1.\"- 2.\" Copyright (c) 2002 Chad David 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd October 22, 2018 29.Dt KTRDUMP 8 30.Os 31.Sh NAME 32.Nm ktrdump 33.Nd print kernel ktr trace buffer 34.Sh SYNOPSIS 35.Nm 36.Op Fl cflqrtH 37.Op Fl i Ar ktrfile 38.Op Fl M Ar core 39.Op Fl N Ar system 40.Op Fl o Ar outfile 41.Sh DESCRIPTION 42The 43.Nm 44utility is used to dump the contents of the kernel ktr trace buffer. 45.Pp 46The following options are available: 47.Bl -tag -width ".Fl i Ar ktrfile" 48.It Fl c 49Print the CPU number that each entry was logged from. 50.It Fl l 51Poll the kernel ktr trace buffer periodically dumping any new events after 52each poll. 53.It Fl f 54Print the file and line number that each entry was logged from. 55.It Fl q 56Quiet mode; do not print the column header. 57.It Fl r 58Print relative timestamps rather than absolute timestamps. 59.It Fl t 60Print the timestamp for each entry. 61.It Fl H 62Print the thread ID for each entry. 63.It Fl i Ar ktrfile 64File containing saved ktr trace events; for more information see the 65.Xr ktr 4 66manual page. 67.It Fl N Ar system 68The kernel image to resolve symbols from. 69The default is the value returned via 70.Xr getbootfile 3 . 71.It Fl M Ar core 72The core file or memory image to read from. 73The default is 74.Pa /dev/mem . 75.It Fl o Ar outfile 76The file to write the output to. 77The default is standard output. 78.El 79.Sh SEE ALSO 80.Xr ktr 4 , 81.Xr ktr 9 82.Sh HISTORY 83The 84.Nm 85utility first appeared in 86.Fx 5.0 . 87.Sh AUTHORS 88.An -nosplit 89The 90.Nm 91utility was implemented by 92.An Jake Burkholder Aq Mt jake@FreeBSD.org . 93.Pp 94This manual page was written by 95.An Chad David Aq Mt davidc@FreeBSD.org . 96