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\"     from: @(#)pstat.8        8.5 (Berkeley) 5/13/94
\"
Dd December 11, 2019
Dt PSTAT 8
Os
Sh NAME
Nm pstat
Nd display system data structures
Sh SYNOPSIS
Nm
Oo
Fl T | Fl f | Fl s |
Fl t | Fl v
Oc
Op Fl ghkmn
Op Fl M Ar core
Op Fl N Ar system
Sh DESCRIPTION
Nm
displays open file entry, swap space utilization,
terminal state, and vnode data structures.
If
Ar corefile
is given, the information is sought there, otherwise
in
Pa /dev/kmem .
The required namelist is taken from
Pa /netbsd
unless
Ar system
is specified.
Pp
The following options are available:
Bl -tag -width Ds
It Fl T
Prints the number of used and free slots for open files, used vnodes, and swap
space.
This option is useful for checking to see how large system tables
become if the system is under heavy load.
It Fl f
Print the open file table with these headings:
Bl -tag -width indent
It LOC
The core location of this table entry.
It TYPE
The type of object the file table entry points to.
It FLG
Miscellaneous state variables encoded thus:
Pp
Bl -tag -width indent -compact
It R
open for reading
It W
open for writing
It A
open for appending
It S
shared lock present
It X
exclusive lock present
It I
signal pgrp when data ready
El
It CNT
Number of processes that know this open file.
It MSG
Number of messages outstanding for this file.
It DATA
The location of the vnode table entry or socket structure for this file.
It USE
Number of active users of this open file.
It IFLG
Value of internal flags.
It OFFSET
The file offset (see
Xr lseek 2 ) .
El
It Fl g
The
Fl g
option uses (1024 * 1024 * 1024) byte blocks instead of the default 512 byte.
It Fl h
Use
Xr humanize_number 3
to display (swap) sizes.
It Fl k
Use 1K-byte blocks.
It Fl m
The
Fl m
option uses (1024 * 1024) byte blocks instead of the default 512 byte.
It Fl n
Print devices by major/minor number rather than by name.
It Fl 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
Ar Used
column indicates the total blocks used so far;  the
Ar Available
column indicates how much space is remaining on each partition.
The
Ar Capacity
reports the percentage of space used.
Pp
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.
It Fl t
Print table for terminals
with these headings:
Bl -tag -width indent
It LINE
Physical device name.
It RAW
Number of characters in raw input queue.
It CAN
Number of characters in canonicalized input queue.
It OUT
Number of characters in output queue.
It HWT
High water mark for output.
It LWT
Low water mark for output.
It COL
Calculated column position of terminal.
It STATE
Miscellaneous state variables encoded thus:
Pp
Bl -tag -width indent -compact
It T
delay timeout in progress
\" .It W
\" waiting for open to complete
It O
open
It F
outq has been flushed during DMA
It C
carrier is on
It B
busy doing output
It A
process is awaiting output
It X
open for exclusive use
It S
output stopped
It K
further input blocked
It Y
tty in async I/O mode
It D
state for lowercase
Ql \e
work
It E
within a
Ql \e.../
for PRTRUB
It L
next character is literal
It P
retyping suspended input
Pq PENDIN
It N
counting tab width, ignore FLUSHO
It \&>
tty used for dialout
El
It SESS
Session for which this is controlling terminal.
It PGID
Current foreground process group associated with this terminal.
It DISC
Line discipline;
Ql term
for
TTYDISC (see
Xr termios 4 ) ,
Ql tab
for TABLDISC ,
\" (see
\".Xr tb 4 ) ,
Ql slip
for SLIPDISC (see
Xr sl 4 ) ,
Ql ppp
for PPPDISC (see
Xr ppp 4 ) ,
Ql strip
for STRIPDISC (see
Xr strip 4 ) ,
Ql hdlc
for HDLCDISC.
El
It Fl 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:
Pp
No *** MOUNT Em fstype from Li on Em on fsflags
Pp
where
Em fstype
is one of
Em adosfs , afs , cd9660 , fdesc ,
Em ffs , ext2fs , kernfs , lfs , lofs ,
Em mfs , msdos , nfs , null ,
Em procfs , umap , union ;
Em from
is the filesystem mounted from;
Em on
is the directory
the filesystem is mounted on; and
Em fsflags
is a list
of optional flags applied to the mount (see
Xr 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 specific.
The headers common to all vnodes are:
Bl -tag -width indent
It ADDR
Location of this vnode.
It TYP
File type.
It VFLAG
A list of letters representing vnode flags:
Pp
Bl -tag -width indent -compact
It R
VV_ROOT root of its file system.
It T
VI_TEXT pure text prototype.
It S
VV_SYSTEM vnode being used by kernel.
It I
VV_ISTTY vnode is a tty.
It E
VI_EXECMAP vnode has PROT_EXEC mappings.
It D
VU_DIROP lfs vnode involved in directory op.
It O
VI_ONWORKLST vnode is on syncer work-list.
It M
VV_MPSAFE file system is multithreaded
El
It USE
The number of references to this vnode.
It HOLD
The number of I/O buffers held by this vnode.
It TAG
The type of underlying data.
It NPAGE
The number of pages in this vnode.
It FILEID
The vnode fileid.
In the case of
Em ffs
or
Em ext2fs
this is the inode number.
It IFLAG
Miscellaneous filesystem specific state variables encoded thus:
Bl -tag -width indent
It "For ffs, lfs or ext2fs:"
Bl -tag -width indent -compact
It A
access time must be corrected
It C
changed time must be corrected
It U
update time
Pq Xr fs 5
must be corrected
It M
contains modifications
It a
has been accessed
It R
has a rename in progress
It S
shared lock applied
It E
exclusive lock applied
It c
is being cleaned (LFS)
It D
directory operation in progress (LFS)
It s
blocks to be freed in free count
El
It "For nfs:"
Bl -tag -width indent -compact
It W
waiting for I/O buffer flush to complete
It P
I/O buffers being flushed
It M
locally modified data exists
It E
an earlier write failed
It A
special file accessed
It U
special file updated
It C
special file times changed
El
El
It SIZ/RDEV
Number of bytes in an ordinary file, or
major and minor device of special file.
El
El
Sh ENVIRONMENT
Bl -tag -width BLOCKSIZE
It Ev BLOCKSIZE
If the environment variable
Ev BLOCKSIZE
is set, and the
Fl k
option is not specified, the block counts will be displayed in units of that
size block.
El
Sh FILES
Bl -tag -width /dev/kmemxxx -compact
It Pa /netbsd
namelist
It Pa /dev/kmem
default source of tables
El
Sh SEE ALSO
Xr ps 1 ,
Xr systat 1 ,
Xr vmstat 1 ,
Xr stat 2 ,
Xr fs 5 ,
Xr iostat 8
Rs
%T Tn UNIX Implementation
%A K. Thompson
Re
Sh HISTORY
The
Nm
command appeared in
Bx 4.0 .
Sh BUGS
Swap statistics are reported for all swap partitions compiled into the kernel,
regardless of whether those partitions are being used.
Pp
Does not understand NFS swap servers.

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