Dear OpenMPI developers,
i have a strange problem with mixed program MPI+OPENMP over OpenMPI
1.2.6. I'm using PJL TASK GEOMETRY in LSF Scheduler, setting 2 MPI
process every compute node, and 2 OMP threads per process. Using
paffinity and maffinity, i've noted that over every node, i have 2
thread that works 100%, and 2 threads doesn't works, or works very
If i disable paffinity and maffinity, 4 threads works well, without
I don't understand this issue: paffinity and maffinity should map
every thread over a specific core, optimizing the cache flow, but i
have this without settings there!
Can i use paffinity and maffinity in mixed MPI+OpenMP program? Or it
works only over MPI thread?
Thanks in advance.
Ing. Gabriele Fatigati
CINECA Systems & Tecnologies Department
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it Tel: +39 051 6171722