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Interconnection networks must meet the communication demands of current High-Performance Computing systems. In order to interconnect efficiently the end nodes of these systems with a good performance-to-cost ratio, new network topologies have been proposed in the last years that leverage high-radix switches, such as Slim Fly. Adversarial traffic patterns, however, may reduce severely the performance...
The interconnection network has a large influence on total cost, application performance, energy consumption, and overall system efficiency of a supercomputer. Unfortunately, today's routing algorithms do not utilize this important resource most efficiently. We first demonstrate this by defining the dark fiber metric as a measure of unused resource in networks. To improve the utilization, we propose...
HPC network topology design is currently shifting from high-performance, higher-cost Fat-Trees to more cost-effective architectures. Three diameter-two designs, the Slim Fly, Multi-Layer Full-Mesh, and Two-Level Orthogonal Fat-Tree excel in this, exhibiting a cost per endpoint of only 2 links and 3 router ports with lower end-to-end latency and higher scalability than traditional networks of the same...
Efficient deadlock-free routing strategies are crucial to the performance of large-scale computing systems. There are many methods but it remains a challenge to achieve lowest latency and highest bandwidth for irregular or unstructured high-performance networks. % We investigate a novel routing strategy based on the single-source-shortest-path routing algorithm and extend it to use virtual channels...
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