Unfortunately, that raises the question: what is over-subscription?<p>Unless you&#x27;re prepared to have many potentially-idle cores around, due to 1-1 bindings with an unknown, erratic, or uncontrollable workload, we&#x27;re suddenly in a pretty tricky realm. You can get around this, but only in very specific and known use-cases you have control over; and I suspect the majority of use-cases fall well outside this.<p>If you want to more efficiently take advantage of free resources with relatively unpredictable or uncontrollable workloads (e.g. most cloud providers), binding threads to cores is a problem.