| /* |
| * 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"); |
| } |
| } |
| } |