NDLI: Exploiting temporal locality in drowsy cache policies

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Exploiting temporal locality in drowsy cache policies

Content Provider	ACM Digital Library
Author	Sahuquillo, Julio Petit, Salvador Kaeli, David Such, Jose M.
Abstract	Technology projections indicate that static power will become a major concern in future generations of high-performance microprocessors. Caches represent a significant percentage of the overall microprocessor die area. Therefore, recent research has concentrated on the reduction of leakage current dissipated by caches. The variety of techniques to control current leakage can be classified as non-state preserving or state preserving. Non-state preserving techniques power off selected cache lines while state preserving place selected lines into a low-power state. Drowsy caches are a recently proposed state-preserving technique. In order to introduce low performance overhead, drowsy caches must be very selective on which cache lines are moved to a drowsy statePast research on cache organization has focused on how best to exploit the temporal locality present in the data stream. In this paper we propose a novel drowsy cache policy called Reuse Most Recently used On (RMRO), which makes use of reuse information to trade off performance versus energy consumption. Our proposal improves the hit ratio for drowsy lines by about 67%, while reducing the power consumption by about 11.7% (assuming 70nm technology) with respect to previously proposed drowsy cache policies.
Starting Page	371
Ending Page	377
Page Count	7
File Format	PDF
ISBN	1595930191
DOI	10.1145/1062261.1062321
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2005-05-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Drowsy cache policies Set-associative caches Temporal locality Reuse information Low-power
Content Type	Text
Resource Type	Article

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