reducing power usage of Fedora - how you can help!

Dave Jones davej at redhat.com
Wed Aug 15 21:54:27 UTC 2007


On Tue, Aug 14, 2007 at 04:31:35PM +0200, dragoran wrote:
 > On 8/14/07, Arjan van de Ven <arjan at infradead.org> wrote:
 > >
 > >
 > > On Tue, 2007-08-14 at 10:39 +0200, dragoran wrote:
 > > > On my laptop (core2duo based) S06cpuspeed causes 100 wakeups/sec .
 > > > Seems like its already noted here:
 > > > http://linuxpowertop.org/known.php#ondemand
 > > > "Intel fixed this and the patches to the kernel to effectively remove
 > > > this timer are included in Linus' tree as of 2.6.22-rc1." I am running
 > > > 2.6.22.1-41.fc7 which should already have this changes but it seems the
 > > > problem isn't solved yet.
 > >
 > > the problem is solved; the reporting is not. 2.6.23-rc also reports the
 > > timers as "deferred" so that powertop can skip them (and version 1.8
 > > will do just that).
 > 
 > 
 > ok
 > 
 > If you see many wakups from this then you have even more other ones..
 > > since ondemand wakeups only happen now if something else wakes the cpu
 > > up anyway.
 > 
 > 
 > I am on x86_64 (non tickless yet) so that explains it.

In rawhide it's tickless as of yesterday.

	Dave

-- 
http://www.codemonkey.org.uk




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