https://bugs.kde.org/show_bug.cgi?id=501055
Bug ID: 501055
Summary: plasmashell high idle CPU usage
Classification: Plasma
Product: plasmashell
Version: 6.3.2
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: generic-performance
Assignee: plasma-b...@kde.org
Reporter: anhollander...@gmail.com
Target Milestone: 1.0
SUMMARY
plasmashell is using CPU time even when it's not being interacted with. It's
not actually that high (<1%, not even enough to cause the CPU to come out of
idle), but it happens on one system and not on the other.
STEPS TO REPRODUCE
It just happens all the time.
OBSERVED RESULT
I observed it initially with htop. Using strace shows that it is calling
ppoll() many times per second, with exactly the same parameters. I know of
lsfd, but I'm not sure exactly how to determine exactly what file descriptors
are being referenced.
EXPECTED RESULT
On my other system, plasmashell stays idle, only occasionally making futex()
syscalls.
SOFTWARE/OS VERSIONS
Operating System: Gentoo Linux 2.17
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.5-20R5-sched-ext (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i5-10310U CPU @ 1.70GHz
Memory: 7.5 GiB of RAM
Graphics Processor: Intel® UHD Graphics
ADDITIONAL INFORMATION
If I knew how to use profiling tools, I'd go straight to them. But I don't :(
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