<br><font size=2 face="sans-serif">Thanks for sharing these test results.
</font>
<br>
<br><font size=2 face="sans-serif">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.</font>
<br><font size=2 face="sans-serif"><br>
Thanks<br>
Shirley Ma<br>
IBM Linux Technology Center<br>
15300 SW Koll Parkway<br>
Beaverton, OR 97006-6063<br>
Phone(Fax): (503) 578-7638</font>