Surprisingly many demanding applications such as high-end mobile games are essentially single-threaded (=there's one big main thread and then a number of helper

Surprisingly many demanding applications such as high-end mobile games are essentially single-threaded (=there's one big main thread and then a number of helper threads with only a fractional load), and thus produce asymmetric loads and also very serialized execution between cpu and gpu. Thus, managing power becomes most difficult.