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    SubjectRe: [PATCH 3/4] sched: introduce synchronized idle injection
    On Wed, Nov 18, 2015 at 06:52:33AM -0800, Jacob Pan wrote:
    > 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.

    Okay. But it does mean that the defeault idle period is 5 ticks (50ms @
    HZ=100) and not 5 ms.


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