Messages in this thread | | | Subject | Re: sched_clock - microblaze | From | "Steven J. Magnani" <> | Date | Thu, 15 Apr 2010 10:06:10 -0500 |
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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 | }
Steve
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