On Thu, 15 Sep 2016 14:14:30 +0200
Pavel Machek [off-list ref] wrote:

Hi!

quoted

- Feature is enabled by default for single socket systems

With Intel® Turbo Boost Max Technology 3.0 (ITMT), single-threaded performance is
optimized by identifying processor's fastest core and running critical workloads
on it.
Refere to:
http://www.intel.com/content/www/us/en/architecture-and-technology/turbo-boost/turbo-boost-max-technology.html  

That does not really explain much.

How does it work? Do the different cores have different max
frequencies due to manufacturing differences? Ot is it running the
workload on coldest core?

That's all down to the CPU, not architectural and may change.

The ACPI tables describe which cores to use, whether that relates to
manufacturing, positioning or whatever isn't exposed.

Alan