How to disable GPU for Python program?

Question

I want to disable GPU from Python program.

I tried but the program is still using GPU. I am using Dlib face recognition.

os.environ["CUDA_DEVICE_ORDER"] = "PCI_BUS_ID"   # see issue #152
os.environ["CUDA_VISIBLE_DEVICES"] = ""

Answer 1

Try this instead:

os.environ['CUDA_VISIBLE_DEVICES'] = '-1'

The docs recommend using an invalid index (-1) instead of trying to pass a blank value; setting this value to something blank is something that various people have come up with on their own but doesn't always seem to work. Source: https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars