[TriLUG] SMP packet latency question

[Glen Ford]

Glen Ford wrote:
> 
> Using webstone I am generating traffic through an Iptables firewall.
> The firewall is a Compaq 580 with two 700mhz cpu.
> I can push more packets per second with I remove one of the cpu's.
> With one cpu the system is about 80% idle
> 
> When I use both cpus, looks like majority of system time is spent
> processing interupts
> System is about 5% idle
> Anyone got any ideas why I am see this behavior?
> How I can make the two cpu config process packet as well or better than
> single cpu config?
> 
> Thanks,
> /Glen
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Looks like I found problem. 
Change NIC cards Went from eerpro100
to de4x5 driver
Now pushing packets just fine with two cpus

-- 
Glen Ford
Sr. Security Engineer Administrator
Procinct  Ltd.
gford at procinct.com