Analysis of parallelisation of 3D-CEMBS model using technologies like OpenACC and OpenMP
Journal Title: Biuletyn Instytutu Morskiego - Year 2015, Vol 2, Issue 1
Abstract
Oceanographic models utilise parallel computing techniques to increase their performance. Computer hardware constantly evolves and software should follow to better utilise modern hardware potential. The number of CPU cores with access to shared memory increases with hardware evolution. To fully utilise the possibilities new hardware presents, parallelisation techniques employed in oceanographic models, which were designed with distributed memory systems in mind, have to be revised. This research focuses on analysing the 3D-CEMBS model to assess the feasibility of using OpenMP and OpenACC technologies to increase performance. This was done through static code analysis and profiling. The findings show that the main performance problems are attributed to task decomposition that was designed with distributed memory systems in mind. To fully utilise modern shared memory systems, other task decomposition strategies need to be employed.The presented 3D-CEMBS model analysis is a first stage in wider research of oceanographic models as a specific class of parallel applications. In the long term the research will result in proposing design patterns tailored for oceanographic models that would exploit their characteristics to achieve better hardware utilisation on evolving hardware architectures.
Authors and Affiliations
Piotr Piotrowski
Keywords
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