Re: [lm-sensors] [PATCH 0/2] hwmon: Update coretemp to current Intel processors

From: Carsten Emde
Date: Tue May 18 2010 - 03:20:48 EST


On 05/18/2010 08:45 AM, Dmitry Gromov wrote:
On Tue, May 18, 2010 at 01:07, Wan, Huaxu<huaxu.wan@xxxxxxxxx> wrote:
The TjMax of N270 is 90C, according the official documents [1][2].
[1] http://ark.intel.com/Product.aspx?id=36331&processor=N270&spec-codes=SLB73
[2] http://download.intel.com/design/processor/datashts/319977.pdf
Thank you, this is exactly why I'm asking. I think, "guessing" values here
can be dangerous - who knows what critical apps they will relied upon.
Yes, of course. I never wanted to use a guessed and not documented
value. I only wanted the temperature reading to be plausible.

And 90C seems to be good for N200 series of Atom CPUs only - I could not
find TjMax value published for N330 Dual Core (quite popular one). Intel
only published Tcase for it:
http://ark.intel.com/Product.aspx?id=35641
So, if for N270 Tcase = TjMax = 90C, then, I'd suggest to use Tcase = 85.2C
for N330 TjMax value.
They have the same CPU model ID:

# grep model /proc/cpuinfo
model : 28
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz

# grep model /proc/cpuinfo
model : 28
model name : Intel(R) Atom(TM) CPU 330 @ 1.60GHz

I would like to propose to use the patch as it is. It's the best
version we ever had.

Carsten.
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