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

Are you running powers?

Do you use c-states?

What happens if you boot in (instead of switch to) turbo mode?

---
Sent using a tiny phone keyboard.
Apologies for any typos and autocorrect.
Also, this old phone only supports top post. Apologies.

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: 04/09/2018 13:50
To: FreeBSD Current; freebsd-hackers_at_freebsd.org
Subject: Celeron J3160 with enabled Turbo mode stays at 480MHz (lowestsetting) forever and can not lower frequency without Tuebo mode

Hello FreeBSD,

  I'm installing latest 12-ALPHA4 on new MiniPC with Celeron J3160 CPU. It
 is 1.6GHz CPU with Turbo up to 2.somethingGHz.

  If I enable Turbo mode, after booting to FreeBSD it locks at 480MHz
 according to dev.cpu.0.freq, and simple "openssl" test confirms it.

  If I disable Turbo mode, after booting to FreeBSD it locks at 1600MHz even
 if powerd is running.

  It looks like some bug in interaction between cpufreq and Turbo mode of
 this CPU.

-- 
Best regards,
 Lev                          mailto:lev_at_FreeBSD.org

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