mirror of
https://github.com/zebrajr/pytorch.git
synced 2025-12-07 12:21:27 +01:00
fbdafb006e
Summary: Trivial typo fixings. Maybe the indefinite article "an" is needed before each "specified index" but I'm not perfectly sure. Pull Request resolved: https://github.com/pytorch/pytorch/pull/16026 Differential Revision: D13709499 Pulled By: ezyang fbshipit-source-id: 698b000bb8aa063afd81db6e67046456a439b2ce
36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
import torch
|
|
import torch._six
|
|
|
|
|
|
def _get_device_index(device, optional=False):
|
|
r"""Gets the device index from :attr:`device`, which can be a torch.device
|
|
object, a Python integer, or ``None``.
|
|
|
|
If :attr:`device` is a torch.device object, returns the device index if it
|
|
is a CUDA device. Note that for a CUDA device without a specified index,
|
|
i.e., ``torch.device('cuda')``, this will return the current default CUDA
|
|
device if :attr:`optional` is ``True``.
|
|
|
|
If :attr:`device` is a Python integer, it is returned as is.
|
|
|
|
If :attr:`device` is ``None``, this will return the current default CUDA
|
|
device if :attr:`optional` is ``True``.
|
|
"""
|
|
if isinstance(device, torch._six.string_classes):
|
|
device = torch.device(device)
|
|
if isinstance(device, torch.device):
|
|
dev_type = device.type
|
|
if device.type != 'cuda':
|
|
raise ValueError('Expected a cuda device, but got: {}'.format(device))
|
|
device_idx = device.index
|
|
else:
|
|
device_idx = device
|
|
if device_idx is None:
|
|
if optional:
|
|
# default cuda device index
|
|
return torch.cuda.current_device()
|
|
else:
|
|
raise ValueError('Expected a cuda device with a specified index '
|
|
'or an integer, but got: '.format(device))
|
|
return device_idx
|