This will be good to keep in mind when looking at performance reports. The main performance numbers I've seen so far are from two kinds of sources: 1. Local b

This will be good to keep in mind when looking at performance reports. The main performance numbers I've seen so far are from two kinds of sources: 1. Local benchmarks like the Phoronix benchmarks, which I think are all on physical hardware with PCID. 2. Reports from cloud customers like https://forums.aws.amazon.com/thread.jspa?threadID=269858 https://forums.aws.amazon.com/thread.jspa?threadID=269858 and https://twitter.com/chanian/status/949457156071288833 https://twitter.com/chanian/status/949457156071288833. These are with a patched host, but with an unpatched guest OS. The best case scenario here seems to be that it doesn't degrade much further when the guest OS is patched. I don't think I've seen any numbers yet for AWS with a patched guest OS - this would be interesting to see on instances with and without PCID support.