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KGMON(8)                    System Manager's Manual                   KGMON(8)

NAME
     kgmon - generate a dump of the operating system's profile buffers

SYNOPSIS
     kgmon [-bdhpr] [-c cpuid] [-M core] [-N system]

DESCRIPTION
     kgmon is a tool 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(1)).  If the -p
     flag is specified, kgmon extracts profile data from the operating system
     and produces a gmon.out or gmon-<id>.out file suitable for later analysis
     by gprof(1).

     The options are as follows:

     -b      Resume the collection of profile data.

     -c cpuid
             Operate on the CPU specified by cpuid.  If this option is
             specified with -p, the output file name will be gmon-<id>.out
             instead of gmon.out.  And if the cpuid argument is "all" , the
             operation is performed for each cpu.

     -d      Enable debug output.

     -h      Stop the collection of profile data.

     -M core
             Extract values associated with the name list from the specified
             core instead of the default /dev/kmem.

     -N system
             Extract the name list from the specified system instead of the
             default /netbsd.

     -p      Dump the contents of the profile buffers into a gmon.out or
             gmon-<id>.out file.

     -r      Reset all the profile buffers.  If the -p flag is also specified,
             the gmon.out or gmon-<id>.out file is generated before the
             buffers are reset.

     If neither -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.

FILES
     /netbsd     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
     config(1), gprof(1)

HISTORY
     The kgmon command appeared in 4.2BSD.

NetBSD 9.99                     August 10, 2021                    NetBSD 9.99