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A comment on AMD lands Google, Twitter as customers with newest server chip. Parent comment

Re:AMD lands Google, Twitter as customers with newest server... by jdsully on Thursday August 08, 2019 @05:55PM (#20649240)
That is true with Intel chips as well. In the HFT space people actively work with Intel to determine which cores they should pin tasks to.

The speed of light is constant, and some cores will always be a little closer to various resources.

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Re:AMD lands Google, Twitter as customers with newest server... by shaklee3 on Friday August 09, 2019 @12:31AM (#20651354)
That was true before Skylake, but is no longer true since they moved away from the multi ring architecture.
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Re:AMD lands Google, Twitter as customers with newest server... by jdsully on Friday August 09, 2019 @12:46AM (#20651406)
Even with the mesh the number of hops is variable based on which core is requesting and the physical geometry of the chip. The cores right beside the IMC will have the lowest latency. See this diagram: https://en.wikichip.org/wiki/intel/mesh_interconnect_archite...

The main improvement is the max number of hops is log(n) instead N/2.

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