Trace-based Visualization as a Tool to Understand Applications I/O Performance

Abstract : This paper presents the use of trace-based performance visualization of a large scale atmospheric model, the Ocean-Land-Atmosphere Model (OLAM). The trace was obtained with the libRastro library, and the visualization was done with Paje. The use of visualization aimed to analyze OLAM's performance and to identify its bottlenecks. Especially, we are interested in the model's I/O operations, since it was proved to be the main issue for the model's performance. We show that most of the time spent in the output routine is spent in the close operation. With this information, we delayed this operation until the next output phase, obtaining improved I/O performance.
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Contributor : Arnaud Legrand <>
Submitted on : Friday, February 15, 2013 - 11:16:12 AM
Last modification on : Thursday, November 8, 2018 - 2:24:07 PM




Rodrigo Kassick, Carla Osthoff, Philippe O. A. Navaux, Francieli Zanon Boito, Cláudio Schepke, et al.. Trace-based Visualization as a Tool to Understand Applications I/O Performance. Proceedings of the SBAC-PAD 2011 - WAMCA 2011 workshop, 2011, Vitoria, Espirito Santo, Brazil. pp.5-11, ⟨10.1109/WAMCA.2011.12⟩. ⟨hal-00788781⟩



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