*prop the properties of device
dev. The cudaDeviceProp structure is defined as:
- name is an ASCII string identifying the device;
- totalGlobalMem is the total amount of global memory available on the device in bytes;
- sharedMemPerBlock is the maximum amount of shared memory available to a thread block in bytes; this amount is shared by all thread blocks simultaneously resident on a multiprocessor;
- regsPerBlock is the maximum number of 32-bit registers available to a thread block; this number is shared by all thread blocks simultaneously resident on a multiprocessor;
- warpSize is the warp size in threads;
- memPitch is the maximum pitch in bytes allowed by the memory copy functions that involve memory regions allocated through cudaMallocPitch();
- maxThreadsPerBlock is the maximum number of threads per block;
- maxThreadsDim contains the maximum size of each dimension of a block;
- maxGridSize contains the maximum size of each dimension of a grid;
- clockRate is the clock frequency in kilohertz;
- totalConstMem is the total amount of constant memory available on the device in bytes;
- major, minor are the major and minor revision numbers defining the device's compute capability;
- textureAlignment is the alignment requirement; texture base addresses that are aligned to textureAlignment bytes do not need an offset applied to texture fetches;
- deviceOverlap is 1 if the device can concurrently copy memory between host and device while executing a kernel, or 0 if not;
- multiProcessorCount is the number of multiprocessors on the device;
- kernelExecTimeoutEnabled is 1 if there is a run time limit for kernels executed on the device, or 0 if not.
- integrated is 1 if the device is an integrated (motherboard) GPU and 0 if it is a discrete (card) component.
- canMapHostMemory is 1 if the device can map host memory into the CUDA address space for use with cudaHostAlloc()/cudaHostGetDevicePointer(), or 0 if not;
- computeMode is the compute mode that the device is currently in. Available modes are as follows:
- cudaComputeModeDefault: Default mode - Device is not restricted and multiple threads can use cudaSetDevice() with this device.
- cudaComputeModeExclusive: Compute-exclusive mode - Only one thread will be able to use cudaSetDevice() with this device.
- cudaComputeModeProhibited: Compute-prohibited mode - No threads can use cudaSetDevice() with this device. Any errors from calling cudaSetDevice() with an exclusive (and occupied) or prohibited device will only show up after a non-device management runtime function is called. At that time, cudaErrorNoDevice will be returned.
- concurrentKernels is 1 if the device supports executing multiple kernels within the same context simultaneously, or 0 if not. It is not guaranteed that multiple kernels will be resident on the device concurrently so this feature should not be relied upon for correctness;
- ECCEnabled is 1 if the device has ECC support turned on, or 0 if not.
- pciBusID is the PCI bus identifier of the device.
- pciDeviceID is the PCI device (sometimes called slot) identifier of the device.
- tccDriver is 1 if the device is using a TCC driver or 0 if not.
|prop ||- Properties for the specified device |
|device ||- Device number to get properties for|
- cudaSuccess, cudaErrorInvalidDevice
- See also:
- cudaGetDeviceCount, cudaGetDevice, cudaSetDevice, cudaChooseDevice