Profiling issue (OT)

[MR ZenWiz]

This is not Ubuntu specific, but I'm not sure where to go on it.

I am trying to profile a large scale Linux business application with
gprof and I've hit a rather strange problem.

The app is a backup and restore application that handles huge
datasets.  I'm trying to track down some performance issues with it,
but whenever the profiling version of the app runs on the full size
dataset, it hangs at the end doing I have no idea what.  The
non-profiling version never shows this problem.

What would be the best place to look for issues like this?  I've asked
at FSF (since it's a gcc/g++ compile option) and someone who posted an
article about gprof that I may know, but Google hasn't been terribly
helpful so far.

Thanks!

MR