Pedro Yebenes Segura

• University of Castilla-La Mancha

Hybrid and direct topologies are cost-efficient and scalable options to interconnect thousands of end nodes in high-performance computing (HPC) systems. They offer a rich path diversity, high bisection bandwidth, and a reduced diameter guaranteeing low latency. In these topologies, efficient deterministic routing algorithms can be used to balance s...

Interconnection network performance is a key issue in HPC systems and datacenters, especially as their number of end nodes grows, to cope with application needs. The network topology and the routing algorithm are important factors for performance and cost. Topologies such as fat-tree or Dragonfly were proposed to maximize network performance while...

Dragonfly topologies are gathering great interest as one of the most promising interconnect options for High-Performance Computing systems. Dragonflies contain physical cycles that may lead to traffic deadlocks unless the routing algorithm prevents them properly. Previous topology-aware algorithms are difficult to implement, or even unfeasible, in...

The number of endnodes in high-performance computing systems has grown significantly in the last years. Hence, the interconnection network has become an essential issue as it may end up being the system bottleneck if it is not properly designed. In that sense, the Dragonfly topology has become very popular for interconnecting high-performance compu...

The performance of interconnection networks is a challenging issue for High-Performance Computing (HPC) systems, which becomes even more important when the number of interconnected endnodes grows. In that sense, Dragonfly interconnection patterns are a very popular option to configure the network topology, especially for large systems, as they are...

Current high-performance platforms such as Datacenters or High-Performance Computing systems rely on highspeed interconnection networks able to cope with the ever-increasing communication requirements of modern applications. In particular, in high-performance systems that must offer differentiated services to applications which involve traffic prio...

Head-of-Line (HoL) blocking is a well-known phenomenon that may dramatically degrade the performance of the modern high-performance interconnection networks. Many techniques have been proposed to solve this problem, most of them based on separating traffic flows into different queues at switch ports. However, the efficiency of these proposals may v...

One of the objectives of the decade for High-Performance Computing systems is to reach the exascale level of computing power before 2018, hence this will require strong efforts in their design. In that sense, High-speed low-latency interconnection networks are essential elements for exascale HPC systems. Indeed, the performance of the whole system...