DragonFly On-Line Manual Pages

ECC(4)                DragonFly Kernel Interfaces Manual                ECC(4)

NAME
     ecc -- ECC memory controller support

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

           device dimm
           device coremctl
           device ecc

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

           ecc_load="YES"

DESCRIPTION
     The ecc provides support for ECC memory controllers.  If ECC support is
     enabled in the BIOS, the number of ECC errors is exposed through
     HW_SENSORS sysctl(8) tree.  For example:

           % sysctl hw.sensors
           hw.sensors.dimm0.ecc0: 0 (node0 chan0 DIMM0 ecc), OK
           hw.sensors.dimm1.ecc0: 0 (node0 chan1 DIMM0 ecc), OK

     The DIMM location and configurable threshold of ECC errors is 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.ecc_thresh: 10
           hw.dimminfo.dimm1.node: 0
           hw.dimminfo.dimm1.chan: 1
           hw.dimminfo.dimm1.slot: 0
           hw.dimminfo.dimm1.ecc_thresh: 10

     If the number of ECC errors goes above the configured threshold
     (ecc_thresh), a notify event will be sent using devctl(4).

HARDWARE
     The ecc driver supports the following memory controllers:

     o   AMD 8000 memory controller
     o   AMD 8151 memory controller
     o   Intel E3 memory controller
     o   Intel E3 v2 memory controller
     o   Intel E3 v3 memory controller
     o   Intel E5 v2 memory controller
     o   Intel E5 v3 memory controller

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

HISTORY
     The ecc device driver first appeared in DragonFly 1.7.

AUTHORS
     The ecc driver was written by Matthew Dillon.

DragonFly 5.5                    May 24, 2015                    DragonFly 5.5