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gnu: Add powertop-service-type.

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* gnu/services/pm.scm (powertop-shepherd-service)
(powertop-service-type, powertop-configuration): New variables.
* doc/guix.texi (Power Management Services): Document powertop-service-type.

Change-Id: I1c5ef855526458ad54f62ca6e755da82acce1c4a
Signed-off-by: Ludovic Courtès <ludo@gnu.org>
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Ian Eure 2024-06-01 11:15:49 -07:00 committed by Ludovic Courtès
parent 2b8d612f4e
commit ea5ee89274
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2 changed files with 67 additions and 1 deletions
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26
doc/guix.texi
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@ -35800,6 +35800,32 @@ Ignore cpuid check for supported CPU models.
@item @code{thermald} (default: @var{thermald})
Package object of thermald.
@cindex PowerTOP
@cindex power consumption tuning with PowerTOP
@subsubheading PowerTOP
The @code{(gnu services pm)} module also provides a service definition
for @uref{https://01.org/powertop/, PowerTOP}, a power consumption
analysis and tuning tool. When started, it tunes Linux kernel settings
to reduce power consumption.
@defvar powertop-service-type
The service type for PowerTOP. No configuration is necessary. When the
service starts, it executes @code{powertop --auto-tune}.
@lisp
(service powertop-service-type)
@end lisp
@end defvar
Available @code{powertop-configuration} fields are:
@deftypevr {@code{powertop-configuration} parameter} package powertop
The PowerTOP package. Defaults to @code{powertop} in the @code{(gnu
packages linux)} module
@end deftypevr
@end table
@end deftp

42
gnu/services/pm.scm
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@ -1,6 +1,7 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2024 Dariqq <dariqq@posteo.net>
;;; Copyright © 2024 Ian Eure <ian@retrospec.tv>
;;;
;;; This file is part of GNU Guix.
;;;
@ -18,6 +19,8 @@
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu services pm)
#:use-module (srfi srfi-1)
#:use-module (ice-9 match)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module (guix records)
@ -37,7 +40,10 @@ (define-module (gnu services pm)
tlp-configuration
thermald-configuration
thermald-service-type))
thermald-service-type
powertop-configuration
powertop-service-type))
;;;
;;; power-profiles-daemon
@ -525,3 +531,37 @@ (define thermald-service-type
(default-value (thermald-configuration))
(description "Run thermald, a CPU frequency scaling service that helps
prevent overheating.")))
;;;
;;; powertop
;;;
;;; Calls `powertop --auto-tune' to reduce energy consumption.
(define-configuration powertop-configuration
(powertop (package powertop) "PowerTOP package to use."))
(define powertop-shepherd-service
(match-lambda
(($ <powertop-configuration> powertop)
(shepherd-service
(documentation "Tune kernel power settings at boot.")
(provision '(powertop powertop-auto-tune))
(requirement '(user-processes))
(one-shot? #t)
(start #~(lambda _
(zero? (system* #$(file-append powertop "/sbin/powertop")
"--auto-tune"))))))))
(define powertop-service-type
(service-type
(name 'powertop)
(extensions
(list
(service-extension shepherd-root-service-type
(compose list powertop-shepherd-service))))
(compose concatenate)
(default-value (powertop-configuration))
(description "Tune power-related kernel parameters to reduce energy
consumption.")))