static void Main()
{
const int DataSize = 1024;
const CuBlasAPIVersion CuBlasVersion = CuBlasAPIVersion.V10;
using (var context = new Context())
{
// Enable algorithms library
context.EnableAlgorithms();
// Check for Cuda support
foreach (var acceleratorId in CudaAccelerator.CudaAccelerators)
{
using (var accelerator = new CudaAccelerator(context, acceleratorId))
{
Console.WriteLine($"Performing operations on {accelerator}");
var buf = accelerator.Allocate <float>(DataSize);
var buf2 = accelerator.Allocate <float>(DataSize);
accelerator.Initialize(accelerator.DefaultStream, buf, 1.0f);
accelerator.Initialize(accelerator.DefaultStream, buf2.View, 1.0f);
// Initialize the CuBlas library using manual pointer mode handling
// (default behavior)
using (var blas = new CuBlas(accelerator, CuBlasVersion))
{
// Set pointer mode to Host to enable data transfer to CPU memory
blas.PointerMode = CuBlasPointerMode.Host;
float output = blas.Nrm2(buf);
// Set pointer mode to Device to enable data transfer to GPU memory
blas.PointerMode = CuBlasPointerMode.Device;
blas.Nrm2(buf, buf2);
// Use pointer mode scopes to recover the previous pointer mode
using (var scope = blas.BeginPointerScope(CuBlasPointerMode.Host))
{
float output2 = blas.Nrm2(buf);
}
}
// Initialize the CuBlas<T> library using custom pointer mode handlers
using (var blas = new CuBlas <CuBlasPointerModeHandlers.AutomaticMode>(accelerator, CuBlasVersion))
{
// Automatic transfer to host
float output = blas.Nrm2(buf);
// Automatic transfer to device
blas.Nrm2(buf, buf2);
}
}
}
}
}