On May 8, 2009, at 10:32 AM, Ralph Castain wrote:
Actually, I was wondering (hot tub thought for the night) if the
paffinity system can't just tell us if the proc has been bound or not?
That would remove the need for YAP (i.e., yet another param).
Yes, it can.
What it can't tell, though, is who set it. So a user may have
overridden the paffinity after main() starts but before MPI_INIT is
invoked.
But perhaps that's not a crime -- users can override the paffinity at
their own risk (we actually have no way to preventing them from doing
so). So perhaps just checking if affinity is already set is a "good
enough" mechanism for the MPI_INIT-set-paffinity logic to determine
whether it should set affinity itself or not.
--
Jeff Squyres
Cisco Systems
