Bug 490930

Summary: Heavy CPU load in System Monitor
Product: [Applications] plasma-systemmonitor Reporter: neobrain <bugs.7ng0x>
Component: generalAssignee: KSysGuard Developers <ksysguard-bugs>
Status: RESOLVED DUPLICATE    
Severity: normal CC: ahiemstra, duha.bugs, nate, plasma-bugs-null
Priority: NOR    
Version First Reported In: 6.1.3   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description neobrain 2024-07-28 15:47:54 UTC 
SUMMARY
System Monitor seems to always consume an entire CPU core for me, even when the entire machine is sitting idle. This is a regression introduced in Plasma 6.

STEPS TO REPRODUCE
1. Open System Monitor's Processes page
2. Order by CPU load
3. Look at the topmost entry

OBSERVED RESULT
System Monitor itself causes the highest CPU load (generally a full CPU core?) and is the topmost entry when no other heavy tasks are running.

EXPECTED RESULT
System Monitor shouldn't trigger significant CPU load, comparable Plasma 5's System Monitor.

SOFTWARE/OS VERSIONS
Linux: openSUSE Tumbleweed 6.1.3
KDE Plasma Version: 6.1.3
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION
Running Wayland
Comment 1 duha.bugs 2024-07-28 18:59:56 UTC 
This is possibly https://bugs.kde.org/show_bug.cgi?id=434877

I cannot reproduce on 6.1.80, it uses less than 1% for me.
Comment 2 Nate Graham 2024-07-30 19:20:35 UTC 

*** This bug has been marked as a duplicate of bug 434877 ***