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 sys

tem. When no
arguments are supplied, kgmon indicates the state of operat

ing system
profiling as running, off, or not configured. (see con

fig(8)) If the -p
flag is specified, kgmon extracts profile data from the op

erating system
and produces a gmon.out file suitable for later analysis by

gprof(1).

The options are as follows:

-B Resume the collection of high resolution profile da

ta.

-b Resume the collection of low resolution profile da

ta.

-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 in

stead of the

default /boot/kernel/kernel.

If neither -B nor -b nor -h is specified, the state of pro

filing collection remains unchanged. For example, if the -p flag is

specified and
profile data is being collected, profiling will be momentar

ily suspended,
the operating system profile buffers will be dumped, and

profiling will
be immediately 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.

BSD June 6, 1993

BSD