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From: Thomas Backman <serenity@exscape.org>
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To: Michal Varga <varga.michal@gmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: Systems running hot?
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On Dec 20, 2009, at 8:39 AM, Michal Varga wrote:

> Sorry to hijack the thread, but I'm curious - is anybody running
> powerd/throttling on a Phenom-based CPU?
>=20
> I see cpufreq attaching normally on /AMD Athlon(tm) 64 X2 Dual Core
> Processor 3600+ (2004.56-MHz 686-class CPU)/:
>=20
> But not so on much newer /AMD Phenom(tm) 8450 Triple-Core Processor
> (2109.74-MHz 686-class CPU)/:
>=20
> # kldload -v cpufreq
> Loaded cpufreq, id=3D23
>=20
>> =46rom the offending Phenom:
> # sysctl dev.cpu.0.
> dev.cpu.0.%desc: ACPI CPU
> dev.cpu.0.%driver: cpu
> dev.cpu.0.%location: handle=3D\_PR_.C000
> dev.cpu.0.%pnpinfo: _HID=3Dnone _UID=3D0
> dev.cpu.0.%parent: acpi0
> dev.cpu.0.cx_supported: C1/0
> dev.cpu.0.cx_lowest: C1
> dev.cpu.0.cx_usage: 100.00% last 500us
> dev.cpu.0.temperature: 27.5C
>=20
> This is from latest 7.2. Were there any changes in 8/9-CURRENT to
> bring some love to Phenoms too?

I have little to no experience with power saving in *nix, but have you =
made sure the BIOS settings support throttling etc.?

Regards,
Thomas=