radv: Improve spilling on discrete GPUs.
The linked bug gets better performance and I personally verified better spilling performance on HZD so let us make this step for now. Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3183 Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3698 Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> CC: mesa-stable Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6833>
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@ -445,9 +445,17 @@ radv_amdgpu_winsys_bo_create(struct radeon_winsys *_ws,
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* GTT(RAM) usage, which is shared with the OS, allow VRAM
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* placements too. The idea is not to use VRAM usefully, but
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* to use it so that it's not unused and wasted.
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*
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* Furthermore, even on discrete GPUs this is beneficial. If
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* both GTT and VRAM are set then AMDGPU still prefers VRAM
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* for the initial placement, but it makes the buffers
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* spillable. Otherwise AMDGPU tries to place the buffers in
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* VRAM really hard to the extent that we are getting a lot
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* of unnecessary movement. This helps significantly when
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* e.g. Horizon Zero Dawn allocates more memory than we have
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* VRAM.
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*/
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if (!ws->info.has_dedicated_vram)
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request.preferred_heap |= AMDGPU_GEM_DOMAIN_GTT;
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request.preferred_heap |= AMDGPU_GEM_DOMAIN_GTT;
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}
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if (initial_domain & RADEON_DOMAIN_GTT)
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