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Old 12-18-08, 06:26 AM   #1
kernelOfTruth
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Join Date: Nov 2007
Location: Vienna, Austria; Germany; hello world :)
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Default glxgears shows much less fps in kde4 (kwin -> opengl) than in gnome + compiz-fusion

Hi,

I just wanted to inform you guys that I'm getting much less fps in kde4 (kwin is the window-manager, opengl effects) than in gnome with compiz-fusion

those are 3500-3700 (kde4)

compared to 7000-7200

I know, glxgears is not a benchmark but perhaps this helps during troubleshooting,

kde4 definitely needs some more speed-tuning

the card I'm using: 7600 GT (passive cooled, from MSI)
~amd64, Gentoo with gcc-4.3.2 hardened, 2.6.28-rc8-zen1
kde4-beta2 (from svn checked out during official tagging day; Tuesday 16th)

update:


ok, it heavily depends on the effects you activated

e.g. disabling shadows behind windows increases the fps by 200-300

it's nevertheless more heavy on the graphics system than compiz(-fusion)
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gcc version 4.4.0 (Gentoo Hardened 4.4.0-r1, espf-0.2.1)
Ubuntu Jaunty/9.04 x86_64 Dell XPS M1330
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Old 12-18-08, 08:17 AM   #2
Lake-end
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Join Date: Jun 2007
Posts: 5
Default Re: glxgears shows much less fps in kde4 (kwin -> opengl) than in gnome + compiz-fusi

I think it is solely dependant on the kwin desktop effects. If I set the glxgears running and flick the effects switch (I have the plasmoid that looks like a lights switch and it enables/disables deskto effects) the results jump from 3000-4000 to 10000+. This is with 8800GT and latest beta drivers.
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