kgmon(8) [netbsd man page]

KGMON(8)						    BSD System Manager's Manual 						  KGMON(8)

NAME

     kgmon -- generate a dump of the operating system's profile buffers

SYNOPSIS

     kgmon [-bdhpr] [-M core] [-N system]

DESCRIPTION

     kgmon is a tool used when profiling the operating system.	When no arguments are supplied, kgmon indicates the state of operating system pro-
     filing as running, off, or not configured (see config(1)).  If the -p flag is specified, kgmon extracts profile data from the operating sys-
     tem and produces a gmon.out file suitable for later analysis by gprof(1).

     The options are as follows:

     -b      Resume the collection of profile data.

     -d      Enable debug output.

     -h      Stop the collection of profile data.

     -M core
	     Extract values associated with the name list from the specified core instead of the default /dev/kmem.

     -N system
	     Extract the name list from the specified system instead of the default /netbsd.

     -p      Dump the contents of the profile buffers into a gmon.out file.

     -r      Reset all the profile buffers.  If the -p flag is also specified, the gmon.out file is generated before the buffers are reset.

     If neither -b nor -h is specified, the state of profiling collection remains unchanged.  For example, if the -p flag is specified and profile
     data is being collected, profiling will be momentarily suspended, the operating system profile buffers will be dumped, and profiling will be
     immediately resumed.

FILES

     /netbsd	 the default system
     /dev/kmem	 the default memory

DIAGNOSTICS

     Users with only read permission on /dev/kmem cannot change the state of profiling collection.  They can get a gmon.out file with the warning
     that the data may be inconsistent if profiling is in progress.

SEE ALSO

     config(1), gprof(1)

HISTORY

     The kgmon command appeared in 4.2BSD.

BSD
								   June 6, 1993 							       BSD

MONCONTROL(3)						   BSD Library Functions Manual 					     MONCONTROL(3)

NAME

     moncontrol, monstartup -- control execution profile

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     moncontrol(int mode);

     monstartup(u_long *lowpc, u_long *highpc);

DESCRIPTION

     An executable program compiled using the -pg option to cc(1) automatically includes calls to collect statistics for the 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 gmon.out, then gprof(1) can be used to examine the results.

     moncontrol() selectively controls profiling within a program.  When the program starts, profiling begins.	To stop the collection of his-
     togram ticks and call counts use moncontrol(0); to resume the collection of histogram ticks and call counts use 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 moncontrol().

     Programs that are not loaded with -pg may selectively collect profiling statistics by calling monstartup() with the range of addresses to be
     profiled.	lowpc and highpc specify the address range that is to be sampled; the lowest address sampled is that of lowpc and the highest is
     just below highpc.  Only functions in that range that have been compiled with the -pg option to 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
     monstartup().

ENVIRONMENT

     PROFDIR  Directory to place the output file(s) in.  When this is set, instead of writing the profiling output to gmon.out, a filename is gen-
	      erated from the process id and name of the program (e.g., 123.a.out).  If you are profiling a program that forks, or otherwise cre-
	      ates multiple copies, setting this is the only reasonable way to get all profiling data.

FILES

     gmon.out  execution data file

SEE ALSO

     cc(1), gprof(1), profil(2)

BSD
								   June 4, 1993 							       BSD