The SET UNALIGNED command enables the collection of unaligned
    access fault data. After you enter the GO command with unaligned
    access fault data collection enabled, the Collector records in
    the performance data file every unaligned access fault that
    occurs during program execution. The Collector records the
    faulting virtual address and program location where it occured.

    You must collect stack PC information if you want to use a /MAIN_
    IMAGE, /CUMULATIVE or /STACK_DEPTH qualifier with the PLOT or
    TABULATE command in the Analyzer.