Open MPI logo

Hardware Locality Users' Mailing List Archives

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

Subject: Re: [hwloc-users] Using hwloc to map GPU layout on system
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2014-02-06 17:44:42

Brock Palen, le Thu 06 Feb 2014 21:31:42 +0100, a écrit :
> GPU L#3 "nvml2"
> GPU L#5 "nvml3"
> GPU L#7 "nvml0"
> GPU L#9 "nvml1"
> Is the L# always going to be in the oder I would expect? Because then I already have my map then.

No, L# is just following the machine topology. CUDA numbering does not
necessarily follows that (e.g. if a slow GPU is somewhere in the middle).