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SubjectRe: [RFCv3 PATCH 38/48] sched: Infrastructure to query if load balancing is energy-aware
On Wed, Feb 04, 2015 at 06:31:15PM +0000, Morten Rasmussen wrote:
> From: Dietmar Eggemann <dietmar.eggemann@arm.com>
>
> Energy-aware load balancing should only happen if the ENERGY_AWARE feature
> is turned on and the sched domain on which the load balancing is performed
> on contains energy data.
> There is also a need during a load balance action to be able to query if we
> should continue to load balance energy-aware or if we reached the tipping
> point which forces us to fall back to the conventional load balancing
> functionality.

> @@ -7348,6 +7349,7 @@ static int load_balance(int this_cpu, struct rq *this_rq,
> .cpus = cpus,
> .fbq_type = all,
> .tasks = LIST_HEAD_INIT(env.tasks),
> + .use_ea = (energy_aware() && sd->groups->sge) ? true : false,

fwiw, no tipping point in that logic.


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