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NAME    [Toc]    [Back]

     kdump -- display kernel trace data

SYNOPSIS    [Toc]    [Back]

     kdump [-dnlERT] [-f file] [-m maxdata] [-p pid] [-t [cnisuw]]

DESCRIPTION    [Toc]    [Back]

     The kdump command 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.

     The options are as follows:

     -d 	 Display all numbers in decimal.

     -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	 Display only trace events that correspond to the process pid.
		 This may be useful when there are multiple processes recorded
		 in the same trace file.

     -E 	 Display elapsed timestamps (time since beginning of trace).

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

     -T 	 Display absolute timestamps for each entry (seconds since

     -t cnisuw	 See the -t option of ktrace(1).

SEE ALSO    [Toc]    [Back]


HISTORY    [Toc]    [Back]

     The kdump command appeared in 4.4BSD.

FreeBSD 5.2.1			 June 6, 1993			 FreeBSD 5.2.1
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