Computer Architecture and Operating Systems Department, Universitat Autònoma de Barcelona, Bellaterra, Spain. gonzalo.vera@rparallel.org|Computer Architecture and Operating Systems Department, Universitat Autònoma de Barcelona, Bellaterra, Spain. gonzalo.vera@rparallel.org|Computer Architecture and Operating Systems Department, Universitat Autònoma de Barcelona, Bellaterra, Spain. gonzalo.vera@rparallel.org