mpi_hello_world.c
286888735b82master

mpi_hello_world.c
View Options

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

			int main(int argc, char** argv) {
			// Initialize the MPI environment
			MPI_Init(NULL, NULL);

			// Get the number of processes
			int world_size;
			MPI_Comm_size(MPI_COMM_WORLD, &world_size);

			// Get the rank of the process
			int world_rank;
			MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);

			// Get the name of the processor
			char processor_name[MPI_MAX_PROCESSOR_NAME];
			int name_len;
			MPI_Get_processor_name(processor_name, &name_len);

			// get CPU id used by the process
			int cpu_id = get_cpu_id();

			// Print off a hello world message
			printf("Hello world from host %s core %d, processor rank %d"
			" out of %d processors\n", processor_name, cpu_id,
			world_rank, world_size);

			// Finalize the MPI environment.
			MPI_Finalize();
			}