https://bugs.kde.org/show_bug.cgi?id=416303
Bug ID: 416303
Summary: ksgrd_network_helper maxes out an entire CPU thread
while qBittorrent is running
Product: ksysguard
Version: 5.17.5
Platform: Compiled Sources
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: ksysguard
Assignee: ksysguard-b...@kde.org
Reporter: kdeb...@fratti.ch
Target Milestone: ---
Created attachment 125154
--> https://bugs.kde.org/attachment.cgi?id=125154&action=edit
flamegraph of the ksgrd_network_helper process, captured with a 99 Hz interval
for 60 seconds.
ksgrd_network_helper sits at full usage of one logical CPU core if qBittorrent
is running in the background. If one closes qBittorrent, the CPU usage of
ksgrd_network_helper drops.
STEPS TO REPRODUCE
1. Launch ksysguard
2. Launch qBittorrent with some torrents
3. Look at the CPU usage of ksgrd_network_helper
OBSERVED RESULT
Ridiculously high CPU usage because it presumably scales badly with the number
of connections an application makes.
EXPECTED RESULT
Developer realises that more network applications than just web browsers exists
and uses appropriately scaling algorithms.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Linux 5.4.8 / Plasma 5.17.5
(available in About System)
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.65.0
Qt Version: 5.14.0
ADDITIONAL INFORMATION
I'm tunnelling through wireguard while doing this, but I'm not sure if it
matters at all.
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