Hi all,

I ran into an issue with hyper threading on OSX this morning, and after a
discussion with Brad some questions were posed that seem better suited for
a group discussion.

Currently numCores (at least on linux) includes the count for
hyper-threading. This introduces some ambiguity in the meaning of
‘here.numCores’ (physical vs. logical), and raises some questions:
  - What should numCores represent?
  - Should we separate the notion of physical cores and the amount of
parallelism in hardware (new variable/name)?
  - What does this mean for dataParTasksPerLocale?

Hopefully this gets the ball rolling.

-Ben

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