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NAME    [Toc]    [Back]

     kdump - display kernel trace data

SYNOPSIS    [Toc]    [Back]

     kdump [-dnlRT] [-e emulation] [-f  file]  [-m  maxdata]  [-p
           [-t [ceinsw]]

DESCRIPTION    [Toc]    [Back]

     kdump   displays   the  kernel  trace  files  produced  with
ktrace(1) in humanreadable
 format.  By default, the  file  ktrace.out  in  the
current directory
 is displayed, unless overridden by the -f option.

     The options are as follows:

     -d       Display all numbers in decimal.  By default, values
are printed
             out in hexadecimal.

     -e emulation
             Interpret system call maps assuming the named emulation instead
             of  "bsd".  For example, to view trace output from a
Linux binary,
             use -e linux.

     -f file
             Display the specified file instead of ktrace.out.

     -l      Loop reading the trace file, once the end-of-file is
             waiting for more data.

     -m maxdata
             Display at most maxdata bytes when decoding I/O.

     -n       Suppress ad hoc translations.  Normally kdump tries
to decode
             many system calls into a more human-readable format.
For example,
  ioctl(2)  values  are  replaced with the macro
name and errno
             values are replaced  with  the  strerror(3)  string.
             this  feature yields a more consistent output format
and is easily
             amenable to further processing.

     -p pid  Show output only for the pid specified.

     -R      Display relative timestamps (time since previous entry).

     -T       Display absolute timestamps for each entry (seconds
since epoch).

     -t [ceinsw]
             Selects which tracepoints to display. See the -t option of
             ktrace(1) for the definitions of the flags.

FILES    [Toc]    [Back]

     ktrace.out  default ktrace dump file

SEE ALSO    [Toc]    [Back]


HISTORY    [Toc]    [Back]

     The kdump command appeared in 4.4BSD.

OpenBSD      3.6                           June      6,      1993
[ Back ]
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