"cool running" geode processor

igor@nospam.invalid · *nix forums addict Joined: 17 Aug 2005 Posts: 81

Hello.

An easy question, though! I have a Soekris Engineering net4801 running
OpenBSD 3.9. My goal is making that machine run as cool as possible to
avoid possible hardware damage to it. It is certainly not running very
hot:

$ sysctl hw.sensors
hw.sensors.0=nsclpcsio0, TSENS1, temp, 127.00 degC / 260.60 degF
hw.sensors.1=nsclpcsio0, TSENS2, temp, 127.00 degC / 260.60 degF
hw.sensors.2=nsclpcsio0, TNSC, temp, 56.00 degC / 132.80 degF
hw.sensors.3=nsclpcsio0, VSENS0, volts_dc, 3.01 V
hw.sensors.4=nsclpcsio0, VSENS1, volts_dc, 2.07 V
hw.sensors.5=nsclpcsio0, VSENS2, volts_dc, 2.55 V
hw.sensors.6=nsclpcsio0, VSENS3, volts_dc, 0.60 V
hw.sensors.7=nsclpcsio0, VSENS4, volts_dc, 2.54 V
hw.sensors.8=nsclpcsio0, VSENS5, volts_dc, 2.54 V
hw.sensors.9=nsclpcsio0, VSENS6, volts_dc, 0.00 V
hw.sensors.10=nsclpcsio0, VSB, volts_dc, 3.35 V
hw.sensors.11=nsclpcsio0, VDD, volts_dc, 3.35 V
hw.sensors.12=nsclpcsio0, VBAT, volts_dc, 3.01 V
hw.sensors.13=nsclpcsio0, AVDD, volts_dc, 3.33 V
hw.sensors.14=nsclpcsio0, TS1, volts_dc, 1.56 V
hw.sensors.15=nsclpcsio0, TS2, volts_dc, 1.59 V
hw.sensors.16=nsclpcsio0, TS3, volts_dc, 1.50 V

As its internal HDD (a 60GB Travelstar drive) is probably not designed
for 24/7 use, I think that it is good spinning it down when not in use:

$ tail -2 /etc/rc.local
atactl /dev/wd0c setidle 180; atactl /dev/wd0c setstandby 240
atactl /dev/wd0c writecachedisable

(writecachedisable is here to avoid filesystem corruption as this machine
has softdep enabled too... but I think that it is an off-topic on this
thread, just want to check that I did not a mistake enabling this option!)

My question is... makes it sense enabling "cool running" in apmd?

$ apm
Battery state: unknown, 0% remaining, unknown life estimate
A/C adapter state: not known
Performance state: cool running (267 MHz)

This machine has a geode processor. I haven't tried it on other
architectures but I would expect either a change in the processor
speed or a change in the hw.setperf variable---it seems that this
parameter is not supported, as it is not shown when using sysctl( Cool

.

Is cool running supported by AMD geode embedded computers?

Best regards,
Igor.

mike · *nix forums Guru Wannabe Joined: 04 Mar 2005 Posts: 233

Igor Sobrado wrote:

igor@nospam.invalid · *nix forums addict Joined: 17 Aug 2005 Posts: 81

mike <michael.no.spam.cook@wanadoo.fr> wrote:

Google