On Tue, Sep 25, 2007 at 11:57:37PM -0500, rezidue wrote: > 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? >
Order a 4.2 CD and install it as soon as you get it. 4.2 removed many bottlenecks in the network stack. In the meanwhile check out for the ip ifq len: # sysctl net.inet.ip.ifq net.inet.ip.ifq.len=0 net.inet.ip.ifq.maxlen=256 net.inet.ip.ifq.drops=0 I bet your drops are non 0 and the maxlen is to small (256 is a better value for gigabit firewalls/routers). -- :wq Claudio
