我正在尝试学习MPI。当我从一个处理器向另一个处理器发送数据时,我能够成功发送数据并在另一个变量中通过另一个接收它。但是,当我尝试在两个处理器上发送和接收时,都会收到无效的排名错误。
这是我的程序代码
#include <mpi.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char **argv) {
int world_size;
int rank;
char hostname[256];
char processor_name[MPI_MAX_PROCESSOR_NAME];
int name_len;
int tag = 4;
int value = 4;
int master = 0;
int rec;
MPI_Status status;
// Initialize the MPI environment
MPI_Init(&argc,&argv);
// get the total number of processes
MPI_Comm_size(MPI_COMM_WORLD, &world_size);
// get the rank of current process
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
// get the name of the processor
MPI_Get_processor_name(processor_name, &name_len);
// get the hostname
gethostname(hostname,255);
printf("World size is %d\n",world_size);
if(rank == master){
MPI_Send(&value,1,MPI_INT,1,tag,MPI_COMM_WORLD);
MPI_Recv(&rec,1,MPI_INT,1,tag,MPI_COMM_WORLD,&status);
printf("In master with value %d\n",rec);
}
if(rank == 1){
MPI_Send(&tag,1,MPI_INT,0,tag,MPI_COMM_WORLD);
MPI_Recv(&rec,1,MPI_INT,0,tag,MPI_COMM_WORLD,&status);
printf("in slave with rank %d and value %d\n",rank, rec);
}
printf("Hello world! I am process number: %d from processor %s on host %s out of %d processors\n", rank, processor_name, hostname, world_size);
MPI_Finalize();
return 0;
}
这是我的PBS文件:
#!/bin/bash
#PBS -l nodes=1:ppn=8,walltime=1:00
#PBS -N MPIsample
#PBS -q edu_shared
#PBS -m abe
#PBS -M [email protected]
#PBS -e mpitest.err
#PBS -o mpitest.out
#PBS -d /export/home/blah/MPIsample
mpirun -machinefile $PBS_NODEFILE -np $PBS_NP ./mpitest
输出文件如下所示:
World size is 1
World size is 1
World size is 1
World size is 1
World size is 1
World size is 1
World size is 1
World size is 1
===================================================================================
= BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
= EXIT CODE: 6
= CLEANING UP REMAINING PROCESSES
= YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
===================================================================================
Job complete
如果世界尺寸为1,则世界尺寸应打印一次,而不是8次。
err文件是:
[compute-0-34.local:13110] *** An error occurred in MPI_Send
[compute-0-34.local:13110] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13110] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13110] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13107] *** An error occurred in MPI_Send
[compute-0-34.local:13107] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13107] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13107] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13112] *** An error occurred in MPI_Send
[compute-0-34.local:13112] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13112] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13112] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13108] *** An error occurred in MPI_Send
[compute-0-34.local:13108] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13108] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13108] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13109] *** An error occurred in MPI_Send
[compute-0-34.local:13109] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13109] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13109] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13113] *** An error occurred in MPI_Send
[compute-0-34.local:13113] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13113] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13113] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13106] *** An error occurred in MPI_Send
[compute-0-34.local:13106] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13106] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13106] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
[compute-0-34.local:13111] *** An error occurred in MPI_Send
[compute-0-34.local:13111] *** on communicator MPI_COMM_WORLD
[compute-0-34.local:13111] *** MPI_ERR_RANK: invalid rank
[compute-0-34.local:13111] *** MPI_ERRORS_ARE_FATAL: your MPI job will now abort
2天前,我能够同时发送和接收消息,但是此后,工作代码向我显示了此错误。我的代码或正在使用的高性能计算机是否存在任何问题?
最佳答案
从MPI的 Angular 来看,您没有启动一个包含8个MPI任务的MPI作业,而是启动了每个都有一个MPI任务的8个独立的MPI作业。
当您混用两个MPI实现时(例如,您的应用程序是使用Open MPI构建的,而您使用的是MPICH mpirun),通常会发生这种情况。
在调用mpirun
之前,我建议您添加PBS脚本
which mpirun
ldd mpitest
确保
mpirun
和MPI库来自相同的库(例如,相同的供应商和相同的版本)