drirc: setup anv_assume_full_subgroups=16 for UnrealEngine5.1

We set max subgroup size as 16 for 'UnrealEngine5.1', this improves a
customer benchmark by 50% on A750.

Cc: mesa-stable
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26385>
(cherry picked from commit 012b6fbe632e190138f864ae4c6c6abe4c0ee81a)

diff --git a/.pick_status.json b/.pick_status.json
index 736954d..4a72827 100644 (file)
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -584,7 +584,7 @@
         "description": "drirc: setup anv_assume_full_subgroups=16 for UnrealEngine5.1",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null

diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index 79baae3..cb41cc5 100644 (file)
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -1178,6 +1178,7 @@ TODO: document the other workarounds.
         <!-- Disable FCV optimization for Unreal Engine 5.1 workloads. -->
         <engine engine_name_match="UnrealEngine5.1">
             <option name="anv_disable_fcv" value="true" />
+            <option name="anv_assume_full_subgroups" value="16" />
         </engine>
     </device>
     <device driver="dzn">