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Was NetBurst the last clean sheet Intel microarchitecture design?
by scrlk 4y ago
Was NetBurst the last clean sheet Intel microarchitecture design?
- bonzini 4y agoNo, Atom came later.
- throwaheyy 4y agoWasn’t Atom based off the P5 (original Pentium) core and not a clean sheet, making Itanium the last clean sheet design?
- bonzini 4y agoThey had similar superscalar abilities (2 instructions per cycle, in order) but it was not based on the P5 as far as I know. It was a pretty deep pipeline, unlike the one in the P5, and didn't have any AGU stalls. Larrabee was based on the P5 though.
- throwaheyy 4y agoAh, that’s the one I was confusing it with, thank you.
- bogomipz 4y agoWhat does "clean sheet" mean here?
- scrlk 4y agoA completely new design, typically breaking away from the previous design (AMD's Zen microarchitecture being a more recent example).
- glowingly 4y agoThat did keep some previous aspects of AMD design, notably subclusters of shared last level cache on a single chip. Zen1 and Zen2 used 4 core clusters of shared L3, with accesses to the other 4 core cluster requiring a bit more latency as it was going outside of the CCX. Zen3 changed this, so it no longer applies in the same way. The result was some latency graphs such as: https://www.anandtech.com/show/15708/amds-mobile-revival-redefining-the-notebook-business-with-the-ryzen-9-4900hs-a-review/2 https://www.anandtech.com/show/15708/amds-mobile-revival-red...