kgmon - generate a dump of the operating system's profile
kgmon [-bhpr] [-M core] [-N system]
kgmon is a tool used when profiling the operating system.
When no arguments
are supplied, kgmon indicates the state of operating
as ``running'', ``off'', or ``not configured'' (see config(8)). If
the -p flag is specified, kgmon extracts profile data from
system and produces a gmon.out file suitable for later analysis by
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
-r Reset all the profile buffers. If the -p flag is
the gmon.out file is generated before the buffers
-M Extract values associated with the name list from
core instead of the default /dev/kmem.
-N Extract the name list from the specified system instead of the
If neither -b nor -h is specified, the state of profiling
unchanged. For example, if the -p flag is specified
data is being collected, profiling will be momentarily suspended, the operating
system profile buffers will be dumped, and profiling
will be immediately
/bsd default system
/dev/kmem default memory
Users with only read permission on /dev/kmem cannot change
the state of
profiling collection. They can get a gmon.out file with the
the data may be inconsistent if profiling is in progress.
The kgmon command appeared in 4.2BSD.
OpenBSD 3.6 June 6, 1993
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