The Cray XT4 and Seastar 3-D Torus Interconnect


The Cray XT4 system is a distributed memory multiprocessor combining an aggressive superscalar processor (AMD64) with a bandwidth-rich 3-D torus interconnection network that scales up to 32K processing nodes. This chapter provides an overview of the Cray XT4 system architecture and a detailed discussion of its interconnection network.