I've been having problems with throughput on a box I'm using as an edge
gateway. I can't seem to get it to push out more than 150Mb/sec at about
20k pps. It's a Tyan Thunder K8SR (S2881) board that has two gig broadcom
interfaces on a shared pci-x bus. It's on the bcm5704c chipset and I'm
running OpenBSD 4.0. The machine has two dual core amd opteron chips and
two gigs of ram. Barley any resources are being used when we are peaking
during the day. When we hit around 140+Mb/sec I start seeing packet loss
and when I copy a file from this machine via scp to another host over the
gig lan I can see that it directly affects throughput. I've spent all day
trying to find the problem but I've had no luck. Any ideas? Any info I can
provide?
