@techreport {icl:612, title = {On Scalability for MPI Runtime Systems}, journal = {University of Tennessee Computer Science Technical Report}, number = {ICL-UT-11-05}, year = {2011}, month = {2011-05}, address = {Knoxville, TN}, author = {George Bosilca and Thomas Herault and A. Rezmerita and Jack Dongarra} }