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

[Ingo Flaschberger]

Dear Paul,

> I have been unable to even come close to livelocking the machine with the em 
> driver interrupt moderation.
> So that to me throws polling out the window.  I tried 8000hz with polling 
> modified to allow 10000 burst and it makes no difference

higher hz-values gives you better latenca but less overall speed.
2000hz should be enough.

Kind regards,
 	Ingo Flaschberger