[Pw_forum] general question on openMP

[Paolo Giannozzi]

On Wed, 2011-10-12 at 12:43 +0200, pascal boulet wrote:

> I am not familiar with the openMP parallelization. I would 
> like to know in what circumstances openMP is worth being used? 
> Same question for MPI+openMP.

Right now, OpenMP alone is seldom faster than MPI, but MPI+OpenMP
is very useful for large calculations on machines like IBM BlueGene

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