Hi All, While evaluating various OpenMPI runtime parameters (OMPI v 5.0), there were some combinations like uct btl with ob1 pml that worked. For example, the following command: mpirun --map-by core --bind-to core -np 2 -mca coll tuned,libnbc,basic --mca pml ob1 -mca opal_common_ucx_tls any --mca osc ^ucx -mca btl vader,uct -mca btl_uct_memory_domains xpmem,tcp ./osu_gather -i 1 -x 0 -m 1024:1024 Here are some doubts I have: Is the usage of uct btl with ob1 pml common? What are the common memory domains that uct is initialized with when used with ob1? Is ucx pml recommended over using uct with ob1 pml?
Thank you,Manu
