Date: Fri, 10 Aug 2007 13:25:48 +0200 From: Pietro Cerutti <gahr@gahr.ch> To: =?UTF-8?B?RGFnLUVybGluZyBTbcO4cmdyYXY=?= <des@des.no>, freebsd-hackers@freebsd.org Subject: Re: Core temperature Message-ID: <46BC4B3C.1060302@gahr.ch> In-Reply-To: <86r6mb7i9k.fsf@ds4.des.no> References: <86myx0pa9i.fsf@ds4.des.no> <46BC4309.8000802@gahr.ch> <86r6mb7i9k.fsf@ds4.des.no>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig9F27992FBCD777D2ADE3896C Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 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 PGP Public Key: http://gahr.ch/pgp --------------enig9F27992FBCD777D2ADE3896C Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGvEtAwMJqmJVx944RCn1XAJ9gwb2AAg2Eqo9NdnhVIR8gFJOaEQCgoWDY 5OzFvKRKmkBuRZye75VdAm4= =2D8B -----END PGP SIGNATURE----- --------------enig9F27992FBCD777D2ADE3896C--
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