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Can't hide GPUs to get_cuda_device_count() #1693

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mattiadg opened this issue May 7, 2024 · 5 comments
Open

Can't hide GPUs to get_cuda_device_count() #1693

mattiadg opened this issue May 7, 2024 · 5 comments

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@mattiadg
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mattiadg commented May 7, 2024

Hi,
thank you for this great project!
I'm running on Windows 11 and ctranslate2 v4.2.1. When running in a machine with gpus, even if I set CUDA_VISIBLE_DEVICES to the empty string, get_cuda_device_count() always returns the number of gpus in the machine.
Is this expected?
@minhthuc2502
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CUDA_VISIBLE_DEVICES should affect which GPU will be visible. If you have more than 2 GPUs, try export CUDA_VISIBLE_DEVICES=1 and run a script to see if GPU 1 is used as expected.

@mattiadg
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mattiadg commented May 13, 2024 via email

@minhthuc2502
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I just tested it, if I set CUDA_VISIBLE_DEVICES="" and get number of gpu device with ctranslate2::get_gpu_count() , I got the correct value.

@mattiadg
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mattiadg commented May 14, 2024 via email

@minhthuc2502
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minhthuc2502 commented May 14, 2024 •
edited

I tested on Linux. Make sure you set correctly the environment variable. You can test directly with CUDA without using ct2 before.

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@mattiadg @minhthuc2502