From: Pavel Machek <pavel@ucw.cz>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Norbert Preining <preining@logic.at>,
linux-kernel@vger.kernel.org,
Arjan Van De Ven <arjan@infradead.org>,
Ingo Molnar <mingo@elte.hu>, akpm <akpm@linux-foundation.org>
Subject: Re: high power consumption in recent kernels
Date: Fri, 9 Jul 2010 21:09:02 +0200 [thread overview]
Message-ID: <20100709190902.GC1669@ucw.cz> (raw)
In-Reply-To: <1278579992.1900.17.camel@laptop>
On Thu 2010-07-08 11:06:32, Peter Zijlstra wrote:
> On Wed, 2010-07-07 at 01:45 +0900, Norbert Preining wrote:
>
> > it seems that some of the (?)recent(?) changes have increased the
> > power consumption of my note book considerably.
> >
> > First of all, running powertop with normal programs started, but
> > doing nothing, I am still at 14W while I could go down to 9W before
> > (but the 9W was with dimmed display).
> >
> > In the list of top causes for wakeup I have
> > Top causes for wakeups:
> > 34.2% (185.3) [kernel scheduler] Load balancing tick
> > 23.9% (129.6) [extra timer interrupt]
> > 10.8% ( 58.6) firefox-bin
> > 9.2% ( 49.7) [iwlagn] <interrupt>
> > 7.2% ( 39.1) [kernel core] hrtimer_start (tick_sched_timer)
> > 3.9% ( 20.9) PS/2 keyboard/mouse/touchpad interrupt
> > which show one new thing to me I haven't seen before, the Loa balancing tick.
>
14W vs 9W is very significant -- is some DMA keeping system from
entering C3? rmmod usb?
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2010-07-09 19:09 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-06 16:45 high power consumption in recent kernels Norbert Preining
2010-07-08 9:06 ` Peter Zijlstra
2010-07-08 11:57 ` Arjan van de Ven
2010-07-08 11:58 ` Peter Zijlstra
2010-07-08 12:04 ` Norbert Preining
2010-07-08 12:22 ` Peter Zijlstra
2010-07-08 12:46 ` Norbert Preining
2010-07-08 13:23 ` Peter Zijlstra
2010-07-08 15:59 ` Peter Zijlstra
2010-07-08 19:06 ` Peter Zijlstra
2010-07-08 19:40 ` Mike Galbraith
2010-07-08 20:44 ` Peter Zijlstra
2010-07-09 3:08 ` Arjan van de Ven
2010-07-09 5:55 ` Mike Galbraith
2010-07-08 19:37 ` Mike Galbraith
2010-07-08 15:11 ` Arjan van de Ven
2010-07-09 19:09 ` Pavel Machek [this message]
[not found] <1283840425.26157.6486.camel@debian>
[not found] ` <20100909093140.GC29648@gamma.logic.tuwien.ac.at>
[not found] ` <EA929A9653AAE14F841771FB1DE5A1366008738EC2@rrsmsx501.amr.corp.intel.com>
[not found] ` <20100909205115.GD11053@gamma.logic.tuwien.ac.at>
[not found] ` <1284107099.402.30.camel@laptop>
2010-09-10 14:48 ` Shi, Alex
2010-09-10 14:54 ` Norbert Preining
2010-09-13 5:21 ` Alex,Shi
2010-09-17 2:09 ` Alex,Shi
2010-09-22 15:44 ` Norbert Preining
2010-09-28 10:40 ` Alex,Shi
2010-09-29 14:39 ` Norbert Preining
2010-09-29 15:48 ` Chen, Tim C
2010-09-30 0:50 ` Alex,Shi
2010-09-30 2:01 ` Norbert Preining
2010-09-30 6:59 ` Norbert Preining
2010-09-30 8:27 ` Alex,Shi
2010-09-30 12:36 ` Peter Zijlstra
2010-09-30 13:21 ` Shi, Alex
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