Hi I am trying to verify/determine what the proper setting is for btl_openib_ib_include.
Some background: * openmpi 2.1.1 (and 1.6.5 - yes it is old) * lxc containers * SRIOV (virtual functions) being used * dedicated IB interface (e.g., ib2) per container Should the mlx4_X:1 correspond to a specific ibY interface? E.g., for ib26, I find mlx4_13:1 by: $ ls /sys/class/net/ib26/device/infiniband mlx4_13 Does the mlx4_X have to be determined at each location where an mpi task would run? I suppose it would because the ibY is likely to be different. On some tests, I have found that the setting: export OMPI_MCA_btl_openib_if_include=mlx4_0:1 provides better performance than not specifying a value or letting mpirun/orted figure it out at runtime. Thanks, John
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