AP-IO: Asynchronous Pipeline IO for Hiding Periodic Output Cost in CFD Simulation
Joint Authors
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-03
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
Computational fluid dynamics (CFD) simulation often needs to periodically output intermediate results to files in the form of snapshots for visualization or restart, which seriously impacts the performance.
In this paper, we present asynchronous pipeline I/O (AP-IO) optimization scheme for the periodically snapshot output on the basis of asynchronous I/O and CFD application characteristics.
In AP-IO, dedicated background I/O processes or threads are in charge of handling the file write in pipeline mode, therefore the write overhead can be hidden with more calculation than classic asynchronous I/O.
We design the framework of AP-IO and implement it in OpenFOAM, providing CFD users with a user-friendly interface.
Experimental results on the Tianhe-2 supercomputer demonstrate that AP-IO can achieve a good optimization effect for the periodical snapshot output in CFD application, and the effect is especially better for massively parallel CFD simulations, which can reduce the total execution time up to about 40%.
American Psychological Association (APA)
Xiaoguang, Ren& Xinhai, Xu. 2014. AP-IO: Asynchronous Pipeline IO for Hiding Periodic Output Cost in CFD Simulation. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1049013
Modern Language Association (MLA)
Xiaoguang, Ren& Xinhai, Xu. AP-IO: Asynchronous Pipeline IO for Hiding Periodic Output Cost in CFD Simulation. The Scientific World Journal No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-1049013
American Medical Association (AMA)
Xiaoguang, Ren& Xinhai, Xu. AP-IO: Asynchronous Pipeline IO for Hiding Periodic Output Cost in CFD Simulation. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1049013
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1049013