[slurm-users] Node specs for Epyc 7xx3 processors?

[Brice Goglin]

Le 22/12/2021 à 17:27, Steffen Grunewald a écrit :
> On Wed, 2021-12-22 at 16:02:00 +0000, Stuart MacLachlan wrote:
>> Hi Steffan,
>>
>> Not sure if the output from 'numactl --hardware' is more consistent and easier to parse with a script or similar?
> Hi,
>
> I'm getting confusing results.
> For an older dual 7351, there are 8 NUMA nodes, 4 physical cores each.
>   (This already works with Slurm "Sockes=8 CorePerSocket=4".)
> For a dual 7713 running Ubuntu, kernel 5.11, I get 2 NUMA nodes, one
> per processor (64 physical cores, times 2).
> I've seen "lscpu" output for a 7313 which also shows 8 nodes, 4 cores,
> 2 threads each, kernel 4.19, Debian Buster.
> Does Ubuntu (or the 5.11 kernel) handle NUMA nodes difefrently?
>

Hello

AMD Epyc can be configured with 1, 2 or 4 NPS (nodes per socket) in the 
BIOS.

Your old 7351 is configured in NPS4, your dual 7713 is NPS1, and 7313 is 
NPS4 again.

Brice



-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature
Type: application/pgp-signature
Size: 840 bytes
Desc: OpenPGP digital signature
URL: <http://lists.schedmd.com/pipermail/slurm-users/attachments/20211222/9b9c08ea/attachment.sig>