Title:
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Scalability of parallel video decoding on heterogeneous manycore architectures
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Author:
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Álvarez Mesa, Mauricio; Cabarcas Jaramillo, Felipe; Ramírez Bellido, Alejandro; Meenderinck, Cor; Juurlink, Ben; Valero Cortés, Mateo
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. CAP - Grup de Computació d'Altes Prestacions |
Abstract:
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This paper presents an analysis of the scalability of the parallel video decoding on heterogeneous many core architectures. As benchmark, we use a highly parallel H.264/AVC video decoder that generates a large number of independent tasks. In order to translate task-level parallelism into performance gains both the video decoder and the architecture have been optimized. The video decoder was modified for exploiting coarse-grain frame-level parallelism in the entropy decoding kernel which has been considered the main bottleneck. Second, a heterogeneous combination of cores is evaluated for executing different type of tasks. Finally, an evaluation of the memory requirements of the whole system has been carried out. Experiments conducted using a trace-driven simulation methodology shows that the evaluated system exhibits a good parallel scalability up to 68 cores. At this point the parallel video decoder is able to decode more than 200 HD frames per second using simple low power processors. |
Subject(s):
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-Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors -Parallel programming (Computer science) -Video compression -Parallel video decoding -H.264 -Heterogeneous computing -Manycore architectures -Programació en paral·lel (Informàtica) -Compressió de vídeo |
Rights:
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Document type:
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Article - Published version Report |
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