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SunOS man pages : prstat (1)

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. SunOS 5.8 Last change: 7 Aug 2000 1 Maintenance Commands prstat(1M) -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. SunOS 5.8 Last change: 7 Aug 2000 2 Maintenance Commands prstat(1M) -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. SunOS 5.8 Last change: 7 Aug 2000 3 Maintenance Commands prstat(1M) 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 SunOS 5.8 Last change: 7 Aug 2000 4 Maintenance Commands prstat(1M) 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 superuser processes The following command reports the five most active superuser 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 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 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 SunOS 5.8 Last change: 7 Aug 2000 5 Maintenance Commands prstat(1M) 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), project(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: 7 Aug 2000 6