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Prevent sleep if CPU usage is high
November 8, 2019
Edited: June 12, 2020
September 20, 2023
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Discover your current sleep settings with this:
$ gsettings list-recursively | grep sleep org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend' org.gnome.settings-daemon.plugins.power button-sleep 'suspend' org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend'
My system is set to never go to sleep, but if yours is set for 5 minutes (300 seconds) it would look like this:
org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 300
When your python program starts issue the command:
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0
When your python program ends restore the previous settings:
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 300
Your screen saver settings are related at times:
$ gsettings list-recursively | grep top.screensaver org.gnome.desktop.screensaver picture-opacity 100 org.gnome.desktop.screensaver logout-enabled false org.gnome.desktop.screensaver lock-enabled false org.gnome.desktop.screensaver logout-delay uint32 7200 org.gnome.desktop.screensaver embedded-keyboard-enabled false org.gnome.desktop.screensaver primary-color '#023c88' org.gnome.desktop.screensaver idle-activation-enabled true org.gnome.desktop.screensaver secondary-color '#5789ca' org.gnome.desktop.screensaver logout-command '' org.gnome.desktop.screensaver color-shading-type 'solid' org.gnome.desktop.screensaver embedded-keyboard-command '' org.gnome.desktop.screensaver show-notifications false org.gnome.desktop.screensaver picture-options 'zoom' org.gnome.desktop.screensaver lock-delay uint32 0 org.gnome.desktop.screensaver show-full-name-in-top-bar true org.gnome.desktop.screensaver picture-uri 'file:///usr/share/backgrounds/gnome/adwaita-lock.jpg' org.gnome.desktop.screensaver status-message-enabled true org.gnome.desktop.screensaver ubuntu-lock-on-suspend false org.gnome.desktop.screensaver user-switch-enabled true
Edit script based on system activity
OP has clarified needs. Multiple jobs can be running. The first one that ends would reactivate sleep which will prevent remaining jobs from completing.
A scaled down version of this script is needed:
- Removing dimming / brightening of monitors
- Remove list of selective monitors to process
- Remove checks for keyboard / mouse idle (which gnome uses for sleep activation)
- Drastically reduce statistics summary screen or remove all together
Then the code using
xprintidle (keyboard and mouse unused time) needs to be yanked out and replaced with:
$ uptime 08:08:54 up 9 days, 3:38, 1 user, load average: 0.30, 0.47, 0.71
The load average prints for 1 minute, 5 minutes and 15 minutes. Once 5 minutes or 15 minutes is below threshold, simply suspend the system.
To start testing run this in a terminal now:
$ while true ; do uptime; sleep 300; done 08:20:36 up 9 days, 3:50, 1 user, load average: 0.36, 0.50, 0.64
Every five minutes the load average will display to give you an idea of where your thresholds should be to suspend.
After program has been implemented you may want to audit usage. For tracking the suspend activity (power savings?) this script can be used:
$ suspendtime Oct 31 05:55:19 to Oct 31 16:54:26 lasting 39,547 seconds (... SNIP ...) Nov 08 07:24:31 to Nov 08 09:28:44 lasting 7,453 seconds Nov 08 23:26:19 to Nov 09 07:38:50 lasting 29,551 seconds Linux uptime 791,119 seconds (9 days, 3 hours, 45 minutes, 19 seconds) 18 Suspends 494,551 seconds (5 days, 17 hours, 22 minutes, 31 seconds) Real uptime 296,568 seconds (3 days, 10 hours, 22 minutes, 48 seconds)