unsafe static IntPtr RegisterVerticesResource(VertexBuffer vertices)
{
var res = IntPtr.Zero;
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsD3D9RegisterResource(&res, vertices.NativePointer, 0));
return(res);
}
//[/GLdescription]
//[LockPositions]
void LockPos(Del f)
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsResourceSetMapFlags(_resources[0],
(uint)CUDAInterop.CUgraphicsMapResourceFlags_enum.CU_GRAPHICS_MAP_RESOURCE_FLAGS_READ_ONLY));
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsResourceSetMapFlags(_resources[1],
(uint)CUDAInterop.CUgraphicsMapResourceFlags_enum.CU_GRAPHICS_MAP_RESOURCE_FLAGS_WRITE_DISCARD));
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsMapResourcesEx(2u, _resources, IntPtr.Zero));
var bytes = IntPtr.Zero;
var handle0 = IntPtr.Zero;
var handle1 = IntPtr.Zero;
unsafe
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsResourceGetMappedPointer(&handle0, &bytes,
_resources[0]));
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsResourceGetMappedPointer(&handle1, &bytes,
_resources[1]));
}
var pos0 = new deviceptr <float4>(handle0);
var pos1 = new deviceptr <float4>(handle1);
try
{
f(pos0, pos1);
}
finally
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsUnmapResourcesEx(2u, _resources, IntPtr.Zero));
}
}
unsafe static Tuple <CUDADevice, IntPtr> Generate(D3D9Device d3d9Device)
{
var cuContext = IntPtr.Zero;
var cuDevice = -1;
CUDAInterop.cuSafeCall(CUDAInterop.cuD3D9CtxCreate(&cuContext, &cuDevice, 0u, d3d9Device.NativePointer));
return(new Tuple <CUDADevice, IntPtr>(CUDADevice.DeviceDict[cuDevice], cuContext));
}
//[/startSimWindow]
//[createGLContextGenerator]
unsafe Tuple <Device, IntPtr> Generate()
{
var cuContext = IntPtr.Zero;
var cuDevice = Device.Default;
CUDAInterop.cuSafeCall(CUDAInterop.cuGLCtxCreate(&cuContext, 0u, Device.Default.ID));
return(new Tuple <Device, IntPtr>(cuDevice, cuContext));
}
private IntPtr GetDevicePointer()
{
IntPtr pointer, size;
unsafe
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGLMapBufferObject(&pointer, &size, _buffer));
}
return(pointer);
}
unsafe public void Update(IntPtr vbRes, float time)
{
// 1. map resource to cuda space, means lock to cuda space
var vbRes1 = vbRes;
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsMapResources(1, &vbRes1, IntPtr.Zero));
// 2. get memory pointer from mapped resource
var vbPtr = IntPtr.Zero;
var vbSize = IntPtr.Zero;
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsResourceGetMappedPointer(&vbPtr, &vbSize, vbRes1));
// 3. create device pointer, and run the kernel
var pos = new deviceptr <float4>(vbPtr);
GPULaunch(Kernel, LaunchParam, pos, time);
// 4. unmap resource, means unlock, so that DirectX can then use it again
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsUnmapResources(1u, &vbRes1, IntPtr.Zero));
}
//[overrideFuctions]
protected override void Dispose(bool disposing)
{
foreach (var resource in _resources)
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsUnregisterResource(resource));
}
foreach (var buffer in _buffers)
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGLUnregisterBufferObject(buffer));
}
if (_buffers.Length > 0)
{
GL.DeleteBuffers(_buffers.Length, _buffers);
}
if (disposing)
{
_vel.Dispose();
_disposeSimulators();
_worker.Dispose();
}
base.Dispose(disposing);
}
static void UnregisterVerticesResource(IntPtr res)
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsUnregisterResource(res));
}
//[/LockPositions]
public SimWindow() : base(800, 600, GraphicsMode.Default, "Gravitational n-body simulation")
{
_numBodies = 256 * 64;
const float clusterScale = 1.0f;
const float velocityScale = 1.0f;
_deltaTime = 0.001f;
_softeningSquared = 0.00125f;
_damping = 0.9995f;
//[CreateWorker]
_worker = Worker.CreateByFunc(Generate);
//[/CreateWorker]
_stopwatch = Stopwatch.StartNew();
_fpsCalcLag = 128;
_frameCounter = 0;
//[CreateSimulatros]
_simulators = new Queue <ISimulator>();
var target = GPUModuleTarget.Worker(_worker);
var simulatorGpuDynamicBlockSizeModule = new GpuDynamicSimulatorModule(target); // need dispose
var simulatorGpuDynamicBlockSize64 = simulatorGpuDynamicBlockSizeModule.Create(64);
var simulatorGpuDynamicBlockSize128 = simulatorGpuDynamicBlockSizeModule.Create(128);
var simulatorGpuDynamicBlockSize256 = simulatorGpuDynamicBlockSizeModule.Create(256);
var simulatorGpuDynamicBlockSize512 = simulatorGpuDynamicBlockSizeModule.Create(512);
var simulatorGpuStaticBlockSizeModule64 = new GpuStaticSimulatorModule64(target); // need dispose
var simulatorGpuStaticBlockSizeModule128 = new GpuStaticSimulatorModule128(target); // need dispose
var simulatorGpuStaticBlockSizeModule256 = new GpuStaticSimulatorModule256(target); // need dispose
var simulatorGpuStaticBlockSizeModule512 = new GpuStaticSimulatorModule512(target); // need dispose
// First, enquene one simulator which is 256 blocksize so we can compare with C code for performance.
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule256);
// Enqueue several dynamic block size simulators.
_simulators.Enqueue(simulatorGpuDynamicBlockSize64);
_simulators.Enqueue(simulatorGpuDynamicBlockSize128);
_simulators.Enqueue(simulatorGpuDynamicBlockSize256);
_simulators.Enqueue(simulatorGpuDynamicBlockSize512);
// Enqueue several static block size simulators.
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule64);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule128);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule256);
_simulators.Enqueue(simulatorGpuStaticBlockSizeModule512);
// We do not enqueue any cpu simulator as it is much too slow.
//_simulators.Enqueue(new CpuSimulator(_worker, _numBodies));
_disposeSimulators = () =>
{
simulatorGpuDynamicBlockSizeModule.Dispose();
simulatorGpuStaticBlockSizeModule64.Dispose();
simulatorGpuStaticBlockSizeModule128.Dispose();
simulatorGpuStaticBlockSizeModule256.Dispose();
simulatorGpuStaticBlockSizeModule512.Dispose();
};
_simulator = _simulators.Dequeue();
//[/CreateSimulatros]
//[CreateBuffers]
_buffers = new uint[2];
for (var i = 0; i < _buffers.Length; i++)
{
_buffers[i] = 0;
}
GL.GenBuffers(_buffers.Length, _buffers);
foreach (var buffer in _buffers)
{
GL.BindBuffer(BufferTarget.ArrayBuffer, buffer);
GL.BufferData(BufferTarget.ArrayBuffer,
(IntPtr)(Microsoft.FSharp.Core.Operators.SizeOf <float4>() * _numBodies),
IntPtr.Zero, BufferUsageHint.DynamicDraw);
var size = 0;
unsafe
{
GL.GetBufferParameter(BufferTarget.ArrayBuffer, BufferParameterName.BufferSize, &size);
}
if (size != Microsoft.FSharp.Core.Operators.SizeOf <float4>() * _numBodies)
{
throw new Exception("Pixel Buffer Object allocation failed!");
}
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
CUDAInterop.cuSafeCall(CUDAInterop.cuGLRegisterBufferObject(buffer));
}
_resources = new IntPtr[_buffers.Length];
for (var i = 0; i < _buffers.Length; i++)
{
var res = IntPtr.Zero;
unsafe
{
CUDAInterop.cuSafeCall(CUDAInterop.cuGraphicsGLRegisterBuffer(&res, _buffers[i], 0u));
}
_resources[i] = res;
}
//[/CreateBuffers]
//[FinalizeGL]
_vel = _worker.Malloc <float4>(_numBodies);
float4[] hpos, hvel;
BodyInitializer.Initialize(new BodyInitializer3(), clusterScale, velocityScale, _numBodies,
out hpos, out hvel);
_worker.Scatter(hvel, _vel.Ptr, Microsoft.FSharp.Core.FSharpOption <int> .None,
Microsoft.FSharp.Core.FSharpOption <int> .None);
LockPos(
(pos0, pos1) =>
_worker.Scatter(hpos, pos1, Microsoft.FSharp.Core.FSharpOption <int> .None,
Microsoft.FSharp.Core.FSharpOption <int> .None));
Help();
Description();
//[/FinalizeGL]
}