i wonder the implications for ESX, my guess is that it should be enabled in all virt scenarios
Intel released a new optimization manual. To get the best local latency, enable on-die NUMA/clustering. 4 NUMA nodes per CPU. Chapter 8.pic.twitter.com/Oiovb9s0wa
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Is there any significant difference between the 4x4 and 2x2 matrix? The 4x4 basically looks like the 2x2 expanded into blocks + some noise
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Dual socket - so cross socket comms
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That's the same NUMA clustering as EPYC.
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Oh the irony.
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see Chapter 8: Introducing sub-numa clustering https://software.intel.com/sites/default/files/managed/9e/bc/64-ia-32-architectures-optimization-manual.pdf …
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Yup, that's where I got it from ;)
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What was the recommendation for Broadwell-E, 2 NUMA nodes per CPU due to 2 separate Ringbuses?
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I don't see a really good advantage of using SNC, the disparities on latencies are quite substantial in socket interconnections
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