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select_device() cleanup #6302

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Merged
merged 6 commits into from
Jan 15, 2022
Merged

select_device() cleanup #6302

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63a5d2a
`select_device()` cleanup
glenn-jocher Jan 15, 2022
23dfe40
Update torch_utils.py
glenn-jocher Jan 15, 2022
f65fdd2
Update torch_utils.py
glenn-jocher Jan 15, 2022
242d3aa
Update torch_utils.py
glenn-jocher Jan 15, 2022
cf42a7b
Update torch_utils.py
glenn-jocher Jan 15, 2022
65fa7c8
Update torch_utils.py
glenn-jocher Jan 15, 2022
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6 changes: 3 additions & 3 deletions utils/torch_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -61,9 +61,9 @@ def select_device(device='', batch_size=0, newline=True):
if cpu:
os.environ['CUDA_VISIBLE_DEVICES'] = '-1' # force torch.cuda.is_available() = False
elif device: # non-cpu device requested
assert torch.cuda.is_available(), 'CUDA unavailable' # check CUDA is available
device_list = [int(val) for val in device.replace(',', '')]
assert all([torch.cuda.device_count() > element for element in device_list]), f'invalid CUDA device {device} requested' # check index
nd = torch.cuda.device_count() # number of CUDA devices
assert torch.cuda.is_available(), 'CUDA is not available, use `--device cpu` or do not pass a --device'
assert nd > int(max(device.split(','))), f'Invalid `--device {device}` request, valid devices are 0 - {nd - 1}'
os.environ['CUDA_VISIBLE_DEVICES'] = device # set environment variable (must be after asserts)

cuda = not cpu and torch.cuda.is_available()
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