问题1。
Scatterv 的“ 流离失所” 参数的目的何在? 它与 Charmev 有何不同? 它如何支持反对地址空间上的“ 重叠 ”? 您的平均 joe 迁移阵列是什么样子?
Scatterv( Object sendbuf, int sendoffset, int[] sendcounts,
int[] displs, Datatype sendtype, Object recvbuf,
int recvoffset, int recvcount, Datatype recvtype,
int root )
Gatherv( Object sendbuf, Object sendbuf, int sendoffset,
int sendcount, Datatype sendtype, Object recvbuf,
int[] recvcounts, int[] displs, Datatype recvtype,
int root )
问题2。
在 Accessv 中,两个 sendbuf 参数中的哪个参数正在接收或发送?
Q1. 在散射矢量和集合矢量操作中,间距和计数的目的都是一样的。在“散射矢量”和“集合矢量”中,两者都指定了每个数据区块起始和有多少元素所在的大型缓冲(sendbuf 在散射中,)的位置,每个数据区块的位置(sendbuf 在散射中,在散射中,(在散射中,中,这些位置的位置,这些位置用来定义每个数据区块的位置,每个区块将分散到所有进程,[code>在集合/数中,每个区块不应重叠,但是由于执行原因(如果不是所有
Q2. sendbuf , sendoffsection 和 sendcound 指定要收集的数据的本地部分。 recvbuf , recvcounts[] 和 d>displs[] 指定要收集这些本地碎片的大缓冲中的部分。
全部都写在MPI标准中,IMHO是少数可被凡人阅读的标准之一。
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