Le 20/03/2012 21:48, Jeffrey Squyres a écrit : > On Mar 20, 2012, at 3:45 PM, Brice Goglin wrote: > >> That looks good to me, as long as starting port numbers to 1 for >> non-IB/OFED is OK. > > Hmm. Not sure about that. I always thought it was strange that IB devices > started with port 1. > > Are *we* (hwloc) supplying the port number, or are you getting it from /sys > somewhere? > > (/me reads the patch and ibdev2netdev...) > > Ah, I see -- we're effectively doing the same thing as the ibdev2netdev > script: > > ----- > port=$(cat /sys/class/net/$eth/dev_id) > port=$(printf "%d" $port) > port=$(( port + 1 )) > ----- > > Hrm. I don't know if the +1 is a good assumption to make in general.
Yeah the kernel code tells me that this +1 is really IB specific. dev_id was initially added for shared NIC, each client gets a different dev_id (starting at 0). It was later used by IB guys to identify ports 1 and 2 (each port gets a netdevice and they all share the same hardware device, so they used dev_id as well). Brice
