Siddharth Garg Diana Marculescu Radu Marculescu Ümit Y. Ogras Technology-driven limits on DVFS controllability of multiple voltage-frequency island designs: a system-level perspective. 818-821 2009 DAC http://doi.acm.org/10.1145/1629911.1630120 conf/dac/2009 db/conf/dac/dac2009.html#GargMMO09