Open MPI logo

Hardware Locality Development Mailing List Archives

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

Subject: Re: [hwloc-devel] PUs not located under cores
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2010-06-24 12:31:12

Samuel Thibault, le Thu 24 Jun 2010 18:28:18 +0200, a écrit :
> > depending on the type of machine you're running on.
> It also depends on the OS and kernel version for instance. Not all
> information is available, the only you can bet on is PUs under a system
> object. At worse there is just one because the OS didn't even say how
> many there are.

Also, it may be worth adding that you can't know whether some layer
might be introduced some day between cores and PUs, so the user
shouldn't assume the former being the direct father of the latter.
There might be groups of PUs for instance, for whatever reason
manufacturers invent in the future and that we will want to express.