[Pw_forum] MPI

[Lorenzo Paulatto]

On 10/09/2013 07:16 PM, Mike Klymenko wrote:
> mpirun -np 4096 ./neb.x -nimage 8 -npool 2 -ntg 4 -ndiag 144 -input my.input
> 
> Do I really need  to specify all of then for scf? My computer has 32 CPUs.
> I know that practice makes perfect, but could I get some knowledge a priory
> here?


Dear Mike,
if you oonly have 32 cpus it is a bad idea to run 4096 parallel processes.

best regards



-- 
Dr. Lorenzo Paulatto
IdR @ IMPMC -- CNRS & Université Paris 6
phone:+33 (0)1 44275 084 / skype: paulatz
www:  http://www-int.impmc.upmc.fr/~paulatto/
mail: 23-24/4é16 Boîte courrier 115, 4 place Jussieu 75252 Paris Cédex 5