MPI处理器数量? [英] MPI Number of processors?

问题描述

以下是我在MPI中执行的代码，该代码是在i7核心CPU(四核)上运行的，但问题是它显示出它在1个处理器CPU(必须为4个)下运行.

Following is my code in MPI, which I run it over a core i7 CPU (quad core), but the problem is it shows me that it's running under 1 processor CPU, which has to be 4.

int main(int argc, char *argv[])
{
    int rank, size;

    MPI_Init(&argc, &argv);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    MPI_Comm_size(MPI_COMM_WORLD, &size);

    printf("Hello world! I am %d of %d\n", rank, size);

    MPI_Finalize();

    return 0;
}

我想知道问题出在MPI库还是其他?

I was wondering if the problem is with MPI library or sth else?

这是显示给我的结果:

Hello world! I am 0 of 1

其他信息: Windows 7-专业版x64

Additional info: Windows 7 - Professional x64

推荐答案

初步看来，您似乎正在直接运行该程序.您是否尝试使用mpiexec -n 2或-n 4?

Prima facie it looks like you are running the program directly. Did you try using mpiexec -n 2 or -n 4?

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