These instructions are deliberately very basic. If you want something clever,
  go read the real docs ;-) Please don't add more stuff, but feel free to 
  correct my mistakes ;-)    (mbligh@aracnet.com)
  Thanks to John Levon, Dave Hansen, et al. for help writing this.
  
  <test> is the thing you're trying to measure.
  Make sure you have the correct System.map / vmlinux referenced!
  
  It is probably easiest to use "make install" for linux and hack
  /sbin/installkernel to copy vmlinux to /boot, in addition to vmlinuz,
  config, System.map, which are usually installed by default.
  
  Readprofile
  -----------
  A recent readprofile command is needed for 2.6, such as found in util-linux
  2.12a, which can be downloaded from:
  
  http://www.kernel.org/pub/linux/utils/util-linux/
  
  Most distributions will ship it already.
  
  Add "profile=2" to the kernel command line.
  
  clear		readprofile -r
  		<test>
  dump output	readprofile -m /boot/System.map > captured_profile
  
  Oprofile
  --------

  
  Get the source (see Changes for required version) from
  http://oprofile.sourceforge.net/ and add "idle=poll" to the kernel command
  line.

  Configure with CONFIG_PROFILING=y and CONFIG_OPROFILE=y & reboot on new kernel

  ./configure --with-kernel-support
  make install
  
  For superior results, be sure to enable the local APIC. If opreport sees
  a 0Hz CPU, APIC was not on. Be aware that idle=poll may mean a performance
  penalty.
  
  One time setup:
  		opcontrol --setup --vmlinux=/boot/vmlinux
  
  clear		opcontrol --reset
  start		opcontrol --start
  		<test>
  stop		opcontrol --stop
  dump output	opreport >  output_file

  To only report on the kernel, run opreport -l /boot/vmlinux > output_file

  
  A reset is needed to clear old statistics, which survive a reboot.