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#include <iostream>
#include "asterics_hpc.h"
using namespace std;
///Do the Hadamard product
/** @param tabValue : input table
* @param nbElement : number of elements in the input table
* @return sum of all the elements of the input table
*/
float reduction(const float * tabValue, long unsigned int nbElement){
float res(0.0f);
for(long unsigned int i(0lu); i < nbElement; ++i){
res += tabValue[i];
}
return res;
}
///Get the number of cycles per elements of the reduction
/** @param nbElement : number of elements of the tables
* @param nbRepetition : number of repetition to evaluate the function reduction
*/
void evaluateReduction(long unsigned int nbElement, long unsigned int nbRepetition){
float * tabValue = (float*)asterics_malloc(sizeof(float)*nbElement);
for(long unsigned int i(0lu); i < nbElement; ++i){
tabValue[i] = (float)(i*32lu%17lu);
}
long unsigned int beginTime(rdtsc());
for(long unsigned int i(0lu); i < nbRepetition; ++i){
reduction(tabValue, nbElement);
}
long unsigned int elapsedTime((double)(rdtsc() - beginTime)/((double)nbRepetition));
double cyclePerElement(((double)elapsedTime)/((double)nbElement));
cout << "evaluateReduction : nbElement = "<<nbElement<<", cyclePerElement = " << cyclePerElement << " cy/el, elapsedTime = " << elapsedTime << " cy" << endl;
cerr << nbElement << "\t" << cyclePerElement << "\t" << elapsedTime << endl;
asterics_free(tabValue);
}
int main(int argc, char** argv){
cout << "Reduction" << endl;
evaluateReduction(1000lu, 1000000lu);
evaluateReduction(2000lu, 1000000lu);
evaluateReduction(3000lu, 1000000lu);
evaluateReduction(5000lu, 1000000lu);
evaluateReduction(10000lu, 1000000lu);
return 0;
}
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