> I am trying to measure the timings of some kernel routines. I examined
> the value of 'jiffies' for that. But many routines (almost all, including
> the major ones like fork, exit and exec) return before a jiffie expires,
> which is understandable. (because 1 jiffie is 10ms). Therefore i am unable
> to get the exact timings.
>
> Can someone tell me how to measure the timings, inside the kernel, which
> are less than 1 jiffie (in microseconds). I am running linux-2.2.9 kernel.
try get_cycles(), rdtscl(), rdtscll().
-- mingo
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