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add doc for ReduceOp #28051

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merged 4 commits into from
Oct 19, 2020
Merged

add doc for ReduceOp #28051

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add doc, test=document_fix
Oct 19, 2020
3a0358a
update, test=document_fix
Oct 19, 2020
3520f0c
update, test=document_fix
Oct 19, 2020
f2a6f86
update, test=document_fix
Oct 19, 2020
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32 changes: 31 additions & 1 deletion python/paddle/distributed/collective.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,37 @@


class ReduceOp:
"""Reduce Operation"""
"""
Specify the type of operation used for element-wise reductions.
It should be one of the following values:

ReduceOp.SUM

ReduceOp.MAX

ReduceOp.MIN

ReduceOp.PROD

Examples:
.. code-block:: python

import numpy as np
import paddle
from paddle.distributed import ReduceOp
from paddle.distributed import init_parallel_env

paddle.set_device('gpu:%d'%paddle.distributed.ParallelEnv().dev_id)
init_parallel_env()
if paddle.distributed.ParallelEnv().local_rank == 0:
np_data = np.array([[4, 5, 6], [4, 5, 6]])
else:
np_data = np.array([[1, 2, 3], [1, 2, 3]])
data = paddle.to_tensor(np_data)
paddle.distributed.all_reduce(data, op=ReduceOp.SUM)
out = data.numpy()
# [[5, 7, 9], [5, 7, 9]]
"""
SUM = 0
MAX = 1
MIN = 2
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