How do you calculate communication overhead using VTune for an OpenMP program?
Sorry, thought you said MPI. :(
OpenMP overhead will be displayed in the results. Do you have some results? Can you share a screenshot?
Also, have you looked in the product documentation. There is a lot of info about using VTune Amplifier XE with OpenMP code. See the menu in the upper right:
For more complete information about compiler optimizations, see our Optimization Notice.