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*
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* 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
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
/*
* @test
* @bug 4990825
* @run main/othervm -XX:+UsePerfData PrologSizeSanityCheck
* @summary prolog size and overflow sanity checks
*/
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");
}
}
}