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• W2073263276 abstract "The code let model is a fine-grain dataflow-inspired program execution model that balances the parallelism and overhead of the runtime system. It plays an important role in terms of performance, scalability, and energy efficiency in exascale studies such as the DARPA UHPC project and the DOE X-Stack project. As an important application, the Fast Fourier Transform (FFT) has been deeply studied in fine-grain models, including the code let model. However, the existing work focuses on how fine-grain models achieve more balanced workload comparing to traditional coarse-grain models. In this paper, we make an important observation that the flexibility of execution order of tasks in fine-grain models improves utilization of memory bandwidth as well. We use the code let model and the FFT application as a case study to show that a proper execution order of tasks (or code lets) can significantly reduce memory contention and thus improve performance. We propose an algorithm that provides a heuristic guidance of the execution order of the code lets to reduce memory contention. We implemented our algorithm on the IBM Cyclops-64 architecture. Experimental results show that our algorithm improves up to 46% performance compared to a state-of-the-art coarse-grain implementation of the FFT application on Cyclops-64." @default.
• W2073263276 created "2016-06-24" @default.
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• W2073263276 date "2013-05-01" @default.
• W2073263276 modified "2023-09-26" @default.
• W2073263276 title "Towards Memory-Load Balanced Fast Fourier Transformations in Fine-Grain Execution Models" @default.
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• W2073263276 doi "https://doi.org/10.1109/ipdpsw.2013.47" @default.
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