GLExpert is a component of NVPerfKit that helps OpenGL developers by identifying errors and performance issues.

GLExpert is controlled using the GLExpert tab of the NVIDIA Developer Control panel. You can choose what level of debugging information to report, as well as where the output is sent.

GLExpert provides the following features:

• Outputs to console/stdout or debugger
• Displays different groups and levels of information detail
• OpenGL errors: print as they arise
• Software Fallbacks: indicate when the driver is using software emulation
• GPU Programs: print errors during compilation or linking
• VBOs: show where buffers reside along with mapping details
• FBOs: print reasons why a configuration is unsupported

You can expect even more functionality in the future as GLExpert's feature list grows with driver advances.

To learn more about GLExpert, we recommend that you take a look at our "GPU Performance Tuning with NVIDIA Performance Tools" talk from GDC 2006.