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This reminds me: has anyone ever figured out why Zen 3 was missing memory renaming, but it came back in Zen 4 and Zen 5?

• Tuna-Fish 1y ago
  AMD had two leapfrogging CPU design teams. Memory renaming was added by the team that did Zen2, presumably the Zen3 team couldn't import it in time for some reason.
  • JackYoustra 1y ago
    Any writeups on why they chose this system, whether its still used today, etc? I'm completely unfamiliar with this style of management.
    • throwaway81523 1y ago
      Dunno about writeups but I've worked in that system. Basically the product lifecycle is longer than one product generation. So you get to stay with it through the development, test/release, and maintenance phases, which are arranged to be 2 release cycles. It didn't seem paradoxical or anything. It just made sense.
      • Sesse__ 1y ago
        It depends on having two CPU teams, though. There are not that many teams in the world that can design a high-performance microprocessor; I would assume that AMD has two and Apple has only one (which is why you got all these fillers with just larger and larger M1s in a trenchcoat, while the team was busy trying to make M3 happen).