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mpstat(1M)

Name | Synopsis | Description | Options | Examples | Attributes | See Also | Notes

Name

mpstat– report per-processor or per-processor-set statistics

Synopsis

/usr/bin/mpstat [-aq] [-p | -P set] [-T u | d] [interval [count]]

Description

The mpstat command reports processor statistics in tabular form. Each row of the table represents the activity of one processor. The first table summarizes all activity since boot. Each subsequent table summarizes activity for the preceding interval. All values are rates listed as events per second unless otherwise noted.

During execution of the kernel status command, the state of the kernel can change. If relevant, a state change message is included in the mpstat output, in one of the following forms:

<<processor 3 moved from pset: -1 to: 1>> <<pset destroyed: 1>> <<pset created: 1>> <<processors added: 1, 3>> <<processors removed: 1, 3>>

The mpstat command reports the following information:

CPU or SET

Without the -a option, mpstat reports CPU statistics for a processor ID. With the -a option, mpstat reports SET statistics for a processor set ID.

minf

minor faults

mjf

major faults

xcal

inter-processor cross-calls

intr

interrupts

ithr

interrupts as threads (not counting clock interrupt)

csw

context switches

icsw

involuntary context switches

migr

thread migrations (to another processor)

smtx

spins on mutexes (lock not acquired on first try)

srw

spins on readers/writer locks (lock not acquired on first try)

syscl

system calls

usr

percent user time

sys

percent system time

wt

the I/O wait time is no longer calculated as a percentage of CPU time, and this statistic will always return zero.

idl

percent idle time

sze

number of processors in the requested processor set

set

processor set membership of each CPU

Options

The following options are supported:

-a

Aggregate output by processor set. Sort the output by set. The default output is sorted by CPU number.

-p

Report processor set membership of each CPU. Sort the output by set. The default output is sorted by CPU number.

-P set

Display only those processors in the specified set.

-q

Suppress messages related to state changes.

-T 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).

interval

Report once each interval seconds.

count

Only print count reports.

Examples

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Example 1 Using mpstat to Generate User and System Operation Statistics




The following command generates processor statistics over a five–second interval in two reports. The command shows the processor set membership of each CPU. The default output is sorted by CPU number, aggregated by processor set, for user (usr) and system (sys) operations.

example% mpstat -ap 5 2 SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze 0 6 0 355 291 190 22 0 0 0 0 43 0 2 0 43 1 1 24 17 534 207 200 70 1 0 2 0 600 4 1 0 84 2 2 19 7 353 325 318 44 0 0 5 0 345 1 1 0 94 3 3 36 2 149 237 236 14 0 0 4 0 97 0 0 0 98 2 SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze 0 1 0 720 405 304 55 0 0 18 0 12 0 15 0 81 1 1 0 69 1955 230 200 313 33 4 41 9 7086 34 10 0 19 2 2 0 46 685 314 300 203 11 0 54 1 5287 36 6 0 28 3 3 0 0 14 386 384 0 0 0 0 0 0 0 0 0 100 2

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Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWcsu
Interface Stability	See below.

Invocation is evolving. Human readable output is unstable.

See Also

sar(1), date(1), iostat(1M), sar(1M), vmstat(1M), time(2), attributes(5)

Notes

The sum of CPU utilization might vary slightly from 100 due to rounding errors in the production of a percentage figure.

The total time used for CPU processing is the sum of usr and sys output values, reported for user and system operations. The idl value reports the time that the CPU is idle for any reason other than pending disk I/O operations.

Run the iostat command with the -x option to report I/O service times in svc_t output. The iostat utility also reports the same wt, user (us), and system (sy) statistics. See iostat(1M) for more information.

When executing in a zone and if the pools facility is active, mpstat(1M) will only provide information for those processors which are a member of the processor set of the pool to which the zone is bound.

Name | Synopsis | Description | Options | Examples | Attributes | See Also | Notes