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Joint application-architeture design space exploration of multimedia applications on many-core platforms - an experimental analysis

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Abstract

The design space of mapping multimedia applications on an architectural platform is complex and many parameters are needed to be considered in order to find the optimum mapping. Conventionally, architectural parameters are varied to find different design points and the application side parameters are considered fixed and unchanged, while multimedia applications are equipped with several configurations to control the complexity and quality of the output. In this paper, we experimentally investigate joint application-architecture design space exploration of multimedia applications on many-core platforms. The joint exploration is conducted on two state of the art video coding standards and STHorm many-core platform as the underlying architecture. In the first case study, MPEG4-SP decoder is mapped on STHorm with varying buffer size and variable number of Processing Elements (PEs). In the second case study, HEVC (High Efficiency Video Coding) decoder with variable Quantization Parameter (QP) is mapped on STHorm with variable PE number. The application is characterized with representative parameters on the basis of high level dataflow representation of the application. It is demonstrated that joint exploration of these parameters outperforms that of their separate exploration in terms of well-established combinatory metrics such as space-time product and energy-time product metrics while achieving performance constraints.

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Acknowledgment

Part of this research has been conducted in EPFL SCI-STI-MM lab under supervision of Dr. Marco Mattavelli. The authors are grateful for the STHorm platform simulation environment provided by the lab and the application models. Useful discussions, help and support from all the team members are also appreciated heartily by authors.

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Authors and Affiliations

  1. Multimedia Processing Laboratory, School of Electrical and Computer Engineering College of Engineering, University of Tehran, Tehran, Iran

    Maryam Moghadas & Mahmoud Reza Hashemi

  2. EPFL Alumni, EPFL University, Lausanne, Switzerland

    Hossein Afshari

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  1. Maryam Moghadas
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  2. Hossein Afshari
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  3. Mahmoud Reza Hashemi
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Correspondence to Maryam Moghadas.

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Moghadas, M., Afshari, H. & Hashemi, M.R. Joint application-architeture design space exploration of multimedia applications on many-core platforms - an experimental analysis. Multimed Tools Appl 75, 11291–11310 (2016). https://doi.org/10.1007/s11042-015-2854-4

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  • DOI: https://doi.org/10.1007/s11042-015-2854-4

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