NAME¶

mpstat - Report processors related statistics.

SYNOPSIS¶

mpstat [ -A ] [ -u ] [ -V ] [ -I { SUM | CPU | SCPU | ALL } ] [ -P { cpu [,...] | ON | ALL } ] [ interval [ count ] ]

DESCRIPTION¶

The mpstat command writes to standard output activities for each available processor, processor 0 being the first one. Global average activities among all processors are also reported. The mpstat command can be used both on SMP and UP machines, but in the latter, only global average activities will be printed. If no activity has been selected, then the default report is the CPU utilization report.

The interval parameter specifies the amount of time in seconds between each report. A value of 0 (or no parameters at all) indicates that processors statistics are to be reported for the time since system startup (boot). The count parameter can be specified in conjunction with the interval parameter if this one is not set to zero. The value of count determines the number of reports generated at interval seconds apart. If the interval parameter is specified without the count parameter, the mpstat command generates reports continuously.

OPTIONS¶

-A

This option is equivalent to specifying -u -I ALL -P ALL

-I { SUM | CPU | SCPU | ALL }

Report interrupts statistics.

With the SUM keyword, the mpstat command reports the total number of interrupts per processor. The following values are displayed:

CPU

-P { cpu [,...] | ON | ALL }

Indicate the processor number for which statistics are to be reported. cpu is the processor number. Note that processor 0 is the first processor. The ON keyword indicates that statistics are to be reported for every online processor, whereas the ALL keyword indicates that statistics are to be reported for all processors.

-u

Report CPU utilization. The following values are displayed:

CPU

-V

Print version number then exit.

ENVIRONMENT¶

The mpstat command takes into account the following environment variable:

S_TIME_FORMAT

If this variable exists and its value is ISO then the current locale will be ignored when printing the date in the report header. The mpstat command will use the ISO 8601 format (YYYY-MM-DD) instead.

EXAMPLES¶

mpstat 2 5

mpstat -P ALL 2 5

BUGS¶

/proc filesystem must be mounted for the mpstat command to work.

Only a few activities are given by the Linux kernel for each processor.

FILES¶

/proc contains various files with system statistics.

AUTHOR¶

Sebastien Godard (sysstat <at> orange.fr)

SEE ALSO¶

sar(1), pidstat(1), iostat(1), vmstat(8)

http://pagesperso-orange.fr/sebastien.godard/