IRQ/9-acpi CPU usage #904
Description
I found that when my laptop is idle, about 3-4% of the CPU usage is the process irq/9-acpi which appears only when auto-cpufreq is active. I confirmed that suspending and restarting the systemd daemon.
A quick investigation with an LLM suggested to try configuring auto-cpufreq to use a shorter polling time, but as far I can tell, I couldn't find any ways to do it.
I would like to first confirm that it is indeed a known auto-cpufreq issue, and if so, how to address it.
Below the output of the debug info on my system from auto-cpufreq..
### System information:
-------------------------------- Battery Info ---------------------------------
battery count = 1
BAT0 start threshold = b'75\n'
BAT0 stop threshold = b'80\n'
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Linux distro: Debian GNU/Linux 13 trixie
Linux kernel: 6.16.3+deb13-amd64
Processor: Intel(R) Core(TM) Ultra 7 258V
Cores: 8
Architecture: x86_64
Driver: intel_pstate
------------------------------ Current CPU stats ------------------------------
CPU max frequency: 2200 MHz
CPU min frequency: 400 MHz
Core Usage Temperature Frequency
CPU0 1.0% 36 °C 1372 MHz
CPU1 1.0% 37 °C 1069 MHz
CPU2 1.0% 36 °C 1444 MHz
CPU3 0.0% 35 °C 1372 MHz
CPU4 1.0% 36 °C 1651 MHz
CPU5 1.0% 36 °C 400 MHz
CPU6 1.0% 36 °C 1660 MHz
CPU7 0.0% 36 °C 400 MHz
CPU fan speed: 0 RPM
CPU fan speed: 0 RPM
auto-cpufreq version: 2.6.0
Python: 3.13.5
psutil package: 7.0.0
platform package: 1.0.8
click package: 8.3.1
distro package: 1.9.0
Computer type: Notebook
Battery is: discharging
auto-cpufreq system resource consumption:
cpu usage: 0.0 %
memory use: 0.14 %
Total CPU usage: 1.5 %
Total system load: 1.52
Average temp. of all cores: 36.00 °C
Currently using: powersave governor
Currently turbo boost is: off
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