Hi!
Tungsten Graphics has decided to push an updated version of i915tex,
that works with the latest xf86-video-intel and drm. The driver will be
available on the mesa i915tex-branch, which is based off the mesa_7_0
branch.
The reasons for doing this are the following.
1) We plan on reusing the TTM interaction for upcoming Gallium drivers.
2) It's important for us that the TTM functionality we use for this
driver (user-space buffer pools) remains intact, hence it can be used
for testing DRM TTM regressions.
3) The driver provides an easily accessible performance reference for
TTM performance experiments with newer drivers:
* For measuring buffer-handling efficiency, good benchmarks are the
CPU-bound ones: gears, minimized until it becomes completely
CPU-bound, and ipers. (After of course disabling damage reporting
which tends to be a CPU hog).
* For measuring CPU caching effects, "texdown" is a good benchmark,
with and without subteximage.
The driver still has some rough edges. The vblank code has been
disabled, and due to the simplicity of the user-space buffer allocator,
the memory usage for batch-buffers is higher than optimal.
/Thomas
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