VMS Help V73 Features, Programming Features, SDA Commands for Spinlock Tracing, SPL_SHOW_TRACE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    This command displays spinlock tracing information. Qualifiers
    for the SPL SHOW TRACE Command shows the qualifiers for this
    command.

    Table 5-3 Qualifiers for the SPL SHOW TRACE Command

    Qualifier          Meaning

    /SPINLOCK=spinlock Specifies the display of a specific
                       spinlock, for example, /SPINLOCK=LCKMGR or
                       /SPINLOCK=SCHED.
    /NOSPINLOCK        Specifies that no spinlock trace information
                       be displayed. If omitted, all spinlock trace
                       entries are decoded and displayed.
    /FORKLOCK=forklock Specifies the display of a specific
                       forklock, for example, /FORKLOCK=IOLOCK8 or
                       /FORKLOCK=IPL8.
    /NOFORKLOCK        Specifies that no forklock trace information
                       be displayed. If omitted, all fork trace
                       entries are decoded and displayed.
    /ACQUIRE           Displays any spinlock acquisitions.
    /NOACQUIRE         Ignores any spinlock acquisitions.
    /RELEASE           Displays any spinlock releases.
    /NORELEASE         Ignores any spinlock releases.
    /WAIT              Displays any spinwait operations.
    /NOWAIT            Ignores any spinwait operations.
    /FRKDSPTH          Displays all invocations of fork routines
                       within the fork dispatcher. This is the
                       default.
    /NOFRKDSPTH        Ignores all of the operations of the /FRKDSPTH
                       qualifier.
    /FRKEND            Displays all returns from fork routines within
                       the fork dispatcher. This is the default.
    /NOFRKEND          Ignores all operations of the /FRKEND
                       qualifier.
    /SUMMARY           Stops the entire trace buffer and displays a
                       summary of all spinlock and forklock activity.
                       It also displays the top ten callers.
    /CPU=n             Specifies the display of information for a
                       specific CPU only, for example, /CPU=5 or
                       /CPU=PRIMARY. By default, all trace entries
                       for all CPUs are displayed.
    /TOP=n             Displays a different number other than the
                       top ten callers or fork PC. By default, the
                       top ten are displayed. This qualifier is only
                       useful when you also specify the /SUMMARY
                       qualifier.