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[TPU] Skip creating empty tensor (#7630)

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Woosuk Kwon 2024-08-17 14:22:46 -07:00 committed by GitHub
parent bbf55c4805
commit ce143353c6
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1 changed files with 4 additions and 1 deletions
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vllm/worker/tpu_worker.py
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@ -271,7 +271,10 @@ def _make_src_to_dst(
mapping: List[Tuple[int, int]], mapping: List[Tuple[int, int]],
src_device: Union[torch.device, str], src_device: Union[torch.device, str],
dst_device: Union[torch.device, str], dst_device: Union[torch.device, str],
) -> Tuple[torch.Tensor, torch.Tensor]: ) -> Optional[Tuple[torch.Tensor, torch.Tensor]]:
if not mapping:
return None
src_indices = [i for i, _ in mapping] src_indices = [i for i, _ in mapping]
dst_indices = [i for _, i in mapping] dst_indices = [i for _, i in mapping]
src_indices = torch.tensor(src_indices, src_indices = torch.tensor(src_indices,