Provided by: mcelog_0.4-4_i386 bug

NAME

       mcelog - Print machine check log from x86-64 kernel.

SYNOPSIS

       mcelog [--syslog] [--k8|--p4|--generic] [device]
       mcelog [--k8|--p4|--generic] --ascii

DESCRIPTION

       Linux  x86-64 kernels since 2.6.4 don’t print recoverable machine check
       errors to the kernel log anymore. Instead they are saved into a special
       kernel  buffer  accessible using /dev/mcelog.  mcelog reads /dev/mcelog
       and prints the stored machine check records to stdout. Then the  stored
       machine check records in the kernel buffer are deleted.

       When the --syslog option is specified redirect output to system log.

       When  --k8  is  specified  assume  the  events are for a AMD Opteron or
       Athlon 64 or Athlon FX CPU.  With --p4 is specified assume  the  events
       are for a Intel Pentium 4 or Intel Xeon.  When --generic all the fields
       are dumped without CPU specific decoding.  Default is to decode for the
       CPU mcelog is running on.

       When  a device is specified the machine check logs are read from device
       instead of the default /dev/mcelog.

       With the --ascii option mcelog decodes a fatal  machine  check  message
       ("CPU  n:  Machine Check Exception ...") in ASCII from stdout.  This is
       useful to make sense of the hexadecimal numbers there.

NOTES

       The kernel prefers old messages over new. If the log  buffer  overflows
       only old ones will be kept.

       The exact output depends on the CPU.

       This program should be run regularly from cron to collect machine check
       events.

FILES

       /dev/mcelog (char 10, minor 227)

SEE ALSO

       AMD  x86-64  architecture  programmer’s  manual,   Volume   2,   System
       programming
       IA32  Intel  Architecture Software developer’s manual, Volume 3, System
       programming guide
       Datasheet of your CPU.