KLA Conference Paper uri icon


  • This paper proposes a new algorithmic paradigm - k-level asynchronous (KLA) - that bridges level-synchronous and asynchronous paradigms for processing graphs. The KLA paradigm enables the level of asynchrony in parallel graph algorithms to be parametrically varied from none (level-synchronous) to full (asynchronous). The motivation is to improve execution times through an appropriate trade-off between the use of fewer, but more expensive global synchronizations, as in level-synchronous algorithms, and more, but less expensive local synchronizations (and perhaps also redundant work), as in asynchronous algorithms. We show how common patterns in graph algorithms can be expressed in the KLA pardigm and provide techniques for determining k, the number of asynchronous steps allowed between global synchronizations. Results of an implementation of KLA in the STAPL Graph Library show excellent scalability on up to 96K cores and improvements of 10x or more over level-synchronous and asynchronous versions for graph algorithms such as breadth-first search, PageRank, k-core decomposition and others on certain classes of real-world graphs. © 2014 ACM.

name of conference

  • International Conference on Parallel Architectures and Compilation, PACT '14, Edmonton, AB, Canada, August 24-27, 2014

published proceedings


altmetric score

  • 3

author list (cited authors)

  • Harshvardhan, .., Fidel, A., Amato, N. M., & Rauchwerger, L

citation count

  • 25

complete list of authors

  • Fidel, Adam||Amato, Nancy M||Rauchwerger, Lawrence

editor list (cited editors)

  • Amaral, J. N., & Torrellas, J.

publication date

  • January 2014


  • ACM  Publisher