https://bugs.kde.org/show_bug.cgi?id=407917
Bug ID: 407917
Summary: Poor performance when open a more than N windows
Product: kwin
Version: 5.15.90
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-wayland
Assignee: kwin-bugs-n...@kde.org
Reporter: zvova7...@gmail.com
Target Milestone: ---
Is this normal, when I'm open 10 windows of some app(for example konsole) -
compositing performance is slowdown and moving, resizing, etc operation with
windows like slideshow, including cursor. If open 50 instances of some app -
0.5fps we had. In this case, is this normal behavior? This is not because no
more ram, swapping or something, this is realy kwin_wayland process eat a lot
processor time. I tried to sysprof - all processor time mostly in kernel DRM of
intel GPU driver.
STEPS TO REPRODUCE
1. Open 10+ windows of some app
2. Try to use system
OBSERVED RESULT
Poor performance
EXPECTED RESULT
All continue working smoothly
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 5.15.90
KDE Frameworks Version: 5.58.0
Qt Version: 5.13.0
Kernel Version: 5.1.4-arch1-1-ARCH
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-3630QM CPU @ 2.40GHz
Memory: 11.6 ГиБ
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