1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
|
from typing import Optional
import torch
from torch.types import Device as _device_t
def _get_device_index(device: _device_t, optional: bool = False) -> int:
if isinstance(device, int):
return device
if isinstance(device, str):
device = torch.device(device)
device_index: Optional[int] = None
if isinstance(device, torch.device):
if torch.accelerator.current_accelerator().type != device.type:
raise ValueError(
f"{device.type} doesn't match the current accelerator {torch.accelerator.current_accelerator()}."
)
device_index = device.index
if device_index is None:
if not optional:
raise ValueError(
f"Expected a torch.device with a specified index or an integer, but got:{device}"
)
return torch.accelerator.current_device_index()
return device_index
|