Battery Life: Idle Power Usage - junaruga/framework-laptop-config GitHub Wiki
This note is to tune idle power usage by PowerTOP and TLP. It is checked on Fedora Linux 35. I referred the Framework community's this thread.
Install
Install PowerTop.
$ sudo dnf install powertop
$ rpm -q powertop
powertop-2.14-2.fc35.x86_64
You see the powertop has a systemd service.
$ rpm -ql powertop | grep systemd
/usr/lib/systemd/system/powertop.service
$ systemctl list-unit-files | grep powertop
powertop.service disabled disabled
$ sudo systemctl enable powertop
$ systemctl -a | grep powertop
powertop.service loaded inactive dead PowerTOP autotuner
Install TLP. You can see TLP's installation document on Fedora.
$ sudo dnf install tlp tlp-rdw
$ rpm -q tlp tlp-rdw
tlp-1.4.0-2.fc35.noarch
tlp-rdw-1.4.0-2.fc35.noarch
You see the powertop also has a systemd service.
$ rpm -ql tlp | grep systemd
/usr/lib/systemd/system-preset/50-tlp.preset
/usr/lib/systemd/system-sleep
/usr/lib/systemd/system-sleep/tlp
/usr/lib/systemd/system/tlp.service
$ systemctl list-unit-files | grep tlp
tlp.service enabled enabled
Edit /etc/tlp.conf. Add the line PCIE_ASPM_ON_BAT=powersupersave as below.
$ cd /etc
$ sudo cp -p tlp.conf tlp.conf.org
$ sudo vi tlp.conf
$ diff -u tlp.conf.org tlp.conf
--- tlp.conf.org 2021-10-05 17:51:20.000000000 +0200
+++ tlp.conf 2021-12-31 21:53:38.867100574 +0100
@@ -342,6 +342,7 @@
#PCIE_ASPM_ON_AC=default
#PCIE_ASPM_ON_BAT=default
+PCIE_ASPM_ON_BAT=powersupersave
# Runtime Power Management for PCIe bus devices: on=disable, auto=enable.
# Default: on (AC), auto (BAT)
Note perhaps I should set the setting below to disable USB auto suspend.
USB_AUTOSUSPEND=0
$ sudo systemctl start tlp
$ systemctl status tlp
● tlp.service - TLP system startup/shutdown
Loaded: loaded (/usr/lib/systemd/system/tlp.service; enabled; vendor preset: enabled)
Active: active (exited) since Fri 2021-12-31 21:56:04 CET; 4s ago
Docs: https://linrunner.de/tlp
Process: 17566 ExecStart=/usr/sbin/tlp init start (code=exited, status=0/SUCCESS)
Main PID: 17566 (code=exited, status=0/SUCCESS)
CPU: 145ms
Note I needed to executed the commands below too, as the journalctl -f complained. The tlp conflicts with the power-profiles-daemon. See the first comment on the thread.
$ sudo systemctl mask power-profiles-daemon.service
Created symlink /etc/systemd/system/power-profiles-daemon.service → /dev/null.
$ sudo systemctl mask systemd-rfkill.service
Created symlink /etc/systemd/system/systemd-rfkill.service → /dev/null.
Start PowerTop too.
$ sudo systemctl start powertop
The "Active" status is "inactive (dead)". According to the message "To show power estimates do 337 measurement(s) connected to battery only" and this page, do I need to wait more to get the enough info about the battery?
$ systemctl status powertop
○ powertop.service - PowerTOP autotuner
Loaded: loaded (/usr/lib/systemd/system/powertop.service; enabled; vendor preset: disabled)
Active: inactive (dead) since Sun 2022-01-02 15:05:30 CET; 8min ago
Process: 6680 ExecStart=/usr/sbin/powertop --auto-tune (code=exited, status=0/SUCCESS)
Main PID: 6680 (code=exited, status=0/SUCCESS)
CPU: 297ms
Jan 02 15:05:29 fedora powertop[6680]: RAPL device for cpu 0
Jan 02 15:05:29 fedora powertop[6680]: RAPL Using PowerCap Sysfs : Domain Mask d
Jan 02 15:05:29 fedora powertop[6680]: RAPL device for cpu 0
Jan 02 15:05:29 fedora powertop[6680]: RAPL Using PowerCap Sysfs : Domain Mask d
Jan 02 15:05:29 fedora powertop[6680]: Devfreq not enabled
Jan 02 15:05:29 fedora powertop[6680]: glob returned GLOB_ABORTED
Jan 02 15:05:30 fedora powertop[6680]: Leaving PowerTOP
Jan 02 15:05:30 fedora powertop[6680]: To show power estimates do 337 measurement(s) connected to battery only
Jan 02 15:05:30 fedora systemd[1]: powertop.service: Deactivated successfully.
Jan 02 15:05:30 fedora systemd[1]: Finished PowerTOP autotuner.
Check the report
Interactive mode
You can run the powertop with interactive mode like this. The interface is like top command.
$ sudo powertop
PowerTOP 2.14 Overview Idle stats Frequency stats Device stats Tunables WakeUp
The battery reports a discharge rate of 7.61 W
The energy consumed was 152 J
The estimated remaining time is 6 hours, 2 minutes
Summary: 1322.2 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and 16.5% CPU use
Usage Events/s Category Description
4.5 ms/s 355.6 Timer tick_sched_timer
5.2 ms/s 191.7 Interrupt [30] i2c_designware.
...
Text (CSV) report
$ cd /path/to/work_dir
$ sudo powertop --csv
modprobe cpufreq_stats failedLoaded 228 prior measurements
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask d
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask d
Devfreq not enabled
glob returned GLOB_ABORTED
Preparing to take measurements
To show power estimates do 129 measurement(s) connected to battery only
Taking 1 measurement(s) for a duration of 20 second(s) each.
PowerTOP outputting using base filename powertop.csv
$ grep '^The battery reports a discharge rate of:' powertop.csv
The battery reports a discharge rate of: 5.72 W;
HTML report
You can get a report from powertop.
$ cd /path/to/work_dir
$ sudo powertop --html
modprobe cpufreq_stats failedLoaded 229 prior measurements
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask d
RAPL device for cpu 0
RAPL Using PowerCap Sysfs : Domain Mask d
Devfreq not enabled
glob returned GLOB_ABORTED
Preparing to take measurements
To show power estimates do 128 measurement(s) connected to battery only
Taking 1 measurement(s) for a duration of 20 second(s) each.
PowerTOP outputting using base filename powertop.html
Check the report.
$ firefox powertop.html