DragonFly On-Line Manual Pages

MEMTEMP(4)            DragonFly Kernel Interfaces Manual            MEMTEMP(4)

NAME
     memtemp -- device driver for memory thermal sensor

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

           device dimm
           device coremctl
           device memtemp

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

           memtemp_load="YES"

DESCRIPTION
     The memtemp driver provides support for the memory thermal sensor.  The
     values are exposed through the HW_SENSORS sysctl(3) tree.  For example:

           % sysctl hw.sensors
           hw.sensors.dimm0.temp0: 40.00 degC (node0 chan0 DIMM0 temp), OK
           hw.sensors.dimm1.temp0: 39.00 degC (node0 chan1 DIMM0 temp), OK

     The DIMM location and configurable critical temperature thresholds are
     exposed through hw.dimminfo sysctl(3) tree.  For example:

           % sysctl hw.dimminfo
           hw.dimminfo.dimm0.node: 0
           hw.dimminfo.dimm0.chan: 0
           hw.dimminfo.dimm0.slot: 0
           hw.dimminfo.dimm0.temp_hiwat: 93
           hw.dimminfo.dimm0.temp_lowat: 88
           hw.dimminfo.dimm1.node: 0
           hw.dimminfo.dimm1.chan: 1
           hw.dimminfo.dimm1.slot: 0
           hw.dimminfo.dimm1.temp_hiwat: 93
           hw.dimminfo.dimm1.temp_lowat: 88

     If the temperature goes above the configured critical temperature
     threshold (temp_hiwat), a notify event will be sent using devctl(4).

HARDWARE
     The memtemp driver supports the following memory thermal sensors:

     o   Intel E5 v2 memory thermal sensors
     o   Intel E5 v3 memory thermal sensors
     o   Intel E3 v3 memory thermal sensors
     o   Intel Core i3/i5/i7 Haswell thermal sensors

SEE ALSO
     systat(1), sysctl(3), devctl(4), devd(8), sensorsd(8), sysctl(8)

HISTORY
     The memtemp driver first appeared in DragonFly 4.1.

AUTHORS
     The memtemp driver was written by Sepherosa Ziehau <sepherosa@gmail.com>.

DragonFly 5.5                    May 24, 2015                    DragonFly 5.5