Displays the multiprocessing synchronization data structures.

    Format

      SHOW SPINLOCKS  {[name]|/ADDRESS=expression|/INDEX=expression}

                      [{/BRIEF | /COUNTS | /FULL}]

                      [/CACHED_PCB | /DEVICE | /DYNAMIC | /MAILBOX

                      | /MISCELLANEOUS | /OWNED | /PCB | /PORT

                      | /PSHARED | /STATIC]

1  –  Parameter

 name

    Name of the spinlock to be displayed. Device spinlock names
    are of the form node$lock, where node indicates the OpenVMS
    Cluster node name and lock indicates the device and controller
    identification (for example, HAETAR$DUA). If there is no OpenVMS
    Cluster node name, the dollar sign ($) is also skipped (for
    example, DUA).

2  –  Qualifiers

2.1    /ADDRESS

       /ADDRESS=expression

    Displays the spinlock at the address specified in expression.
    You can use the /ADDRESS qualifier to display a specific device,
    mailbox, PCB, cached PCB, or process-shared spinlock; however,
    the name of the spinlock may be listed as "Unknown" in the
    display.

2.2    /BRIEF

    Produces a condensed display of the spinlock information
    displayed by default by the SHOW SPINLOCKS command, including
    the following: address, spinlock name or device name, IPL or
    device IPL, rank, ownership depth, and CPU ID of the owner
    CPU. If the system under analysis was executing with full-
    checking multiprocessing enabled (according to the setting of
    the MULTIPROCESSING or SYSTEM_CHECK system parameter), then the
    number of waiting CPUs and interlock status are also displayed.

2.3    /CACHED_PCB

    Displays all PCB-specific spinlocks associated with PCBs of
    deleted processes.

2.4    /COUNTS

    Produces a display of Spin, Wait, and Acquire counts for each
    spinlock (only if full-checking multiprocessing is enabled).

2.5    /DEVICE

    Displays information for all device spinlocks.

2.6    /DYNAMIC

    Displays information for all dynamic spinlocks in the system
    (device, port, mailbox, PCB, cached PCB, process-shared, and
    miscellaneous spinlocks).

2.7    /FULL

    Displays full descriptive and diagnostic information for each
    displayed spinlock.

2.8    /INDEX

       /INDEX=expression

    Displays the static spinlock whose index is specified in
    expression. You can only use the /INDEX qualifier to display a
    named static spinlock.

2.9    /MAILBOX

    Displays all mailbox-specific spinlocks.

2.10    /MISCELLANEOUS

    Display all spinlocks that are not included in existing groups
    such as mailbox and PCB spinlocks. Miscellaneous spinlocks
    include the XFC, PEDRIVER, TCP/IP, and various other spinlocks.
    The list of miscellaneous spinlocks varies from system to system.

2.11    /OWNED

    Displays information for all spinlocks owned by a CPU. If no
    processors own any spinlocks, SDA displays the following message:

    %SDA-I-NOSPLOWNED, all requested spinlocks are unowned

2.12    /PCB

    Displays all PCB-specific spinlocks.

2.13    /PORT

    Displays all port spinlocks.

2.14    /PSHARED

    Displays all process-shared (Pthreads) spinlocks.

2.15    /STATIC

    Displays information for all static spinlocks in the system.