Tofu: Interconnect for the K computer

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Torus Interconnect • N-Dimensional torus interconnect • Coordinate: (x_1, x_2, …, x_n) • Ring for each direction • Each node links to a node right next to it • Distance between the two nodes is 1 • || a – b || = 1 • ||(1, 2, 3) – (1, 2, 2)|| = ||(0, 0, 1)|| = 1 • Boundary • Number of links 2 * D
Tofu Interconnect • Torus fusion interconnect • Developed by Fujitsu as a national project of Japan's Ministry of Education, Culture, Sports, Science and Technology (MEXT) • Proprietary • 6D torus interconnect • Can accompany 100,000 nodes • Used by the K Computer by Fujistu (ranked No.3 on Top500)
Page 1 and 2: Tofu: Interconnect for the K comput
Page 3 and 4: Outline • Torus Interconnect •
Page 5: Torus Interconnect
Page 9 and 10: Tofu Topology
Page 11 and 12: Tofu Design • Tofu Network Router
Page 13 and 14: Tofu Feature • Fault tolerant tor
Page 15 and 16: Tofu Feature • Throughput and pac
Page 17 and 18: Tofu Feature • Integrated collect
Page 19 and 20: Tofu Performance • Realistic thro
Page 21 and 22: Tofu Performance Rmax/Rpeak 64.8 %
Page 23: Q&A

Tofu: Interconnect for the K computer

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