Re: sched_clock - microblaze

Michal Simek
2010-04-15T16:21:31Z

Steven J. Magnani wrote:
> Michal,
>
> On Thu, 2010-04-15 at 16:55 +0200, Michal Simek wrote:
>
>> Is unimplemented sched_clock the reason why ftrace not show fine grain time?
>>
>> Or is there any other thing which is wrong?
>>
>
> I think that's it. On my platform we have a free-running 1 MHz counter
> so I implemented a platform sched_clock for that, and I get nice ftrace
> times.
>
> 0) + 65.000 us | finish_task_switch();
> 0) | lock_sock_nested() {
> 0) + 52.000 us | local_bh_disable();
> 0) + 53.000 us | local_bh_enable();
> 0) ! 264.000 us | }

I don't understand why I should add any "new" free running counter
because we have one free running counter which do it (clocksource timer
- timer1). Or am I missing something?

Thanks for sending your code.
Michal

--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663