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116 lines
2.1 KiB
116 lines
2.1 KiB
#include <iostream>
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#include <cstdlib>
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#include <cmath>
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#include <omp.h>
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#include "Ttiming.h"
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using namespace std;
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void array_alloc(long **&arr, long arrsize)
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{
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try
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{
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arr = new long* [arrsize];
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arr[0] = new long [arrsize*arrsize];
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for(long i = 1; i < arrsize; ++i)
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arr[i] = arr[i-1] + arrsize;
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}
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catch (bad_alloc& ex)
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{
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cerr << "Could not allocate memory for array" << endl;
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exit(1);
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}
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}
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void array_destroy(long **arr)
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{
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delete [] arr[0];
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delete [] arr;
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}
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int main(int argc, char *argv[])
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{
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long **A=NULL, **B=NULL, **C=NULL;
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long rozmiar=0;
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char *endptr;
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int threads_num=0;
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TTiming tt;
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long i, j;//,k;
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if (argc < 3)
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{
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cerr << "Usage: " << argv[0] << " <n> <size>" << endl;
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exit(1);
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}
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rozmiar = strtol(argv[2], &endptr, 10);
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if (*endptr)
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{
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cerr << "Invalid array size format" << endl;
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exit(1);
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}
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if (rozmiar <= 0 || rozmiar > 2000)
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{
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cerr << "The number of matrix dimension must be in range [1,2000]" << endl;
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exit(1);
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}
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threads_num = strtol(argv[1], &endptr, 10);
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if (*endptr)
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{
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cerr << "Invalid number of threads format" << endl;
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exit(1);
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}
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if (threads_num <= 0)
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{
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cerr << "The number of threads must be positive" << endl;
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exit(1);
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}
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//ustawienie odpowiedniej ilosci watkow
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omp_set_num_threads(threads_num);
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//alokacja macierzy
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array_alloc(A, rozmiar);
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array_alloc(B, rozmiar);
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array_alloc(C, rozmiar);
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//wypelnienie macierzy A liczbami "losowymi"
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for (long i=0; i<rozmiar; ++i)
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for (long j=0; j<rozmiar; ++j)
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A[i][j] = (long)(sin(i) * i * j) % 10;
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//wypelnienie macierzy B liczbami "losowymi"
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for (long i=0; i<rozmiar; ++i)
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for (long j=0; j<rozmiar; ++j)
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B[i][j] = (long)(cos(j) *(i+j)) % 10;
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tt.Begin();
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//#pragma omp parallel for default(shared)
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#pragma omp parallel for default(none) shared(A, B, C) firstprivate(rozmiar)private(i, j)
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for (i=0; i<rozmiar; ++i)
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for (j=0; j<rozmiar; ++j)
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{
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C[i][j] = 0;
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for (long k=0; k<rozmiar; ++k)
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C[i][j] += A[i][k]*B[k][j];
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}
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long elapsed = tt.End();
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cout << "Time: " << elapsed << " ms" << endl;
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array_destroy(A);
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array_destroy(B);
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array_destroy(C);
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exit(0);
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}
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