Re: regression caused by 08f511fd41c3 ("cpufreq: Reduce cpufreq_update_util() overhead a bit")

Jisheng Zhang
2016-06-17T08:40:54Z

Dear all,

On Fri, 17 Jun 2016 16:30:23 +0800 Jisheng Zhang wrote:

> Dear all,
>
> I found one regression: In an idle system, wakeups/s (reported by powertop)
> is increased a lot, e.g on a intel snb 4 core platform, the wakeup event
> number is increased from 8 wakeups/s to 24 wakeup/s. bisect points to
> this commit. I could send detailed bisect log if it's wanted.
>

more information maybe useful: after the commit, the top two wakeup source
are

Process [rcu_sched]

Timer tick_sched_timer

thanks