From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Arjan van de Ven <arjan@linux.intel.com>
Cc: preeti <preeti@linux.vnet.ibm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
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: Fri, 17 Aug 2012 19:41:00 +0100 [thread overview]
Message-ID: <20120817184100.GA13369@srcf.ucam.org> (raw)
In-Reply-To: <502CFD35.5000801@linux.intel.com>
On Thu, Aug 16, 2012 at 07:01:25AM -0700, Arjan van de Ven wrote:
> > *Power policy*:
> >
> > So how is power policy different? As Peter says,'pack more than spread
> > more'.
>
> this is ... a dubiously general statement.
>
> for good power, at least on Intel cpus, you want to spread. Parallelism is efficient.
Is this really true? In a two-socket system I'd have thought the benefit
of keeping socket 1 in package C3 outweighed the cost of keeping socket
0 awake for slightly longer.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2012-08-17 18:41 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
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 [this message]
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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