RE: Celeron J3160 with enabled Turbo mode stays at 480MHz(lowestsetting) forever and can not lower frequency without Tuebo mode

I don't think you need something accurate.

We don't know whether it is implemented through ACPI or similar to the old turbo jumper on the MB, which increased the clock rate and sometimes the voltage ( required to maintain stability when increasing the clock rate). We don't know how your MB manufacturer implemented this.

My guess is it's probably through ACPI but you don't know until you have some rough measurements.

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Sent using a tiny phone keyboard.
Apologies for any typos and autocorrect.
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Cy Schubert
<Cy.Schubert_at_cschubert.com> or <cy_at_freebsd.org>
The need of the many outweighs the greed of the few.
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-----Original Message-----
From: Lev Serebryakov
Sent: 05/09/2018 06:46
To: Cy Schubert; Eric van Gyzen
Cc: FreeBSD Current; freebsd-hackers_at_freebsd.org
Subject: Re: Celeron J3160 with enabled Turbo mode stays at 480MHz(lowestsetting) forever and can not lower frequency without Tuebo mode

On 05.09.2018 15:53, Cy Schubert wrote:

>> 1601 is not the actual frequency.  That is just how it is reported.  It 
>> is almost certainly running much higher than 1601.
> 
> We don't know this until we can independently verify it. Do you mind 
> running some benchmarks with and without turbo mode?
 What could be adequate benchmarks for this? Something likje "openssl
speed aes128-cbc" or I need more specific one?

-- 
// Lev Serebryakov