AMD K8 digital temperature sensor

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Hi Rudolf,

> > Attached is a zip file containing the results of the k8temp driver on
> > my machine. It compiles and installs with no problems. The temperature
> > readings do not compare to what the w83627ehf reports. In the zip file
> > is comp_temp.gif which plots the results. It seems the digital
> > temperature sensors are located nearer the surface of the chip, or
> > perhaps are isolated thermally somehow, since they respond much faster
> > to a change in the load average.
>
> Yes they should be somewhere in the core imho.

It looks like there are four sensors then?

> > I did not test whether the
> > temperatures respond differently to a load applied to just one CPU.
> > Also, I do not know why the w83627ehf reports two temperatures from
> > the athlon 64 x2. It may be the processor has two analog temperature
> > pins.
>
> Yes it has two analog pins.
>
> > However, the temperatures are always within 1 degree C of each
> > other.
>
> I think thats because of the load balancing.

I could test that, I don't think it's load balancing, but I don't have
any data to back it up.

> Many thanks for the test. Now we know:
>
> 1) it works on single core
> 2) it works on dualcore
> 3) it works on 2x CPU
> 4) it shoud work on 2x dualcore ;)
>
> Just a curios did you test with latest version :) ? (it has dword reads for temps)

I'll double-check, but I downloaded
http://assembler.cz/download/amd_digital_temp.tar.gz on Friday.

David




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