Early Depth/Stencil (Z/STC)
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.