/FORKLOCK=forklock
       /NOFORKLOCK

    The /FORKLOCK=forklock qualifier specifies the tracing of
    a specific forklock, for example, /FORKLOCK=IOLOCK8 or
    /FORKLOCK=IPL8.

    The /NOFORKLOCK qualifier disables forklock tracing and does not
    collect any forklock data. By default, all forks are traced.