Very long wait on event after TDI_SEND

Hello,

I have very strange behaviour in my tdi client. Elapsed time in
KeWaitForSingleObject after IoCallDriver is almost exactly 200
milliseconds(usually 199 millisecond but time to time 398 millisecs)!
What may be the reason of such behaviour?

Event is set inside completion routine.


Best regards,
Sergey mailto:kipnis@wp.pl