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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)kdump.1 8.1 (Berkeley) 6/6/93 33.\" $FreeBSD: src/usr.bin/kdump/kdump.1,v 1.5.2.2 2001/08/16 13:16:51 ru Exp $ 34.\" $DragonFly: src/usr.bin/kdump/kdump.1,v 1.5 2007/05/07 15:43:31 dillon Exp $ 35.\" 36.Dd June 6, 1993 37.Dt KDUMP 1 38.Os 39.Sh NAME 40.Nm kdump 41.Nd display kernel trace data 42.Sh SYNOPSIS 43.Nm 44.Op Fl acdjnlRT 45.Op Fl f Ar file 46.Op Fl m Ar maxdata 47.Op Fl t Op cnisuw 48.Op Fl p Ar pid 49.Sh DESCRIPTION 50The 51.Nm 52command displays the kernel trace files produced with 53.Xr ktrace 1 54in human readable format. 55By default, the file 56.Pa ktrace.out 57in the current directory is displayed. 58.Pp 59The options are as follows: 60.Bl -tag -width Fl 61.It Fl a 62Display full human readable output. 63This option turns on 64.Fl c 65and 66.Fl R . 67.It Fl c 68Display the cpu the thread is executing on. 69.It Fl d 70Display all numbers in decimal. 71.It Fl j 72Use a fixed format output, otherwise a more human readable output is used. 73.It Fl f Ar file 74Display the specified file instead of 75.Pa ktrace.out . 76.It Fl l 77Loop reading the trace file, once the end-of-file is reached, waiting for 78more data. 79.It Fl m Ar maxdata 80Display at most 81.Ar maxdata 82bytes when decoding 83.Tn I/O ; 84set to 85.Cm 0 86to disable the size limit. 87.It Fl p Ar pid 88Display only records for process 89.Ar pid . 90.It Fl n 91Suppress ad hoc translations. 92Normally 93.Nm 94tries to decode many system calls into a more human readable format. 95For example, 96.Xr ioctl 2 97values are replaced with the macro name and 98.Va errno 99values are replaced with the 100.Xr strerror 3 101string. 102Suppressing this feature yields a more consistent output format and is 103easily amenable to further processing. 104.It Fl R 105Display relative timestamps (time since previous entry). 106.It Fl T 107Display absolute timestamps for each entry (seconds since epoch). 108.It Fl t Ar cnisuw 109See the 110.Fl t 111option of 112.Xr ktrace 1 . 113.El 114.Sh SEE ALSO 115.Xr ktrace 1 116.Sh HISTORY 117The 118.Nm 119command appeared in 120.Bx 4.4 . 121