home.md

@@ -1033,6 +1033,8 @@ You can enable X11 forwarding with the "--x11" parameter, for example:
 * srun -n1 --pty --x11 xclock
 
 ### Using GPU's
+The SLURM scheduler will chose a free GPU for you, the Linux cgroups will make sure you will see only the GPU(s) that are chosen for you. This means the the variable CUDA_VISIBLE_DEVICES is not the right variable that denotes your GPU index.  
+The SLURM variable that will return the right GPU index number is SLURM_STEP_GPUS.  
 You can use a GPU with the **--gres** parameter, for example:
 ```
 --partition=gpu