PSTAT(8) System Manager's Manual PSTAT(8)
NAME
pstat - print system facts
SYNOPSIS
/usr/sbin/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 segment.
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 complete
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 succesfully 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
dynamically allocated.
4th Berkeley Distribution November 17, 1996 PSTAT(8)