[Reshard] Support reshard with same status but different mesh #57568
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Description
Pcard-73145
相同状态但跨mesh的转换,用于支持常规的流水并行转换。目前要求mesh的形状相同,即暂时不支持出现[0, 1, 2, 3]到[0,1, 2, 3, 4, 5, 6, 7]的转换。核心用send/recv实现,会用所有参与点对点通信的进程组成一个大的通信组,按顺序依次进行通信。
TODO: