[slurm-users] Assigning two "cores" when I'm only request one.

Luis R. Torres lrtorres at gmail.com
Mon Jul 12 19:16:17 UTC 2021

Hi Folks,

I'm trying to run one task on one "core", however, when I test the
affinity, the system gives me "two"; I'm assuming the two are threads since
the system is a dual socket system.  Is there anything in the configuration
that I can change to have a single core or thread assigned to a
single-processing job by default?

srun --ntasks=1 --cpus-per-task=1 show-affinity.py

pid 7899's current affinity mask: 401


CPUs in system:  20

PID:  7899

Allocated CPUs/Cores:  2

Affinity List:  {0, 10}


Luis R. Torres
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