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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | EXAMPLES | BUGS | FILES | AUTHOR | SEE ALSO | COLOPHON |
MPSTAT(1) Linux User's Manual MPSTAT(1)
mpstat - Report processors related statistics.
mpstat [ -A ] [ -n ] [ -u ] [ -V ] [ -I { keyword [,...] | ALL } ] [
-N { node_list | ALL } ] [ -o JSON ] [ -P { cpu_list | ON | 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 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.
-A This option is equivalent to specifying -n -u -I ALL -N ALL -P
ALL
-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
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 | ON | 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 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
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.
Note: On SMP machines a processor that does not have any
activity at all is a disabled (offline) processor.
-V Print version number then exit.
The mpstat command takes into account the following environment
variable:
S_COLORS
When this variable is set, display statistics in color on the
terminal. Possible values for this variable are never, always
or auto (the latter is the default).
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
H=31;1:I=32;22:M=35;1:N=34;1:Z=34;22. Supported capabilities
are:
H= SGR (Select Graphic Rendition) substring for percentage
values greater than or equal to 75%.
I= SGR substring for CPU number.
M= SGR substring for percentage values in the range from
50% to 75%.
N= SGR substring for non-zero statistics values.
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.
Only a few activities are given by the Linux kernel for each
processor.
/proc contains various files with system statistics.
Sebastien Godard (sysstat <at> orange.fr)
sar(1), pidstat(1), iostat(1), vmstat(8)
http://pagesperso-orange.fr/sebastien.godard/
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 systat-AT-orange.fr. This
page was obtained from the project's upstream Git repository
⟨https://github.com/sysstat/sysstat.git⟩ on 2017-07-05. If you dis‐
cover 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 man-pages@man7.org
Linux MAY 2017 MPSTAT(1)
Pages that refer to this page: cifsiostat(1), iostat(1), iowatcher(1), nfsiostat-sysstat(1), pcp-mpstat(1), pidstat(1), sar(1), tapestat(1), vmstat(8)