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Document disabling GPUs #1835

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Jan 15, 2022
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Document disabling GPUs #1835

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document disabling GPUs
DhairyaLGandhi Jan 15, 2022
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Update docs/src/gpu.md
DhairyaLGandhi Jan 15, 2022
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DhairyaLGandhi Jan 15, 2022
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16 changes: 16 additions & 0 deletions docs/src/gpu.md
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Expand Up @@ -85,3 +85,19 @@ julia> x |> cpu
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## Disabling CUDA or choosing which GPUs are visible to Flux

Sometimes it is required to control which GPUs are visible to `julia` on a system with multiple GPUs or disable GPUs entirely. This can be achieved with an environment variable `CUDA_VISIBLE_DEVICES`.

```
$ export CUDA_VISIBLE_DEVICES=''

# or

$ export CUDA_VISIBLE_DEVICES='0,1'
```

The environment variable `CUDA_VISIBLE_DEVICES` can also take a comma separated list of device IDs (`0,1,...`) which would be visible to CUDA related processes.

More information for conditional use of GPUs in CUDA.jl can be found in its [documentation](https://cuda.juliagpu.org/stable/installation/conditional/#Conditional-use), and information about the specific use of the variable is described in the [Nvidia CUDA blogpost](https://developer.nvidia.com/blog/cuda-pro-tip-control-gpu-visibility-cuda_visible_devices/).