On Thu, 10 Feb 2022 08:46:37 +0000, Stuart Henderson wrote: > The numbers come from what's reported by the relevant CPUID instruction, > the only one actually used by OpenBSD is smt to disable all but one > thread in a core, otherwise they're just for information. > > I'm not sure the reason for the gaps in numbering on some AMDs, but the > documentation just talks about IDs and doesn't imply that they have to > be contiguous. (https://www.amd.com/system/files/TechDocs/24594.pdf > page 629).
I'd guess that the gaps represent cores present on the chiplet that have been disabled. - todd
