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96 Module Documentation3.18 Device ManagementFunctions• CUresult cuDeviceComputeCapability (int ∗major, int ∗minor, CUdevice dev)Returns the compute capability of the device.• CUresult cuDeviceGet (CUdevice ∗device, int ordinal)Returns a handle to a compute device.• CUresult cuDeviceGetAttribute (int ∗pi, CUdevice_attribute attrib, CUdevice dev)Returns information about the device.• CUresult cuDeviceGetCount (int ∗count)Returns the number of compute-capable devices.• CUresult cuDeviceGetName (char ∗name, int len, CUdevice dev)Returns an identifer string for the device.• CUresult cuDeviceGetProperties (CUdevprop ∗prop, CUdevice dev)Returns properties for a selected device.• CUresult cuDeviceTotalMem (unsigned int ∗bytes, CUdevice dev)Returns the total amount of memory on the device.3.18.1 Detailed DescriptionThis section describes the device management functions of the low-level CUDA driver application programming interface.3.18.2 Function Documentation3.18.2.1 CUresult cuDeviceComputeCapability (int ∗ major, int ∗ minor, CUdevice dev)Returns in ∗major and ∗minor the major and minor revision numbers that define the compute capability of thedevice dev.Parameters:major - Major revision numberminor - Minor revision numberdev - Device handleReturns:Note:CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_-ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_INVALID_DEVICENote that this function may also return error codes from previous, asynchronous launches.Generated on Wed Apr 1 16:11:42 2009 for NVIDIA CUDA Library by Doxygen
3.18 Device Management 97See also:cuDeviceGetAttribute, cuDeviceGetCount, cuDeviceGetName, cuDeviceGet, cuDeviceGetProperties, cuDevice-TotalMem3.18.2.2 CUresult cuDeviceGet (CUdevice ∗ device, int ordinal)Returns in ∗device a device handle given an ordinal in the range [0, cuDeviceGetCount()-1].Parameters:device - Returned device handleordinal - Device number to get handle forReturns:Note:CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_-ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUE, CUDA_ERROR_INVALID_DEVICESee also:Note that this function may also return error codes from previous, asynchronous launches.cuDeviceComputeCapability, cuDeviceGetAttribute, cuDeviceGetCount, cuDeviceGetName, cuDeviceGetProperties,cuDeviceTotalMem3.18.2.3 CUresult cuDeviceGetAttribute (int ∗ pi, CUdevice_attribute attrib, CUdevice dev)Returns in ∗pi the integer value of the attribute attrib on device dev. The supported attributes are:• CU_DEVICE_ATTRIBUTE_MAX_THREADS_PER_BLOCK: Maximum number of threads per block;• CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_X: Maximum x-dimension of a block;• CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_Y: Maximum y-dimension of a block;• CU_DEVICE_ATTRIBUTE_MAX_BLOCK_DIM_Z: Maximum z-dimension of a block;• CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_X: Maximum x-dimension of a grid;• CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_Y: Maximum y-dimension of a grid;• CU_DEVICE_ATTRIBUTE_MAX_GRID_DIM_Z: Maximum z-dimension of a grid;• CU_DEVICE_ATTRIBUTE_MAX_SHARED_MEMORY_PER_BLOCK: Maximum amount of shared memoryavailable to a thread block in bytes; this amount is shared by all thread blocks simultaneously resident on amultiprocessor;• CU_DEVICE_ATTRIBUTE_TOTAL_CONSTANT_MEMORY: Memory available on device for __constant_-_ variables in a CUDA C kernel in bytes;• CU_DEVICE_ATTRIBUTE_WARP_SIZE: Warp size in threads;• CU_DEVICE_ATTRIBUTE_MAX_PITCH: Maximum pitch in bytes allowed by the memory copy functionsthat involve memory regions allocated through cuMemAllocPitch();Generated on Wed Apr 1 16:11:42 2009 for NVIDIA CUDA Library by Doxygen
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NVIDIA CUDAReference ManualVersion
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