Bug 472620

Summary: Wrong CPU Accounting after linux kernel 6.4.3 and 6.1.38
Product: [Applications] plasma-systemmonitor Reporter: Alexander Ullrich <ealex79>
Component: generalAssignee: KSysGuard Developers <ksysguard-bugs>
Status: RESOLVED UPSTREAM    
Severity: major CC: ahiemstra, nate, plasma-bugs-null
Priority: HI    
Version First Reported In: 5.27.6   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Example

Description Alexander Ullrich 2023-07-25 14:58:49 UTC 
Created attachment 160515 [details]
Example

SUMMARY
Plasma widgets account for cpu core usage report one busy, 100 % used, core on linux 6.4.4 and later and on 6.1.39 and later.

https://bugs.archlinux.org/task/79177
https://lore.kernel.org/lkml/12251678.O9o76ZdvQC%40natalenko.name

Apparently the kernel won't change its behaviour and expects tools to change.

OBSERVED RESULT
One core constantly reported as 100 % used.

EXPECTED RESULT
No usage attributed, see links above.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch linux all kernels after 6.4.3, 6.1.38, Plasma 5.27.6
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Comment 2 Nate Graham 2023-07-26 00:22:32 UTC 
Oh good!