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iris: reduce redundant tile cache flushes

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We are flushing tile cache more often than is necessary. In
unified cache mode, tile cache flushing is expensive, evicting all
depth/pixel data from the L3$. This is only need for a handful of
cases, such as: making cpu or gpu changes globally visible
(e.g. map), fast color clears, or slow depth clears. Tile cache
flushing is a gen12+ feature.

Remove blanket flushing of tile cache on all depth/RT flushes.
Replace with selective tile cache flushing.

Improves performance in several workloads:
AztecRuins.ogl-high-offscreen-1440p 1%
UnigineValley.ogl-g2                1%
Dota 2 (replay Jul 2020).ogl-g2     1%
Counter-Strike GO.ogl-g2            1%
Manhattan.ogl-Off-19x10             2%
CarChase.ogl-Off-19x10              1%
Bioshock Infinite.ogl-g2            1%

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10217>
This commit is contained in:
Felix DeGrood
2021-03-29 17:11:42 -07:00
committed by Marge Bot
parent bfe2c5f667
commit c85ea824bc
7 changed files with 15 additions and 21 deletions
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1
src/gallium/drivers/iris/iris_context.h
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@@ -336,6 +336,7 @@ enum pipe_control_flags
#define PIPE_CONTROL_CACHE_FLUSH_BITS \
(PIPE_CONTROL_DEPTH_CACHE_FLUSH | \
PIPE_CONTROL_DATA_CACHE_FLUSH | \
PIPE_CONTROL_TILE_CACHE_FLUSH | \
PIPE_CONTROL_RENDER_TARGET_FLUSH)
#define PIPE_CONTROL_CACHE_INVALIDATE_BITS \