STATS(8)                                                 STATS(8)

     NAME
          stats - display graphs of system activity

     SYNOPSIS
          stats [ -option ] [ machine ...  ]

     DESCRIPTION
          Stats displays a rolling graph of various statistics col-
          lected by the operating system and updated once per second.
          The statistics may be from a remote machine or multiple
          machines, whose graphs will appear in adjacent columns.  The
          columns are labeled by the machine names and the number of
          processors on the machine if it is a multiprocessor.

          The right mouse button presents a menu to enable and disable
          the display of various statistics; by default, stats begins
          by showing the load average on the executing machine.

          The lower-case options choose the initial set to display:

          b battery    percentage battery life remaining.
          c context    number of process context switches per second.
          e ether      total number of packets sent and received per
                       second.
          E etherin,out
                       number of packets sent and received per second,
                       displayed as separate graphs.
          f fault      number of page faults per second.
          i intr       number of interrupts per second.
          I idle       system load, % time in idle, and % time in
                       interrupts.  The last two are averaged over all
                       processors on a multiprocessor.
          l load       (default) system load average.  The load is
                       computed as a running average of the number of
                       processes ready to run, multiplied by 1000.
          m mem        total pages of active memory.  The graph dis-
                       plays the fraction of the machine's total mem-
                       ory in use.
          n etherin,out,err
                       number of packets sent and received per second,
                       and total number of errors, displayed as sepa-
                       rate graphs.
          p tlbpurge   number of translation lookaside buffer flushes
                       per second.
          s syscall    number of system calls per second.
          t tlbmiss    number of translation lookaside buffer misses
                       per second.
          w swap       number of valid pages on the swap device.  The
                       swap is displayed as a fraction of the number
                       of swap pages configured by the machine.

     STATS(8)                                                 STATS(8)

          8 802.11b    display the signal strength detected by the
                       802.11b wireless ether card; the value is usu-
                       ally below 50% unless the receiver is in the
                       same room as the transmitter, so a midrange
                       value represents a strong signal.

          The graphs are plotted with time on the horizontal axis.
          The vertical axes range from 0 to 1000*sleepsecs, multiplied
          by the number of processors on the machine when appropriate.
          The only exceptions are memory, and swap space, which dis-
          play fractions of the total available, system load, which
          displays a number between 0 and 1000, idle and intr, which
          display percentages and the Ethernet error count, which goes
          from 0 to 10..  If the value of the parameter is too large
          for the visible range, its value is shown in decimal in the
          upper left corner of the graph.

          Upper-case options control details of the display.  All
          graphs are affected; there is no mechanism to affect only
          one graph.

          -T sleepsecs
               Set the number of seconds between samples to sleepsecs
               (default one second).  Sleepsecs may be a floating-
               point number.

          -S scale
               Sets a scale factor for the displays.  A value of 2,
               for example, means that the highest value plotted will
               be twice as large as the default.

          -L   Plot all graphs with logarithmic y axes.  The graph is
               plotted so the maximum value that would be displayed on
               a linear graph is 2/3 of the way up the y axis and the
               total range of the graph is a factor of 1000; thus the
               y origin is 1/100 of the default maximum value and the
               top of the graph is 10 times the default maximum.

          -Y   If the display is large enough to show them, place
               value markers along the y axes of the graphs.  Since
               one set of markers serves for all machines across the
               display, the values in the markers disregard scaling
               factors due to multiple processors on the machines. On
               a graph for a multiprocessor, the displayed values will
               be larger than the markers indicate.  The markers
               appear along the right, and the markers show values
               appropriate to the rightmost machine; this only matters
               for graphs such as memory that have machine-specific
               maxima.

     FILES
          /net/ether0/0/stats

     STATS(8)                                                 STATS(8)

          #c/swap
          #c/sysstat

     SOURCE
          /sys/src/cmd/stats.c

     BUGS
          Some machines do not have TLB hardware.