文章基本信息

标题：Cache Performance Optimization for SoC Vedio Applications
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作者：Li, Lei ; Zhang, Wei ; An, HuiYao 等
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2014
卷号：9
期号：7
页码：926-933
DOI：10.4304/jmm.9.7.926-933
语种：English
出版社：Academy Publisher
摘要：Chip Multiprocessors (CMPs) are adopted by industry to deal with the speed limit of the single-processor. But memory access has become the bottleneck of the performance, especially in multimedia applications. In this paper, a set of management policies is proposed to improve the cache performance for a SoC platform of video application. By analyzing the behavior of Vedio Engine, the memory-friendly writeback and efficient prefetch policies are adopted. The experiment platform is simulated by System C with ARM Cotex-A9 processor model. Experimental study shows that the performance can be improved by the proposed mechanism in contrast to the general cache without Last Level Cache (LLC): up to 18.87% Hit Rate increased, 10.62% MM Latency and 46.43% CPU Read Latency decreased for VENC/16way/64bytes; up to 52.1% Hit Rate increased, 11.43% MM Latency and 47.48% CPU Read Latency decreased for VDEC/16way/64bytes, but with only 8.62% and 4.23% Bandwidth increased respectively
关键词：CMP (Chip Multiprocessors);Memory Access;LLC (Last Level Cache);Writeback;Prefetch