PCP-IPCS(1)                General Commands Manual               PCP-IPCS(1)

NAME         top

       pcp-ipcs - provide information on IPC facilities

SYNOPSIS         top

       pcp-ipcs [resource-option] [output-format]
       pcp-ipcs [resource-option] -i id

DESCRIPTION         top

       pcp-ipcs provides information on the inter-process communication
       facilities for which the calling process has read access.

OPTIONS         top

       -i, --id id
              Print details only on the resource identified by id.

       -h, --help
              Display a help text and exit.

       -V, --version
              Display version information and exit.

   Resource options
       -q, --queues
              Write information about active message queues.

       -m, --shmems
              Write information about active shared memory segments.

       -s, --semaphores
              Write information about active semaphore sets.

       -a, --all
              Write information about all three resources (default).

   Output formats
       Of these options only one takes effect: the last one specified.

       -c, --creator
              Show creator and owner.

       -l, --limits
              Show resource limits.

       -p, --pid
              Show PIDs of creator and last operator.

       -t, --time
              Write time information.  The time of the last control
              operation that changed the access permissions for all
              facilities, the time of the last msgsnd() and msgrcv()
              operations on message queues, the time of the last shmat() and
              shmdt() operations on shared memory, and the time of the last
              semop() operation on semaphores.

       -u, --summary
              Show status summary.

       These affect only the -l (--limits) option.

       -b, --bytes
              Print sizes in bytes.

              Print sizes in human-readable format.

SEE ALSO         top

       ipcrm(1), ipcmk(1), msgrcv(2), msgsnd(2), semget(2), semop(2),
       shmat(2), shmdt(2), shmget(2)

CONFORMING TO         top

       The Linux pcp-ipcs utility is not fully compatible to the POSIX pcp-
       ipcs utility.  The Linux version does not support the POSIX -a, -b
       and -o options, but does support the -l and -u options not defined by
       POSIX.  A portable application shall not use the -a, -b, -o, -l, and
       -u options.

COLOPHON         top

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at ⟨⟩.
       If you have a bug report for this manual page, send it to  This page was obtained from the project's upstream
       Git repository ⟨⟩ on
       2019-05-09.  (At that time, the date of the most recent commit that
       was found in the repository was 2019-05-08.)  If you discover any
       rendering problems in this HTML version of the page, or you believe
       there is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

Performance Co-Pilot                 PCP                         PCP-IPCS(1)