Ubuntu下的CUDA编程（六）——原子操…

test03.cu文件中的代码：

1 #include <stdio.h>

  2 //#include <cuda.h>

  3 #include "cutil.h"

  4 //#include "device_functions.h"

  5 #include "sm_12_atomic_functions.h"

  6 #define SIZE 100 * 1024 * 1024

  7 

  8 void generateRandomCharArray(unsigned char *, int );

  9 __global__ void histo_kernel(unsigned char *, unsigned int *, int);

 10 

 11 int main()

 12 {

 13         unsigned char *buffer = (unsigned char *)malloc(SIZE * sizeof(char));

 14         generateRandomCharArray(buffer, SIZE);

 15         cudaEvent_t start, stop;

 16         CUDA_SAFE_CALL(cudaEventCreate( &start));

 17         CUDA_SAFE_CALL(cudaEventCreate( &stop));

 18         CUDA_SAFE_CALL(cudaEventRecord(start, 0));

 19         unsigned char *dev_buffer;

 20         unsigned int *dev_histo;

 21         CUDA_SAFE_CALL(cudaMalloc((void **)&dev_buffer, SIZE * sizeof(char)));