在奴隶中接收数据mpi spawn c

时间:2017-03-10 23:56:31

标签: mpi spawn

我正在尝试使用mpi_comm_spawn&来实现以下场景分散:

1- Master会产生2个有工作的流程。

2-他将数组分散到那些衍生的进程。

3-生成的进程接收分散的数组,然后将其发回。

4-主设备接收数组的已排序部分。

我想知道如何进行第2步,到目前为止我已经尝试过发送和接收,它们工作得很完美,但我想用散点函数来做。

编辑:这是我想在主代码中做的事情,我错过了奴隶的部分,我收到了分散的数组

/*Master Here*/

MPI_Comm_spawn(slave, MPI_ARGV_NULL, 2, MPI_INFO_NULL,0, MPI_COMM_WORLD, &inter_comm, array_of_errcodes);

printf("MASTER Sending a message to slaves \n");
MPI_Send(message, 50, MPI_CHAR,0 , tag, inter_comm);

MPI_Scatter(array, 10, MPI_INT, &array_r, 10, MPI_INT, MPI_ROOT, inter_comm);

感谢。

1 个答案:

答案 0 :(得分:3)

<强> master.c

#include "mpi.h"

int main(int argc, char *argv[])
{ 
   int n_spawns = 2;
   MPI_Comm intercomm;

   MPI_Init(&argc, &argv);

   MPI_Comm_spawn("worker_program", MPI_ARGV_NULL, n_spawns, MPI_INFO_NULL, 0, MPI_COMM_SELF, &intercomm, MPI_ERRCODES_IGNORE); 

   int sendbuf[2] = {3, 5};
   int recvbuf; // redundant for master.

   MPI_Scatter(sendbuf, 1, MPI_INT, &recvbuf, 1, MPI_INT, MPI_ROOT, intercomm);

   MPI_Finalize();
   return 0;
}

<强> worker.c

#include "mpi.h"
#include <stdio.h>

int main(int argc, char *argv[])
{  
   MPI_Init(&argc, &argv);

   MPI_Comm intercomm; 
   MPI_Comm_get_parent(&intercomm);

   int sendbuf[2]; // redundant for worker.
   int recvbuf;

   MPI_Scatter(sendbuf, 1, MPI_INT, &recvbuf, 1, MPI_INT, 0, intercomm);
   printf("recvbuf = %d\n", recvbuf);

   MPI_Finalize();
   return 0;
}

命令行

mpicc master.c -o master_program
mpicc worker.c -o worker_program
mpirun -n 1 master_program