Examples with ThreadMXBean java.lang.management.ThreadMXBean used on opensource projects

Example 46 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project sling by apache.

the class ThreadUsageHealthCheck method execute.

@Override
public Result execute() {
    FormattingResultLog log = new FormattingResultLog();
    log.debug("Checking threads for exceeding {}% CPU time within time period of {}ms", cpuTimeThresholdWarn, samplePeriodInMs);
    try {
        ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean();
        List<ThreadTimeInfo> threadTimeInfos = collectThreadTimeInfos(log, threadMxBean);
        Collections.sort(threadTimeInfos);
        float totalCpuTimePercentage = 0;
        for (int i = 0; i < threadTimeInfos.size(); i++) {
            ThreadTimeInfo threadInfo = threadTimeInfos.get(i);
            float cpuTimePercentage = ((float) threadInfo.getCpuTime() / ((float) samplePeriodInMs * 1000000)) * 100f;
            totalCpuTimePercentage += cpuTimePercentage;
            String msg = String.format("%4.1f", cpuTimePercentage) + "% used by thread \"" + threadInfo.name + "\"";
            if (i < 3 || (i < 10 && cpuTimePercentage > 15)) {
                log.info(msg);
            } else {
                log.debug(msg);
            }
        }
        log.info(threadTimeInfos.size() + " threads using " + String.format("%4.1f", totalCpuTimePercentage) + "% CPU Time");
        boolean isHighCpuTime = totalCpuTimePercentage > cpuTimeThresholdWarn;
        if (isHighCpuTime) {
            log.warn("Threads are consuming significant CPU time " + (cpuTimeThresholdWarnIsConfigured ? "(more than configured " + cpuTimeThresholdWarn + "% within " + samplePeriodInMs + "ms)" : "(more than " + availableProcessors + " cores * 90% = " + cpuTimeThresholdWarn + "%)"));
        }
        checkForDeadlock(log, threadMxBean);
    } catch (Exception e) {
        LOG.error("Could not analyse thread usage " + e, e);
        log.healthCheckError("Could not analyse thread usage", e);
    }
    return new Result(log);
}

Example 47 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project gerrit by GerritCodeReview.

the class ProcMetricModule method procJvmThread.

private void procJvmThread(MetricMaker metrics) {
    ThreadMXBean thread = ManagementFactory.getThreadMXBean();
    metrics.newCallbackMetric("proc/jvm/thread/num_live", Integer.class, new Description("Current live thread count").setGauge().setUnit("threads"), () -> thread.getThreadCount());
}

Example 48 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project jdk8u_jdk by JetBrains.

the class JvmThreadingImpl method checkJvmThreadContentionMonitoring.

/**
     * Checker for the "JvmThreadContentionMonitoring" variable.
     */
public void checkJvmThreadContentionMonitoring(EnumJvmThreadContentionMonitoring x) throws SnmpStatusException {
    //Can't be set externaly to unsupported state.
    if (JvmThreadContentionMonitoringUnsupported.intValue() == x.intValue()) {
        log.debug("checkJvmThreadContentionMonitoring", "Try to set to illegal unsupported value");
        throw new SnmpStatusException(SnmpDefinitions.snmpRspWrongValue);
    }
    if ((JvmThreadContentionMonitoringEnabled.intValue() == x.intValue()) || (JvmThreadContentionMonitoringDisabled.intValue() == x.intValue())) {
        // The value is valid, but is the feature supported ?
        ThreadMXBean mbean = getThreadMXBean();
        if (mbean.isThreadContentionMonitoringSupported())
            return;
        log.debug("checkJvmThreadContentionMonitoring", "Unsupported operation, can't set state");
        throw new SnmpStatusException(SnmpDefinitions.snmpRspInconsistentValue);
    }
    log.debug("checkJvmThreadContentionMonitoring", "Try to set to unknown value");
    throw new SnmpStatusException(SnmpDefinitions.snmpRspWrongValue);
}

Example 49 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project jdk8u_jdk by JetBrains.

the class JvmThreadInstanceEntryImpl method getJvmThreadInstBlockTimeMs.

/**
     * Getter for the "JvmThreadInstBlockTimeMs" variable.
     */
public Long getJvmThreadInstBlockTimeMs() throws SnmpStatusException {
    long l = 0;
    final ThreadMXBean tmb = JvmThreadingImpl.getThreadMXBean();
    if (tmb.isThreadContentionMonitoringSupported()) {
        l = info.getBlockedTime();
        //Monitoring is disabled
        if (l == -1)
            l = 0;
    }
    return new Long(l);
}

Example 50 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project jdk8u_jdk by JetBrains.

the class JvmThreadInstanceEntryImpl method getJvmThreadInstCpuTimeNs.

/**
     * Getter for the "JvmThreadInstCpuTimeNs" variable.
     */
public Long getJvmThreadInstCpuTimeNs() throws SnmpStatusException {
    long l = 0;
    final ThreadMXBean tmb = JvmThreadingImpl.getThreadMXBean();
    try {
        if (tmb.isThreadCpuTimeSupported()) {
            l = tmb.getThreadCpuTime(info.getThreadId());
            log.debug("getJvmThreadInstCpuTimeNs", "Cpu time ns : " + l);
            //Cpu time measurement is disabled or the id is not valid.
            if (l == -1)
                l = 0;
        }
    } catch (UnsatisfiedLinkError e) {
        // XXX Revisit: catch TO BE EVENTUALLY REMOVED
        log.debug("getJvmThreadInstCpuTimeNs", "Operation not supported: " + e);
    }
    return new Long(l);
}