[Beowulf] Fwd: running mpi on different SunFire 12K boards

[guren at be.itu.edu.tr]

we have SunFire 12K system that uses 16 unit UltraSparc III Cu 1200Mhz and
16 unit UltraSparc III Cu 900Mhz cpus. cpus are on the system's different
boards. I want to run a mpi code on the boards which have 1200Mhz cpus or
others. so, I want to use specific boards. is it possible? if it is how
can do it?

If  somebody  help me, I will be very happy.

thanks