Vectored read: Exploiting the read performance of hybrid NAND flash

Hyun Seunghwan, Lee Sehwan, Ahn Sungyong, Bahn Hyokyung, Koh Kern

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

OneNAND flash is a NAND based hybrid flash memory which offers much better read/write performance and other functionalities than standard NAND flash memory. Because of its superior read performance, OneNAND flash became the most promising storage solution for implementing high performance mobile device which adopts demand paging memory architecture. However, unfortunately, existing general purpose operating systems, such as Linux, fail to exploit the read performance of OneNAND flash because of a restriction imposed by their I/O architecture and device driver interface. This paper investigated the cause of such inability, and proposed the design of vectored read scheme for solving that problem. Implementation studies on Linux kernel shows that vectored read scheme reduces the block level read latency of OneNAND flash by up to 41% compared with commercial FTL device. It also proved its effectiveness in real-world applications by reducing page fault handling time by 28%.

Original languageEnglish
Title of host publicationProceedings - 14th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2008
Pages177-184
Number of pages8
DOIs
StatePublished - 2008
Event14th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2008 - Kaohsiung, Taiwan, Province of China
Duration: 25 Aug 200827 Aug 2008

Publication series

NameProceedings - 14th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2008

Conference

Conference14th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications, RTCSA 2008
Country/TerritoryTaiwan, Province of China
CityKaohsiung
Period25/08/0827/08/08

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