I work on lustre- and wanted to run Oprofile on ldlm to understand the latencies at each function. I am new to Oprofile and couldnt find any appropriate  tutorial.I also tried a few things like

opreport  --symbols  --image-path=lustre-  |  more
which gives me some info but not with respect to the functions in the directory .
Also  i am unable to  give

sudo opreport  -l  image:lustre-   which is supposed to display  the profiling for this binary  but i get the error message 

error: no sample files found: profile specification too strict ?

Please help me on this ... Thanks