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https://bugs.freedesktop.org/show_bug.cgi?id=9400
------- Additional Comments From [EMAIL PROTECTED] 2006-12-21 09:38 -------
(In reply to comment #9)
> The only problem that I want to point out is the slowdown when I scroll (both
> when using a compositing wm and not), caused by hi cpu usage. The slowdown as
> told before, is present when using radeon (and also fglrx). NVIDIA and INTEL
> users are reporting no cpu usage when scrolling. Michel, which video card have
> you got?
(--) RADEON(0): Chipset: "ATI Radeon Mobility 9600/9700 (M10/M11) NP (AGP)"
(ChipID = 0x4e50)
The lack of RENDER acceleration is quite clearly the bottleneck for scrolling
performance with most apps here. Again though, for EXA you'll definitely need
the xserver exa-damagetrack branch, as otherwise EXA itself is incapable of
accelerating a lot of things properly.
> Do you think I should open another bug report for glxgears? or the 100% of cpu
> usage is definitely caused by the lack of RENDER acceleration?
(The lack of) RENDER acceleration only affects the X server, not 3D apps.
> (fglrx uses near 0% so this is definitely not normal)
fglrx uses intermittent sleeps; this has generated some complaints of its own
because glxgears no longer gives quite insane framerates on some machines... You
might be able to achieve a similar effect by setting the driconf setting
fthrottle_mode to 1 ('Performance' => 'Method to limit rendering latency' =>
'Sleep for brief intervals while waiting for the graphics hardware' in the
driconf GUI).
PS: glxgears is not a benchmark nor particularly useful otherwise, anyway. Are
you having the same issue with useful 3D apps?
PPS: You could try profiling with sysprof or oprofile to see where the cycles
are spent.
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