Cuda硬件基础

#include <stdio.h>
#include <cuda_runtime.h>

/*
 * Fetches basic information on the first device in the current CUDA platform,
 * including number of SMs, bytes of constant memory, bytes of shared memory per
 * block, etc.
 */
 
#define CUDA_CHECK(call)                                                  \
    do {                                                                  \
        cudaError_t err = call;                                           \
        if (err != cudaSuccess) {                                         \
            fprintf(stderr, "CUDA error %s:%d: %s\n", __FILE__, __LINE__, \
                    cudaGetErrorString(err));                             \
            exit(1);                                                      \
        }                                                                 \
    } while (0)


int main(int argc, char *argv[])
{
    int iDev = 0;
    cudaDeviceProp iProp;
    CUDA_CHECK(cudaGetDeviceProperties(&iProp, iDev));

    printf("Device %d: %s\n", iDev, iProp.name);
    printf("  Number of multiprocessors:                     %d\n",
           iProp.multiProcessorCount);
    printf("  Total amount of constant memory:               %4.2f KB\n",
           iProp.totalConstMem / 1024.0);
    printf("  Total amount of shared memory per block:       %4.2f KB\n",
           iProp.sharedMemPerBlock / 1024.0);
    printf("  Total number of registers available per block: %d\n",
           iProp.regsPerBlock);
    printf("  Warp size:                                     %d\n",
           iProp.warpSize);
    printf("  Maximum number of threads per block:           %d\n",
           iProp.maxThreadsPerBlock);
    printf("  Maximum number of threads per multiprocessor:  %d\n",
           iProp.maxThreadsPerMultiProcessor);
    printf("  Maximum number of warps per multiprocessor:    %d\n",
           iProp.maxThreadsPerMultiProcessor / 32);
    return EXIT_SUCCESS;
}