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I thought it was spelled out quite clearly in TFA: "GFNI". GFNI Was only added to AMD CPUs in Zen4, basically the "just released" server CPUs (codename: Genoa)
by dijit 3y ago
I thought it was spelled out quite clearly in TFA: "GFNI".
GFNI Was only added to AMD CPUs in Zen4, basically the "just released" server CPUs (codename: Genoa) which are currently quite difficult to procure, even 6 months after announcement.
- zokier 3y agoI don't see how that explains the encoding:reconstruction perf relationship. Looking at the first pair (12+4 encoding), epyc is about twice as fast as avx2-intel and four times as fast as graviton at encoding. But in reconstruction its two to three times slower than either.
- re-thc 3y agoGenoa’s been delayed due to memory controller issues.
- rektide 3y agoEven running AVX2, Intel is walloping the 48-core Epyc, on decode specifically.