On Mar 9, 2007, at 10:44 AM, Jeff Squyres wrote:
1. For openmpi we have used the "--mca btl openib,self
..." as command line option and it is
running fine, now the question is how to make sure
the it uses IB for mpi communication??
This parameter tells Open MPI to only use the "openib" and "self"
plugins for MPI communications.
I neglected to mention that by default, Open MPI should use as many
networks as it can. So if it finds an OFED-based network adapter,
it'll use it (and implicitly disable tcp). Hence, you shouldn't need
to specify the "--mca btl [sm,]openib,self" parameter. There is no
harm in doing so, of course -- it's just unnecessary.
More specifically, if you have the "openib" BTL plugin properly
installed (e.g., via the OFED installer), it will complain if it is
available and *not* used (e.g., no OFED-based network adapters were
found / available to be used).
Hope that helps.
--
Jeff Squyres
Cisco Systems
_______________________________________________
general mailing list
[email protected]
http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general
To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
