[openib-general] ip over ib throughtput

[Shirley Ma]

Thanks for sharing these test results. 

The netperf/netserver IPoIB over UD mode test spent most of time on 
copying data from user to kernel + checksum(csum_partial_copy_generic), 
and it only can send no more than mtu=2044 ib_post_send() per wiki, which 
definitely limits its performance compared to RDMA read/write. I would 
expect NFS/RDMA throughput much better than IPoIB over UD.

Thanks
Shirley Ma
IBM Linux Technology Center
15300 SW Koll Parkway
Beaverton, OR 97006-6063
Phone(Fax): (503) 578-7638
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