Re: [PATCH 3/4] sched: introduce synchronized idle injection

Jacob Pan
2015-11-18T14:52:37Z

On Wed, 18 Nov 2015 14:04:41 +0000
Morten Rasmussen <morten.rasmussen@arm.com> wrote:

> Then I'm confused :-/
>
> I see the hrtimers, but the actual idle duration appears to be in
> ticks rather than ms and then converted later.
>
> +/* Duration of idle time in ticks of each injection period
> */ +unsigned int sysctl_sched_cfs_idle_inject_duration = 5UL;
>
> ...and futher down we have:
>
> + duration_msec =
> jiffies_to_msecs(sysctl_sched_cfs_idle_inject_duration);
I used hrtimers but still round around tick boundaries of ktime.
It is more reliable than jiffies in terms of getting timely updates.

Jacob