On Tue, Jun 23, 2020 at 7:37 AM Bas van der Vlies <bas.vandervl...@surfsara.nl> wrote: > > Which version of slurm do you use? as slurm 19.05: > * DefCpuPerGPU
Sorry for necroposting and undigging this old thread, but the DefCpuPerGpu configuration option is actually just a default, which will happily get overridden by job submission options. It's actually reported as "JobDefaults" in `scontrol show partition`: ``` $ scontrol show partition foo | grep DefCpuPerGPU JobDefaults=DefCpuPerGPU=1 ``` It works as a default: ``` $ salloc -p foo -G 3 $ echo $SLURM_GPUS_ON_NODE 3 $ echo $SLURM_CPUS_ON_NODE 3 ``` but doesn't enforce the ratio: ``` $ salloc -p foo -G 2 -c 4 $ echo $SLURM_GPUS_ON_NODE 2 $ echo $SLURM_CPUS_ON_NODE 4 ``` There is currently (as of 23.02) no mechanism to enforce a fixed GPU per CPU ratio. We've recently submitted a bug to request this feature (as a MaxCpuPerGPU option, for instance), but we unfortunately won't be able to sponsor its development. If anyone's interested, it's up for grabs at https://bugs.schedmd.com/show_bug.cgi?id=16189 Cheers, -- Kilian
