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radv: Enable NGG culling by default on GFX10.3, add nonggc debug flag.

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This commit enables NGG culling on all GFX10.3 GPUs by default.

A new debug flag environment variable RADV_DEBUG=nonggc is added to
disable this feature on GPUs where it is enabled by default.

The previous perf test flag RADV_PERFTEST=nggc will not be needed on
GFX10.3 anymore but it can still be used to enable the feature on
GPUs where it isn't on by default.

Totals from 58239 (45.27% of 128647) affected shaders:
VGPRs: 1989752 -> 2049408 (+3.00%); split: -3.21%, +6.21%
SpillSGPRs: 675 -> 883 (+30.81%); split: -78.07%, +108.89%
CodeSize: 72205968 -> 153572764 (+112.69%)
LDS: 0 -> 227125248 (+inf%)
MaxWaves: 1614598 -> 1646934 (+2.00%); split: +3.08%, -1.08%
Instrs: 14202239 -> 29654042 (+108.80%)
Latency: 87986508 -> 136960419 (+55.66%); split: -0.23%, +55.89%
InvThroughput: 14444832 -> 21141875 (+46.36%); split: -0.01%, +46.37%
VClause: 340794 -> 493067 (+44.68%); split: -1.33%, +46.01%
SClause: 520983 -> 738636 (+41.78%); split: -0.25%, +42.03%
Copies: 775639 -> 2787382 (+259.37%)
Branches: 296911 -> 1225431 (+312.73%)
PreSGPRs: 1316896 -> 2057270 (+56.22%); split: -0.14%, +56.36%
PreVGPRs: 1473558 -> 1658432 (+12.55%); split: -1.44%, +13.99%

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13086>
This commit is contained in:
Timur Kristóf
2021-09-28 16:21:42 +02:00
committed by Marge Bot
parent 5317874f91
commit 52413a93af
8 changed files with 22 additions and 12 deletions
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docs/relnotes/new_features.txt
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@@ -16,3 +16,4 @@ VK_KHR_shader_subgroup_extended_types on lavapipe
VK_KHR_spirv_1_4 on lavapipe
Experimental raytracing support on RADV
VK_KHR_synchronization2 on Intel
NGG shader based culling is now enabled by default on GFX10.3 on RADV.