2022-08-30 19:43:44 +01:00
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%YAML 1.2
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---
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2020-08-05 09:17:26 +01:00
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traces-db:
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2022-10-13 20:25:38 +01:00
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download-url: "https://s3.freedesktop.org/mesa-tracie-public/"
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2020-08-05 09:17:26 +01:00
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traces:
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2022-08-30 19:43:44 +01:00
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glmark2/desktop:windows=4:effect=blur:blur-radius=5:passes=1:separable=true-v2.trace:
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gl-virgl:
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checksum: 2fc8433c4a38b796173bda2bcfb924cc
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glmark2/jellyfish-v2.trace:
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gl-virgl:
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checksum: 2112a9a5519f39483735509f2ccc61af
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glxgears/glxgears-2-v2.trace:
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gl-virgl:
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checksum: f8eba0fec6e3e0af9cb09844bc73bdc8
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gputest/furmark-v2.trace:
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gl-virgl:
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checksum: 57ddd36b117adc9216c65c10d914a37e
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gputest/pixmark-piano-v2.trace:
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gl-virgl:
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checksum: 0d875bda7edc01698342b157c6f51500
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gputest/triangle-v2.trace:
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gl-virgl:
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checksum: 7812de00011a3a059892e36cea19c696
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humus/Portals-v2.trace:
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gl-virgl:
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checksum: b697edce7776f1afe294a7e80dfc013e
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0ad/0ad-v2.trace:
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gl-virgl:
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checksum: 350e0cf64d124ba98d90106f61775eb4
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glmark2/buffer:update-fraction=0.5:update-dispersion=0.9:columns=200:update-method=map:interleave=false-v2.trace:
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gl-virgl:
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checksum: f80431e56327354b4c88cc45c7e6633a
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glmark2/buffer:update-fraction=0.5:update-dispersion=0.9:columns=200:update-method=subdata:interleave=false-v2.trace:
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gl-virgl:
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checksum: 81e12bfa4ae3b7e63b01edbed71a5941
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glmark2/buffer:update-fraction=0.5:update-dispersion=0.9:columns=200:update-method=map:interleave=true-v2.trace:
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gl-virgl:
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checksum: 08e6d00fe3f4414ebfadc9e5f3c3bf0e
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glmark2/bump:bump-render=height-v2.trace:
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gl-virgl:
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checksum: 4d5211dfb0fd82a1a1dbb498dc2e5b8b
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glmark2/bump:bump-render=high-poly-v2.trace:
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gl-virgl:
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checksum: 4b4d4a4b7bb1341bbd0299c7eb3a6ac9
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glmark2/bump:bump-render=normals-v2.trace:
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gl-virgl:
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checksum: 832e5baf289b27dd84a665f1c85f57c2
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glmark2/conditionals:vertex-steps=0:fragment-steps=0-v2.trace:
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gl-virgl:
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checksum: b78f28d97b675fcc7649cced3930650a
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glmark2/conditionals:vertex-steps=0:fragment-steps=5-v2.trace:
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gl-virgl:
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checksum: d0782a516f06a6dddac4f1e1249f41e7
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glmark2/conditionals:vertex-steps=5:fragment-steps=0-v2.trace:
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gl-virgl:
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checksum: 1ae280a9c6cae495f2d272516a52167e
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glmark2/desktop:windows=4:effect=shadow-v2.trace:
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gl-virgl:
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checksum: d4b3e8338327859a029c7267c9916524
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glmark2/effect2d:kernel=0,1,0;1,-4,1;0,1,0;-v2.trace:
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gl-virgl:
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checksum: 35584880539813436d87bfcbe22cf59b
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glmark2/effect2d:kernel=1,1,1,1,1;1,1,1,1,1;1,1,1,1,1;-v2.trace:
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gl-virgl:
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checksum: b80963dae6ecf40c83bfb16943ef1011
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glmark2/function:fragment-steps=5:fragment-complexity=low-v2.trace:
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gl-virgl:
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checksum: da10cb29cab30c5c068e722b5da7c2e5
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glmark2/function:fragment-steps=5:fragment-complexity=medium-v2.trace:
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gl-virgl:
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checksum: 8e40504d9f2ead8c0d02604291bff1b6
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glmark2/build:use-vbo=false-v2.trace:
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gl-virgl:
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checksum: 024fc485e1f33461313c956ab1b73bdf
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glmark2/build:use-vbo=true-v2.trace:
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gl-virgl:
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checksum: 48c45d16cd410a71aea1a12a73e257d3
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glmark2/ideas:speed=10000-v2.trace:
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gl-virgl:
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checksum: db78cfb035213e31e1435b637b1a8f19
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glmark2/loop:vertex-steps=5:fragment-steps=5:fragment-loop=false-v2.trace:
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gl-virgl:
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checksum: 7fee2e864e015353ace431d51d41bb22
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glmark2/loop:vertex-steps=5:fragment-steps=5:fragment-uniform=false-v2.trace:
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gl-virgl:
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checksum: c87127a5c3256c1fe7c79f7931b8f9df
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glmark2/loop:vertex-steps=5:fragment-steps=5:fragment-uniform=true-v2.trace:
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gl-virgl:
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checksum: 5fec1f728bda86891db4243130546187
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glmark2/pulsar:quads=5:texture=false:light=false-v2.trace:
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gl-virgl:
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checksum: 3e0e6675fb65e00f9128138ff08c2634
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glmark2/refract-v2.trace:
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gl-virgl:
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checksum: cdadfee0518b964433d80c01329ec191
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glmark2/shading:shading=blinn-phong-inf-v2.trace:
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gl-virgl:
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checksum: 36b07dad759ca65e52f1abf1667e7ca8
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glmark2/shading:shading=cel-v2.trace:
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gl-virgl:
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checksum: cb41cf2531a06d65f6e4f442ab62ae8d
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glmark2/shading:shading=gouraud-v2.trace:
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gl-virgl:
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checksum: 3e5469d5038d7cc94ef3549ce9d8c385
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glmark2/shading:shading=phong-v2.trace:
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gl-virgl:
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checksum: e40abcbb4cfbbbfb499d4b0e6d668f41
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glmark2/shadow-v2.trace:
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gl-virgl:
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checksum: 2bb7290f8559ff93305c0e29f3d671e1
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glmark2/texture:texture-filter=linear-v2.trace:
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gl-virgl:
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checksum: 914fd8dddb23751d9a187a979d881abb
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glmark2/texture:texture-filter=mipmap-v2.trace:
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gl-virgl:
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checksum: ea1939f3c4e8dd9cdbc26d41f9dc891a
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glmark2/texture:texture-filter=nearest-v2.trace:
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gl-virgl:
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checksum: 1ae652bdebd1188ab912a800a4c37166
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gputest/gimark-v2.trace:
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gl-virgl:
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label: [crash]
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gputest/pixmark-julia-fp32-v2.trace:
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gl-virgl:
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nir/opt_algebraic: Fuse c - a * b to FMA
Algebraically it is clear that
-(a * b) + c = (-a) * b + c = fma(-a, b, c)
But this is not clear from the NIR
('fadd', ('fneg', ('fmul', a, b)), c)
Add rules to handle this case specially. Note we don't necessarily want
to solve this by pushing fneg into fmul, because the rule opt_algebraic
(not the late part where FMA fusing happens) specifically pulls fneg out
of fmul to push fneg up multiplication chains.
Noticed in the big glmark2 "terrain" shader, which has a cycle count
reduced by 22% on Mali-G57 thanks to having this pattern a ton and being
FMA bound.
BEFORE: 1249 inst, 16.015625 cycles, 16.015625 fma, ... 632 quadwords
AFTER: 997 inst, 12.437500 cycles, .... 504 quadwords
Results on the same shader on AGX are also quite dramatic:
BEFORE: 1294 inst, 8600 bytes, 50 halfregs, ...
AFTER: 1154 inst, 8040 bytes, 50 halfregs, ...
Similar rules apply for fabs.
v2: Use a loop over the bit sizes (suggested by Emma).
shader-db on Valhall (open + small subset of closed), results on Bifrost
are similar:
total instructions in shared programs: 167975 -> 164970 (-1.79%)
instructions in affected programs: 92642 -> 89637 (-3.24%)
helped: 492
HURT: 25
helped stats (abs) min: 1.0 max: 252.0 x̄: 6.25 x̃: 3
helped stats (rel) min: 0.30% max: 20.18% x̄: 3.21% x̃: 2.91%
HURT stats (abs) min: 1.0 max: 5.0 x̄: 2.80 x̃: 3
HURT stats (rel) min: 0.46% max: 9.09% x̄: 3.89% x̃: 3.37%
95% mean confidence interval for instructions value: -6.95 -4.68
95% mean confidence interval for instructions %-change: -3.08% -2.65%
Instructions are helped.
total cycles in shared programs: 10556.89 -> 10538.98 (-0.17%)
cycles in affected programs: 265.56 -> 247.66 (-6.74%)
helped: 88
HURT: 2
helped stats (abs) min: 0.015625 max: 3.578125 x̄: 0.20 x̃: 0
helped stats (rel) min: 0.65% max: 22.34% x̄: 5.65% x̃: 4.25%
HURT stats (abs) min: 0.0625 max: 0.0625 x̄: 0.06 x̃: 0
HURT stats (rel) min: 8.33% max: 12.50% x̄: 10.42% x̃: 10.42%
95% mean confidence interval for cycles value: -0.28 -0.12
95% mean confidence interval for cycles %-change: -6.30% -4.30%
Cycles are helped.
total fma in shared programs: 1582.42 -> 1535.06 (-2.99%)
fma in affected programs: 871.58 -> 824.22 (-5.43%)
helped: 502
HURT: 9
helped stats (abs) min: 0.015625 max: 3.578125 x̄: 0.09 x̃: 0
helped stats (rel) min: 0.60% max: 25.00% x̄: 5.46% x̃: 4.82%
HURT stats (abs) min: 0.015625 max: 0.0625 x̄: 0.03 x̃: 0
HURT stats (rel) min: 4.35% max: 12.50% x̄: 6.22% x̃: 4.35%
95% mean confidence interval for fma value: -0.11 -0.08
95% mean confidence interval for fma %-change: -5.58% -4.93%
Fma are helped.
total cvt in shared programs: 665.55 -> 665.95 (0.06%)
cvt in affected programs: 61.72 -> 62.12 (0.66%)
helped: 33
HURT: 43
helped stats (abs) min: 0.015625 max: 0.359375 x̄: 0.04 x̃: 0
helped stats (rel) min: 1.01% max: 25.00% x̄: 6.68% x̃: 4.35%
HURT stats (abs) min: 0.015625 max: 0.109375 x̄: 0.04 x̃: 0
HURT stats (rel) min: 0.78% max: 38.46% x̄: 10.85% x̃: 6.90%
95% mean confidence interval for cvt value: -0.01 0.02
95% mean confidence interval for cvt %-change: 0.23% 6.24%
Inconclusive result (value mean confidence interval includes 0).
total quadwords in shared programs: 93376 -> 91736 (-1.76%)
quadwords in affected programs: 25376 -> 23736 (-6.46%)
helped: 169
HURT: 1
helped stats (abs) min: 8.0 max: 128.0 x̄: 9.75 x̃: 8
helped stats (rel) min: 1.52% max: 33.33% x̄: 8.35% x̃: 8.00%
HURT stats (abs) min: 8.0 max: 8.0 x̄: 8.00 x̃: 8
HURT stats (rel) min: 25.00% max: 25.00% x̄: 25.00% x̃: 25.00%
95% mean confidence interval for quadwords value: -11.18 -8.11
95% mean confidence interval for quadwords %-change: -8.95% -7.36%
Quadwords are helped.
total threads in shared programs: 4697 -> 4701 (0.09%)
threads in affected programs: 4 -> 8 (100.00%)
helped: 4
HURT: 0
helped stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
helped stats (rel) min: 100.00% max: 100.00% x̄: 100.00% x̃: 100.00%
95% mean confidence interval for threads value: 1.00 1.00
95% mean confidence interval for threads %-change: 100.00% 100.00%
Threads are helped.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Marek Ol<C5><A1><C3><A1>k <marek.olsak@amd.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com> [v1]
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19312>
2022-10-26 03:29:31 +01:00
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checksum: 8b3584b1dd8f1d1bb63205564bd78e4e
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2022-08-30 19:43:44 +01:00
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gputest/pixmark-julia-fp64-v2.trace:
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gl-virgl:
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checksum: 73ccaff82ea764057fb0f93f0024cf84
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gputest/pixmark-volplosion-v2.trace:
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gl-virgl:
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checksum: aef0b32ce99a3b25d35304ca08032833
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gputest/plot3d-v2.trace:
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gl-virgl:
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checksum: 817a36e53edccdf946061315596e9cdd
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gputest/tessmark-v2.trace:
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gl-virgl:
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label: [skip, slow]
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humus/AmbientAperture-v2.trace:
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gl-virgl:
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checksum: b33fb8ee73b0c50b14822e170f15ab8a
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humus/CelShading-v2.trace:
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gl-virgl:
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checksum: 3629cba72bde53e4275a8365175fde83
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humus/DynamicBranching3-v2.trace:
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gl-virgl:
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checksum: 0236b28aa8b26fa60172d71bb040f2e9
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humus/HDR-v2.trace:
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gl-virgl:
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checksum: eab0801aadeae87ce31aa0d4ff55e8f8
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humus/RaytracedShadows-v2.trace:
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gl-virgl:
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checksum: df074a376fd3e7abc4dffdd191db8f4b
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humus/VolumetricFogging2-v2.trace:
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gl-virgl:
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checksum: 2eb71553403ad8e0171abc9dc25e5bc1
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itoral-gl-terrain-demo/demo-v2.trace:
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gl-virgl:
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checksum: 37780a6eaa38a55700e8207e89009f56
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neverball/neverball-v2.trace:
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gl-virgl:
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nir: Be smarter fusing ffma
If there is a single use of fmul, and that single use is fadd, it makes
sense to fuse ffma, as we already do. However, if there are multiple
uses, fusing may impede code gen. Consider the source fragment:
a = fmul(x, y)
b = fadd(a, z)
c = fmin(a, t)
d = fmax(b, c)
The fmul has two uses. The current ffma fusing is greedy and will
produce the following "optimized" code.
a = fmul(x, y)
b = ffma(x, y, z)
c = fmin(a, t)
d = fmax(b, c)
Actually, this code is worse! Instead of 1 fmul + 1 fadd, we now have 1
fmul + 1 ffma. In effect, two multiplies (and a fused add) instead of
one multiply and an add. Depending on the ISA, that could impede
scheduling or increase code size. It can also increase register
pressure, extending the live range.
It's tempting to gate on is_used_once, but that would hurt in cases
where we really do fuse everything, e.g.:
a = fmul(x, y)
b = fadd(a, z)
c = fadd(a, t)
For ISAs that fuse ffma, we expect that 2 ffma is faster than 1 fmul + 2
fadd. So what we really want is to fuse ffma iff the fmul will get
deleted. That occurs iff all uses of the fmul are fadd and will
themselves get fused to ffma, leaving fmul to get dead code eliminated.
That's easy to implement with a new NIR search helper, checking that all
uses are fadd.
shader-db results on Mali-G57 [open shader-db + subset of closed]:
total instructions in shared programs: 179491 -> 178991 (-0.28%)
instructions in affected programs: 36862 -> 36362 (-1.36%)
helped: 190
HURT: 27
total cycles in shared programs: 10573.20 -> 10571.75 (-0.01%)
cycles in affected programs: 72.02 -> 70.56 (-2.02%)
helped: 28
HURT: 1
total fma in shared programs: 1590.47 -> 1582.61 (-0.49%)
fma in affected programs: 319.95 -> 312.09 (-2.46%)
helped: 194
HURT: 1
total cvt in shared programs: 812.98 -> 813.03 (<.01%)
cvt in affected programs: 118.53 -> 118.58 (0.04%)
helped: 65
HURT: 81
total quadwords in shared programs: 98968 -> 98840 (-0.13%)
quadwords in affected programs: 2960 -> 2832 (-4.32%)
helped: 20
HURT: 4
total threads in shared programs: 4693 -> 4697 (0.09%)
threads in affected programs: 4 -> 8 (100.00%)
helped: 4
HURT: 0
v2: Update trace checksums for virgl due to numerical differences.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18814>
2022-10-15 18:39:26 +01:00
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checksum: 0b8ae7dd4f7f26c3278ded8a5694b983
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2022-08-30 19:43:44 +01:00
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pathfinder/canvas_moire-v2.trace:
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gl-virgl:
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checksum: 25ba8f18274126670311bd3ffe058f74
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pathfinder/canvas_text_v2-v2.trace:
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gl-virgl:
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checksum: a1446d0c42a78771240fca6f3b1e10d8
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pathfinder/demo-v2.trace:
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gl-virgl:
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checksum: 0702a66c415cfc13d5bae8bec08402cf
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paraview/pv-manyspheres-v2.trace:
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gl-virgl:
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label: [crash]
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text: |-
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src/mesa/main/arrayobj.c:800:_mesa_update_vao_derived_arrays: Assertion
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`attrib->_EffRelativeOffset < binding->Stride failed. running these.
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paraview/pv-waveletcontour-v2.trace:
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gl-virgl:
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label: [crash]
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paraview/pv-waveletvolume-v2.trace:
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gl-virgl:
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checksum: f4af4067b37c00861fa5911e4c0a6629
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supertuxkart/supertuxkart-mansion-egl-gles-v2.trace:
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gl-virgl:
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nir/opt_algebraic: Fuse c - a * b to FMA
Algebraically it is clear that
-(a * b) + c = (-a) * b + c = fma(-a, b, c)
But this is not clear from the NIR
('fadd', ('fneg', ('fmul', a, b)), c)
Add rules to handle this case specially. Note we don't necessarily want
to solve this by pushing fneg into fmul, because the rule opt_algebraic
(not the late part where FMA fusing happens) specifically pulls fneg out
of fmul to push fneg up multiplication chains.
Noticed in the big glmark2 "terrain" shader, which has a cycle count
reduced by 22% on Mali-G57 thanks to having this pattern a ton and being
FMA bound.
BEFORE: 1249 inst, 16.015625 cycles, 16.015625 fma, ... 632 quadwords
AFTER: 997 inst, 12.437500 cycles, .... 504 quadwords
Results on the same shader on AGX are also quite dramatic:
BEFORE: 1294 inst, 8600 bytes, 50 halfregs, ...
AFTER: 1154 inst, 8040 bytes, 50 halfregs, ...
Similar rules apply for fabs.
v2: Use a loop over the bit sizes (suggested by Emma).
shader-db on Valhall (open + small subset of closed), results on Bifrost
are similar:
total instructions in shared programs: 167975 -> 164970 (-1.79%)
instructions in affected programs: 92642 -> 89637 (-3.24%)
helped: 492
HURT: 25
helped stats (abs) min: 1.0 max: 252.0 x̄: 6.25 x̃: 3
helped stats (rel) min: 0.30% max: 20.18% x̄: 3.21% x̃: 2.91%
HURT stats (abs) min: 1.0 max: 5.0 x̄: 2.80 x̃: 3
HURT stats (rel) min: 0.46% max: 9.09% x̄: 3.89% x̃: 3.37%
95% mean confidence interval for instructions value: -6.95 -4.68
95% mean confidence interval for instructions %-change: -3.08% -2.65%
Instructions are helped.
total cycles in shared programs: 10556.89 -> 10538.98 (-0.17%)
cycles in affected programs: 265.56 -> 247.66 (-6.74%)
helped: 88
HURT: 2
helped stats (abs) min: 0.015625 max: 3.578125 x̄: 0.20 x̃: 0
helped stats (rel) min: 0.65% max: 22.34% x̄: 5.65% x̃: 4.25%
HURT stats (abs) min: 0.0625 max: 0.0625 x̄: 0.06 x̃: 0
HURT stats (rel) min: 8.33% max: 12.50% x̄: 10.42% x̃: 10.42%
95% mean confidence interval for cycles value: -0.28 -0.12
95% mean confidence interval for cycles %-change: -6.30% -4.30%
Cycles are helped.
total fma in shared programs: 1582.42 -> 1535.06 (-2.99%)
fma in affected programs: 871.58 -> 824.22 (-5.43%)
helped: 502
HURT: 9
helped stats (abs) min: 0.015625 max: 3.578125 x̄: 0.09 x̃: 0
helped stats (rel) min: 0.60% max: 25.00% x̄: 5.46% x̃: 4.82%
HURT stats (abs) min: 0.015625 max: 0.0625 x̄: 0.03 x̃: 0
HURT stats (rel) min: 4.35% max: 12.50% x̄: 6.22% x̃: 4.35%
95% mean confidence interval for fma value: -0.11 -0.08
95% mean confidence interval for fma %-change: -5.58% -4.93%
Fma are helped.
total cvt in shared programs: 665.55 -> 665.95 (0.06%)
cvt in affected programs: 61.72 -> 62.12 (0.66%)
helped: 33
HURT: 43
helped stats (abs) min: 0.015625 max: 0.359375 x̄: 0.04 x̃: 0
helped stats (rel) min: 1.01% max: 25.00% x̄: 6.68% x̃: 4.35%
HURT stats (abs) min: 0.015625 max: 0.109375 x̄: 0.04 x̃: 0
HURT stats (rel) min: 0.78% max: 38.46% x̄: 10.85% x̃: 6.90%
95% mean confidence interval for cvt value: -0.01 0.02
95% mean confidence interval for cvt %-change: 0.23% 6.24%
Inconclusive result (value mean confidence interval includes 0).
total quadwords in shared programs: 93376 -> 91736 (-1.76%)
quadwords in affected programs: 25376 -> 23736 (-6.46%)
helped: 169
HURT: 1
helped stats (abs) min: 8.0 max: 128.0 x̄: 9.75 x̃: 8
helped stats (rel) min: 1.52% max: 33.33% x̄: 8.35% x̃: 8.00%
HURT stats (abs) min: 8.0 max: 8.0 x̄: 8.00 x̃: 8
HURT stats (rel) min: 25.00% max: 25.00% x̄: 25.00% x̃: 25.00%
95% mean confidence interval for quadwords value: -11.18 -8.11
95% mean confidence interval for quadwords %-change: -8.95% -7.36%
Quadwords are helped.
total threads in shared programs: 4697 -> 4701 (0.09%)
threads in affected programs: 4 -> 8 (100.00%)
helped: 4
HURT: 0
helped stats (abs) min: 1.0 max: 1.0 x̄: 1.00 x̃: 1
helped stats (rel) min: 100.00% max: 100.00% x̄: 100.00% x̃: 100.00%
95% mean confidence interval for threads value: 1.00 1.00
95% mean confidence interval for threads %-change: 100.00% 100.00%
Threads are helped.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Marek Ol<C5><A1><C3><A1>k <marek.olsak@amd.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com> [v1]
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19312>
2022-10-26 03:29:31 +01:00
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checksum: cc7092975dd6c9064aa54cd7f18053b6
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2022-08-30 19:43:44 +01:00
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xonotic/xonotic-keybench-high-v2.trace:
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gl-virgl:
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checksum: f3b184bf8858a6ebccd09e7ca032197e
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valve/counterstrike-v2.trace:
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gl-virgl:
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checksum: 3bc0e0e39cb3c29f6d76ff07f1f02860
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valve/counterstrike-source-v2.trace:
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gl-virgl:
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checksum: f8e5b19142007be14ce6d18d25ef329d
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valve/half-life-2-v2.trace:
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gl-virgl:
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checksum: 6099a13f48bf090ee1d768f98208da70
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valve/portal-2-v2.trace:
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gl-virgl:
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checksum: 7489a8412ee2bca45431d208e0006a3e
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supertuxkart/supertuxkart-antediluvian-abyss.rdc:
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gl-virgl:
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label: [crash]
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supertuxkart/supertuxkart-menu.rdc:
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gl-virgl:
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label: [crash]
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supertuxkart/supertuxkart-ravenbridge-mansion.rdc:
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gl-virgl:
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label: [crash]
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godot/Material Testers.x86_64_2020.04.08_13.38_frame799.rdc:
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gl-virgl:
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checksum: 232eb48d6689c0117e3cc1660af7f32d
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ror/ror-default.trace:
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gl-virgl:
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label: [crash]
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text: |-
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../src/mesa/main/arrayobj.c:800:_mesa_update_vao_derived_arrays:
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Assertion `attrib->_EffRelativeOffset < binding->Stride' failed.
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nheko/nheko-colors.trace:
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gl-virgl:
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2022-09-03 19:54:40 +01:00
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label: [no-perf]
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2022-08-30 19:43:44 +01:00
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checksum: 3a12c08087e16cfae4729f4e9d6c9387
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warzone2100/warzone2100-default.trace:
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gl-virgl:
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checksum: 1fd3f9b5e5a711bdfac49dc03912e1de
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