You seem pretty certain this will manifest as a noticeable performance hit. Can this kind of thing be easily measured in practice? I don't know if my workloads would be memory latency sensitive and worse, I don't even have a clue how I would find out.
I'm not too concerned though, since I already use Zen 1 and it looks to be around the same. If I had to take a shot in the dark, I'm guessing it's just a consequence of the chiplet designs of Zen and Zen 2 that enabled them to scale so well. If it is such a tradeoff and there is not future gains to be made on latency for Zen platforms, I can accept that.
Though it does make me curious if Intel will ever stumble upon the same problems.
I'm not too concerned though, since I already use Zen 1 and it looks to be around the same. If I had to take a shot in the dark, I'm guessing it's just a consequence of the chiplet designs of Zen and Zen 2 that enabled them to scale so well. If it is such a tradeoff and there is not future gains to be made on latency for Zen platforms, I can accept that.
Though it does make me curious if Intel will ever stumble upon the same problems.