.\" Copyright (c) 1980, 1991, 1992, 1993.\"	The Regents of the University of California.  All rights reserved..\".\" 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. All advertising materials mentioning features or use of this software.\"    must display the following acknowledgement:.\"	This product includes software developed by the University of.\"	California, Berkeley and its contributors..\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF.\" SUCH DAMAGE..\".\"	@(#)moncontrol.3	8.1 (Berkeley) 6/4/93.\".Dd June 4, 1993.Dt MONCONTROL 3.Os BSD 4.Sh NAME.Nm moncontrol ,.Nm monstartup.Nd control execution profile.Sh SYNOPSIS.Fn moncontrol "int mode".Fn monstartup "u_long *lowpc" "u_long *highpc".Sh DESCRIPTIONAn executable program compiled using the.Fl pgoption to.Xr cc 1automatically includes calls to collect statistics for the.Xr gprof 1call-graph execution profiler.In typical operation, profiling begins at program startupand ends when the program calls exit.When the program exits, the profiling data are written to the file.Em gmon.out ,then.Xr gprof 1can be used to examine the results..Pp.Fn moncontrolselectively controls profiling within a program.When the program starts, profiling begins.To stop the collection of histogram ticks and call counts use.Fn moncontrol 0 ;to resume the collection of histogram ticks and call counts use.Fn moncontrol 1 .This feature allows the cost of particular operations to be measured.Note that an output file will be produced on program exitregardless of the state of .Fn moncontrol ..PpPrograms that are not loaded with.Fl pgmay selectively collect profiling statistics by calling.Fn monstartupwith the range of addresses to be profiled..Fa lowpcand.Fa highpcspecify the address range that is to be sampled;the lowest address sampled is that of.Fa lowpcand the highest is just below.Fa highpc .Only functions in that range that have been compiled with the .Fl pgoption to.Xr cc 1will appear in the call graph part of the output;however, all functions in that address range willhave their execution time measured.Profiling begins on return from.Fn monstartup ..Sh FILES.Bl -tag -width Pa -compact.It Pa gmon.out	execution data file.El.Sh SEE ALSO.Xr cc 1 ,.Xr gprof 1 ,.Xr profil 2