General device properties

cudaDeviceProp provides several properties that can be used to identify the device and the versions being used. It provides the name property that returns the name of the device as a string. We can also get a version of the driver and the runtime engine the device is using by querying cudaDriverGetVersion and cudaRuntimeGetVersion properties. Sometimes, if you have more than one device, you want to use the device that has more multiprocessors. The multiProcessorCount property returns the count of the number of multiprocessors on the device. The speed of the GPU in terms of clock rate can be fetched by using the clockRate property. It returns clock rate in Khz. The following code snippet shows how to use these properties from the CUDA program:

cudaDeviceProp device_Property;
cudaGetDeviceProperties(&device_Property, device);
printf("\nDevice %d: \"%s\"\n", device, device_Property.name);
cudaDriverGetVersion(&driver_Version);
cudaRuntimeGetVersion(&runtime_Version);
printf(" CUDA Driver Version / Runtime Version %d.%d / %d.%d\n", driver_Version / 1000, (driver_Version % 100) / 10, runtime_Version / 1000, (runtime_Version % 100) / 10);
printf( " Total amount of global memory: %.0f MBytes (%llu bytes)\n",
 (float)device_Property.totalGlobalMem / 1048576.0f, (unsigned long long) device_Property.totalGlobalMem);
 printf(" (%2d) Multiprocessors", device_Property.multiProcessorCount );
printf("  GPU Max Clock rate: %.0f MHz (%0.2f GHz)\n", device_Property.clockRate * 1e-3f, device_Property.clockRate * 1e-6f);