title: what does WAIT_FOR_CONCURRENT_GC blocked mean?
body: <p>I just did an automatic update from ICS (4.0.4) to JB (4.1) on my android phone and it introduced multiple garbage collection calls when I run my app:</p>
  
  <pre><code>WAIT_FOR_CONCURRENT_GC blocked 30ms
  </code></pre>
  
  <p>I'm streaming video in my app and these blocked GC calls are almost doubling my latency, what do they mean? </p>