Previous What is the Hadamard product ? |
Parent Optimisation of Hadamard product |
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Let's write the main.cpp file :
First, we have to include the appropriate files :
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#include <iostream> #include "asterics_hpc.h" using namespace std; |
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///Do the Hadamard product /** @param[out] tabResult : table of results of tabX*tabY * @param tabX : input table * @param tabY : input table * @param nbElement : number of elements in the tables */ void hadamard_product(float* tabResult, const float* tabX, const float* tabY, long unsigned int nbElement){ for(long unsigned int i(0lu); i < nbElement; ++i){ tabResult[i] = tabX[i]*tabY[i]; } } |
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///Get the number of cycles per elements of the Hadamard product /** @param nbElement : number of elements of the tables * @param nbRepetition : number of repetition to evaluate the function hadamard_product */ void evaluateHadamardProduct(long unsigned int nbElement, long unsigned int nbRepetition){ //Allocation of the tables float * tabResult = new float[nbElement]; float * tabX = new float[nbElement]; float * tabY = new float[nbElement]; //Initialisation of the tables for(long unsigned int i(0lu); i < nbElement; ++i){ tabX[i] = (float)(i*32lu%17lu); tabY[i] = (float)(i*57lu%31lu); } //Stating the timer long unsigned int beginTime(rdtsc()); for(long unsigned int i(0lu); i < nbRepetition; ++i){ hadamard_product(tabResult, tabX, tabY, nbElement); } //Get the time of the nbRepetition calls long unsigned int elapsedTime((double)(rdtsc() - beginTime)/((double)nbRepetition)); double cyclePerElement(((double)elapsedTime)/((double)nbElement)); cout << "evaluateHadamardProduct : nbElement = "<<nbElement<<", cyclePerElement = " << cyclePerElement << " cy/el, elapsedTime = " << elapsedTime << " cy" << endl; cerr << nbElement << "\t" << cyclePerElement << "\t" << elapsedTime << endl; //Deallocate the tables delete[] tabResult; delete[] tabX; delete[] tabY; } |
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int main(int argc, char** argv){ cout << "Hadamard product" << endl; evaluateHadamardProduct(1000lu, 1000000lu); evaluateHadamardProduct(2000lu, 1000000lu); evaluateHadamardProduct(3000lu, 1000000lu); evaluateHadamardProduct(5000lu, 1000000lu); evaluateHadamardProduct(10000lu, 1000000lu); return 0; } |
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/*************************************** Auteur : Pierre Aubert Mail : aubertp7@gmail.com Licence : CeCILL-C ****************************************/ #include <iostream> #include "asterics_hpc.h" using namespace std; ///Do the Hadamard product /** @param[out] tabResult : table of results of tabX*tabY * @param tabX : input table * @param tabY : input table * @param nbElement : number of elements in the tables */ void hadamard_product(float* tabResult, const float* tabX, const float* tabY, long unsigned int nbElement){ for(long unsigned int i(0lu); i < nbElement; ++i){ tabResult[i] = tabX[i]*tabY[i]; } } ///Get the number of cycles per elements of the Hadamard product /** @param nbElement : number of elements of the tables * @param nbRepetition : number of repetition to evaluate the function hadamard_product */ void evaluateHadamardProduct(long unsigned int nbElement, long unsigned int nbRepetition){ //Allocation of the tables float * tabResult = new float[nbElement]; float * tabX = new float[nbElement]; float * tabY = new float[nbElement]; //Initialisation of the tables for(long unsigned int i(0lu); i < nbElement; ++i){ tabX[i] = (float)(i*32lu%17lu); tabY[i] = (float)(i*57lu%31lu); } //Stating the timer long unsigned int beginTime(rdtsc()); for(long unsigned int i(0lu); i < nbRepetition; ++i){ hadamard_product(tabResult, tabX, tabY, nbElement); } //Get the time of the nbRepetition calls long unsigned int elapsedTime((double)(rdtsc() - beginTime)/((double)nbRepetition)); double cyclePerElement(((double)elapsedTime)/((double)nbElement)); cout << "evaluateHadamardProduct : nbElement = "<<nbElement<<", cyclePerElement = " << cyclePerElement << " cy/el, elapsedTime = " << elapsedTime << " cy" << endl; cerr << nbElement << "\t" << cyclePerElement << "\t" << elapsedTime << endl; //Deallocate the tables delete[] tabResult; delete[] tabX; delete[] tabY; } int main(int argc, char** argv){ cout << "Hadamard product" << endl; evaluateHadamardProduct(1000lu, 1000000lu); evaluateHadamardProduct(2000lu, 1000000lu); evaluateHadamardProduct(3000lu, 1000000lu); evaluateHadamardProduct(5000lu, 1000000lu); evaluateHadamardProduct(10000lu, 1000000lu); return 0; } |
Previous What is the Hadamard product ? |
Parent Optimisation of Hadamard product |
Outline | Next The CMakeLists.txt file |