Bug 450880 - [Wayland] If window preview is enabled, RAM usage quickly increases while I hover over the task manager
Summary: [Wayland] If window preview is enabled, RAM usage quickly increases while I h...
Status: CONFIRMED
Alias: None
Product: plasmashell
Classification: Plasma
Component: generic-performance (show other bugs)
Version: 5.27.5
Platform: Arch Linux Linux
: NOR normal
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords: efficiency
Depends on:
Blocks:
 
Reported: 2022-02-26 14:27 UTC by Patrick Silva
Modified: 2023-05-12 16:30 UTC (History)
4 users (show)

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Version Fixed In:

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Description Patrick Silva 2022-02-26 14:27:27 UTC 
STEPS TO REPRODUCE
1. add Memory Usage widget to desktop
2. have grouped and non-grouuped apps in the task manager
3. minimize all windows
4. repeatedly hover over each entry in the task manager and observe the RAM usage reported by the widget placed on desktop

OBSERVED RESULT
RAM usage reported by the widget quickly increases despite System Activity (ctrl+esc) does not show any app/proccess consuming more RAM during the steps above. On my system, Plasma even crashes at some point while I hover over the task manager, and then the RAM usage immediately returns to normal.

EXPECTED RESULT
observed result should not occur

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.24.80
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Graphics Platform: Wayland
Comment 1 Nate Graham 2022-03-20 13:37:52 UTC 
That's very strange. I cannot reproduce the issue.
Comment 2 Patrick Silva 2022-05-19 18:52:09 UTC 
RAM usage increases even faster on Plasma 5.25 beta.

Operating System: Arch Linux
KDE Plasma Version: 5.24.90
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4
Graphics Platform: Wayland
Comment 3 David Edmundson 2022-06-17 08:35:18 UTC 
Please can you try to get a log in heaptrack
Comment 4 Patrick Silva 2022-06-27 14:10:05 UTC 
(In reply to David Edmundson from comment #3)
> Please can you try to get a log in heaptrack

Done. You can download the log in the following link

https://www.mediafire.com/file/sz78o1cv4r4esz6/heaptrack.plasmashell.13719.zst/file
Comment 5 David Edmundson 2022-06-27 14:34:35 UTC 
That's not showing a leak, 115Mb peak.
Nothing too abnormal.

It could be that heaptrack won't show shared memory that we allocate that way and given it's related to thumbnails is a plausible place to look.
Comment 6 Patrick Silva 2022-09-17 17:26:48 UTC 
It's still reproducible.

Operating System: Arch Linux
KDE Plasma Version: 5.25.90
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.6
Graphics Platform: Wayland
Comment 7 Patrick Silva 2022-10-31 13:31:50 UTC 
Memory Usage widget reports that used RAM increases ~300 MiB when I hover over gtouped Konsoles and then decreases ~300 MiB too when mouse pointer leaves the Plasma panel.

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.26.80
KDE Frameworks Version: 5.100.0
Qt Version: 5.15.7
Graphics Platform: Wayland
Comment 8 Nate Graham 2022-10-31 18:23:32 UTC 
I can reproduce that now.
Comment 9 Patrick Silva 2023-05-12 16:30:02 UTC 
Can reproduce as explained in comment 7 even if the preview are disabled.

Operating System: Arch Linux 
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Graphics Platform: Wayland