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Add start of check results function

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This commit is contained in:
Tom Deakin 2016-04-27 11:35:12 +01:00
parent 6522d9114a
commit 6225ae90a7
1 changed files with 37 additions and 1 deletions
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38
src/main.cpp
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@ -1,6 +1,8 @@
#include <iostream> #include <iostream>
#include <vector> #include <vector>
#include <numeric>
#include <cmath>
#include "common.h" #include "common.h"
#include "Stream.h" #include "Stream.h"
@ -11,6 +13,9 @@ const unsigned int ARRAY_SIZE = 52428800;
#define IMPLEMENTATION_STRING "CUDA" #define IMPLEMENTATION_STRING "CUDA"
template <typename T>
void check_solution(const unsigned int ntimes, std::vector<T>& a, std::vector<T>& b, std::vector<T>& c);
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
std::cout std::cout
@ -32,10 +37,41 @@ int main(int argc, char *argv[])
stream->write_arrays(a, b, c); stream->write_arrays(a, b, c);
stream->copy(); stream->copy();
stream->mul();
stream->add();
stream->triad();
stream->read_arrays(a, b, c); stream->read_arrays(a, b, c);
std::cout << c[105] << std::endl; std::cout << a[105] << std::endl;
check_solution<double>(1, a, b, c);
delete[] stream; delete[] stream;
} }
template <typename T>
void check_solution(const unsigned int ntimes, std::vector<T>& a, std::vector<T>& b, std::vector<T>& c)
{
// Generate correct solution
T goldA = 1.0;
T goldB = 2.0;
T goldC = 0.0;
const T scalar = 3.0;
for (unsigned int i = 0; i < ntimes; i++)
{
// Do STREAM!
goldC = goldA;
goldB = scalar * goldC;
goldC = goldA + goldB;
goldA = goldB + scalar * goldC;
}
// Calculate the average error
double errA = std::accumulate(a.begin(), a.end(), 0.0, [&](double sum, const T val){ return sum + fabs(val - goldA); });
}