[Mesa-dev] [PATCH 00/26] RadeonSI: Primitive culling with async compute

[Dieter Nützel]

After you've recuperated from hopefully GREAT vacation,

is it time? ;-)

Greetings,
Dieter

Am 26.02.2019 03:31, schrieb Dieter Nützel:
> Hello Marek,
> 
> do you plan to commit or rebase both set?
> 
> Dieter
> 
> Am 14.02.2019 07:29, schrieb Marek Olšák:
>> I have some fixes for Sea Islands that improve Radeon 290X performance
>> to 43 fps, moving it just below Radeon VII in the picture.
>> 
>> Marek
>> 
>> On Wed, Feb 13, 2019 at 12:16 AM Marek Olšák <maraeo at gmail.com>
>> wrote:
>> 
>>> Hi,
>>> 
>>> This patch series uses async compute to do primitive culling before
>>> the vertex shader. It significantly improves performance for
>>> applications
>>> that use a lot of geometry that is invisible because primitives
>>> don't
>>> intersect sample points or there are a lot of back faces, etc.
>>> 
>>> It passes 99.9999% of all tests (GL CTS, dEQP, piglit) and is 100%
>>> stable.
>>> It supports all chips all the way from Sea Islands to Radeon VII.
>>> 
>>> As you can see in the results marked (ENABLED) in the picture below,
>>> it destroys our competition (The GeForce results are from a Phoronix
>>> article from 2017, the latest ones I could find):
>>> 
>>> Benchmark: ParaView - Many Spheres - 2560x1440
>>> https://people.freedesktop.org/~mareko/prim-discard-cs-results.png
>>> 
>>> The last patch describes the implementation and functional
>>> limitations
>>> if you can find the huge code comment, so I'm not gonna do that
>>> here.
>>> 
>>> I decided to enable this optimization on all Pro graphics cards.
>>> The reason is that I haven't had time to benchmark games.
>>> This decision may be changed based on community feedback, etc.
>>> 
>>> People using the Pro graphics cards can disable this by setting
>>> AMD_DEBUG=nopd, and people using consumer graphics cards can enable
>>> this by setting AMD_DEBUG=pd. So you always have a choice.
>>> 
>>> Eventually we might also enable this on consumer graphics cards for
>>> those
>>> games that benefit. It might decrease performance if there is not
>>> enough
>>> invisible geometry.
>>> 
>>> Branch:
>>> https://cgit.freedesktop.org/~mareko/mesa/log/?h=prim-discard-cs
>>> 
>>> Please review.
>>> 
>>> Thanks,
>>> Marek
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