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 
12 // 显示占用时间, 单位是us
13     diff = 1000000 * (end.tv_sec - start.tv_sec) + (end.tv_usec - start.tv_usec);
14 
15     printf("the data length is %d\n Byte", DATA_LEN);
16     printf("the difference is %ld us\n", diff);