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我知道 MPI_SEND 将被暂停,直到 MPI_RECV 在目标节点中执行。MPI_Bcast 呢?是否需要等到所有其他节点都收到它?
MPI_Bcast 是一个集体操作,所以通信器中的所有等级都必须调用它。当它返回成功时,保证数据传输已经完成。