[mvapich-discuss] Errors in BSBR when running xCbtest and xFbest of the BLACS

[Krishna Kandalla]

Hello Claudio,

    I just tried running the xdqr test with 16 processes (one node) on the
TACC Stampede cluster. The overall execution time for this test, with or
without this flag does not seem to vary much. I am seeing about 1.02 -
1.06s as the total time. This test also completes correctly without the env
variable that we had discussed. And, if it helps, I am also seeing that
this test takes about 1.7s with Open-MPI-1.6.4.

    If you are using any specific configure/run-time options for the
MVAPICH2-1.9 library, could you please share the details?


Thanks,
Krishna

On Wed, May 15, 2013 at 10:31 AM, Claudio J. Margulis <
claudio-margulis at uiowa.edu> wrote:

> It seems that my mail did't go through so I am resending it.
> Please read below.
> Claudio
>
>
> Claudio J. Margulis wrote:
>
>> Dear Krishna, thanks for responding.
>> Yes, with that environmental variable the errors are gone. However run
>> time for the tests become extremely long.
>> As an example a typical scalapack test
>> mpirun -np 16 ./xdqr <QR.dat that takes a second to run with openmpi
>> takes on the order of minutes with mvapich2.
>>
>> Claudio
>>
>>
> --
> signature.html Claudio J. Margulis
>
> Associate Professor of Chemistry
> The University of Iowa
> Margulis Group Page <http://www.chem.uiowa.edu/**
> faculty/margulis/group/first.**html<http://www.chem.uiowa.edu/faculty/margulis/group/first.html>
> >
>
>
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