Open MPI logo

Hardware Locality Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Hardware Locality Development mailing list

Subject: Re: [hwloc-devel] PCI device name question
From: Brice Goglin (Brice.Goglin_at_[hidden])
Date: 2012-03-20 12:02:35

Le 20/03/2012 16:52, Jeffrey Squyres a écrit :
> 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.

Actually, what we don't know is how to map that to port 1/2 (we have
ib0/ib1 mac addresses, those are = GUID+1/2 on my machine)