[Beowulf] ib neighbor

[John Hearns]

I did manage to get the graphical netloc utility working once. Part of the
hwloc/openmpi project.

It produces a very pretty image of I topology. I think if you zoom in you
can get neighbours.
A few years since I used it.

On Tue, 19 Sep 2023, 19:03 Michael DiDomenico, <mdidomenico4 at gmail.com>
wrote:

> does anyone know if there's a simple command to pull the neighbor of
> the an ib port?  for instance, this horrible shell command line
>
> # for x in `ibstat | awk -F \' '/^CA/{print $2}'`; do iblinkinfo -C
> ${x} -n 1 -l | grep `hostname -s`; done
> 0x080069000000fbcc "SwitchX -  Mellanox Technologies"  41134   29[  ]
> ==( 4X       14.0625 Gbps Active/  LinkUp)==>  0x88e9a4ffff404704
> 611    1[  ] "logs01 HCA-1" ( )
> 0x88e9a4ffff404704 "                  logs01 HCA-1"    611    1[  ]
> ==( 4X       14.0625 Gbps Active/  LinkUp)==>  0x080069000000fbcc
> 41134   29[  ] "SwitchX -  Mellanox Technologies" ( )
> 0x080069000000fbdc "SwitchX -  Mellanox Technologies"  41219   29[  ]
> ==( 4X       14.0625 Gbps Active/  LinkUp)==>  0x88e9a4ffff404705
> 10105    1[  ] "logs01 HCA-2" ( )
> 0x88e9a4ffff404705 "                  logs01 HCA-2"  10105    1[  ]
> ==( 4X       14.0625 Gbps Active/  LinkUp)==>  0x080069000000fbdc
> 41219   29[  ] "SwitchX -  Mellanox Technologies" ( )
>
> outputs what i need (though i only need the CA perspective), but it's
> going to be an atrocious effort in text parsing.   would be nice if
> there was a nice simple command, preferably that outputs json, but
> that's likely wishful thinking
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