Hello mates!

I just tested the network throughput of my new PoV ION 230 Mainboard with iperf. For this test I installed Ubuntu 9.10 on an USB stick. Furthermore the board is equiped with 512MB RAM.

Although the processor doesn't exceed the ~60% mark (likewise the RAM) the throughput won't exceed the 55MB/s mark.

What are the reasons for this limitation? The system itself doesn't seem to be overloaded at this point but it won't provide a higher throughput.

Regards
OK

what are you using for an mtu?

Standart value - 1500. But if you're targeting jumbo frames I can report from my experinece, that jumbo frames don't accomplish wonders. They're useful for special services and maybe rise the throughput if the cpu is overloaded. But as I wrote either the CPU nor the RAM are really exhausted.

Anyway, the current driver (or the NIC component of the ION chipset itself) don't seem to support jumbo frames.

But if I change the r/w-buffer clientside to 32KB I get results arround 100MB/s with a marginally higher cpu/ram load. That's serious in my eyes because the client is running on a Win7 high end machine and I don't really understand the preformance boost through this clientside change.