[ofa-general] Bandwidth of performance with multirail IB

[Jie Cai]

I have implemented a uDAPL program to measure the bandwidth on IB with 
multirail connections.

The HCA used in the cluster is Mellanox ConnectX HCA. Each HCA has two 
ports.

The program utilize the two port on each node of cluster to build 
multirail IB connections.

The peak bandwidth I can get is ~ 1.3 GB/s (not bi-directional), which 
is almost the same as single rail connections.

Does anyone have similar experience?