title: How to determine when Docker containers (on an M1 MacBook) are running via qemu?
body: <p>It has been <a href="https://news.ycombinator.com/item?id=25447153" rel="noreferrer">mentioned</a> that when employing x86_64 Docker images on an M1 Mac, when no ARM64 image is available, that container will start under <code>qemu</code> emulation for compatibility. (At the cost of performance.)</p>
  <p>Often times when I'm running a collection of containers (and integration tests against the lot), I'll see <code>qemu-system-aarch64</code> pegging a few cores.</p>
  <p>My question: How can I determine, for a given list of running containers (ie. <code>docker ps</code>), which ones are running natively and which are being emulated?</p>