On Wed, Jan 23, 2013 at 1:36 AM, sandeep kumar
<coolsandyfor...@gmail.com> wrote:
> Dear Anish, Mulyadi,
>
> this is how i read jiffies.
>
> unsigned long start_time, end_time;
> start_time = jiffies;
> free_area(***);
> end_time = jiffies;
> printk("%ld", end_time-start_time);
>
> I onserved jiffies getting incremented at different place, thoughand where exactly do you put that code? Theoritically, it is possible that you put such code in interrupt disabled code path, thus you see no jiffies increment. Another possibility is that code (retrieving jiffies for both start_time and end_time) ends faster than 1/HZ second, thus jiffies hasn't incremented yet. -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
