Re: Core temperature
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Dag-Erling Sm=C3=B8rgrav wrote:
> 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.tempe=
rature
>> 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)?
>=20
> 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.
>=20
> here's what coretemp reports on my file server:
>=20
> hw.coretemp.tjmax: 100
> hw.coretemp.delta: -46
>=20
> although I believe this is actually one of the CPUs that have an 85=C2=B0=
C
> 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)=
>=20
Thanks for clearing it!
Regards,
> DES
--=20
Pietro Cerutti
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