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

[Ingo Flaschberger]

Dear Paul,

>
> Dual Opteron 2212, Recompiled kernel with 7-STABLE and removed a lot of junk 
> in the config, added
> options         NO_ADAPTIVE_MUTEXES   not sure if that makes any difference 
> or not, will test without.
> Used ULE scheduler, used preemption, CPUTYPE=opteron in /etc/make.conf
> 7.0-STABLE FreeBSD 7.0-STABLE #4: Tue Jul  1 01:22:18 CDT 2008 amd64
> Max input rate .. 587kpps?   Take into consideration that these packets are 
> being forwarded out em1 interface which
> causes a great impact on cpu usage.  If I set up a firewall rule to block the 
> packets it can do over 1mpps on em0 input.

would be great if you can also test with 32bit.

what value do you have at net.inet.ip.intr_queue_maxlen?

kind regards,
 	Ingo Flaschberger