Gets useful information about your NVIDIA GPU with CUDA

deviceQuery.c

/*
Queries NVIDIA GPU for useful information.

Please compile with nvcc.
*/
#include <stdio.h> 

int main() {
  int nDevices;

  cudaGetDeviceCount(&nDevices);
  for (int i = 0; i < nDevices; i++) {
    cudaDeviceProp prop;
    size_t free, total;
    
    cudaGetDeviceProperties(&prop, i);
    cudaMemGetInfo(&free, &total);
    
    printf("Device Number: %d\n", i);
    printf("  Device name: %s\n", prop.name);
    printf("  Memory Clock Rate (KHz): %d\n", prop.memoryClockRate);
    printf("  Memory Bus Width (bits): %d\n",
           prop.memoryBusWidth);
    printf("  Peak Memory Bandwidth (GB/s): %f\n",
           2.0*prop.memoryClockRate*(prop.memoryBusWidth/8)/1.0e6);
    printf("  Total global memory (GB): %f\n",
           (float)prop.totalGlobalMem/1000000000.);
    printf("  Free memory (GB): %f\n", (float)free/1000000000);
    printf("  Max amount of shared memory available to a thread block (bytes): %zd\n",
           prop.sharedMemPerBlock);
    printf("  Max. threads per block: %d\n",
           prop.maxThreadsPerBlock);
  }
}