MirOS Manual: pstat(8)

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

NAME

     pstat - display system data structures

SYNOPSIS

     pstat [-fknsTtv] [-M core] [-N system]

DESCRIPTION

     pstat displays open file entry, swap space utilization, terminal state,
     and vnode data structure information. If corefile is given, the informa-
     tion is sought there, otherwise in the running kernel via /dev/kmem. The
     required namelist is taken from the running kernel unless system is
     specified.

     The options are as follows:

     -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
                     L       exclusive or shared 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)).

     -k      Use 1K-byte blocks.

     -M core
             Extract values associated with the name list from the specified
             core instead of the running kernel.

     -N system
             Extract the name list from the specified system instead of the
             running kernel.

     -n      Print devices by major/minor number rather than by name.

     -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 remaining
             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      Prints the number of used and free slots for open files, used
             vnodes, and swap space. It is useful for checking to see how
             large system tables become if the system is under heavy load.

     -t      Print table for terminals with these headings:

             LINE    Physical device name.

             RAW     Number of characters in raw input queue.

             CAN     Number of characters in canonicalized input queue.

             OUT     Number of characters in output queue.

             HWT     High water mark for output.

             LWT     Low water mark for output.

             COL     Calculated column position of terminal.

             STATE   Miscellaneous state variables encoded thus:

                     W       waiting for open to complete
                     O       open
                     C       carrier is on
                     T       delay timeout in progress
                     F       outq has been flushed during DMA
                     B       busy doing output
                     A       process is awaiting output
                     X       open for exclusive use
                     S       output stopped
                     K       further input blocked
                     Y       tty in async I/O mode
                     D       next character is escaped lowercase special
                     E       printing erase sequence
                     L       next character is literal
                     P       retyping suspended input
                     N       counting tab width, ignoring output flush

             SESS    Enclosing session.

             PGID    Process group for which this is controlling terminal.

             DISC    Line discipline; 'term' for TTYDISC (see termios(4)),
                     'tab' for TABLDISC (see tb(4)), 'slip' for SLIPDISC (see
                     sl(4)), 'ppp' for PPPDISC (see ppp(4)), 'strip' for
                     STRIPDISC (see strip(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 the file systems supported by the kernel;
             from is the partition the filesystem 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 second
             line is a header for the individual fields, the first part of
             which are fixed, and the second part are filesystem type specif-
             ic. 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 root of its file system.
                     T       VTEXT pure text prototype.
                     S       VSYSTEM vnode being used by kernel.
                     I       VISTTY vnode represents a tty.
                     L       VXLOCK locked to change underlying type.
                     W       VXWANT process is waiting for vnode.
                     B       VBWAIT waiting for output to complete.
                     A       VALIASED vnode has an alias.
                     D       VDIROP lfs vnode involved in directory op.
                     F       VONFREELIST vnode is on a free list.
                     l       VLOCKSWORK FS supports locking discipline.
                     s       VONSYNCLIST vnode is on syncer worklist.

             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 ffs this is the inode
                     number.

             IFLAG   Miscellaneous filesystem specific state variables encoded
                     thus:

                     For ffs:
                             A       access time must be corrected
                             C       changed time must be corrected
                             U       update time (fs(5)) must be corrected
                             R       has a rename in progress
                             M       contains modifications
                             S       shared lock applied
                             E       exclusive lock applied

                     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)
                             A       special file accessed
                             U       special file updated
                             C       special file times changed

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

ENVIRONMENT

     BLOCKSIZE  If the environment variable BLOCKSIZE is set, and the -k op-
                tion is not specified, the block counts will be displayed in
                units of that size block.

SEE ALSO

     fstat(1), procmap(1), ps(1), systat(1), stat(2), fs(5), iostat(8),
     vmstat(8)

     K. Thompson, UNIX Implementation.

HISTORY

     The pstat command appeared in 4.0BSD.

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.

MirOS BSD #10-current           April 19, 1994                               2

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