I think you should use the "--host" or "--hostfile" options:
Hope this helps
On Wed, Feb 26, 2014 at 8:31 AM, raha khalili <khadije.khalili_at_[hidden]>wrote:
> Dear Users
> This is my first post in open-mpi forum and I am beginner in using mpi.
> I want to run a program which does between 4 systems consist of one server
> and three nodes with 20 cpus. When I run: *mpirun -np 20
> /home/khalili/espresso-5.0.2/bin/pw.x -in si.in <http://si.in> | tee si.out*, after writing htop from terminal, it seems the program doesn't use cpus
> of three other nodes and just use the cpus of server. Could you tell me
> please how do I can use all my cpus.
> Khadije Khalili
> Ph.D Student of Solid-State Physics
> Department of Physics
> University of Mazandaran
> Babolsar, Iran
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