77 lines
3.1 KiB
Java
77 lines
3.1 KiB
Java
/*
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* Copyright (c) 2004, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4990825
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* @summary prolog size and overflow sanity checks
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*
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* @run main/othervm -XX:+UsePerfData PrologSizeSanityCheck
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*/
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import sun.jvmstat.monitor.*;
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public class PrologSizeSanityCheck {
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private static final String sizeName = "sun.perfdata.size";
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private static final String usedName = "sun.perfdata.used";
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private static final String overflowName = "sun.perfdata.overflow";
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private static final int K = 1024;
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public static void main(String args[]) throws Exception {
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VmIdentifier vmid = new VmIdentifier("0");
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MonitoredHost localhost = MonitoredHost.getMonitoredHost("localhost");
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MonitoredVm self = localhost.getMonitoredVm(vmid);
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IntegerMonitor prologSize = (IntegerMonitor)self.findByName(sizeName);
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IntegerMonitor prologUsed = (IntegerMonitor)self.findByName(usedName);
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IntegerMonitor prologOverflow =
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(IntegerMonitor)self.findByName(overflowName);
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if (prologOverflow.intValue() != 0) {
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throw new RuntimeException("jvmstat memory buffer overflow: "
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+ sizeName + "=" + prologSize.intValue()
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+ usedName + "=" + prologUsed.intValue()
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+ overflowName + "=" + prologOverflow.intValue()
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+ " : PerfDataMemorySize must be increased");
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}
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if (prologUsed.intValue() + 3*K >= prologSize.intValue()) {
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/*
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* we want to leave at least 3K of space to allow for long
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* string names in the various path oriented strings and for
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* the command line argument and vm argument strings. 3K is
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* somewhat of an arbitrary figure, but it is based on failure
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* scenarios observed in SQE when jvmstat was originally
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* introduced in 1.4.1.
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*/
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throw new RuntimeException(
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"jvmstat memory buffer usage approaching size: "
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+ sizeName + "=" + prologSize.intValue()
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+ usedName + "=" + prologUsed.intValue()
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+ " : consider increasing PerfDataMemorySize");
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}
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}
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}
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