TIL: I have literally no idea how the Zen L1 data cache works. It apparently uses linear-address-based prediction on loads, so it is not like a Skylake L1 at all...
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Are you just going to tease us or are you going to share?
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The issue was "but how can just accessing one way work" and my assumption is that it scans all utags for each set to find the way candidate, but then the tag and data lookups only need to check in the (at most one) matching ways.
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