[Mesa-dev] Draft ARB_parallel_shader_compile RFC

[Nicolai Hähnle]

On 17.04.2017 14:07, Edward O'Callaghan wrote:
> Hi folks,
>
> This is my early draft on the threaded shader compile "suggestion"
> thread. The requirements according the spec are rather weak as
> it is up to the implementation, which frankly can even just ignore
> the requested thread count. However, afaik in the case of radeonsi
> it is already threaded. Anyhoo I just wanted to get some feedback..

Thanks for working on this. As others said, 90% of the work is 
elsewhere. Some thoughts on that:

Since radeonsi already does parallelization of the backend compile, this 
extension should control the sum of threads used for frontend *and* 
backend compiles. In practice, that should mean having a single thread 
pool which services both types of compiles (and links).

My first thought would be to have a driver-allocated util_queue which 
gets passed across the Gallium and Mesa interfaces -- or perhaps have a 
driver function table entry for kicking off asynchronous compiles and links.

Cheers,
Nicolai


> Please kindly review,
>
> Edward O'Callaghan (3):
>
>  [PATCH 1/3] mesa: Add ARB_parallel_shader_compile boilerplate
>  [PATCH 2/3] mesa: implement ARB_parallel_shader_compile
>  [PATCH 3/3] st/mesa: enable ARB_parallel_shader_compile
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