From 3002d77dfdd23c2b792b80724822ccc890258771 Mon Sep 17 00:00:00 2001
From: Dhruv Mark Collins <mark@igalia.com>
Date: Thu, 12 Mar 2026 15:40:16 +0000
Subject: [PATCH] tu+util: Prefer SYSMEM for DXVK/VKD3D

PC games tend to almost always run far better in SYSMEM due to the
high FS complexity, and so preferring SYSMEM tends to be a winning
policy until profiled mode reaches a state where it can surpass it.

Signed-off-by: Dhruv Mark Collins <mark@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37802>
---
 src/util/00-mesa-defaults.conf | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index 800233970d1..9b5dcfe8728 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -1411,6 +1411,12 @@ TODO: document the other workarounds.
                 alpha-to-coverage statically disabled.
             -->
             <option name="tu_emulate_alpha_to_coverage" value="true" />
+
+            <!--
+                DX games almost always tend to prefer SYSMEM over GMEM, so we just hardcode
+                this for DXVK and VKD3D-Proton.
+            -->
+            <option name="tu_autotune_algorithm" value="prefer_sysmem" />
         </engine>
 	<engine engine_name_match="vkd3d">
 	    <option name="tu_enable_softfloat32" value="true" />