On Mar 20, 2012, at 11:09 AM, Brice Goglin wrote: >> I looked at that. It's not immediately clear to me how to map that to "ib0" >> and "ib1", for example. > > Also I see that /sys/class/infiniband/mlx4_0/node_guid contains > 0002:c903:000b:5348, that's ib0's end-of-address minus one, and ib1's > end-of-address minus two.
Yep -- that's a carryover from IB. I don't remember offhand whether that GUID pattern is guaranteed by the device/port abstraction, or whether Mellanox equipment just happens to always do that. But I still don't know how to map that to ib0/ib1. > But I have no idea what GID, LID and GUID really are so I don't know if > there's anything to do with this. We should ask some IB kernel/hardware > guys in case there is some guarantee about mac address and/or GID/LID > ordering. I'll ask my Mellanox OMPI brethren if there's some kind of deliberate mapping. -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
