Copyright (c) 2007 The NetBSD Foundation, Inc.
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.Dd August 3, 2007 .Dt CPUCTL 8 .Os .Sh NAME .Nm cpuctl .Nd a 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.
p The first argument, .Ar command , specifies the action to take. Valid commands are: l -tag -width xx t list
p For each CPU in the system, display the current state and time of the last state change. t offline Ar cpuno
p Set the specified CPU off line.
p 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.
p At least one CPU in the system must remain on line. t online Ar cpuno
p Set the specified CPU on line, making it available to run unbound LWPs. .El
p .Sh FILES l -tag -width /dev/cpuctl -compact t Pa /dev/cpuctl control device .El .Sh HISTORY The .Nm command first appeared in .Nx 5.0 .