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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | EXAMPLES | BUGS | FILES | AUTHOR | SEE ALSO | COLOPHON |
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MPSTAT(1) Linux User's Manual MPSTAT(1)
mpstat - Report processors related statistics.
mpstat [ -A ] [ --dec={ 0 | 1 | 2 } ] [ -H ] [ -n ] [ -U ] [ -u ]
[ -T ] [ -V ] [ -I { keyword[,...] | ALL } ] [ -N { node_list |
ALL } ] [ -o JSON ] [ -P { cpu_list | ALL } ] [ interval [ count ]
]
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 on both 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.
-A This option is equivalent to specifying -n -u -I ALL. This
option also implies specifying -N ALL -P ALL unless these
options are explicitly set on the command line.
--dec={ 0 | 1 | 2 }
Specify the number of decimal places to use (0 to 2,
default value is 2).
-H Also detect and display statistics for physically
hotplugged vCPUs.
-I { keyword[,...] | ALL }
Report interrupts statistics. Possible keywords are CPU,
SCPU, and SUM.
With the CPU keyword, the number of each individual
interrupt received per second by the CPU or CPUs is
displayed. Interrupts are those listed in /proc/interrupts
file.
With the SCPU keyword, the number of each individual
software interrupt received per second by the CPU or CPUs
is displayed. This option works only with kernels 2.6.31
and later. Software interrupts are those listed in
/proc/softirqs file.
With the SUM keyword, the mpstat command reports the total
number of interrupts per processor. The following values
are displayed:
CPU Processor number. The keyword all indicates that
statistics are calculated as averages among all
processors.
intr/s Show the total number of interrupts received per
second by the CPU or CPUs.
The ALL keyword is equivalent to specifying all the
keywords above and therefore all the interrupts statistics
are displayed.
-N { node_list | ALL }
Indicate the NUMA nodes for which statistics are to be
reported. node_list is a list of comma-separated values or
range of values (e.g., 0,2,4-7,12-). Note that node all is
the global average among all nodes. The ALL keyword
indicates that statistics are to be reported for all nodes.
-n Report summary CPU statistics based on NUMA node placement.
The following values are displayed:
NODE Logical NUMA node number. The keyword all indicates
that statistics are calculated as averages among all
nodes.
All the other fields are the same as those displayed with
option -u (see below).
-o JSON
Display the statistics in JSON (JavaScript Object Notation)
format. JSON output field order is undefined, and new
fields may be added in the future.
-P { cpu_list | ALL }
Indicate the processors for which statistics are to be
reported. cpu_list is a list of comma-separated values or
range of values (e.g., 0,2,4-7,12-). Note that processor 0
is the first processor, and processor all is the global
average among all processors. The ALL keyword indicates
that statistics are to be reported for all processors.
Offline processors are not displayed.
-T Display topology elements in the CPU report (see option -u
below). The following elements are displayed:
CORE Logical core number.
SOCK Logical socket number.
NODE Logical NUMA node number.
-U Display timestamp (UTC - Coordinated Universal Time) in
seconds from the epoch.
-u Report CPU utilization. The following values are displayed:
CPU Processor number. The keyword all indicates that
statistics are calculated as averages among all
processors.
%usr Show the percentage of CPU utilization that occurred
while executing at the user level (application).
%nice Show the percentage of CPU utilization that occurred
while executing at the user level with nice
priority.
%sys Show the percentage of CPU utilization that occurred
while executing at the system level (kernel). Note
that this does not include time spent servicing
hardware and software interrupts.
%iowait
Show the percentage of time that the CPU or CPUs
were idle during which the system had an outstanding
disk I/O request.
%irq Show the percentage of time spent by the CPU or CPUs
to service hardware interrupts.
%soft Show the percentage of time spent by the CPU or CPUs
to service software interrupts.
%steal Show the percentage of time spent in involuntary
wait by the virtual CPU or CPUs while the hypervisor
was servicing another virtual processor.
%guest Show the percentage of time spent by the CPU or CPUs
to run a virtual processor.
%gnice Show the percentage of time spent by the CPU or CPUs
to run a niced guest.
%idle Show the percentage of time that the CPU or CPUs
were idle and the system did not have an outstanding
disk I/O request.
-V Print version number then exit.
The mpstat command takes into account the following environment
variable:
S_COLORS
By default statistics are displayed in color when the
output is connected to a terminal. Use this variable to
change the settings. Possible values for this variable are
never, always or auto (the latter is equivalent to the
default settings).
Please note that the color (being red, yellow, or some
other color) used to display a value is not indicative of
any kind of issue simply because of the color. It only
indicates different ranges of values.
S_COLORS_SGR
Specify the colors and other attributes used to display
statistics on the terminal. Its value is a colon-separated
list of capabilities that defaults to
I=32;22:N=34;1:W=35;1:X=31;1:Z=34;22. Supported
capabilities are:
I= SGR (Select Graphic Rendition) substring for CPU
number.
N= SGR substring for non-zero statistics values.
W= (or M=)
SGR substring for percentage values in the range
from 75% to 90% (or in the range 10% to 25%
depending on the metric's meaning).
X= (or H=)
SGR substring for percentage values greater than or
equal to 90% (or lower than or equal to 10%
depending on the metric's meaning).
Z= SGR substring for zero values.
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. The timestamp will also
be compliant with ISO 8601 format.
mpstat 2 5
Display five reports of global statistics among all
processors at two second intervals.
mpstat -P ALL 2 5
Display five reports of statistics for all processors at
two second intervals.
/proc filesystem must be mounted for the mpstat command to work.
/proc contains various files with system statistics.
Sebastien Godard (sysstat <at> orange.fr)
sar(1), pidstat(1), iostat(1), vmstat(8)
https://github.com/sysstat/sysstat
https://sysstat.github.io/
This page is part of the sysstat (sysstat performance monitoring
tools) project. Information about the project can be found at
⟨http://sebastien.godard.pagesperso-orange.fr/⟩. If you have a bug
report for this manual page, send it to sysstat-AT-orange.fr.
This page was obtained from the project's upstream Git repository
⟨https://github.com/sysstat/sysstat.git⟩ on 2025-08-11. (At that
time, the date of the most recent commit that was found in the
repository was 2025-08-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
Linux JULY 2025 MPSTAT(1)
Pages that refer to this page: cifsiostat(1), iostat(1), iowatcher(1), pcp-mpstat(1), pidstat(1), sar(1), tapestat(1), vmstat(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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