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+.\" Darwin cpuctl man page adapted from NetBSD (credits below):
+.\"
+.\"	$NetBSD: cpuctl.8,v 1.18 2018/01/14 00:45:54 mrg Exp $
+.\"
+.\" Copyright (c) 2007, 2008, 2012, 2015 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Andrew Doran.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd March 18, 2019
+.Dt CPUCTL 8
+.Os Darwin
+.Sh NAME
+.Nm cpuctl
+.Nd program to control CPUs
+.Sh SYNOPSIS
+.Nm cpuctl
+.Ar command
+.Op Ar arguments
+.Sh DESCRIPTION
+The
+.Nm
+command can be used to control and inspect the state of CPUs in the system.
+.Pp
+The first argument,
+.Ar command ,
+specifies the action to take.
+Valid commands are:
+.Bl -tag -width offline
+.It list
+For each CPU in the system, display the current state and time of the last
+state change.
+.It offline Ar cpu Op Ar cpu ...
+Set the specified CPUs off line.
+.Pp
+At least one CPU in the system must remain on line.
+.It online Ar cpu Op Ar cpu ...
+Set the specified CPUs on line.
+.El
+.Sh EXAMPLES
+Run
+.Dl cpuctl offline 2
+and then
+.Dl cpuctl list
+The output should reflect the fact that CPU#2 was taken offline.