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punter
Guru
Joined: 25 Nov 2002
Posts: 506
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 Posted: Fri Mar 02, 2007 8:25 pm Post subject: why is AIGLX/XGL so slow?? |
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I have an Intel 915GM graphics card.
and I use AIGLX + beryl.
(I think AIGLX is much faster than XGL for i915, if anyone has experiences to the contrary, please let me know!)
and it's absolutely unbelievable how slow/painful scrolling of a webpage is.
I was just scrolling the gentoo forums list up and down.... my FPS was dropping down to 12fps, cpu to 100%, and I had anything but smooth scrolling at the end.
looks like this 3D is coming at very high costs after all. |
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robodeath
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Joined: 02 Jan 2006
Posts: 60
Location: Rome, GA
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| Posted: Fri Mar 02, 2007 8:27 pm Post subject: |
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| If you turn beryl off, is everything faster? Also i've noticed that some beryl options slow me down, like the fade thing. Have you tried beryl with default settings? |
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punter
Guru
Joined: 25 Nov 2002
Posts: 506
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| Posted: Fri Mar 02, 2007 8:48 pm Post subject: |
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beryl is not the performance eater here..... it is the AIGLX process that stands at the top of my 'top' list at all times.
i've ran e17 with AIGLX and i notice the same glitch when browsing webpages.... but my god, X (xorg) itself is so fast and so smooth.
what troubles me most... is that i have the firefox in the same state for both AIGLX and Xorg....
I mean, I have firefox window fully maximized and it isn't transparent or any other thing.... and yet the performance over AIGLX is at least a third lower than Xorg on its own. |
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booldog
n00b
Joined: 26 Aug 2005
Posts: 25
Location: Ohio, USA
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| Posted: Thu Mar 08, 2007 2:25 pm Post subject: |
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Your CPU is probably doing all the work, not your video card. Is DRI running? What's the result of: | Code: | | glxinfo | grep rendering |
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punter
Guru
Joined: 25 Nov 2002
Posts: 506
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| Posted: Thu Mar 08, 2007 7:28 pm Post subject: |
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| booldog wrote: | Your CPU is probably doing all the work, not your video card. Is DRI running? What's the result of: | Code: | | glxinfo | grep rendering |
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DRI's running perfectly.
It of course doesn't show-up under XGL, because of "indirect rendering", but AIGLX says "Direct Rendering: YES".
The problem is well beyond these issues.... Mac OS X is running on Intel hardware now. In fact, it runs on the very same graphics card as I have (Intel 915GM).
The difference in performance, speed and smoothness is HUGE.
I think everyone knows that XGL and AIGLX are crap... it's just that we're stuck with them until something better comes out... I think what we're waiting for is XEGL. is it? i'm not sure about the name... but there's definitely something along those lines. |
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