RE: stable: commit "cpuidle: menu: Avoid discarding useful information" causes regressions

[Doug Smythies]

On 2025.10.14 04:50 Rafael J. Wysocki wrote:
> On Wed, Oct 15, 2025 at 5:41 AM Doug Smythies <dsmythies@xxxxxxxxx> wrote:
>>
>> On 2025.10.14 18:30 Sergey Senozhatsky wrote:
>>> On (25/10/14 17:54), Rafael J. Wysocki wrote:
>>>> Sergey, can you please run the workload under turbostat on the base
>>>> 6.1.y and on 6.1.y with the problematic commit reverted and send the
>>>> turbostat output from both runs (note: turbostat needs to be run as
>>>> root)?
>>>
>>> Please find attached the turbostat logs for both cases.
>>
>> The turbostat data suggests that power limit throttling is involved.
>
> Why do you think so?

I observed sustained processor package powers over the PL1 limit of 6 watts,
combined with increased busy % while at the same time power and CPU frequency going down.
I admit the time constant of 28 seconds only seems to be exceeded once.

Since I seem to be unable to function without making a graph, some are attached,
including Idle state usage, which might be useful for your other email.
(The graphs are poorly labelled and such.)

... Doug

Attachment: idle-states.png
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Attachment: mhz.png
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Attachment: pkg-pwr.png
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Attachment: temp.png
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