FreeBSD polling mode - count 'lost' packets?

[Karl Pielorz]

Hi All,

We've been running a number of FreeBSD boxes with high packet throughputs 
using polling mode.

This seems to work great (gets rid of 90k odd interrupts a second).

Is there any easy way of finding out how many packets are being 'dropped' 
in this system? (We use em Intel Pro 1000TX cards) - as obviously, there is 
a finite limit to the number of packets the system can push - is there any 
mechanism, or flag, or anything that will warn you if by the time the 
drivers get to poll the card, it's overflowed/lost packets?

Thanks,

-Karl