MPI_first

2021-04-07 82 words One minute views

Contents

MPI 初探

每个进程有一个特定的rank

获取进程rank:

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int world_rank;
MPI_Comm_Rank(MPI_COMM_WORLD, &world_rank);

获取总的并行进程数：

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int world_size;
MPI_Comm_Size(MPI_COMM_WORLD, &world_size)

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MPI_Send(
    void* data,
    int count,
    MPI_Type datatype,
    int destination,
    int tag,
    MPI_Comm communicator
)

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MPI_Receive(
    void* data,
    int count,
    MPI_Type datatype,
    int source,
    int tag,
    MPI_Comm communicator
)

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