Here is some more information attached.

Also, the CPU is actually Intel 6-core with HT so it appears as 12-core.
I can disable HT and see what it reports.  Also, running kernel
3.16.0-38-generic.

Back to another piece of interesting information, when I installed
Ubuntu 15.04 (just for fun to see if there was anything new that I might
want to take advantage of) all of these functions work just fine.  We
could possibly go down this route to find out which package or part of
the system allows libvirt to find this information properly.

Without going fully to 15.04 (as that defeats the purpose of LTS), what
would be a good package-by-package upstream path to try?  I can start
with kernel and work my way from there maybe?

Surprising to me why not many others have this type of issue.  The only
common factor I can tell (including other forum posts long since
forgotten) is Supermicro motherboard.

** Attachment added: "cpuinfo.txt"
   
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1446177/+attachment/4411527/+files/cpuinfo.txt

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https://bugs.launchpad.net/bugs/1446177

Title:
  Nodeinfo returns wrong NUMA topology / bad virtualization performance

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