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    Command:

    mpstat

    
    
    

    SYNOPSIS

           mpstat  [  -A  ]  [  -I  { SUM | CPU | SCPU | ALL } ] [ -u ] [ -P { cpu
           [,...] | ON | ALL } ] [ -V ] [ interval [ count ] ]
    
    
    

    DESCRIPTION

           The mpstat command writes to standard output activities for each avail-
           able processor, processor 0 being the first one.  Global average activ-
           ities 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 parame-
           ter, the mpstat command generates reports continuously.
    
    
    

    OPTIONS

           -A     This option is equivalent to specifying -I ALL -u -P ALL
    
           -I { SUM | CPU | SCPU | ALL }
                  Report interrupts statistics.
    
                  With the SUM keyword, the mpstat command reports the total  num-
                  ber  of interrupts per processor.  The following values are dis-
                  played:
    
                  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.
    
                  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
                         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 servic-
                         ing another virtual processor.
    
                  %guest
                         Show the percentage of time spent by the CPU or  CPUs  to
                         run a virtual processor.
    
                  %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 activ-
                  ity at all is a disabled (offline) processor.
    
           -V     Print version number then exit.
    
    
    

    ENVIRONMENT

           The mpstat command takes into account the following  environment  vari-
           able:
    
           S_TIME_FORMAT
                  If  this  variable  exists and its value is ISO then the current
    
    
    

    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 AUGUST 2011 MPSTAT(1)

    
    
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