[QE-users] QE6.8: "Slab decomposition and task groups not implemented"

[Sebastian Hütter]

Am 22.08.2021 um 11:24 schrieb Paolo Giannozzi:
> when the number of MPI processes for FFT parallelization exceeds the third FFT dimension (nr3s), the  efficiency of the 
> slab parallelization flattens out (for an obvious reason: there aren't enough slabs)

That makes a lot of sense and fits my test observations.

Thank you very much for the explanation!


Best,

Sebastian


> 
> Paolo
> 
> 
>      > The choice will be made automatic sooner or later.
> 
>     Automatically optimized defaults are always nice :)
> 
> 
>     Best,
> 
>     Sebastian
> 
>      >
>      > Paolo
>      >
>      >
>      >
>      >     Thanks for any help,
>      >
>      >     Sebastian
>      >
>      >     --
>      >     M.Sc. Sebastian Hütter
>      >     Otto-von-Guericke University Magdeburg
>      >     Institute of Materials and Joining Technology
>      >     Universitätsplatz 2
>      >     D-39106 Magdeburg
>      >     Tel.: +49 (0)391-67-54566
>      >     Fax: +49 (0)391-67-44569
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>      > --
>      > Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
>      > Univ. Udine, via delle Scienze 206, 33100 Udine, Italy
>      > Phone +39-0432-558216, fax +39-0432-558222
>      >
>      >
>      >
>      > _______________________________________________
>      > Quantum ESPRESSO is supported by MaX (www.max-centre.eu <http://www.max-centre.eu>)
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> -- 
> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
> Univ. Udine, via delle Scienze 206, 33100 Udine, Italy
> Phone +39-0432-558216, fax +39-0432-558222
> 
> 
> 
> _______________________________________________
> Quantum ESPRESSO is supported by MaX (www.max-centre.eu)
> users mailing list users at lists.quantum-espresso.org
> https://lists.quantum-espresso.org/mailman/listinfo/users
>