title: Why is my .Net app only using single NUMA node?
body: <p>I have a server with 2 NUMA node with 16 CPUs each. I can see all the 32 CPUs in task manager, first 16 (NUMA node 1) in the first 2 rows and the next 16 (NUMA node 2) in the last 2 rows.</p>
  
  <p>In my app I am starting 64 threads, using <code>Thread.Start()</code>. When I run the app, it's CPU intensive, only the first 16 CPUs are busy, the other 16 CPUs are idle.</p>
  
  <p>Why? I am using <code>Interlocked.Increment()</code> a lot. Could this be a reason?
  Is there a way I can start threads on a specific NUMA node?</p>