NAME
kgmon —
generate a dump of the operating
system's profile buffers
SYNOPSIS
kgmon |
[-Bbhpr] [-M
core] [-N
system] |
DESCRIPTION
Thekgmon utility is used when profiling the operating
system. When no arguments are supplied, kgmon
indicates the state of operating system profiling 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 high resolution profile data.
-b- Resume the collection of low resolution 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
-pflag 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 /boot/kernel/kernel.
If neither -B nor
-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.
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
HISTORY
The kgmon utility appeared in
4.2BSD.