问关闭OpenMPI:在多台主机上运行mpirun时出错
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Stack Overflow用户

提问于 2017-06-15 17:18:21

回答 1查看 1.5K关注 0票数 2

我已经用ompi配置了两个主机，并且我能够成功地在两个示例代码下面分别运行。

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

int main(argc,argv)
int argc;
char *argv[];  {
int numtasks, rank, dest, source, rc, count, tag=1;
char inmsg, outmsg='x';
MPI_Status Stat;

MPI_Init(&argc,&argv);
MPI_Comm_size(MPI_COMM_WORLD, &numtasks);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);

if (rank == 0) {
  dest = 1;
  source = 1;
  rc = MPI_Send(&outmsg, 1, MPI_CHAR, dest, tag, MPI_COMM_WORLD);
  rc = MPI_Recv(&inmsg, 1, MPI_CHAR, source, tag, MPI_COMM_WORLD, &Stat);
}

else if (rank == 1) {
  dest = 0;
  source = 0;
  rc = MPI_Recv(&inmsg, 1, MPI_CHAR, source, tag, MPI_COMM_WORLD, &Stat);
  rc = MPI_Send(&outmsg, 1, MPI_CHAR, dest, tag, MPI_COMM_WORLD);
}

rc = MPI_Get_count(&Stat, MPI_CHAR, &count);
printf("Task %d: Received %d char(s) from task %d with tag %d \n",
   rank, count, Stat.MPI_SOURCE, Stat.MPI_TAG);

MPI_Finalize();
}

-np 2发送Receive.o

效果很好。

mpirun -np 2--主机host1，host1 sendReceive.o

[ip-172-31-71-xx:11221] [[55975,0],1] ORTE_ERROR_LOG: Data unpack would read past end of buffer in file base/odls_base_default_fns.c at line 398
--------------------------------------------------------------------------
ORTE has lost communication with a remote daemon.

  HNP daemon   : [[55975,0],0] on node ip-172-31-78-xx
  Remote daemon: [[55975,0],1] on node ip-172-31-71-xx

This is usually due to either a failure of the TCP network
connection to the node, or possibly an internal failure of
the daemon itself. We cannot recover from this failure, and
therefore will terminate the job.
--------------------------------------------------------------------------

我验证了我可以在主机之间进行ssh并正确地配置。我不能把范围缩小到这里的问题上。有什么建议吗？

答:在每个系统中，我错误地采取了不同版本的mpi。当我更正版本，它的工作！

openmpi