[ofa-general] ipoib performanec at smaller mtu

[Benjamin M. McClelland]

I was curious what other people are seeing for 1500 mtu performance on
ipoib.  Current tests are showing that I get about 150-175MB/s no matter
how many streams.  If I go up to higher mtu, then performance
significantly increases.  Due to the storage network that this ib is
routing to, we are currently limited to 1500 mtu.

ofed 1.4.1, connected mode, dual opteron dual core 1.8GHz, Mellanox
Technologies MT25418 [ConnectX IB DDR, PCIe 2.0 2.5GT/s] (rev a0) fw
2.6.000, voltaire sm on switch

lro disabled, send_queue_size=256

thanks,
-Ben