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2008

Energy-Aware Flash Memory Management in Virtual Memory System

9 years 6 months ago
Energy-Aware Flash Memory Management in Virtual Memory System
The traditional virtual memory system is designed for decades assuming a magnetic disk as the secondary storage. Recently, flash memory becomes a popular storage alternative for many portable devices with the continuing improvements on its capacity, reliability and much lower power consumption than mechanical hard drives. The characteristics of flash memory are quite different from a magnetic disk. Therefore, in this paper, we revisit virtual memory system design considering limitations imposed by flash memory. In particular, we focus on the energy efficient aspect since power is the first-order design consideration for embedded systems. Due to the write-once feature of flash memory, frequent writes incur frequent garbage collection thereby introducing significant energy overhead. Therefore, in this paper, we propose three methods to reduce writes to flash memory. The HotCache scheme adds an SRAM cache to buffer frequent writes. The subpaging technique partitions a page into subunits, ...
Han-Lin Li, Chia-Lin Yang, Hung-Wei Tseng
Added 16 Dec 2010
Updated 16 Dec 2010
Type Journal
Year 2008
Where TVLSI
Authors Han-Lin Li, Chia-Lin Yang, Hung-Wei Tseng
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