/// <summary>
/// Constructs a new OpenCL accelerator.
/// </summary>
/// <param name="context">The ILGPU context.</param>
/// <param name="acceleratorId">The accelerator id.</param>
public CLAccelerator(Context context, CLAcceleratorId acceleratorId)
: base(context, AcceleratorType.OpenCL)
{
if (acceleratorId == null)
{
throw new ArgumentNullException(nameof(acceleratorId));
}
PlatformId = acceleratorId.PlatformId;
DeviceId = acceleratorId.DeviceId;
PlatformName = CLAPI.GetPlatformInfo(
PlatformId,
CLPlatformInfoType.CL_PLATFORM_NAME);
VendorName = CLAPI.GetPlatformInfo(
PlatformId,
CLPlatformInfoType.CL_PLATFORM_VENDOR);
// Create new context
CLException.ThrowIfFailed(
CLAPI.CreateContext(DeviceId, out contextPtr));
// Resolve device info
Name = CLAPI.GetDeviceInfo(
DeviceId,
CLDeviceInfoType.CL_DEVICE_NAME);
MemorySize = CLAPI.GetDeviceInfo <long>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_GLOBAL_MEM_SIZE);
DeviceType = (CLDeviceType)CLAPI.GetDeviceInfo <long>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_TYPE);
// Max grid size
int workItemDimensions = IntrinsicMath.Max(CLAPI.GetDeviceInfo <int>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_WORK_ITEM_DIMENSIONS), 3);
var workItemSizes = new IntPtr[workItemDimensions];
CLAPI.GetDeviceInfo(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_WORK_ITEM_SIZES,
workItemSizes);
MaxGridSize = new Index3(
workItemSizes[0].ToInt32(),
workItemSizes[1].ToInt32(),
workItemSizes[2].ToInt32());
// Resolve max threads per group
MaxNumThreadsPerGroup = CLAPI.GetDeviceInfo <IntPtr>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_WORK_GROUP_SIZE).ToInt32();
// Resolve max shared memory per block
MaxSharedMemoryPerGroup = (int)IntrinsicMath.Min(
CLAPI.GetDeviceInfo <long>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_LOCAL_MEM_SIZE),
int.MaxValue);
// Resolve total constant memory
MaxConstantMemory = (int)CLAPI.GetDeviceInfo <long>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_PARAMETER_SIZE);
// Resolve clock rate
ClockRate = CLAPI.GetDeviceInfo <int>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_CLOCK_FREQUENCY);
// Resolve number of multiprocessors
NumMultiprocessors = CLAPI.GetDeviceInfo <int>(
DeviceId,
CLDeviceInfoType.CL_DEVICE_MAX_COMPUTE_UNITS);
// Result max number of threads per multiprocessor
MaxNumThreadsPerMultiprocessor = MaxNumThreadsPerGroup;
InitVendorFeatures();
InitSubGroupSupport(acceleratorId);
Bind();
DefaultStream = CreateStreamInternal();
base.Backend = new CLBackend(Context, Backends.Backend.OSPlatform, Vendor);
}