[Beowulf] OpenMP vs. MPI benchmark for multi-core machines?

[Charlie Peck]

On Apr 17, 2008, at 8:38 AM, Eray Ozkural wrote:

> Is there such a benchmark that I can refer to? I am increasingly
> convinced that OpenMP/pthread is required only in extreme cases, but I
> need some numbers to prove that (to myself and my advisor).


Like most other cases YMMV, significantly.  That is there is no way  
to say that one is better than the other except for a very particular  
situation.  This is exacerbated by the fact that different MPI  
implementations handle communication between processes on the same  
CPU differently, and some vary further by the choices made during ./ 
configure.

charlie