@@ -35375,6 +35375,31 @@ Ignore cpuid check for supported CPU models.
@item @code{thermald} (default: @var{thermald})
Package object of thermald.
+@cindex powertop
+@cindex Power tuning with PowerTOP
+@subsubheading PowerTOP
+
+The @code{(gnu services pm)} module provides a Guix service definition
+for PowerTOP. When started, it tunes 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
@@ -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
@@ -524,3 +530,37 @@ (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.")))