printk(KERN_ALERT "number of loops : %d\n", NR_LOOPS);
printk(KERN_ALERT "total time : %llu\n", tot_time);
//printk(KERN_ALERT "min : %llu\n", min_time);
printk(KERN_ALERT "number of loops : %d\n", NR_LOOPS);
printk(KERN_ALERT "total time : %llu\n", tot_time);
//printk(KERN_ALERT "min : %llu\n", min_time);