https://bugs.kde.org/show_bug.cgi?id=520805
Bug ID: 520805
Summary: High CPU usage with system monitor widget on desktop
Classification: Plasma
Product: plasmashell
Version First 6.6.90
Reported In:
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: System Monitor widgets
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: 1.0
Created attachment 192722
--> https://bugs.kde.org/attachment.cgi?id=192722&action=edit
perf capture, viewable using hotspot
DESCRIPTION
Having a system monitor widget on the desktop showing temperatures noticeably
increases plasma CPU usage.
Note that Removing the widget doesn't lower the CPU usage, plasmashell needs to
be restarted. Adding the widget does immediately increase CPU usage.
Possibly same root cause as https://bugs.kde.org/show_bug.cgi?id=515741 . When
profiling systemmonitor, the flamegraph looks similar.
STEPS TO REPRODUCE
1. Add system monitor widget to the desktop
2. Select a temperature sensor (bar chart)
3. watch htop -F plasmashell
OBSERVED RESULT
Difference in CPU usage is visible. In my case, with 1 sensor it jumped to ~10%
constant.
EXPECTED RESULT
Almost no impact on CPU usage
SOFTWARE/OS VERSIONS
Operating System: Gentoo 2.18
KDE Plasma Version: 6.6.90
KDE Frameworks Version: 6.26.0
Qt Version: 6.11.1
Kernel Version: 7.0.10-gentoo-dist-hardened (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen AI 9 HX 370 w/ Radeon 890M
Memory: 64 GiB of RAM (62.1 GiB usable)
Graphics Processor: AMD Radeon 890M Graphics
Manufacturer: Framework
Product Name: Laptop 13 (AMD Ryzen AI 300 Series)
System Version: A9
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