Comparing and optimising parallel Haskell implementations for multicore machines

J. Berthold, S. Marlow, K. Hammond, A. D. Al Zain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this paper, we investigate the differences and tradeoffs imposed by two parallel Haskell dialects running on multicore machines. GpH and Eden are both constructed using the highly-optimising sequential GHC compiler, and share thread scheduling, and other elements, from a common code base. The GpH implementation investigated here uses a physically-shared heap, which should be well-suited to multicore architectures. In contrast, the Eden implementation adopts an approach that has been designed for use on distributed-memory parallel machines: a system of multiple, independent heaps (one per core), with inter-core communication handled by message-passing rather than through shared heap cells. We report two main results. Firstly, we report on the effect of a number of optimisations that we applied to the shared-memory GpH implementation in order to address some performance issues that were revealed by our testing: for example, we implemented a work-stealing approach to task allocation. Our optimisations improved the performance of the shared-heap GpH implementation by as much as 30% on eight cores. Secondly, the shared heap approach is, rather surprisingly, not superior to a distributed heap implementation: both give similar performance results. © 2009 IEEE.

Original languageEnglish
Title of host publicationICPPW 2009 - The 38th International Conference Parallel Processing Workshops
Pages386-393
Number of pages8
DOIs
Publication statusPublished - 2009
Event38th International Conference Parallel Processing Workshops - Vienna, Austria
Duration: 22 Sep 200925 Sep 2009

Conference

Conference38th International Conference Parallel Processing Workshops
Abbreviated titleICPPW 2009
CountryAustria
CityVienna
Period22/09/0925/09/09

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  • Cite this

    Berthold, J., Marlow, S., Hammond, K., & Al Zain, A. D. (2009). Comparing and optimising parallel Haskell implementations for multicore machines. In ICPPW 2009 - The 38th International Conference Parallel Processing Workshops (pp. 386-393) https://doi.org/10.1109/ICPPW.2009.10