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[Mageia-discuss] Cpufreq management

+ Antoine Pitrou + solipsis at pitrou.net +
+ Tue Jan 10 16:39:06 CET 2012 +

+
+ +
On Tue, 10 Jan 2012 12:20:48 +0100
+Pierre Jarillon <jarillon at abul.org> wrote:
+> Cpufreq management is not obvious and not easy for a beginner.
+> 
+> However it is useful to save power and reduce the noise (lower speed of fans).
+> It is useful on laptops and also on desktops.
+> I use intel procs:
+> 4CPU : i5-2500K CPU @ 3.30GHz (mageia 1)
+> 2CPU :  E7300 @ 2.66GHz (mageia 1 and cauldron)
+> On both machines, the lower frequency is 1.60GHz and I have set the governor 
+> to ondemand.
+> 
+> In MCC-> services, cpufreq was enabled, but in fact was not working.
+
+You shouldn't need a permanent daemon, since this is all handled by the
+kernel.
+Also, by default the "ondemand" governor seems to be enabled, which is
+what you want (it conserves power when no demanding task is running).
+
+> A question:  Why is there cpufreq and cpufreqd? 
+
+AFAIU, cpufreqd is obsolete. The kernel is able to change power state
+depending on load without the help of an user-space daemon.
+
+Regards
+
+Antoine.
+
+
+
+ + + + +
+

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