ref: 656f4a88cfe654defd3af9a8c4ffbe92f68efe90
parent: c37d012ada8e985adcfecbb4591d276f7e427eb0
author: paulwilkins <paulwilkins@google.com>
date: Tue Aug 9 06:10:16 EDT 2016
Modified ARF group allocation. Small average gains in the range 0.05 - 0.1 Change-Id: I30e85c04be615cc84726427c5057388b20a6ff60