title: Fermi L2 cache hit latency?
body: <p>Does anyone know related information about L2 cache in Fermi? I have heard that it is as slow as global memory, and the use of L2 is just to enlarge the memory bandwidth. But I can't find any official source to confirm this. Did anyone measure the hit latency of L2? What about size, line size, and other paramters?</p>
  
  <p>In effect, how do L2 read misses affect the performance? In my sense, L2 only has a meaning in very memory-bound applications. 
  Please feel free to give your opinions.</p>
  
  <p>Thanks</p>