[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: reducing power usage of Fedora - how you can help!



On Tue, Aug 14, 2007 at 10:46:44AM -0400, Chuck Ebbert wrote:
 > On 08/14/2007 04:39 AM, 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.
 > > doing the suggested
 > > "
 > > cd /sys/devices/system/cpu/cpu0/cpufreq
 > > 
 > > cat ondemand/sampling_rate_max > ondemand/sampling_rate
 > > "
 > > does fix the wakeups (S06cpuspeed) is no longer on the list .. but it
 > > takes some seconds for the cpu to change pstate running glxgears 2-3
 > > seconds later cpu goes to 2.17ghz closing it I have to wait other 2-3
 > > second to be back at 1ghz
 > > without the "fix" it does this almost immediately.
 > > any idea how this can be fixed?
 > > 
 > 
 > What governor is it using? If it's "ondemand" I don't see why cpuspeed
 > should even be running at all.

S06cpuspeed is what did the 'modprobe ondemand'.
Why current->name wasn't "modprobe" I've no idea, but I've seen this
myself, and cpuspeed isn't actually running.

	Dave

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


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]