SLURM job taking up entire node when using just on

Question

I am submitting multiple jobs to a SLURM queue. Each job uses 1 GPU. We have 4 GPUs per node. However once a job is running, it takes up the entire node, leaving 3 GPUs idle. Is there any way to avoid this, so that I can send multiple jobs to one node, using one GPU each?

My script looks like this:

#SLURM --gres=gpu:1
#SLURM --ntasks-per-node 1
#SLURM -p ghp-queue
myprog.exe

Answer 1

I was also unable to run multiple jobs on different GPUs. What helped was adding OverSubscribe=FORCE to the partition configuration in slurm.conf, like this:

PartitionName=compute Nodes=ALL ... OverSubscribe=FORCE

After that, I was able to run four jobs with --gres=gpu:1, and each one took a different GPU (a fifth job is queued, as expected).