CentOS 8 install MPICH
1. download MPICH rpm
$ su -
$ dnf install mpi*
2. setup PATH variable about MPI bin PATH in /etc/bashrc or ~/.basrhc and source it
$ export PATH = /usr/lib64/mpich/bin # for bashrc
3. test mpicc or mpif
test C code saved as hellompi.c :
#include <mpi.h>
#include <stdio.h>
int main(int argc,char** argv)
{
int id, nums, nlength;
char node_name[MPI_MAX_PROCESSOR_NAME];
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD,&id);
MPI_Comm_size(MPI_COMM_WORLD,&nums);
MPI_Get_processor_name(node_name,&nlength);
printf("Hello, MPI! thread %d of %d on %s\n",
id, nums, node_name);
MPI_Finalize();
return 0;
}
4. compile by mpicc
$ mpicc -O2 -o hellompi hellompi.c
5. test hellompi
$ mpirun -np 8 hellompi
$ su -
$ dnf install mpi*
2. setup PATH variable about MPI bin PATH in /etc/bashrc or ~/.basrhc and source it
$ export PATH = /usr/lib64/mpich/bin # for bashrc
3. test mpicc or mpif
test C code saved as hellompi.c :
#include <mpi.h>
#include <stdio.h>
int main(int argc,char** argv)
{
int id, nums, nlength;
char node_name[MPI_MAX_PROCESSOR_NAME];
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD,&id);
MPI_Comm_size(MPI_COMM_WORLD,&nums);
MPI_Get_processor_name(node_name,&nlength);
printf("Hello, MPI! thread %d of %d on %s\n",
id, nums, node_name);
MPI_Finalize();
return 0;
}
4. compile by mpicc
$ mpicc -O2 -o hellompi hellompi.c
5. test hellompi
$ mpirun -np 8 hellompi
