2012-04-17 19:53:34 +08:00
|
|
|
What: /sys/devices/system/edac/mc/mc*/reset_counters
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This write-only control file will zero all the statistical
|
|
|
|
|
counters for UE and CE errors on the given memory controller.
|
|
|
|
|
Zeroing the counters will also reset the timer indicating how
|
|
|
|
|
long since the last counter were reset. This is useful for
|
|
|
|
|
computing errors/time. Since the counters are always reset
|
|
|
|
|
at driver initialization time, no module/kernel parameter
|
|
|
|
|
is available.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/seconds_since_reset
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays how many seconds have elapsed
|
|
|
|
|
since the last counter reset. This can be used with the error
|
|
|
|
|
counters to measure error rates.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/mc_name
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the type of memory controller
|
|
|
|
|
that is being utilized.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/size_mb
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays, in count of megabytes, of memory
|
|
|
|
|
that this memory controller manages.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/ue_count
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the total count of uncorrectable
|
|
|
|
|
errors that have occurred on this memory controller. If
|
|
|
|
|
panic_on_ue is set, this counter will not have a chance to
|
|
|
|
|
increment, since EDAC will panic the system
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/ue_noinfo_count
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the number of UEs that have
|
|
|
|
|
occurred on this memory controller with no information as to
|
|
|
|
|
which DIMM slot is having errors.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/ce_count
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the total count of correctable
|
|
|
|
|
errors that have occurred on this memory controller. This
|
|
|
|
|
count is very important to examine. CEs provide early
|
|
|
|
|
indications that a DIMM is beginning to fail. This count
|
|
|
|
|
field should be monitored for non-zero values and report
|
|
|
|
|
such information to the system administrator.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/ce_noinfo_count
|
|
|
|
|
Date: January 2006
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the number of CEs that
|
|
|
|
|
have occurred on this memory controller wherewith no
|
|
|
|
|
information as to which DIMM slot is having errors. Memory is
|
|
|
|
|
handicapped, but operational, yet no information is available
|
|
|
|
|
to indicate which slot the failing memory is in. This count
|
|
|
|
|
field should be also be monitored for non-zero values.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/sdram_scrub_rate
|
|
|
|
|
Date: February 2007
|
|
|
|
|
Contact: linux-edac@vger.kernel.org
|
|
|
|
|
Description: Read/Write attribute file that controls memory scrubbing.
|
|
|
|
|
The scrubbing rate used by the memory controller is set by
|
|
|
|
|
writing a minimum bandwidth in bytes/sec to the attribute file.
|
|
|
|
|
The rate will be translated to an internal value that gives at
|
|
|
|
|
least the specified rate.
|
|
|
|
|
Reading the file will return the actual scrubbing rate employed.
|
|
|
|
|
If configuration fails or memory scrubbing is not implemented,
|
|
|
|
|
the value of the attribute file will be -1.
|
2012-04-17 22:13:10 +08:00
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/max_location
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file displays the information about the last
|
|
|
|
|
available memory slot in this memory controller. It is used by
|
|
|
|
|
userspace tools in order to display the memory filling layout.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/size
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file will display the size of dimm or rank.
|
|
|
|
|
For dimm*/size, this is the size, in MB of the DIMM memory
|
|
|
|
|
stick. For rank*/size, this is the size, in MB for one rank
|
|
|
|
|
of the DIMM memory stick. On single rank memories (1R), this
|
|
|
|
|
is also the total size of the dimm. On dual rank (2R) memories,
|
|
|
|
|
this is half the size of the total DIMM memories.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_dev_type
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file will display what type of DRAM device is
|
|
|
|
|
being utilized on this DIMM (x1, x2, x4, x8, ...).
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_edac_mode
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file will display what type of Error detection
|
|
|
|
|
and correction is being utilized. For example: S4ECD4ED would
|
|
|
|
|
mean a Chipkill with x4 DRAM.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_label
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This control file allows this DIMM to have a label assigned
|
|
|
|
|
to it. With this label in the module, when errors occur
|
|
|
|
|
the output can provide the DIMM label in the system log.
|
|
|
|
|
This becomes vital for panic events to isolate the
|
|
|
|
|
cause of the UE event.
|
|
|
|
|
DIMM Labels must be assigned after booting, with information
|
|
|
|
|
that correctly identifies the physical slot with its
|
|
|
|
|
silk screen label. This information is currently very
|
|
|
|
|
motherboard specific and determination of this information
|
|
|
|
|
must occur in userland at this time.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_location
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file will display the location (csrow/channel,
|
|
|
|
|
branch/channel/slot or channel/slot) of the dimm or rank.
|
|
|
|
|
|
|
|
|
|
What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_mem_type
|
|
|
|
|
Date: April 2012
|
|
|
|
|
Contact: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
|
|
|
linux-edac@vger.kernel.org
|
|
|
|
|
Description: This attribute file will display what type of memory is
|
|
|
|
|
currently on this csrow. Normally, either buffered or
|
|
|
|
|
unbuffered memory (for example, Unbuffered-DDR3).
|
