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Date:      Wed, 26 Aug 2020 06:27:17 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 248901] processor critical temperature check only executed if temperature is first queried using sysctl
Message-ID:  <bug-248901-227-hY12qXBZGl@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-248901-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-248901-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248901

--- Comment #2 from Martin Birgmeier <d8zNeCFG@aon.at> ---
Actually the behavior is that it suffices to *once* execute the sysctl; aft=
er
that, the critical temperature warnings are printed every few seconds.

Are you sure about the "poor cooling"? This is a laptop, and I am regularly
cleaning the cooling ducts & servicing the fan, even partially disassembling
the system. My impression is that this is "by design", and that the process=
or
simply throttles when reaching about 97 =C2=B0C - although this is not visi=
ble when
looking at dev.cpu.0.freq which stays at a constant 2 GHz. But it never goes
beyond that temperature (and the system has never been unstable because of =
it).
Also, even if I try to use an external fan to add some cooling from underne=
ath,
the temperature stays in the range of 90 to 97 =C2=B0C as long as all four =
cores are
active.

-- Martin

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