[Intel-gfx] [PATCH] intel: Add a new bufmgr alloc function to get BOs ready for rendering to.

Chris Wilson chris at chris-wilson.co.uk
Thu Feb 19 11:53:32 CET 2009

On Wed, 2009-02-18 at 13:13 -0800, Eric Anholt wrote:
> This avoids using the oldest BO in the BO cache and waiting for it to be
> idle before we turn around and render to it with the GPU.  Thanks to
> Chris Wilson for pointing out how silly we were being.

Meh - usually it's the other away around :-)

Using the MRU buffer is a nice refinement - at the very least it
preserves the oldest buffer for when we absolutely need an idle buffer.
My immediate observation is that this will interact badly (on i915 class
h/w) with tiled buffers if we subsequently need to change tiling. Not
that I think this is likely with the current users, but...

I wonder whether UXA can benefit from this new API? If so, I'll do a run
through of cairo-perf.

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