NAME

pstat − print system facts

SYNOPSIS

pstat [ −aixptuf ] [ suboptions ] [ file ]

DESCRIPTION

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

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

−i Print the inode table with the these headings:

LOCThe core location of this table entry. 

FLAGSMiscellaneous state variables encoded thus:

Llocked

Uupdate time filsys(5)) must be corrected

Aaccess time must be corrected

Mfile system is mounted here

Wwanted by another process (L flag is on)

Tcontains a text file

Cchanged time must be corrected

CNTNumber of open file table entries for this inode. 

DEVMajor and minor device number of file system in which this inode resides. 

INOI-number within the device. 

MODEMode bits, see chmod(2).

NLKNumber of links to this inode. 

UIDUser ID of owner. 

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

−x Print the text table with these headings:

LOCThe core location of this table entry. 

FLAGSMiscellaneous state variables encoded thus:

Tptrace(2) in effect

Wtext not yet written on swap device

Lloading in progress

Klocked

wwanted (L flag is on)

Presulted from demand-page-from-inode exec format (see exec(2))

DADDRDisk address in swap, measured in multiples of 512 bytes. 

CADDRHead of a linked list of loaded processes using this text segment. 

SIZESize of text segment, measured in multiples of 512 bytes. 

IPTRCore location of corresponding inode. 

CNTNumber of processes using this text segment. 

CCNTNumber of processes in core using this text segment. 

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

LOCThe core location of this table entry. 

SRun state encoded thus:

0no process

1waiting for some event

3runnable

4being created

5being terminated

6stopped under trace

FMiscellaneous state variables, or-ed together (hexadecimal):

0001loaded

0002the scheduler process

0004locked for swap out

0008swapped out

0010traced

0020used in tracing

0040locked in by lock(2).

0080in page-wait

0100prevented from swapping during fork(2)

0200gathering pages for raw i/o

0400exiting

1000process resulted from a vfork(2) which is not yet complete

2000another flag for vfork(2)

4000process has no virtual memory, as it is a parent in the context of vfork(2)

8000process is demand paging data pages from its text inode. 

POIPnumber of pages currently being pushed out from this process. 

PRIScheduling priority, see nice(2).

SIGNALSignals received (signals 1-16 coded in bits 0-15),

UIDReal user ID. 

SLPAmount of time process has been blocked. 

TIMTime resident in seconds; times over 127 coded as 127. 

CPUWeighted integral of CPU time, for scheduler. 

NINice level, see nice(2).

PGRPProcess number of root of process group (the opener of the controlling terminal). 

PIDThe process ID number. 

PPIDThe process ID of parent process. 

ADDRIf 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. 

RSSResident set size − the number of physical page frames allocated to this process. 

SRSSRSS at last swap (0 if never swapped). 

SIZEVirtual size of process image (data+stack) in multiples of 512 bytes. 

WCHANWait channel number of a waiting process. 

LINKLink pointer in list of runnable processes. 

TEXTPIf text is pure, pointer to location of text table entry. 

CLKTCountdown for alarm(2) measured in seconds.

−t Print table for terminals with these headings:

RAWNumber of characters in raw input queue. 

CANNumber of characters in canonicalized input queue. 

OUTNumber of characters in putput queue. 

MODESee tty(4).

ADDRPhysical device address. 

DELNumber of delimiters (newlines) in canonicalized input queue. 

COLCalculated column position of terminal. 

STATEMiscellaneous state variables encoded thus:

Wwaiting for open to complete

Oopen

Shas special (output) start routine

Ccarrier is on

Bbusy doing output

Aprocess is awaiting output

Xopen for exclusive use

Hhangup on close

PGRPProcess group for which this is controlling terminal. 

−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.

−f Print the open file table with these headings:

LOCThe core location of this table entry. 

FLGMiscellaneous state variables encoded thus:

Ropen for reading

Wopen for writing

Ppipe

CNTNumber of processes that know this open file. 

INOThe location of the inode table entry for this file. 

OFFSThe file offset, see lseek(2).

FILES

/vmunixnamelist
/dev/kmemdefault source of tables

SEE ALSO

ps(1), stat(2), filsys(5)
K. Thompson, UNIX Implementation
O. Babaoglu and W. Joy Data Structures added in the Berkeley Virtual Memory Extensions to the UNIX System

3rd Berkeley Distribution