title: Look Through vs Look aside
body: <p>Suppose there are 2 caches L1 and L2</p>
  
  <ul>
  <li>L1
  
  <ul>
  <li>Hit rate of L1=0.8</li>
  <li>Access time of l1=2ns</li>
  <li>and transfer time b/w L1 and CPU is 10ns</li>
  </ul></li>
  <li>L2
  
  <ul>
  <li>Hit rate of L2=0.9</li>
  <li>Access time of L2 =5ns</li>
  <li>and transfer time b/w L2 and L1 is 100ns</li>
  </ul></li>
  </ul>
  
  <p>What will be the effective access time in case of Look through and Look aside policies.</p>