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TraceyC changed:
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https://bugs.kde.org/show_bug.cgi?id=440386
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Zamundaaa changed:
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Summary|High CPU use of |High CPU use of
|kwin_wayland whe
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Version|5.22.4 |5.23.5
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Sergey changed:
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--- Comment #9 from Sergey ---
Goog
https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #8 from Fabian Vogt ---
Git commit 11c7e7a64da3b39c89a1392f1f1112bc8c8ea8b7 by Fabian Vogt.
Committed on 09/08/2021 at 06:52.
Pushed by fvogt into branch 'master'.
scenes/opengl: Avoid blending for entirely opaque SurfaceItems
Blending is
https://bugs.kde.org/show_bug.cgi?id=440386
Bug Janitor Service changed:
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Ever confirmed|0 |1
Status|REPORTED
https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #6 from Vlad Zahorodnii ---
(In reply to Fabian Vogt from comment #5)
> I did some more comparisions with weston.
>
> perf shows that while weston runs into the "fs_variant_whole" path in
> llvmpipe, kwin_wayland almost exclusively uses the
https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #5 from Fabian Vogt ---
I did some more comparisions with weston.
perf shows that while weston runs into the "fs_variant_whole" path in llvmpipe,
kwin_wayland almost exclusively uses the slower "fs_variant_partial" functions.
With LP_DEBUG=
https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #4 from Fabian Vogt ---
I also tried playing a video in FF in Weston using the DRM backend and CPU
usage is ~25%. I had a look at how weston deals with received buffers and
copying damaged regions into local textures and it uses the same unp
https://bugs.kde.org/show_bug.cgi?id=440386
Nate Graham changed:
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--- Comment #2 from Fabian Vogt ---
> FWICT, the high CPU utilization is mostly from having a higher target frame
> rate than is actually displayed, which makes kwin_wayland fully CPU bound.
I somehow totally forgot that this was with the Show FPS eff
https://bugs.kde.org/show_bug.cgi?id=440386
--- Comment #1 from Fabian Vogt ---
It does not happen with either "KWIN_COMPOSE=Q" or when using the framebuffer
backend (which also forces QPainter).
I noticed that even though the refresh rate is set to 60Hz, kwin actually
renders 100fps according t
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