I have been told in the past that I over-value coherence, and I have tried to not think the coherency domain should be the size of a datacenter. Which would be my natural inclination. (Smile) Very good points above, and I will take this as an assignment.
]]>TPM does the absolute best in his writing, and asks the hard questions that hold technology peddlers proverbial feet to the fire to explain why their proposed value matters to customers. I was involved in CAPI, CCIX, but thankfully not Gen-Z. I hold patents in cloud and RDMA technology inventions. This is coming from a place of intimate knowledge.
Timothy, I humbly submit to you a request to deep dive on coherence (which to some extent would be an update from Nov 23, 2021 “FINALLY, A COHERENT INTERCONNECT STRATEGY: CXL ABSORBS GEN-Z”). I think the consumers of this tech needs the answers from a knowledgeable neutral party that can interrogate vendors, software developers/ISV’s on why memory coherence matters. I hope the answer isn’t “because CSP’s requested it to help their memory disaggregation dreams come true” as that dog just doesn’t TCO hunt.
Respect.
]]>With these upgrades, It looks like they can now pretty-much make an MS Eagle-equivalent machine (Top500 #3) with an 8×8 array of DXG Grace-Blackwell GB200 NVL72 racks … which is impressively compact! No wonder Jensen can bake them in his home’s kitchen oven! (eh-eh-eh!)
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