37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from typing import List, Union
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import paddle
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def all_gather(tensor: paddle.Tensor, concat: bool=True,
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axis: int=0) -> Union[paddle.Tensor, List[paddle.Tensor]]:
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"""Gather tensor from all devices, concatenate them along given axis if specified.
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Args:
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tensor (paddle.Tensor): Tensor to be gathered from all GPUs.
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concat (bool, optional): Whether to concatenate gathered Tensors. Defaults to True.
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axis (int, optional): Axis which concatenated along. Defaults to 0.
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Returns:
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Union[paddle.Tensor, List[paddle.Tensor]]: Gathered Tensors
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"""
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result = []
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paddle.distributed.all_gather(result, tensor)
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if concat:
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return paddle.concat(result, axis)
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return result
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