Basic Usage: GPU Based Resources With Slurm
Contents
Introduction
Simple commands with SLURM
You can obtain information on the Slurm "Partitions" that accept jobs using the sinfo command
$ sinfo PARTITION AVAIL TIMELIMIT NODES STATE NODELIST test up 1:00 1 idle gnt-usiu-gpu-00.kenet.or.ke gpu1 up 1-00:00:00 1 idle gnt-usiu-gpu-00.kenet.or.ke normal* up 1-00:00:00 1 idle gnt-usiu-gpu-00.kenet.or.ke
The test partition is reserved for testing, with a very short time limit. The normal partition is to be used for CPU only jobs,
and the gpu1 queue is reserved for GPU jobs. Both production partitions have a time limit of 24 hours at a time for individual
jobs.
Showing The Queue
The squeue slurm command will list all submitted jobs, and will give you an indication of how busy the cluster is, as well as the status of all running or waiting jobs. Jobs that are complete will exit the queue and will not be in this list.
$ squeue JOBID PARTITION NAME USER ST TIME NODES NODELIST(REASON) 63 normal gpu1 jotuya R 0:03 1 gnt-usiu-gpu-00.kenet.or.ke $
Submitting Your first GPU Job
Create a submission script for Quantum Espresso
You require a submission script, which is a plain text file with all the instructions for the command you intend to run.
Retreive the example files in your scratch directory from this [ https://github.com/Materials-Modelling-Group/training-examples | github repository ]
cd ~/localscratch/ git clone https://github.com/Materials-Modelling-Group/training-examples.git cd training-examples
and in this directory we will place the following text content in a file:
#!/bin/bash #SBATCH -J gputest # Job name #SBATCH -o job.%j.out # Name of stdout output file (%j expands to jobId) #SBATCH -e %j.err # Name of std err #SBATCH --partition=gpu1 # Queue #SBATCH --nodes=1 # Total number of nodes requested #SBATCH --gres=gpu:1 # Total number of gpus requested #SBATCH --cpus-per-task=1 # #SBATCH --time=00:03:00 # Run time (hh:mm:ss) - 1.5 hours # Launch MPI-based executable module load applications/gpu/qespresso/7.3.1 cd $HOME/localscratch/training-examples mpirun -np 1 pw.x <al.scf.david.in > output.out
Put this in a file called test.slurm
Submitting the Job to the Queue
The slurm sbatch command provides the means to submit batch jobs to the queue:
$ sbatch test.slurm Submitted batch job 64 $
This will run the named program on a single GPU, note that the GPU acceleration is built into the program, if the program itself does not support GPU acceleration, attempting to run on the GPU will fail.
Watch Demo
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