PSTAT(8) COMMAND REFERENCE PSTAT(8) NAME pstat - print system facts SYNOPSIS /etc/pstat -fisTtx -p[a] [ -u ubase ] [ system ] [ corefile ] DESCRIPTION Pstat interprets the contents of certain system tables. If corefile is given, the tables are sought there, otherwise in /dev/kmem. Kernel symbols are taken from the cvt table (see cvt(4)) unless system is specified. If system is given, kernel symbols are obtained from the namelist in system. OPTIONS -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 CNT Number of processes that know this open file. INO The location of the inode table entry for this file. OFFS/SOCK The file offset (see lseek(2)), or the core address of the associated socket structure. -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 Printed 5/12/88 1
PSTAT(8) COMMAND REFERENCE PSTAT(8) 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 an exclusive 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. -p[a] Print process table for active processes with the following headings. If a is specified all processes, rather than just active ones, are described. LOC The core location of this table entry. S Run state encoded thus: 0 no process 1 waiting for some event 3 runnable Printed 5/12/88 2
PSTAT(8) COMMAND REFERENCE PSTAT(8) 4 being created 5 being terminated 6 stopped under trace F Miscellaneous state variables, or-ed together (hexadecimal): 000001 loaded 000002 the scheduler process 000004 locked for swap out 000008 swapped out 000010 traced 000020 used in tracing 000080 in page-wait 000100 prevented from swapping during fork(2) 000200 gathering pages for raw i/o 000400 exiting 001000 process resulted from a vfork(2) which is not yet complete 002000 another flag for vfork(2) 004000 process has no virtual memory, as it is a parent in the context of vfork(2) 008000 process is demand paging data pages from its text inode. 010000 process has advised of anomalous behavior with vadvise. 020000 process has advised of sequential behavior with vadvise. 040000 process is in a sleep which will timeout. 080000 a parent of this process has exited and this process is now considered detached. Printed 5/12/88 3
PSTAT(8) COMMAND REFERENCE PSTAT(8) 100000 process used 4.1BSD compatibility mode signal primitives, no system calls will restart. 200000 process is owed a profiling tick. POIP number of pages currently being pushed out from this process. PRI Scheduling priority, see setpriority(2). SIGNAL 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 (the opener of the controlling terminal). 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 Printed 5/12/88 4
PSTAT(8) COMMAND REFERENCE PSTAT(8) If text is pure, pointer to location of text table entry. CLKT Countdown for real interval timer, setitimer(2) measured in clock ticks (10 milliseconds). -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 Print the number of used and free slots in the several system tables. This option is useful for checking to see how full system tables have become if the system is under heavy load. -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 output queue. MODE See tty(4). ADDR Physical device address. DEL Number of delimiters (newlines) in canonicalized input queue. COL Calculated column position of terminal. STAT Miscellaneous state variables encoded thus: W waiting for open to complete O open S has special (output) start routine C carrier is on B busy doing output A process is awaiting output X open for exclusive use H hangup on close PGRP Process group for which this is controlling Printed 5/12/88 5
PSTAT(8) COMMAND REFERENCE PSTAT(8) terminal. DISC Line discipline; blank is old tty OTTYDISC or ``ntty'' for NTTYDISC or ``net'' for NETLDISC (see bk(4)). -uubase Print information about a user process; ubase 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. -x Print the text table with these headings: LOC The core location of this table entry. FLAGSMiscellaneous 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)) DADDRDisk address in swap, measured in multiples of 512 bytes. CADDRHead of a linked list of loaded processes using this text segment. 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. FILES /dev/cvt default source for kernel symbols /dev/kmem default source of tables Printed 5/12/88 6
PSTAT(8) COMMAND REFERENCE PSTAT(8) RETURN VALUE [NO_ERRS] Command completed without error. [USAGE] Incorrect command line syntax. Execution terminated. [NP_ERR] An error occurred that was not a system error. Execution terminated. CAVEATS 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. Things can change while pstat is running; the picture it gives is only a close approximation of reality. For instance, pstat may produce false error messages if it cannot find a particular file or if a data structure it is looking at changes underneath it. SEE ALSO ps(1), stat(2), cvt(4), and fs(5). Printed 5/12/88 7
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