55767
|
1 |
/*
|
|
2 |
* Copyright (c) 2017 Red Hat, Inc. and/or its affiliates.
|
|
3 |
*
|
|
4 |
* This code is free software; you can redistribute it and/or modify it
|
|
5 |
* under the terms of the GNU General Public License version 2 only, as
|
|
6 |
* published by the Free Software Foundation.
|
|
7 |
*
|
|
8 |
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
9 |
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
10 |
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
11 |
* version 2 for more details (a copy is included in the LICENSE file that
|
|
12 |
* accompanied this code).
|
|
13 |
*
|
|
14 |
* You should have received a copy of the GNU General Public License version
|
|
15 |
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
16 |
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
17 |
*
|
|
18 |
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
19 |
* or visit www.oracle.com if you need additional information or have any
|
|
20 |
* questions.
|
|
21 |
*
|
|
22 |
*/
|
|
23 |
|
|
24 |
/**
|
|
25 |
* @test TestMemoryMXBeans
|
|
26 |
* @key gc
|
|
27 |
* @summary Test JMX memory beans
|
|
28 |
* @modules java.base/jdk.internal.misc
|
|
29 |
* java.management
|
|
30 |
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xmx1g TestMemoryMXBeans -1 1024
|
|
31 |
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xms1g -Xmx1g TestMemoryMXBeans 1024 1024
|
|
32 |
* @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+UseEpsilonGC -Xms128m -Xmx1g TestMemoryMXBeans 128 1024
|
|
33 |
*/
|
|
34 |
|
|
35 |
import java.lang.management.*;
|
|
36 |
import java.util.*;
|
|
37 |
|
|
38 |
public class TestMemoryMXBeans {
|
|
39 |
|
|
40 |
static volatile Object sink;
|
|
41 |
|
|
42 |
public static void main(String[] args) throws Exception {
|
|
43 |
if (args.length < 2) {
|
|
44 |
throw new IllegalStateException("Should provide expected heap sizes");
|
|
45 |
}
|
|
46 |
|
|
47 |
long initSize = 1L * Integer.parseInt(args[0]) * 1024 * 1024;
|
|
48 |
long maxSize = 1L * Integer.parseInt(args[1]) * 1024 * 1024;
|
|
49 |
|
|
50 |
testMemoryBean(initSize, maxSize);
|
|
51 |
testAllocs();
|
|
52 |
}
|
|
53 |
|
|
54 |
public static void testMemoryBean(long initSize, long maxSize) {
|
|
55 |
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
|
|
56 |
long heapInit = memoryMXBean.getHeapMemoryUsage().getInit();
|
|
57 |
long heapMax = memoryMXBean.getHeapMemoryUsage().getMax();
|
|
58 |
long nonHeapInit = memoryMXBean.getNonHeapMemoryUsage().getInit();
|
|
59 |
long nonHeapMax = memoryMXBean.getNonHeapMemoryUsage().getMax();
|
|
60 |
|
|
61 |
if (initSize > 0 && heapInit != initSize) {
|
|
62 |
throw new IllegalStateException("Init heap size is wrong: " + heapInit + " vs " + initSize);
|
|
63 |
}
|
|
64 |
if (maxSize > 0 && heapMax != maxSize) {
|
|
65 |
throw new IllegalStateException("Max heap size is wrong: " + heapMax + " vs " + maxSize);
|
|
66 |
}
|
|
67 |
}
|
|
68 |
|
|
69 |
public static void testAllocs() {
|
|
70 |
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
|
|
71 |
long heapUsed1 = memoryMXBean.getHeapMemoryUsage().getUsed();
|
|
72 |
sink = new int[1024*1024];
|
|
73 |
long heapUsed2 = memoryMXBean.getHeapMemoryUsage().getUsed();
|
|
74 |
|
|
75 |
long diff = heapUsed2 - heapUsed1;
|
|
76 |
if (!(8 + 4*1024*1024 <= diff && diff <= 16 + 4*1024*1024)) {
|
|
77 |
throw new IllegalStateException("Allocation did not change used space right: " + diff);
|
|
78 |
}
|
|
79 |
}
|
|
80 |
|
|
81 |
}
|