https://bugs.kde.org/show_bug.cgi?id=479740
Bug ID: 479740
Summary: Unreasonably high CPU usage
Classification: Applications
Product: plasma-systemmonitor
Version: 5.92.0
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: ksysguard-b...@kde.org
Reporter: madc...@atlas.cz
CC: ahiems...@heimr.nl, plasma-b...@kde.org
Target Milestone: ---
This issue is very likely not related to plasma-systemmonitor directly but it
is the only tool from the KDE suite I have available.
For a program that is supposed to query statuses of system utilization once it
a while, the program seems to utilize the CPU a lot. On an otherwise completely
idle system, plasma-systemmonitor will use anywhere between approx. 15 - 25 %
CPU when showing the list of all active processes. I don't have the CPU usage
readout normalized so the maximum would be 800 % on my Intel i7-3632QM.
For comparison, similarly configured htop never uses more than ~8 % CPU. For
further comparison, on this system, Firefox playing Full HD video stream needs
about 30 % of CPU time (all non-normalized).
According to the profiler, most of the time is spent inside the Qt signalling
machinery. I built both plasma-systemmonitor and libksysguard with debugging
information and frame pointers enabled so the perf log is hopefully accurate
enough.
I installed plasma-systemmonitor only when I started testing Plasma 6. I don't
recall any of the Plasma 5 resource monitoring tools to ever even show up on a
CPU-usage-sorted list and I was using those tools a lot.
I attached some screenshots to illustrate the problem better. Mind that the
sampling rate and CPU frequency scaling obscures the readout a bit.
--
You are receiving this mail because:
You are watching all bug changes.
