Hi, Nathan:
Thanks for you reply.
1) It was my mistake not to notice usage of osu_latency. Now it worked
well, but still poorer in openib.
2) I did not use sm or vader because I wanted to check performance between
tcp and openib. Besides, I will run the application in cluster, so vader is
not so important.
3) Of course, I tried you suggestions. I used ^tcp/^openib and set
btl_openib_if_include to mlx5_0 in a two-node cluster (IB
direcet-connected). The result did not change -- IB still better in MPI
benchmark but poorer in my applicaion.
Best Regards,
Xie Bin
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