Date: Mon, 27 May 2013 14:13:36 +0200 From: Michio Honda <micchie@sfc.wide.ad.jp> To: Eric van Gyzen <eric@vangyzen.net> Cc: current@freebsd.org Subject: Re: Changing CPU frequency for Xeon processors Message-ID: <A56A8368-775C-4FFF-A3BF-E0B8D1438E5F@sfc.wide.ad.jp> In-Reply-To: <5197DF7C.1040305@vangyzen.net> References: <1280DF1A-1DAC-43F1-A62D-B4DC9378FF88@sfc.wide.ad.jp> <5197DF7C.1040305@vangyzen.net>
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Thanks Eric, in case of HP Proliant DL120 G7 server, BIOS's configuration needs to be "OS Control Mode". The similar would apply to other systems. Cheers, - Michio On May 18, 2013, at 10:07 PM, Eric van Gyzen wrote: > On 05/18/2013 10:09 AM, Michio Honda wrote: >> Hi, >> >> I'm trying to experiment with downclocking CPU. >> My environment is 10.0-CURRENT amd64. >> >> However, my CPU (Xeon E31220) seems not to be supported by the cpufreq module, thus dmesg shows: >> est0: <Enhanced SpeedStep Frequency Control> on cpu0 >> est: CPU supports Enhanced Speedstep, but is not recognized. >> >> As a result, although sysctl -a shows the list of available frequency values (dev.cpu.0.freq_levels: 3093/-1 2706/-1 2319/-1 1933/-1 1546/-1 1159/-1 773/-1 386/-1 >> dev.), I cannot set the value (the error message is "sysctl: dev.cpu.0.freq=773: Device not configured"). >> >> Do you have any idea to change CPU frequency for this CPU? > > In my experience, the "not recognized" message indicates that the feature is not enabled in the BIOS. > > Eric > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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