1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)kdump.1 8.1 (Berkeley) 6/6/93 29.\" $FreeBSD: src/usr.bin/kdump/kdump.1,v 1.5.2.2 2001/08/16 13:16:51 ru Exp $ 30.\" $DragonFly: src/usr.bin/kdump/kdump.1,v 1.5 2007/05/07 15:43:31 dillon Exp $ 31.\" 32.Dd June 6, 1993 33.Dt KDUMP 1 34.Os 35.Sh NAME 36.Nm kdump 37.Nd display kernel trace data 38.Sh SYNOPSIS 39.Nm 40.Op Fl acdjnlRT 41.Op Fl f Ar file 42.Op Fl m Ar maxdata 43.Op Fl t Op cnisuw 44.Op Fl p Ar pid 45.Sh DESCRIPTION 46The 47.Nm 48command displays the kernel trace files produced with 49.Xr ktrace 1 50in human readable format. 51By default, the file 52.Pa ktrace.out 53in the current directory is displayed. 54.Pp 55The options are as follows: 56.Bl -tag -width Fl 57.It Fl a 58Display full human readable output. 59This option turns on 60.Fl c 61and 62.Fl R . 63.It Fl c 64Display the cpu the thread is executing on. 65.It Fl d 66Display all numbers in decimal. 67.It Fl j 68Use a fixed format output, otherwise a more human readable output is used. 69.It Fl f Ar file 70Display the specified file instead of 71.Pa ktrace.out . 72.It Fl l 73Loop reading the trace file, once the end-of-file is reached, waiting for 74more data. 75.It Fl m Ar maxdata 76Display at most 77.Ar maxdata 78bytes when decoding 79.Tn I/O ; 80set to 81.Cm 0 82to disable the size limit. 83.It Fl p Ar pid 84Display only records for process 85.Ar pid . 86.It Fl n 87Suppress ad hoc translations. 88Normally 89.Nm 90tries to decode many system calls into a more human readable format. 91For example, 92.Xr ioctl 2 93values are replaced with the macro name and 94.Va errno 95values are replaced with the 96.Xr strerror 3 97string. 98Suppressing this feature yields a more consistent output format and is 99easily amenable to further processing. 100.It Fl R 101Display relative timestamps (time since previous entry). 102.It Fl T 103Display absolute timestamps for each entry (seconds since epoch). 104.It Fl t Ar cnisuw 105See the 106.Fl t 107option of 108.Xr ktrace 1 . 109.El 110.Sh SEE ALSO 111.Xr ktrace 1 112.Sh HISTORY 113The 114.Nm 115command appeared in 116.Bx 4.4 . 117