added first version of gpu performance tests

samples/gpu/performance/performance.cpp

@@ -0,0 +1,93 @@
+#include <iomanip>
+#include "performance.h"
+
+using namespace std;
+using namespace cv;
+
+
+void Test::gen(Mat& mat, int rows, int cols, int type, Scalar low, Scalar high)
+{   
+    mat.create(rows, cols, type);
+
+    RNG rng(0);
+    rng.fill(mat, RNG::UNIFORM, low, high);
+}
+
+
+void Test::gen(Mat& mat, int rows, int cols, int type)
+{   
+    mat.create(rows, cols, type);
+
+    Mat mat8u(rows, cols * mat.elemSize(), CV_8U, mat.data, mat.step);
+
+    RNG rng(0);
+    rng.fill(mat, RNG::UNIFORM, Scalar(0), Scalar(256));
+}
+
+
+void TestSystem::run()
+{
+    cout << setiosflags(ios_base::left);
+    cout << "    " << setw(10) << "CPU, ms" << setw(10) << "GPU, ms" 
+        << setw(10) << "SPEEDUP" << "DESCRIPTION\n";
+    cout << resetiosflags(ios_base::left);
+
+    vector<Test*>::iterator it = tests_.begin();
+    for (; it != tests_.end(); ++it)
+    {
+        can_flush_ = false;
+        Test* test = *it;
+
+        cout << endl << test->name() << ":\n";
+        test->run();
+
+        flush();
+    }
+
+    cout << setiosflags(ios_base::fixed | ios_base::left);
+    cout << "\nCPU Total: " << setprecision(3) << cpu_total_ / getTickFrequency() << " sec\n";
+    cout << "GPU Total: " << setprecision(3) << gpu_total_ / getTickFrequency() << " sec (x" 
+        << setprecision(3) << (double)cpu_total_ / gpu_total_ << ")\n";
+    cout << resetiosflags(ios_base::fixed | ios_base::left);
+}
+
+
+void TestSystem::flush()
+{
+    if (!can_flush_)
+        return;
+
+    int cpu_time = static_cast<int>(cpu_elapsed_ / getTickFrequency() * 1000.0);
+    int gpu_time = static_cast<int>(gpu_elapsed_ / getTickFrequency() * 1000.0);
+    double speedup = (double)cpu_time / gpu_time;
+
+    cpu_elapsed_ = 0;
+    gpu_elapsed_ = 0;
+
+    cout << "    " << setiosflags(ios_base::fixed | ios_base::left);
+
+    stringstream stream;
+    stream << cpu_time;
+    cout << setw(10) << stream.str();
+
+    stream.str("");
+    stream << gpu_time;
+    cout << setw(10) << stream.str();
+
+    stream.str("");
+    stream << "x" << setprecision(3) << speedup;
+    cout << setw(10) << stream.str();
+
+    cout << description_.str();
+    description_.str("");
+
+    cout << resetiosflags(ios_base::fixed | ios_base::left) << endl;
+    can_flush_ = false;
+}
+
+
+int main()
+{
+    TestSystem::instance()->run();
+    return 0;
+}