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CUDA tutorial: Difference between revisions
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→Quick start guide
| Line 8: | Line 8: | ||
$ module load cuda | $ module load cuda | ||
</source> | </source> | ||
As a first step we will add two numbers together. Save the below file as <code>add.cu</code>. '''The <code>cu</code> file extension is important!'''. | As a first step we will add two numbers together on a GPU. Save the below file as <code>add.cu</code>. '''The <code>cu</code> file extension is important!'''. | ||
{{File | {{File | ||
|name=add.cu | |name=add.cu | ||
| Line 44: | Line 44: | ||
} | } | ||
}} | }} | ||
To build the program use the command below. | To build the program use the command below which will create an executable named <code>add</code>. | ||
<source lang="console"> | <source lang="console"> | ||
$ nvcc add.cu -o add | $ nvcc add.cu -o add | ||
</source> | </source> | ||
To run the program first create a | To run the program first create a Slurm job script called gpu_job.sh. | ||
{{File | {{File | ||
|name=gpu_job.sh | |name=gpu_job.sh | ||
| Line 59: | Line 59: | ||
#SBATCH --time=0-00:10 # time (DD-HH:MM) | #SBATCH --time=0-00:10 # time (DD-HH:MM) | ||
./add #name of your program | ./add #name of your program | ||
}} | }}For information about GPU job scripts see [[Using GPUs with Slurm|using GPUs with Slurm]]. | ||
Submit your GPU job to the scheduler with this command. | |||
<source lang="console"> | <source lang="console"> | ||
$ sbatch gpu_job.sh | $ sbatch gpu_job.sh | ||
</source> | Submitted batch job 3127733 | ||
Once your job has finished you should see an output file | </source>For information about the <code>sbatch</code> command and running and monitoring jobs see [[Running jobs|running jobs]]. | ||
Once your job has finished you should see an output file similar to this. | |||
<source lang="console"> | <source lang="console"> | ||
$ cat slurm-3127733.out | $ cat slurm-3127733.out | ||
2+7=9 | 2+7=9 | ||
</source> | </source> | ||
If you run this | If you run this without a GPU present you might see output like <code>2+7=0</code>. | ||
=Introduction= <!--T:1--> | =Introduction= <!--T:1--> | ||