Basics of using oprofile - and why fedora libraries give you no symbols
Whilst trying to profile an application, everything I did failed to give me a breakdown inside the library calls. The basic process was
sudo optcontrol --reset
sudo optcontrol --start
sudo optcontrol --dump
opreport --symbols
This failed to read symbols from system libraries. Realisation that I might need some debug symbols dawned, so added
sudo yum --enablerepo=fedora-debuginfo install SDL-debuginfo
So symbols are now available, but still not working. Finally, I blundered into this
https://bugzilla.redhat.com/show_bug.cgi?id=746823
sudo prelink -u --all
Finally, I can see where all the time goes!
