Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q8

[Lee Revell]

On Thu, 2004-09-02 at 03:15, Ingo Molnar wrote:
> * Lee Revell <rlrevell@xxxxxxxxxxx> wrote:
> 
> > Here are traces of a 145, 190, and 217 usec latencies in
> > netif_receive_skb:
> > 
> > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace2.txt
> > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace3.txt
> > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-Q6#/var/www/2.6.9-rc1-Q6/trace4.txt
> 
> these all seem to be single-packet processing latencies - it would be
> quite hard to make those codepaths preemptible.
> 
> i'd suggest to turn off things like netfilter and ip_conntrack (and
> other optional networking features that show up in the trace), they can
> only increase latency:
> 

Do you see any optional networking features in the trace (other than
ip_conntrack)?  I was under the impression that I had everything
optional disabled.

Lee  

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