@inproceedings {34107,
	title = {Adaptive Routing in InfiniBand Hardware},
	journal = {The 22nd IEEE/ACM International Symposium on Cluster, Cloud and Internet Computing},
	year = {2022},
	pages = {463-472},
	publisher = {IEEE},
	abstract = {Interconnection networks are the communication\&nbsp;backbone of modern high-performance computing systems and\&nbsp;an optimised interconnection network is crucial for the performance and utilisation of the system as a whole. One element of the interconnection network is the routing algorithm, which directly influences how we are able to utilise the physical network topology. InfiniBand is one of the most common network architectures used in high-performance computing and\&nbsp;traditionally it only supported static routing. For multi-path networks such as Fat-trees, static routing is inefficient because it cannot balance traffic in real-time nor utilise multiple paths\&nbsp;efficiently under adversarial traffic. This again potentially leads\&nbsp;to unnecessary contention and an underutilised network, which\&nbsp;has led to numerous proposals on how to avoid this by using\&nbsp;adaptive routing. Adaptive routing has recently\&nbsp; been introduced\&nbsp;in InfiniBand and in this paper we evaluate to what extent\&nbsp;the expected benefits of adaptive routing is true for InfiniBand.\&nbsp;Through a set of experiments on HDR InfiniBand equipment we\&nbsp;describe the basic behaviour of adaptive routing in InfiniBand,\&nbsp;its benefits in Fat tree topologies and the unfortunate side effects\&nbsp;related to unfairness that adaptive routing in general might\&nbsp;introduce, including such phenomena as the reverse parking lotproblem and congestion spreading.},
	author = {Rocher-Gonzalez, Jose and Ernst Gunnar {Gran} and Reinemo, Sven-Arne and Skeie, Tor and Escudero-Sahuquillo, Jes{\'u}s and Pedro Javier {Garc{\'\i}a} and Francisco Jos{\'e} {Quiles}}
}
