cuda.bindings._v2.driver.device_get_p2p_attribute#

cuda.bindings._v2.driver.device_get_p2p_attribute( int attrib, int src_device, int dst_device, ) → int#

Queries attributes of the link between two devices.

Returns in *value the value of the requested attribute attrib of the link between src_device and dst_device. The supported attributes are:.

CU_DEVICE_P2P_ATTRIBUTE_PERFORMANCE_RANK: A relative value indicating the performance of the link between two devices.
CU_DEVICE_P2P_ATTRIBUTE_ACCESS_SUPPORTED P2P: 1 if P2P Access is enable.
CU_DEVICE_P2P_ATTRIBUTE_NATIVE_ATOMIC_SUPPORTED: 1 if all CUDA-valid atomic operations over the link are supported.
CU_DEVICE_P2P_ATTRIBUTE_CUDA_ARRAY_ACCESS_SUPPORTED: 1 if cudaArray can be accessed over the link.
CU_DEVICE_P2P_ATTRIBUTE_ONLY_PARTIAL_NATIVE_ATOMIC_SUPPORTED: 1 if some CUDA-valid atomic operations over the link are supported. Information about specific operations can be retrieved with cuDeviceGetP2PAtomicCapabilities.

Returns CUDA_ERROR_INVALID_DEVICE if src_device or dst_device are not valid or if they represent the same device. Returns CUDA_ERROR_INVALID_VALUE if attrib is not valid or if value is a null pointer.

Parameters:

attrib (DeviceP2PAttribute) – The requested attribute of the link between src_device and dst_device.
src_device (int) – The source device of the target link.
dst_device (int) – The destination device of the target link.

Returns:

Returned value of the requested attribute.

Return type:

int