Errors when running mpi programs

[rafelamer]

Errors when running mpi programs

[wenduwan]

Is mpi02 on a shared NFS volume? It would be helpful to double check the linking

ldd mpi02

I don't know if it is relevant, in Fedora 40 the openmpi library is linked to libfabric

We can rule out libfabric with additional mca parameters

mpirun -np 16 --mca pml ob1 --mca btl tcp,self --hostfile ~/hosts ./mpi02

This prevents libfabric from being used.

[rafelamer]

Hi,

with this command
mpirun -np 16 --mca pml ob1 --mca btl tcp,self --hostfile ~/hosts ./mpi02
it works fine. So, it seems that the problem is related to libfabric.

Thanks,
Rafel Amer

[wenduwan]

Thanks for checking. Just to clarify, do you intend to use libfabric at all?

I wonder how libfabric is configured on your system - we can move the discussion to the libfabric community if you desire so.

$ dnf list installed | grep libfabric
$ dnf info <libfabric package name>

[rafelamer]

OK,
I will subscribe to the Libfabric-users mailing list and then, I will make a post.

Best regards,
Rafel Amer

[wenduwan]

The libfabric community would need more information to investigate the issue.

As a starter, you can turn on the relevant verbose configurations in mpirun

--mca btl_ofi_verbose 1 -x FI_LOG_LEVEL=info