How to Get Properties of your CUDA Device?

If you’re a going into High Performance Computing (HPC), there’s a very rare chance to miss the name CUDA. I’m just getting into that. nVdia GeForce 8 Series + hardware supports CUDA programming. You might be interested in various parameters of CUDA. From the version to number of multi processors, size of shared memory, global memory etc… How you can get the details of your CUDA hardware? Interestingly you can have multiple GPU in your machine. So how can we enumerate the properties of your CUDA hardware? Here’s the sample CUDA snippet for you. Save in your disk and compile it using nVidia CUDA compiler (nvcc.exe coming with CUDA Toolkit)

Device properties of CUDA Hardware
#include <stdio.h>
#include <assert.h>
#include <cuda.h>

void DisplayProperties( cudaDeviceProp* pDeviceProp )
{
	if( !pDeviceProp )
		return;

	printf( "\nDevice Name \t - %s ", pDeviceProp->name );
	printf( "\n**************************************");
	printf( "\nTotal Global Memory\t\t -%d KB", pDeviceProp->totalGlobalMem/1024 );
	printf( "\nShared memory available per block \t - %d KB", pDeviceProp->sharedMemPerBlock/1024 );
	printf( "\nNumber of registers per thread block \t - %d", pDeviceProp->regsPerBlock );
	printf( "\nWarp size in threads \t - %d", pDeviceProp->warpSize );
	printf( "\nMemory Pitch \t - %d bytes", pDeviceProp->memPitch );
	printf( "\nMaximum threads per block \t - %d", pDeviceProp->maxThreadsPerBlock );
	printf( "\nMaximum Thread Dimension (block) \t - %d %d %d", pDeviceProp->maxThreadsDim[0], pDeviceProp->maxThreadsDim[1], pDeviceProp->maxThreadsDim[2] );
	printf( "\nMaximum Thread Dimension (grid) \t - %d %d %d", pDeviceProp->maxGridSize[0], pDeviceProp->maxGridSize[1], pDeviceProp->maxGridSize[2] );
	printf( "\nTotal constant memory \t - %d bytes", pDeviceProp->totalConstMem );
	printf( "\nCUDA ver \t - %d.%d", pDeviceProp->major, pDeviceProp->minor );
	printf( "\nClock rate \t - %d KHz", pDeviceProp->clockRate );
	printf( "\nTexture Alignment \t - %d bytes", pDeviceProp->textureAlignment );
	printf( "\nDevice Overlap \t - %s", pDeviceProp-> deviceOverlap?"Allowed":"Not Allowed" );
	printf( "\nNumber of Multi processors \t - %d", pDeviceProp->multiProcessorCount );
}

int main(void)
{
	cudaDeviceProp deviceProp;
	int nDevCount = 0;

	cudaGetDeviceCount( &nDevCount );
	printf( "Total Device found: %d", nDevCount );
	for (int nDeviceIdx = 0; nDeviceIdx < nDevCount; ++nDeviceIdx )
	{
		memset( &deviceProp, 0, sizeof(deviceProp));
		if( cudaSuccess == cudaGetDeviceProperties(&deviceProp, nDeviceIdx))
			DisplayProperties( &deviceProp );
		else
			printf( "\n%s", cudaGetErrorString(cudaGetLastError()));
	}
}