[Pw_forum] k-points parallelization in pwscf 4.2.1

Paolo Giannozzi giannozz at democritos.it
Mon Feb 14 11:34:54 CET 2011

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.

Paolo Giannozzi, Democritos and University of Udine, Italy

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