Using tools such as:
I am starting to use this tool and trying to find the best combinations, examples to get the most out of profiling.
Thanks
Look at the KCachegrind - it's a profile data visualization tool.
KCachegrind visualize data files generated by Callgrind profiler tool. But with conversion scripts, KCachegrind is able to visualize output of other profilers like OProfile.
When you install KCachegrind using a package manager (yum, apt-get, etc.) you get a tool called op2calltree which transforms Oprofile's output to KCachegrind's format.