[QE-users] The pencil decomposition option

Lorenzo Bastonero lbastone at uni-bremen.de
Wed Nov 9 15:13:26 CET 2022


Dear Elie,

You were almost there! Try adding literally what is suggested, i.e. “-pd .true.”

Best,
Lorenzo Bastonero 

Inviato da iPhone

> Il giorno 9 nov 2022, alle ore 15:08, Elio Physics <Elio-Physics at live.com> ha scritto:
> 
> 
> Dear all,
> 
> I have been running some calculations on a supercomputer with some constraints on the number of processors I can run QE. I am faced with the error:
> 
> %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
>      Error in routine  fft_type_set (6):
>   there are processes with no planes. Use pencil decomposition (-pd .true.)
>  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
> 
> How do I tell the code to use the pencil decomposition? I have tried adding -pd to the 'mpirun' an adding use_pd=.true. in the PW inout but in vain.
> 
> Thanks in advance
> 
> Elie Moujaes
> Adjunct professor
> Federal University of Rondonia
> Brazil.
> 
> 
> 
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