Re: io resources and cached mappings (was: [git pull] drm patchesfor 2.6.27-rc1)

From: Keith Packard
Date: Thu Oct 23 2008 - 11:40:27 EST

On Thu, 2008-10-23 at 10:05 +0200, Ingo Molnar wrote:

> Any ballpark-figure numbers you can share with us?

For one quake-3 based game we use for performance regression checking,
64-bit kernels run about 18 times faster now. That's the difference
between using a zero-cost dynamic mapping and using ioremap_wc for each


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