title: Measuring CPU efficiency of bare metal ARM Cortex A9 system
body: <p>I have a bare metal program implemented on on of the core of the ARM-Cortex A9 processor. The program will be handling 2 interrupts. Now i would like to measure the efficiency of this CPU. May be the ratio of the time the CPU is idle to the time the CPU is busy. I am using a zedboard  (zynq 7000 series) for my  measurements. </p>
  
  <p>Since i do not have a operating system running on the core, i am now aware on how to get CPU efficiency. </p>
  
  <p>Cheers,
  S</p>