We got bit by this recently when we were running code on some m1.large machines and incorrectly assumed that all m1.larges supported SSE4.2 (which this paper do

We got bit by this recently when we were running code on some m1.large machines and incorrectly assumed that all m1.larges supported SSE4.2 (which this paper doesn't mention). The only way to guarantee that you get a specific processor type is to use cluster compute instance or play roulette while you are booting instances, neither of which are ideal (which this talk presumably says). I'm not sure what the ideal way to resolve this outside of further subdividing instance types or rebalancing CPUs so that more advanced CPUs are used at the high end in a consistent manner or if users should be able to request a specific CPU type. (but hopefully jeffbarr will read this and put it on a todolist somewhere)