Re: [RFC][PATCH 8/9] sched: power: Add initial frequency scalingsupport to power scheduler

[Arjan van de Ven]

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@xxxxxxx>
> CC: Ingo Molnar <mingo@xxxxxxxxxx>
> CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> CC: Catalin Marinas <catalin.marinas@xxxxxxx>
> ---
>   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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