Date: Thu, 25 Mar 2010 08:00:32 +0000 From: Bruce Cran <bruce@cran.org.uk> To: freebsd-bugs@freebsd.org, Hannes <freebsd@soulrebel.in-berlin.de> Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?) Message-ID: <201003250800.32056.bruce@cran.org.uk> In-Reply-To: <201003241030.o2OAU4BL035883@freefall.freebsd.org> References: <201003241030.o2OAU4BL035883@freefall.freebsd.org>
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On Wednesday 24 March 2010 10:30:04 Hannes wrote: > The following reply was made to PR kern/140361; it has been noted by GNATS. > > From: Hannes <freebsd@soulrebel.in-berlin.de> > To: bug-followup@freebsd.org > Cc: > Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII > (acpi?) Date: Wed, 24 Mar 2010 10:27:34 +0000 > > *ping* > > Is there anything I can do to help solve this issue? > (still there on a current RELENG_8) I don't think powerd will change the Cx level by default, but it should change the frequency as reported by dev.cpu.X.freq where X is the CPU number. You should be able to have the Cx levels change by setting dev.cpu.X.cx_lowest to something other than C1, but I think you need to keep CPU 0 at C1 otherwise the system will stop working properly (timings will change). See http://wiki.freebsd.org/TuningPowerConsumption for more details. -- Bruce Cran
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