Re: High pitched noise from laptop: processor.c in linux 2.6

[Albert Cahalan]

Alan Cox writes:
> On Sad, 2004-10-16 at 20:52, Lee Revell wrote:
>> [Pavel Machek]

>>> What benefits? HZ=1000 takes 1W more on my system.
>>
>> Better timer resolution?
>
> And heavily reduced accuracy on a lot of laptops
> where 1000Hz is enough to make the clock slide
> every time the battery state is queried or an SMM
> event triggers.

How low is low enough for nearly all of these laptops?
Some decent choices:

wrongness_%   HZ_diff   PIT_#   HZ     actual_HZ
-0.00083809  -0.003051   3278   364   363.996949  
-0.00016762  -0.000483   4143   288   287.999517
-0.00016762  -0.000724   2762   432   431.999276
-0.00016762  -0.001448   1381   864   863.998552
+0.00008381  +0.000304   3287   363   363.000304  
+0.00008381  +0.000435   2299   519   519.000435  
+0.00008381  +0.000525   1903   627   627.000525  


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