Howto measure packets per seconds

[Thomas Vogt]

Hello

I try to do a benchmark with freebsd 5.x. It's for a routing project.
So i'm only interessted in max pps for the integrated GigE interface. 

I tried netperf. But netperf don't show me the max. limit of pps for
4kbyte packets (only interessted in small udp packets).
netstat -w 1 is not really usefull, because it doesn't show the real
limit.

Is there a way to measure the pps limit? Perhaps with netperf?

Regards,
Thomas