A Way Early Tag Access with Partial Tag Comparison Technique for Reducing Power Consumption of L1 Data Caches
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 5
Abstract
In this paper, we propose a new cache design technique, referred to as early tag access (ETA) cache, to improve the energy efficiency of data caches in embedded processors. The proposed technique performs ETAs to determine the destination ways of memory instructions before the actual cache accesses. It, thus, enables only the destination way to be accessed if a hit occurs during the ETA. The proposed ETA cache can be configured under two operation modes to exploit the trade-offs between energy efficiency and performance. It is shown that our technique is very effective in reducing the number of ways accessed during cache accesses. This enables significant energy reduction with negligible performance overheads. Simulation results demonstrate that the proposed ETA cache achieves over 52.8% energy reduction on average in the L1 data cache and translation look aside buffer. Compared with the existing cache design techniques, the ETA cache is more effective in energy reduction while maintaining better performance.
Authors and Affiliations
Neetha Anjelin D’sa, Manjunath Badiger
Keywords
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- EP ID EP20632
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