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Efficient OpenMP support and extensions for MPSoCs with explicitly managed memory hierarchy

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2 Author(s)
Marongiu, A. ; Univ. of Bologna, Bologna ; Benini, L.

OpenMP is a de facto standard interface of the shared address space parallel programming model. Recently, there have been many attempts to use it as a programming environment for embedded MultiProcessor Systems-On-Chip (MPSoCs). This is due both to the ease of specifying parallel execution within a sequential code with OpenMP directives, and to the lack of a standard parallel programming method on MPSoCs. However, MPSoC platforms for embedded applications often feature non-uniform, explicitly managed memory hierarchies with no hardware cache coherency as well as heterogeneous cores with heterogeneous run-time systems. In this paper we present an optimized implementation of the compiler and runtime support infrastructure for OpenMP programming for a non-cache-coherent distributed memory MPSoC with explicitly managed scratchpad memories (SPM). The proposed framework features specific extensions to the OpenMP programming model that leverage explicit management of the memory hierarchy. Experimental results on different real-life applications confirm the effectiveness of the optimization in terms of performance improvements.

Published in:

Design, Automation & Test in Europe Conference & Exhibition, 2009. DATE '09.

Date of Conference:

20-24 April 2009

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