KDUMP(1) BSD General Commands Manual KDUMP(1)NAME
kdump — display kernel trace data
SYNOPSIS
kdump [-dnlRT] [-f file] [-m maxdata] [-t [cnis]]
DESCRIPTION
Kdump displays the kernel trace files produced with ktrace(1) in human
readable format. By default, the file ktrace.out in the current direc‐
tory 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. Sup‐
pressing this feature yields a more consistent output format
and is easily amenable to further processing.
-R Display relative timestamps (time since previous entry).
-T Display absolute timestamps for each entry (seconds since
epoch).
-t cnis See the -t option of ktrace(1).
SEE ALSOktrace(1)HISTORY
The kdump command appears in 4.4BSD.
4.4BSD June 6, 1993 4.4BSD
