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

Kip Macy kip.macy at
Tue Jul 8 08:19:11 UTC 2008

>> I have a pre-production card. With some bug fixes and some tuning of
>> interrupt handling (custom stack - I've been asked to push the changes
>> back in to CVS, I just don't have time right now) an otherwise
>> unoptimized igb can forward 1.04Mpps from one port to another (1.04
>> Mpps in  on igb0 and 1.04 Mpps out on igb1) using 3.5 cores on an 8
>> core system.
> Is this on 1gbps or on 10gbps NIC?

Hi Stefan,
The hardware that igb supports is just the latest revision of the
hardware supported by em, i.e. it is 1gbps.


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