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Subject: Re: [OMPI users] mpirun runs in serial even I set np to several processors
From: Djordje Romanic (djordje8_at_[hidden])
Date: 2014-04-14 14:32:44


I compiled it with: x86_64 Linux, gfortran compiler with gcc (dmpar).
dmpar - distributed memory option.

Attached is the self-generated configuration file. The architecture
specification settings start at line 107. I didn't use Open MPI (shared
memory option).

On Mon, Apr 14, 2014 at 1:23 PM, Dave Goodell (dgoodell) <dgoodell_at_[hidden]
> wrote:

> On Apr 14, 2014, at 12:15 PM, Djordje Romanic <djordje8_at_[hidden]> wrote:
>
> > When I start wrf with mpirun -np 4 ./wrf.exe, I get this:
> > -------------------------------------------------
> > starting wrf task 0 of 1
> > starting wrf task 0 of 1
> > starting wrf task 0 of 1
> > starting wrf task 0 of 1
> > -------------------------------------------------
> > This indicates that it is not using 4 processors, but 1.
> >
> > Any idea what might be the problem?
>
> It could be that you compiled WRF with a different MPI implementation than
> you are using to run it (e.g., MPICH vs. Open MPI).
>
> -Dave
>
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