psradm(8) — Maintenance
NAME
psradm, offline, online − Stops and starts processors in a multiprocessor system
SYNOPSIS
/usr/sbin/psradm -f [-v] [[-a] [processor_id ...]]
/usr/sbin/psradm -n [-v] [[-a] [processor_id ...]]
/usr/sbin/online [-v] [processor_id ...]
/usr/sbin/offline [-v] [processor_id ...]
DESCRIPTION
On a multiprocessor system, the psradm command puts one or more processors off line (stops a processor) or on line (starts a processor).
The processor_id variable specifies an integer that uniquely identifies a processor. Use the psrinfo command to display processor identification numbers.
The offline command puts one or more processors off line (stops a processor). If no processors are specified, all processors that are on line are stopped except the master processor.
The online command puts one or more processors on line (starts a processor). If no processors are specified, all processors that are off line are started.
Note that you cannot use these commands to start or stop the master processor in a multiprocessor system.
You must be the root user to use this command.
The /var/adm/wtmp file contains information about successful processor state transitions.
FLAGS
The following flags apply only to the psradm command:
-aSpecifies that all the processors except the master processor be put off line or on line.
-fPuts the specified processor off line.
-nPuts the specified processor on line.
The following flag applies to all forms of the command:
-vDisplays a message about the status of the operation performed on each processor.
EXAMPLES
The following command puts processors 2 and 3 off line:
# psradm -f 2 3
The following command puts all the processors on line:
# psradm -n -a
The following command puts all processors on line:
# online -v
RESTRICTION
Do not use the psradm command to disable CPUs when benchmarking performance, because the command does not provide an accurate reflection of the performance of a system that actually has fewer CPUs. Accurate performance results are obtained only when you disable the CPUs at the SRM console command level.
FILES
/var/adm/wtmp