On Mon, Mar 21, 2011 at 12:32 PM, Vimal <j.vimal@gmail.com> wrote:

Hi Mohit,

On 18 March 2011 13:07, mohit verma <mohit89mlnc@gmail.com> wrote:
> hi all,
> is it possible to write a user space code to calculate the context switch
> time of a process ? I mean , how can the user space code know about the
> working of the scheduler?
> Is there any system call API to interact with scheduler or something other
> to interact with , regarding this problem?

Do check the function tracing framework in the Linux Kernel.

Links:
* http://lwn.net/Articles/322666/
* http://lwn.net/Articles/290277/

sched_switch is the tracer you're looking for.

--
Vimal