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KDUMP(1)                FreeBSD General Commands Manual               KDUMP(1)

NAME
     kdump - display kernel trace data

SYNOPSIS
     kdump [-dEnlRT] [-f trfile] [-m maxdata] [-p pid] [-t [cnisuw]]

DESCRIPTION
     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.

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

     -f trfile   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.

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

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

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

SEE ALSO
     ktrace(1)

HISTORY
     The kdump command appeared in 4.4BSD.

FreeBSD 11.0-PRERELEASE        December 8, 2003        FreeBSD 11.0-PRERELEASE

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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