1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/*
* Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4990825
* @summary prolog size and overflow sanity checks
*
* @run main/othervm -XX:+UsePerfData PrologSizeSanityCheck
*/
import sun.jvmstat.monitor.*;
public class PrologSizeSanityCheck {
private static final String sizeName = "sun.perfdata.size";
private static final String usedName = "sun.perfdata.used";
private static final String overflowName = "sun.perfdata.overflow";
private static final int K = 1024;
public static void main(String args[]) throws Exception {
VmIdentifier vmid = new VmIdentifier("0");
MonitoredHost localhost = MonitoredHost.getMonitoredHost("localhost");
MonitoredVm self = localhost.getMonitoredVm(vmid);
IntegerMonitor prologSize = (IntegerMonitor)self.findByName(sizeName);
IntegerMonitor prologUsed = (IntegerMonitor)self.findByName(usedName);
IntegerMonitor prologOverflow =
(IntegerMonitor)self.findByName(overflowName);
if (prologOverflow.intValue() != 0) {
throw new RuntimeException("jvmstat memory buffer overflow: "
+ sizeName + "=" + prologSize.intValue()
+ usedName + "=" + prologUsed.intValue()
+ overflowName + "=" + prologOverflow.intValue()
+ " : PerfDataMemorySize must be increased");
}
if (prologUsed.intValue() + 3*K >= prologSize.intValue()) {
/*
* we want to leave at least 3K of space to allow for long
* string names in the various path oriented strings and for
* the command line argument and vm argument strings. 3K is
* somewhat of an arbitrary figure, but it is based on failure
* scenarios observed in SQE when jvmstat was originally
* introduced in 1.4.1.
*/
throw new RuntimeException(
"jvmstat memory buffer usage approaching size: "
+ sizeName + "=" + prologSize.intValue()
+ usedName + "=" + prologUsed.intValue()
+ " : consider increasing PerfDataMemorySize");
}
}
}
|
