On Tue, Jan 22, 2013 at 04:02:04PM +0100, Patrick Vultier wrote: > Hi, > > I tried to use two OpenBSD systems as network load with iperf and netperf. > > Each server is equipped with two Intel dual NIC gigabit (plus one > embedded gigabit NIC), two Xeon 3.2GHz H.T., 12GB RAM and OpenBSD 5.2 > i386. > > My problem, I can't exceed ~ 870Mbps with multiple interface as > reported in the experiments (see below). > (PF was disabled for all experiment). > > Why am I blocked at ~ 1Gbps limit ? Is this normal ? > EM drivers ? Kernel performance ? ... ? > > Thanks for your help. > Xinform3n <snip>
trunk loadbalance ports handle traffic in a specific way. The logaritm is based on source <-> destination hashes by default and it keeps them over the a single interface, till interface is dropped. If you want to maximize thru put you need to use round robin logaritm on both ends. If you only do it on OpenBSD it will cause multiple links used for sending but selective for recieving. And 870 Mbps is a respectible speed for a gig card. Regards Robert
