java - how 2D array pass in MPJ (other than object form)

Question

I want to send adjacency matrix through MPJ, and one solution of that is to send the 2-d array in the form of an object, and a second solution is to send the 2-d array as one-dimensional array, i.e. a[N*N].

However, I wish to send the 2-d array in its original form -- is it supported by MPJ? If so, how should I approach it?

Answer 1

我最喜欢的方法是将二维数组作为一维对象数组发送，其中每个对象都是一维数组。

例如，如果你想发送int A[M][N]，你可以简单地做

MPI.COMM_WORLD.Send(A, 0, M, MPI.OBJECT, TARGET_ID, MESSAGE_ID);

要接收，可以先创建一个缓冲区，然后使用 MPI Receive：

int buffer[][] = new int[M][N];
MPI.COMM_WORLD.Send(buffer, 0, M, MPI.OBJECT, SENDER_ID, MESSAGE_ID);

请注意，MPI 命令中的偏移量和长度对应于最外层数组的索引。

希望能帮助到你！