I was experimenting with mpitune. When it finishes, I found that quite a few new files are created in directory /opt/intel/impi/4.1.0/intel64/etc
Among these files are:
* mpiexec_rdssm_nn_8_np_128_ppn_16.conf
* mpiexec_shm-dapl_nn_8_np_128_ppn_16.conf
* mpiexec_shm:dapl_nn_8_np_128_ppn_16.conf
When I inspect content of these files:
* shm-dapl contains I_MPI_ADJUST_ALLGATHERV and I_MPI_ADJUST_ALLREDUCE
* shm:dapl contains I_MPI_ADJUST_BCAST I_MPI_ADJUST_GATHER I_MPI_ADJUST_ALLGATHER I_MPI_ADJUST_SCATTER I_MPI_ADJUST_REDUCE
* rdssm contains all the 7 above, and each line of it is the same to either a line in shm-dapl or a line in shm:dapl
AFAIK, rdssm is equivalent to shm:dapl. I'm even more confused when I see both shm-dapl and shm:dapl.
Can any one explain why there are these 3 files? And what the difference is between them?