kgmon(8) BSD System Manager's Manual kgmon(8)
NAME
kgmon -- generate a dump of the operating system's profile buffers
SYNOPSIS
kgmon [-bhpr] [-M -core] [-N -system]
DESCRIPTION
Kgmon is a tool used when profiling the operating system. When no argu-
ments 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
produces a gmon.out file suitable for later analysis by gprof(1).
The options are as follows:
-b Resume the collection of 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
default ``/vmunix''.
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
/vmunix the default system
/dev/kmem the default memory
SEE ALSO
gprof(1), config(8)
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.
HISTORY
The kgmon command appeared in 4.2BSD.
4.2 Berkeley Distribution June 6, 1993 4.2 Berkeley Distribution
Mac OS X 10.4 - Generated Fri Apr 29 08:12:12 CDT 2005