Function createSubDeviceContext

DE_APP/src/common.cpp:323–384

}

bool createSubDeviceContext(cl_context* context, cl_int numComputeUnits) //work in progress
{
    cl_int errorNumber = 0;
    cl_uint numberOfPlatforms = 0;
    cl_platform_id firstPlatformID = 0;

    /* Retrieve a single platform ID. */
    if (!checkSuccess(clGetPlatformIDs(1, &firstPlatformID, &numberOfPlatforms)))
    {
        cerr << "Retrieving OpenCL platforms failed. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }

    if (numberOfPlatforms <= 0)
    {
        cerr << "No OpenCL platforms found. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }

    /* Get a context with a GPU device from the platform found above. */
    cl_context_properties contextProperties [] = {CL_CONTEXT_PLATFORM, (cl_context_properties)firstPlatformID, 0};

    cl_uint numDevices;
    cl_device_id device_id;

	// Get Device ID from selected platform:
	clGetDeviceIDs( firstPlatformID, CL_DEVICE_TYPE_ACCELERATOR, 1, &device_id, &numDevices);

	// Create two sub-device properties: Partition By Counts
	/* Examples:
		cl_device_partition_property props[] = { CL_DEVICE_PARTITION_BY_COUNTS, 4, CL_DEVICE_PARTITION_BY_COUNTS_LIST_END, 0};
		cl_device_partition_property props[] = { CL_DEVICE_PARTITION_EQUALLY, 8, 0};
	*/
	#ifdef CL_VERSION_1_1
	//cl_device_partition_property_ext pprops[] = { CL_DEVICE_PARTITION_BY_COUNTS_EXT, 4, 4, CL_PROPERTIES_LIST_END_EXT, 0};
	#else
	//cl_device_partition_property pprops[] = { CL_DEVICE_PARTITION_BY_COUNTS, 4, CL_DEVICE_PARTITION_BY_COUNTS_LIST_END, 0};
	#endif /* CL_VERSION_1_1 */



	cl_device_id subdevice_id;
	// Create the sub-devices:
	#ifdef CL_VERSION_1_1
	//if (!checkSuccess(clCreateSubDevicesEXT(device_id, pprops, 1, &subdevice_id, &numDevices)))
	#else
	//if (!checkSuccess(clCreateSubDevices(device_id, pprops, 1, &subdevice_id, &numDevices)))
	#endif /* CL_VERSION_1_1 */
    {
        cerr << "Creating an OpenCL Sub Device failed. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;
    }
	// Create the context:
	*context = clCreateContext(contextProperties, 1, &subdevice_id, NULL, NULL, &errorNumber);
    if (!checkSuccess(errorNumber))
    {
        cerr << "Creating an OpenCL context failed. " << __FILE__ << ":"<< __LINE__ << endl;
        return false;