cuda编程笔记2（打印显卡性能算力）

打印显卡性能算力

#include <iostream>
#include <memory>
#include <cuda_runtime.h>
#include <cuda.h>
#include "drvapi_error_string.h"

/* CUDA error check macro */
#define MY_CUDA_CHECK(res, text)                                        \
  if ((res) != CUDA_SUCCESS) {                                          \
    fprintf(stderr, "%s failed: res = %d->%s\n", (text), (res), getCudaDrvErrorString((res))); \
    exit(1);                                                            \
  }

int main()
{
   
   
	/* initialize CUDA */
	CUresult res;
	res = cuInit(0);
	MY_CUDA_CHECK(res, "cuInit()");

	/* check GPU is setted or not */
	int device_num;
	res = cuDeviceGetCount(&device_num);
	MY_CUDA_CHECK(res, "cuDeviceGetCount()");

	if (device_num == 0) {
   
           // no GPU is detected
		fprintf(stderr, "no CUDA capable GPU is detected...\n");
		exit(1);
	}

	printf("%d GPUs are detected\n\n", device_num);

	for (int i = 0; i < device_num; i++)
	{
   
   
		/* get device handle of GPU No.i */
		CUdevice dev;
		res = cuDeviceGet(&am