Date: Sat, 19 May 2007 02:01:39 +0100 From: Thomas Hurst <tom.hurst@clara.net> To: freebsd-amd64@freebsd.org Subject: Re: cpufreq/powerd workaround? Message-ID: <20070519010139.GA30118@voi.aagh.net> In-Reply-To: <20070518183549.GA3524@laverenz.de> References: <20070518183549.GA3524@laverenz.de>
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* Uwe Laverenz (uwe@laverenz.de) wrote:
> I just learned the hard way, that the use of cpufreq and powerd
> freezes AMD64/SMP systems almost immediately. I found some old PRs
> that describe this behaviour: amd64/87305, amd64/87689. The age of
> these PRs make me think this issue is not going to be solved in the
> near future. :)
>
> Is there a workaround for this or another way of saving energy?
>
> The system I use is a Tyan S2875 board with 2 Opteron 250.
Aside from the occasional warning in dmesg from a failure in setting the
frequency, cpufreq works for me on a Tyan S2895 with 2 Opteron 275's,
and for the past year or so with 2 Opteron 246's:
dev.cpu.0.freq: 1000
dev.cpu.0.freq_levels: 2200/95000 2000/90300 1800/75900 1000/36100
dev.powernow.0.%desc: Cool`n'Quiet K8
dev.powernow.0.%driver: powernow
dev.powernow.0.%parent: cpu0
root 93137 0.0 0.0 3616 1128 ?? Ss 22Apr07 10:15.66 /usr/sbin/powerd
Are you running an up-to-date BIOS? Any ACPI throttling stuff
configured as well?
--
Thomas 'Freaky' Hurst
http://hur.st/
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