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  1. #include <iostream>
  2. #include <vector>
  3. #include <omp.h>
  4.  
  5. #define VECTOR_SIZE 1000000
  6.  
  7. int main() {
  8.     std::vector<int> vec1(VECTOR_SIZE, 1);
  9.     std::vector<int> vec2(VECTOR_SIZE, 2);
  10.  
  11.     int dot_product = 0;
  12.  
  13.     // Static scheduling
  14.     #pragma omp parallel for reduction(+:dot_product) schedule(static)
  15.     for (int i = 0; i < VECTOR_SIZE; ++i) {
  16.         dot_product += vec1[i] * vec2[i];
  17.     }
  18.  
  19.     std::cout << "Dot product using static scheduling: " << dot_product << std::endl;
  20.  
  21.     dot_product = 0;
  22.  
  23.     // Dynamic scheduling
  24.     #pragma omp parallel for reduction(+:dot_product) schedule(dynamic)
  25.     for (int i = 0; i < VECTOR_SIZE; ++i) {
  26.         dot_product += vec1[i] * vec2[i];
  27.     }
  28.  
  29.     std::cout << "Dot product using dynamic scheduling: " << dot_product << std::endl;
  30.  
  31.     dot_product = 0;
  32.  
  33.     // Guided scheduling
  34.     #pragma omp parallel for reduction(+:dot_product) schedule(guided)
  35.     for (int i = 0; i < VECTOR_SIZE; ++i) {
  36.         dot_product += vec1[i] * vec2[i];
  37.     }
  38.  
  39.     std::cout << "Dot product using guided scheduling: " << dot_product << std::endl;
  40.  
  41.     return 0;
  42. }
Success #stdin #stdout 0.01s 10876KB
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Dot product using static scheduling: 2000000
Dot product using dynamic scheduling: 2000000
Dot product using guided scheduling: 2000000
https://ideone.com/uS90Lg
language:
C++ (gcc 8.3)
created:
21 days ago
visibility:
public

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