I remember a while ago reading about storing your encryption keys in L2 instead of ram and deliberate "abuse" of the L3 cache on VPS hosts however can't find that article and haven't kept up with the news on it.
Given that the intel cpu patches have reduced CPU performance by ~15% ( again sorry don't have the exact source) I'd say there has been quite significant changes in cache management in the name of security.
Thanks for the info. It's a dilemma when allocating instances because I want the full per-core performance but I don't need a full socket's worth of cores, so I just have to hope my neighbors aren't running huge jobs all the time.
https://www.anandtech.com/show/11550/the-intel-skylakex-revi...
I remember a while ago reading about storing your encryption keys in L2 instead of ram and deliberate "abuse" of the L3 cache on VPS hosts however can't find that article and haven't kept up with the news on it.
Given that the intel cpu patches have reduced CPU performance by ~15% ( again sorry don't have the exact source) I'd say there has been quite significant changes in cache management in the name of security.