[Mesa-dev] Path to optimize (moving from create/bind/delete paradgim to set only ?)

[Jakob Bornecrantz]

On Tue, Nov 16, 2010 at 7:21 PM, Jerome Glisse <j.glisse at gmail.com> wrote:
> Hi,
>
> So i looked a bit more at what path we should try to optimize in the
> mesa/gallium/pipe infrastructure. Here are some number gathers from
> games :
> drawcall /     ps constant   vs constant     ps sampler    vs sampler
> doom3            1.45             1.39               9.24              9.86
> nexuiz             6.27             5.98               6.84              7.30
> openarena  2805.64             1.38               1.51              1.54
>
> (value of 1 mean there is a call of this function for every draw call,
> while value of 10 means there is a call to this function every 10 draw
> call, average)
>
> Note that openarena ps constant number is understable as it's fixed GL
> pipeline which is in use here and the pixel shader constant doesn't
> need much change in those case.
>
> So i think clear trend is that there is a lot of constant upload and
> sampler changing (allmost at each draw call for some games)

Can you look into what actually changes between the sampler states?
Also that vs sampler state change number for OpenArena looks a bit
fishy to me.

Cheers Jakob.