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freebsd-dev/usr.sbin/powerd/powerd.8

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Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.\" Copyright (c) 2005 Nate Lawson
.\" All rights reserved.
.\"
.\" 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 REGENTS 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 REGENTS 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.
.\"
.\" $FreeBSD$
.\"
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Dd March 3, 2020
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Dt POWERD 8
.Os
.Sh NAME
.Nm powerd
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.Nd "system power control utility"
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Sh SYNOPSIS
.Nm
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.Op Fl a Ar mode
.Op Fl b Ar mode
.Op Fl i Ar percent
Add -m and -M options to control the minimum and maximum frequency. PR: bin/145063 Submitted by: Boris Kochergin <spawk at acm.poly.edu> Reviewed by: cperciva Approved by: rrs (mentor) MFC after: 2 weeks
2010-08-17 09:11:38 +00:00
.Op Fl M Ar freq
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Op Fl m Ar freq
Add -N option to powerd(8) to ignore "nice" time. With powerd_flags="-N", this makes powerd(8) exclude "nice" time when computing the CPU utilization. This makes it possible to prevent CPU-intensive "background" processes from spinning up the CPU. Note that only *userland* CPU usage belonging to "nice" processes is excluded; we do not track whether time spent in the kernel is on behalf of nice or non-nice processes, so kernel-intensive nice processes can still result in the CPU being sped up. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23868
2020-02-29 22:31:23 +00:00
.Op Fl N
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.Op Fl n Ar mode
Add '-P' option which allows to specify pidfile.
2005-08-24 17:32:41 +00:00
.Op Fl P Ar pidfile
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Op Fl p Ar ival
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.Op Fl r Ar percent
powerd(8): allow to force a method of battery state query This change allows to determine power source via sysctl or /dev/apm when devd(8) is running (used by default). Based on patch from PR; other changes on top of it: - '-f' (force) -> '-s' (source) parameter renaming; - allow 'apm' -> 'devd' transition when '-s devd' is set (if APM is enabled); - man page update. Checked on amd64 with -s devd / sysctl and apm (an extra build with forced USE_APM define set was done) PR: 125707 Submitted by: Konstantin Stepanov <milezv@yandex.ru> Reviewed by: bcr, imp MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D18742
2019-01-06 02:39:03 +00:00
.Op Fl s Ar source
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Op Fl v
.Sh DESCRIPTION
The
.Nm
utility monitors the system state and sets various power control options
accordingly.
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
It offers power-saving modes that can be
individually selected for operation on AC power or batteries.
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Bl -tag -width "hiadaptive"
.It Cm maximum
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
Choose the highest performance values.
May be abbreviated as
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm max .
.It Cm minimum
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
Choose the lowest performance values to get the most power savings.
May be abbreviated as
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm min .
.It Cm adaptive
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
Attempt to strike a balance by degrading performance when the system
appears idle and increasing it when the system is busy.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
It offers a good balance between a small performance loss for greatly
increased power savings.
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
May be abbreviated as
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm adp .
.It Cm hiadaptive
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
Like
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm adaptive
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
mode, but tuned for systems where performance and interactivity are
more important than power consumption.
It increases frequency faster, reduces frequency less aggressively, and
Grammar and minor tweaks to powerd(8) man page. PR: docs/133186 Approved by: ed (mentor) MFC after: 2 weeks
2009-12-21 22:56:06 +00:00
will maintain full frequency for longer.
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
May be abbreviated as
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm hadp .
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
.El
.Pp
The default mode is
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm adaptive
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
for battery power and
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Cm hiadaptive
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
for the rest.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Pp
.Nm
Put the power modes in a list to make them easier to find. Reviewed by: joel MFC after: 1 week
2013-07-04 12:24:39 +00:00
recognizes these runtime options:
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Bl -tag -width "-r percent"
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.It Fl a Ar mode
Selects the
.Ar mode
to use while on AC power.
.It Fl b Ar mode
Selects the
.Ar mode
to use while on battery power.
.It Fl i Ar percent
Set of powerd enchancements: 1. Make it more SMP polite. Previous version uses average CPU load that often leads to load underestimation. It make powerd with default configuration unusable on systems with more then 2 CPUs. I propose to use summary load instead of average one. IMO this is the best we can do without specially tuned scheduler. Also as soon as measuring total load on SMP systems is more useful then total idle, I have switched to it. 2. Make powerd's operation independent from number and size of frequency levels. I have added internal frequency counter which translated into real frequencies only on a last stage and only as good as gone. Some systems may have only several power levels, while others - many of them, so adaptation time with previous approach was completely different. 3. As part of previous I have changed adaptive mode to rise frequency on demand up to 2 times and fall on 1/8 per time internal. 4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive". It rises frequency twice faster, drops it 4 times slower, prefers twice lower CPU load and has additional delay before leaving the highest frequency after the period of maximum load. This mode was specially made to improve interactivity of the systems where operation capabilities are more significant then power consumption, but keeping maximum frequency all the time is not needed. 5. I have reduced default polling interval from 1/2 to 1/4 of second. It is not so important for algorithm math now, but gives better system interactivity. Discussed on: mobile@
2008-11-18 13:24:38 +00:00
Specifies the CPU load percent level when adaptive
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
mode should begin to degrade performance to save power.
Set of powerd enchancements: 1. Make it more SMP polite. Previous version uses average CPU load that often leads to load underestimation. It make powerd with default configuration unusable on systems with more then 2 CPUs. I propose to use summary load instead of average one. IMO this is the best we can do without specially tuned scheduler. Also as soon as measuring total load on SMP systems is more useful then total idle, I have switched to it. 2. Make powerd's operation independent from number and size of frequency levels. I have added internal frequency counter which translated into real frequencies only on a last stage and only as good as gone. Some systems may have only several power levels, while others - many of them, so adaptation time with previous approach was completely different. 3. As part of previous I have changed adaptive mode to rise frequency on demand up to 2 times and fall on 1/8 per time internal. 4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive". It rises frequency twice faster, drops it 4 times slower, prefers twice lower CPU load and has additional delay before leaving the highest frequency after the period of maximum load. This mode was specially made to improve interactivity of the systems where operation capabilities are more significant then power consumption, but keeping maximum frequency all the time is not needed. 5. I have reduced default polling interval from 1/2 to 1/4 of second. It is not so important for algorithm math now, but gives better system interactivity. Discussed on: mobile@
2008-11-18 13:24:38 +00:00
The default is 50% or lower.
Add -m and -M options to control the minimum and maximum frequency. PR: bin/145063 Submitted by: Boris Kochergin <spawk at acm.poly.edu> Reviewed by: cperciva Approved by: rrs (mentor) MFC after: 2 weeks
2010-08-17 09:11:38 +00:00
.It Fl M Ar freq
Specifies the maximum frequency to throttle up to.
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.It Fl m Ar freq
Specifies the minimum frequency to throttle down to.
Add -N option to powerd(8) to ignore "nice" time. With powerd_flags="-N", this makes powerd(8) exclude "nice" time when computing the CPU utilization. This makes it possible to prevent CPU-intensive "background" processes from spinning up the CPU. Note that only *userland* CPU usage belonging to "nice" processes is excluded; we do not track whether time spent in the kernel is on behalf of nice or non-nice processes, so kernel-intensive nice processes can still result in the CPU being sped up. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23868
2020-02-29 22:31:23 +00:00
.It Fl N
Treat "nice" time as idle for the purpose of load calculation;
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
i.e., do not increase the CPU frequency if the CPU is only busy
Add -N option to powerd(8) to ignore "nice" time. With powerd_flags="-N", this makes powerd(8) exclude "nice" time when computing the CPU utilization. This makes it possible to prevent CPU-intensive "background" processes from spinning up the CPU. Note that only *userland* CPU usage belonging to "nice" processes is excluded; we do not track whether time spent in the kernel is on behalf of nice or non-nice processes, so kernel-intensive nice processes can still result in the CPU being sped up. MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23868
2020-02-29 22:31:23 +00:00
with "nice" processes.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.It Fl n Ar mode
Selects the
.Ar mode
to use normally when the AC line state is unknown.
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.It Fl P Ar pidfile
Specifies an alternative file in which the process ID should be stored.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.It Fl p Ar ival
Specifies a different polling interval (in milliseconds) for AC line state
and system idle levels.
Set of powerd enchancements: 1. Make it more SMP polite. Previous version uses average CPU load that often leads to load underestimation. It make powerd with default configuration unusable on systems with more then 2 CPUs. I propose to use summary load instead of average one. IMO this is the best we can do without specially tuned scheduler. Also as soon as measuring total load on SMP systems is more useful then total idle, I have switched to it. 2. Make powerd's operation independent from number and size of frequency levels. I have added internal frequency counter which translated into real frequencies only on a last stage and only as good as gone. Some systems may have only several power levels, while others - many of them, so adaptation time with previous approach was completely different. 3. As part of previous I have changed adaptive mode to rise frequency on demand up to 2 times and fall on 1/8 per time internal. 4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive". It rises frequency twice faster, drops it 4 times slower, prefers twice lower CPU load and has additional delay before leaving the highest frequency after the period of maximum load. This mode was specially made to improve interactivity of the systems where operation capabilities are more significant then power consumption, but keeping maximum frequency all the time is not needed. 5. I have reduced default polling interval from 1/2 to 1/4 of second. It is not so important for algorithm math now, but gives better system interactivity. Discussed on: mobile@
2008-11-18 13:24:38 +00:00
The default is 250 ms.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.It Fl r Ar percent
Set of powerd enchancements: 1. Make it more SMP polite. Previous version uses average CPU load that often leads to load underestimation. It make powerd with default configuration unusable on systems with more then 2 CPUs. I propose to use summary load instead of average one. IMO this is the best we can do without specially tuned scheduler. Also as soon as measuring total load on SMP systems is more useful then total idle, I have switched to it. 2. Make powerd's operation independent from number and size of frequency levels. I have added internal frequency counter which translated into real frequencies only on a last stage and only as good as gone. Some systems may have only several power levels, while others - many of them, so adaptation time with previous approach was completely different. 3. As part of previous I have changed adaptive mode to rise frequency on demand up to 2 times and fall on 1/8 per time internal. 4. For desktop (AC-powered) systems I have added one more mode - "hiadaptive". It rises frequency twice faster, drops it 4 times slower, prefers twice lower CPU load and has additional delay before leaving the highest frequency after the period of maximum load. This mode was specially made to improve interactivity of the systems where operation capabilities are more significant then power consumption, but keeping maximum frequency all the time is not needed. 5. I have reduced default polling interval from 1/2 to 1/4 of second. It is not so important for algorithm math now, but gives better system interactivity. Discussed on: mobile@
2008-11-18 13:24:38 +00:00
Specifies the CPU load percent level where adaptive
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
mode should consider the CPU running and increase performance.
Fix a typo higter->higher. Spotted by: ganbold
2008-12-24 09:17:30 +00:00
The default is 75% or higher.
powerd(8): allow to force a method of battery state query This change allows to determine power source via sysctl or /dev/apm when devd(8) is running (used by default). Based on patch from PR; other changes on top of it: - '-f' (force) -> '-s' (source) parameter renaming; - allow 'apm' -> 'devd' transition when '-s devd' is set (if APM is enabled); - man page update. Checked on amd64 with -s devd / sysctl and apm (an extra build with forced USE_APM define set was done) PR: 125707 Submitted by: Konstantin Stepanov <milezv@yandex.ru> Reviewed by: bcr, imp MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D18742
2019-01-06 02:39:03 +00:00
.It Fl s Ar source
Enforces method for AC line state refresh; by default, it is chosen
automatically.
The set of valid methods is
.Cm sysctl , devd
and
.Cm apm
(i386 only).
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.It Fl v
Verbose mode.
Messages about power changes will be printed to stdout and
.Nm
will operate in the foreground.
.El
powerd.8: Improve style & fix typos - Sort options. - Do not use macros (like .Ar) to specify width for Bl (macros within that string are not expanded). - Use Cm instead of Ar for mode names. - Fix some typos reported by mandoc. - Move the documentation of the PID file from the -P flag description to the FILES section. Approved by: bcr (mentor) Differential Revision: https://reviews.freebsd.org/D23941
2020-03-03 13:25:08 +00:00
.Sh FILES
.Bl -tag -width "/var/run/powerd.pid"
.It Pa /var/run/powerd.pid
The default PID file.
.El
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr apm 4 ,
.Xr cpufreq 4
.Sh HISTORY
The
.Nm
utility first appeared in
s/5.5/6.0/ in HISTORY section. Discussed with: ru
2005-11-24 09:25:10 +00:00
.Fx 6.0 .
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Sh AUTHORS
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.An -nosplit
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.An Colin Percival
first wrote
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
.Nm estctrl ,
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
the utility that
.Nm
is based on.
.An Nate Lawson
then updated it for
.Xr cpufreq 4 ,
man page -> manual page
2005-02-27 15:49:07 +00:00
added features, and wrote this manual page.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Sh BUGS
The
.Nm
utility should also power down idle disks and other components besides the CPU.
.Pp
If
.Nm
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
is used with
.Pa power_profile ,
they may override each other.
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Pp
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
The
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
.Nm
Fixed markup. Approved by: re
2005-06-16 20:01:43 +00:00
utility
Import powerd(8), a utility for managing power consumption. Currently, it just uses cpufreq(4) but in the future it should also do things like spin down disks. This is based on the work by Colin Percival (called "estctrl").
2005-02-26 21:17:31 +00:00
should probably use the
.Xr devctl 4
interface instead of polling for AC line state.
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