kdump man page on OpenBSD

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KDUMP(1)		   OpenBSD Reference Manual		      KDUMP(1)

NAME
     kdump - display kernel trace data

SYNOPSIS
     kdump [-dlnRTXx] [-e emulation] [-f file] [-m maxdata] [-p pid]
	   [-t [ceinsw]]

DESCRIPTION
     kdump displays the kernel trace files produced with ktrace(1) in human-
     readable 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 reached,
	     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.
	     Suppressing 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 the
	     Epoch).

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

     -X	     Display I/O data with hexadecimal data and printable ASCII
	     characters side by side.

     -x	     Display I/O data in hexadecimal.

FILES
     ktrace.out	 default ktrace dump file

SEE ALSO
     ktrace(1)

HISTORY
     The kdump command appeared in 4.4BSD.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9
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