Dear Martin,
Thank you for your advice. I had not remembered to check the cgroup
configuration and plugin status. I am quite sure that this will solve
the issue.
Best regards, Kai Ruusuvuori
Kai,
The Linux scheduler is not constrained by Slurm core allocations. So
normally it can schedule Slurm tasks, and their child processes, on
any core on the node. To constrain a Slurm job to its allocated
cores, configure the task/cgroup plugin in slurm.conf with
ConstrainCores=yes in cgroup.conf. See the slurm.conf and
cgroup.conf man pages for more information.
Also, as you note, Slurm uses its own CPU numbering system, so the
CPU_IDs reported by Slurm will not necessarily match the CPU numbers
reported by Linux commands like top.
Regards,
Martin Perry
Bull Phoenix
--
Kai Ruusuvuori, PhD Student
Faculty of Science
Department of Physics
Division of Atmospheric Sciences
P.O. Box 64
Gustaf Hällströmin katu 2
00014 University of Helsinki
Finland
