speedstep / cpu frequency control on 6-stable?
doconnor at gsoft.com.au
Mon Aug 21 23:07:42 UTC 2006
On Tuesday 22 August 2006 06:08, Torfinn Ingolfsen wrote:
> What ids the current way to control cpu speed (and power consumption)
> in FreeBSD 6-stable?
> Before, est was one way, but all traces of est has disappeared
> from /etc/defaults/rc.conf and thereabouts.
> I find something about powerd and power_profile, but they don't seem to
> work, and I can't seem to find out what variables / configuration items
> to set. 'man cpufreq' isn't much help in that regard either.
Loading cpufreq should give you sysctl's which control CPU frequency. powerd
uses these to adjust frequency based on load.
I have this in rc.conf
powerd_flags="-i 70 -r 30 -a adaptive -b adaptive -n adaptive -p 200"
And in dmesg..
cpu0: <ACPI CPU> on acpi0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
p4tcc0: <CPU Frequency Thermal Control> on cpu0
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.freq_levels: 1400/-1 1225/-1 1200/-1 1050/-1 1000/-1 875/-1 800/-1
700/-1 600/-1 525/-1 450/-1 375/-1 300/-1 225/-1 150/-1 75/-1
(This is a Pentium-M 1.4Ghz)
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
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