Having obtained the prog.Addrs and prog.Counts files which contain information on addresses of blocks and counts of the blocks respectively, by using pixie, we then use the prof utilty to analyze this profiling data and produce a listing. This listing typically gives information on how many times a given procedure is invoked, what is it's execution time, lines or procedures which did not execute and othe information used for optimization. The use of prof command is explained below using an example. For more details do a man prof.