mpstat(1) - phpMan

Command: man perldoc info search(apropos)  


MPSTAT(1)                              Linux User's Manual                              MPSTAT(1)



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, pro-
       cessor  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  inter-
       val  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
                     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.

              With the CPU keyword, the number of each individual interrupt received  per  second
              by the CPU or CPUs is displayed.

              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.

              The  ALL  keyword  is equivalent to specifying all the keywords above and therefore
              all the interrupts statistics are displayed.

       -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
                     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  pro-
                     cessor.

              %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  dis-
              abled (offline) processor.

       -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
              Display five reports of global statistics among all processors at two second inter-
              vals.

       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.

       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/



Linux                                     SEPTEMBER 2012                                MPSTAT(1)

Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2018-05-27 04:58 @127.0.0.1 CrawledBy CCBot/2.0 (http://commoncrawl.org/faq/)
Valid XHTML 1.0!Valid CSS!