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2005
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On the Feasibility of Optical Circuit Switching for High Performance Computing Systems

9 years 5 months ago
On the Feasibility of Optical Circuit Switching for High Performance Computing Systems
The interconnect plays a key role in both the cost and performance of large-scale HPC systems. The cost of future high-bandwidth electronic interconnects is expected to increase due to expensive optical transceivers needed between switches. We describe a potentially cheaper and more power-efficient approach to building high-performance interconnects. Through empirical analysis of HPC applications, we find that the bulk of inter-processor communication (barring collectives) is bounded in degree and changes very slowly or never. Thus we propose a two-network interconnect: An Optical Circuit Switching (OCS) network handling long-lived bulk data transfers, using optical switches; and a secondary lower-bandwidth Electronic Packet Switching (EPS) network. An OCS could be significantly cheaper than an all electronic network as it uses fewer optical transceivers. Collectives and transient communication packets traverse the electronic network. We present compiler techniques and dynamic runtime...
Kevin J. Barker, Alan F. Benner, Raymond R. Hoare,
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where SC
Authors Kevin J. Barker, Alan F. Benner, Raymond R. Hoare, Adolfy Hoisie, Alex K. Jones, Darren J. Kerbyson, Dan Li, Rami G. Melhem, Ramakrishnan Rajamony, Eugen Schenfeld, Shuyi Shao, Craig B. Stunkel, Peter Walker
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