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Synthesis of customized loop caches for core-based embedded systems

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2 Author(s)
Cotterell, S. ; Dept. of Comput. Sci. & Eng., California Univ., Riverside, CA, USA ; Vahid, F.

Embedded system programs tend to spend much time in small loops. Introducing a very small loop cache into the instruction memory hierarchy has thus been shown to substantially reduce instruction fetch energy. However, loop caches come in many sizes and variations-using the configuration best on the average may actually result in worsened energy for a specific program. We therefore introduce a loop cache exploration tool that analyzes a particular program's profile, rapidly explores the possible configurations, and generates the configuration with the greatest power savings. We introduce a simulation-based approach and show the good energy savings that a customized loop cache yields. We also introduce a fast estimation-based approach that obtains nearly the same results in seconds rather than tens of minutes or hours.

Published in:

Computer Aided Design, 2002. ICCAD 2002. IEEE/ACM International Conference on

Date of Conference:

10-14 Nov. 2002