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From: Henrik Austad <henrik@austad.us>
To: Morten Rasmussen <morten.rasmussen@arm.com>
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
	peterz@infradead.org, mingo@kernel.org, rjw@rjwysocki.net,
	vincent.guittot@linaro.org, daniel.lezcano@linaro.org,
	preeti@linux.vnet.ibm.com, dietmar.eggemann@arm.com
Subject: Re: [RFC PATCH 02/16] sched: Introduce CONFIG_SCHED_ENERGY
Date: Sun, 8 Jun 2014 08:03:16 +0200	[thread overview]
Message-ID: <20140608060316.GA18179@austad.us> (raw)
In-Reply-To: <1400869003-27769-3-git-send-email-morten.rasmussen@arm.com>

On Fri, May 23, 2014 at 07:16:29PM +0100, Morten Rasmussen wrote:
> The Energy-aware scheduler implementation is guarded by
> CONFIG_SCHED_ENERGY.
> 
> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
> Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
> ---
>  arch/arm/Kconfig |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index ab438cb..bfc3a85 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig

Is this going to be duplicate for each architecture enabling this? Why
not make a kernel/Kconfig.energy and link to that from those
architectures using it?

> @@ -1926,6 +1926,11 @@ config XEN
>  	help
>  	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
>  
> +config SCHED_ENERGY
> +	bool "Energy-aware scheduling (EXPERIMENTAL)"
> +	help
> +	  Highly experimental energy aware task scheduling.
> +

how about adding *slightly* more info here? :) (yes, yes, I know it's an RFC)

"""
Highly experimental energy aware task scheduling.

This will allow the kernel to keep track of energy required for
different capacity levels for a given CPU. That way, the scheduler can
make more informed decisions as to where a newly woken task should be
placed. Heterogenous platform will benefit the most from this option.

Enabling this will add a significant overhead for a task-switch.

If unsure, say N here.
"""

>  endmenu
>  
>  menu "Boot options"
> -- 
> 1.7.9.5
> 
> 
> --
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-- 
Henrik Austad

  reply	other threads:[~2014-06-08  6:08 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-23 18:16 [RFC PATCH 00/16] sched: Energy cost model for energy-aware scheduling Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 01/16] sched: Documentation for scheduler energy cost model Morten Rasmussen
2014-06-05  8:49   ` Vincent Guittot
2014-06-05 11:35     ` Morten Rasmussen
2014-06-05 15:02       ` Vincent Guittot
2014-05-23 18:16 ` [RFC PATCH 02/16] sched: Introduce CONFIG_SCHED_ENERGY Morten Rasmussen
2014-06-08  6:03   ` Henrik Austad [this message]
2014-06-09 10:20     ` Morten Rasmussen
2014-06-10  9:39       ` Peter Zijlstra
2014-06-10 10:06         ` Morten Rasmussen
2014-06-10 10:23           ` Peter Zijlstra
2014-06-10 11:17             ` Henrik Austad
2014-06-10 12:19               ` Peter Zijlstra
2014-06-10 11:24             ` Morten Rasmussen
2014-06-10 12:24               ` Peter Zijlstra
2014-06-10 14:41                 ` Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 03/16] sched: Introduce sd energy data structures Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 04/16] sched: Allocate and initialize sched energy Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 05/16] sched: Add sd energy procfs interface Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 06/16] arm: topology: Define TC2 sched energy and provide it to scheduler Morten Rasmussen
2014-05-30 12:04   ` Peter Zijlstra
2014-06-02 14:15     ` Morten Rasmussen
2014-06-03 11:41       ` Peter Zijlstra
2014-06-04 13:49         ` Morten Rasmussen
2014-06-03 11:44   ` Peter Zijlstra
2014-06-04 15:42     ` Morten Rasmussen
2014-06-04 16:16       ` Peter Zijlstra
2014-06-06 13:15         ` Morten Rasmussen
2014-06-06 13:43           ` Peter Zijlstra
2014-06-06 14:29             ` Morten Rasmussen
2014-06-12 15:05               ` Vince Weaver
2014-06-03 11:50   ` Peter Zijlstra
2014-06-04 16:02     ` Morten Rasmussen
2014-06-04 17:27       ` Peter Zijlstra
2014-06-04 21:56         ` Rafael J. Wysocki
2014-06-05  6:52           ` Peter Zijlstra
2014-06-05 15:03             ` Dirk Brandewie
2014-06-05 20:29               ` Yuyang Du
2014-06-06  8:05                 ` Peter Zijlstra
2014-06-06  0:35                   ` Yuyang Du
2014-06-06 10:50                     ` Peter Zijlstra
2014-06-06 12:13                       ` Ingo Molnar
2014-06-06 12:27                         ` Ingo Molnar
2014-06-06 14:11                           ` Morten Rasmussen
2014-06-07  2:33                           ` Nicolas Pitre
2014-06-09  8:27                             ` Morten Rasmussen
2014-06-09 13:22                               ` Nicolas Pitre
2014-06-11 11:02                                 ` Eduardo Valentin
2014-06-11 11:42                                   ` Morten Rasmussen
2014-06-11 11:43                                     ` Eduardo Valentin
2014-06-11 13:37                                       ` Morten Rasmussen
2014-06-07 23:53                         ` Yuyang Du
2014-06-07 23:26                       ` Yuyang Du
2014-06-09  8:59                         ` Morten Rasmussen
2014-06-09  2:15                           ` Yuyang Du
2014-06-10 10:16                         ` Peter Zijlstra
2014-06-10 17:01                           ` Nicolas Pitre
2014-06-10 18:35                           ` Yuyang Du
2014-06-06 16:27                     ` Jacob Pan
2014-06-06 13:03         ` Morten Rasmussen
2014-06-07  2:52         ` Nicolas Pitre
2014-05-23 18:16 ` [RFC PATCH 07/16] sched: Introduce system-wide sched_energy Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 08/16] sched: Introduce SD_SHARE_CAP_STATES sched_domain flag Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 09/16] sched, cpufreq: Introduce current cpu compute capacity into scheduler Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 10/16] sched, cpufreq: Current compute capacity hack for ARM TC2 Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 11/16] sched: Energy model functions Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 12/16] sched: Task wakeup tracking Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 13/16] sched: Take task wakeups into account in energy estimates Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 14/16] sched: Use energy model in select_idle_sibling Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 15/16] sched: Use energy to guide wakeup task placement Morten Rasmussen
2014-05-23 18:16 ` [RFC PATCH 16/16] sched: Disable wake_affine to broaden the scope of wakeup target cpus Morten Rasmussen

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