Re: [EXTERNAL] Re: [OMPI users] Horovod Performance with OpenMPI

Hi Shruti, What version of NCCL is installed on the system? Horovod has environment variables you can set to force use of NCCL. You may want to use nvidia-smi to double check whether the benchmark is actually using both GPUs when using two mpi processes. Also, you may want to consult with a t

Re: [EXTERNAL] [OMPI users] Supported MPI standard ?

Hi Mathieu The statement at www.open-mpi.org is incorrect. It should read 3.1 Howard Get Outlook for iOS From: users@lists.open-mpi.org on behalf of Mathieu Westphal Sent: Friday, April 11, 2025 8:34 AM To: Open MPI users Subject: [EXT

Re: [EXTERNAL] [OMPI users] OpenMPI with “Fort integer size: 8” for Dirac*

Hi Reuti, Sorry this missed 5.0.7. https://github.com/open-mpi/ompi/pull/13159 Hopefully it will show up in a 5.0.8 release. Howard On 3/24/25, 8:36 AM, "'Reuti' via Open MPI users" mailto:users@lists.open-mpi.org>> wrote: Hi, Just to let you know, that in Open MPI 5.0.7 it still seems to