In this chapter, we present the optimization strategy developed at NERSC for moving user applications from traditional x86 CPU based HPC systems to the many-core Xeon-Phi powered Cori system. We target the Xeon-Phi many-cores, large vector units and high-bandwidth memory. The developed strategy is general, intended to be applicable to NERSC's 6,000 users. We present three application case studies from different science areas to illustrate the Cori optimization process.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 firstname.lastname@example.org
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 email@example.com