Josep Torrellas (born 1963, Montblanc, Spain) is Professor and Willett Faculty Scholar in the Department of Computer Science and a research faculty for the Universal Parallel Computing Research Center at the University of Illinois Urbana–Champaign.
The Aggressive COMA research project was selected as one of the "Eight Point-Design Studies" that DARPA, NSF, NSA and NASA supported in the mid-nineties in a nationwide effort to accelerate the arrival of a petascale machine.
In the HPCS program, he is playing a leading role in helping define the architecture of IBM's PERCS multiprocessor (POWER7).
Torrellas is an IEEE and ACM[1] Fellow and member of the National Computational Science Alliance (NCSA) and the DOE Illinois Center for the Simulation of Advanced Rockets (CSAR).
He is currently the Chairman of IEEE Technical Committee on Computer Architecture (TCCA), an Associate Editor of the ACM Transactions on Architecture and Code Optimization (TACO), and a Member of the Advisory Board of the ECE Department, University of Rochester.