• 01/27/2020
  • Public Content

Pixel Back-End - Color Write and Post-Pixel Shader (PS) Operations (PBE)

Metric Name
GPU / 3D Pipe: Slice <N> PS Output Available
Percentage of time that color data is ready from pixel shading to be processed by the pixel back-end for slice ‘N’.
GPU / 3D Pipe: Slice <N> Pixel Values Ready
Percentage of time that pixel data is ready in the pixel back-end (following post-PS operations) for color write.
There are two stages in the pixel back-end (PBE): post-pixel shader (PS) operations and color write. Post-PS operations occur after the color data is ready from pixel shading to the back-end, and can include blending, late depth/stencil, and so on. Following post-PS operations, the final color data is ready for write-out to the render target.
If the
GPU / 3D Pipe: Slice <N> PS Output Available
is greater than 80 percent, the pixel back-end is probably the primary hotspot, either in post-PS operations or color write. To check, compare Output Available with Pixel Values Ready. If Output Available is >10 percent more than Pixel Values Ready, the post-PS operations are the primary hotspot. Otherwise the primary hotspot is color write.
If there’s a post-PS hotspot, adjust the algorithm or optimize the post-PS operations. To improve color write, improve the locality of writes (that is, geometry ordering, and so on) by using other render target formats, dimensions, and optimizations.

Product and Performance Information


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