AMDZENTEMP(4) | Device Drivers Manual (x86) | AMDZENTEMP(4) |
amdzentemp
—
amdzentemp* at amdsmnbus?
amdzentemp
driver provides support for the on-die
digital thermal sensor present on AMD Ryzen CPUs and some later AMD Opteron
CPUs.
These sensors provide 0.125°C accuracy. There is one sensor for each CPU socket.
The amdzentemp
driver reports temperatures
through the envsys(4)
API.
Sensor | Units | Typical Use |
CPUN sensor0 | μK | cpuN temperature |
amdzentemp
driver first appeared in
OpenBSD 4.4 named “kate”. It was then
ported to NetBSD 5.0 under the name
amdtemp(4). The
FreeBSD version of the driver was updated with support
for newer AMD CPUs. For NetBSD, the support for the
newer CPUs was separated into its own amdzentemp
driver.
amdzentemp
driver was written by
Constantine A. Murenin
<cnst@openbsd.org>
whilst at the University of Waterloo. Porting of support for the newer AMD
CPUs from FreeBSD was provided by Ian
Clark.
The sensor has a thermal-trip value which should be retrieved and provided to envsys(4) as the sensors critical-maximum value.
April 20, 2020 | NetBSD 9.4 |