It is a well known fact that multiple virtual lanes can improve performance in interconnection
networks, but this knowledge has had little impact on real clusters. Currently, a large number …

The flip-chip package is introduced for modern IC designs with higher integration density,
larger I/O counts, faster speed, better signal integrity, etc. To ease design changes, an extra …

In the context of eXtended Generalized Fat Tree (XGFT) topologies, widely used in HPC and
datacenter network designs, we propose a generic method, based on Integer Linear …

In recent years, InfiniBand has become one of the leading interconnects for
highperformance systems. InfiniBand is not only the most popular interconnect used in the …

End-point hotspots can cause major slowdowns in interconnection networks due to head-of-
line blocking and congestion. Therefore, avoiding congestion is important to ensure high …

The fat-tree topology has become a popular choice for InfiniBand enterprise systems due to
its deadlock freedom, fault-tolerance and full bisection bandwidth. In the HPC domain …

Existing fat-tree routing algorithms fully exploit the path diversity of a fat-tree topology in the
context of compute node traffic, but they lack support for deadlock-free and fully connected …

For clusters where the topology consists of a fat-tree or more than one fat-tree combined into
one subnet, there are several properties that the routing algorithms should support, beyond …

Interconnection networks are widely deployed as the communication fabric in different
systems, ranging from internal networks in clusters to the wide area networks in public …

Building efficient supercomputers requires optimising communications, and their exaflopic
scale causes an unavoidable risk of relatively frequent failures. For a cluster with given …