failedEvent.isPresent();
103 }
104
105 public static DummyObject[] dummys = new DummyObject[6000];
106
107 /**
108 * Allocate memory to trigger garbage collections.
109 * We want the allocated objects to have different life time, because we want both "young" and "old" objects.
110 * This is done by keeping the objects in an array and step the current index by a small random number in the loop.
111 * The loop will continue until we have allocated a fixed number of bytes.
112 */
113 private static void allocate() {
114 Random r = new Random(0);
115 long bytesToAllocate = 256 * 1024 * 1024;
116 int currPos = 0;
117 while (bytesToAllocate > 0) {
118 int allocSize = 1000 + (r.nextInt(4000));
119 bytesToAllocate -= allocSize;
120 dummys[currPos] = new DummyObject(allocSize);
121
122 // Skip a few positions to get different duration on the objects.
123 currPos = (currPos + r.nextInt(20)) % dummys.length;
124 }
125 for (int c=0; c<dummys.length; c++) {
126 dummys[c] = null;
127 }
128 System.gc();
129 }
130
131 public static class DummyObject {
132 public byte[] payload;
133 DummyObject(int size) {
134 payload = new byte[size];
135 }
136 }
137 }