I'm working on VTune on a quite heavy software to investigate multithreading issues. While VTune is instrumenting DLLs it gets stuck at 73 percent.It is never twice the same DLL on wich it stop instrumenting ( there is up to 300 DLL but most of them are not forcefully loaded). I've tried to find information on this kind of issue without success. I really need to find a solution to progress in my internship.
For that many DLLs, you should set the default instrumentation level to Exports (see Configure menu -> Options, then Call Graph -> Collector: Default Instrumentation Levels, select Exports for User DLLs, and System DLLs, if it is not already, from the drop down list). Then, clear the cache (see Cache Directories under Collector in Options), and re-run the activity.
Basically, you want to start at the lowest level and incrementally increase instrumentation on the modules you are interested in. Oftentimes, the problem will be in a third-party DLL that you don't need to instrument, anyway, so reducing the default instrumentation level can help to get around a problematic DLL.