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gmon/moncontrol.3 Libc-1725.40.4 /dev/null
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-.\"	$OpenBSD: moncontrol.3,v 1.2 1996/08/19 08:28:06 tholo Exp $
-.\"
-.\" 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.
-.\"
-.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 DESCRIPTION
-An executable program compiled using the
-.Fl pg
-option to
-.Xr cc 1
-automatically includes calls to collect statistics for the
-.Xr gprof 1
-call-graph execution profiler.
-In typical operation, profiling begins at program startup
-and ends when the program calls exit.
-When the program exits, the profiling data are written to the file
-.Em gmon.out ,
-then
-.Xr gprof 1
-can be used to examine the results.
-.Pp
-.Fn moncontrol
-selectively 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 exit
-regardless of the state of 
-.Fn moncontrol .
-.Pp
-Programs that are not loaded with
-.Fl pg
-may selectively collect profiling statistics by calling
-.Fn monstartup
-with the range of addresses to be profiled.
-.Fa lowpc
-and
-.Fa highpc
-specify the address range that is to be sampled;
-the lowest address sampled is that of
-.Fa lowpc
-and the highest is just below
-.Fa highpc .
-Only functions in that range that have been compiled with the 
-.Fl pg
-option to
-.Xr cc 1
-will appear in the call graph part of the output;
-however, all functions in that address range will
-have 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