From: arjan@linux.intel.com (Arjan van de Ven)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH v3 5/6] sched: pack the idle load balance
Date: Tue, 23 Apr 2013 08:30:58 -0700 [thread overview]
Message-ID: <5176A932.5050506@linux.intel.com> (raw)
In-Reply-To: <5175F09E.1000304@intel.com>
On 4/22/2013 7:23 PM, Alex Shi wrote:
> Thanks you, Preeti and Vincent to talk the power aware scheduler for
> details! believe this open discussion is helpful to conduct a a more
> comprehensive solution. :)
>
>> Hi Preeti,
>>
>> I have had a look at Alex patches but i have some concerns with his patches
>> -There no notion of power domain which is quite important when we speak
>> about power saving IMHO. Packing tasks has got an interest if the idle
>> CPUs can reach a useful low power state independently from busy CPUs.
>> Architectures have different low power state capabilities which must be
>> taken into account. In addition, you can have system which have CPUs
>> with better power efficiency and this kind of system are not taken into
>> account.
>
> I agree with you on this point. and like what's you done to add new flag
> in sched domain.
For x86 we should not be setting such flag then; we don't have a way for some cpu packages to
go to an extra deep power state if they're completely idle.
(this afaik is true for both Intel and AMD)
next prev parent reply other threads:[~2013-04-23 15:30 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-22 12:25 [RFC PATCH v3 0/6] sched: packing small tasks Vincent Guittot
2013-03-22 12:25 ` [RFC PATCH v3 1/6] Revert "sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking" Vincent Guittot
2013-03-22 12:25 ` [RFC PATCH v3 2/6] sched: add a new SD_SHARE_POWERDOMAIN flag for sched_domain Vincent Guittot
2013-03-22 12:25 ` [RFC PATCH v3 3/6] sched: pack small tasks Vincent Guittot
2013-03-26 12:26 ` Peter Zijlstra
2013-03-27 10:21 ` Preeti U Murthy
2013-03-27 11:00 ` Vincent Guittot
2013-04-26 10:30 ` Peter Zijlstra
2013-04-26 11:34 ` Vincent Guittot
2013-04-26 10:18 ` Peter Zijlstra
2013-04-26 10:32 ` Preeti U Murthy
2013-03-26 12:37 ` Peter Zijlstra
2013-03-26 13:00 ` Vincent Guittot
2013-03-27 4:33 ` Preeti U Murthy
2013-03-27 4:48 ` Alex Shi
2013-03-27 8:51 ` Peter Zijlstra
2013-03-26 12:46 ` Peter Zijlstra
2013-03-26 13:53 ` Vincent Guittot
2013-03-26 15:29 ` Arjan van de Ven
2013-03-27 8:46 ` Peter Zijlstra
2013-03-27 8:54 ` Vincent Guittot
2013-03-27 9:00 ` Peter Zijlstra
2013-03-27 11:18 ` Catalin Marinas
2013-03-27 14:13 ` Peter Zijlstra
2013-03-27 16:36 ` Catalin Marinas
2013-03-27 17:18 ` Nicolas Pitre
2013-03-27 17:37 ` Catalin Marinas
2013-03-27 17:20 ` Vincent Guittot
2013-03-27 18:01 ` Catalin Marinas
2013-03-27 15:37 ` Nicolas Pitre
2013-03-22 12:25 ` [RFC PATCH v3 4/6] sched: secure access to other CPU statistics Vincent Guittot
2013-03-26 12:50 ` Peter Zijlstra
2013-03-26 13:06 ` Vincent Guittot
2013-03-22 12:25 ` [RFC PATCH v3 5/6] sched: pack the idle load balance Vincent Guittot
2013-03-26 12:52 ` Peter Zijlstra
2013-03-26 14:03 ` Vincent Guittot
2013-03-26 14:42 ` Peter Zijlstra
2013-03-26 15:55 ` Vincent Guittot
2013-03-27 4:56 ` Alex Shi
2013-03-27 8:05 ` Vincent Guittot
2013-03-27 8:47 ` Alex Shi
2013-03-27 10:30 ` Vincent Guittot
2013-03-27 13:32 ` Alex Shi
2013-03-27 8:49 ` Peter Zijlstra
2013-04-05 11:08 ` Vincent Guittot
2013-04-22 5:45 ` Preeti U Murthy
[not found] ` <CAKfTPtCCCifC=c+xjjnAH_HSqkR80PiQoddQKXPHuZwZawbvcA@mail.gmail.com>
2013-04-23 2:23 ` Alex Shi
2013-04-23 4:57 ` Preeti U Murthy
2013-04-23 15:30 ` Arjan van de Ven [this message]
2013-04-26 10:54 ` Peter Zijlstra
2013-04-23 4:36 ` Preeti U Murthy
2013-03-22 12:25 ` [RFC PATCH v3 6/6] ARM: sched: clear SD_SHARE_POWERDOMAIN Vincent Guittot
2013-03-23 11:55 ` [RFC PATCH v3 0/6] sched: packing small tasks Preeti U Murthy
2013-03-25 9:58 ` Vincent Guittot
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