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    SubjectRe: [RFC][PATCH 8/9] sched: power: Add initial frequency scaling support to power scheduler
    On 7/9/2013 8:55 AM, Morten Rasmussen wrote:
    > Extends the power scheduler capacity management algorithm to handle
    > frequency scaling and provide basic frequency/P-state selection hints
    > to the power driver.
    >
    > Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
    > CC: Ingo Molnar <mingo@kernel.org>
    > CC: Peter Zijlstra <peterz@infradead.org>
    > CC: Catalin Marinas <catalin.marinas@arm.com>
    > ---
    > kernel/sched/power.c | 33 ++++++++++++++++++++++++++++-----
    > 1 file changed, 28 insertions(+), 5 deletions(-)
    >
    > diff --git a/kernel/sched/power.c b/kernel/sched/power.c
    > index 9e44c0e..5fc32b0 100644
    > --- a/kernel/sched/power.c
    > +++ b/kernel/sched/power.c
    > @@ -21,6 +21,8 @@
    >
    > #define INTERVAL 5 /* ms */
    > #define CPU_FULL 90 /* Busy %-age - TODO: Make tunable */
    > +#define CPU_TARGET 80 /* Target busy %-age - TODO: Make tunable */
    > +#define CPU_EMPTY 5 /* Idle noise %-age - TODO: Make tunable */
    >

    to be honest, this is the policy part that really should be in the hardware specific driver
    and not in the scheduler.
    (even if said driver is sort of a "generic library" kind of thing)





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