[Pw_forum] ZGEMM or MATMUL for MPI environment

[Ilya Ryabinkin]

> If the matrix S is not distributed (and if you have a copy of it on each
> processor), MATMUL (evc, S) will be distributed exactly in the same way as
> evc

How do I know if it is distributed? I got it through

 CALL calbec( npw, evcold, evc, S )

--
I.

>
> Paol
>
> On Wed, Aug 31, 2016 at 9:16 PM, Ilya Ryabinkin <igryabinkin at gmail.com>
> wrote:
>>
>> Colleagues:
>> I'm wondering what should I use to get the matrix product evc*S, where
>>    evc  = evc(npw, nbnd)
>> is a collection of MOs and
>>    S = S(nbnd, nbnd)
>> if my code is executed on several MPI nodes?
>>
>> I see that for for nproc >1
>>
>> npw is actually npw/nproc, which brings a question what is happening
>> in the MATMUL(evc, S)
>>
>>
>> Ilya
>>
>> --
>> *******************************************************
>>                     Ilya Ryabinkin
>>                  Postdoctoral Scholar
>>           Physical and Environmental Sciences
>>            University of Toronto Scarborough
>>   http://www.utsc.utoronto.ca/~aizmaylov/Members.html
>> *******************************************************
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>
>
>
>
> --
> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
> Phone +39-0432-558216, fax +39-0432-558222
>
>
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-- 
*******************************************************
                    Ilya Ryabinkin
                 Postdoctoral Scholar
          Physical and Environmental Sciences
           University of Toronto Scarborough
  http://www.utsc.utoronto.ca/~aizmaylov/Members.html
*******************************************************