private static void Performance()
{
using (var context = new Context())
{
using (var accelerator = new CudaAccelerator(context))
{
using (var b = accelerator.CreateBackend())
{
using (var c = accelerator.Context.CreateCompileUnit(b))
{
var method = typeof(Program).GetMethod("MathKernel", BindingFlags.Static | BindingFlags.Public);
var compiled = b.Compile(c, method);
var kernel = accelerator.LoadAutoGroupedStreamKernel<Index2, ArrayView2D<float>>(MathKernel);
//var kernel = accelerator.LoadAutoGroupedKernel(compiled);
int size = 100000;
var W = new[] { 50 };
var H = new[] { 50 };
for (int n = 0; n < W.Length; n++)
{
for (int m = 0; m < H.Length; m++)
{
int x = W[n];
int y = H[m];
Console.WriteLine($"\n\nW {x}, H {y} \n\n");
//var watch = Stopwatch.StartNew();
//for (int k = 0; k < size; k++)
//{
// var v = new float[x, y];
// for (int i = 0; i < x; i++)
// {
// for (int j = 0; j < y; j++)
// {
// v[i, j] = (float)Math.Sqrt(i * j);
// }
// }
//}
//watch.Stop();
//Console.WriteLine($"\n\nElapsed CPU Time Linear: {watch.ElapsedMilliseconds}ms\n");
//GC.Collect();
//
//watch = Stopwatch.StartNew();
//Parallel.For(0, size, k =>
//{
// var v = new float[x, y];
// Parallel.For(0, x, i =>
// {
// Parallel.For(0, y, j =>
// {
// v[i, j] = (float)Math.Sqrt(i * j);
// });
// });
//});
//watch.Stop();
//Console.WriteLine($"Elapsed CPU Time Parallel: {watch.ElapsedMilliseconds}ms\n\n");
//GC.Collect();
//var watch = Stopwatch.StartNew();
//for (int k = 0; k < size; k++)
//{
// var idx = new Index2(x, y);
// var buffer = accelerator.Allocate<float>(idx);
// kernel(idx, buffer.View);
// accelerator.Synchronize();
// buffer.Dispose();
//}
//watch.Stop();
//Console.WriteLine($"\n\nElapsed GPU Time Linear: {watch.ElapsedMilliseconds}ms\n");
//GC.Collect();
var kn = Enumerable.Repeat(accelerator.LoadAutoGroupedStreamKernel<Index2, ArrayView2D<float>>(MathKernel), size).ToList();
var watch = Stopwatch.StartNew();
Parallel.For(0, size, k =>
{
var idx = new Index2(x, y);
var buffer = accelerator.Allocate<float>(idx);
//kn[k](idx, buffer.View);
//kernel.Launch(idx, buffer.View);
kernel(idx, buffer.View);
accelerator.Synchronize();
buffer.Dispose();
});
watch.Stop();
Console.WriteLine($"Elapsed GPU Time Parallel: {watch.ElapsedMilliseconds}ms\n\n");
GC.Collect();
}
}
}
}
}
}
}
