incoming packet latency in 2.4.[18-20]

[Chris Friesen]

There is an issue with incoming packet latency in the kernels mentioned.

It seems that if you send in a burst of messages, the amount of time it 
takes to wake the listening process is dependent on the size of the 
message burst.  2.4.18-2.4.20 all show this behaviour, 2.6 doesn't.

Some numbers for a udp message size of 2 bytes:

1 packet, average latency 12 usecs
10 packets, average latency 66 usecs
100 packets, average latency 477 usecs

Is this a known issue?  Is there an easy way to fix this, or is it 
something inherent in the 2.4 architecture?

Thanks,

Chris

--
Chris Friesen                    | MailStop: 043/33/F10
Nortel Networks                  | work: (613) 765-0557
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