[Pw_forum] using all cores for processing

[Axel Kohlmeyer]

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.
>
>
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-- 
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.