[slurm-users] --ntasks-per-socket does not work?

Burlen Loring bloring at lbl.gov
Mon Sep 16 16:18:08 UTC 2019

I want to use --ntasks-per-socket  flag to control how processes in a 
multi-threaded application map to numa domains on the Cray system 
cori[1]. In its haswell partition this system has 2 sockets per node.

The flag has no affect and the examples in the slurm docs[2] don't work 
as described there (I am copy and pasting the commands).

Could anyone explain how to make the examples[2] work on cori? Or 
diagnose why they don't?

1 https://www.nersc.gov/users/computational-systems/cori/
2 https://slurm.schedmd.com/mc_support.html#srun_ntasks

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