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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