2fe8fb192f
There is important information about booting non-ack images in docs/UPDATING. ack/aout-format images can't be built any more, and booting clang/ELF-format ones is a little different. Updating to the new boot monitor is recommended. Changes in this commit: . drop boot monitor -> allowing dropping ack support . facility to copy ELF boot files to /boot so that old boot monitor can still boot fairly easily, see UPDATING . no more ack-format libraries -> single-case libraries . some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases . drop several ack toolchain commands, but not all support commands (e.g. aal is gone but acksize is not yet). . a few libc files moved to netbsd libc dir . new /bin/date as minix date used code in libc/ . test compile fix . harmonize includes . /usr/lib is no longer special: without ack, /usr/lib plays no kind of special bootstrapping role any more and bootstrapping is done exclusively through packages, so releases depend even less on the state of the machine making them now. . rename nbsd_lib* to lib* . reduce mtree
115 lines
3.9 KiB
Groff
115 lines
3.9 KiB
Groff
.\" $NetBSD: moncontrol.3,v 1.10 2009/04/11 15:33:27 joerg Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1992, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)moncontrol.3 8.1 (Berkeley) 6/4/93
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.\"
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.Dd June 4, 1993
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.Dt MONCONTROL 3
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.Os
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.Sh NAME
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.Nm moncontrol ,
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.Nm monstartup
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.Nd control execution profile
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.Fn moncontrol "int mode"
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.Fn monstartup "u_long *lowpc" "u_long *highpc"
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.Sh DESCRIPTION
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An executable program compiled using the
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.Fl pg
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option to
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.Xr cc 1
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automatically includes calls to collect statistics for the
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.Xr gprof 1
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call-graph execution profiler.
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In typical operation, profiling begins at program startup
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and ends when the program calls exit.
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When the program exits, the profiling data are written to the file
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.Em gmon.out ,
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then
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.Xr gprof 1
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can be used to examine the results.
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.Pp
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.Fn moncontrol
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selectively controls profiling within a program.
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When the program starts, profiling begins.
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To stop the collection of histogram ticks and call counts use
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.Fn moncontrol 0 ;
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to resume the collection of histogram ticks and call counts use
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.Fn moncontrol 1 .
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This feature allows the cost of particular operations to be measured.
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Note that an output file will be produced on program exit
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regardless of the state of
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.Fn moncontrol .
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.Pp
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Programs that are not loaded with
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.Fl pg
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may selectively collect profiling statistics by calling
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.Fn monstartup
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with the range of addresses to be profiled.
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.Fa lowpc
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and
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.Fa highpc
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specify the address range that is to be sampled;
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the lowest address sampled is that of
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.Fa lowpc
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and the highest is just below
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.Fa highpc .
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Only functions in that range that have been compiled with the
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.Fl pg
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option to
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.Xr cc 1
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will appear in the call graph part of the output;
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however, all functions in that address range will
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have their execution time measured.
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Profiling begins on return from
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.Fn monstartup .
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.Sh ENVIRONMENT
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.Bl -tag -width "PROFDIR"
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.It Ev PROFDIR
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Directory to place the output file(s) in.
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When this is set, instead of writing the profiling output to
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.Pa gmon.out ,
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a filename is generated from the process id and name of the program
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(e.g.,
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.Pa 123.a.out ) .
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If you are profiling a program that forks,
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or otherwise creates multiple copies,
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setting this is the only reasonable way to get all profiling data.
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.El
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.Sh FILES
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.Bl -tag -width ".Pa gmon.out" -compact
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.It Pa gmon.out
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execution data file
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.El
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.Sh SEE ALSO
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.Xr cc 1 ,
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.Xr gprof 1 ,
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.Xr profil 2
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