NAME
amdtemp —
AMD CPU on-die digital thermal
sensor
SYNOPSIS
amdtemp* at amdnb_miscbus?
DESCRIPTION
Theamdtemp driver provides support for the on-die
digital thermal sensor present on AMD K8, AMD Barcelona, AMD Phenom, AMD
Griffin, AMD Fusion, AMD Bobcat, and AMD Puma CPUs.
These sensors were officially introduced in AMD K8 Revision F processors, and provide 0.5°C accuracy. Precision was improved in Revision G chips, which provide two more bits for 0.25°C steppings. Each core has two temperature sensors, and there are up to two cores per CPU socket.
AMD Barcelona, AMD Phenom, AMD Griffin, AMD Fusion, AMD Bobcat, and AMD Puma provide 0.125°gC accuracy and provide one temperature sensor for each CPU socket.
The amdtemp driver reports temperatures
through the envsys(4) API.
| Sensor | Units | Typical Use |
| CPUN sensor0 | μK | cpuN temperature |
SEE ALSO
HISTORY
The amdtemp driver first appeared in
OpenBSD 4.4 named “kate”. It was then
ported to NetBSD 5.0. The driver has been renamed
with support for newer AMD CPUs.
AUTHORS
The amdtemp driver was written by
Constantine A. Murenin
<cnst@openbsd.org>
whilst at the University of Waterloo. It was adapted to
NetBSD by Christoph
Egger.