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Subject: Re: [hwloc-devel] v1.7
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2013-03-31 16:09:23


Hello,

I'm realizing that this was actually not settled on. I've just fixed my
previous text with the current syntax

Samuel Thibault, le Mon 07 Jan 2013 15:05:55 +0100, a écrit :
> Brice Goglin, le Mon 31 Dec 2012 10:05:41 +0100, a écrit :
> > + The HWLOC_COMPONENTS may now start with '-' to only define a list of
> > components to exclude.
>
> I'm finding it not intuitive and not generic enough [...]
>
> It means that
>
> HWLOC_COMPONENTS=-cuda,opencl
>
> disables cuda *and* opencl, while intuition would have told me that it
> disables cuda but enables opencl.
>
> Also, one would for instance want to be able to do this:
>
> HWLOC_COMPONENTS=x86,-cuda,-opencl,nvml
>
> To be able to enable x86 before the default linux, but disable cuda and
> opencl, but enable nvml, as well as all the other usual plugins (without
> having to know the list, which is important for future extensions).

I thought we agreed that it would be useful to be able to do it, and
using '-' instead of '^' was meant to avoid confusion with Open-MPI
which has the previous behavior.

Samuel