sheet 5

Sheet_5/bsp_5_4/main.cpp

@@ -0,0 +1,47 @@
+#include "bsp_3_lib_bench_par.h"
+#include <cmath>
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+    benchmark_B(8000,8000,400);
+    benchmark_B_par(8000,8000,400);
+    benchmark_C(4000,4000,4000,1);
+    benchmark_C_par(4000,4000,4000,1);
+    benchmark_D(1e4,1e5,15);
+    benchmark_D_par(1e4,1e5,15);
+    
+    // comparing the time for sum and inner product with and without parallelization
+    cout << "\nComparing the runtime (in sec) for inner product and sum with and without parallelization\n\n";
+    for(int k=3; k<=8; ++k)
+    {
+		
+		int N = pow(10,k);
+		cout << "k = " << k << "	N = " << N << endl;
+		vector<double> v1(N,1.0/N);
+		vector<double> v2(N,N);
+		
+		auto tstart = omp_get_wtime();
+		double s = scalar(v1, v2);		
+		auto t_diff_scalar = omp_get_wtime() - tstart;
+		
+		tstart = omp_get_wtime();
+		double sp = scalar_par(v1, v2);		
+		auto t_diff_scalar_par = omp_get_wtime() - tstart;
+		
+		tstart = omp_get_wtime();
+		double su = sum(v1);		
+		auto t_diff_sum = omp_get_wtime() - tstart;
+		
+		tstart = omp_get_wtime();
+		double sup = sum_par(v1);		
+		auto t_diff_sum_par = omp_get_wtime() - tstart;
+		
+		cout << "sum	" << t_diff_sum << "	inner_prod	" << t_diff_scalar << endl;
+		cout << "sum_par	" << t_diff_sum_par << "	inner_prod_par	" << t_diff_scalar_par << endl << endl;;
+	}
+
+    return 0;
+}