1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" 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.\" @(#)kgmon.8 6.5 (Berkeley) 6/6/91 33.\" 34.Dd June 6, 1991 35.Dt KGMON 8 36.Os BSD 4.2 37.Sh NAME 38.Nm kgmon 39.Nd generate a dump of the operating system's profile buffers 40.Sh SYNOPSIS 41.Nm kgmon 42.Op Fl bhpr 43.Op Fl M core 44.Op Fl N system 45.Sh DESCRIPTION 46.Nm Kgmon 47is a tool used when profiling the operating system. 48When no arguments are supplied, 49.Nm kgmon 50indicates the state of operating system profiling as running, 51off, or not configured. 52(see 53.Xr config 8 ) 54If the 55.Fl p 56flag is specified, 57.Nm kgmon 58extracts profile data from the operating system and produces a 59.Pa gmon.out 60file suitable for later analysis by 61.Xr gprof 1 . 62.Pp 63The options are as follows: 64.Bl -tag -width Ds 65.It Fl b 66Resume the collection of profile data. 67.It Fl h 68Stop the collection of profile data. 69.It Fl p 70Dump the contents of the profile buffers into a 71.Pa gmon.out 72file. 73.It Fl r 74Reset all the profile buffers. 75If the 76.Fl p 77flag is also specified, the 78.Pa gmon.out 79file is generated before the buffers are reset. 80.It Fl M 81Extract values associated with the name list from the specified core 82instead of the default ``/dev/kmem''. 83.It Fl N 84Extract the name list from the specified system instead of the 85default ``/netbsd''. 86.El 87.Pp 88If neither 89.Fl b 90nor 91.Fl h 92is specified, the state of profiling collection remains unchanged. 93For example, if the 94.Fl p 95flag is specified and profile data is being collected, 96profiling will be momentarily suspended, 97the operating system profile buffers will be dumped, 98and profiling will be immediately resumed. 99.Sh FILES 100.Bl -tag -width /dev/kmem -compact 101.It Pa /dev/kmem 102default kernel memory 103.It Pa /netbsd 104default system namelist 105.El 106.Sh SEE ALSO 107.Xr gprof 1 , 108.Xr config 8 109.Sh DIAGNOSTICS 110Users with only read permission on 111.Pa /dev/kmem 112cannot change the state 113of profiling collection. 114They can get a 115.Pa gmon.out 116file with the warning that the data may be 117inconsistent if profiling is in progress. 118.Sh HISTORY 119The 120.Nm 121command appeared in 122.Bx 4.2 . 123