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radv: Increase NGG culling PS param limit to 12 on GFX10.

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Helps performance in Baldur's Gate 3 on Navi 10
when NGG culling is enabled.

Also fix the description of the RADV_PERFTEST=nggc env var.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31971>
This commit is contained in:
Timur Kristóf 2024-11-05 01:30:48 +01:00 • committed by Marge Bot
parent 5068a6b4ce
commit 6bf19b2d70
2 changed files with 3 additions and 1 deletions
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2
docs/envvars.rst
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@ -1663,7 +1663,7 @@ RadeonSI driver environment variables
``nongg``
Disable NGG and use the legacy pipeline.
``nggc``
Always use NGG culling even when it can hurt.
Always use NGG culling even on GPUs where it is disabled by default.
``nonggc``
Disable NGG culling.
``switch_on_eop``

2
src/amd/vulkan/radv_shader.c
View file

@ -669,6 +669,8 @@ radv_consider_culling(const struct radv_physical_device *pdev, struct nir_shader
if (pdev->info.gfx_level >= GFX10_3 && pdev->info.has_dedicated_vram)
max_ps_params = 12; /* GFX10.3 and newer discrete GPUs. */
else if (pdev->info.gfx_level == GFX10 && pdev->info.has_dedicated_vram)
max_ps_params = 12;
/* TODO: consider other heuristics here, such as PS execution time */
if (util_bitcount64(ps_inputs_read) > max_ps_params)