Oprofile Drawbacks

• Limited number of processors supported

• Root access required to use

• Not designed for concurrent users

• Does not show critical path through code

• Does not show problems with locks/semphores

• Does not provide call graph information

• Inprecise sampling mechanism due to out of order execution of instructions

• Segmenting measurements awkward, e.g. Focus on region of samples (start and end of benchmark program)

Notes: