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907cc49c32
We were previously assuming that potentially stale divergence data was
valid. On some paths the register pressure estimator would recalculate
this, but, as is obvious from the results, not always.
v2: Add an assertion in brw_from_nir_emit_impl to ensure we don't end
up in this situation again.
v3: Call nir_divergence_analysis from
brw_nir_lower_deferred_urb_writes. This fixes assertion failures (the
assertion added in v2) in basically every graphics shader. The
altnerative was to call it from brw_compile_vs, brw_compile_gs, and
brw_compile_tes.
shader-db:
All Intel platformms had similar results. (Lunar Lake shown)
total instructions in shared programs: 17050403 -> 17054033 (0.02%)
instructions in affected programs: 296344 -> 299974 (1.22%)
helped: 0 / HURT: 376
total cycles in shared programs: 876063126 -> 875817316 (-0.03%)
cycles in affected programs: 78627328 -> 78381518 (-0.31%)
helped: 91 / HURT: 276
LOST: 1
GAINED: 10
fossil-db:
All Intel platformms had similar results. (Lunar Lake shown)
Totals:
Instrs: 913770429 -> 916075391 (+0.25%); split: -0.00%, +0.26%
CodeSize: 14647414640 -> 14726176320 (+0.54%); split: -0.02%, +0.56%
Cycle count: 102308091527 -> 102290664775 (-0.02%); split: -0.26%, +0.24%
Spill count: 3469632 -> 3469124 (-0.01%); split: -0.08%, +0.07%
Fill count: 5007038 -> 4998674 (-0.17%); split: -0.51%, +0.34%
Max live registers: 192568853 -> 192595355 (+0.01%); split: -0.00%, +0.02%
Max dispatch width: 48713168 -> 48712880 (-0.00%); split: +0.00%, -0.00%
Non SSA regs after NIR: 140252767 -> 140253718 (+0.00%)
Totals from 223099 (11.11% of 2007586) affected shaders:
Instrs: 314077245 -> 316382207 (+0.73%); split: -0.01%, +0.75%
CodeSize: 5335583824 -> 5414345504 (+1.48%); split: -0.06%, +1.54%
Cycle count: 45868025821 -> 45850599069 (-0.04%); split: -0.58%, +0.54%
Spill count: 2062649 -> 2062141 (-0.02%); split: -0.14%, +0.11%
Fill count: 3343019 -> 3334655 (-0.25%); split: -0.76%, +0.51%
Max live registers: 36762498 -> 36789000 (+0.07%); split: -0.02%, +0.09%
Max dispatch width: 5542224 -> 5541936 (-0.01%); split: +0.03%, -0.03%
Non SSA regs after NIR: 43727142 -> 43728093 (+0.00%)
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> [v1]
Fixes:
|
||
|---|---|---|
| .. | ||
| blorp | ||
| ci | ||
| common | ||
| compiler | ||
| decoder | ||
| dev | ||
| ds | ||
| executor | ||
| genxml | ||
| isl | ||
| mda | ||
| nullhw-layer | ||
| perf | ||
| shaders | ||
| tools | ||
| vulkan | ||
| vulkan_hasvk | ||
| meson.build | ||