Limitations of CUDA-Aware MPI in EESSI Host Injections

[TopRichard]

When using EESSI site-specific host injections, a key limitation of MPI injection is that the injected libmpi.so.40 from CUDA-aware OpenMPI is typically built against a specific CUDA toolkit version. This could result in a mismatch with CUDA-enabled software provided by EESSI, which may have been built against different CUDA toolkit versions. Such inconsistencies can lead to runtime errors.

[ocaisa]

There is probably a way to mitigate this using eb_hooks.py by adding a toolchain-specific option for the RPATH injection.