Intel HD Graphics DirectX Developer's Guide (Sandy Bridge)

Appendix: Enhancing Graphics Performance on Intel® Processor Graphics with Intel® GPA
Figure 10 A typical Scene in Demigod: Graphics Detail is on the Lowest Game Setting
2.2.3 Stage 3: Isolating the Cause
In some cases enabling efforts are supported by the presence of source code.
GPG/Demigod was one such case allowing for a detailed exploration of the code and
how it matched up to what was going on in the rendered scene. Much like Intel®
VTune Performance Analyzer can identify hot spots in code, the Intel® GPA Frame
Analyzer is able to match up code hot spots to the unit of time captured within a
sample set of frames and also work within a single rendered frame. The Intel® GPA
Frame Analyzer allows us to further explore the GPU performance of the game in
greater detail. When we first started analysis we did not see high bus utilization which
would be expected in cases where the GPU is handling too large of a vertex buffer so
it was likely that the issue was elsewhere on the GPU side. The Intel® GPA Frame
Analyzer provides a window into what is going on in the scene.
How to maximize graphics performance on Intel® Integrated Graphics 57