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LiYuRio
changed the title
Implement reshard from s to r with same process_mesh
[Reshard]Implement reshard from s to r with same process_mesh
Aug 8, 2023
LiYuRio
changed the title
[Reshard]Implement reshard from s to r with same process_mesh
[Reshard] Implement reshard from s to r with same process_mesh
Aug 8, 2023
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Description
Pcard-73145
支持Shard到Replicate的状态转换,要求:
输入输出的process_mesh为一维;
输出输出不跨mesh;(process_mesh无变化)
输入的shard状态为均匀切分,Tensor的切分维度能被对应组的进程数整除。
以4卡为例,输入输出都是一维process_mesh,[0, 1, 2, 3],输出为二维Replicate状态,out_dims_mapping = [-1, -1],输入为二维Shard状态,in_tensor_shape = [4, 8]
TODO: