Date: Sun, 12 Sep 2010 09:20:06 GMT From: Bruce Cran <bruce@cran.org.uk> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?) Message-ID: <201009120920.o8C9K6cc057412@freefall.freebsd.org>
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The following reply was made to PR kern/140361; it has been noted by GNATS. From: Bruce Cran <bruce@cran.org.uk> To: bug-followup@FreeBSD.org, freebsd@soulrebel.in-berlin.de Cc: Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?) Date: Sun, 12 Sep 2010 09:59:39 +0100 Hannes, It looks like powerd is doing its job: the line "dev.cpu.0.freq: 800" shows that your CPU is running at 800MHz which is far below its maximum. By checking the value of dev.cpu.0.freq every so often you should see it reduce when the system is idle and increase when doing CPU-intensive work like running a build etc. The cx_usage lines (e.g. dev.cpu.0.cx_usage: 100.00% last 500us) are just reporting the amount of time the CPU was in a certain power state. Since your CPU doesn't support C2 and C3 all the time is spent in C1 - hence the "100%". That's normal, and would only be less than 100% if you had C2 or C3 and you'd set hw.acpi.cpu.cx_lowest. I don't think this is a bug in FreeBSD if you can confirm that the dev.cpu.0.freq value is changing. If so, I'd like to close this PR. -- Bruce Cran
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