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KDUMP(1)		  BSD General Commands Manual		      KDUMP(1)

NAME
     kdump — display kernel trace data

SYNOPSIS
     kdump [-dlNnRT] [-e emulation] [-f file] [-m maxdata] [-p pid] [-t trstr]
	   [-x | -X size] [file]

DESCRIPTION
     kdump displays the kernel trace files produced with ktrace(1) in human
     readable format.  The file ktrace.out in the current directory is dis‐
     played, unless either the -f option is used, or a file name is supplied
     as the last argument.

     The options are as follows:

     -d		 Display all numbers in decimal.

     -e emulation
		 If an emulation of a process is unknown, interpret system
		 call maps assuming the named emulation instead of default
		 "netbsd".

     -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 system call number-to-name translation.

     -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.	 Sup‐
		 pressing this feature yields a more consistent output format
		 and is easily amenable to further processing.

     -p pid	 Only display records from the trace file that are for the
		 indicated pid.

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

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

     -t trstr	 Restrict display to the specified set of kernel trace points.
		 The default is to display everything in the file.  See the -t
		 option of ktrace(1).

     -x		 Display GIO data in hex and ascii instead of vis(3) format.

     -X size	 Same as -x but display hex values by groups of size bytes.
		 Supported values are 1, 2, 4, 8, and 16.

SEE ALSO
     ktrace(1)

HISTORY
     The kdump command appears in 4.4BSD.

BSD			       November 15, 2003			   BSD

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