[Beowulf] multi-threading vs. MPI

[Håkon Bugge]

At Sun, 9 Dec 2007 13:19:23, "Douglas Eadline" <deadline at eadline.org> wrote:


>Test      OpenMP              MPI
>        gcc/gfortran 4.2    LAM 7.1.2
>------------------------------------
>FT        3535.9            2090.8

I have some suspicion that if you run this with one MPI-rank/thread, 
you will find the OMP version to be significant faster. Not that this 
undermines you finding, but I though it complements the picture.


Hakon