.\" Copyright (c) 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)kdump.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD: src/usr.bin/kdump/kdump.1,v 18.104.22.168 2001/08/16 13:16:51 ru Exp $ .\" .Dd June 6, 1993 .Dt KDUMP 1 .Os .Sh NAME .Nm kdump .Nd display kernel trace data .Sh SYNOPSIS .Nm .Op Fl dnlRT .Op Fl f Ar file .Op Fl m Ar maxdata .Op Fl t Op cnisuw .Sh DESCRIPTION The .Nm command displays the kernel trace files produced with .Xr ktrace 1 in human readable format. By default, the file .Pa ktrace.out in the current directory is displayed. .Pp The options are as follows: .Bl -tag -width Fl .It Fl d Display all numbers in decimal. .It Fl f Ar file Display the specified file instead of .Pa ktrace.out . .It Fl l Loop reading the trace file, once the end-of-file is reached, waiting for more data. .It Fl m Ar maxdata Display at most .Ar maxdata bytes when decoding .Tn I/O . .It Fl n Suppress ad hoc translations. Normally .Nm tries to decode many system calls into a more human readable format. For example, .Xr ioctl 2 values are replaced with the macro name and .Va errno values are replaced with the .Xr strerror 3 string. Suppressing this feature yields a more consistent output format and is easily amenable to further processing. .It Fl R Display relative timestamps (time since previous entry). .It Fl T Display absolute timestamps for each entry (seconds since epoch). .It Fl t Ar cnisuw See the .Fl t option of .Xr ktrace 1 . .El .Sh SEE ALSO .Xr ktrace 1 .Sh HISTORY The .Nm command appeared in .Bx 4.4 .