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Add reduce_scatter api #1413

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Merged
valarLip merged 2 commits into from
Nov 18, 2025
Merged

Add reduce_scatter api #1413

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79cfbc7
add reduce_scatter api
ZhangLirong-amd Nov 15, 2025
21b1dda
add reduce_scatter api
ZhangLirong-amd Nov 15, 2025
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7 changes: 6 additions & 1 deletion aiter/dist/parallel_state.py
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Original file line number Diff line number Diff line change
Expand Up @@ -389,6 +389,12 @@ def _all_gather_out_place(self, input_: torch.Tensor) -> torch.Tensor:
def custom_all_gather(self, input_: torch.Tensor) -> torch.Tensor:
return outplace_all_gather(input_, group_name=self.unique_name)

def reduce_scatter(self, input_: torch.Tensor, dim: int = -1):
if self.device_communicator is None:
raise ValueError("No device communicator found")
return self.device_communicator.reduce_scatter(input_, dim)


def all_gather(
self, input_: torch.Tensor, use_custom: bool = False, dim: int = -1
) -> torch.Tensor:
Expand Down Expand Up @@ -878,7 +884,6 @@ def get_pp_group() -> GroupCoordinator:
return _PP


from typing import Optional

_DP: Optional[GroupCoordinator] = None

Expand Down