FreeBSD boxes as a 'router'...

[Adrian Chadd]

Ok, so since people are talking about it, and i've been knee deep in
at least the older intel gige interrupt moderation - at maximum pps,
how exactly is the interrupt moderation giving you a livelock
scenario?

The biggest benefit I found when doing some forwarding work a few
years ago was to write a little daemon that actually sat there and
watched the interrupt rates and packet drop rates per-interface - and
then tuned the interrupt moderation parameters to suit. So at the
highest pps rates I wasn't swamped with interrupts.

I think polling here is hiding some poor choices in driver design and
network stack design..



adrian