count of mb/s

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

int main(int argc, char** argv)
{
    int size, rank, a = 5, b = 1;
    MPI_Status status;

    MPI_Init(&argc, &argv);

    MPI_Comm_size(MPI_COMM_WORLD, &size);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
    for (int i = 0; i < 50; i++)
    {
    if(rank == i)
    {
        MPI_Send(&a, 1, MPI_INT, i+1, 123, MPI_COMM_WORLD);
        MPI_Recv(&b, 1, MPI_INT, i+1, 123, MPI_COMM_WORLD, &status);
    }
    if(rank == i+1)
    {
        MPI_Recv(&b, 1, MPI_INT, i, 123, MPI_COMM_WORLD, &status);
        MPI_Send(&b, 1, MPI_INT, i, 123, MPI_COMM_WORLD);
        printf("%d\n", b);
    }
    }


    //printf("%d\n%d\n", size, rank);
    MPI_Finalize();
}