Re: Core temperature

Pietro Cerutti <gahr@gahr.ch> writes:
> Could you please try to explain these results?
>
> % sysctl hw.coretemp.tjmax hw.coretemp.delta hw.acpi.thermal.tz0.temperat=
ure
> hw.coretemp.tjmax: 100
> hw.coretemp.delta: -38
> hw.acpi.thermal.tz0.temperature: 66.8C
>
> Shouldn't hw.coretemp.delta be (hw.coretemp.tjmax -
> hw.acpi.thermal.tz0.temperature)?

The value reported by hw.acpi.thermal.tz0.temperature most likely comes
from a temperature sensor mounted somewhere on the motherboard, while
hw.coretemp.delta reports the temperature inside the CPU itself.  In my
experience, Core-based CPUs run very cool under light load, so the
result does not surprise me.

here's what coretemp reports on my file server:

hw.coretemp.tjmax: 100
hw.coretemp.delta: -46

although I believe this is actually one of the CPUs that have an 85=C2=B0C
Tj(max), giving a core temperature of 39=C2=B0C and not 54=C2=B0C (the box =
has a
2.4 GHz C2D but spends most of its time barely ticking over at 200 MHz)

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
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