Based on #60589 (comment)

After enabling quotas (specifically pods per namespace) by default in our tests, we're continuously seeing such failures:

Container kube-controller-manager-e2e-big-master/kube-controller-manager is using 0.531144723/0.5 CPU
not to have occurred

This may be a serious issue with scalability of quotas and needs some digging in.

/assign @gmarek
(who enabled it.. feel free to redirect this as apt)

cc @kubernetes/sig-scalability-bugs