Copyright by William Lloyd Bircher 2010 - The Laboratory for ...

performance is increased by 5.4% and while power consumption is reduced by 3.8%. We
show that processor power can be predicted by PPPP with accuracy 4.8% better than a
last-value predictor.
Predictive schemes such as PPPP are the next step in improving performance and
efficiency of systems employing dynamic power management. As it was demonstrated in
the pursuit of higher single-threaded processor performance, the highest possible
performance is achieved when costly phase changes can be predicted. Prediction allows
the use of more aggressive power saving techniques since excessive performance loss can
be avoided.
146