[Powertop] 'PowerTOP --calibrate' output

[Powertop] 'PowerTOP --calibrate' output

[Amit Singh]

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Hi.
After exiting 'sudo powertop --calibrate', there are some statistics
printed like "Score = 1.7 (18069.1) Guess = 12.1 Actual = 12.3" (These
numbers are made up, I do not remember the actual values I got). I tried
looking up what these values mean but could not find it mentioned anywhere
in the User's guide. Can someone point me to a resource that has this
information? Or if you know what these mean then kindly explain it to me as
well.
Thanks!
Amit

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Re: [Powertop] 'PowerTOP --calibrate' output

[Arjan van de Ven]

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On 5/21/2017 11:36 AM, Amit Singh wrote:
> Hi.
> After exiting 'sudo powertop --calibrate', there are some statistics printed like "Score = 1.7 (18069.1) Guess = 12.1 Actual = 12.3" (These numbers are made up, I do not
> remember the actual values I got). I tried looking up what these values mean but could not find it mentioned anywhere in the User's guide. Can someone point me to a
> resource that has this information? Or if you know what these mean then kindly explain it to me as well.
> Thanks!

so powertop tries to do a least squares fit of the calibration measurements to a model it builds of your PC,
and this is basically diagnotics output that tries to print how well the least squares worked

Re: [Powertop] 'PowerTOP --calibrate' output

[Eugene Syromyatnikov]

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On Sun, May 21, 2017 at 6:36 PM, Amit Singh <amit112amit(a)gmail.com> wrote:
> Hi.
> After exiting 'sudo powertop --calibrate', there are some statistics printed
> like "Score = 1.7 (18069.1) Guess = 12.1 Actual = 12.3" (These numbers are
> made up, I do not remember the actual values I got). I tried looking up what
> these values mean but could not find it mentioned anywhere in the User's
> guide. Can someone point me to a resource that has this information? Or if
> you know what these mean then kindly explain it to me as well.

https://github.com/fenrus75/powertop/blob/master/src/parameters/parameters.cpp#L255

They are calculated in [1].

[1] https://github.com/fenrus75/powertop/blob/master/src/parameters/parameters.cpp#L182

-- 
Eugene Syromyatnikov
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