AIX 5L Problem Determination - IBM Redbooks

► ? or help[]
Lists all subcommands.
Provides information about crash subcommands.
► cm [thread slot][seg_no]
Changes the map of the crash command internal pointers for any process
thread segment not paged out. Resets the map of internal pointers if no
parameters are used.
► fs [thread slotNumber]
Dumps the kernel stack frames for the specified thread.
► dlock [tid] | -p [processor_num]
Displays deadlock information about all types of locks: Simple, complex, and
lockl.
► errpt [count]
Displays error log messages. The errpt subcommand always prints all
messages that have not yet been read by the errdemon. Count specifies the
number of messages to print.
► du
Dump user area of process.
► ppd
Display per processor data area; useful for multiprocessor systems. Shows all
data that varies for each processor, such as Current Save Area (CSA).
► symptom
If your system supports symptom, this is a useful subcommand to obtain a
quick snapshot of dump information.
The stat subcommand
The stat subcommand provides plenty of useful information about a dump, such
as the dump code, the panic string, time of the crash, version and release of the
operating system, name of the machine that crashed, and how long the machine
had been running since the last crash or power off of the system. For example:
> stat
sysname: AIX
nodename: kmdvs
release: 3
version: 4
machine: 000939434C00
time of crash: Mon May 3 17:49:46 KORST 1999
age of system: 2 day, 4 hr., 28 min.
86 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques