pstat(8) - NetBSD Manual Pages

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


NAME

     pstat - display system data structures


SYNOPSIS

     pstat [-T | -f | -s | -t | -v] [-kn] [-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 /netbsd unless system is specified.

     The following options are available:

     -T      Prints the number of used and free slots for open files, used vn-
             odes, and swap space. It is useful for checking to see how large
             system tables 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)).

     -k      Use 1K-byte blocks.

     -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 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:

             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:

                     T       delay timeout in progress
                     W       waiting for open to complete
                     O       open
                     F       outq has been flushed during DMA
                     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

             SESS    Session for which this is controlling terminal.

             PGID    Current foreground process group associated with this
                     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 adosfs, afs, cd9660, fdesc, ffs, ext2fs,
             kernfs, lfs, lofs ffs0 mfs, msdos, nfs, null, portal, procfs,
             umap, union; from is the filesystem mounted from; on is the di-
             rectory 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.
                     L       VXLOCK locked to change underlying type.
                     W       VXWANT process is waiting for vnode.
                     S       VSYSTEM vnode being used by kernel.
                     A       VALIASED vnode has an alias
                     B       VBWAIT waiting for output to complete
                     D       VDIROP lfs vnode involved in directory op.

             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 or ext2fs this is
                     the inode number.

             IFLAG   Miscellaneous filesystem specific state variables encoded
                     thus:

                     For ffs or ext2fs:
                             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.


ENVIRONMENT VARIABLES

     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.


FILES

     /netbsd       namelist
     /dev/kmem     default source of tables


SEE ALSO

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


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.

NetBSD 1.4                       May 13, 1994                                3