Josep Torrellas Bill Gropp Vivek Sarkar Jaime H. Moreno Kunle Olukotun Extreme scale computing: Challenges and opportunities. 1 2010 HPCA http://dx.doi.org/10.1109/HPCA.2010.5416647 conf/hpca/2010 db/conf/hpca/hpca2010.html#TorrellasGSMO10