[Beowulf] multi-threading vs. MPI

Håkon Bugge Hakon.Bugge at scali.com
Mon Dec 10 08:34:04 EST 2007


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



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