Ubuntu Manpage: mpstat - Report processors related statistics.

NAME

       mpstat - Report processors related statistics.

SYNOPSIS

       mpstat  [  -A ] [ --dec={ 0 | 1 | 2 } ] [ -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 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.

OPTIONS

-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).

-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 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.

ENVIRONMENT

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
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.

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 second 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)