svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
poweradm(8)
poweradm(8) System Administration Commands poweradm(8)
NAME
poweradm - manage power management properties
SYNOPSIS
poweradm [-v] get [-a all|smf|platform|current] property ...
poweradm [-v] set property=value ...
poweradm [-v] list
poweradm show
poweradm -?
DESCRIPTION
The poweradm program is used to display and manage the Power Management
settings within a Solaris instance.
The Power Management properties and their values are stored in the ser‐
vice management facility (see smf(7)).
All users can run the list, get, and show forms given in the SYNOPSIS.
These commands allow all users to view the current Power Management
settings within a Solaris instance.
Only users and roles that belong to the Maintenance and Repair RBAC
profile can execute the set form of poweradm given in the SYNOPSIS. See
also the NOTES section below.
poweradm supports the following service property:
administrative-authority
The value for this property is specified as a string and can have the
values:
o smf
o platform
o none
The default value is platform. The significance of this property is the
source of administrative control for power management within the So‐
laris kernel. That is, this property indicates the origin of time-to-
full-capacity and time-to-minimum-responsiveness settings within the
Solaris kernel. Only a Solaris user with appropriate privileges can set
this property.
When the administrative-authority is set to platform the values of
time-to-full-capacity and time-to-minimum-responsiveness will be taken
from the platform code. Setting these values in SMF, using the poweradm
command will have no effect upon the values in the kernel. The poweradm
list command will indicate that the kernel is currently using the plat‐
form values. As these values are changed by the platform administrator,
so they will be modified in the kernel. Also, commands to enable or
disable the power management within the Solaris kernel will come from
the platform code. On systems that run virtual machines, the hypervisor
or virtual machine manager can be the source of this property.
When the administrative-authority is set to smf, the values of time-to-
full-capacity and time-to-minimum-responsiveness will be taken from
SMF. As these values in SMF are changed by the Solaris administrator,
they will be applied to the kernel. Setting these values in the plat‐
form will have no effect upon the values in the kernel while adminis‐
trative-authority is set to smf. Under this condition, the poweradm
command will indicate that the kernel is currently using the values
from SMF. As these values are changed by the Solaris administrator,
they will be modified in the kernel.
When the administrative-authority is set to none, power management
within the Solaris kernel will be turned off, although the power ser‐
vice will continue to run. Any power management instructions from the
platform will be ignored, as will the settings in SMF. Only when admin‐
istrative-authority is set to one of the other values will power man‐
agement within the Solaris kernel restart, using the settings from the
specified source.
time-to-full-capacity
Specified in microseconds.
This parameter constrains the dynamic capacity adjustment allowed
while the system is in an active state.
This parameter defines the maximum time the system is allowed to
reach (re-provision and make available) its full capacity, return‐
ing from any lower-capacity/less-responsive state, while it has
been using any or all of the power management features falling
within this bound.
By default, this value is taken from the platform (for example,
i86pc), because the default setting for administrative-authority is
set to platform.
Alternatively, if administrative-authority is set to smf, this
value is taken from the definition provided by the power service
(that is, SMF). At install time this value is set to be undefined.
If the Solaris administrator chooses to modify this property, a
value appropriate to the needs of the workload or applications must
be picked.
time-to-minimum-responsiveness
Specified in milliseconds.
This parameter constrains the dynamic capacity adjustment allowed
while the system is in an inactive state.
This parameter defines how long the system is allowed to return to
its active state—that is, to provide the minimum capacity required
to meet the above time-to-full-capacity constraint.
Moderate values (seconds) allow hardware components or subsystems
on the platform to be placed in slower-response inactive states;
larger values still (for example, 30 seconds to minutes) allow for
such as whole system suspension, using techniques such as suspend-
to-RAM.
By default, this value is taken from the platform (for example,
i86pc), because the default setting for administrative-authority is
set to platform.
Alternatively, if administrative-authority is set to smf, this
value is taken from the definition provided by the power service
(that is, SMF). At install time this value is set to be undefined.
If the Solaris administrator chooses to modify this property, a
value appropriate to the needs of the workload or applications must
be picked.
suspend-enable
By default no machine running Solaris is permitted to attempt a
suspend operation. Setting this property to true will permit a sus‐
pend operation to be attempted. The value of administrative-author‐
ity has no effect upon this property.
platform-disabled
This property cannot be changed by the poweradm command. The value
of platform-disabled can be viewed by running the list subcommand.
If set to true and administrative-authority is set to platform,
power management has been disabled by the platform. If set to
false, control of power management will be through the values of
the other properties, described above. The output of the show sub‐
command will display the values of these properties. On systems
that run virtual machines, the hypervisor or virtual machine man‐
ager can be the source of platform-disabled. The default value for
platform-disabled is false.
OPTIONS
The following options are supported.
-?
Display a synopsis of available subcommands and options.
-v
Provide verbose output. Can be used with any of the subcommands
listed below.
SUB-COMMANDS
The following subcommands are supported:
get [-a all|smf|platform|current]
Retrieves the current value of the named property. The -a option
can be used to indicate the origin of the value either: SMF (smf),
the platform (platform), the current value used by the kernel (cur‐
rent) or all of the preceding (all). By default, if no origin is
specified then current is assumed.
The administrative-authority and suspend-enable properties do not
have a platform value.
set property=value...
Changes the named property to the given value. The properties ad‐
ministrative-authority and suspend-enable are automatically syn‐
chronized to the new value in the kernel. The properties time-to-
full-capacity and time-to-minimum-responsiveness are synchronized
to the kernel if and only if administrative-authority is set to
smf. If the -v option is used and the kernel cannot be updated im‐
mediately because administrative-authority is not set to smf, a
warning message will be issued.
Only users and roles that belong to the Maintenance and Repair RBAC
profile can execute the set subcommand.
list
Lists all the available Power Management properties values and in‐
dicate whether power management is active.
show
Output human readable text that indicates whether the platform or
the Solaris instance is controlling power management, whether power
management is enabled, and, if it is enabled, the values of time-
to-full-capacity and time-to-minimum-responsiveness.
EXAMPLES
Example 1 Setting Platform to Control Power Management
The following command sets the platform to control power management.
# poweradm set administrative-authority=platform
Example 2 Disabling Power Management
The following command disables power management.
# poweradm set administrative-authority=none
Example 3 Setting Useful Parameters
The following sequence of commands sets time-to-full-capacity to 300
microseconds, sets time-to-minimum-responsiveness to 500 milliseconds,
and informs the Solaris instance of the new values.
# poweradm set time-to-full-capacity=300
# poweradm set time-to-minimum-responsiveness=500
# poweradm set administrative-authority=smf
Example 4 Disabling Suspend and Resume
The following command disables suspend and resume.
# poweradm set suspend-enable=false
Example 5 Listing Power Management Properties
The following command lists all available power management properties.
# poweradm list
Example 6 Obtaining Value of a Property
The following command shows the current value of time-to-full-capacity.
# poweradm get time-to-full-capacity
Example 7 Showing Value of a Property as Set by Platform
The following command retrieves the value of time-to-full-capacity set
by the platform.
# poweradm get -a platform time-to-full-capacity
Note that this will only be the same as current value if administra‐
tive-authority has been set to platform. See the explanation of the ad‐
ministrative-authority property, above.
Example 8 Showing Value of a Property as Set by Solaris Instance
The following command retrieves the value of time-to-full-capacity set
by the Solaris instance.
# poweradm get -a smf time-to-full-capacity
Note that this will only be the same as current value if administra‐
tive-authority has been set to smf. See the explanation of the adminis‐
trative-authority property, above.
Example 9 Invoking show Subcommand
The following example commands illustrate the four possible contexts in
which poweradm show can be invoked.
The following command is invoked when power management has been dis‐
abled by the platform.
# poweradm show
Power management is disabled with the hardware platform as the authority
The following command is invoked when power management has been dis‐
abled by the Solaris administrator.
# poweradm show
Power management is disabled with the Solaris instance as the authority
The following command is invoked when power management has been enabled
by the platform.
# poweradm show
Power management is enabled with the hardware platform as the authority
time-to-full-capacity 300 microseconds
time-to-minimum-responsiveness 500 milliseconds
The following command is invoked when power management has been enabled
by the Solaris instance.
# poweradm show
Power management is enabled with the Solaris instance as the authority
time-to-full-capacity 300 microseconds
time-to-minimum-responsiveness 500 milliseconds
EXIT STATUS
0 Successful completion.
1 An error occurred.
2 Invalid command line options were specified.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Availabilitysystem/kernel/power _ Interface Stability‐
Committed
SEE ALSO
attributes(7), smf(7), smf_security(7)
NOTES
The power service is managed by the service management facility,
smf(7), under the service identifier:
svc:/system/power:default
The properties that can be set by poweradm are defined in that service
as:
o active_control/administrative-authority, which is described
under administrative-authority above
o active_config/time-to-full-capacity, which is described un‐
der time-to-full-capacity above
o active_config/time-to-minimum-responsiveness, which is de‐
scribed under time-to-minimum-responsiveness above
o suspend/suspend-enable, which is described under suspend-en‐
able above
If the service is disabled, no power management settings will be up‐
loaded to the kernel in the future. Existing settings will not be un‐
done until the next reboot. Disabling all power management is best ac‐
complished by setting administrative-authority to none.
If administrative-authority is set to the value smf before both time-
to-full-capacity and time-to-minimum-responsiveness have been set, the
service will go into maintenance mode. In such a situation, set admin‐
istrative-authority to the value none then set both time-to-full-capac‐
ity and time-to-minimum-responsiveness to the values you want, clear
the service and then set administrative-authority to smf.
To set properties in the active_config and suspend property groups, the
solaris.smf.value.power_config authorization is required. To set prop‐
erties in the active_control property group the so‐
laris.smf.value.power_control authorization is required. Both of these
authorizations are part of the Maintenance and Repair profile.
Oracle Solaris 11.4 23 Jun 2025 poweradm(8)