Not sure, if it will help you or not but did you look at ftrace?
Thanks,
--Pradeep
On Wed, Apr 8, 2009 at 3:29 PM, Sukanto Ghosh
<sukanto.cse.iitb@xxxxxxxxx> wrote:
> Hi,
>
> I want to log the following activities with timestamps - *as precisely
> as possible* :
> i. enqueuing of a process
> ii. dequeuing of a process
> iii. a process starts executing on cpu
> iv. a process is preempted/yeilds the cpu
>
> What is the best (precise, efficient and easy) way of doing so ?
>
>
>
> Currently I am doing the following:
>
> I am using jprobes for enqueue_entity and dequeue_entity functions, to
> log the events.
> For logging context switches I have used kprobes to put a printk
> statement in schedule() function of kernel/sched.c before the
> statement that increments the context switch counter of the runqueue.
>
>
>
> --
> Regards,
> Sukanto Ghosh
>
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>
--
Pradeep
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