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Add support for pin memory on custom device. #97621

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Add support for pin memory on custom device. #97621

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3 changes: 3 additions & 0 deletions torch/utils/data/_utils/pin_memory.py
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Expand Up @@ -22,6 +22,9 @@ def _pin_memory_loop(in_queue, out_queue, device_id, done_event, device):
torch.cuda.set_device(device_id)
elif device == "xpu":
torch.xpu.set_device(device_id) # type: ignore[attr-defined]
elif device == torch._C._get_privateuse1_backend_name():
custom_device_mod = getattr(torch, torch._C._get_privateuse1_backend_name())
custom_device_mod.set_device(device_id)

def do_one_step():
try:
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3 changes: 3 additions & 0 deletions torch/utils/data/dataloader.py
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Expand Up @@ -1051,6 +1051,9 @@ def __init__(self, loader):
self._data_queue = queue.Queue() # type: ignore[var-annotated]
if self._pin_memory_device == "xpu":
current_device = torch.xpu.current_device() # type: ignore[attr-defined]
elif self._pin_memory_device == torch._C._get_privateuse1_backend_name():
custom_device_mod = getattr(torch, torch._C._get_privateuse1_backend_name())
current_device = custom_device_mod.current_device()
else:
current_device = torch.cuda.current_device() # choose cuda for default
pin_memory_thread = threading.Thread(
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