kdump - display kernel trace data
kdump [-dnlRT] [-e emulation] [-f file] [-m maxdata] [-p
pid]
[-t [ceinsw]]
kdump displays the kernel trace files produced with
ktrace(1) in humanreadable
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 epoch).
-t [ceinsw]
Selects which tracepoints to display. See the -t option of
ktrace(1) for the definitions of the flags.
ktrace.out default ktrace dump file
ktrace(1)
The kdump command appeared in 4.4BSD.
OpenBSD 3.6 June 6, 1993
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