Some simple examples and advanced examples for Parallel Computing
#include <omp.h>
omp_set_num_threads(nthread);
omp_get_thread_num();
omp_get_num_threads();
#pragma omp parallel
#pragma omp for
#pragma omp parallel for private(j) reduction(+: not_primes) schedule(dynamic)
#pragma omp parallel shared(t, t_old) private(i,j,iter) firstprivate(niter) reduction(max:dt)
#include <stdio.h>
#include "mpi.h"
main(int argc, char** argv){
int my_PE_num;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_PE_num);
printf("Hello from %d.\n", my_PE_num);
MPI_Finalize();
}
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &my_PE_num);
MPI_Status status;
MPI_Recv( &numbertoreceive, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
MPI_Send( &numbertosend, 1, MPI_INT, index, 10, MPI_COMM_WORLD);
MPI_Barrier(MPI_COMM_WORLD);
MPI_Comm_rank(MPI_COMM_WORLD, &my_PE_num);
MPI_Comm_size(MPI_COMM_WORLD, &npes);
MPI_Bcast(&max_iterations, 1, MPI_INT, 0, MPI_COMM_WORLD);
MPI_Finalize();