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Subject: Re: [OMPI users] mpirun runs in serial even I set np to several processors
From: Dave Goodell (dgoodell) (dgoodell_at_[hidden])
Date: 2014-04-14 13:23:26


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