Freebsd IP Forwarding performance (question, and some info) [7-stable, current, em, smp]

Stefan Lambrev stefan.lambrev at
Tue Jul 1 08:49:00 UTC 2008

Steve Bertrand wrote:
> Support (Rudy) wrote:
>> Ingo Flaschberger wrote:
>>> usually interface polling is also chosen to prevent "lock-ups".
>>> man polling
>> I used polling in FreeBSD 5.x and it helped a bunch.  I set up a new 
>> router with 7.0 and MSI was recommended to me.  (I noticed no 
>> difference when moving from polling -> MSI, however, on 5.4 polling 
>> seemed to help a lot.  
> I'm curious now... how do you change individual device polling via 
> sysctl?
Using sysctl for polling is deprecated I think.
You can do it with ifconfig ifX polling (-polling)
you can add polling in rc.conf options also:
ifconfig_em0="polling up" #bridged interface in my conf

> Steve
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Best Wishes,
Stefan Lambrev
ICQ# 24134177

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