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
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