On Tue, Nov 16, 2010 at 9:17 PM, Jerome Glisse <j.gli...@gmail.com> wrote: > On Tue, Nov 16, 2010 at 3:51 PM, Jakob Bornecrantz <wallbra...@gmail.com> > wrote: >> On Tue, Nov 16, 2010 at 7:21 PM, Jerome Glisse <j.gli...@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. >> > > I haven't looked at what change yet, i assume something small, i think > bugle trace of the engine is maybe easier to use than looking at > quake3 source code. For the vs sampler i was surprised too but it's > just the fact that q3 changes the vertex buffer a lot and this trigger > the vs sampler.
I was thinking more along the lines of diffing the pipe_sampler_state object and see what changed, what I'm suspecting is that its only the max_lod field that keep changing. Games should usually stay within the same number of textures and type of texture modes for for most draw calls. When you say vs_sampler do you mean bind_vertex_sampler_states or bind_vertex_elements_state. Cheers Jakob. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
