From: Andi Kleen <andi@firstfloor.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Arjan van de Ven <arjan@infradead.org>,
tytso@mit.edu, Peter Zijlstra <a.p.zijlstra@chello.nl>,
Florian Mickler <florian@mickler.org>, Neil Brown <neilb@suse.de>,
Brian Swetland <swetland@google.com>,
"H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
James Bottomley <James.Bottomley@suse.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linux PM <linux-pm@lists.linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Linux OMAP Mailing List <linux-omap@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Felipe Balbi <felipe.balbi@nokia.com>
Subject: Re: suspend blockers & Android integration
Date: Fri, 04 Jun 2010 12:42:26 +0200 [thread overview]
Message-ID: <8739x3xenh.fsf@basil.nowhere.org> (raw)
In-Reply-To: <alpine.LFD.2.00.1006032141060.8175@i5.linux-foundation.org> (Linus Torvalds's message of "Thu\, 3 Jun 2010 21\:46\:01 -0700 \(PDT\)")
Linus Torvalds <torvalds@linux-foundation.org> writes:
> On Thu, 3 Jun 2010, Arjan van de Ven wrote:
>>
>> And because there's then no power saving (but a performance cost), it's
>> actually a negative for battery life/total energy.
>
> Including the UP optimizations we do (ie lock prefix removal)? It's
Those only help the kernel and most workloads do not do enough kernel
execution for it to really matter, but spend most of their
time in user space.
Even if as kernel programmers we often have a different view, in most
cases most cycles are in user space :)
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2010-06-04 10:42 UTC|newest]
Thread overview: 196+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-03 19:30 suspend blockers & Android integration Ingo Molnar
2010-06-03 19:50 ` Brian Swetland
2010-06-04 7:57 ` Ingo Molnar
2010-06-04 8:29 ` Brian Swetland
2010-06-04 8:55 ` Ingo Molnar
2010-06-04 9:03 ` Pekka Enberg
2010-06-04 9:08 ` Brian Swetland
2010-06-04 9:59 ` Ingo Molnar
2010-06-04 10:09 ` Brian Swetland
2010-06-04 14:24 ` James Bottomley
2010-06-04 15:07 ` Florian Mickler
2010-06-06 8:04 ` david
2010-06-10 13:58 ` Pavel Machek
2010-06-11 4:21 ` [linux-pm] " David Brownell
2010-06-11 14:28 ` James Bottomley
2010-06-11 14:46 ` Alan Stern
2010-06-11 15:01 ` Mark Brown
2010-06-11 15:02 ` James Bottomley
2010-06-11 20:48 ` Alan Stern
2010-06-11 21:04 ` James Bottomley
2010-06-12 17:10 ` Mark Brown
2010-06-12 2:43 ` David Brownell
2010-06-11 14:42 ` Alan Stern
[not found] ` <20100603231153.GA11302@elte.hu>
2010-06-03 23:23 ` Ingo Molnar
2010-06-03 23:37 ` Linus Torvalds
2010-06-03 23:46 ` Ingo Molnar
2010-06-04 2:16 ` Linus Torvalds
2010-06-04 2:26 ` Linus Torvalds
2010-06-04 3:45 ` Arjan van de Ven
2010-06-04 4:46 ` Linus Torvalds
2010-06-04 10:42 ` Andi Kleen [this message]
2010-06-04 8:15 ` Ingo Molnar
2010-06-06 8:16 ` david
2010-06-06 8:23 ` david
2010-06-04 3:45 ` Arve Hjønnevåg
2010-06-04 6:22 ` Ingo Molnar
2010-06-04 8:11 ` Ingo Molnar
2010-06-05 20:37 ` Florian Mickler
2010-06-04 0:39 ` Ingo Molnar
2010-06-04 14:50 ` Alan Stern
2010-06-04 4:38 ` Neil Brown
2010-06-04 4:54 ` Arve Hjønnevåg
2010-06-04 7:13 ` Ingo Molnar
2010-06-04 7:37 ` Arve Hjønnevåg
2010-06-04 8:34 ` Ingo Molnar
2010-06-04 8:56 ` Arve Hjønnevåg
2010-06-04 12:06 ` Peter Zijlstra
2010-06-05 0:10 ` Arve Hjønnevåg
2010-06-05 9:54 ` Peter Zijlstra
2010-06-05 16:28 ` Arjan van de Ven
2010-06-05 21:26 ` Arve Hjønnevåg
2010-06-05 22:23 ` Arjan van de Ven
2010-06-05 22:26 ` Brian Swetland
2010-06-05 22:48 ` Arjan van de Ven
2010-06-05 23:45 ` Thomas Gleixner
2010-06-06 0:34 ` Arve Hjønnevåg
2010-06-05 22:52 ` Rafael J. Wysocki
2010-06-05 22:39 ` Arve Hjønnevåg
2010-06-05 23:34 ` Arjan van de Ven
2010-06-06 0:02 ` Arve Hjønnevåg
2010-06-06 11:18 ` Felipe Contreras
2010-06-06 11:26 ` david
2010-06-06 7:52 ` [linux-pm] " Vitaly Wool
2010-06-06 8:20 ` Brian Swetland
2010-06-06 8:32 ` Vitaly Wool
2010-06-06 9:21 ` Brian Swetland
2010-06-06 9:56 ` david
2010-06-06 11:11 ` Felipe Contreras
2010-06-06 10:00 ` Vitaly Wool
2010-06-06 10:12 ` david
2010-06-06 10:19 ` Vitaly Wool
2010-06-06 10:49 ` Florian Mickler
2010-06-06 10:57 ` Vitaly Wool
2010-06-06 11:14 ` david
2010-06-07 12:16 ` Florian Mickler
2010-06-09 1:14 ` david
2010-06-09 3:46 ` Linus Torvalds
2010-06-09 7:43 ` Felipe Contreras
2010-06-09 9:40 ` Rafael J. Wysocki
2010-06-09 22:04 ` Neil Brown
2010-06-10 8:59 ` Rafael J. Wysocki
2010-06-10 12:00 ` Neil Brown
2010-06-10 16:06 ` Rafael J. Wysocki
2010-06-10 13:57 ` Mark Brown
2010-06-10 15:46 ` Rafael J. Wysocki
2010-06-10 19:01 ` Mark Brown
2010-06-10 14:47 ` Alan Stern
2010-06-10 15:44 ` Rafael J. Wysocki
2010-06-06 10:46 ` Florian Mickler
2010-06-06 11:05 ` Alan Cox
2010-06-06 13:34 ` Matthew Garrett
2010-06-06 14:31 ` James Bottomley
2010-06-06 15:46 ` Thomas Gleixner
2010-06-06 17:08 ` James Bottomley
2010-06-06 18:04 ` Thomas Gleixner
2010-06-06 18:44 ` Brian Swetland
2010-06-06 19:26 ` Thomas Gleixner
2010-06-06 19:05 ` Christoph Hellwig
2010-06-06 19:15 ` Brian Swetland
2010-06-06 19:24 ` Christoph Hellwig
2010-06-06 19:58 ` Brian Swetland
2010-06-06 22:26 ` Thomas Gleixner
2010-06-07 8:00 ` Christoph Hellwig
2010-06-07 8:03 ` Christoph Hellwig
2010-06-07 8:16 ` Brian Swetland
2010-06-07 13:20 ` Peter Zijlstra
2010-06-07 18:40 ` David Brownell
2010-06-07 23:17 ` Linus Walleij
2010-06-07 23:37 ` Brian Swetland
2010-06-08 2:15 ` Valdis.Kletnieks
2010-06-09 12:33 ` Mark Brown
2010-07-09 19:11 ` HTC Dream drivers was " Pavel Machek
2010-06-06 13:31 ` Matthew Garrett
2010-06-06 15:26 ` Vitaly Wool
2010-06-06 15:29 ` Matthew Garrett
2010-06-06 15:47 ` Vitaly Wool
2010-06-06 16:43 ` Matthew Garrett
2010-06-06 17:21 ` Vitaly Wool
2010-06-06 17:31 ` Matthew Garrett
[not found] ` <AANLkTimCd4AUk1wBBcnX9WKvpKA6sNfs8-4Qqb5wMaNH@mail.gmail.com>
2010-06-06 17:48 ` Matthew Garrett
2010-06-06 19:01 ` Rafael J. Wysocki
2010-06-07 10:25 ` Felipe Contreras
2010-06-07 13:01 ` Florian Mickler
2010-06-07 0:01 ` Alan Stern
2010-06-07 1:07 ` [linux-pm] suspend blockers & Android integrationy Thomas Gleixner
2010-06-07 14:42 ` Alan Stern
2010-06-07 15:49 ` Thomas Gleixner
2010-06-07 15:56 ` [linux-pm] suspend blockers & Android integration Florian Mickler
2010-06-08 0:57 ` Arve Hjønnevåg
2010-06-08 1:13 ` Alan Stern
2010-06-04 9:43 ` Peter Zijlstra
2010-06-04 9:54 ` Peter Zijlstra
2010-06-04 10:03 ` Ingo Molnar
2010-06-04 10:08 ` Peter Zijlstra
2010-06-04 10:11 ` Brian Swetland
2010-06-04 10:11 ` Thomas Gleixner
2010-06-04 10:13 ` Peter Zijlstra
2010-06-04 23:38 ` Rafael J. Wysocki
2010-06-05 0:05 ` Thomas Gleixner
2010-06-05 0:39 ` Arve Hjønnevåg
2010-06-05 1:18 ` Matt Helsley
2010-06-05 5:35 ` Arve Hjønnevåg
2010-06-05 18:25 ` Rafael J. Wysocki
2010-06-05 22:10 ` Arve Hjønnevåg
2010-06-05 23:03 ` Rafael J. Wysocki
2010-06-06 1:03 ` Arve Hjønnevåg
2010-06-06 2:49 ` Alan Stern
2010-06-06 11:09 ` [linux-pm] " Alan Stern
2010-06-08 0:23 ` Arve Hjønnevåg
2010-06-08 1:09 ` Alan Stern
2010-06-08 1:31 ` Arve Hjønnevåg
2010-06-08 2:32 ` Alan Stern
2010-06-08 3:05 ` Arve Hjønnevåg
2010-06-08 10:19 ` Florian Mickler
2010-06-08 14:50 ` Alan Stern
2010-06-09 1:48 ` Arve Hjønnevåg
2010-06-09 15:29 ` Alan Stern
2010-06-09 23:42 ` Arve Hjønnevåg
2010-06-10 4:21 ` david
2010-06-10 4:51 ` Arve Hjønnevåg
2010-06-10 5:10 ` Neil Brown
2010-06-10 14:39 ` Alan Stern
2010-06-10 14:28 ` Alan Stern
2010-06-10 23:02 ` Arve Hjønnevåg
2010-06-11 1:44 ` Alan Stern
2010-06-11 3:16 ` Arve Hjønnevåg
2010-06-11 14:33 ` Alan Stern
2010-06-11 22:18 ` Arve Hjønnevåg
2010-06-12 15:22 ` Alan Stern
2010-06-07 23:16 ` Arve Hjønnevåg
2010-06-06 13:29 ` Rafael J. Wysocki
2010-06-05 1:33 ` Thomas Gleixner
2010-06-05 5:23 ` Arve Hjønnevåg
2010-06-05 16:47 ` Thomas Gleixner
2010-06-05 21:47 ` Arve Hjønnevåg
2010-06-05 22:11 ` Thomas Gleixner
2010-06-05 23:21 ` Arve Hjønnevåg
2010-06-05 23:39 ` Rafael J. Wysocki
2010-06-06 0:04 ` Thomas Gleixner
2010-06-06 1:16 ` Arve Hjønnevåg
2010-06-06 10:36 ` Thomas Gleixner
2010-06-06 14:43 ` Matt Helsley
2010-06-08 0:45 ` Arve Hjønnevåg
2010-06-07 23:34 ` Arve Hjønnevåg
2010-06-06 10:56 ` Thomas Gleixner
2010-06-08 0:05 ` Arve Hjønnevåg
2010-06-06 0:19 ` Thomas Gleixner
2010-06-06 1:24 ` Arve Hjønnevåg
2010-06-06 0:32 ` Thomas Gleixner
2010-06-06 1:45 ` Arve Hjønnevåg
2010-06-06 10:01 ` Thomas Gleixner
2010-06-05 22:44 ` Rafael J. Wysocki
2010-06-05 23:56 ` Arve Hjønnevåg
2010-06-06 13:55 ` Rafael J. Wysocki
2010-06-08 0:39 ` Arve Hjønnevåg
2010-06-08 9:11 ` Rafael J. Wysocki
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