Example usage for java.lang.management ThreadMXBean getThreadUserTime

Introduction

In this page you can find the example usage for java.lang.management ThreadMXBean getThreadUserTime.

Prototype

public long getThreadUserTime(long id);

Source Link

Document

Returns the CPU time that a thread of the specified ID has executed in user mode in nanoseconds.

Usage

From source file:com.streamsets.datacollector.restapi.AdminResource.java

@GET
@Path("/threads")
@ApiOperation(value = "Returns Thread Dump along with stack trace", response = Map.class, responseContainer = "List", authorizations = @Authorization(value = "basic"))
@Produces(MediaType.APPLICATION_JSON)/*  w  ww  .ja va  2  s .c  o m*/
@RolesAllowed({ AuthzRole.ADMIN, AuthzRole.ADMIN_REMOTE })
public Response getThreadsDump() throws IOException {
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] threads = threadMXBean.dumpAllThreads(true, true);
    List<Map> augmented = new ArrayList<>(threads.length);
    for (ThreadInfo thread : threads) {
        Map<String, Object> map = new LinkedHashMap<>();
        map.put("threadInfo", thread);
        map.put("userTimeNanosecs", threadMXBean.getThreadUserTime(thread.getThreadId()));
        map.put("cpuTimeNanosecs", threadMXBean.getThreadCpuTime(thread.getThreadId()));
        augmented.add(map);
    }
    return Response.ok(augmented).build();
}

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From source file:com.twosigma.beakerx.kernel.magic.command.functionality.TimeMagicCommand.java

public MagicCommandOutput time(String codeToExecute, Message message, int executionCount, boolean showResult) {
    CompletableFuture<TimeMeasureData> compileTime = new CompletableFuture<>();

    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    long currentThreadId = Thread.currentThread().getId();

    Long startWallTime = System.nanoTime();
    Long startCpuTotalTime = threadMXBean.getCurrentThreadCpuTime();
    Long startUserTime = threadMXBean.getCurrentThreadUserTime();

    SimpleEvaluationObject simpleEvaluationObject = createSimpleEvaluationObject(codeToExecute, kernel, message,
            executionCount);/*from  ww w.  j  ava2  s . c  om*/
    if (!showResult) {
        simpleEvaluationObject.noResult();
    }

    TryResult either = kernel.executeCode(codeToExecute, simpleEvaluationObject);

    Long endWallTime = System.nanoTime();
    Long endCpuTotalTime = threadMXBean.getThreadCpuTime(currentThreadId);
    Long endUserTime = threadMXBean.getThreadUserTime(currentThreadId);

    compileTime.complete(new TimeMeasureData(endCpuTotalTime - startCpuTotalTime, endUserTime - startUserTime,
            endWallTime - startWallTime));
    String messageInfo = "CPU times: user %s, sys: %s, total: %s \nWall Time: %s\n";

    try {
        TimeMeasureData timeMeasuredData = compileTime.get();

        return new MagicCommandOutput(MagicCommandOutput.Status.OK,
                String.format(messageInfo, format(timeMeasuredData.getCpuUserTime()),
                        format(timeMeasuredData.getCpuTotalTime() - timeMeasuredData.getCpuUserTime()),
                        format(timeMeasuredData.getCpuTotalTime()), format(timeMeasuredData.getWallTime())),
                either, simpleEvaluationObject);

    } catch (InterruptedException | ExecutionException e) {
        return new MagicCommandOutput(MagicCommandOutput.Status.ERROR,
                "There occurs problem during measuring time for your statement.");
    }
}

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From source file:net.bull.javamelody.internal.model.JavaInformations.java

public static List<ThreadInformations> buildThreadInformationsList() {
    final ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    final Map<Thread, StackTraceElement[]> stackTraces = Thread.getAllStackTraces();
    final List<Thread> threads = new ArrayList<Thread>(stackTraces.keySet());

    // si "1.6.0_01".compareTo(Parameters.JAVA_VERSION) > 0;
    // on rcuprait les threads sans stack trace en contournant bug 6434648 avant 1.6.0_01
    // http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6434648
    // hormis pour le thread courant qui obtient sa stack trace diffremment sans le bug
    //      threads = getThreadsFromThreadGroups();
    //      final Thread currentThread = Thread.currentThread();
    //      stackTraces = Collections.singletonMap(currentThread, currentThread.getStackTrace());

    final boolean cpuTimeEnabled = threadBean.isThreadCpuTimeSupported() && threadBean.isThreadCpuTimeEnabled();
    final long[] deadlockedThreads = getDeadlockedThreads(threadBean);
    final List<ThreadInformations> threadInfosList = new ArrayList<ThreadInformations>(threads.size());
    // hostAddress rcupr ici car il peut y avoir plus de 20000 threads
    final String hostAddress = Parameters.getHostAddress();
    for (final Thread thread : threads) {
        final StackTraceElement[] stackTraceElements = stackTraces.get(thread);
        final List<StackTraceElement> stackTraceElementList = stackTraceElements == null ? null
                : new ArrayList<StackTraceElement>(Arrays.asList(stackTraceElements));
        final long cpuTimeMillis;
        final long userTimeMillis;
        if (cpuTimeEnabled) {
            cpuTimeMillis = threadBean.getThreadCpuTime(thread.getId()) / 1000000;
            userTimeMillis = threadBean.getThreadUserTime(thread.getId()) / 1000000;
        } else {/*from w  w w  . j  av  a2  s  .  c  om*/
            cpuTimeMillis = -1;
            userTimeMillis = -1;
        }
        final boolean deadlocked = deadlockedThreads != null
                && Arrays.binarySearch(deadlockedThreads, thread.getId()) >= 0;
        // stackTraceElementList est une ArrayList et non unmodifiableList pour lisibilit xml
        threadInfosList.add(new ThreadInformations(thread, stackTraceElementList, cpuTimeMillis, userTimeMillis,
                deadlocked, hostAddress));
    }
    // on retourne ArrayList et non unmodifiableList pour lisibilit du xml par xstream
    return threadInfosList;
}

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