DocumentCode :
1946764
Title :
Energy-efficiency of VLSI caches: a comparative study
Author :
Kamble, Milind B. ; Ghose, Kanad
Author_Institution :
Dept. of Comput. Sci., State Univ. of New York, Binghamton, NY, USA
fYear :
1997
fDate :
4-7 Jan 1997
Firstpage :
261
Lastpage :
267
Abstract :
We investigate the use of organizational alternatives that lead to more energy-efficient caches for contemporary microprocessors. Dissipative transitions are likely to be highly correlated and skewed in caches, precluding the use of simplistic hit/miss ratio based power dissipation models for accurate power estimations. We use a detailed register-level simulator for a typical pipelined CPU and its multi-level caches, and simulate the execution of the SPECint92 benchmarks to glean accurate transition counts. A detailed dissipation model for CMOS caches is introduced for estimating the energy dissipation based on electrical parameters of a typical circuit implementation and the transition counts collected by simulation. A block buffering scheme is presented to allow cache energy requirements to be reduced without increasing access latencies. We report results for a system with an off-chip L2 cache. We conclude that block buffering, with sub-banking to be very effective in reducing energy dissipation in the caches, and in the off-chip I/O pad drivers
Keywords :
VLSI; cache storage; microprocessor chips; pipeline processing; SPECint92 benchmarks; VLSI caches; access latencies; block buffering scheme; dissipation model; electrical parameters; energy efficiency; multi-level caches; off-chip I/O pad drivers; off-chip L2 cache; pipelined CPU; register-level simulator; Circuit simulation; Computer science; Delay; Energy dissipation; Energy efficiency; Microprocessors; Pipelines; Power dissipation; Semiconductor device modeling; Very large scale integration;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
VLSI Design, 1997. Proceedings., Tenth International Conference on
Conference_Location :
Hyderabad
ISSN :
1063-9667
Print_ISBN :
0-8186-7755-4
Type :
conf
DOI :
10.1109/ICVD.1997.568087
Filename :
568087
Link To Document :
بازگشت