Diego,
this is probably due to a change in the PMI interface. i suggest you rebuilt your MPI library first, and then try again Cheers, Gilles On 7/19/2017 4:20 PM, Diego Zuccato wrote:
Hello all. I've just upgraded from Debian 8 to Debian 9, and that upgraded slurm from 14.03 to 16.05. But now some MPI jobs are no more really parallel if run via srun, but work OK if run via mpirun. The problem seems that srun launches N threads with mpi_world_size=1 (so every process thinks it's the only one and all threads work on the same dataset), while mpirun launches one thread with mpi_world_size=N . Did I miss something? Tks.
