1 .\" Copyright (c) 1980, 1991, 1992, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
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.
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
28 .\" @(#)moncontrol.3 8.1 (Berkeley) 6/4/93
29 .\" $FreeBSD: src/lib/libc/gmon/moncontrol.3,v 1.17 2007/01/09 00:27:58 imp Exp $
30 .\" $DragonFly: src/lib/libc/gmon/moncontrol.3,v 1.2 2003/06/17 04:26:42 dillon Exp $
38 .Nd control execution profile
45 .Fn moncontrol "int mode"
47 .Fn monstartup "u_long lowpc" "u_long highpc"
49 An executable program compiled using the
53 automatically includes calls to collect statistics for the
55 call-graph execution profiler.
56 In typical operation, profiling begins at program startup
57 and ends when the program calls exit.
58 When the program exits, the profiling data are written to the file
59 .Ar progname Ns Pa .gmon ,
60 where progname is the name of the program, then
62 can be used to examine the results.
67 selectively controls profiling within a program.
68 When the program starts, profiling begins.
69 To stop the collection of histogram ticks and call counts use
71 to resume the collection of histogram ticks and call counts use
73 This feature allows the cost of particular operations to be measured.
74 Note that an output file will be produced on program exit
75 regardless of the state of
78 Programs that are not loaded with
80 may selectively collect profiling statistics by calling
82 with the range of addresses to be profiled.
88 specify the address range that is to be sampled;
89 the lowest address sampled is that of
91 and the highest is just below
93 Only functions in that range that have been compiled with the
97 will appear in the call graph part of the output;
98 however, all functions in that address range will
99 have their execution time measured.
100 Profiling begins on return from
103 .Bl -tag -width progname.gmon -compact