Mr Bill wrote:So, Intel has a mesh in which each "node" has channeling, caching, and routing capacity? But AMD's mesh more resembles a bunch of data channels between nodes? But if the nodes are CPU cores, don't the nodes then also have caching and routing capacity too?
AMD's Infinity fabric is less of an intra-core mesh and more of an inter-core mesh. Maybe I'm splitting meaningless hairs, but I see it as a intra-core communications network as nothing inside the CCX uses it to talk elsewhere within the CCX.
The L2 in Ryzen is private so that data doesn't get shared across cores, all the cores in each complex have direct access to the L3 instead. I don't believe the Infinity Fabric even comes into play unless cores on a different CCX want to pull data from another CCX's L3. So Intel's mesh topology is a fair bit different than how AMD designed its chips. It might be more accurate to say each CCX is in a mesh network, or each CCX is a node in a mesh.
Mr Bill wrote:Vhalidictes wrote:MCM = Multi-Chip Module
Thanks! When it came up in the discussion, I thought it must be a reference to mesh or fabric and that was confusing.
Half of the topics in these forums goes over my head too
I may not even be fully accurate, I enjoy reading deep dives but that doesn't mean I catch the important connections or even understand the material.