Fixed in the following COS stable images back in January:
cos-stable-79-12607-80-0
cos-stable-77-12371-141-0
cos-stable-73-11647-415-0
cos-stable-78-12499-89-0
Hey, didn't notice your comment when I posted mine. But I'm seeing similar behavior on GKE 1.15.12-gke.3: CPU throttling even when CPU usage < CPU limits. https://news.ycombinator.com/item?id=24351566
According to https://cloud.google.com/container-optimized-os/docs/release...