Intel® VTune™ Performance Analyzer

Event Based Sampling - are you ready?

Event based sampling uses counters on the Intel processors to detect what your software is doing. This is helpful for tuning and improving software performance. Typical hotspot analysis shows you where your software spends most of the execution time, but event based sampling allows you to see not just what sections of your application take the most time but why and what it is doing.

To make sure that all functions show up in call graph


Problem : 

During generation of call graph, Instrumentation Level to “All functions” is specified (function in the function list is checked), but the function does not show up in the call graph function list after data collection is done.


Resolution : 

It is possible that application compiled without debug information or base relocation information, so try to recompile executable file with these options.

Example (Windows*):
  • Linux*
  • Microsoft Windows* (XP, Vista, 7)
  • Intel® VTune™ Performance Analyzer
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