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 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: * AMD 8000 memory controller * AMD 8151 memory controller * Intel E3 memory controller * Intel E3 v2 memory controller * Intel E3 v3 memory controller * Intel E5 v2 memory controller * 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 4.3 May 24, 2015 DragonFly 4.3