> I meant check the CPU usage while measuring, it could be the same > issue. I have an Ultra 5 on my desk but I still didn't have to time > to install obsd and test iperf. > > Besides, in order for someone else more knowledgeable to respond > you should atleast include a dmesg. And some more info, like specs > of the box that's running iperf server.
And reyk@ reported a few issues with gigabit links as well. I'm looking at things.