https://bugs.kde.org/show_bug.cgi?id=480798
Adam Fontenot <adam.m.fontenot+...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDSINFO |RESOLVED
Resolution|WAITINGFORINFO |WORKSFORME
--- Comment #6 from Adam Fontenot <adam.m.fontenot+...@gmail.com> ---
I haven't see the issue recur, so I'm going to close this for now. I'll reopen
this if it happens again.
Some notes for others who may have encountered similar issues:
* The issue began for me either after Plasma 6 beta 1 or beta 2 was installed.
It was clearly present continuously for some time - even before I diagnosed the
issue, any time Plasma had been running for more than a few days I would
encounter performance issues.
* The Plasma 6 Wayland session still uses quite a bit more graphics memory
than Xorg, and this amount grows over time. Recently (since I stopped being
able to reproduce the bug), I see 2-3 GB of graphics memory held under Wayland
after about a week of use, vs ~0.5 GB for Xorg. But I haven't seen 50+%
utilization of GART since I reported the issue.
* The way you'd confirm you have the issue on an AMD system is, (a) you see a
lot of memory use that is not attributable to applications, cache, or ZFS ARC,
(b) the memory is not automatically reclaimed when you start an application
that uses a lot of memory - it crashes or you get an OOM condition, and (c)
running `radeontop` shows 90+% utilization of "GTT" memory, (d) closing all
userspace applications doesn't reduce it significantly, and (e) closing your
Plasma session and returning to a VTERM immediately reduces GART / GTT usage to
~0%.
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