parallel-display at the slave side

2010年2月4日 8:47

I wanna do parallel rendering via mpich2. First I worked on a simple program, however I could not observe the message "Hello 1" for instance on a slave. what I did on the master side is to run wmpiexec.exe by specifying all the host names, and do nothing at slave sides.
Could anybody give me a hand? Thank you.

#include "mpi.h"
#include <cstdio>
#include <math.h>

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

    int myid,numprocs;
    int namelen;
    char processor_name[MPI_MAX_PROCESSOR_NAME];

    MPI_Init(&argc,&argv);
    MPI_Comm_rank(MPI_COMM_WORLD,&myid);       
    MPI_Comm_size(MPI_COMM_WORLD,&numprocs);   
    MPI_Get_processor_name(processor_name,&namelen);

    if(myid != 0){
       printf("Hello %d", myid);  //this is what I what to see at the screen of slaves!!!
    }
    printf(" Process %d of %d SAY HELLO TO MPI on %s\n",myid, numprocs, processor_name);  
    MPI_Finalize(); 
    return 0;
}

全部回复

2010年2月6日 4:37

0
with MPICH2 and with MSMPI the stdout/error from the individual programs are redirected to mpiexec. You should see the output from all your ranks at mpiexec console.
Note that mpiexec has a -l (lowercase L) which prefix each line with the rank id.

thanks,
.Erez
- 已标记为答案 Don PatteeModerator 2011年1月12日 2:50
- 回复
- 引用
2010年2月8日 1:37

0

yes, I do see the output from all ranks at mpiexec console of the master node.
I thought with the following line, I should see "Hello 1" at slave 1 for instance.
if (myid != 0) {printf("Hello, %d",myid):}

What should I do in order to realize this functionality? Thank you.
- 回复
- 引用