You shouldn’t change that value in the registry. Remember that it is the
server machine’s delay ack setting that is the issue here.
What I would do is setup a completion routine on your TDI_SEND IRP and
in the completion routine handle any cleanup you need to do.
The only synchronization you need is if you access a shared resource
in the sending thread and the thread that services your completion
routine.
-Jeff
-----Original Message-----
From: Sergey Kipnis [mailto:kipnis@wp.pl]
Sent: Monday, June 23, 2003 1:40 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Very long wait on event after TDI_SEND
Hello Jeffrey,
Monday, June 23, 2003, 6:29:57 PM, you wrote:
And what to do with delayed ack? How to change this behaviour from the
driver? Of course, I could change this in registry
=====================================================
Delayed ACKs reduce the number of packets sent on the network. An ACK
is only sent when either of the following occurs:
-
No ACK was sent for the previously received segment.
-
No segment arrives within 200 milliseconds (the default), after
receiving a segment.
=====================================================
This means that changing ACK delay time to zero is not very good idea.
CJ> Sounds like a delayed ack to me.
CJ> -Jeff
CJ> -----Original Message-----
CJ> From: Sergey Kipnis [mailto:kipnis@wp.pl]
CJ> Sent: Monday, June 23, 2003 12:26 PM
CJ> To: NT Developers Interest List
CJ> Subject: [ntdev] Very long wait on event after TDI_SEND
CJ> Hello,
CJ> I have very strange behaviour in my tdi client. Elapsed time in
CJ> KeWaitForSingleObject after IoCallDriver is almost exactly 200
CJ> milliseconds(usually 199 millisecond but time to time 398 millisecs)!
CJ> What may be the reason of such behaviour?
CJ> Event is set inside completion routine.
–
Best regards,
Sergey mailto:kipnis@wp.pl
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