[mvapich-discuss] MVAPICH2 with OpenMP

[Sayantan Sur]

Hi Martin,

We will look into the problem. Can you please mention what exactly the
problem is? Also, if you could mention the MVAPICH2 version you are
using, it will be good.

Thanks.

On Tue, Mar 1, 2011 at 5:03 PM, Martin Cuma <martin.cuma at utah.edu> wrote:
> Hi all,
>
> I am having a strange problem with MVAPICH2 - the ones that I build don't
> seem to run multi-threaded programs with OpenMP. I suspect it's some kind of
> a configuration issue on my end as I tried to run MVAPICH2 from the stock
> OFED distribution and the multithreading there is fine.
>
> Also, I have been building OpenMPI with fairly standard options and the
> OpenMP there works fine.
>
> Does someone have similar experience, or, is there some trick with MVAPICH2
> build or running to get multiple OpenMP threads going?
>
> I configure as:
> configure --enable-romio --with-file-system=nfs+ufs  --with-device=ch3:psm
> with Intel or GNU compilers.
>
> Then run as:
> mpiexec.hydra -genv OMP_NUM_THREADS 4 -genv MV2_ENABLE_AFFINITY 0 -n 16
> -machinefile nodefile ./program
>
> This is all on RHEL 5.5 with the Qlogic or Mellanox IB adapters.
>
> Thanks,
> MC
>
> --
> Martin Cuma
> Center for High Performance Computing
> University of Utah
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>
>



-- 
Sayantan Sur

Research Scientist
Department of Computer Science
http://www.cse.ohio-state.edu/~surs