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Performance of a parallel code for the Euler equations on hypercube computers

Author
Barszcz, Eric
Published
Apr 1, 1990.
Physical Description
1 electronic document
Additional Creators
Tuminaro, Raymond S., Jesperson, Dennis C., and Chan, Tony F.
Online Version

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Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
The performance of hypercubes were evaluated on a computational fluid dynamics problem and the parallel environment issues were considered that must be addressed, such as algorithm changes, implementation choices, programming effort, and programming environment. The evaluation focuses on a widely used fluid dynamics code, FLO52, which solves the two dimensional steady Euler equations describing flow around the airfoil. The code development experience is described, including interacting with the operating system, utilizing the message-passing communication system, and code modifications necessary to increase parallel efficiency. Results from two hypercube parallel computers (a 16-node iPSC/2, and a 512-node NCUBE/ten) are discussed and compared. In addition, a mathematical model of the execution time was developed as a function of several machine and algorithm parameters. This model accurately predicts the actual run times obtained and is used to explore the performance of the code in interesting but yet physically realizable regions of the parameter space. Based on this model, predictions about future hypercubes are made.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19910002071.
Accession ID: 91N11384.
NASA-TM-102260.
A-90020.
NAS 1.15:102260.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15684025