static double GetGFlops(ComputeMethod Method, bool IsFloat)
{
int upper = 10000000;
float[] fvalues = Enumerable.Range(0, upper).Select(x => Convert.ToSingle(x)).ToArray();
double[] dvalues = Enumerable.Range(0, upper).Select(x => Convert.ToDouble(x)).ToArray();
long worksize = upper / 1000000;
if (IsFloat)
{
Method.Invoke(worksize, fvalues, 2.0f); //invoke once to cache everything
}
else
{
Method.Invoke(worksize, dvalues, 2.0); //invoke once to cache everything
}
Stopwatch watch = Stopwatch.StartNew();
while (watch.Elapsed.TotalMilliseconds < 25) //loop until 25ms or 10000000 elements
{
watch.Restart();
if (IsFloat)
{
Method.Invoke(worksize);
}
else
{
Method.Invoke(worksize);
}
if (worksize == upper)
{
break;
}
worksize = Math.Min(worksize * 2, upper);
}
double flops = (double)4096 * worksize / (watch.Elapsed.TotalSeconds);
double gflops = (flops / 1000000000.0);
return(gflops);
}
public static double GetDeviceBandwidth_GBps(AcceleratorDevice Device)
{
ComputeMethod method = new ComputeMethod(Kernels.PerformanceKernel, "Bandwidth", Device);
int[] values = Enumerable.Range(0, 1000000).ToArray();
double bytes = values.Length * sizeof(int);
method.Invoke(values.Length, values);
method.Invoke(values.Length);
Stopwatch total = Stopwatch.StartNew();
method.Invoke(values.Length);
double bytespersec = bytes / total.Elapsed.TotalSeconds;
double GBytespersec = bytespersec / (8 * 1000 * 1000 * 1000.0);
return(GBytespersec);
}
public static double GetDeviceGFlops_Single(AcceleratorDevice Device)
{
ComputeMethod method = new ComputeMethod(Kernels.PerformanceKernel, "SinglePerformance", Device);
return(GetGFlops(method, true));
}