KGMON(8)                OpenBSD 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.

     -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 /bsd.

     -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 re-
     mains unchanged.  For example, if the -p flag is specified and profile
     data is being collected, profiling will be momentarily suspended, the op-
     erating system profile buffers will be dumped, and profiling will be im-
     mediately resumed.

FILES
     /bsd        default system
     /dev/kmem   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 command appeared in 4.2BSD.

OpenBSD 4.7                      May 31, 2007                                1
