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Posted: **Tue Jul 27, 2021 9:08 am**

I have a node with more than one GPU inside (GPU-0, GPU-1, GPU-2).
I want to tell one or more specific CPU for my calculation.
For instance:
- 1st calculation with 2 ranks on GPU-0 + GPU-3
- 2nd calculation with 1 rank on GPU-1
Are there Keywords to allow me this?

Thanks in advance.

Posted: **Wed Jul 28, 2021 2:50 am**

Hi martin_gumbau,

There are no special VASP tags to do this, but you can use the environment variable CUDA_VISIBLE_DEVICES to specify the devices used for a particular calculation. I hope this serves as a good starting point!

Best regards,
Marie-Therese

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VASP 6.2 - MultiGPU node - set one rank per specific GPU

VASP 6.2 - MultiGPU node - set one rank per specific GPU

Re: VASP 6.2 - MultiGPU node - set one rank per specific GPU