The impact of traffic localisation on the performance of nocs for very large manycore systems

Sharifa Al Khanjari*, Wim Vanderbauwhede

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


The scaling of semiconductor technologies is leading to processors with increasing numbers of cores. The adoption of Networks-on-Chip (NoC) in manycore systems requires a shift in focus from computation to communication, as communication is fast becoming the dominant factor in processor performance. In large manycore systems, performance is predicated on the locality of communication. In this work, we investigate the performance of three NoC topologies for systems with thousands of processor cores under two types of localised traffic. We present latency and throughput results comparing fat quadtree, concentrated mesh and mesh topologies under different degrees of localisation. Our results, based on the ITRS physical data for 2023, show that the type and degree of localisation of traffic significantly affects the NoC performance, and that scale-invariant topologies perform worse than flat topologies.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalProcedia Computer Science
Issue number1
Publication statusPublished - 2015
Externally publishedYes
Event29th European Conference on Solid-State Transducers, EUROSENSORS 2015; Freiburg; Germany; 6 September 2015 through 9 September 2015. - Freiburg, Germany
Duration: Sept 6 2015Sept 9 2015


  • Locality
  • Manycore
  • NUMA
  • Network on chip

ASJC Scopus subject areas

  • Computer Science(all)


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