ISP Pixel Load

What does this counter show?

Percentage of the time that the ISP pixel-processing is busy.

What does a high value mean?

It would mean that a large quantity of non-visible (non-shaded) pixels are being processed. These may be hidden due to:

  • The depth/stencil test (e.g. hidden behind an opaque object).
  • A process may be rendering triangles that update only the depth/stencil buffer (and not any colour buffer).