[Mesa-dev] [PATCH] gallium: add pipe_grid_info::partial_block

[Ilia Mirkin]

On Tue, Jan 8, 2019 at 6:21 PM Marek Olšák <maraeo at gmail.com> wrote:
>
> On Tue, Jan 8, 2019 at 5:25 PM Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>>
>> Why does this need to be in p_state? And who is responsible for
>> setting it (and how will it be set)?
>
>
> Oh right, there is a way to get it out of p_state.h if needed.
>
> It should be set to 0 by default.
>
> If your thread block is 8x8x1, but you need to launch 10x8x1 threads, set partial_block = {2, 0, 0}. It will launch the following thread blocks:
> 8x8x1
> 2x8x1
>
> It's the same as launching 16x8x1 threads and doing this at the beginning of the compute shader:
>   if (globalThreadID.x >= 10) return;

But that all sounds like something a state tracker wouldn't care
about, right? In e.g. GLSL you can specify the block to be 10x8x1 and
let the backend work it all out. Should st/mesa care about this (or
clover or whatever)?

  -ilia