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Subject: [OMPI users] openmpiu 1.3.3. with OpenFOAM
From: Bastil2001_at_[hidden]
Date: 2009-08-27 16:13:51

Dear openmpi-ers,

I lately installed openmpi to run OpenFOAM 1.5 on our myrinet cluster. I
saw great performence improvements compared to openmpi 1.2.6, however it
is still little behind the commerical HPMPI.
Are there further tipps for fine-tuning the parameters to run mpirun
with for this special application? From my experience the MX-ML should
be the quicker one so I currently use:

mpirun --mca mtl mx --mca pml cm ...

as given the FAQ.

I also thing that processor affinity might be worth trying, I will do
this. Some other tipps? Are there special reasons why HPMPI still
outperforms openMPI for this kind of tasks? Thanks and regards.