MVAPICH is a high-performance implementation of the MPI (Message Passing Interface) standard with support for both Unified Communication X (UCX) and Open Fabric Interfaces (OFI).

The MVAPICH-SHS variant comes with the CXI provider support for Slingshot Host Systems and the _cuda version was build with CUDA 12 support (use MPIR_CVAR_ENABLE_GPU=0 to disable it).

In case the actual netmod is not correctly recognized at run time, activate it using either MPICH_CH4_NETMOD=ucx or MPICH_CH4_NETMOD=ofi.