Hi,
Sorry for not answering sooner,
In Open MPI 1.3 we added a paffinity mapping module.
The syntax is quite simple and flexible:
rank N=hostA slot=socket:core_range
rank M=hostB slot=cpu
see the fallowing example:
ex:
#mpirun -rf rankfile_name ./app
#cat rankfile_name
rank 0=host1 slot=0
recommend you upgrade your Open MPI installation. v1.2.8 has
a lot of bugfixes relative to v1.2.2. Also, Open MPI 1.3 should be
available "next month"... so watch for an announcement on that front.
BTW OMPI 1.2.8 also will be available as part of OFED 1.4 that will be
released in end of th
