https://bugs.kde.org/show_bug.cgi?id=479321
Bug ID: 479321
Summary: Poor responsiveness of System Monitor under heavy CPU
and IO load
Classification: Plasma
Product: plasmashell
Version: master
Platform: Compiled Sources
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: System Monitor
Assignee: plasma-b...@kde.org
Reporter: bizy...@zoho.com
CC: ahiems...@heimr.nl, notm...@gmail.com
Target Milestone: 1.0
SUMMARY
When a heavy process is running that utilizes most of the CPU and IO resources
(e.g. Chromium compilation), plasma-systemmonitor's UI becomes completely
unusable (0.2 FPS), and KWin reports is as “not responding”. At the same time,
I am able to use Konsole, Dolphin and Firefox, and their UI is perfectly fine.
Normally, I do not have high performance expectations for QML-based software,
but since this is now the only process manager available in Plasma, it has to
be able to work under demanding conditions.
This was not a problem in Plasma 5 where I could always rely on the
QWidgets-based process list available through Ctrl-Esc.
STEPS TO REPRODUCE
1. Start a long build process that automatically utilizes all available
resources (e.g. through ninja or cargo).
2. Launch the new System Monitor.
3. Attempt to kill processes used for the build.
OBSERVED RESULT
Unable to perform meaningful user input.
EXPECTED RESULT
The UI is maybe a bit slow, but usable.
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20231226
KDE Plasma Version: 5.91.90
KDE Frameworks Version: 5.248.0
Qt Version: 6.6.1
Kernel Version: 6.6.7-1-default (64-bit)
Graphics Platform: Wayland
Processors: 32 × Intel® Core™ i9-14900K
Memory: 62.5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 4070/PCIe/SSE2
ADDITIONAL INFORMATION
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