GSoC2007: cnst-sensors.2007-09-13.patch

[Kevin Oberman]

> Date: Mon, 01 Oct 2007 19:34:56 +0200
> From: mato <gamato at users.sf.net>
> 
> Kevin Oberman wrote:
> >> From: martinko <gamato at users.sf.net>
> >> Date: Tue, 25 Sep 2007 20:35:44 +0200
> >> Sender: owner-freebsd-current at freebsd.org
> >>
> >> Chuck Swiger wrote:
> >>     
> >>> The threshold temperature varies depending on the exact part, but is 
> >>> generally around 65 Celsius-- and is hot enough that you don't really 
> >>> want to encounter it in normal operation, as it's a sign that cooling is 
> >>> not adequate for the system to continue to operate safely at full 
> >>> speed.  Most of the Intel CPUs also include a second thermal circuit 
> >>> called THERMTRIP which fires around 95 Celsius which will shut the CPU 
> >>> down entirely to prevent a catastrophic failure.
> >>>
> >>>       
> >> I've got Pentium-M at 2GHz and when fully loaded it heats up to 79 
> >> Celsius.  Could it be OK or do I have a faulty laptop ?
> >>     
> >
> > My Pentium-M 2GHz system will get well above 80C when doing big builds
> > and this is well below the defined PSV (94.5C) and CRT (99C)
> > levels. These things can run very hot and be perfectly happy.
> >
> > OTOH, it might be time to clean the heatsink in the machine. That can
> > hurt heat transfer as a machine gets older.
> >
> > FWIW, the spec on the Pentium-M 2GHZ system is 105C, so CRT at 99 looks
> > right.
> >   
> 
> Mine says:
> 
> hw.acpi.thermal.tz0._PSV: 105.0C
> hw.acpi.thermal.tz0._CRT: 110.0C
> 
> This is Asus W1N laptop.

I'm not about to start checking spec sheets for people. They are all
on-line. I assume that the ASUS W1N is not in the same processor family
as the Pentium-M 735, but I have no idea what it is. I don't even know
if it is Intel, AMD or VIA. 

Looks like this one might require Kevlar pants if you put it on your
lap. Ouch! Of course, the external temperature of the unit will never
approach these temperatures.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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