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. BastiL
