Date: Fri, 10 Aug 2007 01:18:33 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: hackers@freebsd.org Subject: Core temperature Message-ID: <86myx0pa9i.fsf@ds4.des.no>
next in thread | raw e-mail | index | archive | help
I've written a quick-and-dirty driver for the built-in digital
temperature sensor in Intel's Core and Core 2 CPUs (and Xeons built on
the Core architecture). The driver exports four sysctl nodes under
hw.coretemp:
hw.coretemp.tjmax Maximum core temperature (currently hardcoded
To 100=C2=B0C, may actually be 85=C2=B0C on some sy=
stems)
hw.coretemp.delta current temperature in =C2=B0C below Tj(max)
hw.coretemp.interrupt Lower 32 bits of the IA32_THERMAL_INTERRUPT MSR
hw.coretemp.status Lower 32 bits of the IA32_THERMAL_STATUS MSR
I intend to move these into dev.cpu.N in a later version.
Note that the driver currently makes no attempt to handle multi-CPU
systems; it will simply report the temperature of the CPU that contains
whichever core the requesting process happens to be running on.
http://people.freebsd.org/~des/software/coretemp-20070810.diff
DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?86myx0pa9i.fsf>