I am also interested in taking power measurements on KNL. There is some information on this in Chapter 19 of the Xeon Phi Processor High Performance Programming book (link). The only method given in the book which appears to work is to use perf, i.e.:

> perf stat -a -e "power/energy-pkg/" <executable>

I would be interested in using ipmitool or turbostat, though I'm not yet sure how to do so.