Hi,
I would like to take some time measurements for some functions from my kernel module. In a first attempt, I tried to use current_kernel_time, but this often returns the same value before and after the call I want to measure (even, when I use the tv_nsec field.).
ts1=current_kernel_time;
function();
ts2=current_kernel_time;
So now I'm using rdtscll instead of current_kernel_time and that's fine.. but I would like to convert that cycle units to time units. I don't know how to do it... Maybe with loops_per_jiffies and do_div but I don't know how to combine them. What is a jiffie (4 ms as wikipedia said in
2.6 kernel series) and how can I use them to convert the rdtscll return value to time units?
Any help would be appreciate,
Thanks
