[slurm-users] Only one socket for SLURM

[Carlos Fenoy]

Hola Gestió,

You can have a look at: https://slurm.schedmd.com/core_spec.html and the
"CoreSpecCount" or "CpuSpecList" of the slurm.conf file.

Regards,
Carlos

On Fri, Feb 22, 2019 at 6:50 AM Chris Samuel <chris at csamuel.org> wrote:

> On Thursday, 21 February 2019 1:00:52 PM PST Sam Hawarden wrote:
>
> > Linux assigns numbers to your CPUs. 0-15 will be socket 1, thread 1.
> 16-31
> > are socket 2, thread 1, 32-47 are socket 1, thread 2. 48-63 are socket 2,
> > thread 2.
>
> This isn't strictly true, for x86 for instance the kernel will read
> firmware
> tables to discover how the vendor has assigned the core numbering.
>
> This means it can vary from vendor to vendor and model to model plus it
> can
> potentially change on a firmware upgrade, just to make life even more
> exciting.
>
> This is why hwloc (and its predecessors) exist, to give a sane interface
> and
> default logical layout.  Slurm uses a similar system that results in
> something
> that looks very similar, so to Slurm CPU 0 is socket 1, core 1, thread 1
> and
> CPU 2 is socket 1, core 1, thread 2, etc...
>
> All the best,
> Chris
> --
>   Chris Samuel  :  http://www.csamuel.org/  :  Berkeley, CA, USA
>
>
>
>
>

-- 
--
Carles Fenoy
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