per-fb mmap for platinumfb and valkyriefb in 2.4 (and 2.2)

[Michel Dänzer]

Martin Costabel wrote:

> In fact, I don't see any difference between the situation before and after
> the patch. For x11perf --scroll500, I get exactly as before 36.2/sec for
> 1024x768 at 8bit. This is with XFree68-4.0.1; used to be 13/sec with older X
> servers.

X 4.x has ShadowFB, which shadows the framebufer in RAM and avoids reads from
VRAM.

I think Michel (the other one ;) either uses X 3.3.x or no ShadowFB.


Michel


PS: My Rage128 Mobility gives me 578.0/sec :)

--
Earthling Michel Dänzer (MrCooper)  \  CS student and free software enthusiast
Debian GNU/Linux (powerpc,i386) user \   member of XFree86 and The DRI Project

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