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

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

SYNOPSIS
     kgmon [-Bbhpr] [-M core] [-N system]

DESCRIPTION
     The kgmon utility is used when profiling the operating system.  When no ar-
     guments are supplied, kgmon indicates the state of operating system profil-
     ing  as running, off, or not configured.  (see config(8)) If the -p flag is
     specified, kgmon extracts profile data from the operating system  and  pro-
     duces a gmon.out file suitable for later analysis by gprof(1).

     The options are as follows:

     -B      Resume the collection of high resolution profile data.

     -b      Resume the collection of low resolution profile data.

     -h      Stop the collection of profile data.

     -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.

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

     -N      Extract  the name list from the specified system instead of the de-
	     fault /boot/kernel/kernel.

     If neither -B nor -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 oper-
     ating  system profile buffers will be dumped, and profiling will be immedi-
     ately resumed.

     The profile buffers should be reset when the resolution of the profile data
     is changed.

FILES
     /boot/kernel/kernel  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
     gprof(1), config(8)

HISTORY
     The kgmon utility appeared in 4.2BSD.

FreeBSD 9.1			  June 6, 1993				KGMON(8)
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