%0 Journal Article
%T IPULOC - Exploring Dynamic Program Locality with the Instruction Processing Unit for Filling Memory Gap<br>IPULOC—Exploring Dynamic Program Locality with the Instruction Processing Unit for Filling Memory Gap
%A Huang Zhenchun
%A and Li Sanli
%A <br>黄震春
%A 李三立
%J 计算机科学技术学报
%D 2002
%I 
%X Memory gap has become an essential factor influencing the peak performance of high-speed CPU-based systems. To fill this gap, enlarging cache capacity has been a traditional method based on static program locality principle. However, the order of instructions stored in I-Cache before being sent to Data Processing Unit (DPU) is a kind of useful information that has not ever been utilized before. So an architecture containing an Instruction Processing Unit (IPU) in parallel with the ordinary DPU is proposed. The IPU can prefetch, analyze and preprocess a large amount of instructions otherwise lying in the I-Cache untouched. It is more efficient than the conventional prefetch buffer that can only store several instructions for previewing. By IPU, Load Instructions can be preprocessed while the DPU is executing on data simultaneously. It is termed as “Instruction Processing Unit with LOokahead Cache” (IPULOC for short) in which the idea of dynamic program locality is presented. This paper describes the principle of IPULOC and illustrates the quantitative parameters for evaluation. Tools for simulating the IPULOC have been developed. The simulation results shows that it can improve program locality during program execution, and hence can improve the cache hit ratio correspondingly without further enlarging the on-chip cache that occupies a large portion of chip area. This work is supported by the National Natural Science Foundation of China (No.69973024). HUANG Zhenchun is pursuing the Ph.D. degree in computer science at Tsinghua University, Beijing. He received the B.S. in computer science from Tsinghua University, Beijing in 1996. LI Sanli is a professor of computer science and engineering at Tsinghua University, where he devotes to computer architecture. He received his Ph.D. degree from the Academy of Sciences, USSR. He is a member of the Chinese Academy of Engineering.
%K memory gap
%K IPULOC
%K instruction processing unit<br>指令处理单元
%K 动态程序位置
%K 存储间隙
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=F57FEF5FAEE544283F43708D560ABF1B&aid=A2CAD17BBE6E5DA3A0E5467B914E3987&yid=C3ACC247184A22C1&vid=BCA2697F357F2001&iid=0B39A22176CE99FB&sid=2B25C5E62F83A049&eid=2B25C5E62F83A049&journal_id=1000-9000&journal_name=计算机科学技术学报&referenced_num=0&reference_num=11