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61.
62.
本文详细论述了TigerSHARC Ts201中cache的结构和运行原理,并给出了在DSP复位后对cache进行初始化和打开cache使其处于工作状态的汇编程序,最后通过常用的FFT程序使用cache前后DSP所消耗的时间显示了cache在提高DSP性能方面起到的重要作用。 相似文献
63.
There are increasing demands on portable communication devices to run multimedia applications. ISO (an International Organization
for Standardization) standard MPEG-4 is an important and demanding multimedia application. To satisfy the growing consumer
demands, more functions are added to support MPEG-4 video applications. With improved CPU speed, memory sub-system deficiency
is the major barrier to improving the system performance. Studies show that there is sufficient reuse of values for caching
that significantly reduce the memory bandwidth requirement for video data. Software decoding of MPEG-4 video data generates
much more cache-memory traffic than required. Proper understanding of the decoding algorithm and the composition of its data
set is obvious to improve the performance of such a system. The focus of this paper is cache modeling and optimization for
portable communication devices running MPEG-4 video decoding algorithm. The architecture we simulate includes a digital signal
processor (DSP) for running the MPEG-4 decoding algorithm and a memory system with two levels of caches. We use VisualSim
and Cachegrind simulation tools to optimize cache sizes, levels of associativity, and cache levels for a portable device decoding
MPEG-4 video.
Abu Asaduzzaman is, currently, a PhD candidate in the department of Computer Science and Engineering (CSE), Florida Atlantic University (FAU),
Boca Raton, Florida. He received his MS degree in computer engineering from FAU in 1997.
Mr. Asaduzzaman worked for ECI Telecom as a software engineer from 1998 to 2001. From 2001 to 2003, he worked for BlueCross
and BlueShield of Florida and SunPass (FDoT) as an IT Consultant. Currently, he is working as a research assistant at CSE
Dept, FAU. His research interests include cache optimization, architecture exploration, embedded system evaluation, and networks-on-a-chip
(NoC). He has published several research papers in these areas. Abu is a member of the honor society of Phi Kappa Phi, Tau
Beta Pi, Upsilon Phi Epsilon, and the Association for Computing Machinery (ACM) FAU Chapter.
Imad Mahgoub received the MS degree in applied mathematics and MS degree in electrical and computer engineering, both from North Carolina
State University, Raleigh in 1983 and 1986 respectively and the PhD degree in computer engineering from the Pennsylvania State
University, University Park, PA in 1989.
Dr. Mahgoub joined Florida Atlantic University (FAU), Boca Raton, Florida in 1989. Currently he is a full professor of Computer
Science and Engineering department and the director of the Mobile Computing Laboratory. His research interests include performance
evaluation, mobile computing, sensor networks, and parallel and distributed processing. He has published over 80 research
papers in these areas. He is the co-editor of the Mobile Computing Handbook and the Handbook of Sensor Networks. Dr. Mahgoub
has served on the program committees of numerous conferences. He has been the vice-chair for the Symposium on Performance
Evaluation of Computer and Telecommunication Systems (SPECTS) since 2003. He is a senior member of the IEEE. He is also a
member of Tau Beta Pi, Upsilon Pi Epsilon, the IEEE Computer Society, and the ACM. 相似文献
64.
阐述了代理服务器的网络结构及其工作原理,代理服务器端及其客户端的配置,实现了内部网与Internet网的互通。 相似文献
65.
基于协作缓存的VOD服务器端Cache设计 总被引:1,自引:0,他引:1
近年来,随着计算机网络技术和多媒体技术的发展,视频点播服务已逐渐成为现实。分布式VOD(VideoOnDemand)服务器系统的提出是为了支持更多的大量并发数据流,和单一服务器相比,这样的结构拥有更好的使用效率、可靠性和可扩展性。协作缓存CC(cooperativecache)技术将各服务器的内存协调工作,形成全局的cache。这样的结构不仅充分发挥了分布式VOD服务器结构的特点,同时也增大cache容量,提高系统全局命中率,从而提高了系统效率。该文在协作缓存技术基础上,针对流媒体和VOD系统的特点,提出了GBBcache替换算法。该算法以数据块的生命周期作为出发点,充分考虑了现有用户和请求接入用户的服务需求,提高了内存使用效率。笔者对该算法进行了理论分析,并证明了它在性能上与传统的cache替换算法相比的优越性。 相似文献
66.
67.
Gary Tyson Matthew Farrens John Matthews Andrew R. Pleszkun 《International journal of parallel programming》1997,25(3):213-242
As processor performance continues to improve, more demands are being placed on the performance of the memory system. The
caches employed in current processor designs are very similar to those described in early cache studies. In this paper, a
detailed characterization of data cache behavior for individual load instructions is given. It will be shown that by selectively
allocating cache lines according the characteristics of individual load instructions, overall performance can be improved
for both the data cache and the memory system. This approach can improve some aspects of memory performance by as much as
60 percent on existing executables.
This work was supported by National Science Foundation Grants CCR-94-03651, CCR-92-13651, CCR-92-13627, MIP-92-57259, and
generous grants from the SUN Microsystems and Tektronix corporations. 相似文献
68.
刘茜 《数字社区&智能家居》2007,(3):1449-1450,1463
随着开源工具的日趋流行,在开发系统过程中如何选择合适的工具已经是系统构架面临的首要问题。文章以设计历年考试试题类检索系统为例来介绍如何选择系统框架以及合适的开发工具,同时介绍开发系统值得考量的因素。 相似文献
69.
旁路攻击技术是对密码安全的严重威胁,其作用过程在于利用了密码软硬件实现上的特性而降低了密码分析的复杂性。AES作为目前与未来加密的主要标准,其安全性具有特殊重要的意义。然而,近期的研究表明,主流计算平台上的AES加密程序,很可能会遭受基于Cache所泄漏的运行信息而导致的攻击。本文依据相关的研究,介绍了基于Cache的AES攻击的原理,描述了其现状与发展,分析了这种攻击的现实可行性,并且,说明了反制攻击的措施建议。 相似文献
70.