Xvideo performance on Radeon 7500 vs Intel 915
sroland at tungstengraphics.com
Sun Dec 3 12:52:28 PST 2006
Ken Mandelberg wrote:
> mplayer: user: 124sec sys: 3secs real:198
> Xorg: user: 34sec sys: 32secs
> So unless there is a statistical anomaly here, it seems to have reduced
> the user space cpu time of Xorg by about 30%.
> Still it doesn't perform well enough to use except in a pinch because of
> frame drops (about 30%) . I guess the hardware is just not up to the
> task for HD, especially 1080i.
> For comparison with my Intel 915-Pentium M (2GHZ) on the same clip
> mplayer: user: 116sec sys: 3secs real:249
> Xorg: user: 2sec sys: 0secs
I think the dropped X cpu usage is about right for the patch, but there
still seems to be some problem. While a p4-m might be borderline fast
enough, and you can't expect X cpu time to be as low as on the i915, x
cpu usage looks quite high (if using dri (dma for xv)). You didn't say
if you tried increasing agp mode, though it shouldn't really make a
difference. Especially x.org system cpu time looks high, what is it
waiting for there.
Dunno though maybe you can't really expect it to be fast enough.
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