Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] mpirun runs in serial even I set np to several processors
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-04-14 15:02:15


If you didn't use Open MPI, then this is the wrong mailing list for you. :-)

(this is the Open MPI users' support mailing list)

On Apr 14, 2014, at 2:58 PM, Djordje Romanic <djordje8_at_[hidden]> wrote:

> I didn't use OpenMPI.
>
>
> On Mon, Apr 14, 2014 at 2:37 PM, Jeff Squyres (jsquyres) <jsquyres_at_[hidden]> wrote:
> This can also happen when you compile your application with one MPI implementation (e.g., Open MPI), but then mistakenly use the "mpirun" (or "mpiexec") from a different MPI implementation (e.g., MPICH).
>
>
> On Apr 14, 2014, at 2:32 PM, Djordje Romanic <djordje8_at_[hidden]> wrote:
>
> > 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
> >
> > _______________________________________________
> > users mailing list
> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
> >
> > <configure.wrf>_______________________________________________
> > users mailing list
> > users_at_[hidden]
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users

-- 
Jeff Squyres
jsquyres_at_[hidden]
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/