Initial commit

Makefile

+SRC = openMp.c
+
+#Compiler
+CC = gcc
+CFLAGS = -Wall -g -fopenmp -lgomp
+#Executable name
+EXE = ./out
+
+
+all: $(EXE) 
+
+$(EXE): $(SRC)
+	$(CC) -fopenmp -o $(EXE) $(SRC) 
+
+clean:
+	rm -f $(EXE)
+
+run:
+	 $(EXE)
+   
+   
+
+

Mpi.c

+ #include <stdio.h>
+#include <mpi.h>
+
+static long num_steps = 100000;
+double step;
+
+int main(int argc, char *argv[]) {
+    int rank, size;
+    double local_sum = 0.0;
+    double total_sum = 0.0;
+    double start_time, end_time;
+
+    MPI_Init(&argc, &argv);
+    MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+    MPI_Comm_size(MPI_COMM_WORLD, &size);
+
+    int local_num_steps = num_steps / size;
+    step = 1.0 / (double)num_steps;
+
+    // Measure execution time of the computation
+    MPI_Barrier(MPI_COMM_WORLD);
+    start_time = MPI_Wtime();
+
+    for (int i = rank * local_num_steps; i < (rank + 1) * local_num_steps; i++) {
+        double x = (i + 0.5) * step;
+        local_sum += x * x * step;
+    }
+
+    end_time = MPI_Wtime();
+
+    // Reduce local sums to obtain the total sum
+    MPI_Reduce(&local_sum, &total_sum, 1, MPI_DOUBLE, MPI_SUM, 0, MPI_COMM_WORLD);
+
+    if (rank == 0) {
+        printf("The value of the definite integral is: %f\n", total_sum);
+        printf("Computation execution time: %f seconds\n", end_time - start_time);
+    }
+
+    MPI_Finalize();
+    return 0;
+}
+
+ 

mpi_hosts

+
+master
+slave1 user=mpiuser 
+slave2 user=mpiuser

mpi_hosts.save

+
+maste
+r slave1 user=mpiuser slave2 user=mpiuser

openMp.c

+#include <stdio.h>
+#include <omp.h>
+
+static long num_steps = 100000;
+double step;
+
+int main() {
+    int i;
+    double x, sum = 0.0;
+    double start_time, end_time;
+
+    step = 1.0 / (double)num_steps;
+
+    // Measure execution time of the computation
+    start_time = omp_get_wtime();
+
+    #pragma omp parallel for private(x) reduction(+:sum) schedule(static) num_threads(4)
+    for (i = 0; i < num_steps; i++) {
+        x = (i + 0.5) * step;
+        sum += x * x * step;
+    }
+
+    end_time = omp_get_wtime();
+
+    printf("Value of the integral is: %f\n", sum);
+    printf("Computation execution time: %f seconds\n", end_time - start_time);
+
+    return 0;
+}