83 lines
2.8 KiB
Groff
83 lines
2.8 KiB
Groff
.\" $NetBSD: cpuctl.8,v 1.6 2008/06/22 14:50:40 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 2007, 2008 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 June 22, 2008
|
|
.Dt CPUCTL 8
|
|
.Os
|
|
.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 XofflineXcpunoX
|
|
.It identify Ar cpu
|
|
Output information on the specified CPU's features and capabilities.
|
|
Not available on all architectures.
|
|
.It list
|
|
For each CPU in the system, display the current state and time of the last
|
|
state change.
|
|
.It offline Ar cpuno
|
|
Set the specified CPU off line.
|
|
.Pp
|
|
Unbound LWPs (lightweight processes) will not be executed on the CPU
|
|
while it is off line.
|
|
Bound LWPs will continue to be executed on the CPU, and device interrupts
|
|
routed to the CPU will continue to be handled.
|
|
A future release of the system may allow device interrupts to be re-routed
|
|
away from individual CPUs.
|
|
.Pp
|
|
At least one CPU in the system must remain on line.
|
|
.It online Ar cpuno
|
|
Set the specified CPU on line, making it available to run unbound LWPs.
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/cpuctl -compact
|
|
.It Pa /dev/cpuctl
|
|
control device
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr psrset 8 ,
|
|
.Xr schedctl 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
command first appeared in
|
|
.Nx 5.0 .
|