[slurm-users] DefCpuPerGPU and multiple partitions

[Ansgar Esztermann-Kirchner via slurm-users]

Hello List,

does anyone have experience with DefCpuPerGPU and jobs requesting
multiple partitions? I would expect Slurm to select a partition from
those requested by the job, then assign CPUs based on that
partition's DefCpuPerGPU. But according to my observations, it appears
that (at least sometimes), DefCpuPerGPU from another partition
(also requested by the job, but not selected to execute it) is
used to assign CPUs.
I haven't done extensive testing to determine whether there's a
pattern to this (e.g. always the first partition is used to calculate
the number of CPUs), but I've found a bug report that seems to
describe what I'm seeing:
https://bugs.schedmd.com/show_bug.cgi?id=15238

Unfortunately, it appears to have been closed as invalid really
quickly.

I'm on 23.02.5.

Best,

A.
--
Ansgar Esztermann
Sysadmin Dep. Theoretical and Computational Biophysics
https://www.mpinat.mpg.de/person/11315/3883774