Asynchronous Compute : what are the benefits?

[Deleted member 13524]

Then why did Sony - as per Mark Cerny's statements - explicitly asked for a larger number of ACEs for the PS4, up from 2 ACEs/16 threads the GCN1.0 GPUs already supported?
And why did AMD later bring this enhancement to Hawaii, Tonga and Fiji?

 

[iroboto]

Then why did Sony - as per Mark Cerny's statements - explicitly asked for a larger number of ACEs for the PS4, up from 2 ACEs/16 threads the GCN1.0 GPUs already supported?
And why did AMD later bring this enhancement to Hawaii, Tonga and Fiji?

It's to support the possibility of having a lot of small jobs being queued up for processing. It doesn't increase performance.
Back up a couple of posts and sebbbi covers async threads.

 

[chris1515]

Then why did Sony - as per Mark Cerny's statements - explicitly asked for a larger number of ACEs for the PS4, up from 2 ACEs/16 threads the GCN1.0 GPUs already supported?
And why did AMD later bring this enhancement to Hawaii, Tonga and Fiji?

I never said it is not useful but it is maybe not useful without two others modifications volatile bits and the bus Onion +

I talk about the only developer giving an example of ACE usage in a PS4 title...

 

[Arnold Beckenbauer]

https://docs.unrealengine.com/lates...ing/ShaderDevelopment/AsyncCompute/index.html

The Rendering Hardware Interface (RHI) now supports asynchronous compute (AsyncCompute) for Xbox One.

What API?

 

[iroboto]

https://docs.unrealengine.com/lates...ing/ShaderDevelopment/AsyncCompute/index.html



What API?

I might be addressing the wrong question - but Xbox One only supports DirectX11_X, DirectX11_Fast Sementics, DirectX12_X.

 

[Scott_Arm]

Sounds like UE is late to get with async compute. Reading the doc it seems to only be available to Xbox One, and that's because Lionhead developed the feature and contributed it back into the engine. I imagine PS4 will be added soon.

 

[Arnold Beckenbauer]

I might be addressing the wrong question - but Xbox One only supports DirectX11_X, DirectX11_Fast Sementics, DirectX12_X.

And this is my question: It looks like UE 4.9 supports AC under Xbox Ones own Direct3D API and DX12 (which will come soon) is not necessary.

 

[Ike Turner]

Sounds like UE is late to get with async compute. Reading the doc it seems to only be available to Xbox One, and that's because Lionhead developed the feature and contributed it back into the engine. I imagine PS4 will be added soon.

IIRC this was added by Lionhead quite a while ago just after LPV GI but has only now been officially been included in the main branch. I'm surprised that another studio hasn't done the same for PC and PS4 yet.

 

[iroboto]

And this is my question: It looks like UE 4.9 supports AC under Xbox Ones own Direct3D API and DX12 (which will come soon) is not necessary.

Dx12 has more features and improvements over dx11_fast semantics. It's likely added to both to support any transition titles, but I would bet if I had documentation that dx12 will deprecate dx11 fast semantics going forward as the low level API and dx11.3X will replace dx11X.

 

[onQ]

Did we ever figure out why PS4 was almost 2x faster at Ubisoft's cloth simulation?

 

[mpg1]

Did we ever figure out why PS4 was almost 2x faster at Ubisoft's cloth simulation?

It was an unfair simulation. Ubisoft used at wet cloth for Xbox One.

 

[Globalisateur]

It was an unfair simulation. Ubisoft used at wet cloth for Xbox One.

The taller GPU was obviously better stimulated because it was the sexier next gen. No need for wet clothes.