[Intel-gfx] [PATCH] intel: Add support for (possibly) unsynchronized maps.

Kenneth Graunke kenneth at whitecape.org
Sun Feb 26 21:28:09 CET 2012

On 02/25/2012 03:00 AM, Daniel Vetter wrote:
> On Fri, Feb 24, 2012 at 07:53:22PM -0800, Eric Anholt wrote:
>> This improves the performance of Mesa's GL_MAP_UNSYNCHRONIZED_BIT path
>> in GL_ARB_map_buffer_range.  Improves Unigine Tropics performance at
>> 1024x768 by 2.06236% +/- 0.50272% (n=11).
>> ---
> A few questions:
> - iirc Ben's non-blocking stuff also worked for non-llc machines - I guess
>    you haven't looked into this because we don't have a non-llc platform
>    that runs ungine?

Tropics works on Ironlake, too, it's just slow.  Haven't tried earlier.

> - in my pwrite experience, writing through cpu maps beats writing through
>    the gtt on llc machines. This has the added benefit that it reduces
>    pressure on the mappable gtt. Have you tried that, too?
> Cheers, Daniel

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