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OpenMP on Networks of Workstations (1998)
| Citations: | 43 - 6 self |
BibTeX
@MISC{Lu98openmpon,
author = {Honghui Lu and Y. Charlie Hu and Willy Zwaenepoel},
title = {OpenMP on Networks of Workstations},
year = {1998}
}
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Abstract
We describe an implementation of a sizable subset of OpenMP on networks of workstations (NOWs). By extending the availability of OpenMP to NOWs, we overcome one of its primary drawbacks compared to MPI, namely lack of portability to environments other than hardware shared memory machines. In order to support OpenMP execution on NOWs, our compiler targets a software distributed shared memory system (DSM) which provides multi-threaded execution and memory consistency. This paper presents two contributions. First, we identify two aspects of the current OpenMP standard that make an implementation on NOWs hard, and suggest simple modifications to the standard that remedy the situation. These problems reflect differences in memory architecture between software and hardware shared memory and the high cost of synchronization on NOWs. Second, we present performance results of a prototype implementation of an OpenMP subset on a NOW, and compare them with hand-coded software DSM and MP...
Keyphrases
multi-threaded execution memory consistency memory system simple modification sizable subset openmp execution openmp subset hand-coded software dsm prototype implementation current openmp standard memory machine memory architecture high cost now hard present performance result primary drawback
