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Maintenance Commands prstat(1M)
NAME
prstat - report active process statistics
SYNOPSIS
prstat [ -acJLmRtTv ] [ -C psrsetlist ] [ -j projlist ] [
-k tasklist ] [ -n ntop[,nbottom] ] [ -p pidlist ] [ -P
cpulist ] [ -s key | -S key ] [ -u euidlist ] [ -U
uidlist ] [ 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 exam-
ine only processes matching specified PIDs, UIDs, CPU IDs,
and processor set IDs.
The -j, -k, -C, -p, -P, -u, and -U 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.
-C psrsetlist
Report only processes or lwps that are bound to pro-
cessor sets in the given list. Each processor set is
identified by an integer as reported by psrset(1M).
-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(4).
-J Report information about processes and projects. In
this mode prstat displays separate reports about
processes and projects at the same time.
-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. In
addition to all fields listed in -v mode, this mode
also includes 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, or projects statistics are
reported if the -a, -t, -T, or -J options are speci-
fied. By default, prstat can display as many lines of
output as will fit within a window or terminal.
-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 iden-
tified by an integer as reported by psrinfo(1M).
-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.
-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.
time Sort by process execution time.
size Sort by size of process image.
rss Sort by resident set size.
pri Sort by process priority.
-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 Report verbose process usage. 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 con-
text switches, system calls and the number of signals
received.
OUTPUT
The following list defines the column headings and the mean-
ings of a prstat report:
PID The process ID of the process.
USERNAME
The real user (login) name or real user ID.
SIZE The total virtual memory size of the process, includ-
ing all mapped files and devices, in kilobytes (K),
megabytes (M), or gigabytes (G). The resident set size
of the process (RSS), in kilobytes (K), megabytes (M),
or gigabytes (G).
STATE The state of the process:
cpuN Process is running on CPU N.
sleep Sleeping: process is witing for an event to com-
plete.
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.
PROCESS
The name of the process (name of executed file).
LWPID The lwp ID of the lwp being reported.
NLWP The number of lwps in the process.
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 pro-
cessing system traps.
TFL The percentage of time the process has spent process-
ing text page faults.
DFL The percentage of time the process has spent process-
ing 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 in
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.
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 SIZE RSS STATE PRI NICE TIME CPU PROCESS/LWP
42 root 1280K 856K sleep 55 0 0:00.00 0.2%
devfseventd/7
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 infor-
mation 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.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
_________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|______________________|_________________________|
| Availability | SUNWcsu |
|______________________|_________________________|
SEE ALSO
proc(1), psrinfo(1M), psrset(1M), sar(1M), proc(4), pro-
ject(4), attributes(5)
NOTES
The snap-shot 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 pro-
cess; the original state is restored when prstat exits. See
proc(4) for additional information about the microstate
accounting facility.
SunOS 5.8 Last change: 17 Feb 2000 6
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