From: Roland Scheidegger Date: Fri, 15 Jan 2016 02:10:40 +0000 (+0100) Subject: llvmpipe: ditch additional ref counting for vertex/geometry sampler views X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=03f66dfb4b399f078fc1bc99be1f0937ce981def;p=mesa.git llvmpipe: ditch additional ref counting for vertex/geometry sampler views The cleaning up was quite a performance hog (making pipe_resource_reference the number two in profilers on the vertex path, and 3rd overall, with its cousin pipe_reference_described not far behind) if there were lots of tiny draw calls (ipers). Now the reason was really that it was blindly calling this for all potential shader views (so 32 each for vs and gs) even though the app never touched a single one which could have been fixed, however I can't come up with a good reason why we refcount these. We've got references, of course, in the sampler views, which should be quite sufficient as we do all vertex and geometry shader execution fully synchronous. (Calling prepare_shader_sampling for all draw calls even if there were no changes looks quite suboptimal too, but generally we don't really expect vs/gs shader sampling to be used much with llvmpipe, and there's even an early exit if there aren't any views to avoid the "null loop" albeit it's now no longer always trying to loop through all 32 slots. Maybe improve another time...). Of course, if we manage to make vertex loads run asynchronously some day, we need references again, but adding that back would be the least of the problems... Also only set LP_NEW_SAMPLER_VIEW for fragment sampler views. Nothing on the vertex side depends on it (I suppose we'd really wanted a separate flag in any case). (Good for a 3% improvement or so in ipers under the right conditions.) Reviewed-by: Jose Fonseca --- diff --git a/src/gallium/drivers/llvmpipe/lp_context.h b/src/gallium/drivers/llvmpipe/lp_context.h index 62d99bbaac8..d4bd02d0225 100644 --- a/src/gallium/drivers/llvmpipe/lp_context.h +++ b/src/gallium/drivers/llvmpipe/lp_context.h @@ -82,8 +82,6 @@ struct llvmpipe_context { struct pipe_viewport_state viewports[PIPE_MAX_VIEWPORTS]; struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS]; struct pipe_index_buffer index_buffer; - struct pipe_resource *mapped_vs_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS]; - struct pipe_resource *mapped_gs_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS]; unsigned num_samplers[PIPE_SHADER_TYPES]; unsigned num_sampler_views[PIPE_SHADER_TYPES]; diff --git a/src/gallium/drivers/llvmpipe/lp_draw_arrays.c b/src/gallium/drivers/llvmpipe/lp_draw_arrays.c index edfb2040969..22ef5fc17f9 100644 --- a/src/gallium/drivers/llvmpipe/lp_draw_arrays.c +++ b/src/gallium/drivers/llvmpipe/lp_draw_arrays.c @@ -149,9 +149,6 @@ llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info) draw_vs_reset_so(lp->vs); } } - - llvmpipe_cleanup_vertex_sampling(lp); - llvmpipe_cleanup_geometry_sampling(lp); /* * TODO: Flush only when a user vertex/index buffer is present diff --git a/src/gallium/drivers/llvmpipe/lp_state.h b/src/gallium/drivers/llvmpipe/lp_state.h index 2da6caaef16..78918cf984d 100644 --- a/src/gallium/drivers/llvmpipe/lp_state.h +++ b/src/gallium/drivers/llvmpipe/lp_state.h @@ -130,16 +130,10 @@ void llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *ctx, unsigned num, struct pipe_sampler_view **views); -void -llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx); - void llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *ctx, unsigned num, struct pipe_sampler_view **views); -void -llvmpipe_cleanup_geometry_sampling(struct llvmpipe_context *ctx); - #endif diff --git a/src/gallium/drivers/llvmpipe/lp_state_sampler.c b/src/gallium/drivers/llvmpipe/lp_state_sampler.c index 1e055878f7c..69af38e92c0 100644 --- a/src/gallium/drivers/llvmpipe/lp_state_sampler.c +++ b/src/gallium/drivers/llvmpipe/lp_state_sampler.c @@ -98,8 +98,9 @@ llvmpipe_bind_sampler_states(struct pipe_context *pipe, llvmpipe->samplers[shader], llvmpipe->num_samplers[shader]); } - - llvmpipe->dirty |= LP_NEW_SAMPLER; + else { + llvmpipe->dirty |= LP_NEW_SAMPLER; + } } @@ -146,8 +147,9 @@ llvmpipe_set_sampler_views(struct pipe_context *pipe, llvmpipe->sampler_views[shader], llvmpipe->num_sampler_views[shader]); } - - llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW; + else { + llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW; + } } @@ -228,8 +230,7 @@ prepare_shader_sampling( struct llvmpipe_context *lp, unsigned num, struct pipe_sampler_view **views, - unsigned shader_type, - struct pipe_resource *mapped_tex[PIPE_MAX_SHADER_SAMPLER_VIEWS]) + unsigned shader_type) { unsigned i; @@ -242,7 +243,7 @@ prepare_shader_sampling( if (!num) return; - for (i = 0; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; i++) { + for (i = 0; i < num; i++) { struct pipe_sampler_view *view = i < num ? views[i] : NULL; if (view) { @@ -253,11 +254,6 @@ prepare_shader_sampling( unsigned first_level = 0; unsigned last_level = 0; - /* We're referencing the texture's internal data, so save a - * reference to it. - */ - pipe_resource_reference(&mapped_tex[i], tex); - if (!lp_tex->dt) { /* regular texture - setup array of mipmap level offsets */ struct pipe_resource *res = view->texture; @@ -335,47 +331,28 @@ prepare_shader_sampling( /** - * Called during state validation when LP_NEW_SAMPLER_VIEW is set. + * Called whenever we're about to draw (no dirty flag, FIXME?). */ void llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp, unsigned num, struct pipe_sampler_view **views) { - prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX, - lp->mapped_vs_tex); -} - -void -llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx) -{ - unsigned i; - for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) { - pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL); - } + prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX); } /** - * Called during state validation when LP_NEW_SAMPLER_VIEW is set. + * Called whenever we're about to draw (no dirty flag, FIXME?). */ void llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *lp, unsigned num, struct pipe_sampler_view **views) { - prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY, - lp->mapped_gs_tex); + prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY); } -void -llvmpipe_cleanup_geometry_sampling(struct llvmpipe_context *ctx) -{ - unsigned i; - for (i = 0; i < Elements(ctx->mapped_gs_tex); i++) { - pipe_resource_reference(&ctx->mapped_gs_tex[i], NULL); - } -} void llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)