[Pw_forum] using all cores for processing

[siddheshwar chopra]

Thank you Sir for the guidance. Yes, there was a problem with MPI
configuration. I reinstalled MPICH2 through administrator account and added
username, password. Now it is working well and using all cores.
I definitely agree with you regarding congestion due to hyperthreading.
Could you tell, for which kinds of calculations, will the HT be useful
then?
I will ensure not to overuse it then.

Regards,
On 15-Jan-2016 8:41 pm, "Axel Kohlmeyer" <akohlmey at gmail.com> wrote:

> On Fri, Jan 15, 2016 at 4:33 AM, siddheshwar chopra <sidhusai at gmail.com>
> wrote:
> > For more information, I installed 5.2.1 setup for windows. And got the
> > following error:
> >
> > Error while connecting to host, No connection could be made because the
> > target machine actively refused it. (10061)
> > Connect on sock (host=Matrix, port=8678) failed, exhaused all end points
> > Unable to connect to 'Matrix:8678',
> > sock error: Error = -1
>
> this is a problem of your MPI configuration, or rather your firewall
> blocking MPI message passing to remote machines. this needs to be
> properly configured and you need to follow the MPI installation and
> configuration instructions specific to the MPI package that you
> installed.
> have you followed the instructions given here?
> http://rpm.lammps.org/qe4win.html
>
> since you are running on your local machine only, try: mpiexec
> -localonly 2 pw.x -in si.inp > si.out
>
> also, it is *very* unlikely that you'll get any speedup from
> hyperthreading, more likely the added processes will cause congestion
> on the memory bus and slow you down.
>
> axel.
>
> >
> >
> > I was running QE using the following command:
> >
> > mpiexec -np 4 pw.x <PATH/si.inp> <si.out>
> >
> > Please help.
> >
> > Regards,
> >
> > On Fri, Jan 15, 2016 at 1:23 PM, siddheshwar chopra <sidhusai at gmail.com>
> > wrote:
> >>
> >> Dear Users,
> >> I want to use the Windows version of Quantum Espresso. I have a 2 core
> (4
> >> threads) system. How can I run program using all 4 threads? It doesn't
> work
> >> with qcenv_p.bat. What are the priminary packages needed for parallel
> >> execution?
> >>
> >> Regards,
> >>
> >> --
> >> Dr. Siddheshwar chopra,
> >> M.Sc., Ph.D (Physics)
> >> Assistant Professor (Physics),
> >> Amity University, Noida, India.
> >>
> >
> >
> >
> > --
> > Dr. Siddheshwar chopra,
> > M.Sc., Ph.D (Physics)
> > Assistant Professor (Physics),
> > Amity University, Noida, India.
> >
> >
> > _______________________________________________
> > Pw_forum mailing list
> > Pw_forum at pwscf.org
> > http://pwscf.org/mailman/listinfo/pw_forum
>
>
>
> --
> Dr. Axel Kohlmeyer  akohlmey at gmail.com  http://goo.gl/1wk0
> College of Science & Technology, Temple University, Philadelphia PA, USA
> International Centre for Theoretical Physics, Trieste. Italy.
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