Alyssa Rosenzweig 2c446b6636 pan/mdg: Limit work registers for large workgroups ... When more than 8 registers are used, Midgard can only fit 64 threads in a thread group. For barriers to work properly, a threadgroup must fit an entire work group. The GL driver configures the hardware to have threadgroups the size of work groups. That means if more than 64 threads are used in a workgroup, and more than 8 registers are used, the hardware will fault spawning threads. To workaround this hardware limitation, we need to limit the number of work registers used depending on the size of the workgroup. Typically, the work group size is known at compile-time so that determination can usually be made without variants. To avoid variants, we make a pessimistic estimate in the case when it's not known at compile-time. shader-db shows 6 shaders affected. I expect that all of these would fault with DATA_INVALID_FAULT if they tried to execute before this patch, due to the oversize local size, and faulting is even slower than spilling ;-) Fixes dEQP-GLES31.functional.synchronization.* on Mali-T860. instructions HURT: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 121 -> 157 (29.75%) instructions HURT: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 121 -> 157 (29.75%) instructions HURT: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 141 -> 184 (30.50%) instructions HURT: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 141 -> 184 (30.50%) instructions HURT: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 513 -> 933 (81.87%) instructions HURT: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 505 -> 1002 (98.42%) bundles HURT: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 73 -> 116 (58.90%) bundles HURT: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 73 -> 116 (58.90%) bundles HURT: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 61 -> 97 (59.02%) bundles HURT: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 61 -> 97 (59.02%) bundles HURT: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 281 -> 701 (149.47%) bundles HURT: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 278 -> 775 (178.78%) registers helped: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 11 -> 8 (-27.27%) registers helped: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 11 -> 8 (-27.27%) registers helped: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 14 -> 8 (-42.86%) registers helped: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 14 -> 8 (-42.86%) registers helped: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 16 -> 8 (-50.00%) registers helped: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 16 -> 8 (-50.00%) threads helped: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) threads helped: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) threads helped: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) threads helped: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) threads helped: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) threads helped: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 1 -> 2 (100.00%) spills HURT: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 0 -> 5 spills HURT: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 0 -> 5 spills HURT: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 0 -> 8 spills HURT: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 0 -> 8 spills HURT: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 0 -> 112 spills HURT: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 0 -> 146 fills HURT: shaders/android/gfxbench/carchase/6.shader_test MESA_SHADER_COMPUTE: 0 -> 26 fills HURT: shaders/android/gfxbench/carchase/386.shader_test MESA_SHADER_COMPUTE: 0 -> 26 fills HURT: shaders/android/gfxbench/carchase/374.shader_test MESA_SHADER_COMPUTE: 0 -> 33 fills HURT: shaders/android/gfxbench/carchase/4-1.shader_test MESA_SHADER_COMPUTE: 0 -> 33 fills HURT: shaders/android/com.miHoYo.GenshinImpact/18.shader_test MESA_SHADER_COMPUTE: 0 -> 209 fills HURT: shaders/android/com.miHoYo.GenshinImpact/16.shader_test MESA_SHADER_COMPUTE: 0 -> 234 total instructions in shared programs: 1521691 -> 1522766 (0.07%) instructions in affected programs: 1542 -> 2617 (69.71%) helped: 0 HURT: 6 HURT stats (abs) min: 36.0 max: 497.0 x̄: 179.17 x̃: 43 HURT stats (rel) min: 29.75% max: 98.42% x̄: 50.13% x̃: 30.50% 95% mean confidence interval for instructions value: -49.36 407.69 95% mean confidence interval for instructions %-change: 17.14% 83.12% Inconclusive result (value mean confidence interval includes 0). total bundles in shared programs: 649296 -> 650371 (0.17%) bundles in affected programs: 827 -> 1902 (129.99%) helped: 0 HURT: 6 HURT stats (abs) min: 36.0 max: 497.0 x̄: 179.17 x̃: 43 HURT stats (rel) min: 58.90% max: 178.78% x̄: 94.01% x̃: 59.02% 95% mean confidence interval for bundles value: -49.36 407.69 95% mean confidence interval for bundles %-change: 36.20% 151.83% Inconclusive result (value mean confidence interval includes 0). total registers in shared programs: 90681 -> 90647 (-0.04%) registers in affected programs: 82 -> 48 (-41.46%) helped: 6 HURT: 0 helped stats (abs) min: 3.0 max: 8.0 x̄: 5.67 x̃: 6 helped stats (rel) min: 27.27% max: 50.00% x̄: 40.04% x̃: 42.86% 95% mean confidence interval for registers value: -8.03 -3.30 95% mean confidence interval for registers %-change: -50.95% -29.13% Registers are helped. total threads in shared programs: 55717 -> 55723 (0.01%) threads in affected programs: 6 -> 12 (100.00%) helped: 6 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. total spills in shared programs: 1108 -> 1392 (25.63%) spills in affected programs: 0 -> 284 helped: 0 HURT: 6 total fills in shared programs: 4721 -> 5282 (11.88%) fills in affected programs: 0 -> 561 helped: 0 HURT: 6 Cc: mesa-stable Closes: #7228 Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19092>		2022-10-17 18:56:13 +00:00
..
bifrost	panfrost: Remove load_kernel_input path	2022-10-05 16:09:21 +00:00
ci	pan/mdg: Limit work registers for large workgroups	2022-10-17 18:56:13 +00:00
drm-shim	panfrost: Advertise all textures in drm-shim	2022-04-26 17:47:49 +00:00
ds	meson: replace manual compiler flags with meson arguments	2022-08-24 22:13:19 +00:00
include	panfrost: Centralize our model list	2022-01-28 17:47:46 +00:00
lib	util/mesa/wide: Rename _SIMPLE_MTX_INITIALIZER_NP to SIMPLE_MTX_INITIALIZER	2022-10-14 03:27:41 +00:00
midgard	pan/mdg: Limit work registers for large workgroups	2022-10-17 18:56:13 +00:00
perf	panfrost: Separate core ID range from core count	2022-07-08 01:14:55 +00:00
shared	lima,panfrost: Use row stride for tiling routines	2022-05-03 14:20:15 +00:00
tools	panfrost: Add userspace crash dump decoder and analyser	2022-08-31 23:54:55 +00:00
util	panfrost: Honour flush-to-zero controls on Valhall	2022-09-19 17:22:58 +00:00
vulkan	panvk: Implement VK_KHR_descriptor_update_template	2022-09-17 03:32:29 +00:00
meson.build	panfrost: Add userspace crash dump decoder and analyser	2022-08-31 23:54:55 +00:00