ReduceOp¶

class paddle.distributed. ReduceOp [source]

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

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]]