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PSTAT(8)                  BSD System Manager's Manual                 PSTAT(8)

NAME
     pstat -- display system data structures

SYNOPSIS
     pstat [-Tfnstv] [-M core] [-N system]

DESCRIPTION
     Pstat displays open file entry, swap space utilization, terminal state,
     and vnode data structures.  If corefile is given, the information is
     sought there, otherwise in /dev/kmem.  The required namelist is taken
     from /vmunix unless system is specified.  The -n option specifies that
     devices should be printed out by major/minor number rather than by name.

     Options are

     -T      Prints the number of used and free slots in the several system
             tables and is useful for checking to see how large system tables
             have become if the system is under heavy load.

     -f      Print the open file table with these headings:

             LOC     The core location of this table entry.

             TYPE    The type of object the file table entry points to.

             FLG     Miscellaneous state variables encoded thus:

                     R       open for reading

                     W       open for writing

                     A       open for appending

                     S       shared lock present

                     X       exclusive lock present

                     I       signal pgrp when data ready

             CNT     Number of processes that know this open file.

             MSG     Number of messages outstanding for this file.

             DATA    The location of the vnode table entry or socket structure
                     for this file.

             OFFSET  The file offset (see lseek(2)).

     -s      Print information about swap space usage on all the swap areas
             compiled into the kernel.  The first column is the device name of
             the partition.  The next column is the total space available in
             the partition.  The Used column indicates the total blocks used
             so far;  the Available column indicates how much space is remain-
             ing on each partition.  The Capacity reports the percentage of
             space used.

             If more than one partition is configured into the system, totals
             for all of the statistics will be reported in the final line of
             the report.

     -t      Print table for terminals with these headings:

             RAW     Number of characters in raw input queue.

             CAN     Number of characters in canonicalized input queue.

             OUT     Number of characters in output queue.

             MODE    See tty(4).

             ADDR    Physical device address.

             DEL     Number of delimiters (newlines) in canonicalized input
                     queue.

             COL     Calculated column position of terminal.

             STATE   Miscellaneous state variables encoded thus:

                     T       delay timeout in progress

                     W       waiting for open to complete

                     O       open

                     F       outq has been flushed during DMA

                     C       carrier is on

                     B       busy doing output

                     A       process is awaiting output

                     X       open for exclusive use

                     S       output stopped

                     H       hangup on close

             PGRP    Process group for which this is controlling terminal.

             DISC    Line discipline; blank is old tty OTTYDISC or 'new tty'
                     for NTTYDISC or 'net' for NETLDISC (see bk(4)).

     -v      Print the active vnodes.  Each group of vnodes corresponding to a
             particular filesystem is preceded by a two line header.  The
             first line consists of the following:

             *** MOUNT fstype from on on fsflags

             where fstype is one of ufs, nfs, mfs, or pc; from is the filesys-
             tem is mounted from; on is the directory the filesystem is
             mounted on; and fsflags is a list of optional flags applied to
             the mount (see mount(8)).  the first part of which are fixed, and
             the second part are filesystem type specific.  The headers common
             to all vnodes are:

             ADDR    Location of this vnode.

             TYP     File type.

             VFLAG

                     A list of letters representing vnode flags:

                     R       - VROOT

                     T       - VTEXT

                     L       - VXLOCK

                     W       - VXWANT

                     E       - VEXLOCK

                     S       - VSHLOCK

                     T       - VLWAIT

                     A       - VALIASED

                     B       - VBWAIT

             USE     The number of references to this vnode.

             HOLD    The number of I/O buffers held by this vnode.

             FILEID  The vnode fileid.  In the case of ufs this is the inode
                     number.

             IFLAG   Miscellaneous filesystem specific state variables encoded
                     thus:

                     For ufs:

                             L       locked

                             U       update time (fs(5)) must be corrected

                             A       access time must be corrected

                             W       wanted by another process (L flag is on)

                             C       changed time must be corrected

                             S       shared lock applied

                             E       exclusive lock applied

                             Z       someone waiting for a lock

                             M       contains modifications

                             R       has a rename in progress

                     For nfs:

                             W       waiting for I/O buffer flush to complete

                             P       I/O buffers being flushed

                             M       locally modified data exists

                             E       an earlier write failed

                             X       non-cacheable lease (nqnfs)

                             O       write lease (nqnfs)

                             G       lease was evicted (nqnfs)

             SIZ/RDEV
                     Number of bytes in an ordinary file, or major and minor
                     device of special file.

FILES
     /vmunix       namelist
     /dev/kmem     default source of tables

SEE ALSO
     iostat(1), ps(1), systat(1), vmstat(1), stat(2), fs(5),

BUGS
     Swap statistics are reported for all swap partitions compiled into the
     kernel, regardless of whether those partitions are being used.

     Does not understand NFS swap servers.

HISTORY
     The pstat command appeared in 4.0BSD.

4th Berkeley Distribution        May 13, 1994        4th Berkeley Distribution