Re:Intel CPU Die Topology
by jcranmer on Sunday May 28, 2023 @10:18AM
(#36104193)
IIRC, core 0 is the one that tends to service processor interrupts, which may mean that the data is unusually noisy in a way that tends to underestimate the RTT latency time.
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There’s a similar weird artifact at index 64.
Core 64 is the hyper-threaded pair of core 0.