Library /sys$common/syshlp/SDA.HLB  —  SPL Extension, SHOW  TRACE
    Displays spinlock tracing information.

    Format

      SPL SHOW TRACE  [ /[NO]ACQUIRE | /CPU=n

                      | /[NO]FORKLOCK=forklock | /[NO]FRKDSPTH

                      | /[NO]FRKEND | /RATES | /[NO]RELEASE

                      | /[NO]SPINLOCK=spinlock | /SUMMARY

                      | /TOP=n | /TOTALS | /[NO]WAIT ]

1  –  Qualifiers

1.1    /ACQUIRE 

       /ACQUIRE
       /NOACQUIRE

    The /ACQUIRE qualifier displays any spinlock acquisitions.

    The /NOACQUIRE qualifier ignores any spinlock acquisitions.

1.2    /CPU 

       /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.

1.3    /FORKLOCK 

       /FORKLOCK=forklock
       /NOFORKLOCK

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

    The /NOFORKLOCK qualifier specifies that no forklock trace
    information be displayed. By default, all fork trace entries
    are decoded and displayed.

1.4    /FRKDSPTH 

       /FRKDSPTH
       /NOFRKDSPTH

    The /FRKDSPTH qualifier displays all invocations of fork routines
    within the fork dispatcher. This is the default.

    The /NOFRKDSPTH qualifier ignores all of the operations of the
    /FRKDSPTH qualifier.

1.5    /FRKEND 

       /FRKEND
       /NOFRKEND

    The /FRKEND qualifier displays all returns from fork routines
    within the fork dispatcher. This is the default.

    The /NOFRKEND qualifier ignores all operations of the /FRKEND
    qualifier.

1.6    /RATES 

    Reports activity as a rate per second and hold/spin time as a
    percentage of time. This is the default.

1.7    /RELEASE 

       /RELEASE
       /NORELEASE

    The /RELEASE qualifier displays any spinlock releases.

    The /NORELEASE qualifier ignores any spinlock releases.

1.8    /SPINLOCK 

       /SPINLOCK=spinlock
       /NOSPINLOCK

    The /SPINLOCK=n qualifier specifies the display of a specific
    spinlock, for example, /SPINLOCK=LCKMGR or /SPINLOCK=SCHED.

    /NOSPINLOCK specifies that no spinlock trace information be
    displayed. By default, all spinlock trace entries are decoded
    and displayed.

1.9    /SUMMARY 

    Steps through the entire trace buffer and displays a summary of
    all spinlock and forklock activity. It also displays the top ten
    callers.

1.10    /TOP 

       /TOP=n

    Displays a different number other than the top ten callers or
    fork PCs. By default, the top ten are displayed. This qualifier
    is useful only when you also specify /SUMMARY.

1.11    /TOTALS 

    Reports activity as a count and hold/spin time as cycles.

1.12    /WAIT 

       /WAIT
       /NOWAIT

    The /WAIT qualifier displays any spinwait operations.

    The /NOWAIT qualifier ignores any spinwait operations.
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