• Call graph profiling of ASP .NET applications using a 64-bit operating system on an Intel® EM64T system may cause the operating system to reboot. The problem is due to the fact that the VTune analyzer tries to shutdown some IIS-related services after collection finishes. To workaround this problem, never agree to terminate processes/services when performing a call graph session for an ASP .NET application.
  
  
• Call graph profiling of ASP .NET applications may not work on systems with .NET CLR 2.0 Beta2 installed. This version of .NET CLR is available on Windows Vista* Beta 1 and Windows* Longhorn Server Beta 1 by default. The application does not start, Internet Explorer shows error "Server Application Unavailable." The problem does not appear on released version of .NET CLR 2.0, hence the workaround is to upgrade the Beta2 version to a released one.
  
  
• Call graph profiling of ASP .NET applications in mixed mode does not instrument native modules on 64 bit operating systems running on Intel EM64T systems and Itanium® architecture systems. Therefore, you will only see the results for jit modules.
  
  
• Call graph support is based on binary instrumentation. There can be several reasons why a function may not be instrumented:
  • There is no symbol for the function in the binary.
  • When the optimizing compiler uses jump to call to another function (instead of a call instruction), or the same function has multiple entry points. In this case, the two functions are treated as one, and only one of the entry points will be instrumented.
  • The first basic block of a function is smaller than 5 bytes.
  • For 64-bit operating systems running on Intel® processors with Intel EM64T, the module does not have enough free space to insert instrumentation code.
  
  
• Call graph activities created in VTune analyzer 6.1 cannot be re-run using this version of the VTune analyzer. The results can be opened and analyzed successfully, but to get new results, you need to recreate the Activity.

Operating System:

Windows* XP Professional

This applies to:

Intel® VTune™ Performance Analyzer for Windows*