add precise Timer

miklos/project_integration/kernel.cu

 #include "kernel.h"
+#include "timer.h"
+
 #include <algorithm>
+#include <stdio.h>
 
 template<typename T>
 __device__ __host__ T min(T a, T b)
@@ -118,6 +121,11 @@ void executeKernel(void *d_in, void *d_out, size_t w, size_t h)
     float *d_U = reinterpret_cast<float *>(d_in);
     uchar4 *pixel = reinterpret_cast<uchar4 *>(d_out);
 
+    static Timer timer;
+    timer.end();
+    printf("time: %.2fms (%.2f FPS)\n", timer.get() * 1E3F, 1.F / timer.get());
+    timer.start();
+
     dim3 dimBlock(32, 16);
     dim3 dimGrid = make_grid(dim3(w, h, 1), dimBlock);
 
@@ -151,6 +159,4 @@ void executeKernel(void *d_in, void *d_out, size_t w, size_t h)
     cudaFree(d_F);
     cudaFree(d_Xi);
     cudaFree(d_Xj);
-
-//    createVertices<<<dimGrid, dimBlock>>>(in, pixel, w, h);
 }

miklos/project_integration/timer.h

+#ifndef TIMER_H
+#define TIMER_H
+
+#include <time.h>
+
+// measuring time
+class Timer
+{
+    public:
+	Timer() : running(false), sec(0)
+	{
+	}
+	void start()
+	{
+        clock_gettime(CLOCK_MONOTONIC, &tStart);
+		running = true;
+	}
+	void end()
+	{
+		if (!running) { sec = 0; return; }
+        struct timespec tEnd;
+        clock_gettime(CLOCK_MONOTONIC, &tEnd);
+        sec = (tEnd.tv_sec - tStart.tv_sec) + (tEnd.tv_nsec - tStart.tv_nsec) * 1E-9F;
+		running = false;
+	}
+	float get()
+	{
+		if (running) end();
+		return sec;
+	}
+    private:
+    struct timespec tStart;
+	bool running;
+	float sec;
+};
+
+#endif // TIMER_H