Cookbook

  • 2021
  • 03/31/2021
  • Public Content

Early Depth/Stencil (Z/STC)

Metric Name
Description
GPU / Rasterizer: Slice <N> Rasterizer Output Ready
Percentage of time that input was available for early depth/stencil evaluation from rasterization unit.
GPU / Rasterizer / Early Depth Test: Slice <N> Post-Early Z Pixel Data Ready
Percentage of time that early depth/stencil had pixel data ready for dispatch.
When
GPU / Rasterizer: Slice <N> Rasterizer Output Ready
is above 80 percent, early depth/stencil throughput is low. A drop between
GPU / Rasterizer: Slice <N> Rasterizer Output Ready
and
GPU / Rasterizer / Early Depth Test: Slice <N> Post-Early Z Pixel Data Ready
of > 10 percent indicates an early depth/stencil could be a hotspot. Evaluating other stencil operations, improving geometry (that is, reducing spatial overlap), and improving memory locality can all improve performance.
 

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.