Luis, That can happen if a component is linked with libnuma.so: Open MPI will fail to open it and try to fallback on an other one.
You can run ldd on the mca_*.so components in the /.../lib/openmpi directory to figure out which is using libnuma.so and assess if it is needed or not. Cheers, Gilles On Wed, Jul 19, 2023 at 11:36 PM Luis Cebamanos via users < users@lists.open-mpi.org> wrote: > Hello, > > I was wondering if anyone has ever seen the following runtime error: > > mpirun -np 32 ./hello > ..... > [LOG_CAT_SBGP] libnuma.so: cannot open shared object file: No such file > or directory > [LOG_CAT_SBGP] Failed to dlopen libnuma.so. Fallback to GROUP_BY_SOCKET > manual. > ..... > > The funny thing is that the binary is executed despite the errors. > What could be causing it? > > Regards, > Lusi >
