//[/cuRANDComputeValue]
//[cuRANDPiEstimator]
public double RunEstimation(int numSims, int threadBlockSize)
{
// Aim to launch around ten or more times as many blocks as there
// are multiprocessors on the target device.
const int blocksPerSm = 10;
var numSMs = GPUWorker.Device.Attributes.MULTIPROCESSOR_COUNT;
// Determine how to divide the work between cores
var block = new dim3(threadBlockSize);
var grid = new dim3((numSims + threadBlockSize - 1) / threadBlockSize);
while (grid.x > 2 * blocksPerSm * numSims)
{
grid.x >>= 1;
}
var n = 2 * numSims;
using (var dPoints = GPUWorker.Malloc <double>(n))
using (var dResults = GPUWorker.Malloc <double>(grid.x))
{
// Generate random points in unit square
var curand = new CURAND(GPUWorker, CURANDInterop.curandRngType.CURAND_RNG_QUASI_SOBOL64);
curand.SetQuasiRandomGeneratorDimensions(2);
curand.SetGeneratorOrdering(CURANDInterop.curandOrdering.CURAND_ORDERING_QUASI_DEFAULT);
curand.GenerateUniformDouble(dPoints.Ptr, new IntPtr(n));
var lp = new LaunchParam(grid, block, block.x * sizeof(uint));
GPULaunch(ComputeValue, lp, dResults.Ptr, dPoints.Ptr, numSims);
var value = dResults.Gather().Sum();
return((value / numSims) * 4.0);
}
}
//[/cuRANDComputeValue]
//[cuRANDPiEstimator]
public double RunEstimation(int numSims, int threadBlockSize)
{
// Aim to launch around ten or more times as many blocks as there
// are multiprocessors on the target device.
const int blocksPerSm = 10;
var numSMs = GPUWorker.Device.Attributes.MULTIPROCESSOR_COUNT;
// Determine how to divide the work between cores
var block = new dim3(threadBlockSize);
var grid = new dim3((numSims + threadBlockSize - 1) / threadBlockSize);
while (grid.x > 2 * blocksPerSm * numSims) grid.x >>= 1;
var n = 2 * numSims;
using (var dPoints = GPUWorker.Malloc<double>(n))
using (var dResults = GPUWorker.Malloc<double>(grid.x))
{
// Generate random points in unit square
var curand = new CURAND(GPUWorker, CURANDInterop.curandRngType.CURAND_RNG_QUASI_SOBOL64);
curand.SetQuasiRandomGeneratorDimensions(2);
curand.SetGeneratorOrdering(CURANDInterop.curandOrdering.CURAND_ORDERING_QUASI_DEFAULT);
curand.GenerateUniformDouble(dPoints.Ptr, new IntPtr(n));
var lp = new LaunchParam(grid, block, block.x * sizeof(uint));
GPULaunch(ComputeValue, lp, dResults.Ptr, dPoints.Ptr, numSims);
var value = dResults.Gather().Sum();
return (value/numSims)*4.0;
}
}
