I added a wiki page: <https://www.ipfire.org/docs/pkgs/cpupower>
Just curious about find_governor() ... how/where would the variable
"GOVERNOR" be getting configured?
Charles - If/when you make a change, please add your changes to the
above Wiki page as an example.
Jon
------ Original Message ------
From "Michael Tremer" <[email protected]>
To "Charles Brown" <[email protected]>
Cc [email protected]
Date 7/21/2025 4:10:56 AM
Subject Re: [PATCH 1/3] initscripts: Automatically enable CPU power
saving features
Hello Charles,
Thanks for your question.
The variable is by default not set. But at the top of the file, we optionally
load a configuration file. So if someone wants to hard-code a custom governor
(even if it is just for testing), they can set the variable in
/etc/sysconfig/cpupower.
-Michael
On 20 Jul 2025, at 15:05, Charles Brown <[email protected]> wrote:
Just curious about find_governor() ... how/where would the variable "GOVERNOR"
be getting configured?
On 7/17/2025 12:30 PM, Michael Tremer wrote:
This is a cleaned up implementation of the script that was previously
packaged in the cpufrequtils package.
Signed-off-by: Michael Tremer <[email protected]>
---
config/rootfiles/common/aarch64/initscripts | 2 +
config/rootfiles/common/riscv64/initscripts | 2 +
config/rootfiles/common/x86_64/initscripts | 2 +
lfs/initscripts | 1 +
src/initscripts/system/cpupower | 89 +++++++++++++++++++++
5 files changed, 96 insertions(+)
create mode 100644 src/initscripts/system/cpupower
diff --git a/config/rootfiles/common/aarch64/initscripts
b/config/rootfiles/common/aarch64/initscripts
index 1fd1f076f..fa43d4fe1 100644
--- a/config/rootfiles/common/aarch64/initscripts
+++ b/config/rootfiles/common/aarch64/initscripts
@@ -18,6 +18,7 @@ etc/rc.d/init.d/collectd
etc/rc.d/init.d/connectd
etc/rc.d/init.d/conntrackd
etc/rc.d/init.d/console
+etc/rc.d/init.d/cpupower
etc/rc.d/init.d/dhcp
etc/rc.d/init.d/dhcrelay
etc/rc.d/init.d/fcron
@@ -183,6 +184,7 @@ etc/rc.d/rcsysinit.d/S42fsresize
etc/rc.d/rcsysinit.d/S43mounttmpfs
etc/rc.d/rcsysinit.d/S44smt
etc/rc.d/rcsysinit.d/S45udev_retry
+etc/rc.d/rcsysinit.d/S46cpupower
etc/rc.d/rcsysinit.d/S50cleanfs
etc/rc.d/rcsysinit.d/S60setclock
etc/rc.d/rcsysinit.d/S70console
diff --git a/config/rootfiles/common/riscv64/initscripts
b/config/rootfiles/common/riscv64/initscripts
index 694207257..a31359134 100644
--- a/config/rootfiles/common/riscv64/initscripts
+++ b/config/rootfiles/common/riscv64/initscripts
@@ -18,6 +18,7 @@ etc/rc.d/init.d/collectd
etc/rc.d/init.d/connectd
etc/rc.d/init.d/conntrackd
etc/rc.d/init.d/console
+etc/rc.d/init.d/cpupower
etc/rc.d/init.d/dhcp
etc/rc.d/init.d/dhcrelay
etc/rc.d/init.d/fcron
@@ -182,6 +183,7 @@ etc/rc.d/rcsysinit.d/S42fsresize
etc/rc.d/rcsysinit.d/S43mounttmpfs
etc/rc.d/rcsysinit.d/S44smt
etc/rc.d/rcsysinit.d/S45udev_retry
+etc/rc.d/rcsysinit.d/S46cpupower
etc/rc.d/rcsysinit.d/S50cleanfs
etc/rc.d/rcsysinit.d/S60setclock
etc/rc.d/rcsysinit.d/S70console
diff --git a/config/rootfiles/common/x86_64/initscripts
b/config/rootfiles/common/x86_64/initscripts
index 694207257..a31359134 100644
--- a/config/rootfiles/common/x86_64/initscripts
+++ b/config/rootfiles/common/x86_64/initscripts
@@ -18,6 +18,7 @@ etc/rc.d/init.d/collectd
etc/rc.d/init.d/connectd
etc/rc.d/init.d/conntrackd
etc/rc.d/init.d/console
+etc/rc.d/init.d/cpupower
etc/rc.d/init.d/dhcp
etc/rc.d/init.d/dhcrelay
etc/rc.d/init.d/fcron
@@ -182,6 +183,7 @@ etc/rc.d/rcsysinit.d/S42fsresize
etc/rc.d/rcsysinit.d/S43mounttmpfs
etc/rc.d/rcsysinit.d/S44smt
etc/rc.d/rcsysinit.d/S45udev_retry
+etc/rc.d/rcsysinit.d/S46cpupower
etc/rc.d/rcsysinit.d/S50cleanfs
etc/rc.d/rcsysinit.d/S60setclock
etc/rc.d/rcsysinit.d/S70console
diff --git a/lfs/initscripts b/lfs/initscripts
index 99fe2f1be..49215c0ae 100644
--- a/lfs/initscripts
+++ b/lfs/initscripts
@@ -176,6 +176,7 @@ $(TARGET) :
ln -sf ../init.d/mounttmpfs /etc/rc.d/rcsysinit.d/S43mounttmpfs
ln -sf ../init.d/smt /etc/rc.d/rcsysinit.d/S44smt
ln -sf ../init.d/udev_retry /etc/rc.d/rcsysinit.d/S45udev_retry
+ ln -sf ../init.d/cpupower /etc/rc.d/rcsysinit.d/S46cpupower
ln -sf ../init.d/cleanfs /etc/rc.d/rcsysinit.d/S50cleanfs
ln -sf ../init.d/setclock /etc/rc.d/rcsysinit.d/S60setclock
ln -sf ../init.d/console /etc/rc.d/rcsysinit.d/S70console
diff --git a/src/initscripts/system/cpupower b/src/initscripts/system/cpupower
new file mode 100644
index 000000000..82b62a89b
--- /dev/null
+++ b/src/initscripts/system/cpupower
@@ -0,0 +1,89 @@
+#!/bin/sh
+###############################################################################
+#
#
+# IPFire.org - A linux based firewall
#
+# Copyright (C) 2025 IPFire Team <[email protected]>
#
+#
#
+# This program is free software: you can redistribute it and/or modify
#
+# it under the terms of the GNU General Public License as published by
#
+# the Free Software Foundation, either version 3 of the License, or
#
+# (at your option) any later version.
#
+#
#
+# This program is distributed in the hope that it will be useful,
#
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
#
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#
+# GNU General Public License for more details.
#
+#
#
+# You should have received a copy of the GNU General Public License
#
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
+#
#
+###############################################################################
+
+. /etc/sysconfig/rc
+. ${rc_functions}
+
+# Load the configuration if it exists
+if [ -r "/etc/sysconfig/cpupower" ]; then
+ . /etc/sysconfig/cpupower
+fi
+
+# This function returns which governor to use
+find_governor() {
+ local driver
+
+ # If a governor has been configured, we just use that one
+ if [ -n "${GOVERNOR}" ]; then
+ echo "${GOVERNOR}"
+ return 0
+ fi
+
+ # Determine the driver
+ if [ -r "/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver" ]; then
+ driver="$(</sys/devices/system/cpu/cpu0/cpufreq/scaling_driver)"
+ fi
+
+ # Decide which governor to use based on the driver
+ case "${driver}" in
+ # If the driver could not be detected, we won't use anything
+ "")
+ ;;
+
+ # Intel P-State only supports performace and powersave. The latter
+ # is rather implemented like ondemand in other cases.
+ intel_pstate)
+ echo "powersave"
+ ;;
+
+ # For everything else use schedutil
+ *)
+ echo "schedutil"
+ ;;
+ esac
+
+ return 0
+}
+
+set_governor() {
+ # Find the governor to use
+ local governor="$(find_governor)"
+
+ # If we could not detect a governor we don't have anything to do
+ if [ -z "${governor}" ]; then
+ return 0
+ fi
+
+ # Set the governor
+ cpupower frequency-set --governor "${governor}" >/dev/null
+}
+
+case "${1}" in
+ start)
+ boot_mesg "Enabling CPU Power Saving Features..."
+ set_governor
+ evaluate_retval
+ ;;
+ *)
+ echo "Usage: ${0} {start}"
+ exit 1
+ ;;
+esac
