1.\" Copyright (c) 1980, 1991, 1992, 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.\" from: @(#)moncontrol.3 8.1 (Berkeley) 6/4/93 33.\" $Id: moncontrol.3,v 1.2 1994/05/14 06:31:19 cgd Exp $ 34.\" 35.Dd June 4, 1993 36.Dt MONCONTROL 3 37.Os BSD 4 38.Sh NAME 39.Nm moncontrol , 40.Nm monstartup 41.Nd control execution profile 42.Sh SYNOPSIS 43.Fn moncontrol "int mode" 44.Fn monstartup "u_long *lowpc" "u_long *highpc" 45.Sh DESCRIPTION 46An executable program compiled using the 47.Fl pg 48option to 49.Xr cc 1 50automatically includes calls to collect statistics for the 51.Xr gprof 1 52call-graph execution profiler. 53In typical operation, profiling begins at program startup 54and ends when the program calls exit. 55When the program exits, the profiling data are written to the file 56.Em gmon.out , 57then 58.Xr gprof 1 59can be used to examine the results. 60.Pp 61.Fn moncontrol 62selectively controls profiling within a program. 63When the program starts, profiling begins. 64To stop the collection of histogram ticks and call counts use 65.Fn moncontrol 0 ; 66to resume the collection of histogram ticks and call counts use 67.Fn moncontrol 1 . 68This feature allows the cost of particular operations to be measured. 69Note that an output file will be produced on program exit 70regardless of the state of 71.Fn moncontrol . 72.Pp 73Programs that are not loaded with 74.Fl pg 75may selectively collect profiling statistics by calling 76.Fn monstartup 77with the range of addresses to be profiled. 78.Fa lowpc 79and 80.Fa highpc 81specify the address range that is to be sampled; 82the lowest address sampled is that of 83.Fa lowpc 84and the highest is just below 85.Fa highpc . 86Only functions in that range that have been compiled with the 87.Fl pg 88option to 89.Xr cc 1 90will appear in the call graph part of the output; 91however, all functions in that address range will 92have their execution time measured. 93Profiling begins on return from 94.Fn monstartup . 95.Sh FILES 96.Bl -tag -width Pa -compact 97.It Pa gmon.out execution data file 98.El 99.Sh SEE ALSO 100.Xr cc 1 , 101.Xr gprof 1 , 102.Xr profil 2 103