public static Task Delay(int millisecondsDelay, CancellationToken cancellationToken)
{
var source = new TaskCompletionSource <object>();
var delayed = TaskMonitorService.GetService().Delay((long)millisecondsDelay, source);
if (cancellationToken != CancellationToken.None)
{
cancellationToken.Register(() =>
{
delayed.Cancel(false);
source.SetCanceled();
});
}
return(source.Task);
}
private void ScheduleCheckThreadCount()
{
VerboseLog("{0:000}|ScheduleCheckThreadCount: CoreSize: {1} maxSize: {2} queuelen: {3}; active {4}; pool size: {5}; futureDelay: {7}s; future: {6};",
Thread.CurrentThread.Id, _threadPool.CorePoolSize, _threadPool.MaximumPoolSize, _threadPool.Queue.Size(), _threadPool.ActiveCount, _threadPool.PoolSize,
_checkIncreaseThreadCount, _checkIncreaseThreadCount != null?_checkIncreaseThreadCount.GetDelay(TimeUnit.SECONDS).ToString(): "-");
// since ActiveCount might not be accurate, perform the check with a margin.
if (_threadPool.ActiveCount < _threadPool.CorePoolSize - 1 ||
_threadPool.CorePoolSize >= _threadPool.MaximumPoolSize)
{
return;
}
if (_checkIncreaseThreadCount == null)
{
var future = TaskMonitorService.GetService().Delay(30000L, CheckThreadCount);
bool setValue = Interlocked.CompareExchange(ref _checkIncreaseThreadCount, future, null) == null;
if (!setValue)
{
future.Cancel(false);
}
}
}
