GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  AMDTEMP (4)

NAME

amdtemp - device driver for AMD processor on-die digital thermal sensor

CONTENTS

Synopsis
Description
Sysctl Variables
See Also
History
Authors
Caveats

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:


.Cd device amdtemp

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

amdtemp_load="YES"

DESCRIPTION

The amdtemp driver provides support for the on-die digital thermal sensor present in AMD Family 0Fh, 10h, 11h, 12h, 14h, 15h, and 16h processors.

For Family 0Fh processors, the amdtemp driver reports each core’s temperature through sysctl nodes, named dev.amdtemp.%d.core{0,1}.sensor{0,1}. The driver also creates dev.cpu.%d.temperature in the corresponding CPU device’s sysctl tree, displaying the maximum temperature of the two sensors located in each CPU core.

For Family 10h, 11h, 12h, 14h, 15h, and 16h processors, the driver reports each package’s temperature through a sysctl node, named dev.amdtemp.%d.core0.sensor0. The driver also creates dev.cpu.%d.temperature in the corresponding CPU device’s sysctl tree, displaying the temperature of the shared sensor located in each CPU package.

SYSCTL VARIABLES

The following variable is available as both sysctl(8) variable and loader(8) tunable:
dev.amdtemp.%d.sensor_offset
 
Add the given offset to the temperature of the sensor. Default is 0.

SEE ALSO

loader(8), sysctl(8)

HISTORY

The amdtemp driver first appeared in
.Fx 7.1 .

AUTHORS


.An Rui Paulo Aq rpaulo@FreeBSD.org
.An Norikatsu Shigemura Aq nork@FreeBSD.org
.An Jung-uk Kim Aq jkim@FreeBSD.org

CAVEATS

For Family 10h and later processors, " (the reported temperature) is a non-physical temperature measured on an arbitrary scale and it does not represent an actual physical temperature like die or case temperature. Instead, it specifies the processor temperature relative to the point at which the system must supply the maximum cooling for the processor’s specified maximum case temperature and maximum thermal power dissipation " according to
.Rs BIOS and Kernel Developer’s Guide (BKDG) for AMD Processors
.Re
Search for    or go to Top of page |  Section 4 |  Main Index


Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.