A Fully Compliant OpenMP implementation on Software Distributed Shared Memory

Brorsson, Mats, 1962- (author): KTH,Programvaru- och datorsystem, SCS,Kista Multicore Center

(creator_code:org_t)

Abstract Subject headings

OpenMP is a relatively new industry standard for programming parallel computers with a shared memory programming model. Given that clusters of workstations are a cost-effective solution to build parallel platforms, it would of course be highly interesting if the OpenMP model could be extended to these systems as well as to the standard shared memory architectures for which it was originally intended. We present in this paper a fully compliant implementation of the OpenMP specification 1.0 for C targeting networks of workstations. We have used an experimental software distributed shared memory system, CVM, to implement a run-time library which is the target of a source-to-source OpenMP translator also developed in this project. The system has been evaluated using an OpenMP microbenchmark suite used to evaluate the effect of some memory coherence protocol improvements. We have also used OpenMP versions of three Splash-2 applications concluding in reasonable speedups on an IBM SP machine with eight nodes. This is the first study to investigate the subtle mechanisms of consistency in OpenMP on software DSM systems.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Computer Systems

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