cpu.tk

   Plot CPU usage as a stacked Bar chart

   C. W. Wright  5/3/1998  
   <a href=mailto:wright@web-spanREMOVE.com>C. W. Wright</a>
   <a href=http://www.web-span.com>www.web-span.com</a>

   Plot CPU usage as a stacked bar chart.  Will only run on systems
   that have /proc/stat  ( Linux )


   INSTALLATION

   1) untar, 2) determine where your wish lives, 3) edit cpu.tk and
   fix the #!/usr/bin/wish -f  to agree with your system, 4) Make
   cpu.tk readable/executable, 5) run it as ./cpu.tk  


   DESCRIPTION   

   The data are taken from /proc/stat cpu line which gives the
   total ticks used by user, nice, system, and the idle loop.  The idle
   Parameter doesn't seem to work. The program works by 1) reading 
   the /proc/stat first line, 2) waiting a bit, 3) subtracting the values
   acquired from each read and 4) adding them up for a total and then
   dividing the total into each of them to get the percentage of time
   used by each, then 5) drawing a stacked bar chart of the results.
   As it is, Green is IDLE time, Blue SYSTEM, and RED is USER.

   The display may be rescaled by dragging it to a different size.  It
   actually loads the system *less* than "top".  Change the "interval"
   variable to the number of milliseconds you want the program to update.

   This program was quickly hacked together using tcl7.6/tk4.2 without
   any special library.   It would be *much* simpler done with the 
   BLT library as it already has a stacked bar chart command.