.\"
.\" Copyright (c) 2003,2004 The DragonFly Project.  All rights reserved.
.\"
.\" This code is derived from software contributed to The DragonFly Project
.\" by Matthew Dillon <dillon@backplane.com>
.\"
.\" 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. Neither the name of The DragonFly Project 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 COPYRIGHT HOLDERS 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
.\" COPYRIGHT HOLDERS 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,
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.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\"
.\" $DragonFly: src/usr.bin/pctrack/pctrack.8,v 1.4 2006/07/22 18:49:25 swildner Exp $
.\"
.Dd June 8, 2006
.Dt PCTRACK 8
.Os
.Sh NAME
.Nm pctrack
.Nd print kernel system/interrupt PC sampling history
.Sh SYNOPSIS
.Nm
.Op Fl fnsi
.Op Fl c Ar cpu
.Op Fl N Ar execfile
.Op Fl M Ar corefile
.Op Ar interval
.Sh DESCRIPTION
Kernels compiled with
.Dv DEBUG_PCTRACK
record the program counter (PC) of
the code interrupted by the statistics clock interrupt.
This information can be dumped with the
.Nm
utility
.Pp
The following options are available:
.Bl -tag -width ".Fl N Ar execfile"
.It Fl c Ar cpu
Specify which CPU to dump.  If not specified, all CPUs will be dumped.
.It Fl f
If a single CPU and either
.Fl i
or
.Fl s
is specified, this option will use the repeat interval to detect changes
and dump them as they occur.
.It Fl i
Dump the interrupt tracking buffer.
.It Fl s
Dump the kernel tracking buffer.
If neither
.Fl i
or
.Fl s
is specified, both tracking buffers will be dumped.
.It Fl n
.Nm
normally tries to translate the PC into symbols.  This option forces hex
values to be displayed instead.
.It Fl N Ar execfile
The kernel image to resolve symbols from.
The default is the value returned via
.Xr getbootfile 3 .
.It Fl M Ar corefile
The core file or memory image to read from.
The default is
.Pa /dev/mem .
.El
.\".Sh OPERATIONAL NOTES
.Sh HISTORY
The
.Nm
utility first appeared in
.Dx 1.5 .
.Sh AUTHORS
.An -nosplit
The
.Nm
utility was originally implemented by
.An Matthew Dillon
for
.Dx .