关于随机数生成的速度测试

int main(){
clock_t start,finish;
int *d_data;
int m = 1000;
CUDA_CALL(cudaMalloc((void **)&d_data, m*sizeof(int)));
int rand1[1000];
start = clock();

memset(rand1,0,m*sizeof(int));
for(int i=0;i<m;i++)
rand1[i] = RAND::Rand(100);

CUDA_CALL(cudaMemcpy(d_data,rand1,m*sizeof(int),cudaMemcpyHostToDevice));
finish=clock();
printf("%d--%d --- %d\n",start,finish,finish-start);

clock_t start1,finish1;
start1=clock();
size_t n = 1000;
size_t i;
curandGenerator_t gen;
float *devData;
CUDA_CALL(cudaMalloc((void **)&devData, n*sizeof(float)));
CURAND_CALL(curandCreateGenerator(&gen, CURAND_RNG_PSEUDO_DEFAULT));
CURAND_CALL(curandSetPseudoRandomGeneratorSeed(gen, 1234));
CURAND_CALL(curandGenerateUniform(gen, devData, n));

CURAND_CALL(curandDestroyGenerator(gen));

finish1=clock();
printf("%d --- %d",finish1,finish1-start1);
CUDA_CALL(cudaFree(devData));
getchar();
return 0;
}