kgmon(8) - NetBSD Manual Pages

KGMON(8)                NetBSD 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 ``/netbsd''.

     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

     /netbsd     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.

NetBSD 1.5                       June 6, 1993                                1