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.

     -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 /bsd.

     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

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.

OpenBSD 3.0                      June 6, 1993                                1
