Sep 2, 2012
Highly-scalable and light-weight design of the Tofu interconnect (Ajima)
The Tofu interconnect is an interconnection network designed for the K computer and its commercial version Fujitsu PRIMEHPC FX10. Tofu interconnects tens of thousands of nodes. The network topology of the Tofu interconnect is a highly-scalable six-dimensional mesh/torus. Some dimensions are configured as rings and contribute to the availability and the serviceability of the system. The packet delivery system and endpoint system are holistically designed to make the communication protocol of the Tofu interconnect light-weight. The protocol depends on guaranteed and in-order packet delivery.