PRSTAT(8) Maintenance Commands and Procedures PRSTAT(8)

NAME

prstat - report active process statistics

SYNOPSIS

prstat [-acHJLmRrtTvWZ] [-d u | d] [-C psrsetlist] [-h lgrplist]
[-j projlist] [-k tasklist] [-n ntop[,nbottom]]
[-p pidlist] [-P cpulist] [-s key | -S key ]
[-u euidlist] [-U uidlist] [-z zoneidlist]
[interval [count]]

DESCRIPTION

The prstat utility iteratively examines all active processes on the
system and reports statistics based on the selected output mode and
sort order. prstat provides options to examine only processes
matching specified PIDs, UIDs, zone IDs, CPU IDs, and processor set
IDs.


The -j, -k, -C, -p, -P, -u, -U, and -z options accept lists as
arguments. Items in a list can be either separated by commas or
enclosed in quotes and separated by commas or spaces.


If you do not specify an option, prstat examines all processes and
reports statistics sorted by CPU usage.

OPTIONS

The following options are supported:

-a

Report information about processes and users. In this mode prstat
displays separate reports about processes and users at the same
time.


-c

Print new reports below previous reports instead of overprinting
them. Long names are not truncated in this mode.


-C psrsetlist

Report only processes or lwps that are bound to processor sets in
the given list. Each processor set is identified by an integer as
reported by psrset(8). The load averages displayed are the sum of
the load averages of the specified processor sets (see
pset_getloadavg(3C)). Processes with one or more LWPs bound to
processor sets in the given list are reported even when the -L
option is not used.


-d u | d

Specify u for a printed representation of the internal
representation of time. See time(2). Specify d for standard date
format. See date(1).


-h lgrplist

Report only processes or lwps whose home lgroup is in the given
list of lgroups. No processes or lwps will be listed for invalid
lgroups.


-H

Report information about home lgroup. In this mode, prstat adds
an extra column showing process or lwps home lgroup with the
header LGRP.


-j projlist

Report only processes or lwps whose project ID is in the given
list. Each project ID can be specified as either a project name
or a numerical project ID. See project(5).


-J

Report information about processes and projects. In this mode
prstat displays separate reports about processes and projects at
the same time. A trailing asterisk marks a long name that has
been truncated to fit the column.


-k tasklist

Report only processes or lwps whose task ID is in tasklist.


-L

Report statistics for each light-weight process (LWP). By
default, prstat reports only the number of LWPs for each process.


-m

Report microstate process accounting information. This output
format includes the percentage of time the process has spent in
user mode, in system mode, and sleeping. It also includes the
number of voluntary and involuntary context switches, system
calls, the number of signals received, and the percentage of time
the process has spent processing system traps, text page faults,
data page faults, waiting for user locks and waiting for CPU
(latency time).


-n ntop[,nbottom]

Restrict number of output lines. The ntop argument determines how
many lines of process or lwp statistics are reported, and the
nbottom argument determines how many lines of user, task, project
or zone statistics are reported if the -a, -t, -T, -J or -Z
options are specified. By default, prstat displays as many lines
of output that fit in a window or terminal. When you specify the
-c option or direct the output to a file, the default values for
ntop and nbottom are 15 and 5.


-p pidlist

Report only processes whose process ID is in the given list.


-P cpulist

Report only processes or lwps which have most recently executed
on a CPU in the given list. Each CPU is identified by an integer
as reported by psrinfo(8).


-R

Put prstat in the real time scheduling class. When this option is
used, prstat is given priority over time-sharing and interactive
processes. This option is available only for superuser.


-r

Disable lookups for user names and project names. (Note that this
does not apply to lookups for the -j, -u, or -U options.)


-s key

Sort output lines (that is, processes, lwps, or users) by key in
descending order. Only one key can be used as an argument.

There are five possible key values:

cpu

Sort by process CPU usage. This is the default.


pri

Sort by process priority.


rss

Sort by resident set size.


size

Sort by size of process image.


time

Sort by process execution time.


-S key

Sort output lines by key in ascending order. Possible key values
are the same as for the -s option. See -s.


-t

Report total usage summary for each user. The summary includes
the total number of processes or LWPs owned by the user, total
size of process images, total resident set size, total cpu time,
and percentages of recent cpu time and system memory.


-T

Report information about processes and tasks. In this mode prstat
displays separate reports about processes and tasks at the same
time.


-u euidlist

Report only processes whose effective user ID is in the given
list. Each user ID may be specified as either a login name or a
numerical user ID.


-U uidlist

Report only processes whose real user ID is in the given list.
Each user ID may be specified as either a login name or a
numerical user ID.


-v

Same as -m, for backwards compatibility.


-W

Truncate long names even when prstat would normally print them in
full. A trailing asterisk marks a long name that has been
truncated to fit the column.


-z zoneidlist

Report only processes or LWPs whose zone ID is in the given list.
Each zone ID can be specified as either a zone name or a
numerical zone ID. See zones(7).


-Z

Report information about processes and zones. In this mode,
prstat displays separate reports about processes and zones at the
same time. A trailing asterisk marks a long name that has been
truncated to fit the column.

OUTPUT

The following list defines the column headings and the meanings of a
prstat report:

PID

The process ID of the process.


USERNAME

The real user (login) name or real user ID. A trailing asterisk
marks a long name that has been truncated to fit the column.


SWAP

The total virtual memory size of the process, including all
mapped files and devices, in kilobytes (K), megabytes (M), or
gigabytes (G).


RSS

The resident set size of the process (RSS), in kilobytes (K),
megabytes (M), or gigabytes (G). The RSS value is an estimate
provided by proc(5) that might underestimate the actual resident
set size. Users who want to get more accurate usage information
for capacity planning should use the -x option to pmap(1)
instead.


STATE

The state of the process:

cpuN

Process is running on CPU N.


sleep

Sleeping: process is waiting for an event to complete.


wait

Waiting: process is waiting for CPU usage to drop to the CPU-
caps enforced limits. See the description of CPU-caps in
resource_controls(7).


run

Runnable: process in on run queue.


zombie

Zombie state: process terminated and parent not waiting.


stop

Process is stopped.


PRI

The priority of the process. Larger numbers mean higher priority.


NICE

Nice value used in priority computation. Only processes in
certain scheduling classes have a nice value.


TIME

The cumulative execution time for the process.


CPU

The percentage of recent CPU time used by the process. If
executing in a non-global zone and the pools facility is active,
the percentage will be that of the processors in the processor
set in use by the pool to which the zone is bound.


PROCESS

The name of the process (name of executed file).


LWP

The lwp ID of the lwp being reported, as well as the LWP name if
any is set.


NLWP

The number of lwps in the process.


With the some options, in addition to a number of the column headings
shown above, there are:

NPROC

Number of processes in a specified collection.


MEMORY

Percentage of memory used by a specified collection of processes.


The following columns are displayed when the -v or -m option is
specified

USR

The percentage of time the process has spent in user mode.


SYS

The percentage of time the process has spent in system mode.


TRP

The percentage of time the process has spent in processing system
traps.


TFL

The percentage of time the process has spent processing text page
faults.


DFL

The percentage of time the process has spent processing data page
faults.


LCK

The percentage of time the process has spent waiting for user
locks.


SLP

The percentage of time the process has spent sleeping.


LAT

The percentage of time the process has spent waiting for CPU.


VCX

The number of voluntary context switches.


ICX

The number of involuntary context switches.


SCL

The number of system calls.


SIG

The number of signals received.


Under the -L option, one line is printed for each lwp in the process
and some reporting fields show the values for the lwp, not the
process.


The following column is displayed when the -H option is specified:

LGRP

The home lgroup of the process or lwp.

OPERANDS

The following operands are supported:

count

Specifies the number of times that the statistics are repeated.
By default, prstat reports statistics until a termination signal
is received.


interval

Specifies the sampling interval in seconds; the default interval
is 5 seconds.

EXAMPLES

Example 1: Reporting the Five Most Active Super-User Processes

The following command reports the five most active super-user
processes running on CPU1 and CPU2:


example% prstat -u root -n 5 -P 1,2 1 1

PID USERNAME SWAP RSS STATE PRI NICE TIME CPU PROCESS/LWP
306 root 3024K 1448K sleep 58 0 0:00.00 0.3% sendmail/1
102 root 1600K 592K sleep 59 0 0:00.00 0.1% in.rdisc/1
250 root 1000K 552K sleep 58 0 0:00.00 0.0% utmpd/1
288 root 1720K 1032K sleep 58 0 0:00.00 0.0% sac/1
1 root 744K 168K sleep 58 0 0:00.00 0.0% init/1
TOTAL: 25, load averages: 0.05, 0.08, 0.12

Example 2: Displaying Verbose Process Usage Information

The following command displays verbose process usage information
about processes with lowest resident set sizes owned by users root
and john.


example% prstat -S rss -n 5 -vc -u root,john

PID USERNAME USR SYS TRP TFL DFL LCK SLP LAT VCX ICX SCL SIG PROCESS/LWP
1 root 0.0 0.0 - - - - 100 - 0 0 0 0 init/1
102 root 0.0 0.0 - - - - 100 - 0 0 3 0 in.rdisc/1
250 root 0.0 0.0 - - - - 100 - 0 0 0 0 utmpd/1
1185 john 0.0 0.0 - - - - 100 - 0 0 0 0 csh/1
240 root 0.0 0.0 - - - - 100 - 0 0 0 0 powerd/4
TOTAL: 71, load averages: 0.02, 0.04, 0.08

EXIT STATUS

The following exit values are returned:

0

Successful completion.


1

An error occurred.

SEE ALSO

date(1), lgrpinfo(1), plgrp(1), proc(1), ps(1), time(2),
pset_getloadavg(3C), proc(5), project(5), attributes(7),
resource_controls(7), zones(7), psrinfo(8), psrset(8), sar(8)

NOTES

The snapshot of system usage displayed by prstat is true only for a
split-second, and it may not be accurate by the time it is displayed.
When the -m option is specified, prstat tries to turn on microstate
accounting for each process; the original state is restored when
prstat exits. See proc(5) for additional information about the
microstate accounting facility.


The total memory size reported in the SWAP and RSS columns for groups
of processes can sometimes overestimate the actual amount of memory
used by processes with shared memory segments.

June 6, 2019 PRSTAT(8)