How are you installing the OpenMPI versions? Are you using packages which are distributed by the OS?
It might be worth looking at using Easybuid or Spack https://docs.easybuild.io/en/latest/Introduction.html https://spack.readthedocs.io/en/latest/ On Thu, 4 Mar 2021 at 07:35, Raut, S Biplab via users < users@lists.open-mpi.org> wrote: > [AMD Official Use Only - Internal Distribution Only] > > Dear Experts, > > Until recently, I was using openMPI3.1.1 to run > single node 128 ranks MPI application on Ubuntu18.04 and Ubuntu19.04. > > But, now the OS on these machines are upgraded to Ubuntu20.04, and I have > been observing program hangs with openMPI3.1.1 version. > > So, I tried with openMPI4.0.5 version – The program ran properly without > any issues but there is a performance regression in my application. > > > > Can I know the stable openMPI version recommended for Ubuntu20.04 that has > no known regression compared to v3.1.1. > > > > With Regards, > > S. Biplab Raut >
