[Pw_forum] k-points parallelization in pwscf 4.2.1

[Paolo Giannozzi]

Davide Sangalli wrote:

> What could my problem be?

the only reason I can think of is that k-point parallelization doesn't
(and cannot) distribute memory, so the total memory requirement will
be npools*(size of serial execution). If you run on the same node six
instances of a large executable, memory conflicts may slow down more
than parallelization can speed up.

P.
-- 
Paolo Giannozzi, Democritos and University of Udine, Italy