[Pw_forum] parallel phonon code ????

[Paolo Giannozzi]

On Jul 9, 2008, at 15:00 , 明文美 wrote:

>  Is the phonon code (ph.x) really implemented in parallel version?

it is. Parallelization on plane waves and on k-points is implemented.
Other kinds of parallelization aren't.

> Furthermore, the speed of computation shows no difference when
> I used 32 CPUs from that when I only 8 CPUs.

the efficiency of parallelization for each phonon calculation is
similar to that for the self-consistent solution. The optimal number
of cpus depend upon a number of factors: cell size and type, kind
of parallelization, speed of communications in your machine.
This is more or less explained in the documentation

Paolo
---
Paolo Giannozzi, Dept of Physics, University of Udine
via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216, fax +39-0432-558222