Trace-Based Visualization as a Tool to Understand Applications' I/O Performance in Multi-core Machines

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 performa...

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Bibliographic Details
Published in2011 Second Workshop on Architecture and Multi-Core Applications (wamca 2011) pp. 5 - 11
Main Authors Kassick, R. V., Boito, F. Z., Diener, M., Navaux, P. O. A., Denneulin, Y., Schepke, C., Maillard, N., Osthoff, C., Grunmann, P., Dias, P., Panetta, J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2011
Subjects
Atmospheric modeling
Containers
Libraries
Meteorology
Multicore processing
Optimization
Scalability
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Summary: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.
ISBN:9781467302210
146730221X
DOI:10.1109/WAMCA.2011.12