internal void CheckForLongTurns()
{
if ((CurrentWorkItem == null && CurrentTask == null) ||
(Utils.Since(CurrentStateStarted) <= OrleansTaskScheduler.TurnWarningLengthThreshold))
{
return;
}
// Since this thread is running a long turn, which (we hope) is blocked on some IO
// or other external process, we'll create a replacement thread and tell this thread to
// exit when it's done with the turn.
// Note that we only do this if the current load is reasonably low and the current thread
// count is reasonably small.
if (!pool.InjectMoreWorkerThreads || pool.BusyWorkerCount >= MAX_THREAD_COUNT_TO_REPLACE ||
(Silo.CurrentSilo == null || !(Silo.CurrentSilo.Metrics.CpuUsage < MAX_CPU_USAGE_TO_REPLACE)))
{
return;
}
if (Cts.IsCancellationRequested)
{
return;
}
// only create a new thread once per slow thread!
Log.Warn(ErrorCode.SchedulerTurnTooLong2, string.Format(
"Worker pool thread {0} (ManagedThreadId={1}) has been busy for long time: {2}; creating a new worker thread",
Name, ManagedThreadId, GetThreadStatus()));
Cts.Cancel();
pool.CreateNewThread();
// Consider: mark the activation running a long turn to reduce it's time quantum
}
internal void CheckForLongTurns()
{
if (!IsFrozen())
{
return;
}
// Since this thread is running a long turn, which (we hope) is blocked on some IO
// or other external process, we'll create a replacement thread and tell this thread to
// exit when it's done with the turn.
// Note that we only do this if the current load is reasonably low and the current thread
// count is reasonably small.
if (!pool.ShouldInjectWorkerThread ||
!(this.performanceMetrics.CpuUsage < MAX_CPU_USAGE_TO_REPLACE))
{
return;
}
if (Cts.IsCancellationRequested)
{
return;
}
// only create a new thread once per slow thread!
Log.Warn(ErrorCode.SchedulerTurnTooLong2, string.Format(
"Worker pool thread {0} (ManagedThreadId={1}) has been busy for long time: {2}; creating a new worker thread",
Name, ManagedThreadId, GetThreadStatus(true)));
Cts.Cancel();
pool.CreateNewThread();
// Consider: mark the activation running a long turn to reduce it's time quantum
}