MPSTAT(1) Linux User's Manual MPSTAT(1)
NAME
mpstat - Report processors related statistics.
SYNOPSIS
mpstat [ -A ] [ --dec={ 0 | 1 | 2 } ] [ -H ] [ -n ] [ -u ] [ -T ] [ -V ]
[ -I { keyword[,...] | ALL } ] [ -N { node_list | ALL } ] [ -o JSON ] [
-P { cpu_list | ALL } ] [ interval [ count ] ]
DESCRIPTION
The mpstat command writes to standard output activities for each avail-
able processor, processor 0 being the first one. Global average activi-
ties 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 parame-
ter, the mpstat command generates reports continuously.
OPTIONS
-A This option is equivalent to specifying -n -u -I ALL. This op-
tion 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 vC-
PUs.
-I { keyword[,...] | ALL }
Report interrupts statistics. Possible keywords are CPU, SCPU,
and SUM.
With the CPU keyword, the number of each individual interrupt re-
ceived 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 in-
terrupt received per second by the CPU or CPUs is displayed. This
option works only with kernels 2.6.31 and later. Software inter-
rupts 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 statis-
tics 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) for-
mat. 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 proces-
sor, and processor all is the global average among all proces-
sors. The ALL keyword indicates that statistics are to be re-
ported for all processors. Offline processors are not displayed.
-T Display topology elements in the CPU report (see option -u be-
low). The following elements are displayed:
CORE Logical core number.
SOCK Logical socket number.
NODE Logical NUMA node number.
-u Report CPU utilization. The following values are displayed:
CPU Processor number. The keyword all indicates that statis-
tics 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 soft-
ware interrupts.
%iowait
Show the percentage of time that the CPU or CPUs were idle
during which the system had an outstanding disk I/O re-
quest.
%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 re-
quest.
-V Print version number then exit.
ENVIRONMENT
The mpstat command takes into account the following environment vari-
able:
S_COLORS
By default statistics are displayed in color when the output is
connected to a terminal. Use this variable to change the set-
tings. 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 statis-
tics on the terminal. Its value is a colon-separated list of ca-
pabilities 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 met-
ric'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 lo-
cale will be ignored when printing the date in the report header.
The mpstat command will use the ISO 8601 format (YYYY-MM-DD) in-
stead. The timestamp will also be compliant with ISO 8601 for-
mat.
EXAMPLES
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 sec-
ond intervals.
BUGS
/proc filesystem must be mounted for the mpstat command to work.
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)
https://github.com/sysstat/sysstat
https://sysstat.github.io/
Linux AUGUST 2023 MPSTAT(1)
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