@Override
public void run() {
while (goOn) {
try {
long[] ids = ManagementFactory.getThreadMXBean().findDeadlockedThreads();
checkCount.incrementAndGet();
ids = ids == null ? new long[0] : ids;
if (ids.length > 0) {
deadlocked.addAll(asList(ids));
}
if (ids.length == 1) {
throw new RuntimeException("Found 1 deadlocked thread: " + ids[0]);
} else if (ids.length > 0) {
ThreadInfo[] infos =
ManagementFactory.getThreadMXBean().getThreadInfo(ids, Integer.MAX_VALUE);
System.err.println("Found " + ids.length + " deadlocked threads: ");
for (ThreadInfo inf : infos) {
System.err.println(inf.toString());
}
throw new RuntimeException("Found " + ids.length + " deadlocked threads");
}
Thread.sleep(100);
} catch (InterruptedException | RuntimeException x) {
fail(x);
}
}
}
@Override
public int run(String[] args) throws Exception {
Job job = new Job(conf);
job.setJarByClass(StatisticsGenerator.class);
job.setInputFormatClass(SequenceFileInputFormat.class);
job.setOutputFormatClass(SequenceFileOutputFormat.class);
SequenceFileInputFormat.addInputPath(job, new Path(args[0]));
SequenceFileOutputFormat.setOutputPath(job, new Path(args[1]));
job.setMapperClass(StatisticsMap.class);
job.setReducerClass(StatisticsReduce.class);
job.setMapOutputKeyClass(SortedMapWritableComparable.class);
job.setMapOutputValueClass(BytesWritable.class);
job.setNumReduceTasks(16);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(BytesWritable.class);
long startTime =
ManagementFactory.getThreadMXBean().getThreadCpuTime(Thread.currentThread().getId());
boolean success = job.waitForCompletion(true);
long endTime =
ManagementFactory.getThreadMXBean().getThreadCpuTime(Thread.currentThread().getId());
double duration = (endTime - startTime) / Math.pow(10, 9);
logger.info(
"=== Job Finished in " + duration + " seconds " + (success ? "(success)" : "(failure)"));
return success ? 0 : 1;
}
@RequiresNonNull("startupLogger")
private static void start(
File baseDir,
Map<String, String> properties,
@Nullable Instrumentation instrumentation,
@Nullable File glowrootJarFile)
throws Exception {
ManagementFactory.getThreadMXBean().setThreadCpuTimeEnabled(true);
ManagementFactory.getThreadMXBean().setThreadContentionMonitoringEnabled(true);
String version = Version.getVersion(MainEntryPoint.class);
String collectorHost = properties.get("glowroot.collector.host");
if (Strings.isNullOrEmpty(collectorHost)) {
collectorHost = System.getProperty("glowroot.collector.host");
}
Collector customCollector = loadCustomCollector(baseDir);
if (Strings.isNullOrEmpty(collectorHost) && customCollector == null) {
glowrootAgentInit = new GlowrootFatAgentInit();
} else {
if (customCollector != null) {
startupLogger.info("Using collector: {}", customCollector.getClass().getName());
}
glowrootAgentInit = new GlowrootThinAgentInit();
}
glowrootAgentInit.init(
baseDir,
collectorHost,
customCollector,
properties,
instrumentation,
glowrootJarFile,
version,
false);
startupLogger.info("Glowroot started (version {})", version);
}
public MemoryMonitor() {
LOG.info("initializing");
this.springContextId = "Unknown";
ManagementFactory.getThreadMXBean().setThreadContentionMonitoringEnabled(true);
ManagementFactory.getThreadMXBean().setThreadCpuTimeEnabled(true);
lowMemoryListener =
new NotificationListener() {
public void handleNotification(Notification n, Object hb) {
if (n.getType().equals(MemoryNotificationInfo.MEMORY_THRESHOLD_EXCEEDED)) {
Map<String, String> memoryUsageStatistics = new HashMap<String, String>();
memoryUsageStatistics.put(
"MemoryMXBean: " + MemoryType.HEAP,
ManagementFactory.getMemoryMXBean().getHeapMemoryUsage().toString());
memoryUsageStatistics.put(
"MemoryMXBean:" + MemoryType.NON_HEAP,
ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage().toString());
for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {
memoryUsageStatistics.put(
"MemoryPoolMXBean: " + pool.getType(), pool.getUsage().toString());
}
for (Listener listener : listeners) {
listener.memoryUsageLow(
springContextId,
memoryUsageStatistics,
Arrays.toString(
ManagementFactory.getThreadMXBean().findMonitorDeadlockedThreads()));
}
}
}
};
((NotificationEmitter) ManagementFactory.getMemoryMXBean())
.addNotificationListener(lowMemoryListener, null, null);
}
/** Uses reflection to get ThreadInfo with monitors & synchronizers. */
private static ThreadInfo[] getThreadInfo(long[] ids) {
try {
Method m =
ThreadMXBean.class.getDeclaredMethod(
"getThreadInfo", new Class[] {long[].class, boolean.class, boolean.class});
Object o = m.invoke(ManagementFactory.getThreadMXBean(), new Object[] {ids, true, true});
return (ThreadInfo[]) o;
} catch (Throwable t) {
}
// fallback to retrieving info w/o monitor & synchronizer info
return ManagementFactory.getThreadMXBean().getThreadInfo(ids, Integer.MAX_VALUE);
}
private void createRuntimeProps(MemberStateImpl memberState) {
Runtime runtime = Runtime.getRuntime();
ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean();
RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
ClassLoadingMXBean clMxBean = ManagementFactory.getClassLoadingMXBean();
MemoryMXBean memoryMxBean = ManagementFactory.getMemoryMXBean();
MemoryUsage heapMemory = memoryMxBean.getHeapMemoryUsage();
MemoryUsage nonHeapMemory = memoryMxBean.getNonHeapMemoryUsage();
Map<String, Long> map = new HashMap<String, Long>();
map.put(
"runtime.availableProcessors", Integer.valueOf(runtime.availableProcessors()).longValue());
map.put("date.startTime", runtimeMxBean.getStartTime());
map.put("seconds.upTime", runtimeMxBean.getUptime());
map.put("memory.maxMemory", runtime.maxMemory());
map.put("memory.freeMemory", runtime.freeMemory());
map.put("memory.totalMemory", runtime.totalMemory());
map.put("memory.heapMemoryMax", heapMemory.getMax());
map.put("memory.heapMemoryUsed", heapMemory.getUsed());
map.put("memory.nonHeapMemoryMax", nonHeapMemory.getMax());
map.put("memory.nonHeapMemoryUsed", nonHeapMemory.getUsed());
map.put("runtime.totalLoadedClassCount", clMxBean.getTotalLoadedClassCount());
map.put(
"runtime.loadedClassCount", Integer.valueOf(clMxBean.getLoadedClassCount()).longValue());
map.put("runtime.unloadedClassCount", clMxBean.getUnloadedClassCount());
map.put("runtime.totalStartedThreadCount", threadMxBean.getTotalStartedThreadCount());
map.put("runtime.threadCount", Integer.valueOf(threadMxBean.getThreadCount()).longValue());
map.put(
"runtime.peakThreadCount", Integer.valueOf(threadMxBean.getPeakThreadCount()).longValue());
map.put(
"runtime.daemonThreadCount",
Integer.valueOf(threadMxBean.getDaemonThreadCount()).longValue());
memberState.setRuntimeProps(map);
}
public class TimeTracker extends LinkedHashMap<String, Interval> {
private static final long serialVersionUID = 4253748581102583813L;
private final int nanosecondsPerMillisecond = 1000000;
private ThreadMXBean bean = ManagementFactory.getThreadMXBean();
protected long getTimeInMilliseconds() {
if (bean.isCurrentThreadCpuTimeSupported())
return bean.getCurrentThreadCpuTime() / nanosecondsPerMillisecond;
else return System.nanoTime() / nanosecondsPerMillisecond;
}
public void start(final String name) {
put(name, new Interval(getTimeInMilliseconds()));
}
public void end(final String name) {
get(name).setEnd(getTimeInMilliseconds());
}
public void outputTable(int width, PrintStream out) {
// Heading
for (final Entry<String, Interval> e : entrySet())
out.print(Strings.padStart(e.getKey(), width, ' ') + " ");
out.println();
// Values
for (final Entry<String, Interval> e : entrySet())
out.print(Strings.padStart(e.getValue().toString(), width, ' ') + " ");
out.println();
}
}
public static void main(String args[]) {
// get top-level thread group
ThreadGroup top = Thread.currentThread().getThreadGroup();
ThreadGroup parent;
do {
parent = top.getParent();
if (parent != null) top = parent;
} while (parent != null);
// get the thread count
int activeCount = top.activeCount();
Map<Thread, StackTraceElement[]> stackTraces = Thread.getAllStackTraces();
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
int threadCount = threadBean.getThreadCount();
long[] threadIds = threadBean.getAllThreadIds();
System.out.println("ThreadGroup: " + activeCount + " active thread(s)");
System.out.println("Thread: " + stackTraces.size() + " stack trace(s) returned");
System.out.println("ThreadMXBean: " + threadCount + " live threads(s)");
System.out.println("ThreadMXBean: " + threadIds.length + " thread Id(s)");
// check results are consistent
boolean failed = false;
if (activeCount != stackTraces.size()) failed = true;
if (activeCount != threadCount) failed = true;
if (activeCount != threadIds.length) failed = true;
if (failed) {
throw new RuntimeException("inconsistent results");
}
}
public void init(final ServletContext context, final Map<String, String> paras) {
_startTime = new Date();
_context = context;
_sipFactory = (SipFactory) context.getAttribute(ServletContextConstants.SIP_FACTORY);
_mrcpFactory = (MrcpFactory) context.getAttribute(ServletContextConstants.MRCP_FACTORY);
_appJarUrl =
_context.getRealPath("/")
+ "WEB-INF"
+ File.separator
+ "lib"
+ File.separator
+ "tropo.jar";
_cache = Collections.synchronizedMap(new WeakHashMap<Object, Application>());
_tmx = ManagementFactory.getThreadMXBean();
_mmx = ManagementFactory.getMemoryMXBean();
try {
_tropoBuildDate = Utils.getManifestAttribute(_appJarUrl, "Build-Date");
} catch (final IOException t) {
LOG.error(t.toString(), t);
_tropoBuildDate = "Unknown";
}
try {
_tropoVersionNo = Utils.getManifestAttribute(_appJarUrl, "Version-No");
} catch (final IOException t) {
LOG.error(t.toString(), t);
_tropoVersionNo = "Unknown";
}
try {
_tropoBuildNo = Utils.getManifestAttribute(_appJarUrl, "Build-No");
} catch (final IOException t) {
LOG.error(t.toString(), t);
_tropoBuildNo = "Unknown";
}
LOG.info(toString() + " / " + getVersionNo() + " / " + getBuildNo());
}
private void doThreadUpdates() {
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
long threadIds[] = threadMXBean.getAllThreadIds();
ThreadInfo[] threadInfos = threadMXBean.getThreadInfo(threadIds, 0);
int threadsNew = 0;
int threadsRunnable = 0;
int threadsBlocked = 0;
int threadsWaiting = 0;
int threadsTimedWaiting = 0;
int threadsTerminated = 0;
for (ThreadInfo threadInfo : threadInfos) {
// threadInfo is null if the thread is not alive or doesn't exist
if (threadInfo == null) continue;
Thread.State state = threadInfo.getThreadState();
if (state == NEW) {
threadsNew++;
} else if (state == RUNNABLE) {
threadsRunnable++;
} else if (state == BLOCKED) {
threadsBlocked++;
} else if (state == WAITING) {
threadsWaiting++;
} else if (state == TIMED_WAITING) {
threadsTimedWaiting++;
} else if (state == TERMINATED) {
threadsTerminated++;
}
}
metrics.setMetric("threadsNew", threadsNew);
metrics.setMetric("threadsRunnable", threadsRunnable);
metrics.setMetric("threadsBlocked", threadsBlocked);
metrics.setMetric("threadsWaiting", threadsWaiting);
metrics.setMetric("threadsTimedWaiting", threadsTimedWaiting);
metrics.setMetric("threadsTerminated", threadsTerminated);
}
/// The watcher thread - from the Runnable interface.
// This has to be pretty anal to avoid monitor lockup, lost
// threads, etc.
public synchronized void run() {
Thread me = Thread.currentThread();
me.setPriority(Thread.MAX_PRIORITY);
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
startTimeInNs = threadMXBean.getCurrentThreadCpuTime();
if (enabled.get()) {
do {
loop.set(false);
try {
wait(millis);
} catch (InterruptedException e) {
}
} while (enabled.get() && loop.get());
}
if (enabled.get() && targetThread.isAlive()) {
isDoneRunning.set(true);
printThread();
if (kill) {
logger.warn(
"Trying to kill thread with id:"
+ targetThread.getId()
+ " but did not as it can cause deadlocks etc.");
// targetThread.interrupt();
// targetThread.stop(); //Never kill thread - it can cause other problems
}
done();
isDoneRunning.set(false);
}
}
@Override
public void execute(OperationContext context, ModelNode operation)
throws OperationFailedException {
validator.validate(operation);
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
try {
long id = operation.require(PlatformMBeanConstants.ID).asLong();
ThreadInfo info = null;
if (operation.hasDefined(PlatformMBeanConstants.MAX_DEPTH)) {
info = mbean.getThreadInfo(id, operation.require(PlatformMBeanConstants.MAX_DEPTH).asInt());
} else {
info = mbean.getThreadInfo(id);
}
final ModelNode result = context.getResult();
if (info != null) {
result.set(PlatformMBeanUtil.getDetypedThreadInfo(info, mbean.isThreadCpuTimeSupported()));
}
} catch (SecurityException e) {
throw new OperationFailedException(new ModelNode().set(e.toString()));
}
context.completeStep();
}
public CPUClock() {
threadMXBean = ManagementFactory.getThreadMXBean();
if (!threadMXBean.isCurrentThreadCpuTimeSupported()) {
throw new IllegalStateException("Information about thread CPU times not supported");
}
}
/**
* Returns object of class ‘"proc_time"’ which is a numeric vector of length 5, containing the
* user, system, and total elapsed times for the currently running R process, and the cumulative
* sum of user and system times of any child processes spawned by it on which it has waited.
*
* <p>_The ‘user time’ is the CPU time charged for the execution of user instructions of the
* calling process. The ‘system time’ is the CPU time charged for execution by the system on
* behalf of the calling process._
*/
@Builtin("proc.time")
public static DoubleVector procTime() {
DoubleArrayVector.Builder result = new DoubleArrayVector.Builder();
StringVector.Builder names = new StringVector.Builder();
long totalCPUTime;
long userCPUTime;
long elapsedTime;
// There doesn't seem to be any platform-independent way of accessing
// CPU use for the whole JVM process, so we'll have to make do
// with the timings for the thread we're running on.
//
// Additionally, the MX Beans may not be available in all environments,
// so we need to fallback to app
try {
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
totalCPUTime = threadMXBean.getCurrentThreadCpuTime();
userCPUTime = threadMXBean.getCurrentThreadUserTime();
RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();
elapsedTime = runtimeMXBean.getUptime();
} catch (Error e) {
// ThreadMXBean is not available in all environments
// Specifically, AppEngine will throw variously SecurityErrors or
// ClassNotFoundErrors if we try to access these classes
userCPUTime = totalCPUTime = java.lang.System.nanoTime();
elapsedTime = new Date().getTime();
}
// user.self
names.add("user.self");
result.add(userCPUTime / NANOSECONDS_PER_SECOND);
// sys.self
names.add("sys.self");
result.add((totalCPUTime - userCPUTime) / NANOSECONDS_PER_SECOND);
// elapsed
// (wall clock time)
names.add("elapsed");
result.add(elapsedTime);
// AFAIK, we don't have any platform independent way of accessing
// this info.
// user.child
names.add("user.child");
result.add(0);
// sys.child
names.add("sys.child");
result.add(0);
result.setAttribute(Symbols.NAMES, names.build());
result.setAttribute(Symbols.CLASS, StringVector.valueOf("proc_time"));
return result.build();
}
public class Clock {
public interface IClock {
void start();
void stop();
long getDelta();
}
public static ThreadMXBean threadMX = ManagementFactory.getThreadMXBean();
// public static boolean canThreadCPU = threadMX.isCurrentThreadCpuTimeSupported();
public static boolean canThreadCPU = false;
public class ClockMX implements IClock {
public long startTime = 0;
public long timeDelta = 0;
@Override
public void start() {
this.startTime = threadMX.getCurrentThreadCpuTime();
}
@Override
public void stop() {
this.timeDelta = threadMX.getCurrentThreadCpuTime() - this.startTime;
}
@Override
public long getDelta() {
return this.timeDelta;
}
}
public class ClockNano implements IClock {
public long startTime = 0;
public long timeDelta = 0;
@Override
public void start() {
this.startTime = System.nanoTime();
}
@Override
public void stop() {
this.timeDelta = System.nanoTime() - this.startTime;
}
@Override
public long getDelta() {
return this.timeDelta;
}
}
public static IClock getNewClock() {
if (Clock.canThreadCPU) return new Clock().new ClockMX();
else return new Clock().new ClockNano();
}
}
@IgnoreJRERequirement
public static ThreadInfo[] getThreadInfos() {
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
return mbean.getThreadInfo(
mbean.getAllThreadIds(),
mbean.isObjectMonitorUsageSupported(),
mbean.isSynchronizerUsageSupported());
}
@Override
public void verify(QueryContext context, String queryString) {
if (!context.getSession().isAdmin()) throw new QueryParseException("95050", -1, -1, null);
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
if (!bean.isThreadCpuTimeSupported()) throw new QueryParseException("95051", -1, -1, null);
if (!bean.isThreadCpuTimeEnabled()) throw new QueryParseException("95051", -1, -1, null);
}
public static void main(String[] args) {
// 获取Java线程管理MXBean
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(false, false);
for (ThreadInfo threadInfo : threadInfos) {
System.out.println("[" + threadInfo.getThreadId() + " ] " + threadInfo.getThreadName());
}
}
private static void runExecutionBoundedTest(int nthreads, List<Counter> counters, int nexecutions)
throws InterruptedException {
final List<CounterThread> threads = new ArrayList<CounterThread>();
for (int i = 0; i < nthreads; i++) {
CounterThread t;
t = new CounterThread(counters.get(i % counters.size()), nexecutions);
t.start();
threads.add(t);
}
CounterThread.shoot(); // let all the threads go crazy at the same time
for (int i = 0; i < nthreads; i++) {
CounterThread t = threads.get(i);
t.join(30000);
if (t.isAlive()) {
System.out.println("stuck thread name: " + t.toString());
System.out.println("stuck thread state: " + t.getState());
safe.ReentrantLock l = (safe.ReentrantLock) t.getLock();
System.out.println("thread waiting lock: " + l);
System.out.println("stuck thread increments: " + t.getExecutions());
System.out.println("stuck thread counter value: " + t.getCounterCount());
Thread other = l.getOwner();
System.out.println("lock owner: " + other);
if (other != null) {
System.out.println("owner name: " + other.toString());
System.out.println("state owner: " + other.getState());
}
// Keep program alive to dump thread stacks with: jstack -l $(pidof java)
System.out.println(
java.lang.management.ManagementFactory.getThreadMXBean().getPeakThreadCount());
while (true) {}
}
}
long sum = 0;
for (int i = 0; i < counters.size(); ++i) {
sum += counters.get(i).getCount();
}
System.out.println(sum);
System.out.println(
java.lang.management.ManagementFactory.getThreadMXBean().getPeakThreadCount());
}
public void testComparison() throws Exception {
ThreadMXBean bean = (ThreadMXBean) ManagementFactory.getThreadMXBean();
Random random = new SecureRandom();
Long[] keys = new Long[ITERATIONS];
String[] values = new String[ITERATIONS];
for (int i = 0; i < keys.length; i++) {
keys[i] = random.nextLong();
values[i] = "value-" + random.nextLong();
}
long id = Thread.currentThread().getId();
for (int n = 0; n < 10; n++) {
ArrayPositionCache<String> cache = new ArrayPositionCache<String>(100);
LeastRecentlyUsedMap<Long, String> map = new LeastRecentlyUsedMap<Long, String>(100);
System.gc();
Thread.sleep(100);
long memoryStart1 = bean.getThreadAllocatedBytes(id);
long start1 = System.currentTimeMillis();
for (int i = 0; i < values.length; i++) {
cache.cache(keys[i], values[i]);
}
long finish1 = System.currentTimeMillis();
long memoryFinish1 = bean.getThreadAllocatedBytes(id);
System.gc();
Thread.sleep(100);
long memoryStart2 = bean.getThreadAllocatedBytes(id);
long start2 = System.currentTimeMillis();
for (int i = 0; i < values.length; i++) {
map.put(keys[i], values[i]);
}
long finish2 = System.currentTimeMillis();
long memoryFinish2 = bean.getThreadAllocatedBytes(id);
System.err.println(
"PositionCache time="
+ (finish1 - start1)
+ " memory="
+ (memoryFinish1 - memoryStart1));
System.err.println(
"LeastRecentlyUsedMap time="
+ (finish2 - start2)
+ " memory="
+ (memoryFinish2 - memoryStart2));
Set<Long> currentKeys = map.keySet(); // reconcile the keys
for (Long currentKey : currentKeys) {
assertNotNull(map.get(currentKey));
assertNotNull(cache.fetch(currentKey));
assertEquals(cache.fetch(currentKey), map.get(currentKey));
}
}
}
public void testResolutionUser() {
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
int count = 0;
long startTime = threadBean.getCurrentThreadUserTime();
long stopTime = threadBean.getCurrentThreadUserTime();
while (stopTime == startTime) {
stopTime = threadBean.getCurrentThreadUserTime();
count++;
}
System.out.println(
"Resolution via UserTime: " + (stopTime - startTime) + "ns in " + count + " iterations.");
}
public static String threadDump() {
StringBuilder threadDump = new StringBuilder();
ThreadMXBean threadMx = ManagementFactory.getThreadMXBean();
if (threadMx.isObjectMonitorUsageSupported() && threadMx.isSynchronizerUsageSupported()) {
// Print lock info if, and only if, both object monitor usage and synchronizer usage are
// supported.
dumpThreadInfo(threadDump, true, threadMx);
} else {
dumpThreadInfo(threadDump, false, threadMx);
}
return threadDump.toString();
}
@Override
public void query(QueryContext context, String queryString, MetadataCallback callback) {
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
ArrayList<ThreadCpuUsage> usages = new ArrayList<ThreadCpuUsage>();
for (long tid : bean.getAllThreadIds()) {
long time = bean.getThreadCpuTime(tid);
usages.add(new ThreadCpuUsage(tid, time));
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
Map<Thread, StackTraceElement[]> stacks = Thread.getAllStackTraces();
for (long tid : bean.getAllThreadIds()) {
ThreadCpuUsage usage = find(usages, tid);
if (usage != null) usage.secondTime = bean.getThreadCpuTime(tid);
}
Collections.sort(usages);
for (ThreadCpuUsage usage : usages) {
long elapsed = usage.secondTime - usage.firstTime;
// remove just created thread or sleeping threads (noisy)
if (elapsed <= 0) continue;
StringBuilder sb = new StringBuilder();
Thread t = findThread(stacks, usage.tid);
if (t == null) continue;
StackTraceElement[] stack = findStack(stacks, usage.tid);
for (StackTraceElement el : stack) {
sb.append(
String.format(
"%s.%s %s\n", el.getClassName(), el.getMethodName(), getFileAndLineNumber(el)));
}
Map<String, Object> m = new HashMap<String, Object>();
m.put("tid", t.getId());
m.put("name", t.getName());
m.put("state", t.getState().toString());
m.put("priority", t.getPriority());
m.put("usage", elapsed);
m.put("stacktrace", sb.toString());
callback.onPush(new Row(m));
}
}
public static Thread[] getAllThreads() {
final ThreadGroup root = getRootThreadGroup();
final ThreadMXBean thbean = ManagementFactory.getThreadMXBean();
int nAlloc = thbean.getThreadCount();
int n = 0;
Thread[] threads;
do {
nAlloc *= 2;
threads = new Thread[nAlloc];
n = root.enumerate(threads, true);
} while (n == nAlloc);
return threads;
}
/** Constructor */
public ThreadMeasurement() {
threadsInfo = null;
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
threadIds = threadBean.getAllThreadIds();
threadsInfo = threadBean.getThreadInfo(threadIds, THREAD_TRACE_DEPTH);
threadCount = threadIds.length;
threadNames = new String[threadCount];
for (int i = 0; i < threadCount; i++) {
if (threadsInfo[i] != null) threadNames[i] = threadsInfo[i].getThreadName();
}
} // Constructor end
public DataBuffer getServerStatus(int version) {
DataBuffer buffer = new DataBuffer();
// system info
double cpu = roundToDecimals(cpuMonitor.getCpuUsage() * 100, 2);
long freeMem = Runtime.getRuntime().freeMemory();
long maxMem = Runtime.getRuntime().maxMemory();
long totalMem = Runtime.getRuntime().totalMemory();
buffer.writeDouble(cpu);
buffer.writeLong(freeMem);
buffer.writeLong(maxMem);
buffer.writeLong(totalMem);
// threads list
long totalThreadsCpuTime = 0;
long[] threadIds = ManagementFactory.getThreadMXBean().getAllThreadIds();
buffer.writeInt(threadIds.length); // 多少条线程.
for (int i = 0; i < threadIds.length; i++) {
long id = threadIds[i];
String name = ManagementFactory.getThreadMXBean().getThreadInfo(id).getThreadName();
long cpuTime = 0;
if (ManagementFactory.getThreadMXBean().isThreadCpuTimeSupported()
&& ManagementFactory.getThreadMXBean().isThreadCpuTimeEnabled()) {
cpuTime = ManagementFactory.getThreadMXBean().getThreadCpuTime(id);
totalThreadsCpuTime += cpuTime;
}
buffer.writeLong(id);
buffer.writeString(name);
buffer.writeLong(cpuTime);
}
buffer.writeLong(totalThreadsCpuTime);
return buffer;
}
public void testTakeCPUTime() {
ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
if (!mbean.isThreadCpuTimeEnabled()) {
fail("ThreadMXBean CPU time reporting is not enabled");
}
long msecMultiplier = 1000 * 1000;
long msecGoal = 10;
long cpuGoal = msecGoal * msecMultiplier;
long beforeCPU = mbean.getCurrentThreadCpuTime();
MyMetricFunctions.takeCPUTime(cpuGoal);
long afterCPU = mbean.getCurrentThreadCpuTime();
assertTrue((afterCPU - beforeCPU) > cpuGoal);
}
/** Count the number of threads that have a stack frame containing the given string */
private static int countThreads(String search) {
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
int count = 0;
ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);
for (ThreadInfo info : infos) {
if (info == null) continue;
for (StackTraceElement elem : info.getStackTrace()) {
if (elem.getClassName().contains(search)) {
count++;
break;
}
}
}
return count;
}
private String threadDumpDescription() {
StringBuilder threadDumpDescription = new StringBuilder();
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true);
for (ThreadInfo threadInfo : threadInfos) {
threadDumpDescription.append(
format(
"\"%s\"%n\tjava.lang.Thread.State: %s",
threadInfo.getThreadName(), threadInfo.getThreadState()));
for (StackTraceElement stackTraceElement : threadInfo.getStackTrace()) {
threadDumpDescription.append(LINE_SEPARATOR + "\t\tat " + stackTraceElement);
}
threadDumpDescription.append(LINE_SEPARATOR + LINE_SEPARATOR);
}
return threadDumpDescription.toString();
}
/**
* A total hack to see if there are any active Java3D threads running
*
* @return any java3d threads running
*/
private static boolean anyJava3dThreadsActive() {
ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
long[] ids = threadBean.getAllThreadIds();
for (int i = 0; i < ids.length; i++) {
ThreadInfo info = threadBean.getThreadInfo(ids[i], Integer.MAX_VALUE);
if (info == null) {
continue;
}
if (info.getThreadState() != Thread.State.RUNNABLE) {
continue;
}
if (info.getThreadName().indexOf("J3D") >= 0) {
return true;
}
}
return false;
}
