DP performance

Marko Zec zec at icir.org
Thu Dec 1 13:36:24 PST 2005

On Thursday 01 December 2005 18:15, Matthew Dillon wrote:
>     I don't know what the issue you bring up with the Linux kernels
> is, but at GigE speeds the ethernet hardware is actually
> flow-controlled. There should not be any packet loss even if the cpu
> cannot keep up with a full-bandwidth packet stream.   There is
> certainly no need to fast-path the network interrupt, it simply needs
> to be processed in a reasonable period of time.  A few milliseconds
> of latency occuring every once in a while would not have any adverse
> effect.

A few milliseconds of latency / jitter can sometimes completely kill TCP 
throughput at gigabit speeds.  A few microseconds won't matter, though.



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