From: Arjan van de Ven <arjan@linux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Alex Shi <alex.shi@intel.com>,
Suresh Siddha <suresh.b.siddha@intel.com>,
vincent.guittot@linaro.org, svaidy@linux.vnet.ibm.com,
Ingo Molnar <mingo@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Turner <pjt@google.com>
Subject: Re: [discussion]sched: a rough proposal to enable power saving in scheduler
Date: Wed, 15 Aug 2012 10:59:41 -0700 [thread overview]
Message-ID: <502BE38D.9030405@linux.intel.com> (raw)
In-Reply-To: <1345043096.31459.106.camel@twins>
On 8/15/2012 8:04 AM, Peter Zijlstra wrote:
> This all sounds far too complicated.. we're talking about simple
> spreading and packing balancers without deep arch knowledge and knobs,
> we couldn't possibly evaluate anything like that.
>
> I was really more thinking of something useful for the laptops out
> there, when they pull the power cord it makes sense to try and keep CPUs
> asleep until the one that's awake is saturated.
as long as you don't do that on machines with an Intel CPU.. since that'd be
the worst case behavior for tasks that run for more than 100 usec.
(e.g. not interrupts, but almost everything else)
next prev parent reply other threads:[~2012-08-15 17:59 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-13 12:21 [discussion]sched: a rough proposal to enable power saving in scheduler Alex Shi
2012-08-14 7:35 ` Alex Shi
2012-08-15 8:23 ` Peter Zijlstra
2012-08-15 11:05 ` Peter Zijlstra
2012-08-15 13:15 ` Borislav Petkov
2012-08-15 14:43 ` Peter Zijlstra
2012-08-16 3:22 ` Alex Shi
2012-08-16 3:09 ` Alex Shi
2012-08-15 13:45 ` Arjan van de Ven
2012-08-15 14:39 ` Peter Zijlstra
2012-08-15 14:43 ` Arjan van de Ven
2012-08-15 15:04 ` Peter Zijlstra
2012-08-15 17:59 ` Arjan van de Ven [this message]
2012-08-20 8:06 ` Ingo Molnar
2012-08-20 8:26 ` Peter Zijlstra
2012-08-20 13:26 ` Arjan van de Ven
2012-08-20 18:16 ` Matthew Garrett
2012-08-21 9:42 ` Ingo Molnar
2012-08-21 11:39 ` Matthew Garrett
2012-08-21 15:19 ` Ingo Molnar
2012-08-21 15:21 ` Arjan van de Ven
2012-08-21 15:28 ` Matthew Garrett
2012-08-21 15:59 ` Ingo Molnar
2012-08-21 16:13 ` Matthew Garrett
2012-08-21 18:23 ` Ingo Molnar
2012-08-21 18:34 ` Matthew Garrett
2012-08-22 9:10 ` Ingo Molnar
2012-08-22 11:35 ` Matthew Garrett
2012-08-23 8:19 ` Alex Shi
2012-08-21 18:52 ` Alan Cox
2012-08-22 9:03 ` Ingo Molnar
2012-08-22 11:00 ` Alan Cox
2012-08-22 11:33 ` Ingo Molnar
2012-08-22 12:58 ` Alan Cox
2012-08-21 16:02 ` Alan Cox
2012-08-22 5:41 ` Mike Galbraith
2012-08-22 13:02 ` Arjan van de Ven
2012-08-22 13:09 ` Mike Galbraith
2012-08-22 13:21 ` Matthew Garrett
2012-08-22 13:23 ` Arjan van de Ven
2012-08-16 1:14 ` Rik van Riel
2012-08-16 1:17 ` Arjan van de Ven
2012-08-16 1:21 ` Arjan van de Ven
2012-08-15 14:19 ` Arjan van de Ven
2012-08-15 14:44 ` Peter Zijlstra
2012-08-15 14:47 ` Thomas Gleixner
2012-08-15 16:23 ` Matthew Garrett
2012-08-15 16:34 ` Matthew Garrett
2012-08-15 18:02 ` Arjan van de Ven
2012-08-17 8:59 ` Paul Turner
2012-08-16 3:07 ` Alex Shi
2012-08-16 6:53 ` preeti
2012-08-16 9:58 ` Alex Shi
2012-08-16 12:45 ` Shilimkar, Santosh
2012-08-16 14:01 ` Arjan van de Ven
2012-08-16 18:45 ` Rik van Riel
2012-08-16 19:20 ` Arjan van de Ven
2012-08-17 1:29 ` Alex Shi
2012-08-17 18:41 ` Matthew Garrett
2012-08-17 18:44 ` Arjan van de Ven
2012-08-17 18:47 ` Matthew Garrett
2012-08-17 19:45 ` Chris Friesen
2012-08-17 19:50 ` Matthew Garrett
2012-08-17 20:16 ` Chris Friesen
2012-08-18 14:33 ` Luming Yu
2012-08-18 14:52 ` Arjan van de Ven
2012-08-16 14:31 ` Morten Rasmussen
2012-08-19 10:12 ` Juri Lelli
2012-08-17 8:43 ` Paul Turner
2012-08-20 15:55 ` Vincent Guittot
2012-08-20 15:36 ` Vincent Guittot
2012-08-21 0:58 ` Alex Shi
2012-08-21 11:05 ` Vincent Guittot
2012-08-15 14:24 ` Rakib Mullick
2012-08-15 14:55 ` Peter Zijlstra
2012-08-15 22:58 ` Rakib Mullick
2012-08-16 5:26 ` Alex Shi
2012-08-16 4:57 ` Alex Shi
2012-08-16 8:05 ` Rakib Mullick
2012-08-15 16:19 ` Matthew Garrett
2012-08-16 5:03 ` Alex Shi
2012-08-16 5:31 ` Matthew Garrett
2012-08-16 5:39 ` Alex Shi
2012-08-16 5:45 ` Matthew Garrett
2012-08-16 13:57 ` Arjan van de Ven
2012-08-20 15:47 ` Christoph Lameter
2012-08-20 15:52 ` Matthew Garrett
2012-08-20 19:22 ` Christoph Lameter
2012-08-20 15:47 ` Vincent Guittot
2012-08-21 1:05 ` Alex Shi
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