-------------------------------------------------------------------------- By default, for Open MPI 4.0 and later, infiniband ports on a device are not used by default. The intent is to use UCX for these devices. You can override this policy by setting the btl_openib_allow_ib MCA parameter to true. Local host: acn133 Local adapter: mlx5_0 Local port: 1 -------------------------------------------------------------------------- -------------------------------------------------------------------------- WARNING: There was an error initializing an OpenFabrics device. Local host: acn133 Local device: mlx5_0 -------------------------------------------------------------------------- [acn133:491966] [[2918,0],0] ORTE_ERROR_LOG: Data unpack would read past end of buffer in file util/show_help.c at line 501 [acn133:491966] [[2918,0],0] ORTE_ERROR_LOG: Data unpack would read past end of buffer in file util/show_help.c at line 507 {"realtime":12.86,"usertime":10.27,"systime":1.19,"memmax":364928,"memavg":0}