Linux下测试SSD固态硬盘写入速度

 1 gettimeofday(&start, NULL);
 2 int fd = open("test1.dat", O_RDWR|O_CREAT);
 3 if (fd < 0){
 4     printf("open error!\n");
 5     return 0;
 6 }
 7 lseek(fd, 0, SEEK_SET);
 8 write(fd, pData, DATA_LEN);
 9 close(fd);
10 gettimeofday(&end, NULL);
11 // 显示占用时间, 单位是us
12 diff = 1000000 * (end.tv_sec - start.tv_sec) + (end.tv_usec start.tv_usec);
13 printf("the data length is %d\n Byte", DATA_LEN);
14 printf("the difference is %ld us\n", diff);