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List:       kde-bugs-dist
Subject:    [kwin] [Bug 322060] Synced swapping on double buffered nvidia GPUs cause high CPU load
From:       Nikos Chantziaras <realnc () gmail ! com>
Date:       2013-12-21 20:34:22
Message-ID: bug-322060-17878-E6VT0r3apY () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=322060

--- Comment #74 from Nikos Chantziaras <realnc@gmail.com> ---
It's been four days now and I wasn't able to reproduce this again even once :-/
Although I did now upgrade to KDE 4.12.0, kwin is still at 4.11.4 (and AFAIK,
there will be no 4.12 release of kwin). Unless the update did change something
that would result in the bug not triggering anymore.

Anyway, on a related matter: since I upgraded my GPU to a GTX 780, performance
has increased immensely. Triple buffering was very useful before, as falling
below 60FPS would introduce quite some input lag and TB would mitigate this at
the cost of an additional frame of input lag in 60FPS situation. That was the
lesser evil, so TB was a good thing.

Now, 60FPS is a given in pretty much everything I care to throw at the graphics
card. The only thing TB now does is the additional input lag, which isn't a
compromise anymore, but a clear cut drawback. Playing "Metro Last Light" or
"Left 4 Dead 2" for example with TB enabled makes the mouse input feel
"floaty." This isn't as important in 3D applications, but in games, it's quite
important for the controls to feel "snappy."

So the question is: is/will kwin be able to cope with this? Linux as a gaming
platform is becoming more important as of late.

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