PSTAT(8)                                                              PSTAT(8)


NAME
       pstat - print system facts

SYNOPSIS
       /etc/pstat -aixptufT [ suboptions ] [ system ] [ corefile ]

DESCRIPTION
       Pstat interprets the contents of certain system tables.  If corefile is
       given, the tables  are  sought  there,  otherwise  in  /dev/kmem.   The
       required  namelist  is  taken  from /vmunix unless system is specified.
       Options are

       -a    Under -p, describe all process  slots  rather  than  just  active
             ones.

       -i    Print the inode table with the these headings:

       LOC   The core location of this table entry.
       FLAGS Miscellaneous state variables encoded thus:
             L      locked
             U      update time (fs(5)) must be corrected
             A      access time must be corrected
             M      file system is mounted here
             W      wanted by another process (L flag is on)
             T      contains a text file
             C      changed time must be corrected
             S      shared lock applied
             E      exclusive lock applied
             Z      someone waiting for a lock
       CNT   Number of open file table entries for this inode.
       DEV   Major  and minor device number of file system in which this inode
             resides.
       RDC   Reference count of shared locks on the inode.
       WRC   Reference count of exclusive locks on the inode (this may be >  1
             if, for example, a file descriptor is inherited across a fork).
       INO   I-number within the device.
       MODE  Mode bits, see chmod(2).
       NLK   Number of links to this inode.
       UID   User ID of owner.
       SIZ/DEV
             Number of bytes in an ordinary file, or major and minor device of
             special file.

       -x    Print the text table with these headings:

       LOC   The core location of this table entry.
       FLAGS Miscellaneous state variables encoded thus:
             T      ptrace(2) in effect
             W      text not yet written on swap device
             L      loading in progress
             K      locked
             w      wanted (L flag is on)
             P      resulted  from  demand-page-from-inode  exec  format  (see
                    execve(2))

       DADDR Disk address in swap, measured in multiples of 512 bytes.

       CADDR Head  of  a  linked list of loaded processes using this text seg‐
             ment.

       RSS   Size of resident text, measured in multiples of 512 bytes.

       SIZE  Size of text segment, measured in multiples of 512 bytes.

       IPTR  Core location of corresponding inode.

       CNT   Number of processes using this text segment.

       CCNT  Number of processes in core using this text segment.

       FORW  Forward link in free list.

       BACK  Backward link in free list.

       -p    Print process table for active processes with these headings:

       LOC   The core location of this table entry.
       S     Run state encoded thus:
             0      no process
             1      waiting for some event
             3      runnable
             4      being created
             5      being terminated
             6      stopped (by signal or  under trace)
       F     Miscellaneous state variables, or’ed together (hexadecimal):
             0001     loaded
             0002     the scheduler process
             0004     locked for swap out
             0008     swapped out
             0010     traced
             0020     used in tracing
             0080     in page-wait
             0100     prevented from swapping during fork(2)
             0200     will restore old mask after taking signal
             0400     exiting
             0800     doing physical I/O (bio.c)
             1000     process resulted from a vfork(2) which is not  yet  com‐
                      plete
             2000     another flag for vfork(2)
             4000     process  has no virtual memory, as it is a parent in the
                      context of vfork(2)
             8000     process is demand paging data pages from its text inode.
             10000    process using sequential VM patterns
             20000    process using random VM patterns
             100000   using old 4.1-compatible signal semantics
             200000   process needs profiling tick
             400000   process is scanning descriptors during select
             1000000  process page tables have changed
       POIP  number of pages currently being pushed out from this process.
       PRI   Scheduling priority, see setpriority(2).
       SIG   Signals received (signals 1-32 coded in bits 0-31),
       UID   Real user ID.
       SLP   Amount of time process has been blocked.
       TIM   Time resident in seconds; times over 127 coded as 127.
       CPU   Weighted integral of CPU time, for scheduler.
       NI    Nice level, see setpriority(2).
       PGRP  Process number of root of process group.
       PID   The process ID number.
       PPID  The process ID of parent process.
       ADDR  If  in  core,  the page frame number of the first page of the ‘u-
             area’ of the process.  If swapped out, the position in  the  swap
             area measured in multiples of 512 bytes.
       RSS   Resident  set size - the number of physical page frames allocated
             to this process.
       SRSS  RSS at last swap (0 if never swapped).
       SIZE  Virtual size of process image (data+stack) in  multiples  of  512
             bytes.
       WCHAN Wait channel number of a waiting process.
       LINK  Link pointer in list of runnable processes.
       TEXTP If text is pure, pointer to location of text table entry.

       -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 putput 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)).

       -u    print information about a user process; the next argument is  its
             address  as  given by ps(1).  The process must be in main memory,
             or the file used can be a core image and the address 0.  Only the
             fields  located  in the first page cluster can be located succes‐
             fully if the process is in main memory.

       -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 inode table entry  or  socket  structure  for
             this file.
       OFFSET
             The file offset (see lseek(2)).

       -s  print  information  about swap space usage: the number of (1k byte)
       pages used and free is given as well as the number of used pages  which
       belong to text images.

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

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

SEE ALSO
       iostat(1), ps(1), systat(1), vmstat(1), stat(2), fs(5),
       K. Thompson, UNIX Implementation

BUGS
       It  would  be very useful if the system recorded “maximum occupancy” on
       the tables reported by -T; even more useful if these tables were dynam‐
       ically allocated.


4th Berkeley Distribution        May 24, 1986                         PSTAT(8)
 
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