Re: [OMPI users] Help : Slowness with OpenMPI (1.8.1) and Numpy

2015-06-12 Thread Ralph Castain 
Is this a threaded code? If so, you should add —bind-to none to your 1.8 series 
command line


> On Jun 12, 2015, at 7:58 AM, kishor sharma  wrote:
> 
> Hi There,
> 
> 
> 
> I am facing slowness running numpy code using mpirun with openmpi 1.8.1 
> version.
> 
> 
> 
> With Open MPI (1.8.1)
> 
> -
> 
> > /usr/lib64/openmpi/bin/mpirun -version
> 
> mpirun (Open MPI) 1.8.1
> 
>  
> Report bugs to http://www.open-mpi.org/community/help/ 
> 
> >  time /usr/lib64/openmpi/bin/mpirun -np 1 python -c 'import numpy; 
> > numpy.linalg.svd(numpy.eye(1000))'
> 
> real 23.75
> 
> user 6.95
> 
> sys 16.68
> 
> > 
> 
> 
> 
> 
> 
> With Open MPI (1.5.4):
> 
> -
> 
> > /usr/lib64/openmpi/bin/mpirun -version
> 
> mpirun (Open MPI) 1.5.4
> 
>  
> Report bugs to http://www.open-mpi.org/community/help/ 
> 
> > time /usr/lib64/openmpi/bin/mpirun -np 1 python -c 'import numpy; 
> > numpy.linalg.svd(numpy.eye(1000))'
> 
> real 1.35
> 
> user 2.11
> 
> sys 0.71
> 
> >
> 
> 
> 
> Do you guys have any idea why the above function is 10-15x with openmpi 
> version 1.8.1
> 
> 
> 
> Thanks,
> 
> Kishor
> 
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> Link to this post: 
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[OMPI users] Help : Slowness with OpenMPI (1.8.1) and Numpy

2015-06-12 Thread kishor sharma 
Hi There,


I am facing slowness running numpy code using mpirun with openmpi 1.8.1
version.


With Open MPI (1.8.1)

-

> /usr/lib64/openmpi/bin/mpirun -version

mpirun (Open MPI) 1.8.1



Report bugs to http://www.open-mpi.org/community/help/

>  time /usr/lib64/openmpi/bin/mpirun -np 1 python -c 'import numpy;
numpy.linalg.svd(numpy.eye(1000))'

real 23.75

user 6.95

sys 16.68

>



With Open MPI (1.5.4):

-

> /usr/lib64/openmpi/bin/mpirun -version

mpirun (Open MPI) 1.5.4



Report bugs to http://www.open-mpi.org/community/help/

> time /usr/lib64/openmpi/bin/mpirun -np 1 python -c 'import numpy;
numpy.linalg.svd(numpy.eye(1000))'

real 1.35

user 2.11

sys 0.71

>


Do you guys have any idea why the above function is 10-15x with openmpi
version 1.8.1


Thanks,

Kishor