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clGetDeviceInfo - Get information about an OpenCL device. cl_int clGetDeviceInfo(cl_device_id device, cl_device_info param_name, size_t param_value_size, void *param_value, size_t *param_value_size_ret);
device May be a device returned by clGetDeviceIDs(3clc) or a sub-device created by clCreateSubDevices(3clc). If device is a sub-device, the specific information for the sub-device will be returned. The information that can be queried using clGetDeviceInfo is specified in the table below. param_value A pointer to memory location where appropriate values for a given param_name as specified in the table below will be returned. If param_value is NULL, it is ignored. param_value_size Specifies the size in bytes of memory pointed to by param_value. This size in bytes must be ≥ size of return type specified in the table below. param_value_size_ret Returns the actual size in bytes of data being queried by param_value. If param_value_size_ret is NULL, it is ignored. param_name An enumeration constant that identifies the device information being queried. It can be one of the values as specified in the table below.
CL_DEVICE_PROFILE: The platform profile returns the profile that is implemented by the OpenCL framework. If the platform profile returned is FULL_PROFILE, the OpenCL framework will support devices that are FULL_PROFILE and may also support devices that are EMBEDDED_PROFILE. The compiler must be available for all devices i.e. CL_DEVICE_COMPILER_AVAILABLE is CL_TRUE. If the platform profile returned is EMBEDDED_PROFILE, then devices that are only EMBEDDED_PROFILE are supported. The device queries described the table above should return the same information for a root-level device i.e. a device returned by clGetDeviceIDs(3clc) and any sub-devices created from this device except for the following queries: · CL_DEVICE_GLOBAL_MEM_CACHE_SIZE.RE · CL_DEVICE_BUILT_IN_KERNELS.RE · CL_DEVICE_PARENT_DEVICE.RE · CL_DEVICE_PARTITION_TYPE.RE · CL_DEVICE_REFERENCE_COUNT.RE
clGetDeviceInfo returns CL_SUCCESS if the function is executed successfully. Otherwise, it returns the following: · CL_INVALID_DEVICE if device is not valid. · CL_INVALID_VALUE if param_name is not one of the supported values or if size in bytes specified by param_value_size is less than size of return type as shown in the table above and param_value is not a NULL value or if param_name is a value that is available as an extension and the corresponding extension is not supported by the device. · CL_OUT_OF_RESOURCES if there is a failure to allocate resources required by the OpenCL implementation on the device. · CL_OUT_OF_HOST_MEMORY if there is a failure to allocate resources required by the OpenCL implementation on the host.
clGetDeviceIDs(3clc), cl_khr_fp64(3clc), constant(3clc), clCreateCommandQueue(3clc), clRetainCommandQueue(3clc), clEnqueueNDRangeKernel(3clc)
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1. OpenCL Specification page 37, section 4.2 - Querying Devices