[Mesa-dev] [PATCH] i965: Don't disable CCS for RT dependencies when dispatching compute.
Jason Ekstrand
jason at jlekstrand.net
Tue Oct 24 05:52:24 UTC 2017
Rb
On October 23, 2017 22:21:47 Kenneth Graunke <kenneth at whitecape.org> wrote:
> Compute shaders don't have access to the framebuffer, so there's no
> point in worrying whether a texture is bound as a render target.
>
> This saves a bunch of resolves in GFXBench4 Manhattan 3.1, but doesn't
> seem to impact performance at all, at least on Apollolake.
> ---
> src/mesa/drivers/dri/i965/brw_compute.c | 2 +-
> src/mesa/drivers/dri/i965/brw_context.h | 2 +-
> src/mesa/drivers/dri/i965/brw_draw.c | 6 +++---
> 3 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_compute.c
> b/src/mesa/drivers/dri/i965/brw_compute.c
> index c1b2df590b7..9be7523bab3 100644
> --- a/src/mesa/drivers/dri/i965/brw_compute.c
> +++ b/src/mesa/drivers/dri/i965/brw_compute.c
> @@ -177,7 +177,7 @@ brw_dispatch_compute_common(struct gl_context *ctx)
>
> brw_validate_textures(brw);
>
> - brw_predraw_resolve_inputs(brw);
> + brw_predraw_resolve_inputs(brw, false);
>
> /* Flush the batch if the batch/state buffers are nearly full. We can
> * grow them if needed, but this is not free, so we'd like to avoid it.
> diff --git a/src/mesa/drivers/dri/i965/brw_context.h
> b/src/mesa/drivers/dri/i965/brw_context.h
> index 26e71e62b54..0102f154248 100644
> --- a/src/mesa/drivers/dri/i965/brw_context.h
> +++ b/src/mesa/drivers/dri/i965/brw_context.h
> @@ -1234,7 +1234,7 @@ void intel_update_renderbuffers(__DRIcontext *context,
> __DRIdrawable *drawable);
> void intel_prepare_render(struct brw_context *brw);
>
> -void brw_predraw_resolve_inputs(struct brw_context *brw);
> +void brw_predraw_resolve_inputs(struct brw_context *brw, bool rendering);
>
> void intel_resolve_for_dri2_flush(struct brw_context *brw,
> __DRIdrawable *drawable);
> diff --git a/src/mesa/drivers/dri/i965/brw_draw.c
> b/src/mesa/drivers/dri/i965/brw_draw.c
> index b74ab8bde23..80d4891f6f6 100644
> --- a/src/mesa/drivers/dri/i965/brw_draw.c
> +++ b/src/mesa/drivers/dri/i965/brw_draw.c
> @@ -381,7 +381,7 @@ intel_disable_rb_aux_buffer(struct brw_context *brw,
> * enabled depth texture, and flush the render cache for any dirty textures.
> */
> void
> -brw_predraw_resolve_inputs(struct brw_context *brw)
> +brw_predraw_resolve_inputs(struct brw_context *brw, bool rendering)
> {
> struct gl_context *ctx = &brw->ctx;
> struct intel_texture_object *tex_obj;
> @@ -416,7 +416,7 @@ brw_predraw_resolve_inputs(struct brw_context *brw)
> num_layers = INTEL_REMAINING_LAYERS;
> }
>
> - const bool disable_aux =
> + const bool disable_aux = rendering &&
> intel_disable_rb_aux_buffer(brw, tex_obj->mt, min_level, num_levels,
> "for sampling");
>
> @@ -678,7 +678,7 @@ brw_prepare_drawing(struct gl_context *ctx,
> * and finalizing textures but before setting up any hardware state for
> * this draw call.
> */
> - brw_predraw_resolve_inputs(brw);
> + brw_predraw_resolve_inputs(brw, true);
> brw_predraw_resolve_framebuffer(brw);
>
> /* Bind all inputs, derive varying and size information:
> --
> 2.14.2
>
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