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"8-core processor with 66 threads per core." 66*8 = 528. Why 66 is not explained.
by wging 3y ago
"8-core processor with 66 threads per core." 66*8 = 528. Why 66 is not explained.
- teruakohatu 3y agoMaybe they just couldn't fit 67?
- loeg 3y agoMaybe 2 higher-powered primary threads + 64 aux threads or something. I don't know how that makes sense as part of a single core but I don't have a better guess.
- wmf 3y agoThat's what it is, as shown on slide 6 (Die Architecture). Personally I would call this 16 big cores and 32 throughput cores but for some reason Intel is calling it 8 cores.
- lambda 3y agoYes it is. They have four 16 thread pipelines, and two single thread pipelines per core. 4*16=64 and 64+2=66
- mattashii 3y agoSo, why do they consider that 1 core? Isn't that more like a "compute complex" of multiple cores, as seen on zen 2, but with different core architectures attached instead of 4 cores of the same design?
- Symmetry 3y agoI'd be inclined to call them multiple cores myself, but if they all share the same pipe to main memory that would be a plausible reason to call them all the same core.
- adrianmonk 3y agoLook at slide 6, "Die Architecture" (https://www.servethehome.com/wp-content/uploads/2023/08/Intel-Direct-Mesh-to-Mesh-Optical-Fabric_Page_06-scaled.jpg https://www.servethehome.com/wp-content/uploads/2023/08/Inte...). The diagram shows 8 gray boxes (in 2 columns of 4). Each gray box is a core. Above that is a detailed view of what each core looks like. There's a middle section labeled "Crossbar", and above that are 3 boxes labeled STP, MTP, and MTP. Below that are another 3 identical boxes. So each core has 4x MTPs and 2x STP. What are those? The text of the same slide says MTP is "Multi-Threaded Pipelines" with "16 threads per pipeline" and STP is "Single-Threaded Pipelines" with (self-evidently) 1 thread per pipeline. And 4 * 16 + 2 * 1 = 66, so 66 threads per core.
- Patrick-STH 3y agoGood one. These presentations are like 30 min each so it is hard to stay on top of all of them.
- adrian_b 3y ago66 = 64 slow GPU-like threads + 2 very fast CPU-like threads