Bug 432115

Summary: Graph updates are choppy
Product: [Applications] plasma-systemmonitor Reporter: gudvinr+kde
Component: generalAssignee: KSysGuard Developers <ksysguard-bugs>
Status: REPORTED ---    
Severity: wishlist CC: ahiemstra, alex765, kde.podagric, nate, plasma-bugs-null, postix, richard.llom
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description gudvinr+kde 2021-01-25 20:01:19 UTC 
SUMMARY

Both plasma-systemmonitor and ksysguard update graphs every "tick" so it make them look choppy rather than smoothly progressing.
Right now plasma-systemmonitor do not even have settings to set "tick" period.

It may be possible to update graphs in real time with certain speed but update value only at these "ticks" by either buffering value on previous tick and use interpolation for values in between or update continuously using current value.

First approach will lag one tick behind. Or even more, depending on how smooth graphs should be. But it will produce wavy graphs.

Second approach will probably look a little staircasy but will represent real values rather than interpolated ones.

I personally lean to first one since purpose of graphs in system monitor is not to determine if your system had 88.9% cpu load 0.5 or 1.0 seconds ago but to see general system or process behaviour.

SOFTWARE/OS VERSIONS
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Plasma System Monitor Version: 1.0
Comment 1 Richard Llom 2021-02-06 14:57:31 UTC 
Yes, I agree smooth updates scrolling would be very nice.

BTW, you change the tick settings. It is under Data Ranges -> "to (X)" value.