Abstract
In the previous chapter we have analyzed various parallelization approaches for H.264 decoding and concluded that in order to scale to a large number of cores, macroblock-level parallelism needs to be exploited. The next question is how to efficiently exploit this parallelism. In other words, how to map this parallelism onto a multi-/many-core architecture. To answer this question, in this chapter we present two implementations of the 2D-Wave approach. The first implementation maintains a centralized pool of macroblocks that are ready to be decoded and cores retrieve tasks from this Task Pool. In the second approach, called Ring-Line, full lines of macroblocks are statically assigned to cores and the cores synchronize and communicate point-to-point. Both approaches have been implemented and are evaluated on a dual-chip Cell BE system with 18 cores in total.
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Juurlink, B., Alvarez-Mesa, M., Chi, C.C., Azevedo, A., Meenderinck, C., Ramirez, A. (2012). Exploiting Parallelism: the 2D-Wave. In: Scalable Parallel Programming Applied to H.264/AVC Decoding. SpringerBriefs in Computer Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2230-3_4
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DOI: https://doi.org/10.1007/978-1-4614-2230-3_4
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