Install MPI

Installation via apt:

sudo apt update
sudo apt install build-essential
sudo apt install mpich
sudo apt install libmpich-dev

Here are the steps:

Step 1 – Update the repository

sudo apt update

Step 2 – Install build essentials

To install build essentials read this post.

Step 3 – Install mpich

sudo apt install mpich

Step 4 – Install MPI development libraries

sudo apt install libmpich-dev

Step 5 – Install your desired IDE (optional)

The recommended IDE for C/C++ is Netbeans.

On how to install Netbeans read this article.

Step 6 – Create an MPI project

Create a new C/C++ project in Netbeans. Then perform the following steps:

1. Set Warning level to More warnings
2. Set compile tool to mpicc
3. Configure: mpiexec -n 4 “${OUTPUT_PATH}” as the default run command (set n as appropriate)
4. Compile and test an mpi hello world project like the one shown below:

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

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

    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank); 
    MPI_Comm_size(MPI_COMM_WORLD, &size);
    printf("Hello world from process %d of %d\n", rank, size);
    MPI_Finalize();
    return 0;
}