Re: [RFCv3 PATCH 38/48] sched: Infrastructure to query if load balancing is energy-aware

[Peter Zijlstra]

On Wed, Feb 04, 2015 at 06:31:15PM +0000, Morten Rasmussen wrote:
> From: Dietmar Eggemann <dietmar.eggemann@xxxxxxx>
> 
> 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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/