Micro-benchmarks for cluster openmp implementations: Memory consistency costs

H. J. Wong, J. Cai, A. P. Rendell, P. Strazdins

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)


The OpenMP memory model allows for a temporary view of shared memory that only needs to be made consistent when barrier or flush directives, including those that are implicit, are encountered. While this relaxed memory consistency model is key to developing cluster OpenMP implementations, it means that the memory performance of any given implementation is greatly affected by which memory is used, when it is used, and by which threads. In this work we propose a micro-benchmark that can be used to measure memory consistency costs and present results for its application to two contrasting cluster OpenMP implementations, as well as comparing these results with data obtained from a hardware supported OpenMP environment.

Original languageEnglish
Title of host publicationOpenMP in a New Era of Parallelism - 4th International Workshop, IWOMP 2008, Proceedings
Number of pages11
Publication statusPublished - 1 Dec 2008
Externally publishedYes
Event4th International Workshop on OpenMP, IWOMP 2008 - West Lafayette, IN, United States
Duration: 12 May 200814 May 2008

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5004 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference4th International Workshop on OpenMP, IWOMP 2008
Country/TerritoryUnited States
CityWest Lafayette, IN


  • shared memory
  • chunk size
  • cache coherency


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