Symptom(s):
The Source only and Mixed buttons are disabled

Cause:
The VTune™ Performance Analyzer could not locate the source file, or line number information is not available. Source view can only display the disassembly code. Sampling requires line number and symbol information (debug information) when drilling down from a hotspot view to the source view of a module.

Solution:
Ensure before running an Activity configured with the sampling collector, that debug information is compiled with the binary file. If you do not supply this information, the analyzer disassembles the binary file and displays this information in the source view. It cannot display the source code itself. Please refer to the online help on generating symbol information.

Relevant Information:
Sourceview