| from typing import Any |
|
|
| import torch |
|
|
| |
| from torch._utils import _get_device_index as _torch_get_device_index |
|
|
|
|
| def _get_device_index( |
| device: Any, optional: bool = False, allow_cpu: bool = False |
| ) -> int: |
| r"""Get 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 MTIA device. Note that for a MTIA device without a specified index, |
| i.e., ``torch.device('mtia')``, this will return the current default MTIA |
| device if :attr:`optional` is ``True``. If :attr:`allow_cpu` is ``True``, |
| CPU devices will be accepted and ``-1`` will be returned in this case. |
| |
| If :attr:`device` is a Python integer, it is returned as is. |
| |
| If :attr:`device` is ``None``, this will return the current default MTIA |
| device if :attr:`optional` is ``True``. |
| """ |
| if isinstance(device, int): |
| return device |
| if isinstance(device, str): |
| device = torch.device(device) |
| if isinstance(device, torch.device): |
| if allow_cpu: |
| if device.type not in ["mtia", "cpu"]: |
| raise ValueError(f"Expected a mtia or cpu device, but got: {device}") |
| elif device.type != "mtia": |
| raise ValueError(f"Expected a mtia device, but got: {device}") |
| if not torch.jit.is_scripting(): |
| if isinstance(device, torch.mtia.device): |
| return device.idx |
| return _torch_get_device_index(device, optional, allow_cpu) |
|
|
