Intel-MPI 2021.8 / Mellanox IB: tuning file not found - Which impact on computations?

[Olivier-Fr]

Hello all,

We are preparing a switch from Intel-MPI 2018 to version 2021.* (currently tested: 2021.8), for use in conjunction with Mellanox Infiniband interconnect.

Although our testcases are running well, mpirun would display the following message at startup:

[0#36769:36769@plgrocalv905] MPI startup(): File "/test/mpi/intel-2021.8.0/mpi/2021.8.0/etc/tuning_skx_shm-ofi_mlx_56.dat" not found
[0#36769:36769@plgrocalv905] MPI startup(): Load tuning file: "/test/mpi/intel-2021.8.0/mpi/2021.8.0/etc/tuning_skx_shm-ofi.dat"

I assume this is linked to Infinibandsupport - Do you have any idea which incidence this warning might have on the computations?

As it does not look to be part of standard Intel-MPI packaging, does  Intel otherwise maintain any "tuning_skx_shm-ofi_mlx*.dat" file or should this be checked with IB vendor?

Thanks!

[SantoshY_Intel]

Hi,

Thanks for posting in the Intel communities.

We are able to reproduce your issue from our end. We are working on your issue and we will get back to you soon.

Thanks & Regards,

Santosh